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annotate packages/net/tcpip/current/src/sys/netinet/ip_input.c @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // sys/netinet/ip_input.c
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4 //
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5 //
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6 //
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7 //==========================================================================
2729
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8 // ####BSDALTCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // Portions of this software may have been derived from OpenBSD
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11 // or other sources, and if so are covered by the appropriate copyright
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12 // and license included herein.
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13 // -------------------------------------------
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14 // ####BSDALTCOPYRIGHTEND####
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15 //==========================================================================
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16 //#####DESCRIPTIONBEGIN####
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17 //
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18 // Author(s): gthomas
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19 // Contributors: gthomas
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20 // Date: 2000-01-10
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21 // Purpose:
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22 // Description:
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23 //
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24 //
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25 //####DESCRIPTIONEND####
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26 //
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27 //==========================================================================
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30 /* $OpenBSD: ip_input.c,v 1.44 1999/12/08 06:50:20 itojun Exp $ */
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31 /* $NetBSD: ip_input.c,v 1.30 1996/03/16 23:53:58 christos Exp $ */
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32
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33 /*
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34 * Copyright (c) 1982, 1986, 1988, 1993
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35 * The Regents of the University of California. All rights reserved.
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36 *
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37 * Redistribution and use in source and binary forms, with or without
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38 * modification, are permitted provided that the following conditions
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39 * are met:
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40 * 1. Redistributions of source code must retain the above copyright
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41 * notice, this list of conditions and the following disclaimer.
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42 * 2. Redistributions in binary form must reproduce the above copyright
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43 * notice, this list of conditions and the following disclaimer in the
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44 * documentation and/or other materials provided with the distribution.
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45 * 3. All advertising materials mentioning features or use of this software
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46 * must display the following acknowledgement:
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47 * This product includes software developed by the University of
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48 * California, Berkeley and its contributors.
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49 * 4. Neither the name of the University nor the names of its contributors
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50 * may be used to endorse or promote products derived from this software
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51 * without specific prior written permission.
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52 *
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53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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63 * SUCH DAMAGE.
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64 *
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65 * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
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66 */
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67
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68 #include <sys/param.h>
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69 #ifndef __ECOS
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70 #include <sys/systm.h>
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71 #endif
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72 #include <sys/malloc.h>
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73 #include <sys/mbuf.h>
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74 #include <sys/domain.h>
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75 #include <sys/protosw.h>
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76 #include <sys/socket.h>
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77 #include <sys/errno.h>
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78 #include <sys/time.h>
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79 #include <sys/kernel.h>
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80 #ifndef __ECOS
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81 #include <sys/syslog.h>
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82 #include <sys/proc.h>
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83
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84 #include <vm/vm.h>
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85 #include <sys/sysctl.h>
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86 #endif
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87
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88 #include <net/if.h>
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89 #include <net/if_dl.h>
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90 #include <net/route.h>
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91
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92 #include <netinet/in.h>
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93 #include <netinet/in_systm.h>
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94 #include <netinet/if_ether.h>
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95 #include <netinet/ip.h>
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96 #include <netinet/in_pcb.h>
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97 #include <netinet/in_var.h>
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98 #include <netinet/ip_var.h>
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99 #include <netinet/ip_icmp.h>
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100 #include <netinet/ip_ipsp.h>
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101
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102 #ifdef __ECOS
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103 #include <stdio.h> // for 'sprintf()'
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104 #endif
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105
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106 #ifndef IPFORWARDING
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107 #ifdef GATEWAY
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108 #define IPFORWARDING 1 /* forward IP packets not for us */
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109 #else /* GATEWAY */
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110 #define IPFORWARDING 0 /* don't forward IP packets not for us */
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111 #endif /* GATEWAY */
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112 #endif /* IPFORWARDING */
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113 #ifndef IPSENDREDIRECTS
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114 #define IPSENDREDIRECTS 1
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115 #endif
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116
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117 int encdebug = 0;
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118
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119 /*
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120 * Note: DIRECTED_BROADCAST is handled this way so that previous
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121 * configuration using this option will Just Work.
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122 */
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123 #ifndef IPDIRECTEDBCAST
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124 #ifdef DIRECTED_BROADCAST
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125 #define IPDIRECTEDBCAST 1
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126 #else
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127 #define IPDIRECTEDBCAST 0
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128 #endif /* DIRECTED_BROADCAST */
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129 #endif /* IPDIRECTEDBCAST */
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130 int ipforwarding = IPFORWARDING;
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131 int ipsendredirects = IPSENDREDIRECTS;
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132 int ip_dosourceroute = 0; /* no src-routing unless sysctl'd to enable */
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133 int ip_defttl = IPDEFTTL;
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134 int ip_directedbcast = IPDIRECTEDBCAST;
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135 #ifdef DIAGNOSTIC
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136 int ipprintfs = 0;
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137 #endif
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138
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139 int ipsec_auth_default_level = IPSEC_AUTH_LEVEL_DEFAULT;
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140 int ipsec_esp_trans_default_level = IPSEC_ESP_TRANS_LEVEL_DEFAULT;
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141 int ipsec_esp_network_default_level = IPSEC_ESP_NETWORK_LEVEL_DEFAULT;
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142
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143 /* Keep track of memory used for reassembly */
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144 int ip_maxqueue = 300;
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145 int ip_frags = 0;
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146
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147 /* from in_pcb.c */
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148 extern int ipport_firstauto;
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149 extern int ipport_lastauto;
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150 extern int ipport_hifirstauto;
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151 extern int ipport_hilastauto;
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152 extern struct baddynamicports baddynamicports;
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153
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154 extern struct domain inetdomain;
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155 extern struct protosw inetsw[];
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156 u_char ip_protox[IPPROTO_MAX];
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157 int ipqmaxlen = IFQ_MAXLEN;
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158 struct in_ifaddrhead in_ifaddr;
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159 struct ifqueue ipintrq;
208
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160 struct ipstat ipstat;
97
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161 #if defined(IPFILTER) || defined(IPFILTER_LKM)
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162 int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int,
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163 struct mbuf **));
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164 #endif
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165
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166 int ipq_locked;
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167 static __inline int ipq_lock_try __P((void));
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168 static __inline void ipq_unlock __P((void));
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169
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170 static __inline int
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171 ipq_lock_try()
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172 {
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173 int s;
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174
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175 s = splimp();
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176 if (ipq_locked) {
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177 splx(s);
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178 return (0);
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179 }
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180 ipq_locked = 1;
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181 splx(s);
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182 return (1);
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183 }
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184
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185 #define ipq_lock() ipq_lock_try()
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186
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187 static __inline void
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188 ipq_unlock()
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189 {
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190 int s;
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191
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192 s = splimp();
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193 ipq_locked = 0;
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194 splx(s);
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195 }
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196
208
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197 #if 0 // Now in common layer
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198
115
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199 static char *ui8tod( cyg_uint8 n, char *p )
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200 {
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201 if( n > 99 ) *p++ = (n/100) + '0';
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202 if( n > 9 ) *p++ = ((n/10)%10) + '0';
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203 *p++ = (n%10) + '0';
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204 return p;
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205 }
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206
97
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207 char *
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208 inet_ntoa(ina)
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209 struct in_addr ina;
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210 {
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211 static char buf[4*sizeof "123"];
115
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212 char *p = buf;
97
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213 unsigned char *ucp = (unsigned char *)&ina;
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214
115
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215 // sprintf(buf, "%d.%d.%d.%d", ucp[0] & 0xff, ucp[1] & 0xff,
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216 // ucp[2] & 0xff, ucp[3] & 0xff);
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217
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218 p = ui8tod( ucp[0] & 0xFF, p);
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219 *p++ = '.';
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220 p = ui8tod( ucp[1] & 0xFF, p);
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221 *p++ = '.';
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222 p = ui8tod( ucp[2] & 0xFF, p);
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223 *p++ = '.';
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224 p = ui8tod( ucp[3] & 0xFF, p);
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225 *p++ = '\0';
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226
97
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227 return (buf);
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228 }
208
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229 #endif
97
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230
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231 /*
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232 * We need to save the IP options in case a protocol wants to respond
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233 * to an incoming packet over the same route if the packet got here
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234 * using IP source routing. This allows connection establishment and
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235 * maintenance when the remote end is on a network that is not known
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236 * to us.
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237 */
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238 int ip_nhops = 0;
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239 static struct ip_srcrt {
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240 struct in_addr dst; /* final destination */
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241 char nop; /* one NOP to align */
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242 char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */
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243 struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
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244 } ip_srcrt;
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245
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246 static void save_rte __P((u_char *, struct in_addr));
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247 static int ip_weadvertise(u_int32_t);
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248
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249 /*
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250 * IP initialization: fill in IP protocol switch table.
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251 * All protocols not implemented in kernel go to raw IP protocol handler.
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252 */
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253 void
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254 ip_init()
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255 {
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256 register struct protosw *pr;
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257 register int i;
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258 const u_int16_t defbaddynamicports_tcp[] = DEFBADDYNAMICPORTS_TCP;
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259 const u_int16_t defbaddynamicports_udp[] = DEFBADDYNAMICPORTS_UDP;
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260
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261 pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW);
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262 if (pr == 0)
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263 panic("ip_init");
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264 for (i = 0; i < IPPROTO_MAX; i++)
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265 ip_protox[i] = pr - inetsw;
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266 for (pr = inetdomain.dom_protosw;
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267 pr < inetdomain.dom_protoswNPROTOSW; pr++)
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268 if (pr->pr_domain->dom_family == PF_INET &&
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269 pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
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270 ip_protox[pr->pr_protocol] = pr - inetsw;
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271 LIST_INIT(&ipq);
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272 ipintrq.ifq_maxlen = ipqmaxlen;
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273 TAILQ_INIT(&in_ifaddr);
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274
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275 /* Fill in list of ports not to allocate dynamically. */
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276 bzero((void *)&baddynamicports, sizeof(baddynamicports));
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277 for (i = 0; defbaddynamicports_tcp[i] != 0; i++)
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278 DP_SET(baddynamicports.tcp, defbaddynamicports_tcp[i]);
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279 for (i = 0; defbaddynamicports_udp[i] != 0; i++)
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280 DP_SET(baddynamicports.udp, defbaddynamicports_tcp[i]);
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281 }
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282
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283 struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET };
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284 struct route ipforward_rt;
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285
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286 void
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287 ipintr()
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288 {
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289 register struct mbuf *m;
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290 int s;
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291
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292 if (needqueuedrain)
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293 m_reclaim();
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294
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295 while (1) {
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jlarmour
parents:
diff changeset
296 /*
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jlarmour
parents:
diff changeset
297 * Get next datagram off input queue and get IP header
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parents:
diff changeset
298 * in first mbuf.
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parents:
diff changeset
299 */
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parents:
diff changeset
300 s = splimp();
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parents:
diff changeset
301 IF_DEQUEUE(&ipintrq, m);
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jlarmour
parents:
diff changeset
302 splx(s);
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jlarmour
parents:
diff changeset
303 if (m == 0)
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jlarmour
parents:
diff changeset
304 return;
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jlarmour
parents:
diff changeset
305 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
306 if ((m->m_flags & M_PKTHDR) == 0)
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jlarmour
parents:
diff changeset
307 panic("ipintr no HDR");
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jlarmour
parents:
diff changeset
308 #endif
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jlarmour
parents:
diff changeset
309 ipv4_input(m, 0, NULL, 0);
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jlarmour
parents:
diff changeset
310 }
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jlarmour
parents:
diff changeset
311 }
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jlarmour
parents:
diff changeset
312
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
313 /*
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jlarmour
parents:
diff changeset
314 * Ip input routine. Checksum and byte swap header. If fragmented
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jlarmour
parents:
diff changeset
315 * try to reassemble. Process options. Pass to next level.
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jlarmour
parents:
diff changeset
316 */
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jlarmour
parents:
diff changeset
317 void
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jlarmour
parents:
diff changeset
318 ipv4_input(struct mbuf *m, ...)
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jlarmour
parents:
diff changeset
319 {
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jlarmour
parents:
diff changeset
320 register struct ip *ip;
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jlarmour
parents:
diff changeset
321 register struct ipq *fp;
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jlarmour
parents:
diff changeset
322 struct in_ifaddr *ia;
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jlarmour
parents:
diff changeset
323 struct ipqent *ipqe;
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jlarmour
parents:
diff changeset
324 int hlen, mff;
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parents:
diff changeset
325 va_list ap;
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jlarmour
parents:
diff changeset
326 int extra;
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jlarmour
parents:
diff changeset
327
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parents:
diff changeset
328 va_start(ap, m);
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diff changeset
329 extra = va_arg(ap, int);
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jlarmour
parents:
diff changeset
330 va_end(ap);
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jlarmour
parents:
diff changeset
331
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jlarmour
parents:
diff changeset
332 if (extra) {
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jlarmour
parents:
diff changeset
333 struct mbuf *newpacket;
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parents:
diff changeset
334
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diff changeset
335 if (!(newpacket = m_split(m, extra, M_NOWAIT))) {
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parents:
diff changeset
336 m_freem(m);
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jlarmour
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diff changeset
337 return;
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jlarmour
parents:
diff changeset
338 }
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diff changeset
339
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diff changeset
340 newpacket->m_flags |= m->m_flags;
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diff changeset
341 m_freem(m);
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diff changeset
342 m = newpacket;
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diff changeset
343 extra = 0;
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diff changeset
344 }
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diff changeset
345
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
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parents:
diff changeset
346 /*
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jlarmour
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diff changeset
347 * If no IP addresses have been set yet but the interfaces
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parents:
diff changeset
348 * are receiving, can't do anything with incoming packets yet.
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diff changeset
349 */
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diff changeset
350 if (in_ifaddr.tqh_first == 0)
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diff changeset
351 goto bad;
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diff changeset
352 ipstat.ips_total++;
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diff changeset
353 if (m->m_len < sizeof (struct ip) &&
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diff changeset
354 (m = m_pullup(m, sizeof (struct ip))) == 0) {
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diff changeset
355 ipstat.ips_toosmall++;
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parents:
diff changeset
356 return;
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diff changeset
357 }
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diff changeset
358 ip = mtod(m, struct ip *);
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diff changeset
359 if (ip->ip_v != IPVERSION) {
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diff changeset
360 ipstat.ips_badvers++;
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diff changeset
361 goto bad;
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jlarmour
parents:
diff changeset
362 }
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diff changeset
363 hlen = ip->ip_hl << 2;
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jlarmour
parents:
diff changeset
364 if (hlen < sizeof(struct ip)) { /* minimum header length */
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diff changeset
365 ipstat.ips_badhlen++;
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diff changeset
366 goto bad;
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jlarmour
parents:
diff changeset
367 }
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jlarmour
parents:
diff changeset
368 if (hlen > m->m_len) {
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jlarmour
parents:
diff changeset
369 if ((m = m_pullup(m, hlen)) == 0) {
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parents:
diff changeset
370 ipstat.ips_badhlen++;
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jlarmour
parents:
diff changeset
371 return;
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jlarmour
parents:
diff changeset
372 }
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diff changeset
373 ip = mtod(m, struct ip *);
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jlarmour
parents:
diff changeset
374 }
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jlarmour
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diff changeset
375 if ((ip->ip_sum = in_cksum(m, hlen)) != 0) {
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jlarmour
parents:
diff changeset
376 ipstat.ips_badsum++;
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jlarmour
parents:
diff changeset
377 goto bad;
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jlarmour
parents:
diff changeset
378 }
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jlarmour
parents:
diff changeset
379
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
380 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
381 * Convert fields to host representation.
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jlarmour
parents:
diff changeset
382 */
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jlarmour
parents:
diff changeset
383 NTOHS(ip->ip_len);
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jlarmour
parents:
diff changeset
384 if (ip->ip_len < hlen) {
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jlarmour
parents:
diff changeset
385 ipstat.ips_badlen++;
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jlarmour
parents:
diff changeset
386 goto bad;
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jlarmour
parents:
diff changeset
387 }
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jlarmour
parents:
diff changeset
388 NTOHS(ip->ip_id);
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jlarmour
parents:
diff changeset
389 NTOHS(ip->ip_off);
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jlarmour
parents:
diff changeset
390
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
391 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
392 * Check that the amount of data in the buffers
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
393 * is as at least much as the IP header would have us expect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
394 * Trim mbufs if longer than we expect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
395 * Drop packet if shorter than we expect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
396 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
397 if (m->m_pkthdr.len < ip->ip_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
398 ipstat.ips_tooshort++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
399 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
400 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
401 if (m->m_pkthdr.len > ip->ip_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
402 if (m->m_len == m->m_pkthdr.len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
403 m->m_len = ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
404 m->m_pkthdr.len = ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
405 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
406 m_adj(m, ip->ip_len - m->m_pkthdr.len);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
407 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
408
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
409 #if defined(IPFILTER) || defined(IPFILTER_LKM)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
410 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
411 * Check if we want to allow this packet to be processed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
412 * Consider it to be bad if not.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
413 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
414 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
415 struct mbuf *m0 = m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
416 if (fr_checkp && (*fr_checkp)(ip, hlen, m->m_pkthdr.rcvif, 0, &m0))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
417 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
418 ip = mtod(m = m0, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
419 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
420 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
421
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
422 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
423 * Process options and, if not destined for us,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
424 * ship it on. ip_dooptions returns 1 when an
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
425 * error was detected (causing an icmp message
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
426 * to be sent and the original packet to be freed).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
427 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
428 ip_nhops = 0; /* for source routed packets */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
429 if (hlen > sizeof (struct ip) && ip_dooptions(m))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
430 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
431
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
432 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
433 * Check our list of addresses, to see if the packet is for us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
434 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
435 if ((ia = in_iawithaddr(ip->ip_dst, m)) != NULL &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
436 (ia->ia_ifp->if_flags & IFF_UP))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
437 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
438
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
439 if (IN_MULTICAST(ip->ip_dst.s_addr)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
440 struct in_multi *inm;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
441 #ifdef MROUTING
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
442 extern struct socket *ip_mrouter;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
443
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
444 if (m->m_flags & M_EXT) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
445 if ((m = m_pullup(m, hlen)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
446 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
447 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
448 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
449 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
450 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
451
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
452 if (ip_mrouter) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
453 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
454 * If we are acting as a multicast router, all
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
455 * incoming multicast packets are passed to the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
456 * kernel-level multicast forwarding function.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
457 * The packet is returned (relatively) intact; if
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
458 * ip_mforward() returns a non-zero value, the packet
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
459 * must be discarded, else it may be accepted below.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
460 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
461 * (The IP ident field is put in the same byte order
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
462 * as expected when ip_mforward() is called from
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
463 * ip_output().)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
464 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
465 ip->ip_id = htons(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
466 if (ip_mforward(m, m->m_pkthdr.rcvif) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
467 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
468 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
469 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
470 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
471 ip->ip_id = ntohs(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
472
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
473 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
474 * The process-level routing demon needs to receive
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
475 * all multicast IGMP packets, whether or not this
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
476 * host belongs to their destination groups.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
477 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
478 if (ip->ip_p == IPPROTO_IGMP)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
479 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
480 ipstat.ips_forward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
481 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
482 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
483 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
484 * See if we belong to the destination multicast group on the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
485 * arrival interface.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
486 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
487 IN_LOOKUP_MULTI(ip->ip_dst, m->m_pkthdr.rcvif, inm);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
488 if (inm == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
489 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
490 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
491 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
492 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
493 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
494 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
495 if (ip->ip_dst.s_addr == INADDR_BROADCAST ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
496 ip->ip_dst.s_addr == INADDR_ANY)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
497 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
498
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
499 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
500 * Not for us; forward if possible and desirable.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
501 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
502 if (ipforwarding == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
503 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
504 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
505 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
506 ip_forward(m, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
507 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
508
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
509 ours:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
510 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
511 * If offset or IP_MF are set, must reassemble.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
512 * Otherwise, nothing need be done.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
513 * (We could look in the reassembly queue to see
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
514 * if the packet was previously fragmented,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
515 * but it's not worth the time; just let them time out.)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
516 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
517 if (ip->ip_off &~ (IP_DF | IP_RF)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
518 if (m->m_flags & M_EXT) { /* XXX */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
519 if ((m = m_pullup(m, hlen)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
520 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
521 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
522 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
523 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
524 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
525
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
526 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
527 * Look for queue of fragments
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
528 * of this datagram.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
529 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
530 ipq_lock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
531 for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
532 if (ip->ip_id == fp->ipq_id &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
533 ip->ip_src.s_addr == fp->ipq_src.s_addr &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
534 ip->ip_dst.s_addr == fp->ipq_dst.s_addr &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
535 ip->ip_p == fp->ipq_p)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
536 goto found;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
537 fp = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
538 found:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
539
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
540 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
541 * Adjust ip_len to not reflect header,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
542 * set ipqe_mff if more fragments are expected,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
543 * convert offset of this to bytes.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
544 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
545 ip->ip_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
546 mff = (ip->ip_off & IP_MF) != 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
547 if (mff) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
548 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
549 * Make sure that fragments have a data length
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
550 * that's a non-zero multiple of 8 bytes.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
551 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
552 if (ip->ip_len == 0 || (ip->ip_len & 0x7) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
553 ipstat.ips_badfrags++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
554 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
555 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
556 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
557 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
558 ip->ip_off <<= 3;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
559
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
560 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
561 * If datagram marked as having more fragments
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
562 * or if this is not the first fragment,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
563 * attempt reassembly; if it succeeds, proceed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
564 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
565 if (mff || ip->ip_off) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
566 ipstat.ips_fragments++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
567 if (ip_frags + 1 > ip_maxqueue) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
568 ip_flush();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
569 ipstat.ips_rcvmemdrop++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
570 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
571 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
572 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
573
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
574 MALLOC(ipqe, struct ipqent *, sizeof (struct ipqent),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
575 M_IPQ, M_NOWAIT);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
576 if (ipqe == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
577 ipstat.ips_rcvmemdrop++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
578 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
579 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
580 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
581 ip_frags++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
582 ipqe->ipqe_mff = mff;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
583 ipqe->ipqe_ip = ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
584 ip = ip_reass(ipqe, fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
585 if (ip == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
586 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
587 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
588 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
589 ipstat.ips_reassembled++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
590 m = dtom(ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
591 hlen = ip->ip_hl << 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
592 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
593 if (fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
594 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
595 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
596 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
597 ip->ip_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
598
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
599 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
600 * Switch out to protocol's input routine.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
601 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
602 ipstat.ips_delivered++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
603 (*inetsw[ip_protox[ip->ip_p]].pr_input)(m, hlen, NULL, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
604 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
605 bad:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
606 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
607 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
608
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
609 struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
610 in_iawithaddr(ina, m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
611 struct in_addr ina;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
612 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
613 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
614 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
615
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
616 for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
617 if ((ina.s_addr == ia->ia_addr.sin_addr.s_addr) ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
618 ((ia->ia_ifp->if_flags & (IFF_LOOPBACK|IFF_LINK1)) ==
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
619 (IFF_LOOPBACK|IFF_LINK1) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
620 ia->ia_subnet == (ina.s_addr & ia->ia_subnetmask)))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
621 return ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
622 if (m && ((ip_directedbcast == 0) || (ip_directedbcast &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
623 ia->ia_ifp == m->m_pkthdr.rcvif)) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
624 (ia->ia_ifp->if_flags & IFF_BROADCAST)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
625 if (ina.s_addr == ia->ia_broadaddr.sin_addr.s_addr ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
626 ina.s_addr == ia->ia_netbroadcast.s_addr ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
627 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
628 * Look for all-0's host part (old broadcast addr),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
629 * either for subnet or net.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
630 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
631 ina.s_addr == ia->ia_subnet ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
632 ina.s_addr == ia->ia_net) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
633 /* Make sure M_BCAST is set */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
634 m->m_flags |= M_BCAST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
635 return ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
636 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
637 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
638 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
639
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
640 return NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
641 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
642
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
643 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
644 * Take incoming datagram fragment and try to
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
645 * reassemble it into whole datagram. If a chain for
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
646 * reassembly of this datagram already exists, then it
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
647 * is given as fp; otherwise have to make a chain.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
648 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
649 struct ip *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
650 ip_reass(ipqe, fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
651 register struct ipqent *ipqe;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
652 register struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
653 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
654 register struct mbuf *m = dtom(ipqe->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
655 register struct ipqent *nq, *p, *q;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
656 struct ip *ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
657 struct mbuf *t;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
658 int hlen = ipqe->ipqe_ip->ip_hl << 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
659 int i, next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
660
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
661 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
662 * Presence of header sizes in mbufs
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
663 * would confuse code below.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
664 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
665 m->m_data += hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
666 m->m_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
667
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
668 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
669 * If first fragment to arrive, create a reassembly queue.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
670 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
671 if (fp == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
672 if ((t = m_get(M_DONTWAIT, MT_FTABLE)) == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
673 goto dropfrag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
674 fp = mtod(t, struct ipq *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
675 LIST_INSERT_HEAD(&ipq, fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
676 fp->ipq_ttl = IPFRAGTTL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
677 fp->ipq_p = ipqe->ipqe_ip->ip_p;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
678 fp->ipq_id = ipqe->ipqe_ip->ip_id;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
679 LIST_INIT(&fp->ipq_fragq);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
680 fp->ipq_src = ipqe->ipqe_ip->ip_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
681 fp->ipq_dst = ipqe->ipqe_ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
682 p = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
683 goto insert;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
684 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
685
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
686 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
687 * Find a segment which begins after this one does.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
688 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
689 for (p = NULL, q = fp->ipq_fragq.lh_first; q != NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
690 p = q, q = q->ipqe_q.le_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
691 if (q->ipqe_ip->ip_off > ipqe->ipqe_ip->ip_off)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
692 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
693
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
694 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
695 * If there is a preceding segment, it may provide some of
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
696 * our data already. If so, drop the data from the incoming
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
697 * segment. If it provides all of our data, drop us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
698 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
699 if (p != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
700 i = p->ipqe_ip->ip_off + p->ipqe_ip->ip_len -
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
701 ipqe->ipqe_ip->ip_off;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
702 if (i > 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
703 if (i >= ipqe->ipqe_ip->ip_len)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
704 goto dropfrag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
705 m_adj(dtom(ipqe->ipqe_ip), i);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
706 ipqe->ipqe_ip->ip_off += i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
707 ipqe->ipqe_ip->ip_len -= i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
708 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
709 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
710
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
711 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
712 * While we overlap succeeding segments trim them or,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
713 * if they are completely covered, dequeue them.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
714 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
715 for (; q != NULL && ipqe->ipqe_ip->ip_off + ipqe->ipqe_ip->ip_len >
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
716 q->ipqe_ip->ip_off; q = nq) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
717 i = (ipqe->ipqe_ip->ip_off + ipqe->ipqe_ip->ip_len) -
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
718 q->ipqe_ip->ip_off;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
719 if (i < q->ipqe_ip->ip_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
720 q->ipqe_ip->ip_len -= i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
721 q->ipqe_ip->ip_off += i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
722 m_adj(dtom(q->ipqe_ip), i);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
723 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
724 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
725 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
726 m_freem(dtom(q->ipqe_ip));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
727 LIST_REMOVE(q, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
728 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
729 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
730 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
731
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
732 insert:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
733 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
734 * Stick new segment in its place;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
735 * check for complete reassembly.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
736 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
737 if (p == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
738 LIST_INSERT_HEAD(&fp->ipq_fragq, ipqe, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
739 } else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
740 LIST_INSERT_AFTER(p, ipqe, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
741 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
742 next = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
743 for (p = NULL, q = fp->ipq_fragq.lh_first; q != NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
744 p = q, q = q->ipqe_q.le_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
745 if (q->ipqe_ip->ip_off != next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
746 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
747 next += q->ipqe_ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
748 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
749 if (p->ipqe_mff)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
750 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
751
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
752 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
753 * Reassembly is complete. Check for a bogus message size and
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
754 * concatenate fragments.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
755 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
756 q = fp->ipq_fragq.lh_first;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
757 ip = q->ipqe_ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
758 if ((next + (ip->ip_hl << 2)) > IP_MAXPACKET) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
759 ipstat.ips_toolong++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
760 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
761 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
762 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
763 m = dtom(q->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
764 t = m->m_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
765 m->m_next = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
766 m_cat(m, t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
767 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
768 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
769 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
770 for (q = nq; q != NULL; q = nq) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
771 t = dtom(q->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
772 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
773 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
774 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
775 m_cat(m, t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
776 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
777
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
778 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
779 * Create header for new ip packet by
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
780 * modifying header of first packet;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
781 * dequeue and discard fragment reassembly header.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
782 * Make header visible.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
783 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
784 ip->ip_len = next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
785 ip->ip_ttl = 0; /* xxx */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
786 ip->ip_sum = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
787 ip->ip_src = fp->ipq_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
788 ip->ip_dst = fp->ipq_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
789 LIST_REMOVE(fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
790 (void) m_free(dtom(fp));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
791 m->m_len += (ip->ip_hl << 2);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
792 m->m_data -= (ip->ip_hl << 2);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
793 /* some debugging cruft by sklower, below, will go away soon */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
794 if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
795 register int plen = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
796 for (t = m; m; m = m->m_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
797 plen += m->m_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
798 t->m_pkthdr.len = plen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
799 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
800 return (ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
801
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
802 dropfrag:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
803 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
804 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
805 FREE(ipqe, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
806 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
807 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
808 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
809
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
810 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
811 * Free a fragment reassembly header and all
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
812 * associated datagrams.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
813 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
814 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
815 ip_freef(fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
816 struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
817 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
818 register struct ipqent *q, *p;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
819
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
820 for (q = fp->ipq_fragq.lh_first; q != NULL; q = p) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
821 p = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
822 m_freem(dtom(q->ipqe_ip));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
823 LIST_REMOVE(q, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
824 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
825 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
826 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
827 LIST_REMOVE(fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
828 (void) m_free(dtom(fp));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
829 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
830
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
831 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
832 * IP timer processing;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
833 * if a timer expires on a reassembly
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
834 * queue, discard it.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
835 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
836 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
837 ip_slowtimo()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
838 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
839 register struct ipq *fp, *nfp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
840 int s = splsoftnet();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
841
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
842 ipq_lock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
843 for (fp = ipq.lh_first; fp != NULL; fp = nfp) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
844 nfp = fp->ipq_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
845 if (--fp->ipq_ttl == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
846 ipstat.ips_fragtimeout++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
847 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
848 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
849 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
850 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
851 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
852 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
853
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
854 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
855 * Drain off all datagram fragments.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
856 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
857 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
858 ip_drain()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
859 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
860
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
861 if (ipq_lock_try() == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
862 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
863 while (ipq.lh_first != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
864 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
865 ip_freef(ipq.lh_first);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
866 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
867 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
868 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
869
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
870 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
871 * Flush a bunch of datagram fragments, till we are down to 75%.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
872 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
873 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
874 ip_flush()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
875 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
876 int max = 50;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
877
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
878 /* ipq already locked */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
879 while (ipq.lh_first != NULL && ip_frags > ip_maxqueue * 3 / 4 && --max) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
880 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
881 ip_freef(ipq.lh_first);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
882 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
883 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
884
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
885 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
886 * Do option processing on a datagram,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
887 * possibly discarding it if bad options are encountered,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
888 * or forwarding it if source-routed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
889 * Returns 1 if packet has been forwarded/freed,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
890 * 0 if the packet should be processed further.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
891 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
892 int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
893 ip_dooptions(m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
894 struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
895 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
896 register struct ip *ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
897 register u_char *cp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
898 register struct ip_timestamp *ipt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
899 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
900 int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
901 struct in_addr *sin, dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
902 n_time ntime;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
903
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
904 dst = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
905 cp = (u_char *)(ip + 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
906 cnt = (ip->ip_hl << 2) - sizeof (struct ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
907 for (; cnt > 0; cnt -= optlen, cp += optlen) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
908 opt = cp[IPOPT_OPTVAL];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
909 if (opt == IPOPT_EOL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
910 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
911 if (opt == IPOPT_NOP)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
912 optlen = 1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
913 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
914 optlen = cp[IPOPT_OLEN];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
915 if (optlen <= 0 || optlen > cnt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
916 code = &cp[IPOPT_OLEN] - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
917 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
918 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
919 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
920 switch (opt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
921
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
922 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
923 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
924
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
925 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
926 * Source routing with record.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
927 * Find interface with current destination address.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
928 * If none on this machine then drop if strictly routed,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
929 * or do nothing if loosely routed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
930 * Record interface address and bring up next address
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
931 * component. If strictly routed make sure next
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
932 * address is on directly accessible net.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
933 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
934 case IPOPT_LSRR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
935 case IPOPT_SSRR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
936 if (!ip_dosourceroute) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
937 #ifndef __ECOS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
938 char buf[4*sizeof "123"];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
939
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
940 strcpy(buf, inet_ntoa(ip->ip_dst));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
941 log(LOG_WARNING,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
942 "attempted source route from %s to %s\n",
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
943 inet_ntoa(ip->ip_src), buf);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
944 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
945 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
946 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
947 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
948 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
949 if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
950 code = &cp[IPOPT_OFFSET] - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
951 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
952 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
953 ipaddr.sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
954 ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr)));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
955 if (ia == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
956 if (opt == IPOPT_SSRR) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
957 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
958 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
959 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
960 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
961 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
962 * Loose routing, and not at next destination
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
963 * yet; nothing to do except forward.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
964 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
965 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
966 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
967 off--; /* 0 origin */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
968 if (off > optlen - sizeof(struct in_addr)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
969 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
970 * End of source route. Should be for us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
971 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
972 save_rte(cp, ip->ip_src);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
973 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
974 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
975
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
976 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
977 * locate outgoing interface
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
978 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
979 bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
980 sizeof(ipaddr.sin_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
981 if (opt == IPOPT_SSRR) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
982 #define INA struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
983 #define SA struct sockaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
984 if ((ia = (INA)ifa_ifwithdstaddr((SA)&ipaddr)) == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
985 ia = (INA)ifa_ifwithnet((SA)&ipaddr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
986 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
987 ia = ip_rtaddr(ipaddr.sin_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
988 if (ia == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
989 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
990 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
991 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
992 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
993 ip->ip_dst = ipaddr.sin_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
994 bcopy((caddr_t)&ia->ia_addr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
995 (caddr_t)(cp + off), sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
996 cp[IPOPT_OFFSET] += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
997 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
998 * Let ip_intr's mcast routing check handle mcast pkts
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
999 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1000 forward = !IN_MULTICAST(ip->ip_dst.s_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1001 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1002
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1003 case IPOPT_RR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1004 if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1005 code = &cp[IPOPT_OFFSET] - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1006 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1007 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1008
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1009 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1010 * If no space remains, ignore.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1011 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1012 off--; /* 0 origin */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1013 if (off > optlen - sizeof(struct in_addr))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1014 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1015 bcopy((caddr_t)(&ip->ip_dst), (caddr_t)&ipaddr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1016 sizeof(ipaddr.sin_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1017 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1018 * locate outgoing interface; if we're the destination,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1019 * use the incoming interface (should be same).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1020 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1021 if ((ia = (INA)ifa_ifwithaddr((SA)&ipaddr)) == 0 &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1022 (ia = ip_rtaddr(ipaddr.sin_addr)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1023 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1024 code = ICMP_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1025 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1026 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1027 bcopy((caddr_t)&ia->ia_addr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1028 (caddr_t)(cp + off), sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1029 cp[IPOPT_OFFSET] += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1030 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1031
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1032 case IPOPT_TS:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1033 code = cp - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1034 ipt = (struct ip_timestamp *)cp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1035 if (ipt->ipt_ptr < 5 || ipt->ipt_len < 5)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1036 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1037 if (ipt->ipt_ptr - 1 + sizeof(n_time) > ipt->ipt_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1038 if (++ipt->ipt_oflw == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1039 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1040 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1041 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1042 sin = (struct in_addr *)(cp + ipt->ipt_ptr - 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1043 switch (ipt->ipt_flg) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1044
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1045 case IPOPT_TS_TSONLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1046 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1047
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1048 case IPOPT_TS_TSANDADDR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1049 if (ipt->ipt_ptr - 1 + sizeof(n_time) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1050 sizeof(struct in_addr) > ipt->ipt_len)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1051 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1052 ipaddr.sin_addr = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1053 ia = (INA)ifaof_ifpforaddr((SA)&ipaddr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1054 m->m_pkthdr.rcvif);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1055 if (ia == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1056 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1057 bcopy((caddr_t)&ia->ia_addr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1058 (caddr_t)sin, sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1059 ipt->ipt_ptr += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1060 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1061
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1062 case IPOPT_TS_PRESPEC:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1063 if (ipt->ipt_ptr - 1 + sizeof(n_time) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1064 sizeof(struct in_addr) > ipt->ipt_len)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1065 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1066 bcopy((caddr_t)sin, (caddr_t)&ipaddr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1067 sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1068 if (ifa_ifwithaddr((SA)&ipaddr) == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1069 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1070 ipt->ipt_ptr += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1071 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1072
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1073 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1074 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1075 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1076 ntime = iptime();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1077 bcopy((caddr_t)&ntime, (caddr_t)cp + ipt->ipt_ptr - 1,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1078 sizeof(n_time));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1079 ipt->ipt_ptr += sizeof(n_time);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1080 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1081 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1082 if (forward && ipforwarding) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1083 ip_forward(m, 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1084 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1085 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1086 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1087 bad:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1088 ip->ip_len -= ip->ip_hl << 2; /* XXX icmp_error adds in hdr length */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1089 HTONS(ip->ip_len); /* XXX because ip_input changed these three */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1090 HTONS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1091 HTONS(ip->ip_off);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1092 icmp_error(m, type, code, 0, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1093 ipstat.ips_badoptions++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1094 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1095 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1096
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1097 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1098 * Given address of next destination (final or next hop),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1099 * return internet address info of interface to be used to get there.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1100 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1101 struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1102 ip_rtaddr(dst)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1103 struct in_addr dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1104 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1105 register struct sockaddr_in *sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1106
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1107 sin = satosin(&ipforward_rt.ro_dst);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1108
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1109 if (ipforward_rt.ro_rt == 0 || dst.s_addr != sin->sin_addr.s_addr) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1110 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1111 RTFREE(ipforward_rt.ro_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1112 ipforward_rt.ro_rt = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1113 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1114 sin->sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1115 sin->sin_len = sizeof(*sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1116 sin->sin_addr = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1117
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1118 rtalloc(&ipforward_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1119 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1120 if (ipforward_rt.ro_rt == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1121 return ((struct in_ifaddr *)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1122 return (ifatoia(ipforward_rt.ro_rt->rt_ifa));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1123 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1124
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1125 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1126 * Save incoming source route for use in replies,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1127 * to be picked up later by ip_srcroute if the receiver is interested.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1128 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1129 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1130 save_rte(option, dst)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1131 u_char *option;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1132 struct in_addr dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1133 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1134 unsigned olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1135
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1136 olen = option[IPOPT_OLEN];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1137 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1138 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1139 printf("save_rte: olen %d\n", olen);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1140 #endif /* 0 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1141 if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst)))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1142 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1143 bcopy((caddr_t)option, (caddr_t)ip_srcrt.srcopt, olen);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1144 ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1145 ip_srcrt.dst = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1146 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1147
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1148 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1149 * Check whether we do proxy ARP for this address and we point to ourselves.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1150 * Code shamelessly copied from arplookup().
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1151 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1152 static int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1153 ip_weadvertise(addr)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1154 u_int32_t addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1155 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1156 register struct rtentry *rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1157 register struct ifnet *ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1158 register struct ifaddr *ifa;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1159 struct sockaddr_inarp sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1160
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1161 sin.sin_len = sizeof(sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1162 sin.sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1163 sin.sin_addr.s_addr = addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1164 sin.sin_other = SIN_PROXY;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1165 rt = rtalloc1(sintosa(&sin), 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1166 if (rt == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1167 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1168
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1169 RTFREE(rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1170
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1171 if ((rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1172 rt->rt_gateway->sa_family != AF_LINK)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1173 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1174
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1175 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1176 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1177 ifa = ifa->ifa_list.tqe_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1178 if (ifa->ifa_addr->sa_family != rt->rt_gateway->sa_family)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1179 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1180
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1181 if (!bcmp(LLADDR((struct sockaddr_dl *)ifa->ifa_addr),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1182 LLADDR((struct sockaddr_dl *)rt->rt_gateway),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1183 ETHER_ADDR_LEN))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1184 return 1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1185 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1186
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1187 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1188 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1189
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1190 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1191 * Retrieve incoming source route for use in replies,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1192 * in the same form used by setsockopt.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1193 * The first hop is placed before the options, will be removed later.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1194 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1195 struct mbuf *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1196 ip_srcroute()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1197 {
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jlarmour
parents:
diff changeset
1198 register struct in_addr *p, *q;
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jlarmour
parents:
diff changeset
1199 register struct mbuf *m;
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jlarmour
parents:
diff changeset
1200
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1201 if (ip_nhops == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1202 return ((struct mbuf *)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1203 m = m_get(M_DONTWAIT, MT_SOOPTS);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1204 if (m == 0)
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jlarmour
parents:
diff changeset
1205 return ((struct mbuf *)0);
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jlarmour
parents:
diff changeset
1206
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1207 #define OPTSIZ (sizeof(ip_srcrt.nop) + sizeof(ip_srcrt.srcopt))
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jlarmour
parents:
diff changeset
1208
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1209 /* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1210 m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1211 OPTSIZ;
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jlarmour
parents:
diff changeset
1212 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1213 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1214 printf("ip_srcroute: nhops %d mlen %d", ip_nhops, m->m_len);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1215 #endif
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jlarmour
parents:
diff changeset
1216
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1217 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1218 * First save first hop for return route
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jlarmour
parents:
diff changeset
1219 */
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jlarmour
parents:
diff changeset
1220 p = &ip_srcrt.route[ip_nhops - 1];
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jlarmour
parents:
diff changeset
1221 *(mtod(m, struct in_addr *)) = *p--;
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jlarmour
parents:
diff changeset
1222 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1223 if (ipprintfs)
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jlarmour
parents:
diff changeset
1224 printf(" hops %x", ntohl(mtod(m, struct in_addr *)->s_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1225 #endif
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jlarmour
parents:
diff changeset
1226
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1227 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1228 * Copy option fields and padding (nop) to mbuf.
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jlarmour
parents:
diff changeset
1229 */
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jlarmour
parents:
diff changeset
1230 ip_srcrt.nop = IPOPT_NOP;
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jlarmour
parents:
diff changeset
1231 ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF;
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jlarmour
parents:
diff changeset
1232 bcopy((caddr_t)&ip_srcrt.nop,
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jlarmour
parents:
diff changeset
1233 mtod(m, caddr_t) + sizeof(struct in_addr), OPTSIZ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1234 q = (struct in_addr *)(mtod(m, caddr_t) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1235 sizeof(struct in_addr) + OPTSIZ);
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jlarmour
parents:
diff changeset
1236 #undef OPTSIZ
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jlarmour
parents:
diff changeset
1237 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1238 * Record return path as an IP source route,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1239 * reversing the path (pointers are now aligned).
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jlarmour
parents:
diff changeset
1240 */
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jlarmour
parents:
diff changeset
1241 while (p >= ip_srcrt.route) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1242 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1243 if (ipprintfs)
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jlarmour
parents:
diff changeset
1244 printf(" %x", ntohl(q->s_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1245 #endif
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jlarmour
parents:
diff changeset
1246 *q++ = *p--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1247 }
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jlarmour
parents:
diff changeset
1248 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1249 * Last hop goes to final destination.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1250 */
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jlarmour
parents:
diff changeset
1251 *q = ip_srcrt.dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1252 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1253 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1254 printf(" %x\n", ntohl(q->s_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1255 #endif
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jlarmour
parents:
diff changeset
1256 return (m);
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jlarmour
parents:
diff changeset
1257 }
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jlarmour
parents:
diff changeset
1258
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1259 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1260 * Strip out IP options, at higher
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1261 * level protocol in the kernel.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1262 * Second argument is buffer to which options
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1263 * will be moved, and return value is their length.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1264 * XXX should be deleted; last arg currently ignored.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1265 */
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jlarmour
parents:
diff changeset
1266 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1267 ip_stripoptions(m, mopt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1268 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1269 struct mbuf *mopt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1270 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1271 register int i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1272 struct ip *ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1273 register caddr_t opts;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1274 int olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1275
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1276 olen = (ip->ip_hl<<2) - sizeof (struct ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1277 opts = (caddr_t)(ip + 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1278 i = m->m_len - (sizeof (struct ip) + olen);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1279 bcopy(opts + olen, opts, (unsigned)i);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1280 m->m_len -= olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1281 if (m->m_flags & M_PKTHDR)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1282 m->m_pkthdr.len -= olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1283 ip->ip_hl = sizeof(struct ip) >> 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1284 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1285
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1286 int inetctlerrmap[PRC_NCMDS] = {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1287 0, 0, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1288 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1289 EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1290 EMSGSIZE, EHOSTUNREACH, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1291 0, 0, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1292 ENOPROTOOPT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1293 };
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1294
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1295 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1296 * Forward a packet. If some error occurs return the sender
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1297 * an icmp packet. Note we can't always generate a meaningful
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1298 * icmp message because icmp doesn't have a large enough repertoire
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1299 * of codes and types.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1300 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1301 * If not forwarding, just drop the packet. This could be confusing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1302 * if ipforwarding was zero but some routing protocol was advancing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1303 * us as a gateway to somewhere. However, we must let the routing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1304 * protocol deal with that.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1305 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1306 * The srcrt parameter indicates whether the packet is being forwarded
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1307 * via a source route.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1308 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1309 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1310 ip_forward(m, srcrt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1311 struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1312 int srcrt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1313 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1314 register struct ip *ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1315 register struct sockaddr_in *sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1316 register struct rtentry *rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1317 int error, type = 0, code = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1318 struct mbuf *mcopy;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1319 n_long dest;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1320 struct ifnet *destifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1321 #if 0 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1322 struct ifnet dummyifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1323 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1324
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1325 dest = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1326 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1327 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1328 printf("forward: src %x dst %x ttl %x\n", ip->ip_src.s_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1329 ip->ip_dst.s_addr, ip->ip_ttl);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1330 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1331 if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1332 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1333 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1334 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1335 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1336 HTONS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1337 if (ip->ip_ttl <= IPTTLDEC) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1338 icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1339 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1340 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1341 ip->ip_ttl -= IPTTLDEC;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1342
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1343 sin = satosin(&ipforward_rt.ro_dst);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1344 if ((rt = ipforward_rt.ro_rt) == 0 ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1345 ip->ip_dst.s_addr != sin->sin_addr.s_addr) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1346 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1347 RTFREE(ipforward_rt.ro_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1348 ipforward_rt.ro_rt = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1349 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1350 sin->sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1351 sin->sin_len = sizeof(*sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1352 sin->sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1353
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1354 rtalloc(&ipforward_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1355 if (ipforward_rt.ro_rt == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1356 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, dest, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1357 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1358 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1359 rt = ipforward_rt.ro_rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1360 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1361
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1362 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1363 * Save at most 68 bytes of the packet in case
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1364 * we need to generate an ICMP message to the src.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1365 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1366 mcopy = m_copy(m, 0, imin((int)ip->ip_len, 68));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1367
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1368 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1369 * If forwarding packet using same interface that it came in on,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1370 * perhaps should send a redirect to sender to shortcut a hop.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1371 * Only send redirect if source is sending directly to us,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1372 * and if packet was not source routed (or has any options).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1373 * Also, don't send redirect if forwarding using a default route
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1374 * or a route modified by a redirect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1375 * Don't send redirect if we advertise destination's arp address
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1376 * as ours (proxy arp).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1377 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1378 if (rt->rt_ifp == m->m_pkthdr.rcvif &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1379 (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0 &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1380 satosin(rt_key(rt))->sin_addr.s_addr != 0 &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1381 ipsendredirects && !srcrt &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1382 !ip_weadvertise(satosin(rt_key(rt))->sin_addr.s_addr)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1383 if (rt->rt_ifa &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1384 (ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) ==
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1385 ifatoia(rt->rt_ifa)->ia_subnet) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1386 if (rt->rt_flags & RTF_GATEWAY)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1387 dest = satosin(rt->rt_gateway)->sin_addr.s_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1388 else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1389 dest = ip->ip_dst.s_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1390 /* Router requirements says to only send host redirects */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1391 type = ICMP_REDIRECT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1392 code = ICMP_REDIRECT_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1393 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1394 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1395 printf("redirect (%d) to %x\n", code, (u_int32_t)dest);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1396 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1397 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1398 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1399
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1400 #if 0 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1401 m->m_pkthdr.rcvif = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1402 #endif /*IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1403 error = ip_output(m, (struct mbuf *)0, &ipforward_rt,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1404 (IP_FORWARDING | (ip_directedbcast ? IP_ALLOWBROADCAST : 0)),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1405 0, NULL, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1406 if (error)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1407 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1408 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1409 ipstat.ips_forward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1410 if (type)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1411 ipstat.ips_redirectsent++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1412 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1413 if (mcopy)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1414 m_freem(mcopy);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1415 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1416 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1417 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1418 if (mcopy == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1419 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1420 destifp = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1421
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1422 switch (error) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1423
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1424 case 0: /* forwarded, but need redirect */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1425 /* type, code set above */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1426 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1427
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1428 case ENETUNREACH: /* shouldn't happen, checked above */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1429 case EHOSTUNREACH:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1430 case ENETDOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1431 case EHOSTDOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1432 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1433 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1434 code = ICMP_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1435 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1436
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1437 case EMSGSIZE:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1438 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1439 code = ICMP_UNREACH_NEEDFRAG;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1440 #if 1 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1441 if (ipforward_rt.ro_rt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1442 destifp = ipforward_rt.ro_rt->rt_ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1443 #else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1444 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1445 * If the packet is routed over IPsec tunnel, tell the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1446 * originator the tunnel MTU.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1447 * tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1448 * XXX quickhack!!!
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1449 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1450 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1451 struct secpolicy *sp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1452 int ipsecerror;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1453 int ipsechdr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1454 struct route *ro;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1455
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1456 sp = ipsec4_getpolicybyaddr(mcopy,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1457 IP_FORWARDING,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1458 &ipsecerror);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1459
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1460 if (sp == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1461 destifp = ipforward_rt.ro_rt->rt_ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1462 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1463 /* count IPsec header size */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1464 ipsechdr = ipsec4_hdrsiz(mcopy, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1465
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1466 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1467 * find the correct route for outer IPv4
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1468 * header, compute tunnel MTU.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1469 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1470 * XXX BUG ALERT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1471 * The "dummyifp" code relies upon the fact
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1472 * that icmp_error() touches only ifp->if_mtu.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1473 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1474 /*XXX*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1475 destifp = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1476 if (sp->req != NULL
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1477 && sp->req->sa != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1478 ro = &sp->req->sa->saidx->sa_route;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1479 if (ro->ro_rt && ro->ro_rt->rt_ifp) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1480 dummyifp.if_mtu =
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1481 ro->ro_rt->rt_ifp->if_mtu;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1482 dummyifp.if_mtu -= ipsechdr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1483 destifp = &dummyifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1484 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1485 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1486
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1487 key_freesp(sp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1488 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1489 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1490 #endif /*IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1491 ipstat.ips_cantfrag++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
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diff changeset
1492 break;
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diff changeset
1493
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1494 case ENOBUFS:
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diff changeset
1495 type = ICMP_SOURCEQUENCH;
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diff changeset
1496 code = 0;
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diff changeset
1497 break;
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1498 }
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1499
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diff changeset
1500 icmp_error(mcopy, type, code, dest, destifp);
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diff changeset
1501 }
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1502
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diff changeset
1503 #ifdef CYGPKG_NET_SYSCTL
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diff changeset
1504 int
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diff changeset
1505 ip_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
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diff changeset
1506 int *name;
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diff changeset
1507 u_int namelen;
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diff changeset
1508 void *oldp;
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diff changeset
1509 size_t *oldlenp;
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diff changeset
1510 void *newp;
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diff changeset
1511 size_t newlen;
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diff changeset
1512 {
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parents:
diff changeset
1513 /* All sysctl names at this level are terminal. */
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diff changeset
1514 if (namelen != 1)
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diff changeset
1515 return (ENOTDIR);
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diff changeset
1516
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diff changeset
1517 switch (name[0]) {
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diff changeset
1518 case IPCTL_FORWARDING:
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diff changeset
1519 return (sysctl_int(oldp, oldlenp, newp, newlen, &ipforwarding));
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diff changeset
1520 case IPCTL_SENDREDIRECTS:
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diff changeset
1521 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1522 &ipsendredirects));
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diff changeset
1523 case IPCTL_DEFTTL:
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diff changeset
1524 return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_defttl));
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diff changeset
1525 #ifdef notyet
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diff changeset
1526 case IPCTL_DEFMTU:
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diff changeset
1527 return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu));
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diff changeset
1528 #endif
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diff changeset
1529 case IPCTL_SOURCEROUTE:
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jlarmour
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diff changeset
1530 /*
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parents:
diff changeset
1531 * Don't allow this to change in a secure environment.
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diff changeset
1532 */
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diff changeset
1533 if (newp && securelevel > 0)
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diff changeset
1534 return (EPERM);
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diff changeset
1535 return (sysctl_int(oldp, oldlenp, newp, newlen,
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parents:
diff changeset
1536 &ip_dosourceroute));
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diff changeset
1537 case IPCTL_DIRECTEDBCAST:
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diff changeset
1538 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1539 &ip_directedbcast));
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diff changeset
1540 case IPCTL_IPPORT_FIRSTAUTO:
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diff changeset
1541 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1542 &ipport_firstauto));
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diff changeset
1543 case IPCTL_IPPORT_LASTAUTO:
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diff changeset
1544 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1545 &ipport_lastauto));
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diff changeset
1546 case IPCTL_IPPORT_HIFIRSTAUTO:
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diff changeset
1547 return (sysctl_int(oldp, oldlenp, newp, newlen,
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parents:
diff changeset
1548 &ipport_hifirstauto));
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diff changeset
1549 case IPCTL_IPPORT_HILASTAUTO:
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diff changeset
1550 return (sysctl_int(oldp, oldlenp, newp, newlen,
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parents:
diff changeset
1551 &ipport_hilastauto));
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diff changeset
1552 case IPCTL_IPPORT_MAXQUEUE:
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diff changeset
1553 return (sysctl_int(oldp, oldlenp, newp, newlen,
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parents:
diff changeset
1554 &ip_maxqueue));
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diff changeset
1555 case IPCTL_ENCDEBUG:
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diff changeset
1556 return (sysctl_int(oldp, oldlenp, newp, newlen, &encdebug));
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parents:
diff changeset
1557 default:
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diff changeset
1558 return (EOPNOTSUPP);
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diff changeset
1559 }
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parents:
diff changeset
1560 /* NOTREACHED */
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diff changeset
1561 }
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diff changeset
1562 #endif // CYGPKG_NET_SYSCTL