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annotate packages/net/tcpip/current/src/sys/netinet/ip_input.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 6ed91473a1cd
children 74dbf4c3f2e1
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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 //==========================================================================
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8 //####BSDCOPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 //
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12 // Portions of this software may have been derived from OpenBSD or other sources,
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13 // and are covered by the appropriate copyright disclaimers included herein.
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14 //
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15 // -------------------------------------------
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16 //
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17 //####BSDCOPYRIGHTEND####
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18 //==========================================================================
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19 //#####DESCRIPTIONBEGIN####
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20 //
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21 // Author(s): gthomas
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22 // Contributors: gthomas
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23 // Date: 2000-01-10
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24 // Purpose:
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25 // Description:
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26 //
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27 //
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28 //####DESCRIPTIONEND####
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29 //
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30 //==========================================================================
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31
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32
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33 /* $OpenBSD: ip_input.c,v 1.44 1999/12/08 06:50:20 itojun Exp $ */
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34 /* $NetBSD: ip_input.c,v 1.30 1996/03/16 23:53:58 christos Exp $ */
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35
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36 /*
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37 * Copyright (c) 1982, 1986, 1988, 1993
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38 * The Regents of the University of California. All rights reserved.
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39 *
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40 * Redistribution and use in source and binary forms, with or without
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41 * modification, are permitted provided that the following conditions
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42 * are met:
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43 * 1. Redistributions of source code must retain the above copyright
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44 * notice, this list of conditions and the following disclaimer.
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45 * 2. Redistributions in binary form must reproduce the above copyright
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46 * notice, this list of conditions and the following disclaimer in the
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47 * documentation and/or other materials provided with the distribution.
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48 * 3. All advertising materials mentioning features or use of this software
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49 * must display the following acknowledgement:
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50 * This product includes software developed by the University of
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51 * California, Berkeley and its contributors.
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52 * 4. Neither the name of the University nor the names of its contributors
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53 * may be used to endorse or promote products derived from this software
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54 * without specific prior written permission.
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55 *
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56 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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59 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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62 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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66 * SUCH DAMAGE.
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67 *
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68 * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
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69 */
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70
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71 #include <sys/param.h>
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72 #ifndef __ECOS
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73 #include <sys/systm.h>
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74 #endif
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75 #include <sys/malloc.h>
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76 #include <sys/mbuf.h>
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77 #include <sys/domain.h>
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78 #include <sys/protosw.h>
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79 #include <sys/socket.h>
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80 #include <sys/errno.h>
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81 #include <sys/time.h>
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82 #include <sys/kernel.h>
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83 #ifndef __ECOS
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84 #include <sys/syslog.h>
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85 #include <sys/proc.h>
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86
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87 #include <vm/vm.h>
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88 #include <sys/sysctl.h>
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89 #endif
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90
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91 #include <net/if.h>
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92 #include <net/if_dl.h>
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93 #include <net/route.h>
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94
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95 #include <netinet/in.h>
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96 #include <netinet/in_systm.h>
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97 #include <netinet/if_ether.h>
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98 #include <netinet/ip.h>
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99 #include <netinet/in_pcb.h>
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100 #include <netinet/in_var.h>
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101 #include <netinet/ip_var.h>
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102 #include <netinet/ip_icmp.h>
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103 #include <netinet/ip_ipsp.h>
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104
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105 #ifdef __ECOS
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106 #include <stdio.h> // for 'sprintf()'
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107 #endif
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108
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109 #ifndef IPFORWARDING
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110 #ifdef GATEWAY
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111 #define IPFORWARDING 1 /* forward IP packets not for us */
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112 #else /* GATEWAY */
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113 #define IPFORWARDING 0 /* don't forward IP packets not for us */
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114 #endif /* GATEWAY */
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115 #endif /* IPFORWARDING */
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116 #ifndef IPSENDREDIRECTS
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117 #define IPSENDREDIRECTS 1
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118 #endif
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119
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120 int encdebug = 0;
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121
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122 /*
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123 * Note: DIRECTED_BROADCAST is handled this way so that previous
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124 * configuration using this option will Just Work.
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125 */
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126 #ifndef IPDIRECTEDBCAST
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127 #ifdef DIRECTED_BROADCAST
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128 #define IPDIRECTEDBCAST 1
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129 #else
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130 #define IPDIRECTEDBCAST 0
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131 #endif /* DIRECTED_BROADCAST */
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132 #endif /* IPDIRECTEDBCAST */
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133 int ipforwarding = IPFORWARDING;
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134 int ipsendredirects = IPSENDREDIRECTS;
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135 int ip_dosourceroute = 0; /* no src-routing unless sysctl'd to enable */
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136 int ip_defttl = IPDEFTTL;
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137 int ip_directedbcast = IPDIRECTEDBCAST;
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138 #ifdef DIAGNOSTIC
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139 int ipprintfs = 0;
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140 #endif
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141
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142 int ipsec_auth_default_level = IPSEC_AUTH_LEVEL_DEFAULT;
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143 int ipsec_esp_trans_default_level = IPSEC_ESP_TRANS_LEVEL_DEFAULT;
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144 int ipsec_esp_network_default_level = IPSEC_ESP_NETWORK_LEVEL_DEFAULT;
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145
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146 /* Keep track of memory used for reassembly */
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147 int ip_maxqueue = 300;
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148 int ip_frags = 0;
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149
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150 /* from in_pcb.c */
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151 extern int ipport_firstauto;
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152 extern int ipport_lastauto;
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153 extern int ipport_hifirstauto;
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154 extern int ipport_hilastauto;
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155 extern struct baddynamicports baddynamicports;
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156
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157 extern struct domain inetdomain;
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158 extern struct protosw inetsw[];
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159 u_char ip_protox[IPPROTO_MAX];
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160 int ipqmaxlen = IFQ_MAXLEN;
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161 struct in_ifaddrhead in_ifaddr;
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162 struct ifqueue ipintrq;
208
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163 struct ipstat ipstat;
97
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164 #if defined(IPFILTER) || defined(IPFILTER_LKM)
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165 int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int,
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166 struct mbuf **));
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167 #endif
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168
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169 int ipq_locked;
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170 static __inline int ipq_lock_try __P((void));
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171 static __inline void ipq_unlock __P((void));
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172
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173 static __inline int
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174 ipq_lock_try()
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175 {
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176 int s;
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177
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178 s = splimp();
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179 if (ipq_locked) {
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180 splx(s);
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181 return (0);
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182 }
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183 ipq_locked = 1;
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184 splx(s);
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185 return (1);
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186 }
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187
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188 #define ipq_lock() ipq_lock_try()
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189
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190 static __inline void
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191 ipq_unlock()
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192 {
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193 int s;
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194
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195 s = splimp();
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196 ipq_locked = 0;
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197 splx(s);
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198 }
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199
208
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200 #if 0 // Now in common layer
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201
115
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202 static char *ui8tod( cyg_uint8 n, char *p )
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203 {
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204 if( n > 99 ) *p++ = (n/100) + '0';
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205 if( n > 9 ) *p++ = ((n/10)%10) + '0';
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206 *p++ = (n%10) + '0';
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207 return p;
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208 }
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209
97
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210 char *
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211 inet_ntoa(ina)
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212 struct in_addr ina;
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213 {
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214 static char buf[4*sizeof "123"];
115
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215 char *p = buf;
97
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216 unsigned char *ucp = (unsigned char *)&ina;
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217
115
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218 // sprintf(buf, "%d.%d.%d.%d", ucp[0] & 0xff, ucp[1] & 0xff,
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219 // ucp[2] & 0xff, ucp[3] & 0xff);
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220
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221 p = ui8tod( ucp[0] & 0xFF, p);
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222 *p++ = '.';
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223 p = ui8tod( ucp[1] & 0xFF, p);
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224 *p++ = '.';
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225 p = ui8tod( ucp[2] & 0xFF, p);
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226 *p++ = '.';
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227 p = ui8tod( ucp[3] & 0xFF, p);
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228 *p++ = '\0';
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229
97
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230 return (buf);
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231 }
208
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232 #endif
97
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233
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234 /*
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235 * We need to save the IP options in case a protocol wants to respond
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236 * to an incoming packet over the same route if the packet got here
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237 * using IP source routing. This allows connection establishment and
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238 * maintenance when the remote end is on a network that is not known
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239 * to us.
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240 */
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241 int ip_nhops = 0;
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242 static struct ip_srcrt {
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243 struct in_addr dst; /* final destination */
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244 char nop; /* one NOP to align */
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245 char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */
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246 struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
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247 } ip_srcrt;
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248
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249 static void save_rte __P((u_char *, struct in_addr));
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250 static int ip_weadvertise(u_int32_t);
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251
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252 /*
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253 * IP initialization: fill in IP protocol switch table.
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254 * All protocols not implemented in kernel go to raw IP protocol handler.
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255 */
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256 void
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257 ip_init()
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258 {
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259 register struct protosw *pr;
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260 register int i;
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261 const u_int16_t defbaddynamicports_tcp[] = DEFBADDYNAMICPORTS_TCP;
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262 const u_int16_t defbaddynamicports_udp[] = DEFBADDYNAMICPORTS_UDP;
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263
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264 pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW);
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265 if (pr == 0)
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266 panic("ip_init");
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267 for (i = 0; i < IPPROTO_MAX; i++)
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268 ip_protox[i] = pr - inetsw;
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269 for (pr = inetdomain.dom_protosw;
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270 pr < inetdomain.dom_protoswNPROTOSW; pr++)
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271 if (pr->pr_domain->dom_family == PF_INET &&
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272 pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
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273 ip_protox[pr->pr_protocol] = pr - inetsw;
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274 LIST_INIT(&ipq);
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275 ipintrq.ifq_maxlen = ipqmaxlen;
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276 TAILQ_INIT(&in_ifaddr);
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277
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278 /* Fill in list of ports not to allocate dynamically. */
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279 bzero((void *)&baddynamicports, sizeof(baddynamicports));
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280 for (i = 0; defbaddynamicports_tcp[i] != 0; i++)
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281 DP_SET(baddynamicports.tcp, defbaddynamicports_tcp[i]);
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282 for (i = 0; defbaddynamicports_udp[i] != 0; i++)
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283 DP_SET(baddynamicports.udp, defbaddynamicports_tcp[i]);
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284 }
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285
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286 struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET };
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287 struct route ipforward_rt;
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288
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289 void
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290 ipintr()
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291 {
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292 register struct mbuf *m;
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293 int s;
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294
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295 if (needqueuedrain)
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jlarmour
parents:
diff changeset
296 m_reclaim();
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jlarmour
parents:
diff changeset
297
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
298 while (1) {
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jlarmour
parents:
diff changeset
299 /*
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jlarmour
parents:
diff changeset
300 * Get next datagram off input queue and get IP header
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jlarmour
parents:
diff changeset
301 * in first mbuf.
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jlarmour
parents:
diff changeset
302 */
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jlarmour
parents:
diff changeset
303 s = splimp();
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jlarmour
parents:
diff changeset
304 IF_DEQUEUE(&ipintrq, m);
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jlarmour
parents:
diff changeset
305 splx(s);
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jlarmour
parents:
diff changeset
306 if (m == 0)
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jlarmour
parents:
diff changeset
307 return;
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jlarmour
parents:
diff changeset
308 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
309 if ((m->m_flags & M_PKTHDR) == 0)
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jlarmour
parents:
diff changeset
310 panic("ipintr no HDR");
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jlarmour
parents:
diff changeset
311 #endif
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jlarmour
parents:
diff changeset
312 ipv4_input(m, 0, NULL, 0);
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jlarmour
parents:
diff changeset
313 }
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jlarmour
parents:
diff changeset
314 }
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jlarmour
parents:
diff changeset
315
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
316 /*
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jlarmour
parents:
diff changeset
317 * Ip input routine. Checksum and byte swap header. If fragmented
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jlarmour
parents:
diff changeset
318 * try to reassemble. Process options. Pass to next level.
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jlarmour
parents:
diff changeset
319 */
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jlarmour
parents:
diff changeset
320 void
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jlarmour
parents:
diff changeset
321 ipv4_input(struct mbuf *m, ...)
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jlarmour
parents:
diff changeset
322 {
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jlarmour
parents:
diff changeset
323 register struct ip *ip;
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jlarmour
parents:
diff changeset
324 register struct ipq *fp;
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jlarmour
parents:
diff changeset
325 struct in_ifaddr *ia;
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jlarmour
parents:
diff changeset
326 struct ipqent *ipqe;
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jlarmour
parents:
diff changeset
327 int hlen, mff;
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jlarmour
parents:
diff changeset
328 va_list ap;
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jlarmour
parents:
diff changeset
329 int extra;
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jlarmour
parents:
diff changeset
330
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jlarmour
parents:
diff changeset
331 va_start(ap, m);
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jlarmour
parents:
diff changeset
332 extra = va_arg(ap, int);
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jlarmour
parents:
diff changeset
333 va_end(ap);
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jlarmour
parents:
diff changeset
334
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
335 if (extra) {
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jlarmour
parents:
diff changeset
336 struct mbuf *newpacket;
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jlarmour
parents:
diff changeset
337
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jlarmour
parents:
diff changeset
338 if (!(newpacket = m_split(m, extra, M_NOWAIT))) {
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jlarmour
parents:
diff changeset
339 m_freem(m);
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jlarmour
parents:
diff changeset
340 return;
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jlarmour
parents:
diff changeset
341 }
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jlarmour
parents:
diff changeset
342
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
343 newpacket->m_flags |= m->m_flags;
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parents:
diff changeset
344 m_freem(m);
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parents:
diff changeset
345 m = newpacket;
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diff changeset
346 extra = 0;
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parents:
diff changeset
347 }
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parents:
diff changeset
348
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
349 /*
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jlarmour
parents:
diff changeset
350 * If no IP addresses have been set yet but the interfaces
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jlarmour
parents:
diff changeset
351 * are receiving, can't do anything with incoming packets yet.
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parents:
diff changeset
352 */
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jlarmour
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diff changeset
353 if (in_ifaddr.tqh_first == 0)
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parents:
diff changeset
354 goto bad;
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jlarmour
parents:
diff changeset
355 ipstat.ips_total++;
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parents:
diff changeset
356 if (m->m_len < sizeof (struct ip) &&
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parents:
diff changeset
357 (m = m_pullup(m, sizeof (struct ip))) == 0) {
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parents:
diff changeset
358 ipstat.ips_toosmall++;
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jlarmour
parents:
diff changeset
359 return;
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jlarmour
parents:
diff changeset
360 }
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diff changeset
361 ip = mtod(m, struct ip *);
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jlarmour
parents:
diff changeset
362 if (ip->ip_v != IPVERSION) {
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jlarmour
parents:
diff changeset
363 ipstat.ips_badvers++;
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jlarmour
parents:
diff changeset
364 goto bad;
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jlarmour
parents:
diff changeset
365 }
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jlarmour
parents:
diff changeset
366 hlen = ip->ip_hl << 2;
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jlarmour
parents:
diff changeset
367 if (hlen < sizeof(struct ip)) { /* minimum header length */
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jlarmour
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diff changeset
368 ipstat.ips_badhlen++;
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jlarmour
parents:
diff changeset
369 goto bad;
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jlarmour
parents:
diff changeset
370 }
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jlarmour
parents:
diff changeset
371 if (hlen > m->m_len) {
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jlarmour
parents:
diff changeset
372 if ((m = m_pullup(m, hlen)) == 0) {
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jlarmour
parents:
diff changeset
373 ipstat.ips_badhlen++;
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jlarmour
parents:
diff changeset
374 return;
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jlarmour
parents:
diff changeset
375 }
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jlarmour
parents:
diff changeset
376 ip = mtod(m, struct ip *);
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jlarmour
parents:
diff changeset
377 }
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jlarmour
parents:
diff changeset
378 if ((ip->ip_sum = in_cksum(m, hlen)) != 0) {
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jlarmour
parents:
diff changeset
379 ipstat.ips_badsum++;
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jlarmour
parents:
diff changeset
380 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
381 }
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jlarmour
parents:
diff changeset
382
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
383 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
384 * Convert fields to host representation.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
385 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
386 NTOHS(ip->ip_len);
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jlarmour
parents:
diff changeset
387 if (ip->ip_len < hlen) {
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jlarmour
parents:
diff changeset
388 ipstat.ips_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
389 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
390 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
391 NTOHS(ip->ip_id);
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jlarmour
parents:
diff changeset
392 NTOHS(ip->ip_off);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
393
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
394 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
395 * 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
396 * 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
397 * 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
398 * 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
399 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
400 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
401 ipstat.ips_tooshort++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
402 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
403 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
404 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
405 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
406 m->m_len = ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
407 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
408 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
409 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
410 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
411
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
412 #if defined(IPFILTER) || defined(IPFILTER_LKM)
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 * 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
415 * 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
416 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
417 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
418 struct mbuf *m0 = m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
419 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
420 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
421 ip = mtod(m = m0, struct ip *);
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 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
424
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
425 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
426 * 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
427 * 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
428 * 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
429 * 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
430 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
431 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
432 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
433 return;
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
436 * 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
437 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
438 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
439 (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
440 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
441
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
442 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
443 struct in_multi *inm;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
444 #ifdef MROUTING
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
445 extern struct socket *ip_mrouter;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
446
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
447 if (m->m_flags & M_EXT) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
448 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
449 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
450 return;
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 ip = mtod(m, struct ip *);
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
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
455 if (ip_mrouter) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
456 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
457 * 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
458 * 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
459 * kernel-level multicast forwarding function.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
460 * 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
461 * 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
462 * 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
463 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
464 * (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
465 * 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
466 * ip_output().)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
467 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
468 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
469 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
470 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
471 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
472 return;
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 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
475
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
476 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
477 * 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
478 * 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
479 * host belongs to their destination groups.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
480 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
481 if (ip->ip_p == IPPROTO_IGMP)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
482 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
483 ipstat.ips_forward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
484 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
485 #endif
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 * 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
488 * arrival interface.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
489 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
490 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
491 if (inm == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
492 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
493 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
494 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
495 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
496 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
497 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
498 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
499 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
500 goto ours;
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
503 * 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
504 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
505 if (ipforwarding == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
506 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
507 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
508 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
509 ip_forward(m, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
510 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
511
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
512 ours:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
513 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
514 * 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
515 * Otherwise, nothing need be done.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
516 * (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
517 * if the packet was previously fragmented,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
518 * 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
519 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
520 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
521 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
522 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
523 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
524 return;
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 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
527 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
528
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 * Look for queue of fragments
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
531 * of this datagram.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
532 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
533 ipq_lock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
534 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
535 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
536 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
537 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
538 ip->ip_p == fp->ipq_p)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
539 goto found;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
540 fp = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
541 found:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
542
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
543 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
544 * 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
545 * 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
546 * convert offset of this to bytes.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
547 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
548 ip->ip_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
549 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
550 if (mff) {
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 * 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
553 * 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
554 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
555 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
556 ipstat.ips_badfrags++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
557 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
558 goto bad;
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 ip->ip_off <<= 3;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
562
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
563 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
564 * 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
565 * 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
566 * attempt reassembly; if it succeeds, proceed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
567 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
568 if (mff || ip->ip_off) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
569 ipstat.ips_fragments++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
570 if (ip_frags + 1 > ip_maxqueue) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
571 ip_flush();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
572 ipstat.ips_rcvmemdrop++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
573 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
574 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
575 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
576
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
577 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
578 M_IPQ, M_NOWAIT);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
579 if (ipqe == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
580 ipstat.ips_rcvmemdrop++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
581 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
582 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
583 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
584 ip_frags++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
585 ipqe->ipqe_mff = mff;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
586 ipqe->ipqe_ip = ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
587 ip = ip_reass(ipqe, fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
588 if (ip == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
589 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
590 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
591 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
592 ipstat.ips_reassembled++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
593 m = dtom(ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
594 hlen = ip->ip_hl << 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
595 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
596 if (fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
597 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
598 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
599 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
600 ip->ip_len -= hlen;
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
603 * 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
604 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
605 ipstat.ips_delivered++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
606 (*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
607 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
608 bad:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
609 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
610 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
611
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
612 struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
613 in_iawithaddr(ina, m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
614 struct in_addr ina;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
615 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
616 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
617 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
618
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
619 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
620 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
621 ((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
622 (IFF_LOOPBACK|IFF_LINK1) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
623 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
624 return ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
625 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
626 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
627 (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
628 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
629 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
630 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
631 * 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
632 * either for subnet or net.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
633 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
634 ina.s_addr == ia->ia_subnet ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
635 ina.s_addr == ia->ia_net) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
636 /* Make sure M_BCAST is set */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
637 m->m_flags |= M_BCAST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
638 return ia;
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 }
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 return NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
644 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
645
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
646 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
647 * 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
648 * 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
649 * 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
650 * 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
651 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
652 struct ip *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
653 ip_reass(ipqe, fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
654 register struct ipqent *ipqe;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
655 register struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
656 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
657 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
658 register struct ipqent *nq, *p, *q;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
659 struct ip *ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
660 struct mbuf *t;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
661 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
662 int i, next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
663
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 * Presence of header sizes in mbufs
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
666 * would confuse code below.
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 m->m_data += hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
669 m->m_len -= hlen;
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
672 * 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
673 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
674 if (fp == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
675 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
676 goto dropfrag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
677 fp = mtod(t, struct ipq *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
678 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
679 fp->ipq_ttl = IPFRAGTTL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
680 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
681 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
682 LIST_INIT(&fp->ipq_fragq);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
683 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
684 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
685 p = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
686 goto insert;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
687 }
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
690 * 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
691 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
692 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
693 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
694 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
695 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
696
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
697 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
698 * 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
699 * 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
700 * 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
701 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
702 if (p != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
703 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
704 ipqe->ipqe_ip->ip_off;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
705 if (i > 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
706 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
707 goto dropfrag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
708 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
709 ipqe->ipqe_ip->ip_off += i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
710 ipqe->ipqe_ip->ip_len -= i;
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 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
713
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 * 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
716 * 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
717 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
718 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
719 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
720 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
721 q->ipqe_ip->ip_off;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
722 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
723 q->ipqe_ip->ip_len -= i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
724 q->ipqe_ip->ip_off += i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
725 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
726 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
727 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
728 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
729 m_freem(dtom(q->ipqe_ip));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
730 LIST_REMOVE(q, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
731 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
732 ip_frags--;
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
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
735 insert:
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 * Stick new segment in its place;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
738 * check for complete reassembly.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
739 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
740 if (p == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
741 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
742 } else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
743 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
744 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
745 next = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
746 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
747 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
748 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
749 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
750 next += q->ipqe_ip->ip_len;
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 if (p->ipqe_mff)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
753 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
754
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 * 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
757 * concatenate fragments.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
758 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
759 q = fp->ipq_fragq.lh_first;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
760 ip = q->ipqe_ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
761 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
762 ipstat.ips_toolong++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
763 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
764 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
765 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
766 m = dtom(q->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
767 t = m->m_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
768 m->m_next = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
769 m_cat(m, t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
770 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
771 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
772 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
773 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
774 t = dtom(q->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
775 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
776 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
777 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
778 m_cat(m, t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
779 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
780
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
781 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
782 * 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
783 * modifying header of first packet;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
784 * dequeue and discard fragment reassembly header.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
785 * Make header visible.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
786 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
787 ip->ip_len = next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
788 ip->ip_ttl = 0; /* xxx */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
789 ip->ip_sum = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
790 ip->ip_src = fp->ipq_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
791 ip->ip_dst = fp->ipq_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
792 LIST_REMOVE(fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
793 (void) m_free(dtom(fp));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
794 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
795 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
796 /* 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
797 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
798 register int plen = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
799 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
800 plen += m->m_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
801 t->m_pkthdr.len = plen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
802 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
803 return (ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
804
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
805 dropfrag:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
806 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
807 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
808 FREE(ipqe, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
809 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
810 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
811 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
812
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 * 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
815 * associated datagrams.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
816 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
817 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
818 ip_freef(fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
819 struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
820 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
821 register struct ipqent *q, *p;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
822
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
823 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
824 p = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
825 m_freem(dtom(q->ipqe_ip));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
826 LIST_REMOVE(q, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
827 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
828 ip_frags--;
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 LIST_REMOVE(fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
831 (void) m_free(dtom(fp));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
832 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
833
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
834 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
835 * IP timer processing;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
836 * 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
837 * queue, discard it.
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 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
840 ip_slowtimo()
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 register struct ipq *fp, *nfp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
843 int s = splsoftnet();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
844
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
845 ipq_lock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
846 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
847 nfp = fp->ipq_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
848 if (--fp->ipq_ttl == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
849 ipstat.ips_fragtimeout++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
850 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
851 }
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 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
854 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
855 }
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
858 * Drain off all datagram fragments.
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 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
861 ip_drain()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
862 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
863
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
864 if (ipq_lock_try() == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
865 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
866 while (ipq.lh_first != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
867 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
868 ip_freef(ipq.lh_first);
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 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
871 }
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
874 * 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
875 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
876 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
877 ip_flush()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
878 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
879 int max = 50;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
880
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
881 /* ipq already locked */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
882 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
883 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
884 ip_freef(ipq.lh_first);
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 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
887
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
888 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
889 * Do option processing on a datagram,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
890 * 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
891 * or forwarding it if source-routed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
892 * 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
893 * 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
894 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
895 int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
896 ip_dooptions(m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
897 struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
898 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
899 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
900 register u_char *cp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
901 register struct ip_timestamp *ipt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
902 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
903 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
904 struct in_addr *sin, dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
905 n_time ntime;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
906
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
907 dst = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
908 cp = (u_char *)(ip + 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
909 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
910 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
911 opt = cp[IPOPT_OPTVAL];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
912 if (opt == IPOPT_EOL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
913 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
914 if (opt == IPOPT_NOP)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
915 optlen = 1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
916 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
917 optlen = cp[IPOPT_OLEN];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
918 if (optlen <= 0 || optlen > cnt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
919 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
920 goto bad;
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 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
923 switch (opt) {
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 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
926 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
927
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
928 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
929 * Source routing with record.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
930 * Find interface with current destination address.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
931 * 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
932 * or do nothing if loosely routed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
933 * 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
934 * 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
935 * address is on directly accessible net.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
936 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
937 case IPOPT_LSRR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
938 case IPOPT_SSRR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
939 if (!ip_dosourceroute) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
940 #ifndef __ECOS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
941 char buf[4*sizeof "123"];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
942
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
943 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
944 log(LOG_WARNING,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
945 "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
946 inet_ntoa(ip->ip_src), buf);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
947 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
948 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
949 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
950 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
951 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
952 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
953 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
954 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
955 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
956 ipaddr.sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
957 ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr)));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
958 if (ia == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
959 if (opt == IPOPT_SSRR) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
960 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
961 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
962 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
963 }
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 * 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
966 * yet; nothing to do except forward.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
967 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
968 break;
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 off--; /* 0 origin */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
971 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
972 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
973 * 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
974 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
975 save_rte(cp, ip->ip_src);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
976 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
977 }
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
980 * locate outgoing interface
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
981 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
982 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
983 sizeof(ipaddr.sin_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
984 if (opt == IPOPT_SSRR) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
985 #define INA struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
986 #define SA struct sockaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
987 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
988 ia = (INA)ifa_ifwithnet((SA)&ipaddr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
989 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
990 ia = ip_rtaddr(ipaddr.sin_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
991 if (ia == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
992 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
993 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
994 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
995 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
996 ip->ip_dst = ipaddr.sin_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
997 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
998 (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
999 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
1000 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1001 * 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
1002 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1003 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
1004 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1005
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1006 case IPOPT_RR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1007 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
1008 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
1009 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1010 }
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1013 * If no space remains, ignore.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1014 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1015 off--; /* 0 origin */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1016 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
1017 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1018 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
1019 sizeof(ipaddr.sin_addr));
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 * 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
1022 * 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
1023 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1024 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
1025 (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
1026 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1027 code = ICMP_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1028 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1029 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1030 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
1031 (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
1032 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
1033 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1034
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1035 case IPOPT_TS:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1036 code = cp - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1037 ipt = (struct ip_timestamp *)cp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1038 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
1039 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1040 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
1041 if (++ipt->ipt_oflw == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1042 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1043 break;
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 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
1046 switch (ipt->ipt_flg) {
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_TSONLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1049 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1050
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1051 case IPOPT_TS_TSANDADDR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1052 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
1053 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
1054 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1055 ipaddr.sin_addr = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1056 ia = (INA)ifaof_ifpforaddr((SA)&ipaddr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1057 m->m_pkthdr.rcvif);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1058 if (ia == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1059 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1060 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
1061 (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
1062 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
1063 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1064
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1065 case IPOPT_TS_PRESPEC:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1066 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
1067 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
1068 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1069 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
1070 sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1071 if (ifa_ifwithaddr((SA)&ipaddr) == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1072 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1073 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
1074 break;
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 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1077 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1078 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1079 ntime = iptime();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1080 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
1081 sizeof(n_time));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1082 ipt->ipt_ptr += sizeof(n_time);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1083 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1084 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1085 if (forward && ipforwarding) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1086 ip_forward(m, 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1087 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1088 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1089 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1090 bad:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1091 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
1092 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
1093 HTONS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1094 HTONS(ip->ip_off);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1095 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
1096 ipstat.ips_badoptions++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1097 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1098 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1099
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 * 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
1102 * 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
1103 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1104 struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1105 ip_rtaddr(dst)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1106 struct in_addr dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1107 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1108 register struct sockaddr_in *sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1109
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1110 sin = satosin(&ipforward_rt.ro_dst);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1111
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1112 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
1113 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1114 RTFREE(ipforward_rt.ro_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1115 ipforward_rt.ro_rt = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1116 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1117 sin->sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1118 sin->sin_len = sizeof(*sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1119 sin->sin_addr = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1120
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1121 rtalloc(&ipforward_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1122 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1123 if (ipforward_rt.ro_rt == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1124 return ((struct in_ifaddr *)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1125 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
1126 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1127
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 * 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
1130 * 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
1131 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1132 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1133 save_rte(option, dst)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1134 u_char *option;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1135 struct in_addr dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1136 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1137 unsigned olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1138
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1139 olen = option[IPOPT_OLEN];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1140 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1141 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1142 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
1143 #endif /* 0 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1144 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
1145 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1146 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
1147 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
1148 ip_srcrt.dst = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1149 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1150
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 * 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
1153 * Code shamelessly copied from arplookup().
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1154 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1155 static int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1156 ip_weadvertise(addr)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1157 u_int32_t addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1158 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1159 register struct rtentry *rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1160 register struct ifnet *ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1161 register struct ifaddr *ifa;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1162 struct sockaddr_inarp sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1163
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1164 sin.sin_len = sizeof(sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1165 sin.sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1166 sin.sin_addr.s_addr = addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1167 sin.sin_other = SIN_PROXY;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1168 rt = rtalloc1(sintosa(&sin), 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1169 if (rt == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1170 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1171
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1172 RTFREE(rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1173
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1174 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
1175 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
1176 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1177
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1178 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
1179 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
1180 ifa = ifa->ifa_list.tqe_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1181 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
1182 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1183
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1184 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
1185 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
1186 ETHER_ADDR_LEN))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1187 return 1;
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 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1191 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1192
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1193 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1194 * 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
1195 * 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
1196 * 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
1197 */
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jlarmour
parents:
diff changeset
1198 struct mbuf *
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jlarmour
parents:
diff changeset
1199 ip_srcroute()
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jlarmour
parents:
diff changeset
1200 {
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jlarmour
parents:
diff changeset
1201 register struct in_addr *p, *q;
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jlarmour
parents:
diff changeset
1202 register struct mbuf *m;
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jlarmour
parents:
diff changeset
1203
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jlarmour
parents:
diff changeset
1204 if (ip_nhops == 0)
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jlarmour
parents:
diff changeset
1205 return ((struct mbuf *)0);
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jlarmour
parents:
diff changeset
1206 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
1207 if (m == 0)
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jlarmour
parents:
diff changeset
1208 return ((struct mbuf *)0);
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jlarmour
parents:
diff changeset
1209
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jlarmour
parents:
diff changeset
1210 #define OPTSIZ (sizeof(ip_srcrt.nop) + sizeof(ip_srcrt.srcopt))
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jlarmour
parents:
diff changeset
1211
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jlarmour
parents:
diff changeset
1212 /* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */
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jlarmour
parents:
diff changeset
1213 m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) +
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jlarmour
parents:
diff changeset
1214 OPTSIZ;
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jlarmour
parents:
diff changeset
1215 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1216 if (ipprintfs)
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jlarmour
parents:
diff changeset
1217 printf("ip_srcroute: nhops %d mlen %d", ip_nhops, m->m_len);
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jlarmour
parents:
diff changeset
1218 #endif
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jlarmour
parents:
diff changeset
1219
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jlarmour
parents:
diff changeset
1220 /*
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jlarmour
parents:
diff changeset
1221 * First save first hop for return route
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jlarmour
parents:
diff changeset
1222 */
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jlarmour
parents:
diff changeset
1223 p = &ip_srcrt.route[ip_nhops - 1];
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jlarmour
parents:
diff changeset
1224 *(mtod(m, struct in_addr *)) = *p--;
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jlarmour
parents:
diff changeset
1225 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1226 if (ipprintfs)
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jlarmour
parents:
diff changeset
1227 printf(" hops %x", ntohl(mtod(m, struct in_addr *)->s_addr));
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jlarmour
parents:
diff changeset
1228 #endif
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jlarmour
parents:
diff changeset
1229
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jlarmour
parents:
diff changeset
1230 /*
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jlarmour
parents:
diff changeset
1231 * Copy option fields and padding (nop) to mbuf.
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jlarmour
parents:
diff changeset
1232 */
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parents:
diff changeset
1233 ip_srcrt.nop = IPOPT_NOP;
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jlarmour
parents:
diff changeset
1234 ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF;
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jlarmour
parents:
diff changeset
1235 bcopy((caddr_t)&ip_srcrt.nop,
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jlarmour
parents:
diff changeset
1236 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
1237 q = (struct in_addr *)(mtod(m, caddr_t) +
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jlarmour
parents:
diff changeset
1238 sizeof(struct in_addr) + OPTSIZ);
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jlarmour
parents:
diff changeset
1239 #undef OPTSIZ
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jlarmour
parents:
diff changeset
1240 /*
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jlarmour
parents:
diff changeset
1241 * Record return path as an IP source route,
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jlarmour
parents:
diff changeset
1242 * reversing the path (pointers are now aligned).
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jlarmour
parents:
diff changeset
1243 */
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jlarmour
parents:
diff changeset
1244 while (p >= ip_srcrt.route) {
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jlarmour
parents:
diff changeset
1245 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1246 if (ipprintfs)
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jlarmour
parents:
diff changeset
1247 printf(" %x", ntohl(q->s_addr));
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jlarmour
parents:
diff changeset
1248 #endif
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jlarmour
parents:
diff changeset
1249 *q++ = *p--;
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jlarmour
parents:
diff changeset
1250 }
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jlarmour
parents:
diff changeset
1251 /*
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jlarmour
parents:
diff changeset
1252 * Last hop goes to final destination.
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jlarmour
parents:
diff changeset
1253 */
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jlarmour
parents:
diff changeset
1254 *q = ip_srcrt.dst;
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jlarmour
parents:
diff changeset
1255 #ifdef DIAGNOSTIC
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jlarmour
parents:
diff changeset
1256 if (ipprintfs)
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jlarmour
parents:
diff changeset
1257 printf(" %x\n", ntohl(q->s_addr));
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jlarmour
parents:
diff changeset
1258 #endif
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jlarmour
parents:
diff changeset
1259 return (m);
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jlarmour
parents:
diff changeset
1260 }
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jlarmour
parents:
diff changeset
1261
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jlarmour
parents:
diff changeset
1262 /*
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jlarmour
parents:
diff changeset
1263 * Strip out IP options, at higher
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1264 * level protocol in the kernel.
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jlarmour
parents:
diff changeset
1265 * Second argument is buffer to which options
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jlarmour
parents:
diff changeset
1266 * 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
1267 * 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
1268 */
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jlarmour
parents:
diff changeset
1269 void
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jlarmour
parents:
diff changeset
1270 ip_stripoptions(m, mopt)
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jlarmour
parents:
diff changeset
1271 register struct mbuf *m;
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jlarmour
parents:
diff changeset
1272 struct mbuf *mopt;
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jlarmour
parents:
diff changeset
1273 {
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jlarmour
parents:
diff changeset
1274 register int i;
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jlarmour
parents:
diff changeset
1275 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
1276 register caddr_t opts;
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jlarmour
parents:
diff changeset
1277 int olen;
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jlarmour
parents:
diff changeset
1278
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jlarmour
parents:
diff changeset
1279 olen = (ip->ip_hl<<2) - sizeof (struct ip);
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jlarmour
parents:
diff changeset
1280 opts = (caddr_t)(ip + 1);
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jlarmour
parents:
diff changeset
1281 i = m->m_len - (sizeof (struct ip) + olen);
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jlarmour
parents:
diff changeset
1282 bcopy(opts + olen, opts, (unsigned)i);
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jlarmour
parents:
diff changeset
1283 m->m_len -= olen;
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jlarmour
parents:
diff changeset
1284 if (m->m_flags & M_PKTHDR)
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jlarmour
parents:
diff changeset
1285 m->m_pkthdr.len -= olen;
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jlarmour
parents:
diff changeset
1286 ip->ip_hl = sizeof(struct ip) >> 2;
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jlarmour
parents:
diff changeset
1287 }
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jlarmour
parents:
diff changeset
1288
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1289 int inetctlerrmap[PRC_NCMDS] = {
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jlarmour
parents:
diff changeset
1290 0, 0, 0, 0,
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jlarmour
parents:
diff changeset
1291 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1292 EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1293 EMSGSIZE, EHOSTUNREACH, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1294 0, 0, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1295 ENOPROTOOPT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1296 };
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1297
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1298 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1299 * 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
1300 * 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
1301 * 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
1302 * of codes and types.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1303 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1304 * 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
1305 * 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
1306 * 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
1307 * protocol deal with that.
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 * 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
1310 * via a source route.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1311 */
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jlarmour
parents:
diff changeset
1312 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1313 ip_forward(m, srcrt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1314 struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1315 int srcrt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1316 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1317 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
1318 register struct sockaddr_in *sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1319 register struct rtentry *rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1320 int error, type = 0, code = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1321 struct mbuf *mcopy;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1322 n_long dest;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1323 struct ifnet *destifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1324 #if 0 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1325 struct ifnet dummyifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1326 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1327
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1328 dest = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1329 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1330 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1331 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
1332 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
1333 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1334 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
1335 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1336 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1337 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1338 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1339 HTONS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1340 if (ip->ip_ttl <= IPTTLDEC) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1341 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
1342 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1343 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1344 ip->ip_ttl -= IPTTLDEC;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1345
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1346 sin = satosin(&ipforward_rt.ro_dst);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1347 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
1348 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
1349 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1350 RTFREE(ipforward_rt.ro_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1351 ipforward_rt.ro_rt = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1352 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1353 sin->sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1354 sin->sin_len = sizeof(*sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1355 sin->sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1356
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1357 rtalloc(&ipforward_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1358 if (ipforward_rt.ro_rt == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1359 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
1360 return;
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 rt = ipforward_rt.ro_rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1363 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1364
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 * 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
1367 * 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
1368 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1369 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
1370
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1371 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1372 * 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
1373 * 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
1374 * 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
1375 * 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
1376 * 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
1377 * 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
1378 * 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
1379 * as ours (proxy arp).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1380 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1381 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
1382 (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
1383 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
1384 ipsendredirects && !srcrt &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1385 !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
1386 if (rt->rt_ifa &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1387 (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
1388 ifatoia(rt->rt_ifa)->ia_subnet) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1389 if (rt->rt_flags & RTF_GATEWAY)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1390 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
1391 else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1392 dest = ip->ip_dst.s_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1393 /* 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
1394 type = ICMP_REDIRECT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1395 code = ICMP_REDIRECT_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1396 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1397 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1398 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
1399 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1400 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1401 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1402
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1403 #if 0 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1404 m->m_pkthdr.rcvif = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1405 #endif /*IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1406 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
1407 (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
1408 0, NULL, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1409 if (error)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1410 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1411 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1412 ipstat.ips_forward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1413 if (type)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1414 ipstat.ips_redirectsent++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1415 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1416 if (mcopy)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1417 m_freem(mcopy);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1418 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1419 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1420 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1421 if (mcopy == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1422 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1423 destifp = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1424
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1425 switch (error) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1426
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1427 case 0: /* forwarded, but need redirect */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1428 /* type, code set above */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1429 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1430
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1431 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
1432 case EHOSTUNREACH:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1433 case ENETDOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1434 case EHOSTDOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1435 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1436 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1437 code = ICMP_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1438 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1439
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1440 case EMSGSIZE:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1441 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1442 code = ICMP_UNREACH_NEEDFRAG;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1443 #if 1 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1444 if (ipforward_rt.ro_rt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1445 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
1446 #else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1447 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1448 * 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
1449 * originator the tunnel MTU.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1450 * 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
1451 * XXX quickhack!!!
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1452 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1453 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1454 struct secpolicy *sp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1455 int ipsecerror;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1456 int ipsechdr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1457 struct route *ro;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1458
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1459 sp = ipsec4_getpolicybyaddr(mcopy,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1460 IP_FORWARDING,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1461 &ipsecerror);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1462
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1463 if (sp == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1464 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
1465 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1466 /* count IPsec header size */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1467 ipsechdr = ipsec4_hdrsiz(mcopy, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1468
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 * 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
1471 * header, compute tunnel MTU.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1472 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1473 * XXX BUG ALERT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1474 * 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
1475 * 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
1476 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1477 /*XXX*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1478 destifp = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1479 if (sp->req != NULL
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1480 && sp->req->sa != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1481 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
1482 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
1483 dummyifp.if_mtu =
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1484 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
1485 dummyifp.if_mtu -= ipsechdr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1486 destifp = &dummyifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1487 }
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 key_freesp(sp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1491 }
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1492 }
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1493 #endif /*IPSEC*/
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diff changeset
1494 ipstat.ips_cantfrag++;
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diff changeset
1495 break;
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diff changeset
1496
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1497 case ENOBUFS:
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diff changeset
1498 type = ICMP_SOURCEQUENCH;
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diff changeset
1499 code = 0;
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1500 break;
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diff changeset
1501 }
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1502
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diff changeset
1503 icmp_error(mcopy, type, code, dest, destifp);
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1504 }
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1505
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diff changeset
1506 #ifdef CYGPKG_NET_SYSCTL
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diff changeset
1507 int
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diff changeset
1508 ip_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
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diff changeset
1509 int *name;
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diff changeset
1510 u_int namelen;
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diff changeset
1511 void *oldp;
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diff changeset
1512 size_t *oldlenp;
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diff changeset
1513 void *newp;
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diff changeset
1514 size_t newlen;
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diff changeset
1515 {
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diff changeset
1516 /* All sysctl names at this level are terminal. */
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diff changeset
1517 if (namelen != 1)
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diff changeset
1518 return (ENOTDIR);
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diff changeset
1519
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diff changeset
1520 switch (name[0]) {
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diff changeset
1521 case IPCTL_FORWARDING:
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diff changeset
1522 return (sysctl_int(oldp, oldlenp, newp, newlen, &ipforwarding));
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diff changeset
1523 case IPCTL_SENDREDIRECTS:
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diff changeset
1524 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1525 &ipsendredirects));
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diff changeset
1526 case IPCTL_DEFTTL:
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diff changeset
1527 return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_defttl));
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diff changeset
1528 #ifdef notyet
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diff changeset
1529 case IPCTL_DEFMTU:
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diff changeset
1530 return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu));
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diff changeset
1531 #endif
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diff changeset
1532 case IPCTL_SOURCEROUTE:
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diff changeset
1533 /*
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diff changeset
1534 * Don't allow this to change in a secure environment.
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parents:
diff changeset
1535 */
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diff changeset
1536 if (newp && securelevel > 0)
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diff changeset
1537 return (EPERM);
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diff changeset
1538 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1539 &ip_dosourceroute));
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diff changeset
1540 case IPCTL_DIRECTEDBCAST:
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diff changeset
1541 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1542 &ip_directedbcast));
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diff changeset
1543 case IPCTL_IPPORT_FIRSTAUTO:
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diff changeset
1544 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1545 &ipport_firstauto));
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diff changeset
1546 case IPCTL_IPPORT_LASTAUTO:
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diff changeset
1547 return (sysctl_int(oldp, oldlenp, newp, newlen,
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parents:
diff changeset
1548 &ipport_lastauto));
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diff changeset
1549 case IPCTL_IPPORT_HIFIRSTAUTO:
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diff changeset
1550 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1551 &ipport_hifirstauto));
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diff changeset
1552 case IPCTL_IPPORT_HILASTAUTO:
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diff changeset
1553 return (sysctl_int(oldp, oldlenp, newp, newlen,
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parents:
diff changeset
1554 &ipport_hilastauto));
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diff changeset
1555 case IPCTL_IPPORT_MAXQUEUE:
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diff changeset
1556 return (sysctl_int(oldp, oldlenp, newp, newlen,
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diff changeset
1557 &ip_maxqueue));
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diff changeset
1558 case IPCTL_ENCDEBUG:
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diff changeset
1559 return (sysctl_int(oldp, oldlenp, newp, newlen, &encdebug));
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diff changeset
1560 default:
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diff changeset
1561 return (EOPNOTSUPP);
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diff changeset
1562 }
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diff changeset
1563 /* NOTREACHED */
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diff changeset
1564 }
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diff changeset
1565 #endif // CYGPKG_NET_SYSCTL