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annotate packages/net/bsd_tcpip/current/src/sys/netinet/if_ether.c @ 1652:2a37dbf01ca2

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Clean up log messages
author gthomas
date Tue, 25 May 2004 13:10:02 +0000
parents a571341dd6e5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // src/sys/netinet/if_ether.c
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4 //
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5 //==========================================================================
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6 //####BSDCOPYRIGHTBEGIN####
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7 //
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8 // -------------------------------------------
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9 //
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10 // Portions of this software may have been derived from OpenBSD,
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11 // FreeBSD or other sources, and are covered by the appropriate
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12 // copyright disclaimers included herein.
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13 //
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14 // Portions created by Red Hat are
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15 // Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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16 //
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17 // -------------------------------------------
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18 //
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19 //####BSDCOPYRIGHTEND####
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20 //==========================================================================
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21
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22 /*
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23 * Copyright (c) 1982, 1986, 1988, 1993
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24 * The Regents of the University of California. All rights reserved.
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25 *
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26 * Redistribution and use in source and binary forms, with or without
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27 * modification, are permitted provided that the following conditions
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28 * are met:
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29 * 1. Redistributions of source code must retain the above copyright
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30 * notice, this list of conditions and the following disclaimer.
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31 * 2. Redistributions in binary form must reproduce the above copyright
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32 * notice, this list of conditions and the following disclaimer in the
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33 * documentation and/or other materials provided with the distribution.
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34 * 3. All advertising materials mentioning features or use of this software
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35 * must display the following acknowledgement:
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36 * This product includes software developed by the University of
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37 * California, Berkeley and its contributors.
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38 * 4. Neither the name of the University nor the names of its contributors
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39 * may be used to endorse or promote products derived from this software
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40 * without specific prior written permission.
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41 *
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42 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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45 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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52 * SUCH DAMAGE.
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53 *
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54 * @(#)if_ether.c 8.1 (Berkeley) 6/10/93
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55 * $FreeBSD: src/sys/netinet/if_ether.c,v 1.64.2.11 2001/07/25 17:27:56 jlemon Exp $
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56 */
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57
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58 /*
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59 * Ethernet address resolution protocol.
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60 * TODO:
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61 * add "inuse/lock" bit (or ref. count) along with valid bit
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62 */
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63
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64 #include <sys/param.h>
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65 #include <sys/queue.h>
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66 #include <sys/sysctl.h>
208
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67 #include <sys/mbuf.h>
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68 #include <sys/malloc.h>
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69 #include <sys/socket.h>
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70
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71 #include <net/if.h>
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72 #include <net/if_dl.h>
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73 #include <net/if_types.h>
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74 #include <net/route.h>
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75 #include <net/netisr.h>
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76 #include <net/if_llc.h>
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77 #ifdef BRIDGE
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78 #include <net/ethernet.h>
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79 #include <net/bridge.h>
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80 #endif
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81
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82 #include <netinet/in.h>
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83 #include <netinet/in_var.h>
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84 #include <netinet/if_ether.h>
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85
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86 #include <net/iso88025.h>
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87
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88 #define SIN(s) ((struct sockaddr_in *)s)
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89 #define SDL(s) ((struct sockaddr_dl *)s)
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90
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91 SYSCTL_DECL(_net_link_ether);
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92 SYSCTL_NODE(_net_link_ether, PF_INET, inet, CTLFLAG_RW, 0, "");
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93
208
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94 /* timer values */
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95 static int arpt_prune = (5*60*1); /* walk list every 5 minutes */
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96 static int arpt_keep = (20*60); /* once resolved, good for 20 more minutes */
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97 static int arpt_down = 20; /* once declared down, don't send for 20 sec */
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98
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99 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, prune_intvl, CTLFLAG_RW,
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100 &arpt_prune, 0, "");
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101 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, max_age, CTLFLAG_RW,
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102 &arpt_keep, 0, "");
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103 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, host_down_time, CTLFLAG_RW,
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104 &arpt_down, 0, "");
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105
208
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106 #define rt_expire rt_rmx.rmx_expire
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107
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108 struct llinfo_arp {
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109 LIST_ENTRY(llinfo_arp) la_le;
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110 struct rtentry *la_rt;
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111 struct mbuf *la_hold; /* last packet until resolved/timeout */
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112 long la_asked; /* last time we QUERIED for this addr */
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113 #define la_timer la_rt->rt_rmx.rmx_expire /* deletion time in seconds */
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114 };
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115
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116 static LIST_HEAD(, llinfo_arp) llinfo_arp;
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117
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118 struct ifqueue arpintrq = {0, 0, 0, 50};
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119 static int arp_inuse, arp_allocated;
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120
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121 static int arp_maxtries = 5;
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122 static int useloopback = 1; /* use loopback interface for local traffic */
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123 static int arp_proxyall = 0;
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124
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125 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, maxtries, CTLFLAG_RW,
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126 &arp_maxtries, 0, "");
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127 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, useloopback, CTLFLAG_RW,
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128 &useloopback, 0, "");
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129 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, proxyall, CTLFLAG_RW,
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130 &arp_proxyall, 0, "");
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131
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132 static void arp_rtrequest __P((int, struct rtentry *, struct sockaddr *));
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133 static void arprequest __P((struct arpcom *,
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134 struct in_addr *, struct in_addr *, u_char *));
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135 static void arpintr __P((void));
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136 static void arptfree __P((struct llinfo_arp *));
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137 static void arptimer __P((void *));
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138 static struct llinfo_arp
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139 *arplookup __P((u_long, int, int));
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140 #ifdef INET
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141 static void in_arpinput __P((struct mbuf *));
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142 #endif
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143
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144 /*
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145 * Timeout routine. Age arp_tab entries periodically.
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146 */
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147 /* ARGSUSED */
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148 static void
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149 arptimer(ignored_arg)
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150 void *ignored_arg;
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151 {
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152 int s = splnet();
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153 register struct llinfo_arp *la = llinfo_arp.lh_first;
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154 struct llinfo_arp *ola;
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155
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156 timeout(arptimer, (caddr_t)0, arpt_prune * hz);
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157 while ((ola = la) != 0) {
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158 register struct rtentry *rt = la->la_rt;
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159 la = la->la_le.le_next;
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160 if (rt->rt_expire && rt->rt_expire <= time_second)
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161 arptfree(ola); /* timer has expired, clear */
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162 }
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163 splx(s);
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164 }
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165
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166 /*
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167 * Parallel to llc_rtrequest.
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168 */
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169 static void
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170 arp_rtrequest(req, rt, sa)
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171 int req;
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172 register struct rtentry *rt;
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173 struct sockaddr *sa;
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174 {
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175 register struct sockaddr *gate = rt->rt_gateway;
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176 register struct llinfo_arp *la = (struct llinfo_arp *)rt->rt_llinfo;
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177 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
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178 static int arpinit_done;
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179
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180 if (!arpinit_done) {
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181 arpinit_done = 1;
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182 LIST_INIT(&llinfo_arp);
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183 timeout(arptimer, (caddr_t)0, hz);
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184 register_netisr(NETISR_ARP, arpintr);
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185 }
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186 if (rt->rt_flags & RTF_GATEWAY)
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187 return;
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188 switch (req) {
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189
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190 case RTM_ADD:
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191 /*
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192 * XXX: If this is a manually added route to interface
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193 * such as older version of routed or gated might provide,
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194 * restore cloning bit.
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195 */
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196 if ((rt->rt_flags & RTF_HOST) == 0 &&
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197 SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff)
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198 rt->rt_flags |= RTF_CLONING;
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199 if (rt->rt_flags & RTF_CLONING) {
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200 /*
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201 * Case 1: This route should come from a route to iface.
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202 */
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203 rt_setgate(rt, rt_key(rt),
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204 (struct sockaddr *)&null_sdl);
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205 gate = rt->rt_gateway;
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206 SDL(gate)->sdl_type = rt->rt_ifp->if_type;
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207 SDL(gate)->sdl_index = rt->rt_ifp->if_index;
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208 rt->rt_expire = time_second;
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209 break;
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210 }
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211 /* Announce a new entry if requested. */
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212 if (rt->rt_flags & RTF_ANNOUNCE)
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213 arprequest((struct arpcom *)rt->rt_ifp,
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214 &SIN(rt_key(rt))->sin_addr,
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215 &SIN(rt_key(rt))->sin_addr,
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216 (u_char *)LLADDR(SDL(gate)));
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217 /*FALLTHROUGH*/
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218 case RTM_RESOLVE:
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219 if (gate->sa_family != AF_LINK ||
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220 gate->sa_len < sizeof(null_sdl)) {
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221 log(LOG_DEBUG, "arp_rtrequest: bad gateway value\n");
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222 break;
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223 }
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224 SDL(gate)->sdl_type = rt->rt_ifp->if_type;
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225 SDL(gate)->sdl_index = rt->rt_ifp->if_index;
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226 if (la != 0)
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227 break; /* This happens on a route change */
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228 /*
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229 * Case 2: This route may come from cloning, or a manual route
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230 * add with a LL address.
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231 */
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232 R_Malloc(la, struct llinfo_arp *, sizeof(*la));
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233 rt->rt_llinfo = (caddr_t)la;
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234 if (la == 0) {
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235 log(LOG_DEBUG, "arp_rtrequest: malloc failed\n");
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236 break;
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237 }
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238 arp_inuse++, arp_allocated++;
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239 Bzero(la, sizeof(*la));
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240 la->la_rt = rt;
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241 rt->rt_flags |= RTF_LLINFO;
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242 LIST_INSERT_HEAD(&llinfo_arp, la, la_le);
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243
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244 #ifdef INET
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245 /*
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246 * This keeps the multicast addresses from showing up
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247 * in `arp -a' listings as unresolved. It's not actually
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248 * functional. Then the same for broadcast.
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249 */
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250 if (IN_MULTICAST(ntohl(SIN(rt_key(rt))->sin_addr.s_addr))) {
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251 ETHER_MAP_IP_MULTICAST(&SIN(rt_key(rt))->sin_addr,
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252 LLADDR(SDL(gate)));
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253 SDL(gate)->sdl_alen = 6;
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254 rt->rt_expire = 0;
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255 }
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256 if (in_broadcast(SIN(rt_key(rt))->sin_addr, rt->rt_ifp)) {
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257 memcpy(LLADDR(SDL(gate)), etherbroadcastaddr, 6);
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258 SDL(gate)->sdl_alen = 6;
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259 rt->rt_expire = 0;
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260 }
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261 #endif
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262
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263 if (SIN(rt_key(rt))->sin_addr.s_addr ==
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264 (IA_SIN(rt->rt_ifa))->sin_addr.s_addr) {
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265 /*
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266 * This test used to be
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267 * if (loif.if_flags & IFF_UP)
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268 * It allowed local traffic to be forced
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269 * through the hardware by configuring the loopback down.
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270 * However, it causes problems during network configuration
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271 * for boards that can't receive packets they send.
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272 * It is now necessary to clear "useloopback" and remove
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273 * the route to force traffic out to the hardware.
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274 */
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275 rt->rt_expire = 0;
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276 Bcopy(((struct arpcom *)rt->rt_ifp)->ac_enaddr,
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277 LLADDR(SDL(gate)), SDL(gate)->sdl_alen = 6);
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278 if (useloopback)
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279 rt->rt_ifp = loif;
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diff changeset
280
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281 }
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282 break;
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diff changeset
283
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diff changeset
284 case RTM_DELETE:
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diff changeset
285 if (la == 0)
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diff changeset
286 break;
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diff changeset
287 arp_inuse--;
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288 LIST_REMOVE(la, la_le);
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289 rt->rt_llinfo = 0;
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290 rt->rt_flags &= ~RTF_LLINFO;
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diff changeset
291 if (la->la_hold)
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292 m_freem(la->la_hold);
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diff changeset
293 Free((caddr_t)la);
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294 }
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295 }
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296
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297 /*
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298 * Broadcast an ARP request. Caller specifies:
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299 * - arp header source ip address
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300 * - arp header target ip address
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301 * - arp header source ethernet address
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302 */
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303 static void
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304 arprequest(ac, sip, tip, enaddr)
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305 register struct arpcom *ac;
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306 register struct in_addr *sip, *tip;
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307 register u_char *enaddr;
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308 {
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309 register struct mbuf *m;
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310 register struct ether_header *eh;
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311 register struct ether_arp *ea;
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312 struct sockaddr sa;
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313 static u_char llcx[] = { 0x82, 0x40, LLC_SNAP_LSAP, LLC_SNAP_LSAP,
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314 LLC_UI, 0x00, 0x00, 0x00, 0x08, 0x06 };
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315
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316 if ((m = m_gethdr(M_DONTWAIT, MT_DATA)) == NULL)
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317 return;
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318 m->m_pkthdr.rcvif = (struct ifnet *)0;
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319 switch (ac->ac_if.if_type) {
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320 case IFT_ISO88025:
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321 m->m_len = sizeof(*ea) + sizeof(llcx);
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322 m->m_pkthdr.len = sizeof(*ea) + sizeof(llcx);
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323 MH_ALIGN(m, sizeof(*ea) + sizeof(llcx));
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324 (void)memcpy(mtod(m, caddr_t), llcx, sizeof(llcx));
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325 (void)memcpy(sa.sa_data, etherbroadcastaddr, 6);
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326 (void)memcpy(sa.sa_data + 6, enaddr, 6);
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327 sa.sa_data[6] |= TR_RII;
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328 sa.sa_data[12] = TR_AC;
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329 sa.sa_data[13] = TR_LLC_FRAME;
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330 ea = (struct ether_arp *)(mtod(m, char *) + sizeof(llcx));
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331 bzero((caddr_t)ea, sizeof (*ea));
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332 ea->arp_hrd = htons(ARPHRD_IEEE802);
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333 break;
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334 case IFT_FDDI:
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335 case IFT_ETHER:
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336 /*
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337 * This may not be correct for types not explicitly
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338 * listed, but this is our best guess
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339 */
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340 default:
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341 m->m_len = sizeof(*ea);
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342 m->m_pkthdr.len = sizeof(*ea);
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343 MH_ALIGN(m, sizeof(*ea));
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344 ea = mtod(m, struct ether_arp *);
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345 eh = (struct ether_header *)sa.sa_data;
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346 bzero((caddr_t)ea, sizeof (*ea));
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347 /* if_output will not swap */
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348 eh->ether_type = htons(ETHERTYPE_ARP);
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349 (void)memcpy(eh->ether_dhost, etherbroadcastaddr,
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350 sizeof(eh->ether_dhost));
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351 ea->arp_hrd = htons(ARPHRD_ETHER);
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352 break;
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353 }
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354 ea->arp_pro = htons(ETHERTYPE_IP);
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355 ea->arp_hln = sizeof(ea->arp_sha); /* hardware address length */
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356 ea->arp_pln = sizeof(ea->arp_spa); /* protocol address length */
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357 ea->arp_op = htons(ARPOP_REQUEST);
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358 (void)memcpy(ea->arp_sha, enaddr, sizeof(ea->arp_sha));
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359 (void)memcpy(ea->arp_spa, sip, sizeof(ea->arp_spa));
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360 (void)memcpy(ea->arp_tpa, tip, sizeof(ea->arp_tpa));
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361 sa.sa_family = AF_UNSPEC;
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362 sa.sa_len = sizeof(sa);
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363 (*ac->ac_if.if_output)(&ac->ac_if, m, &sa, (struct rtentry *)0);
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364 }
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365
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366 /*
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diff changeset
367 * Resolve an IP address into an ethernet address. If success,
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diff changeset
368 * desten is filled in. If there is no entry in arptab,
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369 * set one up and broadcast a request for the IP address.
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diff changeset
370 * Hold onto this mbuf and resend it once the address
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diff changeset
371 * is finally resolved. A return value of 1 indicates
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diff changeset
372 * that desten has been filled in and the packet should be sent
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diff changeset
373 * normally; a 0 return indicates that the packet has been
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diff changeset
374 * taken over here, either now or for later transmission.
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diff changeset
375 */
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diff changeset
376 int
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377 arpresolve(ac, rt, m, dst, desten, rt0)
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diff changeset
378 register struct arpcom *ac;
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379 register struct rtentry *rt;
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diff changeset
380 struct mbuf *m;
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381 register struct sockaddr *dst;
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diff changeset
382 register u_char *desten;
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diff changeset
383 struct rtentry *rt0;
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diff changeset
384 {
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diff changeset
385 struct llinfo_arp *la = 0;
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diff changeset
386 struct sockaddr_dl *sdl;
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387
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388 if (m->m_flags & M_BCAST) { /* broadcast */
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389 (void)memcpy(desten, etherbroadcastaddr, sizeof(etherbroadcastaddr));
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390 return (1);
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391 }
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392 if (m->m_flags & M_MCAST) { /* multicast */
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393 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, desten);
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394 return(1);
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diff changeset
395 }
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diff changeset
396 if (rt)
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397 la = (struct llinfo_arp *)rt->rt_llinfo;
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diff changeset
398 if (la == 0) {
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diff changeset
399 la = arplookup(SIN(dst)->sin_addr.s_addr, 1, 0);
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diff changeset
400 if (la)
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diff changeset
401 rt = la->la_rt;
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diff changeset
402 }
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403 if (la == 0 || rt == 0) {
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diff changeset
404 log(LOG_DEBUG, "arpresolve: can't allocate llinfo for %s%s%s\n",
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405 inet_ntoa(SIN(dst)->sin_addr), la ? "la" : "",
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406 rt ? "rt" : "");
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407 m_freem(m);
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408 return (0);
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diff changeset
409 }
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410 sdl = SDL(rt->rt_gateway);
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diff changeset
411 /*
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diff changeset
412 * Check the address family and length is valid, the address
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413 * is resolved; otherwise, try to resolve.
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414 */
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415 if ((rt->rt_expire == 0 || rt->rt_expire > time_second) &&
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416 sdl->sdl_family == AF_LINK && sdl->sdl_alen != 0) {
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diff changeset
417 bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
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jlarmour
parents:
diff changeset
418 return 1;
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jlarmour
parents:
diff changeset
419 }
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jlarmour
parents:
diff changeset
420 /*
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jlarmour
parents:
diff changeset
421 * If ARP is disabled on this interface, stop.
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jlarmour
parents:
diff changeset
422 * XXX
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jlarmour
parents:
diff changeset
423 * Probably should not allocate empty llinfo struct if we are
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jlarmour
parents:
diff changeset
424 * not going to be sending out an arp request.
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jlarmour
parents:
diff changeset
425 */
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jlarmour
parents:
diff changeset
426 if (ac->ac_if.if_flags & IFF_NOARP)
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jlarmour
parents:
diff changeset
427 return (0);
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jlarmour
parents:
diff changeset
428 /*
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jlarmour
parents:
diff changeset
429 * There is an arptab entry, but no ethernet address
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jlarmour
parents:
diff changeset
430 * response yet. Replace the held mbuf with this
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jlarmour
parents:
diff changeset
431 * latest one.
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jlarmour
parents:
diff changeset
432 */
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jlarmour
parents:
diff changeset
433 if (la->la_hold)
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jlarmour
parents:
diff changeset
434 m_freem(la->la_hold);
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jlarmour
parents:
diff changeset
435 la->la_hold = m;
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jlarmour
parents:
diff changeset
436 if (rt->rt_expire) {
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jlarmour
parents:
diff changeset
437 rt->rt_flags &= ~RTF_REJECT;
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jlarmour
parents:
diff changeset
438 if (la->la_asked == 0 || rt->rt_expire != time_second) {
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jlarmour
parents:
diff changeset
439 rt->rt_expire = time_second;
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jlarmour
parents:
diff changeset
440 if (la->la_asked++ < arp_maxtries)
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jlarmour
parents:
diff changeset
441 arprequest(ac,
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jlarmour
parents:
diff changeset
442 &SIN(rt->rt_ifa->ifa_addr)->sin_addr,
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jlarmour
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443 &SIN(dst)->sin_addr, ac->ac_enaddr);
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jlarmour
parents:
diff changeset
444 else {
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jlarmour
parents:
diff changeset
445 rt->rt_flags |= RTF_REJECT;
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jlarmour
parents:
diff changeset
446 rt->rt_expire += arpt_down;
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jlarmour
parents:
diff changeset
447 la->la_asked = 0;
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jlarmour
parents:
diff changeset
448 }
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jlarmour
parents:
diff changeset
449
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jlarmour
parents:
diff changeset
450 }
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jlarmour
parents:
diff changeset
451 }
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jlarmour
parents:
diff changeset
452 return (0);
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jlarmour
parents:
diff changeset
453 }
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jlarmour
parents:
diff changeset
454
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jlarmour
parents:
diff changeset
455 /*
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jlarmour
parents:
diff changeset
456 * Common length and type checks are done here,
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jlarmour
parents:
diff changeset
457 * then the protocol-specific routine is called.
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jlarmour
parents:
diff changeset
458 */
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jlarmour
parents:
diff changeset
459 static void
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jlarmour
parents:
diff changeset
460 arpintr()
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jlarmour
parents:
diff changeset
461 {
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jlarmour
parents:
diff changeset
462 register struct mbuf *m;
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jlarmour
parents:
diff changeset
463 register struct arphdr *ar;
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jlarmour
parents:
diff changeset
464 int s;
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jlarmour
parents:
diff changeset
465
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jlarmour
parents:
diff changeset
466 while (arpintrq.ifq_head) {
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jlarmour
parents:
diff changeset
467 s = splimp();
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jlarmour
parents:
diff changeset
468 IF_DEQUEUE(&arpintrq, m);
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jlarmour
parents:
diff changeset
469 splx(s);
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jlarmour
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diff changeset
470 if (m == 0 || (m->m_flags & M_PKTHDR) == 0)
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jlarmour
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diff changeset
471 panic("arpintr");
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jlarmour
parents:
diff changeset
472
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jlarmour
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diff changeset
473 if (m->m_len < sizeof(struct arphdr) &&
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parents:
diff changeset
474 ((m = m_pullup(m, sizeof(struct arphdr))) == NULL)) {
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jlarmour
parents:
diff changeset
475 log(LOG_ERR, "arp: runt packet -- m_pullup failed\n");
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jlarmour
parents:
diff changeset
476 continue;
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jlarmour
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diff changeset
477 }
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jlarmour
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diff changeset
478 ar = mtod(m, struct arphdr *);
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jlarmour
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diff changeset
479
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diff changeset
480 if (ntohs(ar->ar_hrd) != ARPHRD_ETHER
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diff changeset
481 && ntohs(ar->ar_hrd) != ARPHRD_IEEE802) {
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jlarmour
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diff changeset
482 log(LOG_ERR,
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jlarmour
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diff changeset
483 "arp: unknown hardware address format (0x%2D)\n",
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jlarmour
parents:
diff changeset
484 (unsigned char *)&ar->ar_hrd, "");
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jlarmour
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diff changeset
485 m_freem(m);
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jlarmour
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diff changeset
486 continue;
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diff changeset
487 }
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jlarmour
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diff changeset
488
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jlarmour
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diff changeset
489 if (m->m_pkthdr.len < sizeof(struct arphdr) + 2 * ar->ar_hln
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jlarmour
parents:
diff changeset
490 + 2 * ar->ar_pln) {
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jlarmour
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diff changeset
491 log(LOG_ERR, "arp: runt packet\n");
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jlarmour
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diff changeset
492 m_freem(m);
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jlarmour
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diff changeset
493 continue;
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diff changeset
494 }
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diff changeset
495
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jlarmour
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diff changeset
496 switch (ntohs(ar->ar_pro)) {
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jlarmour
parents:
diff changeset
497 #ifdef INET
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jlarmour
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diff changeset
498 case ETHERTYPE_IP:
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jlarmour
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diff changeset
499 in_arpinput(m);
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jlarmour
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diff changeset
500 continue;
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jlarmour
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diff changeset
501 #endif
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jlarmour
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diff changeset
502 }
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jlarmour
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diff changeset
503 m_freem(m);
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jlarmour
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diff changeset
504 }
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jlarmour
parents:
diff changeset
505 }
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jlarmour
parents:
diff changeset
506
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jlarmour
parents:
diff changeset
507 #ifdef INET
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jlarmour
parents:
diff changeset
508 /*
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jlarmour
parents:
diff changeset
509 * ARP for Internet protocols on 10 Mb/s Ethernet.
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jlarmour
parents:
diff changeset
510 * Algorithm is that given in RFC 826.
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jlarmour
parents:
diff changeset
511 * In addition, a sanity check is performed on the sender
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jlarmour
parents:
diff changeset
512 * protocol address, to catch impersonators.
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jlarmour
parents:
diff changeset
513 * We no longer handle negotiations for use of trailer protocol:
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jlarmour
parents:
diff changeset
514 * Formerly, ARP replied for protocol type ETHERTYPE_TRAIL sent
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jlarmour
parents:
diff changeset
515 * along with IP replies if we wanted trailers sent to us,
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jlarmour
parents:
diff changeset
516 * and also sent them in response to IP replies.
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jlarmour
parents:
diff changeset
517 * This allowed either end to announce the desire to receive
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jlarmour
parents:
diff changeset
518 * trailer packets.
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jlarmour
parents:
diff changeset
519 * We no longer reply to requests for ETHERTYPE_TRAIL protocol either,
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jlarmour
parents:
diff changeset
520 * but formerly didn't normally send requests.
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jlarmour
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diff changeset
521 */
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jlarmour
parents:
diff changeset
522 static int log_arp_wrong_iface = 1;
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jlarmour
parents:
diff changeset
523
1145
a571341dd6e5 Fixed all (I hope) compiler warnings
asl
parents: 208
diff changeset
524 SYSCTL_INT(_net_link_ether_inet, OID_AUTO, log_arp_wrong_iface, CTLFLAG_RW,
a571341dd6e5 Fixed all (I hope) compiler warnings
asl
parents: 208
diff changeset
525 &log_arp_wrong_iface, 0,
a571341dd6e5 Fixed all (I hope) compiler warnings
asl
parents: 208
diff changeset
526 "log arp packets arriving on the wrong interface");
208
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jlarmour
parents:
diff changeset
527
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jlarmour
parents:
diff changeset
528 static void
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jlarmour
parents:
diff changeset
529 in_arpinput(m)
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jlarmour
parents:
diff changeset
530 struct mbuf *m;
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jlarmour
parents:
diff changeset
531 {
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jlarmour
parents:
diff changeset
532 register struct ether_arp *ea;
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jlarmour
parents:
diff changeset
533 register struct arpcom *ac = (struct arpcom *)m->m_pkthdr.rcvif;
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jlarmour
parents:
diff changeset
534 struct ether_header *eh;
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jlarmour
parents:
diff changeset
535 struct iso88025_header *th = (struct iso88025_header *)0;
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jlarmour
parents:
diff changeset
536 register struct llinfo_arp *la = 0;
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jlarmour
parents:
diff changeset
537 register struct rtentry *rt;
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jlarmour
parents:
diff changeset
538 struct in_ifaddr *ia, *maybe_ia = 0;
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jlarmour
parents:
diff changeset
539 struct sockaddr_dl *sdl;
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jlarmour
parents:
diff changeset
540 struct sockaddr sa;
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jlarmour
parents:
diff changeset
541 struct in_addr isaddr, itaddr, myaddr;
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jlarmour
parents:
diff changeset
542 int op, rif_len;
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jlarmour
parents:
diff changeset
543
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jlarmour
parents:
diff changeset
544 if (m->m_len < sizeof(struct ether_arp) &&
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jlarmour
parents:
diff changeset
545 (m = m_pullup(m, sizeof(struct ether_arp))) == NULL) {
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jlarmour
parents:
diff changeset
546 log(LOG_ERR, "in_arp: runt packet -- m_pullup failed\n");
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jlarmour
parents:
diff changeset
547 return;
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jlarmour
parents:
diff changeset
548 }
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jlarmour
parents:
diff changeset
549
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jlarmour
parents:
diff changeset
550 ea = mtod(m, struct ether_arp *);
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jlarmour
parents:
diff changeset
551 op = ntohs(ea->arp_op);
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jlarmour
parents:
diff changeset
552 (void)memcpy(&isaddr, ea->arp_spa, sizeof (isaddr));
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jlarmour
parents:
diff changeset
553 (void)memcpy(&itaddr, ea->arp_tpa, sizeof (itaddr));
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jlarmour
parents:
diff changeset
554 for (ia = in_ifaddrhead.tqh_first; ia; ia = ia->ia_link.tqe_next) {
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jlarmour
parents:
diff changeset
555 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
556 * For a bridge, we want to check the address irrespective
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
557 * of the receive interface. (This will change slightly
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
558 * when we have clusters of interfaces).
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jlarmour
parents:
diff changeset
559 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
560 #ifdef BRIDGE
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
561 #define BRIDGE_TEST (do_bridge)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
562 #else
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
563 #define BRIDGE_TEST (0) /* cc will optimise the test away */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
564 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
565 if ((BRIDGE_TEST) || (ia->ia_ifp == &ac->ac_if)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
566 maybe_ia = ia;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
567 if ((itaddr.s_addr == ia->ia_addr.sin_addr.s_addr) ||
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
568 (isaddr.s_addr == ia->ia_addr.sin_addr.s_addr)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
569 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
570 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
571 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
572 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
573 if (maybe_ia == 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
574 m_freem(m);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
575 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
576 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
577 myaddr = ia ? ia->ia_addr.sin_addr : maybe_ia->ia_addr.sin_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
578 if (!bcmp((caddr_t)ea->arp_sha, (caddr_t)ac->ac_enaddr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
579 sizeof (ea->arp_sha))) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
580 m_freem(m); /* it's from me, ignore it. */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
581 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
582 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
583 if (!bcmp((caddr_t)ea->arp_sha, (caddr_t)etherbroadcastaddr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
584 sizeof (ea->arp_sha))) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
585 log(LOG_ERR,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
586 "arp: ether address is broadcast for IP address %s!\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
587 inet_ntoa(isaddr));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
588 m_freem(m);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
589 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
590 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
591 if (isaddr.s_addr == myaddr.s_addr) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
592 log(LOG_ERR,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
593 "arp: %6D is using my IP address %s!\n",
1652
2a37dbf01ca2 Clean up log messages
gthomas
parents: 1145
diff changeset
594 ea->arp_sha, inet_ntoa(isaddr));
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
595 itaddr = myaddr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
596 goto reply;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
597 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
598 la = arplookup(isaddr.s_addr, itaddr.s_addr == myaddr.s_addr, 0);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
599 if (la && (rt = la->la_rt) && (sdl = SDL(rt->rt_gateway))) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
600 /* the following is not an error when doing bridging */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
601 if (!BRIDGE_TEST && rt->rt_ifp != &ac->ac_if) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
602 if (log_arp_wrong_iface)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
603 log(LOG_ERR, "arp: %s is on %s%d but got reply from %6D on %s%d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
604 inet_ntoa(isaddr),
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
605 rt->rt_ifp->if_name, rt->rt_ifp->if_unit,
1652
2a37dbf01ca2 Clean up log messages
gthomas
parents: 1145
diff changeset
606 ea->arp_sha,
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
607 ac->ac_if.if_name, ac->ac_if.if_unit);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
608 goto reply;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
609 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
610 if (sdl->sdl_alen &&
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
611 bcmp((caddr_t)ea->arp_sha, LLADDR(sdl), sdl->sdl_alen)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
612 if (rt->rt_expire)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
613 log(LOG_INFO, "arp: %s moved from %6D to %6D on %s%d\n",
1652
2a37dbf01ca2 Clean up log messages
gthomas
parents: 1145
diff changeset
614 inet_ntoa(isaddr), (u_char *)LLADDR(sdl),
2a37dbf01ca2 Clean up log messages
gthomas
parents: 1145
diff changeset
615 ea->arp_sha,
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
616 ac->ac_if.if_name, ac->ac_if.if_unit);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
617 else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
618 log(LOG_ERR,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
619 "arp: %6D attempts to modify permanent entry for %s on %s%d\n",
1652
2a37dbf01ca2 Clean up log messages
gthomas
parents: 1145
diff changeset
620 ea->arp_sha, inet_ntoa(isaddr),
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
621 ac->ac_if.if_name, ac->ac_if.if_unit);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
622 goto reply;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
623 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
624 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
625 (void)memcpy(LLADDR(sdl), ea->arp_sha, sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
626 sdl->sdl_alen = sizeof(ea->arp_sha);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
627 sdl->sdl_rcf = (u_short)0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
628 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
629 * If we receive an arp from a token-ring station over
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
630 * a token-ring nic then try to save the source
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
631 * routing info.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
632 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
633 if (ac->ac_if.if_type == IFT_ISO88025) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
634 th = (struct iso88025_header *)m->m_pkthdr.header;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
635 rif_len = TR_RCF_RIFLEN(th->rcf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
636 if ((th->iso88025_shost[0] & TR_RII) &&
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
637 (rif_len > 2)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
638 sdl->sdl_rcf = th->rcf;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
639 sdl->sdl_rcf ^= htons(TR_RCF_DIR);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
640 memcpy(sdl->sdl_route, th->rd, rif_len - 2);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
641 sdl->sdl_rcf &= ~htons(TR_RCF_BCST_MASK);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
642 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
643 * Set up source routing information for
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
644 * reply packet (XXX)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
645 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
646 m->m_data -= rif_len;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
647 m->m_len += rif_len;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
648 m->m_pkthdr.len += rif_len;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
649 } else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
650 th->iso88025_shost[0] &= ~TR_RII;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
651 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
652 m->m_data -= 8;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
653 m->m_len += 8;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
654 m->m_pkthdr.len += 8;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
655 th->rcf = sdl->sdl_rcf;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
656 } else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
657 sdl->sdl_rcf = (u_short)0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
658 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
659 if (rt->rt_expire)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
660 rt->rt_expire = time_second + arpt_keep;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
661 rt->rt_flags &= ~RTF_REJECT;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
662 la->la_asked = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
663 if (la->la_hold) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
664 (*ac->ac_if.if_output)(&ac->ac_if, la->la_hold,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
665 rt_key(rt), rt);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
666 la->la_hold = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
667 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
668 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
669 reply:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
670 if (op != ARPOP_REQUEST) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
671 m_freem(m);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
672 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
673 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
674 if (itaddr.s_addr == myaddr.s_addr) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
675 /* I am the target */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
676 (void)memcpy(ea->arp_tha, ea->arp_sha, sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
677 (void)memcpy(ea->arp_sha, ac->ac_enaddr, sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
678 } else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
679 la = arplookup(itaddr.s_addr, 0, SIN_PROXY);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
680 if (la == NULL) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
681 struct sockaddr_in sin;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
682
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
683 if (!arp_proxyall) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
684 m_freem(m);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
685 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
686 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
687
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
688 bzero(&sin, sizeof sin);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
689 sin.sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
690 sin.sin_len = sizeof sin;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
691 sin.sin_addr = itaddr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
692
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
693 rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
694 if (!rt) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
695 m_freem(m);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
696 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
697 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
698 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
699 * Don't send proxies for nodes on the same interface
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
700 * as this one came out of, or we'll get into a fight
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
701 * over who claims what Ether address.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
702 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
703 if (rt->rt_ifp == &ac->ac_if) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
704 rtfree(rt);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
705 m_freem(m);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
706 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
707 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
708 (void)memcpy(ea->arp_tha, ea->arp_sha, sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
709 (void)memcpy(ea->arp_sha, ac->ac_enaddr, sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
710 rtfree(rt);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
711 #ifdef DEBUG_PROXY
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
712 printf("arp: proxying for %s\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
713 inet_ntoa(itaddr));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
714 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
715 } else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
716 rt = la->la_rt;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
717 (void)memcpy(ea->arp_tha, ea->arp_sha, sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
718 sdl = SDL(rt->rt_gateway);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
719 (void)memcpy(ea->arp_sha, LLADDR(sdl), sizeof(ea->arp_sha));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
720 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
721 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
722
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
723 (void)memcpy(ea->arp_tpa, ea->arp_spa, sizeof(ea->arp_spa));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
724 (void)memcpy(ea->arp_spa, &itaddr, sizeof(ea->arp_spa));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
725 ea->arp_op = htons(ARPOP_REPLY);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
726 ea->arp_pro = htons(ETHERTYPE_IP); /* let's be sure! */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
727 switch (ac->ac_if.if_type) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
728 case IFT_ISO88025:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
729 /* Re-arrange the source/dest address */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
730 memcpy(th->iso88025_dhost, th->iso88025_shost,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
731 sizeof(th->iso88025_dhost));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
732 memcpy(th->iso88025_shost, ac->ac_enaddr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
733 sizeof(th->iso88025_shost));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
734 /* Set the source routing bit if neccesary */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
735 if (th->iso88025_dhost[0] & TR_RII) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
736 th->iso88025_dhost[0] &= ~TR_RII;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
737 if (TR_RCF_RIFLEN(th->rcf) > 2)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
738 th->iso88025_shost[0] |= TR_RII;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
739 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
740 /* Copy the addresses, ac and fc into sa_data */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
741 memcpy(sa.sa_data, th->iso88025_dhost,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
742 sizeof(th->iso88025_dhost) * 2);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
743 sa.sa_data[(sizeof(th->iso88025_dhost) * 2)] = TR_AC;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
744 sa.sa_data[(sizeof(th->iso88025_dhost) * 2) + 1] = TR_LLC_FRAME;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
745 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
746 case IFT_ETHER:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
747 case IFT_FDDI:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
748 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
749 * May not be correct for types not explictly
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
750 * listed, but it is our best guess.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
751 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
752 default:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
753 eh = (struct ether_header *)sa.sa_data;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
754 (void)memcpy(eh->ether_dhost, ea->arp_tha,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
755 sizeof(eh->ether_dhost));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
756 eh->ether_type = htons(ETHERTYPE_ARP);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
757 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
758 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
759 sa.sa_family = AF_UNSPEC;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
760 sa.sa_len = sizeof(sa);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
761 (*ac->ac_if.if_output)(&ac->ac_if, m, &sa, (struct rtentry *)0);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
762 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
763 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
764 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
765
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
766 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
767 * Free an arp entry.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
768 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
769 static void
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
770 arptfree(la)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
771 register struct llinfo_arp *la;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
772 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
773 register struct rtentry *rt = la->la_rt;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
774 register struct sockaddr_dl *sdl;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
775 if (rt == 0)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
776 panic("arptfree");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
777 if (rt->rt_refcnt > 0 && (sdl = SDL(rt->rt_gateway)) &&
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
778 sdl->sdl_family == AF_LINK) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
779 sdl->sdl_alen = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
780 la->la_asked = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
781 rt->rt_flags &= ~RTF_REJECT;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
782 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
783 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
784 rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0, rt_mask(rt),
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
785 0, (struct rtentry **)0);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
786 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
787 /*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
788 * Lookup or enter a new address in arptab.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
789 */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
790 static struct llinfo_arp *
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
791 arplookup(addr, create, proxy)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
792 u_long addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
793 int create, proxy;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
794 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
795 register struct rtentry *rt;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
796 static struct sockaddr_inarp sin = {sizeof(sin), AF_INET };
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
797 const char *why = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
798
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
799 sin.sin_addr.s_addr = addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
800 sin.sin_other = proxy ? SIN_PROXY : 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
801 rt = rtalloc1((struct sockaddr *)&sin, create, 0UL);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
802 if (rt == 0)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
803 return (0);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
804 rt->rt_refcnt--;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
805
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
806 if (rt->rt_flags & RTF_GATEWAY)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
807 why = "host is not on local network";
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
808 else if ((rt->rt_flags & RTF_LLINFO) == 0)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
809 why = "could not allocate llinfo";
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
810 else if (rt->rt_gateway->sa_family != AF_LINK)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
811 why = "gateway route is not ours";
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
812
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
813 if (why && create) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
814 log(LOG_DEBUG, "arplookup %s failed: %s\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
815 inet_ntoa(sin.sin_addr), why);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
816 return 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
817 } else if (why) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
818 return 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
819 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
820 return ((struct llinfo_arp *)rt->rt_llinfo);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
821 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
822
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
823 void
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
824 arp_ifinit(ac, ifa)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
825 struct arpcom *ac;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
826 struct ifaddr *ifa;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
827 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
828 if (ntohl(IA_SIN(ifa)->sin_addr.s_addr) != INADDR_ANY)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
829 arprequest(ac, &IA_SIN(ifa)->sin_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
830 &IA_SIN(ifa)->sin_addr, ac->ac_enaddr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
831 ifa->ifa_rtrequest = arp_rtrequest;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
832 ifa->ifa_flags |= RTF_CLONING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
833 }