Mercurial > flash_v2

annotate packages/net/tcpip/current/src/lib/bootp_support.c @ 126:518f42066aba ecos-sw-2000-09-19

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Merge from eCos master repository on 2000-09-19-06:25:26-BST
author jlarmour
date Tue, 19 Sep 2000 05:53:51 +0000
parents 6ed91473a1cd
children a9ac27ec7abc
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1 //==========================================================================
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2 //
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3 // lib/bootp_support.c
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4 //
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5 // Minimal BOOTP functions
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //####BSDCOPYRIGHTBEGIN####
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32 //
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33 // -------------------------------------------
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34 //
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35 // Portions of this software may have been derived from OpenBSD or other sources,
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36 // and are covered by the appropriate copyright disclaimers included herein.
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37 //
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38 // -------------------------------------------
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39 //
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40 //####BSDCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): gthomas
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45 // Contributors: gthomas
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46 // Date: 2000-01-10
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47 // Purpose:
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48 // Description:
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49 //
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
110
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55 // BOOTP support (and a little DHCP support also)
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56
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57 #include <pkgconf/system.h>
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58 #include <pkgconf/net.h>
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59
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60 #include <network.h>
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61
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62 #ifndef CYGPKG_LIBC_STDIO
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63 #define perror(s) diag_printf(#s ": %s\n", strerror(errno))
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64 #endif
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65
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66 // This function sets up the interface it the simplest configuration.
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67 // Just enough to broadcast a BOOTP request and get a response.
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68 // It returns 'true' if a response was obtained.
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69 cyg_bool_t
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70 do_bootp(const char *intf, struct bootp *recv)
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71 {
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72 struct sockaddr_in *addrp;
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73 struct ifreq ifr;
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74 struct sockaddr_in cli_addr, serv_addr, bootp_server_addr;
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75 struct ecos_rtentry route;
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76 int s, addrlen;
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77 int one = 1;
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78 struct bootp bootp_xmit;
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79 unsigned char mincookie[] = {99,130,83,99,255} ;
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80 struct timeval tv;
110
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81 cyg_bool_t retcode = true;
97
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82
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83 // Ensure clean slate
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84 route_reinit(); // Force any existing routes to be forgotten
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85
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86 s = socket(AF_INET, SOCK_DGRAM, 0);
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87 if (s < 0) {
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88 perror("socket");
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89 return false;
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90 }
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91
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92 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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93 perror("setsockopt");
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94 return false;
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95 }
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96
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97 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
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98 memset(addrp, 0, sizeof(*addrp));
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99 addrp->sin_family = AF_INET;
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100 addrp->sin_len = sizeof(*addrp);
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101 addrp->sin_port = 0;
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102 addrp->sin_addr.s_addr = INADDR_ANY;
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103
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104 strcpy(ifr.ifr_name, intf);
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105 if (ioctl(s, SIOCSIFADDR, &ifr)) {
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106 perror("SIOCSIFADDR");
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107 return false;
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108 }
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109
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110 if (ioctl(s, SIOCSIFNETMASK, &ifr)) {
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111 perror("SIOCSIFNETMASK");
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112 return false;
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113 }
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114
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115 /* the broadcast address is 255.255.255.255 */
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116 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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117 if (ioctl(s, SIOCSIFBRDADDR, &ifr)) {
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118 perror("SIOCSIFBRDADDR");
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119 return false;
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120 }
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121
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122 ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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123 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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124 perror("SIOCSIFFLAGS");
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125 return false;
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126 }
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127
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128 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
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129 perror("SIOCGIFHWADDR");
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130 return false;
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131 }
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132
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133 // Set up routing
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134 /* the broadcast address is 255.255.255.255 */
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135 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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136 memset(&route, 0, sizeof(route));
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137 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
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138
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139 addrp->sin_family = AF_INET;
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140 addrp->sin_port = 0;
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141 addrp->sin_addr.s_addr = INADDR_ANY;
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142 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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143 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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144
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145 route.rt_dev = ifr.ifr_name;
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146 route.rt_flags = RTF_UP|RTF_GATEWAY;
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147 route.rt_metric = 0;
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148
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149 if (ioctl(s, SIOCADDRT, &route)) {
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diff changeset
150 if (errno != EEXIST) {
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diff changeset
151 perror("SIOCADDRT 3");
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152 return false;
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153 }
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154 }
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155
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156 memset((char *) &cli_addr, 0, sizeof(cli_addr));
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157 cli_addr.sin_family = AF_INET;
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158 cli_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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159 cli_addr.sin_port = htons(IPPORT_BOOTPC);
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160
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161 if(bind(s, (struct sockaddr *) &cli_addr, sizeof(cli_addr)) < 0) {
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162 perror("bind error");
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163 return false;
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164 }
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165 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
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166 perror("setsockopt SO_REUSEADDR");
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167 return false;
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168 }
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169 if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one))) {
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170 perror("setsockopt SO_REUSEPORT");
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171 return false;
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172 }
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173
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174 memset((char *) &serv_addr, 0, sizeof(serv_addr));
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175 serv_addr.sin_family = AF_INET;
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176 serv_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
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177 serv_addr.sin_port = htons(IPPORT_BOOTPS);
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178
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179 // Fill in the BOOTP request
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180 bzero(&bootp_xmit, sizeof(bootp_xmit));
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181 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
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182 perror("SIOCGIFHWADDR");
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183 return false;
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184 }
115
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185 bootp_xmit.bp_htype = HTYPE_ETHERNET;
97
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186 bootp_xmit.bp_hlen = IFHWADDRLEN;
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187 bcopy(ifr.ifr_hwaddr.sa_data, &bootp_xmit.bp_chaddr, bootp_xmit.bp_hlen);
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188
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189 bootp_xmit.bp_secs = 0;
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190 bcopy(mincookie, bootp_xmit.bp_vend, sizeof(mincookie));
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191
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192 bootp_xmit.bp_op = BOOTREQUEST;
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193
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194 if(sendto(s, &bootp_xmit, sizeof(struct bootp), 0,
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195 (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
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196 perror("sendto error");
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197 return false;
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198 }
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199
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200 tv.tv_sec = 5;
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201 tv.tv_usec = 0;
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202 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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203
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204 addrlen = sizeof(bootp_server_addr);
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205 if (recvfrom(s, recv, sizeof(struct bootp), 0,
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206 (struct sockaddr *)&bootp_server_addr, &addrlen) < 0) {
110
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207 // This is an "acceptable" error, it means there is no server for
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208 // us: do not initialize the interface.
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209 retcode = false;
97
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210 }
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211
110
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212 // Shut things down regardless of success of rx, otherwise other
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213 // interfaces cannot be initialised!
97
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214 memset(addrp, 0, sizeof(*addrp));
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215 addrp->sin_family = AF_INET;
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216 addrp->sin_len = sizeof(*addrp);
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217 addrp->sin_port = 0;
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218 addrp->sin_addr.s_addr = INADDR_ANY;
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219
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220 strcpy(ifr.ifr_name, intf);
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221 if (ioctl(s, SIOCDIFADDR, &ifr)) {
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222 perror("SIOCDIFADDR");
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223 }
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224
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225 // Shut down interface so it can be reinitialized
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226 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
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227 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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228 perror("SIOCSIFFLAGS");
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229 return false;
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230 }
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231
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232 // All done with socket
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233 close(s);
110
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234 return retcode;
97
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235 }
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236
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237 static char *_bootp_op[] = {"", "REQUEST", "REPLY"};
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238 static char *_bootp_hw_type[] = {"", "Ethernet", "Exp Ethernet", "AX25",
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239 "Pronet", "Chaos", "IEEE802", "Arcnet"};
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240
110
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241 static char *_dhcpmsgs[] = {"","DISCOVER", "OFFER", "REQUEST", "DECLINE",
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242 "ACK", "NAK", "RELEASE" };
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243
97
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244 void
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245 show_bootp(const char *intf, struct bootp *bp)
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246 {
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247 int i, len;
110
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248 unsigned char *op, *ap = 0, optover;
97
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249 unsigned char name[128];
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250 struct in_addr addr[32];
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251 diag_printf("BOOTP[%s] op: %s\n", intf, _bootp_op[bp->bp_op]);
110
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252 diag_printf(" htype: %s\n", _bootp_hw_type[bp->bp_htype]);
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253 diag_printf(" hlen: %d\n", bp->bp_hlen );
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254 diag_printf(" hops: %d\n", bp->bp_hops );
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255 diag_printf(" xid: 0x%x\n", bp->bp_xid );
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256 diag_printf(" secs: %d\n", bp->bp_secs );
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257 diag_printf(" flags: 0x%x\n", bp->bp_flags );
97
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258 diag_printf(" hw_addr: ");
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259 for (i = 0; i < bp->bp_hlen; i++) {
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260 diag_printf("%02x", bp->bp_chaddr[i]);
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261 if (i != (bp->bp_hlen-1)) diag_printf(":");
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262 }
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263 diag_printf("\n");
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264 diag_printf(" client IP: %s\n", inet_ntoa(bp->bp_ciaddr));
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265 diag_printf(" my IP: %s\n", inet_ntoa(bp->bp_yiaddr));
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266 diag_printf(" server IP: %s\n", inet_ntoa(bp->bp_siaddr));
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267 diag_printf(" gateway IP: %s\n", inet_ntoa(bp->bp_giaddr));
110
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268
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269 optover = 0; // See whether sname and file are overridden for options
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270 (void)get_bootp_option( bp, TAG_DHCP_OPTOVER, &optover );
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271 if ( !(1 & optover) && bp->bp_sname[0] )
97
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272 diag_printf(" server: %s\n", bp->bp_sname);
110
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273 if ( ! (2 & optover) && bp->bp_file[0] )
97
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274 diag_printf(" file: %s\n", bp->bp_file);
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275 if (bp->bp_vend[0]) {
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276 diag_printf(" options:\n");
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277 op = &bp->bp_vend[4];
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278 while (*op != TAG_END) {
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diff changeset
279 switch (*op) {
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280 case TAG_SUBNET_MASK:
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281 case TAG_GATEWAY:
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282 case TAG_IP_BROADCAST:
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283 case TAG_DOMAIN_SERVER:
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284 ap = (unsigned char *)&addr[0];
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285 len = *(op+1);
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286 for (i = 0; i < len; i++) {
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287 *ap++ = *(op+i+2);
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288 }
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289 if (*op == TAG_SUBNET_MASK) ap = " subnet mask";
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290 if (*op == TAG_GATEWAY) ap = " gateway";
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291 if (*op == TAG_IP_BROADCAST) ap = " IP broadcast";
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292 if (*op == TAG_DOMAIN_SERVER) ap = "domain server";
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diff changeset
293 diag_printf(" %s: ", ap);
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294 ap = (unsigned char *)&addr[0];
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diff changeset
295 while (len > 0) {
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296 diag_printf("%s", inet_ntoa(*(struct in_addr *)ap));
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diff changeset
297 len -= sizeof(struct in_addr);
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298 ap += sizeof(struct in_addr);
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diff changeset
299 if (len) diag_printf(", ");
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diff changeset
300 }
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parents:
diff changeset
301 diag_printf("\n");
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302 break;
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parents:
diff changeset
303 case TAG_DOMAIN_NAME:
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304 case TAG_HOST_NAME:
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305 for (i = 0; i < *(op+1); i++) {
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306 name[i] = *(op+i+2);
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307 }
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308 name[*(op+1)] = '\0';
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309 if (*op == TAG_DOMAIN_NAME) ap = " domain name";
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310 if (*op == TAG_HOST_NAME) ap = " host name";
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311 diag_printf(" %s: %s\n", ap, name);
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312 break;
110
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diff changeset
313 case TAG_DHCP_MESS_TYPE:
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diff changeset
314 diag_printf(" DHCP message: %d %s\n",
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diff changeset
315 op[2], _dhcpmsgs[op[2]] );
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diff changeset
316 break;
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diff changeset
317 case TAG_DHCP_REQ_IP:
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diff changeset
318 diag_printf(" DHCP requested ip: %d.%d.%d.%d\n",
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diff changeset
319 op[2], op[3], op[4], op[5] );
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diff changeset
320 break;
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diff changeset
321 case TAG_DHCP_LEASE_TIME :
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diff changeset
322 case TAG_DHCP_RENEWAL_TIME :
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diff changeset
323 case TAG_DHCP_REBIND_TIME :
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diff changeset
324 diag_printf(" DHCP time %d: %d\n",
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325 *op, ((((((op[2]<<8)+op[3])<<8)+op[4])<<8)+op[5]) );
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diff changeset
326
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diff changeset
327 break;
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diff changeset
328 case TAG_DHCP_SERVER_ID :
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diff changeset
329 diag_printf(" DHCP server id: %d.%d.%d.%d\n",
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330 op[2], op[3], op[4], op[5] );
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diff changeset
331 break;
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diff changeset
332
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diff changeset
333 case TAG_DHCP_OPTOVER :
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diff changeset
334 case TAG_DHCP_PARM_REQ_LIST:
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diff changeset
335 case TAG_DHCP_TEXT_MESSAGE :
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diff changeset
336 case TAG_DHCP_MAX_MSGSZ :
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diff changeset
337 case TAG_DHCP_CLASSID :
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diff changeset
338 case TAG_DHCP_CLIENTID :
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diff changeset
339 diag_printf(" DHCP option: %x/%d.%d:", *op, *op, *(op+1));
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diff changeset
340 if ( 1 == op[1] )
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diff changeset
341 diag_printf( " %d", op[2] );
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diff changeset
342 else if ( 2 == op[1] )
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diff changeset
343 diag_printf( " %d", (op[2]<<8)+op[3] );
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diff changeset
344 else if ( 4 == op[1] )
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diff changeset
345 diag_printf( " %d", ((((((op[2]<<8)+op[3])<<8)+op[4])<<8)+op[5]) );
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diff changeset
346 else
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diff changeset
347 for ( i = 2; i < 2 + op[1]; i++ )
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diff changeset
348 diag_printf(" %d",op[i]);
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diff changeset
349 diag_printf("\n");
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diff changeset
350 break;
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diff changeset
351
97
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352 default:
110
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diff changeset
353 diag_printf("Unknown option: %x/%d.%d:", *op, *op, *(op+1));
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354 for ( i = 2; i < 2 + op[1]; i++ )
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diff changeset
355 diag_printf(" %d",op[i]);
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diff changeset
356 diag_printf("\n");
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diff changeset
357 break;
97
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diff changeset
358 }
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359 op += *(op+1)+2;
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diff changeset
360 }
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diff changeset
361 }
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diff changeset
362 }
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diff changeset
363
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364 cyg_bool_t
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365 get_bootp_option(struct bootp *bp, unsigned char tag, void *opt)
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366 {
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367 unsigned char *val = (unsigned char *)opt;
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diff changeset
368 int i;
110
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diff changeset
369 cyg_uint8 optover;
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diff changeset
370
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371 #define SCANTAG( ptr ) CYG_MACRO_START \
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diff changeset
372 unsigned char *op = (ptr); \
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diff changeset
373 while (*op != TAG_END) { \
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diff changeset
374 if (*op == tag) { \
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diff changeset
375 for (i = 0; i < *(op+1); i++) { \
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diff changeset
376 *val++ = *(op+i+2); \
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diff changeset
377 } \
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diff changeset
378 return true; \
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diff changeset
379 } \
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diff changeset
380 op += *(op+1)+2; \
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diff changeset
381 } \
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diff changeset
382 CYG_MACRO_END
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diff changeset
383
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diff changeset
384 SCANTAG( &bp->bp_vend[4] );
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diff changeset
385
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diff changeset
386 if ( TAG_DHCP_OPTOVER == tag ) // prevent recursion > once
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diff changeset
387 return false;
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diff changeset
388 // else, look for that tag to see if there's more...
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diff changeset
389 optover = 0;
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diff changeset
390 if ( ! get_bootp_option( bp, TAG_DHCP_OPTOVER, &optover ) )
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diff changeset
391 return false;
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diff changeset
392
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diff changeset
393 if ( 1 & optover ) // then the file field also holds options
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diff changeset
394 SCANTAG( &bp->bp_file[0] );
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diff changeset
395
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diff changeset
396 if ( 2 & optover ) // then the sname field also holds options
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diff changeset
397 SCANTAG( &bp->bp_sname[0] );
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diff changeset
398
97
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parents:
diff changeset
399 return false;
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parents:
diff changeset
400 }
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parents:
diff changeset
401
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diff changeset
402 // [Re]initialize the network interface with the info passed from BOOTP
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diff changeset
403 cyg_bool_t
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parents:
diff changeset
404 init_net(const char *intf, struct bootp *bp)
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parents:
diff changeset
405 {
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diff changeset
406 struct sockaddr_in *addrp;
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parents:
diff changeset
407 struct ifreq ifr;
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diff changeset
408 int s;
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diff changeset
409 int one = 1;
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diff changeset
410 struct ecos_rtentry route;
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parents:
diff changeset
411 struct in_addr netmask, gateway;
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parents:
diff changeset
412
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diff changeset
413 s = socket(AF_INET, SOCK_DGRAM, 0);
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parents:
diff changeset
414 if (s < 0) {
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parents:
diff changeset
415 perror("socket");
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diff changeset
416 return false;
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parents:
diff changeset
417 }
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parents:
diff changeset
418
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diff changeset
419 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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parents:
diff changeset
420 perror("setsockopt");
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421 return false;
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parents:
diff changeset
422 }
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parents:
diff changeset
423
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424 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
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diff changeset
425 memset(addrp, 0, sizeof(*addrp));
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diff changeset
426 addrp->sin_family = AF_INET;
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diff changeset
427 addrp->sin_len = sizeof(*addrp);
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diff changeset
428 addrp->sin_port = 0;
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diff changeset
429 addrp->sin_addr = bp->bp_yiaddr; // The address BOOTP gave us
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parents:
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430
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431 strcpy(ifr.ifr_name, intf);
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432 if (ioctl(s, SIOCSIFADDR, &ifr)) {
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433 perror("SIOCIFADDR");
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434 return false;
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435 }
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436
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437 if (get_bootp_option(bp, TAG_SUBNET_MASK, &addrp->sin_addr)) {
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438 netmask = addrp->sin_addr;
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439 if (ioctl(s, SIOCSIFNETMASK, &ifr)) {
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440 perror("SIOCSIFNETMASK");
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441 return false;
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442 }
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443 }
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444
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445 if (get_bootp_option(bp, TAG_IP_BROADCAST, &addrp->sin_addr)) {
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446 if (ioctl(s, SIOCSIFBRDADDR, &ifr)) {
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447 perror("SIOCSIFBRDADDR");
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448 return false;
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449 }
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450
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451 }
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452
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453 ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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454 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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455 perror("SIOCSIFFLAGS");
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456 return false;
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457 }
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458
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459 // Set up routing
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460 if (get_bootp_option(bp, TAG_GATEWAY, &gateway)) {
112
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461 // ...and it's a nonzero address...
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462 if ( 0 != gateway.s_addr ) {
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463 memset(&route, 0, sizeof(route));
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464 addrp->sin_family = AF_INET;
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465 addrp->sin_port = 0;
126
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466 addrp->sin_len = sizeof(*addrp);
112
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467 addrp->sin_addr.s_addr = 0; // Use 0,0,GATEWAY for the default route
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468 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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469 addrp->sin_addr.s_addr = 0;
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470 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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471 addrp->sin_addr = gateway;
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472 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
97
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473
112
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474 route.rt_dev = ifr.ifr_name;
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475 route.rt_flags = RTF_UP|RTF_GATEWAY;
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476 route.rt_metric = 0;
97
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477
112
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478 if (ioctl(s, SIOCADDRT, &route)) {
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479 diag_printf("Route - dst: %s",
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480 inet_ntoa(((struct sockaddr_in *)&route.rt_dst)->sin_addr));
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481 diag_printf(", mask: %s",
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482 inet_ntoa(((struct sockaddr_in *)&route.rt_genmask)->sin_addr));
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483 diag_printf(", gateway: %s\n",
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484 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
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485 if (errno != EEXIST) {
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486 perror("SIOCADDRT 3");
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487 return false;
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488 }
97
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489 }
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490 }
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491 }
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492 close(s);
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493 return true;
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494 }