Mercurial > flash_v2

annotate packages/net/tcpip/current/src/lib/bootp_support.c @ 112:02ea4320376c ecos-sw-2000-07-21

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Merge from eCos master repository on 2000-07-21-21:01:39-BST
author jlarmour
date Fri, 21 Jul 2000 21:34:11 +0000
parents 84e4bde58b26
children 6ed91473a1cd
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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
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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 // This function sets up the interface it the simplest configuration.
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63 // Just enough to broadcast a BOOTP request and get a response.
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64 // It returns 'true' if a response was obtained.
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65 cyg_bool_t
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66 do_bootp(const char *intf, struct bootp *recv)
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67 {
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68 struct sockaddr_in *addrp;
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69 struct ifreq ifr;
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70 struct sockaddr_in cli_addr, serv_addr, bootp_server_addr;
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71 struct ecos_rtentry route;
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72 int s, addrlen;
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73 int one = 1;
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74 struct bootp bootp_xmit;
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75 unsigned char mincookie[] = {99,130,83,99,255} ;
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76 struct timeval tv;
110
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77 cyg_bool_t retcode = true;
97
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78
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79 // Ensure clean slate
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80 route_reinit(); // Force any existing routes to be forgotten
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81
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82 s = socket(AF_INET, SOCK_DGRAM, 0);
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83 if (s < 0) {
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84 perror("socket");
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85 return false;
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86 }
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87
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88 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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89 perror("setsockopt");
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90 return false;
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91 }
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92
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93 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
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94 memset(addrp, 0, sizeof(*addrp));
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95 addrp->sin_family = AF_INET;
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96 addrp->sin_len = sizeof(*addrp);
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97 addrp->sin_port = 0;
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98 addrp->sin_addr.s_addr = INADDR_ANY;
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99
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100 strcpy(ifr.ifr_name, intf);
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101 if (ioctl(s, SIOCSIFADDR, &ifr)) {
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102 perror("SIOCSIFADDR");
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103 return false;
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104 }
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105
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106 if (ioctl(s, SIOCSIFNETMASK, &ifr)) {
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107 perror("SIOCSIFNETMASK");
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108 return false;
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109 }
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110
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111 /* the broadcast address is 255.255.255.255 */
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112 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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113 if (ioctl(s, SIOCSIFBRDADDR, &ifr)) {
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114 perror("SIOCSIFBRDADDR");
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115 return false;
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116 }
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117
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118 ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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119 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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120 perror("SIOCSIFFLAGS");
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121 return false;
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122 }
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123
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124 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
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125 perror("SIOCGIFHWADDR");
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126 return false;
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127 }
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128
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129 // Set up routing
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130 /* the broadcast address is 255.255.255.255 */
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131 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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132 memset(&route, 0, sizeof(route));
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133 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
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134
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135 addrp->sin_family = AF_INET;
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136 addrp->sin_port = 0;
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137 addrp->sin_addr.s_addr = INADDR_ANY;
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138 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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139 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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140
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141 route.rt_dev = ifr.ifr_name;
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142 route.rt_flags = RTF_UP|RTF_GATEWAY;
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143 route.rt_metric = 0;
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144
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145 if (ioctl(s, SIOCADDRT, &route)) {
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146 if (errno != EEXIST) {
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147 perror("SIOCADDRT 3");
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148 return false;
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149 }
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150 }
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151
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152 memset((char *) &cli_addr, 0, sizeof(cli_addr));
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153 cli_addr.sin_family = AF_INET;
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154 cli_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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155 cli_addr.sin_port = htons(IPPORT_BOOTPC);
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156
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157 if(bind(s, (struct sockaddr *) &cli_addr, sizeof(cli_addr)) < 0) {
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158 perror("bind error");
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159 return false;
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160 }
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161 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
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162 perror("setsockopt SO_REUSEADDR");
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163 return false;
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164 }
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165 if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one))) {
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166 perror("setsockopt SO_REUSEPORT");
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167 return false;
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168 }
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169
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170 memset((char *) &serv_addr, 0, sizeof(serv_addr));
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171 serv_addr.sin_family = AF_INET;
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172 serv_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
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173 serv_addr.sin_port = htons(IPPORT_BOOTPS);
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174
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175 // Fill in the BOOTP request
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176 bzero(&bootp_xmit, sizeof(bootp_xmit));
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177 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
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178 perror("SIOCGIFHWADDR");
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179 return false;
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180 }
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181 bootp_xmit.bp_htype = ifr.ifr_hwaddr.sa_family;
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182 bootp_xmit.bp_hlen = IFHWADDRLEN;
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183 bcopy(ifr.ifr_hwaddr.sa_data, &bootp_xmit.bp_chaddr, bootp_xmit.bp_hlen);
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184
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185 bootp_xmit.bp_secs = 0;
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186 bcopy(mincookie, bootp_xmit.bp_vend, sizeof(mincookie));
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187
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188 bootp_xmit.bp_op = BOOTREQUEST;
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189
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190 if(sendto(s, &bootp_xmit, sizeof(struct bootp), 0,
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191 (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
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192 perror("sendto error");
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193 return false;
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194 }
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195
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196 tv.tv_sec = 5;
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197 tv.tv_usec = 0;
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198 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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199
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200 addrlen = sizeof(bootp_server_addr);
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201 if (recvfrom(s, recv, sizeof(struct bootp), 0,
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202 (struct sockaddr *)&bootp_server_addr, &addrlen) < 0) {
110
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203 // This is an "acceptable" error, it means there is no server for
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204 // us: do not initialize the interface.
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205 retcode = false;
97
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206 }
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207
110
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208 // Shut things down regardless of success of rx, otherwise other
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209 // interfaces cannot be initialised!
97
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210 memset(addrp, 0, sizeof(*addrp));
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211 addrp->sin_family = AF_INET;
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212 addrp->sin_len = sizeof(*addrp);
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213 addrp->sin_port = 0;
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214 addrp->sin_addr.s_addr = INADDR_ANY;
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215
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216 strcpy(ifr.ifr_name, intf);
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217 if (ioctl(s, SIOCDIFADDR, &ifr)) {
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218 perror("SIOCDIFADDR");
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219 }
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220
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221 // Shut down interface so it can be reinitialized
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222 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
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223 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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224 perror("SIOCSIFFLAGS");
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225 return false;
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226 }
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227
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228 // All done with socket
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229 close(s);
110
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230 return retcode;
97
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231 }
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232
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233 static char *_bootp_op[] = {"", "REQUEST", "REPLY"};
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234 static char *_bootp_hw_type[] = {"", "Ethernet", "Exp Ethernet", "AX25",
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235 "Pronet", "Chaos", "IEEE802", "Arcnet"};
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236
110
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237 static char *_dhcpmsgs[] = {"","DISCOVER", "OFFER", "REQUEST", "DECLINE",
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238 "ACK", "NAK", "RELEASE" };
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239
97
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240 void
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241 show_bootp(const char *intf, struct bootp *bp)
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242 {
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243 int i, len;
110
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244 unsigned char *op, *ap = 0, optover;
97
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245 unsigned char name[128];
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246 struct in_addr addr[32];
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247 diag_printf("BOOTP[%s] op: %s\n", intf, _bootp_op[bp->bp_op]);
110
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248 diag_printf(" htype: %s\n", _bootp_hw_type[bp->bp_htype]);
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249 diag_printf(" hlen: %d\n", bp->bp_hlen );
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250 diag_printf(" hops: %d\n", bp->bp_hops );
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251 diag_printf(" xid: 0x%x\n", bp->bp_xid );
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252 diag_printf(" secs: %d\n", bp->bp_secs );
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253 diag_printf(" flags: 0x%x\n", bp->bp_flags );
97
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254 diag_printf(" hw_addr: ");
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255 for (i = 0; i < bp->bp_hlen; i++) {
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256 diag_printf("%02x", bp->bp_chaddr[i]);
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257 if (i != (bp->bp_hlen-1)) diag_printf(":");
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258 }
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259 diag_printf("\n");
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260 diag_printf(" client IP: %s\n", inet_ntoa(bp->bp_ciaddr));
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261 diag_printf(" my IP: %s\n", inet_ntoa(bp->bp_yiaddr));
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262 diag_printf(" server IP: %s\n", inet_ntoa(bp->bp_siaddr));
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263 diag_printf(" gateway IP: %s\n", inet_ntoa(bp->bp_giaddr));
110
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264
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265 optover = 0; // See whether sname and file are overridden for options
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266 (void)get_bootp_option( bp, TAG_DHCP_OPTOVER, &optover );
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267 if ( !(1 & optover) && bp->bp_sname[0] )
97
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268 diag_printf(" server: %s\n", bp->bp_sname);
110
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269 if ( ! (2 & optover) && bp->bp_file[0] )
97
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270 diag_printf(" file: %s\n", bp->bp_file);
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271 if (bp->bp_vend[0]) {
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272 diag_printf(" options:\n");
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273 op = &bp->bp_vend[4];
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274 while (*op != TAG_END) {
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275 switch (*op) {
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276 case TAG_SUBNET_MASK:
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277 case TAG_GATEWAY:
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278 case TAG_IP_BROADCAST:
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279 case TAG_DOMAIN_SERVER:
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280 ap = (unsigned char *)&addr[0];
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281 len = *(op+1);
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282 for (i = 0; i < len; i++) {
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283 *ap++ = *(op+i+2);
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284 }
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285 if (*op == TAG_SUBNET_MASK) ap = " subnet mask";
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286 if (*op == TAG_GATEWAY) ap = " gateway";
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287 if (*op == TAG_IP_BROADCAST) ap = " IP broadcast";
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288 if (*op == TAG_DOMAIN_SERVER) ap = "domain server";
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289 diag_printf(" %s: ", ap);
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diff changeset
290 ap = (unsigned char *)&addr[0];
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parents:
diff changeset
291 while (len > 0) {
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292 diag_printf("%s", inet_ntoa(*(struct in_addr *)ap));
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diff changeset
293 len -= sizeof(struct in_addr);
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diff changeset
294 ap += sizeof(struct in_addr);
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parents:
diff changeset
295 if (len) diag_printf(", ");
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parents:
diff changeset
296 }
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parents:
diff changeset
297 diag_printf("\n");
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parents:
diff changeset
298 break;
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parents:
diff changeset
299 case TAG_DOMAIN_NAME:
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diff changeset
300 case TAG_HOST_NAME:
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parents:
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301 for (i = 0; i < *(op+1); i++) {
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diff changeset
302 name[i] = *(op+i+2);
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parents:
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303 }
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304 name[*(op+1)] = '\0';
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diff changeset
305 if (*op == TAG_DOMAIN_NAME) ap = " domain name";
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parents:
diff changeset
306 if (*op == TAG_HOST_NAME) ap = " host name";
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diff changeset
307 diag_printf(" %s: %s\n", ap, name);
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308 break;
110
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diff changeset
309 case TAG_DHCP_MESS_TYPE:
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diff changeset
310 diag_printf(" DHCP message: %d %s\n",
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diff changeset
311 op[2], _dhcpmsgs[op[2]] );
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diff changeset
312 break;
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diff changeset
313 case TAG_DHCP_REQ_IP:
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diff changeset
314 diag_printf(" DHCP requested ip: %d.%d.%d.%d\n",
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diff changeset
315 op[2], op[3], op[4], op[5] );
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diff changeset
316 break;
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diff changeset
317 case TAG_DHCP_LEASE_TIME :
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diff changeset
318 case TAG_DHCP_RENEWAL_TIME :
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diff changeset
319 case TAG_DHCP_REBIND_TIME :
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diff changeset
320 diag_printf(" DHCP time %d: %d\n",
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321 *op, ((((((op[2]<<8)+op[3])<<8)+op[4])<<8)+op[5]) );
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diff changeset
322
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diff changeset
323 break;
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diff changeset
324 case TAG_DHCP_SERVER_ID :
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diff changeset
325 diag_printf(" DHCP server id: %d.%d.%d.%d\n",
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diff changeset
326 op[2], op[3], op[4], op[5] );
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diff changeset
327 break;
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diff changeset
328
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diff changeset
329 case TAG_DHCP_OPTOVER :
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diff changeset
330 case TAG_DHCP_PARM_REQ_LIST:
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diff changeset
331 case TAG_DHCP_TEXT_MESSAGE :
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diff changeset
332 case TAG_DHCP_MAX_MSGSZ :
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diff changeset
333 case TAG_DHCP_CLASSID :
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diff changeset
334 case TAG_DHCP_CLIENTID :
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diff changeset
335 diag_printf(" DHCP option: %x/%d.%d:", *op, *op, *(op+1));
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diff changeset
336 if ( 1 == op[1] )
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diff changeset
337 diag_printf( " %d", op[2] );
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diff changeset
338 else if ( 2 == op[1] )
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diff changeset
339 diag_printf( " %d", (op[2]<<8)+op[3] );
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diff changeset
340 else if ( 4 == op[1] )
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341 diag_printf( " %d", ((((((op[2]<<8)+op[3])<<8)+op[4])<<8)+op[5]) );
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diff changeset
342 else
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diff changeset
343 for ( i = 2; i < 2 + op[1]; i++ )
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diff changeset
344 diag_printf(" %d",op[i]);
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diff changeset
345 diag_printf("\n");
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diff changeset
346 break;
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diff changeset
347
97
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348 default:
110
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diff changeset
349 diag_printf("Unknown option: %x/%d.%d:", *op, *op, *(op+1));
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diff changeset
350 for ( i = 2; i < 2 + op[1]; i++ )
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diff changeset
351 diag_printf(" %d",op[i]);
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diff changeset
352 diag_printf("\n");
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diff changeset
353 break;
97
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parents:
diff changeset
354 }
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355 op += *(op+1)+2;
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diff changeset
356 }
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parents:
diff changeset
357 }
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parents:
diff changeset
358 }
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diff changeset
359
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360 cyg_bool_t
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361 get_bootp_option(struct bootp *bp, unsigned char tag, void *opt)
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362 {
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diff changeset
363 unsigned char *val = (unsigned char *)opt;
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diff changeset
364 int i;
110
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diff changeset
365 cyg_uint8 optover;
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diff changeset
366
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diff changeset
367 #define SCANTAG( ptr ) CYG_MACRO_START \
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diff changeset
368 unsigned char *op = (ptr); \
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diff changeset
369 while (*op != TAG_END) { \
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diff changeset
370 if (*op == tag) { \
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diff changeset
371 for (i = 0; i < *(op+1); i++) { \
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diff changeset
372 *val++ = *(op+i+2); \
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diff changeset
373 } \
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diff changeset
374 return true; \
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diff changeset
375 } \
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diff changeset
376 op += *(op+1)+2; \
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diff changeset
377 } \
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diff changeset
378 CYG_MACRO_END
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diff changeset
379
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diff changeset
380 SCANTAG( &bp->bp_vend[4] );
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diff changeset
381
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diff changeset
382 if ( TAG_DHCP_OPTOVER == tag ) // prevent recursion > once
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diff changeset
383 return false;
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diff changeset
384 // else, look for that tag to see if there's more...
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diff changeset
385 optover = 0;
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diff changeset
386 if ( ! get_bootp_option( bp, TAG_DHCP_OPTOVER, &optover ) )
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diff changeset
387 return false;
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diff changeset
388
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diff changeset
389 if ( 1 & optover ) // then the file field also holds options
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diff changeset
390 SCANTAG( &bp->bp_file[0] );
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diff changeset
391
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diff changeset
392 if ( 2 & optover ) // then the sname field also holds options
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diff changeset
393 SCANTAG( &bp->bp_sname[0] );
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diff changeset
394
97
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parents:
diff changeset
395 return false;
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parents:
diff changeset
396 }
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parents:
diff changeset
397
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diff changeset
398 // [Re]initialize the network interface with the info passed from BOOTP
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diff changeset
399 cyg_bool_t
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parents:
diff changeset
400 init_net(const char *intf, struct bootp *bp)
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parents:
diff changeset
401 {
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diff changeset
402 struct sockaddr_in *addrp;
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parents:
diff changeset
403 struct ifreq ifr;
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parents:
diff changeset
404 int s;
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parents:
diff changeset
405 int one = 1;
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parents:
diff changeset
406 struct ecos_rtentry route;
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parents:
diff changeset
407 struct in_addr netmask, gateway;
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parents:
diff changeset
408
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diff changeset
409 s = socket(AF_INET, SOCK_DGRAM, 0);
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parents:
diff changeset
410 if (s < 0) {
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parents:
diff changeset
411 perror("socket");
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diff changeset
412 return false;
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parents:
diff changeset
413 }
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parents:
diff changeset
414
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parents:
diff changeset
415 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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parents:
diff changeset
416 perror("setsockopt");
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417 return false;
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parents:
diff changeset
418 }
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parents:
diff changeset
419
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420 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
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parents:
diff changeset
421 memset(addrp, 0, sizeof(*addrp));
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diff changeset
422 addrp->sin_family = AF_INET;
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diff changeset
423 addrp->sin_len = sizeof(*addrp);
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diff changeset
424 addrp->sin_port = 0;
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425 addrp->sin_addr = bp->bp_yiaddr; // The address BOOTP gave us
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parents:
diff changeset
426
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diff changeset
427 strcpy(ifr.ifr_name, intf);
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diff changeset
428 if (ioctl(s, SIOCSIFADDR, &ifr)) {
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diff changeset
429 perror("SIOCIFADDR");
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430 return false;
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431 }
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432
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433 if (get_bootp_option(bp, TAG_SUBNET_MASK, &addrp->sin_addr)) {
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434 netmask = addrp->sin_addr;
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435 if (ioctl(s, SIOCSIFNETMASK, &ifr)) {
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436 perror("SIOCSIFNETMASK");
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437 return false;
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438 }
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439 }
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440
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441 if (get_bootp_option(bp, TAG_IP_BROADCAST, &addrp->sin_addr)) {
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442 if (ioctl(s, SIOCSIFBRDADDR, &ifr)) {
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443 perror("SIOCSIFBRDADDR");
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444 return false;
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445 }
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446
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447 }
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448
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449 ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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450 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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451 perror("SIOCSIFFLAGS");
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452 return false;
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453 }
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454
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455 // Set up routing
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456 if (get_bootp_option(bp, TAG_GATEWAY, &gateway)) {
112
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457 // ...and it's a nonzero address...
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458 if ( 0 != gateway.s_addr ) {
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459 memset(&route, 0, sizeof(route));
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460 addrp->sin_family = AF_INET;
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461 addrp->sin_port = 0;
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462 addrp->sin_addr.s_addr = 0; // Use 0,0,GATEWAY for the default route
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463 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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464 addrp->sin_addr.s_addr = 0;
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465 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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466 addrp->sin_addr = gateway;
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467 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
97
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468
112
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469 route.rt_dev = ifr.ifr_name;
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470 route.rt_flags = RTF_UP|RTF_GATEWAY;
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471 route.rt_metric = 0;
97
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472
112
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473 if (ioctl(s, SIOCADDRT, &route)) {
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474 diag_printf("Route - dst: %s",
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475 inet_ntoa(((struct sockaddr_in *)&route.rt_dst)->sin_addr));
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476 diag_printf(", mask: %s",
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477 inet_ntoa(((struct sockaddr_in *)&route.rt_genmask)->sin_addr));
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478 diag_printf(", gateway: %s\n",
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479 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
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480 if (errno != EEXIST) {
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481 perror("SIOCADDRT 3");
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482 return false;
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483 }
97
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484 }
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485 }
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486 }
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487 close(s);
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488 return true;
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489 }