Mercurial > flash_v2

annotate packages/net/tcpip/current/src/lib/bootp_support.c @ 97:ced4577552cd ecos-sw-2000-06-06

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Merge from eCos master repository on 2000-06-06-08:44:00-BST
author jlarmour
date Tue, 06 Jun 2000 08:39:36 +0000
parents
children 84e4bde58b26
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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
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56
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57 #include <network.h>
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58
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59 // This function sets up the interface it the simplest configuration.
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60 // Just enough to broadcast a BOOTP request and get a response.
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61 // It returns 'true' if a response was obtained.
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62 cyg_bool_t
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63 do_bootp(const char *intf, struct bootp *recv)
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64 {
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65 struct sockaddr_in *addrp;
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66 struct ifreq ifr;
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67 struct sockaddr_in cli_addr, serv_addr, bootp_server_addr;
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68 struct ecos_rtentry route;
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69 int s, addrlen;
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70 int one = 1;
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71 struct bootp bootp_xmit;
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72 unsigned char mincookie[] = {99,130,83,99,255} ;
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73 struct timeval tv;
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74
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75 // Ensure clean slate
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76 route_reinit(); // Force any existing routes to be forgotten
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77
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78 s = socket(AF_INET, SOCK_DGRAM, 0);
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79 if (s < 0) {
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80 perror("socket");
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81 return false;
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82 }
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83
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84 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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85 perror("setsockopt");
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86 return false;
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87 }
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88
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89 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
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90 memset(addrp, 0, sizeof(*addrp));
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91 addrp->sin_family = AF_INET;
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92 addrp->sin_len = sizeof(*addrp);
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93 addrp->sin_port = 0;
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94 addrp->sin_addr.s_addr = INADDR_ANY;
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95
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96 strcpy(ifr.ifr_name, intf);
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97 if (ioctl(s, SIOCSIFADDR, &ifr)) {
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98 perror("SIOCSIFADDR");
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99 return false;
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100 }
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101
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102 if (ioctl(s, SIOCSIFNETMASK, &ifr)) {
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103 perror("SIOCSIFNETMASK");
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104 return false;
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105 }
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106
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107 /* the broadcast address is 255.255.255.255 */
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108 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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109 if (ioctl(s, SIOCSIFBRDADDR, &ifr)) {
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110 perror("SIOCSIFBRDADDR");
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111 return false;
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112 }
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113
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114 ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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115 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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116 perror("SIOCSIFFLAGS");
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117 return false;
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118 }
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119
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120 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
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121 perror("SIOCGIFHWADDR");
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122 return false;
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123 }
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124
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125 // Set up routing
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126 /* the broadcast address is 255.255.255.255 */
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127 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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128 memset(&route, 0, sizeof(route));
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129 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
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130
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131 addrp->sin_family = AF_INET;
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132 addrp->sin_port = 0;
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133 addrp->sin_addr.s_addr = INADDR_ANY;
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134 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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135 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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136
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137 route.rt_dev = ifr.ifr_name;
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138 route.rt_flags = RTF_UP|RTF_GATEWAY;
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139 route.rt_metric = 0;
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140
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141 if (ioctl(s, SIOCADDRT, &route)) {
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142 if (errno != EEXIST) {
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143 perror("SIOCADDRT 3");
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144 return false;
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145 }
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146 }
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147
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148 memset((char *) &cli_addr, 0, sizeof(cli_addr));
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149 cli_addr.sin_family = AF_INET;
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150 cli_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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151 cli_addr.sin_port = htons(IPPORT_BOOTPC);
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diff changeset
152
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153 if(bind(s, (struct sockaddr *) &cli_addr, sizeof(cli_addr)) < 0) {
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diff changeset
154 perror("bind error");
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155 return false;
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156 }
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157 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
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diff changeset
158 perror("setsockopt SO_REUSEADDR");
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diff changeset
159 return false;
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160 }
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diff changeset
161 if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one))) {
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diff changeset
162 perror("setsockopt SO_REUSEPORT");
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163 return false;
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164 }
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165
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166 memset((char *) &serv_addr, 0, sizeof(serv_addr));
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167 serv_addr.sin_family = AF_INET;
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168 serv_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
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169 serv_addr.sin_port = htons(IPPORT_BOOTPS);
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170
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171 // Fill in the BOOTP request
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172 bzero(&bootp_xmit, sizeof(bootp_xmit));
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173 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
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174 perror("SIOCGIFHWADDR");
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175 return false;
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176 }
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177 bootp_xmit.bp_htype = ifr.ifr_hwaddr.sa_family;
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178 bootp_xmit.bp_hlen = IFHWADDRLEN;
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179 bcopy(ifr.ifr_hwaddr.sa_data, &bootp_xmit.bp_chaddr, bootp_xmit.bp_hlen);
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180
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181 bootp_xmit.bp_secs = 0;
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182 bcopy(mincookie, bootp_xmit.bp_vend, sizeof(mincookie));
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183
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184 bootp_xmit.bp_op = BOOTREQUEST;
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diff changeset
185
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186 if(sendto(s, &bootp_xmit, sizeof(struct bootp), 0,
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187 (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
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188 perror("sendto error");
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189 return false;
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190 }
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191
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192 tv.tv_sec = 5;
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193 tv.tv_usec = 0;
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194 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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195
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196 addrlen = sizeof(bootp_server_addr);
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197 if (recvfrom(s, recv, sizeof(struct bootp), 0,
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diff changeset
198 (struct sockaddr *)&bootp_server_addr, &addrlen) < 0) {
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diff changeset
199 perror("recvfrom error");
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200 return false;
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201 }
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diff changeset
202
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diff changeset
203
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204 memset(addrp, 0, sizeof(*addrp));
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205 addrp->sin_family = AF_INET;
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206 addrp->sin_len = sizeof(*addrp);
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207 addrp->sin_port = 0;
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208 addrp->sin_addr.s_addr = INADDR_ANY;
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diff changeset
209
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210 strcpy(ifr.ifr_name, intf);
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diff changeset
211 if (ioctl(s, SIOCDIFADDR, &ifr)) {
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212 perror("SIOCDIFADDR");
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213 }
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diff changeset
214
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215 // Shut down interface so it can be reinitialized
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216 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
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217 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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diff changeset
218 perror("SIOCSIFFLAGS");
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219 return false;
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220 }
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diff changeset
221
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diff changeset
222 // All done with socket
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diff changeset
223 close(s);
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224 return true;
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225 }
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diff changeset
226
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227 static char *_bootp_op[] = {"", "REQUEST", "REPLY"};
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228 static char *_bootp_hw_type[] = {"", "Ethernet", "Exp Ethernet", "AX25",
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229 "Pronet", "Chaos", "IEEE802", "Arcnet"};
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230
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diff changeset
231 void
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diff changeset
232 show_bootp(const char *intf, struct bootp *bp)
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diff changeset
233 {
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diff changeset
234 int i, len;
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diff changeset
235 unsigned char *op, *ap = 0;
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diff changeset
236 unsigned char name[128];
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diff changeset
237 struct in_addr addr[32];
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diff changeset
238 diag_printf("BOOTP[%s] op: %s\n", intf, _bootp_op[bp->bp_op]);
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diff changeset
239 diag_printf(" hw_type: %s\n", _bootp_hw_type[bp->bp_htype]);
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diff changeset
240 diag_printf(" hw_addr: ");
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diff changeset
241 for (i = 0; i < bp->bp_hlen; i++) {
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242 diag_printf("%02x", bp->bp_chaddr[i]);
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diff changeset
243 if (i != (bp->bp_hlen-1)) diag_printf(":");
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diff changeset
244 }
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diff changeset
245 diag_printf("\n");
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diff changeset
246 diag_printf(" client IP: %s\n", inet_ntoa(bp->bp_ciaddr));
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diff changeset
247 diag_printf(" my IP: %s\n", inet_ntoa(bp->bp_yiaddr));
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diff changeset
248 diag_printf(" server IP: %s\n", inet_ntoa(bp->bp_siaddr));
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diff changeset
249 diag_printf(" gateway IP: %s\n", inet_ntoa(bp->bp_giaddr));
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diff changeset
250 if (bp->bp_sname[0]) {
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diff changeset
251 diag_printf(" server: %s\n", bp->bp_sname);
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diff changeset
252 }
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diff changeset
253 if (bp->bp_file[0]) {
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diff changeset
254 diag_printf(" file: %s\n", bp->bp_file);
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diff changeset
255 }
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diff changeset
256 if (bp->bp_vend[0]) {
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diff changeset
257 diag_printf(" options:\n");
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diff changeset
258 op = &bp->bp_vend[4];
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diff changeset
259 while (*op != TAG_END) {
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diff changeset
260 switch (*op) {
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diff changeset
261 case TAG_SUBNET_MASK:
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diff changeset
262 case TAG_GATEWAY:
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diff changeset
263 case TAG_IP_BROADCAST:
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diff changeset
264 case TAG_DOMAIN_SERVER:
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265 ap = (unsigned char *)&addr[0];
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266 len = *(op+1);
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267 for (i = 0; i < len; i++) {
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268 *ap++ = *(op+i+2);
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diff changeset
269 }
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270 if (*op == TAG_SUBNET_MASK) ap = " subnet mask";
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271 if (*op == TAG_GATEWAY) ap = " gateway";
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diff changeset
272 if (*op == TAG_IP_BROADCAST) ap = " IP broadcast";
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diff changeset
273 if (*op == TAG_DOMAIN_SERVER) ap = "domain server";
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diff changeset
274 diag_printf(" %s: ", ap);
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275 ap = (unsigned char *)&addr[0];
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diff changeset
276 while (len > 0) {
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diff changeset
277 diag_printf("%s", inet_ntoa(*(struct in_addr *)ap));
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diff changeset
278 len -= sizeof(struct in_addr);
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diff changeset
279 ap += sizeof(struct in_addr);
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diff changeset
280 if (len) diag_printf(", ");
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diff changeset
281 }
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diff changeset
282 diag_printf("\n");
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diff changeset
283 break;
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diff changeset
284 case TAG_DOMAIN_NAME:
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diff changeset
285 case TAG_HOST_NAME:
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diff changeset
286 for (i = 0; i < *(op+1); i++) {
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287 name[i] = *(op+i+2);
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diff changeset
288 }
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289 name[*(op+1)] = '\0';
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290 if (*op == TAG_DOMAIN_NAME) ap = " domain name";
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diff changeset
291 if (*op == TAG_HOST_NAME) ap = " host name";
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diff changeset
292 diag_printf(" %s: %s\n", ap, name);
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293 break;
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294 default:
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295 diag_printf("Unknown option: %x.%d\n", *op, *(op+1));
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296 }
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297 op += *(op+1)+2;
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298 }
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299 }
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300 }
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301
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302 cyg_bool_t
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303 get_bootp_option(struct bootp *bp, unsigned char tag, void *opt)
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304 {
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305 unsigned char *op;
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306 unsigned char *val = (unsigned char *)opt;
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307 int i;
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308 op = &bp->bp_vend[4];
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309 while (*op != TAG_END) {
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310 if (*op == tag) {
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311 for (i = 0; i < *(op+1); i++) {
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312 *val++ = *(op+i+2);
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313 }
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314 return true;
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315 }
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316 op += *(op+1)+2;
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317 }
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318 return false;
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319 }
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320
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321 // [Re]initialize the network interface with the info passed from BOOTP
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322 cyg_bool_t
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323 init_net(const char *intf, struct bootp *bp)
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324 {
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325 struct sockaddr_in *addrp;
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326 struct ifreq ifr;
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327 int s;
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328 int one = 1;
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329 struct ecos_rtentry route;
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330 struct in_addr netmask, gateway;
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331
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332 s = socket(AF_INET, SOCK_DGRAM, 0);
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333 if (s < 0) {
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334 perror("socket");
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335 return false;
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336 }
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337
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338 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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339 perror("setsockopt");
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340 return false;
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341 }
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342
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343 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
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344 memset(addrp, 0, sizeof(*addrp));
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345 addrp->sin_family = AF_INET;
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346 addrp->sin_len = sizeof(*addrp);
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347 addrp->sin_port = 0;
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348 addrp->sin_addr = bp->bp_yiaddr; // The address BOOTP gave us
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349
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350 strcpy(ifr.ifr_name, intf);
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351 if (ioctl(s, SIOCSIFADDR, &ifr)) {
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352 perror("SIOCIFADDR");
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353 return false;
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354 }
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355
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356 if (get_bootp_option(bp, TAG_SUBNET_MASK, &addrp->sin_addr)) {
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357 netmask = addrp->sin_addr;
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358 if (ioctl(s, SIOCSIFNETMASK, &ifr)) {
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359 perror("SIOCSIFNETMASK");
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360 return false;
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361 }
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362 }
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363
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364 if (get_bootp_option(bp, TAG_IP_BROADCAST, &addrp->sin_addr)) {
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365 if (ioctl(s, SIOCSIFBRDADDR, &ifr)) {
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366 perror("SIOCSIFBRDADDR");
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367 return false;
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368 }
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369
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370 }
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371
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372 ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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373 if (ioctl(s, SIOCSIFFLAGS, &ifr)) {
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374 perror("SIOCSIFFLAGS");
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375 return false;
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376 }
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377
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378 // Set up routing
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379 if (get_bootp_option(bp, TAG_GATEWAY, &gateway)) {
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380 memset(&route, 0, sizeof(route));
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381 addrp->sin_family = AF_INET;
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382 addrp->sin_port = 0;
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383 addrp->sin_addr.s_addr = *(unsigned int *)&bp->bp_yiaddr & *(unsigned int *)&netmask;
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384 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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385 addrp->sin_addr = netmask;
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386 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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387 addrp->sin_addr = gateway;
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388 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
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389
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390 route.rt_dev = ifr.ifr_name;
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391 route.rt_flags = RTF_UP|RTF_GATEWAY;
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392 route.rt_metric = 0;
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393
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394 if (ioctl(s, SIOCADDRT, &route)) {
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395 diag_printf("Route - dst: %s", inet_ntoa(((struct sockaddr_in *)&route.rt_dst)->sin_addr));
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396 diag_printf(", mask: %s", inet_ntoa(((struct sockaddr_in *)&route.rt_genmask)->sin_addr));
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397 diag_printf(", gateway: %s\n", inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
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398 if (errno != EEXIST) {
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399 perror("SIOCADDRT 3");
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400 return false;
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401 }
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402 }
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403 }
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404 close(s);
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405 return true;
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406 }