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annotate packages/redboot/current/src/net/bootp.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents
children 25e238959bae
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115
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1 //==========================================================================
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2 //
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3 // net/bootp.c
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4 //
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5 // Stand-alone minimal BOOTP support for RedBoot
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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 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-07-14
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37 // Purpose:
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38 // Description:
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39 //
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40 // This code is part of RedBoot (tm).
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //==========================================================================
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45
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46 #include <net/net.h>
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47 #include <net/bootp.h>
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48
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49 extern int net_debug;
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50
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51 #define SHOULD_BE_RANDOM 0x12345555
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52
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53 /* How many milliseconds to wait before retrying the request */
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54 #define RETRY_TIME 2000
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55
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56 static bootp_header_t *bp_info;
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57
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58 static void
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59 bootp_handler(udp_socket_t *skt, char *buf, int len,
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60 ip_route_t *src_route, word src_port)
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61 {
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62 bootp_header_t *b;
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63
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64 b = (bootp_header_t *)buf;
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65 if (bp_info) {
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66 memcpy(bp_info, b, len);
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67 }
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68
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69 if (b->bp_op == BOOTREPLY &&
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70 !memcmp(b->bp_chaddr, __local_enet_addr, 6)) {
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71 memcpy(__local_ip_addr, &b->bp_yiaddr, 4);
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72 }
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73 }
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74
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75
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76 /*
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77 * Find our IP address and copy to __local_ip_addr.
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78 * Return zero if successful, -1 if not.
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79 */
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80 int
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81 __bootp_find_local_ip(bootp_header_t *info)
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82 {
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83 udp_socket_t udp_skt;
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84 bootp_header_t b;
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85 ip_route_t r;
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86 int retry;
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87 unsigned long start;
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88
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89 bp_info = info;
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90
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91 memset(&b, 0, sizeof(b));
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92
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93 b.bp_op = BOOTREQUEST;
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94 b.bp_htype = HTYPE_ETHERNET;
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95 b.bp_hlen = 6;
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96 b.bp_xid = SHOULD_BE_RANDOM;
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97
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98 __local_ip_addr[0] = 0;
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99 __local_ip_addr[1] = 0;
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100 __local_ip_addr[2] = 0;
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101 __local_ip_addr[3] = 0;
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102
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103 memcpy(b.bp_chaddr, __local_enet_addr, 6);
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104
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105 /* fill out route for a broadcast */
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106 r.ip_addr[0] = 255;
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107 r.ip_addr[1] = 255;
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108 r.ip_addr[2] = 255;
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109 r.ip_addr[3] = 255;
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110 r.enet_addr[0] = 255;
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111 r.enet_addr[1] = 255;
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112 r.enet_addr[2] = 255;
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113 r.enet_addr[3] = 255;
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114 r.enet_addr[4] = 255;
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115 r.enet_addr[5] = 255;
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116
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117 /* setup a socket listener for bootp replies */
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118 __udp_install_listener(&udp_skt, IPPORT_BOOTPC, bootp_handler);
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119
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120 retry = 3;
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121 while (retry-- > 0) {
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122 start = MS_TICKS();
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123
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124 __udp_send((char *)&b, sizeof(b), &r, IPPORT_BOOTPS, IPPORT_BOOTPC);
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125
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126 do {
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127 __enet_poll();
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128 if (__local_ip_addr[0] || __local_ip_addr[1] ||
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129 __local_ip_addr[2] || __local_ip_addr[3]) {
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130 /* success */
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131 __udp_remove_listener(IPPORT_BOOTPC);
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132 return 0;
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133 }
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134 } while ((MS_TICKS() - start) < RETRY_TIME);
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135 }
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136
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137 /* timed out */
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138 __udp_remove_listener(IPPORT_BOOTPC);
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139 net_debug = 0;
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140 return -1;
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141 }
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jlarmour
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