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annotate src/lookup.c @ 0:08114f7dcc23 0.2.21

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this is masqmail-0.2.21 from oliver kurth
author meillo@marmaro.de
date Fri, 26 Sep 2008 17:05:23 +0200
parents
children 26e34ae9a3e3
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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1 /* MasqMail Copyright (C) Oliver Kurth,
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2 *
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3 * This program is free software; you can redistribute it and/or modify
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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4 * it under the terms of the GNU General Public License as published by
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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5 * the Free Software Foundation; either version 2 of the License, or
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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6 * (at your option) any later version.
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7 *
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8 * This program is distributed in the hope that it will be useful,
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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11 * GNU General Public License for more details.
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12 *
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13 * You should have received a copy of the GNU General Public License
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14 * along with this program; if not, write to the Free Software
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15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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16 */
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17
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18 #include <sys/types.h>
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19 #include <netinet/in.h>
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20 #include <arpa/nameser.h>
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21 #include <resolv.h>
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22
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23 #include "masqmail.h"
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24
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25 #ifdef RESOLV_TEST
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26
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27 #undef DEBUG
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28 #define DEBUG(x) if(x > 0)
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29
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30 #define debugf g_print
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31 #endif
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32
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33 #ifdef ENABLE_RESOLVER
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34
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35 static union {
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36 HEADER hdr;
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37 unsigned char buf[PACKETSZ];
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38 } response;
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39 static unsigned char *resp_end;
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40 static unsigned char *resp_pos;
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41
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42 static int num_answers;
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43 static char name[MAX_DNSNAME];
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44
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45 unsigned short rr_type;
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46 unsigned short rr_dlen;
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47
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48 static
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49 unsigned short getshort(unsigned char *c)
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50 {
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51 unsigned short u;
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52 u = c[0];
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53 return (u << 8) + c[1];
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54 }
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55
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56 static
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57 int dns_resolve(char *domain, int type, gboolean do_search)
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58 {
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59 int n;
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60 int i;
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61
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62 int resp_len;
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63 /*errno = 0;*/
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64
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65 /*
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66 if (!stralloc_copy(&glue,domain)) return DNS_MEM;
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67 if (!stralloc_0(&glue)) return DNS_MEM;
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68 */
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69
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70 // resp_len = res_query(domain, C_IN, type, response.buf, sizeof(response));
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71 DEBUG(5) debugf("DNS: before res_search()\n");
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72 if(do_search)
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73 resp_len = res_search(domain, C_IN, type, response.buf, sizeof(response));
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74 else
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75 resp_len = res_query(domain, C_IN, type, response.buf, sizeof(response));
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76 DEBUG(5) debugf("DBG: after res_search()\n");
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77
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78 if (resp_len <= 0){
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79 /*
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80 if (errno == ECONNREFUSED) return DNS_SOFT;
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81 if (h_errno == TRY_AGAIN) return DNS_SOFT;
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82 return DNS_HARD;
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83 */
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84 return -1;
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85 }
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86 if (resp_len >= sizeof(response))
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87 resp_len = sizeof(response);
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88
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89 resp_end = response.buf + resp_len;
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90 resp_pos = response.buf + sizeof(HEADER);
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91 n = ntohs(response.hdr.qdcount);
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92
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93 while (n-- > 0){
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94 i = dn_expand(response.buf, resp_end, resp_pos, name, MAX_DNSNAME);
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95 if (i < 0)
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96 return -1;
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97 DEBUG(5) debugf("DBG: resolve name = %s\n", name);
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98 resp_pos += i;
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99 i = resp_end - resp_pos;
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100 if (i < QFIXEDSZ)
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101 return -1;
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102 resp_pos += QFIXEDSZ;
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103 }
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104 num_answers = ntohs(response.hdr.ancount);
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105
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106 return 0;
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107 }
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108
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109 static int dns_next()
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110 {
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111 int i;
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112
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113 if (num_answers <= 0) return 2;
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114 num_answers--;
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115
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116 if (resp_pos == resp_end)
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117 return -1 /* soft */;
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118
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119 i = dn_expand(response.buf, resp_end, resp_pos, name, 256);
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120 if (i < 0)
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121 return -1; /* soft */
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122 resp_pos += i;
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123
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124 i = resp_end - resp_pos;
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125 if (i < 4 + 3 * 2)
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126 return -1; /* soft */
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127
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128 rr_type = getshort(resp_pos);
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129 rr_dlen = getshort(resp_pos + 8);
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130 resp_pos += 10;
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131
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132 return 0;
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133 }
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134
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135 static
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136 int dns_getip(guint32 *ip)
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137 {
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138 int ret;
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139
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140 if((ret = dns_next())) return ret;
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141
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142 if (rr_type == T_A){
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143 if (rr_dlen < 4)
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144 return -1; /* soft */
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145 *ip = *(guint32 *)(resp_pos);
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146 DEBUG(5) debugf("DNS: dns_getip(): ip = %s\n", inet_ntoa(*(struct in_addr*)ip));
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147 resp_pos += rr_dlen;
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148
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149 return 1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
150 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
151 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
152 return 0;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
153 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
154
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
155 static
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
156 int dns_getmx(int *pref)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
157 {
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
158 int ret;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
159
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
160 if((ret = dns_next())) return ret;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
161
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
162 if (rr_type == T_MX){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
163 if (rr_dlen < 3)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
164 return -1; /* soft */
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
165
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
166 *pref = (resp_pos[0] << 8) + resp_pos[1];
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
167 if (dn_expand(response.buf, resp_end, resp_pos + 2, name, MAX_DNSNAME) < 0)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
168 return -1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
169
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
170 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
171
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
172 return 1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
173 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
174 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
175 return 0;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
176 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
177
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
178 /*
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
179 static
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
180 int dns_getname(int type)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
181 {
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
182 int ret;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
183
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
184 if((ret = dns_next())) return ret;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
185
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
186 if (rr_type == type){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
187 if (dn_expand(response.buf, resp_end, resp_pos, name, MAX_DNSNAME) < 0)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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diff changeset
188 return -1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
189
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
190 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
191
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
192 return 1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
193 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
194 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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diff changeset
195 return 0;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
196 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
197 */
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
198
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
199 static
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
200 int dns_look_ip(gchar *domain, guint32 *ip)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
201 {
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
202 gchar *n = domain;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
203
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
204 while(TRUE){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
205 if(dns_resolve(n, T_A, FALSE) == 0){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
206 dns_next();
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
207 if(rr_type == T_A){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
208 if (rr_dlen < 4)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
209 return -1; /* soft */
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
210 *ip = *(guint32 *)(resp_pos);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
211
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
212 DEBUG(5) debugf("DNS: dns_look_ip(): ip = %s\n",
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
213 inet_ntoa(*(struct in_addr*)ip));
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
214
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
215 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
216 return 0;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
217 }else if(rr_type == T_CNAME){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
218 if (dn_expand(response.buf, resp_end, resp_pos, name, MAX_DNSNAME) < 0)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
219 return -1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
220
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
221 DEBUG(5) debugf("DNS: (CNAME) dns_look_ip(): name = %s\n", name);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
222
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
223 resp_pos += rr_dlen;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
224 n = name;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
225 }else
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
226 return -1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
227 }else
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
228 return -1;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
229 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
230 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
231
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
232 GList *resolve_dns_a(GList *list, gchar *domain)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
233 {
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
234 int ret;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
235
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
236 DEBUG(5) debugf("DNS: resolve_dns_a entered\n");
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
237
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
238 if(dns_resolve(domain, T_A, TRUE) == 0){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
239 mxip_addr mxip;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
240 while((ret = dns_getip(&(mxip.ip))) != 2){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
241 if(ret == 1){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
242 mxip.name = g_strdup(name);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
243 mxip.pref = 0;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
244 list = g_list_append(list, g_memdup(&mxip, sizeof(mxip)));
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
245 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
246 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
247 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
248 return list;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
249 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
250
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
251 static
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
252 gint _mx_sort_func(gconstpointer aa, gconstpointer bb)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
253 {
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
254 const mxip_addr *a = (mxip_addr *)aa;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
255 const mxip_addr *b = (mxip_addr *)bb;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
256
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
257 if(a->pref == b->pref)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
258 return a->ip - b->ip;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
259 else
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
260 return a->pref - b->pref;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
261 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
262
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
263 GList *resolve_dns_mx(GList *list, gchar *domain)
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
264 {
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
265 GList *node;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
266 int ret;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
267 int cnt = 0;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
268
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
269 DEBUG(5) debugf("DNS: resolve_dns_mx entered\n");
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
270
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
271 if(dns_resolve(domain, T_MX, TRUE) == 0){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
272 GList *node_next;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
273 mxip_addr mxip;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
274 while((ret = dns_getmx(&(mxip.pref))) != 2){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
275 if(ret == 1){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
276 mxip.name = g_strdup(name);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
277 mxip.ip = rand();
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
278 list = g_list_append(list, g_memdup(&mxip, sizeof(mxip)));
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
279 cnt++;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
280 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
281 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
282
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
283 DEBUG(5) debugf("DNS: found %d mx records\n", cnt);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
284
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
285 /* to randomize sequences with equal pref values,
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
286 we temporarily 'misused' the ip field and
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
287 put a random number in it as a secondary sort key.
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
288 */
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
289 list = g_list_sort(list, _mx_sort_func);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
290
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
291 /* CNAME resolving has to be added as well. */
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
292
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
293 for(node = g_list_first(list);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
294 node != NULL;
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
295 node = node_next){
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
296
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
297 mxip_addr *p_mxip = (mxip_addr *)(node->data);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
298 node_next = g_list_next(node);
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
299
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
300 if(dns_look_ip(p_mxip->name, &(p_mxip->ip)) != 0){
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301 DEBUG(1) debugf("DNS: could not resolve target of mx %s\n", p_mxip->name);
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302 list = g_list_remove_link(list, node);
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303 g_free(node->data);
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304 g_list_free_1(node);
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305 }
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306 }
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307 }
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308 return list;
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309 }
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310
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311 #endif
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312
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313 /* now something completely different... */
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314
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315 GList *resolve_byname(GList *list, gchar *domain)
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316 {
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317 struct hostent *hent;
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318
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319 DEBUG(5) debugf("DNS: resolve_byname entered\n");
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320
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321 if((hent = gethostbyname(domain))){
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322 char *haddr;
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323 int i = 0;
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324 while((haddr = hent->h_addr_list[i++])){
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325 mxip_addr mxip;
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326 mxip.ip = *(guint32 *)(haddr);
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327 mxip.pref = 0;
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328 mxip.name = g_strdup(hent->h_name);
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329 list = g_list_append(list, g_memdup(&mxip, sizeof(mxip)));
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330 }
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331 }
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332 return list;
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333 }
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334
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335 #ifdef RESOLV_TEST
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336 int main(int argc, char *argv[])
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337 {
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338 GList *addr_list = NULL, *node;
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339
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340 g_print("starting res_init()\n");
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341
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342 g_print("retrans = %d, retry = %d\n", _res.retrans, _res.retry);
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343
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344 if(res_init() == 0){
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345
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346 addr_list = resolve_dns_a(NULL, argv[1]);
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347 g_print("A:\n");
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348
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349 foreach(addr_list, node){
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350 mxip_addr *p_mxip = (mxip_addr *)(node->data);
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351
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352 printf("name = %s\n IP = %s\n",
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353 p_mxip->name,
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354 inet_ntoa(*(struct in_addr *)&(p_mxip->ip)));
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355 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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356 addr_list = resolve_dns_mx(NULL, argv[1]);
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357 g_print("MX:\n");
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358
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359 foreach(addr_list, node){
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360 mxip_addr *p_mxip = (mxip_addr *)(node->data);
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361
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362 printf("name = %s\n IP = %s pref = %d\n",
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363 p_mxip->name,
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364 inet_ntoa(*(struct in_addr *)&(p_mxip->ip)),
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365 p_mxip->pref);
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366 }
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367 {
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368 guint32 ip;
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369 dns_look_ip(argv[1], &ip);
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370 printf("dns_look_ip: %s\n", inet_ntoa(*((struct in_addr *)(&ip))));
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371 }
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372 }else
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373 printf("res_init() failed.\n");
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374
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375 }
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376 #endif