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annotate src/alias.c @ 241:87df0aa99cc7

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added myself to the copyright notice of route.c see the earlier changes about split_rcpts()
author markus schnalke <meillo@marmaro.de>
date Mon, 25 Oct 2010 15:41:48 -0300
parents 31ee44f45787
children bc9d9cd9ee8e
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1 /* MasqMail
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2 Copyright (C) 2000-2001 Oliver Kurth
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3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 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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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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18 */
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19
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20 #include "masqmail.h"
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21 #include <fnmatch.h>
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22
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23 gboolean
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24 addr_is_local(address * addr)
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25 {
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26 GList *dom_node;
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27 GList *addr_node;
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28 address *a;
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29
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30 if (addr->domain == NULL) {
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31 return TRUE;
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32 }
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33 foreach(conf.local_hosts, dom_node) {
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34 /* Note: FNM_CASEFOLD is a GNU extension */
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35 if (fnmatch(dom_node->data, addr->domain, FNM_CASEFOLD) != 0) {
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36 /* no match, try next */
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37 continue;
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38 }
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39 foreach(conf.not_local_addresses, addr_node) {
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40 a = create_address_qualified(addr_node->data, TRUE, conf.host_name);
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41 DEBUG(6) debugf("not_local_addresses: addr_node->data=%s a->address=%s\n",
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42 addr_node->data, a->address);
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43 if (addr_isequal(a, addr)) {
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44 destroy_address(a);
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45 /* in local_hosts but also in not_local_addresses */
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46 return FALSE;
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47 }
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48 destroy_address(a);
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49 }
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50 /* in local_hosts */
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51 return TRUE;
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52 }
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53 foreach(conf.local_addresses, addr_node) {
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54 a = create_address_qualified(addr_node->data, TRUE, conf.host_name);
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55 DEBUG(6) debugf("local_addresses: addr_node->data=%s a->address=%s\n",
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56 addr_node->data, a->address);
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57 if (addr_isequal(a, addr)) {
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58 destroy_address(a);
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59 /* in local_addresses */
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60 return TRUE;
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61 }
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62 destroy_address(a);
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63 }
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64 return FALSE;
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65 }
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66
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67 static gboolean
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68 addr_isequal_alias(address * addr1, address * addr2)
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69 {
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70 return (conf.alias_local_cmp(addr1->local_part, addr2->local_part) == 0)
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71 && (strcasecmp(addr1->domain, addr2->domain) == 0);
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72 }
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73
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74 static GList*
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75 parse_list(gchar * line)
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76 {
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77 GList *list = NULL;
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78 gchar buf[256];
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79 gchar *p, *q;
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80
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81 p = line;
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82 while (*p != '\0') {
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83 q = buf;
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84 while (isspace(*p))
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85 p++;
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86 if (*p != '"') {
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87 while (*p && (*p != ',') && (q < buf + 255))
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88 *(q++) = *(p++);
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89 *q = '\0';
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90 } else {
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91 gboolean escape = FALSE;
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92 p++;
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93 while (*p && (*p != '"' || escape) && (q < buf + 255)) {
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94 if ((*p == '\\') && !escape)
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95 escape = TRUE;
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96 else {
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97 escape = FALSE;
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98 *(q++) = *p;
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99 }
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100 p++;
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101 }
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102 *q = '\0';
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103 while (*p && (*p != ','))
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104 p++;
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105 }
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106 list = g_list_append(list, g_strdup(g_strchomp(buf)));
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107 if (*p)
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108 p++;
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109 }
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110 return list;
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111 }
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112
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113 /*
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114 addr is assumed to be local and no pipe address nor not-to-expand
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115 */
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116 static GList*
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117 expand_one(GList* alias_table, address* addr)
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118 {
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119 GList *val_list;
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120 GList *val_node;
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121 GList *alias_list = NULL;
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122 GList *alias_node;
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123 gchar *val;
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124 address* alias_addr;
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125
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126 /* expand the local alias */
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127 DEBUG(6) debugf("alias: '%s' is local and will get expanded\n", addr->local_part);
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128
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129 if (strcasecmp(addr->local_part, "postmaster") == 0) {
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130 /* postmaster must always be matched caseless
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131 see RFC 822 and RFC 5321 */
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132 val = (gchar *) table_find_func(alias_table, addr->local_part, strcasecmp);
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133 } else {
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134 val = (gchar *) table_find_func(alias_table, addr->local_part, conf.alias_local_cmp);
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135 }
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136 if (!val) {
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137 DEBUG(5) debugf("alias: '%s' is fully expanded, hence completed\n",
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138 addr->local_part);
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139 return g_list_append(NULL, addr);
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140 }
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141
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142 DEBUG(5) debugf("alias: '%s' -> '%s'\n", addr->local_part, val);
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143 val_list = parse_list(val);
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144 alias_list = NULL;
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145
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146 foreach(val_list, val_node) {
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147 gchar *val = (gchar *) (val_node->data);
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148 address *alias_addr;
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149 address *addr_parent = NULL;
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150
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151 DEBUG(6) debugf("alias: processing '%s'\n", val);
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152
239
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153 if (val[0] == '\\') {
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154 DEBUG(5) debugf("alias: '%s' is marked as final, hence completed\n", val);
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155 alias_addr = create_address_qualified(val+1, TRUE, conf.host_name);
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156 g_free(val);
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157 DEBUG(6) debugf("alias: address generated: '%s'\n",
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158 alias_addr->local_part);
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159 alias_list = g_list_append(alias_list, alias_addr);
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160 continue;
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161 }
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162
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163 if (val[0] == '|') {
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164 DEBUG(5) debugf("alias: '%s' is a pipe address\n", val);
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165 alias_addr = create_address_pipe(val+1);
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166 g_free(val);
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167 DEBUG(6) debugf("alias: pipe generated: %s\n",
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168 alias_addr->local_part);
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169 alias_list = g_list_append(alias_list, alias_addr);
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170 continue;
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171 }
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172
239
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173 alias_addr = create_address_qualified(val, TRUE, conf.host_name);
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174 g_free(val);
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175
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176 if (!addr_is_local(alias_addr)) {
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177 DEBUG(5) debugf("alias: '%s@%s' is non-local, hence completed\n",
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178 alias_addr->local_part, alias_addr->domain);
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179 alias_list = g_list_append(alias_list, alias_addr);
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180 continue;
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181 }
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182
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183 /* addr is local, so let's go into recursion and expand again,
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184 but first ... search in parents for loops: */
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185 for (addr_parent=addr; addr_parent; addr_parent=addr_parent->parent) {
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186 if (addr_isequal_alias(alias_addr, addr_parent)) {
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187 break;
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188 }
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189 }
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190 if (addr_parent) {
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191 /* loop detected, ignore this path */
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192 logwrite(LOG_ALERT,
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193 "alias: detected loop (%s -> %s), hence ignoring\n",
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194 addr_parent->local_part, addr->local_part);
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195 continue;
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196 }
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197 alias_addr->parent = addr;
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198
239
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199 /* recurse */
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200 DEBUG(6) debugf("alias: >>\n");
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201 alias_node = expand_one(alias_table, alias_addr);
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202 DEBUG(6) debugf("alias: <<\n");
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203 if (alias_node) {
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204 alias_list = g_list_concat(alias_list, alias_node);
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205 }
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206 }
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207 g_list_free(val_list);
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208 addr->children = g_list_copy(alias_list);
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209
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210 return alias_list;
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211 }
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212
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213 GList*
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214 alias_expand(GList* alias_table, GList* rcpt_list, GList* non_rcpt_list)
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215 {
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216 GList *rcpt_node = NULL;
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217 GList *alias_list = NULL;
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218 GList *done_list = NULL;
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219 GList *rcpt_node_next = NULL;
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220 address *addr = NULL;
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221
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222 for (rcpt_node=g_list_copy(rcpt_list);
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223 rcpt_node;
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224 rcpt_node=g_list_next(rcpt_node)) {
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225
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226 addr = (address *) (rcpt_node->data);
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227 if (addr_is_local(addr)) {
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228 DEBUG(5) debugf("alias: (orig rcpt addr) expand local '%s'\n",
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229 addr->local_part);
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230 alias_list = expand_one(alias_table, addr);
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231 if (alias_list) {
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232 done_list = g_list_concat(done_list, alias_list);
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233 }
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234 } else {
239
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235 DEBUG(5) debugf("alias: (orig rcpt addr) don't expand non-local '%s@%s'\n",
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diff changeset
236 addr->local_part, addr->domain);
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237 done_list = g_list_append(done_list, addr);
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238 }
239
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239 }
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240
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diff changeset
241 /* we're done if we don't have to remove rcpts */
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242 if (!non_rcpt_list) {
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243 return done_list;
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244 }
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245
239
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diff changeset
246 /* delete addresses of non_rcpt_list from done_list */
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247 for (rcpt_node = g_list_first(done_list); rcpt_node; rcpt_node = rcpt_node_next) {
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248 address *addr = (address *) (rcpt_node->data);
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249 GList *non_node;
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250
239
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251 rcpt_node_next = g_list_next(rcpt_node);
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diff changeset
252 foreach(non_rcpt_list, non_node) {
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253 address *non_addr = (address *) (non_node->data);
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diff changeset
254 if (addr_isequal(addr, non_addr)) {
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diff changeset
255 done_list = g_list_remove_link(done_list, rcpt_node);
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256 g_list_free_1(rcpt_node);
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diff changeset
257 /* this address is still in the children lists
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diff changeset
258 of the original address, simply mark them delivered */
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diff changeset
259 addr_mark_delivered(addr);
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diff changeset
260 break;
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261 }
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262 }
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263 }
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diff changeset
264 return done_list;
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265 }