masqmail

annotate src/alias.c @ 366:41958685480d

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Switched to `type *name' style Andrew Koenig's ``C Traps and Pitfalls'' (Ch.2.1) convinced me that it is best to go with the way C had been designed. The ``declaration reflects use'' concept conflicts with a ``type* name'' notation. Hence I switched.
author markus schnalke <meillo@marmaro.de>
date Thu, 22 Sep 2011 15:07:40 +0200
parents 273f6c9eb6a2
children b27f66555ba8
rev   line source
meillo@0 1 /* MasqMail
meillo@0 2 Copyright (C) 2000-2001 Oliver Kurth
meillo@239 3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@0 4
meillo@0 5 This program is free software; you can redistribute it and/or modify
meillo@0 6 it under the terms of the GNU General Public License as published by
meillo@0 7 the Free Software Foundation; either version 2 of the License, or
meillo@0 8 (at your option) any later version.
meillo@0 9
meillo@0 10 This program is distributed in the hope that it will be useful,
meillo@0 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 13 GNU General Public License for more details.
meillo@0 14
meillo@0 15 You should have received a copy of the GNU General Public License
meillo@0 16 along with this program; if not, write to the Free Software
meillo@0 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 18 */
meillo@0 19
meillo@0 20 #include "masqmail.h"
meillo@0 21 #include <fnmatch.h>
meillo@0 22
meillo@10 23 gboolean
meillo@366 24 addr_is_local(address *addr)
meillo@0 25 {
meillo@10 26 GList *dom_node;
meillo@10 27 GList *addr_node;
meillo@10 28 address *a;
meillo@0 29
meillo@239 30 if (addr->domain == NULL) {
meillo@239 31 return TRUE;
meillo@239 32 }
meillo@10 33 foreach(conf.local_hosts, dom_node) {
meillo@239 34 /* Note: FNM_CASEFOLD is a GNU extension */
meillo@239 35 if (fnmatch(dom_node->data, addr->domain, FNM_CASEFOLD) != 0) {
meillo@239 36 /* no match, try next */
meillo@239 37 continue;
meillo@239 38 }
meillo@239 39 foreach(conf.not_local_addresses, addr_node) {
meillo@239 40 a = create_address_qualified(addr_node->data, TRUE, conf.host_name);
meillo@239 41 DEBUG(6) debugf("not_local_addresses: addr_node->data=%s a->address=%s\n",
meillo@239 42 addr_node->data, a->address);
meillo@244 43 if (addr_isequal(a, addr, conf.localpartcmp)) {
meillo@10 44 destroy_address(a);
meillo@239 45 /* in local_hosts but also in not_local_addresses */
meillo@239 46 return FALSE;
meillo@10 47 }
meillo@239 48 destroy_address(a);
meillo@10 49 }
meillo@239 50 /* in local_hosts */
meillo@239 51 return TRUE;
meillo@0 52 }
meillo@10 53 foreach(conf.local_addresses, addr_node) {
meillo@10 54 a = create_address_qualified(addr_node->data, TRUE, conf.host_name);
meillo@114 55 DEBUG(6) debugf("local_addresses: addr_node->data=%s a->address=%s\n",
meillo@114 56 addr_node->data, a->address);
meillo@244 57 if (addr_isequal(a, addr, conf.localpartcmp)) {
meillo@10 58 destroy_address(a);
meillo@239 59 /* in local_addresses */
meillo@10 60 return TRUE;
meillo@10 61 }
meillo@10 62 destroy_address(a);
meillo@10 63 }
meillo@10 64 return FALSE;
meillo@0 65 }
meillo@0 66
meillo@10 67 static GList*
meillo@366 68 parse_list(gchar *line)
meillo@0 69 {
meillo@10 70 GList *list = NULL;
meillo@10 71 gchar buf[256];
meillo@10 72 gchar *p, *q;
meillo@0 73
meillo@10 74 p = line;
meillo@14 75 while (*p != '\0') {
meillo@10 76 q = buf;
meillo@10 77 while (isspace(*p))
meillo@10 78 p++;
meillo@239 79 if (*p != '"') {
meillo@10 80 while (*p && (*p != ',') && (q < buf + 255))
meillo@10 81 *(q++) = *(p++);
meillo@14 82 *q = '\0';
meillo@10 83 } else {
meillo@10 84 gboolean escape = FALSE;
meillo@10 85 p++;
meillo@239 86 while (*p && (*p != '"' || escape) && (q < buf + 255)) {
meillo@10 87 if ((*p == '\\') && !escape)
meillo@10 88 escape = TRUE;
meillo@10 89 else {
meillo@10 90 escape = FALSE;
meillo@10 91 *(q++) = *p;
meillo@10 92 }
meillo@10 93 p++;
meillo@10 94 }
meillo@14 95 *q = '\0';
meillo@10 96 while (*p && (*p != ','))
meillo@10 97 p++;
meillo@10 98 }
meillo@10 99 list = g_list_append(list, g_strdup(g_strchomp(buf)));
meillo@10 100 if (*p)
meillo@10 101 p++;
meillo@0 102 }
meillo@10 103 return list;
meillo@0 104 }
meillo@0 105
meillo@239 106 /*
meillo@239 107 addr is assumed to be local and no pipe address nor not-to-expand
meillo@239 108 */
meillo@239 109 static GList*
meillo@366 110 expand_one(GList *alias_table, address *addr)
meillo@239 111 {
meillo@239 112 GList *val_list;
meillo@239 113 GList *val_node;
meillo@239 114 GList *alias_list = NULL;
meillo@239 115 GList *alias_node;
meillo@239 116 gchar *val;
meillo@366 117 address *alias_addr;
meillo@239 118
meillo@239 119 /* expand the local alias */
meillo@239 120 DEBUG(6) debugf("alias: '%s' is local and will get expanded\n", addr->local_part);
meillo@239 121
meillo@239 122 if (strcasecmp(addr->local_part, "postmaster") == 0) {
meillo@239 123 /* postmaster must always be matched caseless
meillo@239 124 see RFC 822 and RFC 5321 */
meillo@239 125 val = (gchar *) table_find_func(alias_table, addr->local_part, strcasecmp);
meillo@239 126 } else {
meillo@244 127 val = (gchar *) table_find_func(alias_table, addr->local_part, conf.localpartcmp);
meillo@239 128 }
meillo@239 129 if (!val) {
meillo@239 130 DEBUG(5) debugf("alias: '%s' is fully expanded, hence completed\n",
meillo@239 131 addr->local_part);
meillo@239 132 return g_list_append(NULL, addr);
meillo@239 133 }
meillo@239 134
meillo@239 135 DEBUG(5) debugf("alias: '%s' -> '%s'\n", addr->local_part, val);
meillo@239 136 val_list = parse_list(val);
meillo@239 137 alias_list = NULL;
meillo@239 138
meillo@239 139 foreach(val_list, val_node) {
meillo@239 140 gchar *val = (gchar *) (val_node->data);
meillo@239 141 address *alias_addr;
meillo@239 142 address *addr_parent = NULL;
meillo@239 143
meillo@239 144 DEBUG(6) debugf("alias: processing '%s'\n", val);
meillo@239 145
meillo@239 146 if (val[0] == '\\') {
meillo@239 147 DEBUG(5) debugf("alias: '%s' is marked as final, hence completed\n", val);
meillo@239 148 alias_addr = create_address_qualified(val+1, TRUE, conf.host_name);
meillo@239 149 g_free(val);
meillo@239 150 DEBUG(6) debugf("alias: address generated: '%s'\n",
meillo@239 151 alias_addr->local_part);
meillo@239 152 alias_list = g_list_append(alias_list, alias_addr);
meillo@239 153 continue;
meillo@239 154 }
meillo@239 155
meillo@239 156 if (val[0] == '|') {
meillo@239 157 DEBUG(5) debugf("alias: '%s' is a pipe address\n", val);
meillo@309 158 alias_addr = create_address_pipe(val);
meillo@239 159 g_free(val);
meillo@239 160 DEBUG(6) debugf("alias: pipe generated: %s\n",
meillo@239 161 alias_addr->local_part);
meillo@239 162 alias_list = g_list_append(alias_list, alias_addr);
meillo@239 163 continue;
meillo@239 164 }
meillo@239 165
meillo@239 166 alias_addr = create_address_qualified(val, TRUE, conf.host_name);
meillo@239 167 g_free(val);
meillo@239 168
meillo@239 169 if (!addr_is_local(alias_addr)) {
meillo@239 170 DEBUG(5) debugf("alias: '%s@%s' is non-local, hence completed\n",
meillo@239 171 alias_addr->local_part, alias_addr->domain);
meillo@239 172 alias_list = g_list_append(alias_list, alias_addr);
meillo@239 173 continue;
meillo@239 174 }
meillo@239 175
meillo@242 176 /* addr is local and to expand at this point */
meillo@242 177 /* but first ... search in parents for loops: */
meillo@244 178 if (addr_isequal_parent(addr, alias_addr, conf.localpartcmp)) {
meillo@239 179 /* loop detected, ignore this path */
meillo@242 180 logwrite(LOG_ALERT, "alias: detected loop, hence ignoring '%s'\n",
meillo@242 181 alias_addr->local_part);
meillo@239 182 continue;
meillo@239 183 }
meillo@239 184 alias_addr->parent = addr;
meillo@239 185
meillo@239 186 /* recurse */
meillo@239 187 DEBUG(6) debugf("alias: >>\n");
meillo@239 188 alias_node = expand_one(alias_table, alias_addr);
meillo@239 189 DEBUG(6) debugf("alias: <<\n");
meillo@239 190 if (alias_node) {
meillo@239 191 alias_list = g_list_concat(alias_list, alias_node);
meillo@239 192 }
meillo@239 193 }
meillo@239 194 g_list_free(val_list);
meillo@239 195 addr->children = g_list_copy(alias_list);
meillo@239 196
meillo@239 197 return alias_list;
meillo@239 198 }
meillo@239 199
meillo@10 200 GList*
meillo@366 201 alias_expand(GList *alias_table, GList *rcpt_list, GList *non_rcpt_list)
meillo@0 202 {
meillo@239 203 GList *rcpt_node = NULL;
meillo@239 204 GList *alias_list = NULL;
meillo@10 205 GList *done_list = NULL;
meillo@239 206 GList *rcpt_node_next = NULL;
meillo@239 207 address *addr = NULL;
meillo@0 208
meillo@239 209 for (rcpt_node=g_list_copy(rcpt_list);
meillo@239 210 rcpt_node;
meillo@239 211 rcpt_node=g_list_next(rcpt_node)) {
meillo@0 212
meillo@239 213 addr = (address *) (rcpt_node->data);
meillo@239 214 if (addr_is_local(addr)) {
meillo@239 215 DEBUG(5) debugf("alias: (orig rcpt addr) expand local '%s'\n",
meillo@239 216 addr->local_part);
meillo@239 217 alias_list = expand_one(alias_table, addr);
meillo@239 218 if (alias_list) {
meillo@239 219 done_list = g_list_concat(done_list, alias_list);
meillo@10 220 }
meillo@10 221 } else {
meillo@239 222 DEBUG(5) debugf("alias: (orig rcpt addr) don't expand non-local '%s@%s'\n",
meillo@239 223 addr->local_part, addr->domain);
meillo@10 224 done_list = g_list_append(done_list, addr);
meillo@10 225 }
meillo@0 226 }
meillo@0 227
meillo@239 228 /* we're done if we don't have to remove rcpts */
meillo@239 229 if (!non_rcpt_list) {
meillo@239 230 return done_list;
meillo@239 231 }
meillo@0 232
meillo@239 233 /* delete addresses of non_rcpt_list from done_list */
meillo@239 234 for (rcpt_node = g_list_first(done_list); rcpt_node; rcpt_node = rcpt_node_next) {
meillo@239 235 address *addr = (address *) (rcpt_node->data);
meillo@239 236 GList *non_node;
meillo@0 237
meillo@239 238 rcpt_node_next = g_list_next(rcpt_node);
meillo@239 239 foreach(non_rcpt_list, non_node) {
meillo@239 240 address *non_addr = (address *) (non_node->data);
meillo@244 241 if (addr_isequal(addr, non_addr, conf.localpartcmp)) {
meillo@239 242 done_list = g_list_remove_link(done_list, rcpt_node);
meillo@239 243 g_list_free_1(rcpt_node);
meillo@239 244 /* this address is still in the children lists
meillo@239 245 of the original address, simply mark them delivered */
meillo@239 246 addr_mark_delivered(addr);
meillo@239 247 break;
meillo@10 248 }
meillo@10 249 }
meillo@0 250 }
meillo@10 251 return done_list;
meillo@0 252 }