meillo@0: /*  MasqMail
meillo@0:     Copyright (C) 2000-2001 Oliver Kurth
meillo@0: 
meillo@0:     This program is free software; you can redistribute it and/or modify
meillo@0:     it under the terms of the GNU General Public License as published by
meillo@0:     the Free Software Foundation; either version 2 of the License, or
meillo@0:     (at your option) any later version.
meillo@0: 
meillo@0:     This program is distributed in the hope that it will be useful,
meillo@0:     but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
meillo@0:     GNU General Public License for more details.
meillo@0: 
meillo@0:     You should have received a copy of the GNU General Public License
meillo@0:     along with this program; if not, write to the Free Software
meillo@0:     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0: */
meillo@0: 
meillo@0: #include "masqmail.h"
meillo@0: #include <fnmatch.h>
meillo@0: 
meillo@0: gboolean addr_is_local(address *addr)
meillo@0: {
meillo@0:   GList *dom_node;
meillo@0:   GList *addr_node;
meillo@0:   address *a;
meillo@0: 
meillo@0:   foreach(conf.local_hosts, dom_node){
meillo@0:     if(addr->domain == NULL)
meillo@0:       return TRUE;
meillo@0:     if(fnmatch(dom_node->data, addr->domain, FNM_CASEFOLD) == 0){
meillo@0:       foreach(conf.not_local_addresses,addr_node){
meillo@0: 	a = create_address_qualified(addr_node->data, TRUE, conf.host_name);
meillo@0: 	if(addr_isequal(a,addr)){
meillo@0: 	  destroy_address(a);
meillo@0: 	  return FALSE;
meillo@0: 	}
meillo@0: 	destroy_address(a);
meillo@0:       }
meillo@0:       return TRUE;
meillo@0:     }
meillo@0:   }
meillo@0:   foreach(conf.local_addresses,addr_node){
meillo@0:     a = create_address_qualified(addr_node->data, TRUE, conf.host_name);
meillo@0:     if(addr_isequal(a,addr)){
meillo@0:       destroy_address(a);
meillo@0:       return TRUE;
meillo@0:     }
meillo@0:     destroy_address(a);
meillo@0:   }
meillo@0:   return FALSE;
meillo@0: }
meillo@0: 
meillo@0: static
meillo@0: gboolean addr_isequal_alias(address *addr1, address *addr2)
meillo@0: {
meillo@0:   return
meillo@0:     (conf.alias_local_cmp(addr1->local_part, addr2->local_part) == 0) &&
meillo@0:     (strcasecmp(addr1->domain, addr2->domain) == 0);
meillo@0: }
meillo@0: 
meillo@0: static
meillo@0: GList *parse_list(gchar *line)
meillo@0: {
meillo@0:   GList *list = NULL;
meillo@0:   gchar buf[256];
meillo@0:   gchar *p, *q;
meillo@0: 
meillo@0:   p = line;
meillo@0:   while(*p != 0){
meillo@0:     q = buf;
meillo@0:     while(isspace(*p)) p++;
meillo@0:     if(*p != '\"'){
meillo@0:       while(*p && (*p != ',') && (q < buf+255))
meillo@0: 	*(q++) = *(p++);
meillo@0:       *q = 0;
meillo@0:     }else{
meillo@0:       gboolean escape = FALSE;
meillo@0:       p++;
meillo@0:       while(*p && (*p != '\"' || escape) && (q < buf+255)){
meillo@0: 	if((*p == '\\') && !escape)
meillo@0: 	  escape = TRUE;
meillo@0: 	else{
meillo@0: 	  escape = FALSE;
meillo@0: 	  *(q++) = *p;
meillo@0: 	}
meillo@0: 	p++;
meillo@0:       }
meillo@0:       *q = 0;
meillo@0:       while(*p && (*p != ',')) p++;
meillo@0:     }
meillo@0:     list = g_list_append(list, g_strdup(g_strchomp(buf)));
meillo@0:     if(*p) p++;
meillo@0:   }
meillo@0:   return list;
meillo@0: }
meillo@0: 
meillo@0: GList *alias_expand(GList *alias_table, GList *rcpt_list, GList *non_rcpt_list)
meillo@0: {
meillo@0:   GList *done_list = NULL;
meillo@0:   GList *rcpt_node = g_list_copy(rcpt_list);
meillo@0: 
meillo@0:   while(rcpt_node != NULL){
meillo@0:     address *addr = (address *)(rcpt_node->data);
meillo@0:     DEBUG(5) debugf("alias_expand begin: '%s@%s'\n", addr->local_part, addr->domain);
meillo@0: //    if(addr_is_local(addr) && (addr->local_part[0] != '|') &&
meillo@0:     if(addr_is_local(addr) && 
meillo@0:         !(addr->flags & ADDR_FLAG_NOEXPAND)){
meillo@0:       gchar *val;
meillo@0:       
meillo@0:       /* special handling for postmaster */
meillo@0:       if(strcasecmp(addr->local_part, "postmaster") == 0)
meillo@0: 	val = (gchar *)table_find_func(alias_table, addr->local_part, strcasecmp);
meillo@0:       else
meillo@0: 	val = (gchar *)table_find_func(alias_table, addr->local_part, conf.alias_local_cmp);
meillo@0: 
meillo@0:       DEBUG(5) debugf("alias: '%s' is local\n", addr->local_part);
meillo@0:       if(val != NULL){
meillo@0: 	GList *val_list = parse_list(val);
meillo@0: 	GList *val_node;
meillo@0: 	GList *alias_list = NULL;
meillo@0: 
meillo@0: 	DEBUG(5) debugf("alias: '%s' -> '%s'\n", addr->local_part, val);
meillo@0: 	foreach(val_list, val_node){
meillo@0: 	  gchar *val = (gchar *)(val_node->data);
meillo@0: 	  address *alias_addr;
meillo@0: 	  address *addr_parent = NULL;
meillo@0: 
meillo@0: 	  if(val[0] == '|'){
meillo@0: 	    DEBUG(5) debugf("alias: %s is a pipe address\n", val);
meillo@0: 	    alias_addr = create_address_pipe(val);
meillo@0: 	    DEBUG(5) debugf("alias_pipe: %s is a pipe address\n", alias_addr->local_part);
meillo@0: 	  }else if(val[0] == '\\'){
meillo@0: 	    DEBUG(5) debugf("alias: shall not be expanded: '%s'\n", val);
meillo@0: 	    alias_addr = create_address_qualified(&(val[1]), TRUE, conf.host_name);
meillo@0: 	    alias_addr->flags |= ADDR_FLAG_NOEXPAND;
meillo@0: 	    DEBUG(5) debugf("alias: not expanded: '%s'\n",alias_addr->local_part);
meillo@0: 	  }else{
meillo@0: 	    alias_addr = create_address_qualified(val, TRUE, conf.host_name);
meillo@0: 
meillo@0: 	    /* search in parents for loops: */
meillo@0: 	    for(addr_parent = addr; addr_parent; addr_parent = addr_parent->parent){
meillo@0: 	      if(addr_isequal_alias(alias_addr, addr_parent)){
meillo@0: 		logwrite(LOG_ALERT, "detected alias loop, (ignoring): %s@%s -> %s@%s\n",
meillo@0: 			 addr_parent->local_part, addr_parent->domain,
meillo@0: 			 addr->local_part, addr->domain);
meillo@0: 		break;
meillo@0: 	      }
meillo@0: 	    }
meillo@0: 	  }
meillo@0: 	  if(!addr_parent){
meillo@0: 	    alias_list = g_list_append(alias_list, alias_addr);
meillo@0: 	    alias_addr->parent = addr;
meillo@0: 	  }
meillo@0: 	  g_free(val);
meillo@0: 	}
meillo@0: 	g_list_free(val_list);
meillo@0: 	addr->children = g_list_copy(alias_list);
meillo@0: 	rcpt_node = g_list_concat(rcpt_node, alias_list);
meillo@0:       }else{
meillo@0: 	DEBUG(5) debugf("alias: '%s' is completed\n", addr->local_part);
meillo@0: 	done_list = g_list_append(done_list, addr);
meillo@0:       }
meillo@0:     }else{
meillo@0:       DEBUG(5) debugf("alias: '%s@%s' is not local\n", addr->local_part, addr->domain);
meillo@0:       done_list = g_list_append(done_list, addr);
meillo@0:     }
meillo@0:     rcpt_node = g_list_next(rcpt_node);
meillo@0:   }
meillo@0: 
meillo@0:   /* delete addresses from done_list if they are in the non_rcpt_list */
meillo@0:   if(non_rcpt_list){
meillo@0:     GList *rcpt_node_next;
meillo@0:     for(rcpt_node = g_list_first(done_list);
meillo@0: 	 rcpt_node;
meillo@0: 	 rcpt_node = rcpt_node_next){
meillo@0:       address *addr = (address *)(rcpt_node->data);
meillo@0:       GList *non_node;
meillo@0: 
meillo@0:       rcpt_node_next = g_list_next(rcpt_node);
meillo@0: 
meillo@0:       foreach(non_rcpt_list, non_node){
meillo@0: 	address *non_addr = (address *)(non_node->data);
meillo@0: 	if(addr_isequal(addr, non_addr)){
meillo@0: 	  done_list = g_list_remove_link(done_list, rcpt_node);
meillo@0: 	  g_list_free_1(rcpt_node);
meillo@0: 	  addr_mark_delivered(addr); /* this address is still in the children lists
meillo@0: 				      of the original address */
meillo@0: 	  break;
meillo@0: 	}
meillo@0:       }
meillo@0:     }
meillo@0:   }
meillo@0:   return done_list;
meillo@0: }