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111 lines
2.9 KiB
111 lines
2.9 KiB
/*
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*
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* Copyright (C) 2001-2003 FhG Fokus
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*!
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* \file
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* \brief Kamailio core :: Name/alias handling
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* \author andrei
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* \ingroup core
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* Module: \ref core
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*/
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#include "str.h"
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#include "dprint.h"
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#include "mem/mem.h"
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struct host_alias{
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str alias;
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unsigned short port;
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unsigned short proto;
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struct host_alias* next;
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};
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extern struct host_alias* aliases;
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/** returns 1 if name is in the alias list; if port=0, port no is ignored
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* if proto=0, proto is ignored*/
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static inline int grep_aliases(char* name, int len, unsigned short port,
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unsigned short proto)
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{
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struct host_alias* a;
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if ((len>2)&&((*name)=='[')&&(name[len-1]==']')){
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/* ipv6 reference, skip [] */
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name++;
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len-=2;
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}
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for(a=aliases;a;a=a->next)
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if ((a->alias.len==len) && ((a->port==0) || (port==0) ||
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(a->port==port)) && ((a->proto==0) || (proto==0) ||
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(a->proto==proto)) && (strncasecmp(a->alias.s, name, len)==0))
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return 1;
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return 0;
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}
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/** adds an alias to the list (only if it isn't already there)
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* if port==0, the alias will match all the ports
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* if proto==0, the alias will match all the protocols
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* returns 1 if a new alias was added, 0 if a matching alias was already on
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* the list and -1 on error */
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static inline int add_alias(char* name, int len, unsigned short port,
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unsigned short proto)
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{
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struct host_alias* a;
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if ((port) && (proto)){
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/* don't add if there is already an alias matching it */
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if (grep_aliases(name,len, port, proto)) return 0;
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}else{
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/* don't add if already in the list with port or proto ==0*/
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for(a=aliases;a;a=a->next)
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if ((a->alias.len==len) && (a->port==port) && (a->proto==proto) &&
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(strncasecmp(a->alias.s, name, len)==0))
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return 0;
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}
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a=(struct host_alias*)pkg_malloc(sizeof(struct host_alias));
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if(a==0) goto error;
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a->alias.s=(char*)pkg_malloc(len+1);
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if (a->alias.s==0) goto error;
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a->alias.len=len;
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memcpy(a->alias.s, name, len);
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a->alias.s[len]=0; /* null terminate for easier printing*/
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a->port=port;
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a->proto=proto;
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a->next=aliases;
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aliases=a;
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return 1;
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error:
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LM_ERR("memory allocation error\n");
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if (a) pkg_free(a);
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return -1;
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}
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