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295 lines
6.2 KiB
295 lines
6.2 KiB
/*
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* mangler module
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*
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* $Id$
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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 ser, a free SIP server.
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*
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* ser 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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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* ser 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* History:
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* --------
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* 2003-04-07 first version.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "../../sr_module.h"
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#include "../../mem/mem.h"
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#include "../../dprint.h"
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#include "../../ut.h"
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#include "../../error.h"
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#include "mangler.h"
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#include "sdp_mangler.h"
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#include "contact_ops.h"
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#include "utils.h"
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#include "common.h"
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#ifdef DEMO
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#include "../../modules/tm/t_hooks.h"
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#include "../../modules/tm/tm_load.h"
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#include "../../modules/tm/h_table.h"
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struct tm_binds tmb;
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#endif
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MODULE_VERSION
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/*
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* Module destroy function prototype
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*/
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static void destroy (void);
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/*
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* Module initialization function prototype
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*/
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static int mod_init (void);
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#if 0 /* not used -- Wall complains */
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/* Header field fixup */
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static int fixup_char2str(void** param, int param_no);
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static int fixup_char2int (void **param, int param_no);
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static int fixup_char2uint (void **param, int param_no);
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#endif
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char *contact_flds_separator = DEFAULT_SEPARATOR;
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static param_export_t params[] = {
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{"contact_flds_separator",PARAM_STRING,&contact_flds_separator},
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{0, 0, 0}
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}; /*no params exported,perhaps I should add pre-compiled expressions */
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/*
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* Exported functions
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*/
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static cmd_export_t cmds[] =
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{
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{"sdp_mangle_ip", sdp_mangle_ip, 2,0, REQUEST_ROUTE|ONREPLY_ROUTE}, // fixup_char2str?
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{"sdp_mangle_port",sdp_mangle_port, 1,0, REQUEST_ROUTE|ONREPLY_ROUTE},// fixup_char2int if I use an int as offset
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{"encode_contact",encode_contact,2,0,REQUEST_ROUTE|ONREPLY_ROUTE},//fixup_char2str
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{"decode_contact",decode_contact,0,0,REQUEST_ROUTE},
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{"decode_contact_header",decode_contact_header,0,0,REQUEST_ROUTE|ONREPLY_ROUTE},
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{0, 0, 0, 0, 0}
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};
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/*
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* Module interface
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*/
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struct module_exports exports = {
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"mangler",
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cmds, /* Exported functions */
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0, /* RPC methods */
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params, /* Exported parameters */
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mod_init, /* module initialization function */
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0, /* response function */
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destroy, /* destroy function */
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0, /* oncancel function */
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0 /* child initialization function */
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};
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#ifdef DEMO
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/* MANGLING EXAMPLE */
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/* ================================================================= */
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static void func_invite(struct cell *t,struct sip_msg *msg,int code,void *param)
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{
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int i;
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//callback function
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if (!check_transaction_quadruple(msg))
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{
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//we do not have a correct message from/callid/cseq/to
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return;
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}
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i = encode_contact(msg,"enc_prefix","193.175.135.38");
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fprintf(stdout,"decode/encode = returned %d\n",i);fflush(stdout);
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if (t->is_invite)
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{
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if (msg->buf != NULL)
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{
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fprintf(stdout,"INVITE:received \n%s\n",msg->buf);fflush(stdout);
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i = sdp_mangle_port(msg,"1000",NULL);
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fprintf(stdout,"sdp_mangle_port returned %d\n",i);fflush(stdout);
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i = sdp_mangle_ip(msg,"10.0.0.0/16","123.124.125.126");
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fprintf(stdout,"sdp_mangle_ip returned %d\n",i);fflush(stdout);
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}
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else fprintf(stdout,"INVITE:received NULL\n");fflush(stdout);
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}
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else
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{
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fprintf(stdout,"NOT INVITE(REGISTER?) received \n%s\n",msg->buf);fflush(stdout);
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//i = decode_contact(msg,NULL,NULL);
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//fprintf(stdout,"decode/encode = returned %d\n",i);fflush(stdout);
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}
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fflush(stdout);
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}
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#endif
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int
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prepare ()
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{
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/* using pre-compiled expressions to speed things up*/
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compile_expresions(PORT_REGEX,IP_REGEX);
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#ifdef DEMO
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load_tm_f load_tm;
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fprintf(stdout,"===============NEW RUN================\n");
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//register callbacks
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if (!(load_tm=(load_tm_f)find_export("load_tm",NO_SCRIPT,0)))
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{
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printf("Error:FCP:prepare:cannot import load_tm\n");
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return -1;
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}
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if (load_tm(&tmb)==-1) return -1;
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if (tmb.register_tmcb(TMCB_REQUEST_OUT, func_invite, 0, 0) <= 0) return -1;
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#endif
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return 0;
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}
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static int
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mod_init (void)
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{
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ipExpression = NULL;
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portExpression = NULL;
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prepare ();
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/*
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* Might consider to compile at load time some regex to avoid compilation
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* every time I use this functions
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*/
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return 0;
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}
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static void
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destroy (void)
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{
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/*free some compiled regex expressions */
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free_compiled_expresions();
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#ifdef DEMO
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fprintf(stdout,"Freeing pre-compiled expressions\n");
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#endif
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return;
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}
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#ifdef O
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static int fixup_char2int (void **param, int param_no)
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{
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int offset,res;
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if (param_no == 1)
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{
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res = sscanf(*param,"%d",&offset);
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if (res != 1)
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{
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LOG (L_ERR,"fixup_char2int:Invalid value %s\n",(char *)(*param));
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return -1;
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}
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free(*param);
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*param = (void *)offset;/* value of offset */
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}
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return 0;
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}
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static int fixup_char2uint (void **param, int param_no)
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{
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int res;
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unsigned int newContentLength;
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if (param_no == 1)
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{
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res = sscanf(*param,"%u",&newContentLength);
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if (res != 1)
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{
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LOG (L_ERR,"fixup_char2uint:Invalid value %s\n",(char *)*param);
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return -1;
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}
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free(*param);
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*param = (void *)newContentLength;
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}
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return 0;
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}
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static int fixup_char2str(void** param, int param_no)
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{
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str* s;
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if (param_no == 1)
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{
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s = (str*)pkg_malloc(sizeof(str));
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if (!s)
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{
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LOG(L_ERR, "fixup_char2str: No memory left\n");
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return E_UNSPEC;
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}
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s->s = (char*)*param;
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s->len = strlen(s->s);
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*param = (void*)s;
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}
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else if (param_no == 2)
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{
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s = (str*)pkg_malloc(sizeof(str));
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if (!s)
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{
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LOG(L_ERR, "fixup_char2str: No memory left\n");
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return E_UNSPEC;
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}
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s->s = (char*)*param;
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s->len = strlen(s->s);
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*param = (void*)s;
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}
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return 0;
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}
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#endif
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