Merge commit 'origin/ser_core_cvs'
[sip-router] / receive.c
1 /* 
2  *$Id$
3  *
4  * Copyright (C) 2001-2003 FhG Fokus
5  *
6  * This file is part of ser, a free SIP server.
7  *
8  * ser is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version
12  *
13  * For a license to use the ser software under conditions
14  * other than those described here, or to purchase support for this
15  * software, please contact iptel.org by e-mail at the following addresses:
16  *    info@iptel.org
17  *
18  * ser is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License 
24  * along with this program; if not, write to the Free Software 
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
26  *
27  * History:
28  * ---------
29  * 2003-02-28 scratchpad compatibility abandoned (jiri)
30  * 2003-01-29 transport-independent message zero-termination in
31  *            receive_msg (jiri)
32  * 2003-02-07 undoed jiri's zero term. changes (they break tcp) (andrei)
33  * 2003-02-10 moved zero-term in the calling functions (udp_receive &
34  *            tcp_read_req)
35  * 2003-08-13 fixed exec_pre_cb returning 0 (backported from stable) (andrei)
36  * 2004-02-06 added user preferences support - destroy_avps() (bogdan)
37  * 2004-04-30 exec_pre_cb is called after basic sanity checks (at least one
38  *            via present & parsed ok)  (andrei)
39  * 2004-08-23 avp core changed - destroy_avp-> reset_avps (bogdan)
40  * 2006-11-29 nonsip_msg hooks called for non-sip msg (e.g HTTP) (andrei)
41  */
42
43
44 #include <string.h>
45 #include <stdlib.h>
46 #include <sys/time.h>
47
48 #include "receive.h"
49 #include "globals.h"
50 #include "dprint.h"
51 #include "route.h"
52 #include "parser/msg_parser.h"
53 #include "forward.h"
54 #include "action.h"
55 #include "mem/mem.h"
56 #include "stats.h"
57 #include "ip_addr.h"
58 #include "script_cb.h"
59 #include "nonsip_hooks.h"
60 #include "dset.h"
61 #include "usr_avp.h"
62 #include "select_buf.h"
63
64 #include "tcp_server.h" /* for tcpconn_add_alias */
65 #include "tcp_options.h" /* for access to tcp_accept_aliases*/
66 #include "cfg/cfg.h"
67
68 #ifdef DEBUG_DMALLOC
69 #include <mem/dmalloc.h>
70 #endif
71
72 unsigned int msg_no=0;
73 /* address preset vars */
74 str default_global_address={0,0};
75 str default_global_port={0,0};
76 str default_via_address={0,0};
77 str default_via_port={0,0};
78
79
80
81 /* WARNING: buf must be 0 terminated (buf[len]=0) or some things might 
82  * break (e.g.: modules/textops)
83  */
84 int receive_msg(char* buf, unsigned int len, struct receive_info* rcv_info) 
85 {
86         struct sip_msg* msg;
87         int ret;
88         struct run_act_ctx ra_ctx;
89 #ifdef STATS
90         int skipped = 1;
91         struct timeval tvb, tve;        
92         struct timezone tz;
93         unsigned int diff;
94 #endif
95
96         msg=pkg_malloc(sizeof(struct sip_msg));
97         if (msg==0) {
98                 LOG(L_ERR, "ERROR: receive_msg: no mem for sip_msg\n");
99                 goto error00;
100         }
101         msg_no++;
102         /* number of vias parsed -- good for diagnostic info in replies */
103         via_cnt=0;
104
105         memset(msg,0, sizeof(struct sip_msg)); /* init everything to 0 */
106         /* fill in msg */
107         msg->buf=buf;
108         msg->len=len;
109         /* zero termination (termination of orig message bellow not that
110            useful as most of the work is done with scratch-pad; -jiri  */
111         /* buf[len]=0; */ /* WARNING: zero term removed! */
112         msg->rcv=*rcv_info;
113         msg->id=msg_no;
114         msg->set_global_address=default_global_address;
115         msg->set_global_port=default_global_port;
116         
117         if (parse_msg(buf,len, msg)!=0){
118                 LOG(L_ERR, "ERROR: receive_msg: parse_msg failed\n");
119                 goto error02;
120         }
121         DBG("After parse_msg...\n");
122
123
124         /* ... clear branches from previous message */
125         clear_branches();
126         reset_static_buffer();
127
128         if (msg->first_line.type==SIP_REQUEST){
129                 if (!IS_SIP(msg)){
130                         if (nonsip_msg_run_hooks(msg)!=NONSIP_MSG_ACCEPT)
131                                 goto end; /* drop the message */
132                 }
133                 /* sanity checks */
134                 if ((msg->via1==0) || (msg->via1->error!=PARSE_OK)){
135                         /* no via, send back error ? */
136                         LOG(L_ERR, "ERROR: receive_msg: no via found in request\n");
137                         goto error02;
138                 }
139                 /* check if necessary to add receive?->moved to forward_req */
140                 /* check for the alias stuff */
141 #ifdef USE_TCP
142                 if (msg->via1->alias && cfg_get(tcp, tcp_cfg, accept_aliases) && 
143                                 (((rcv_info->proto==PROTO_TCP) && !tcp_disable)
144 #ifdef USE_TLS
145                                         || ((rcv_info->proto==PROTO_TLS) && !tls_disable)
146 #endif
147                                 )
148                         ){
149                         if (tcpconn_add_alias(rcv_info->proto_reserved1, msg->via1->port,
150                                                                         rcv_info->proto)!=0){
151                                 LOG(L_ERR, " ERROR: receive_msg: tcp alias failed\n");
152                                 /* continue */
153                         }
154                 }
155 #endif
156                         
157         /*      skip: */
158                 DBG("preparing to run routing scripts...\n");
159 #ifdef  STATS
160                 gettimeofday( & tvb, &tz );
161 #endif
162                 /* execute pre-script callbacks, if any; -jiri */
163                 /* if some of the callbacks said not to continue with
164                    script processing, don't do so
165                    if we are here basic sanity checks are already done
166                    (like presence of at least one via), so you can count
167                    on via1 being parsed in a pre-script callback --andrei
168                 */
169                 if (exec_pre_req_cb(msg)==0 )
170                         goto end; /* drop the request */
171
172                 set_route_type(REQUEST_ROUTE);
173                 /* exec the routing script */
174                 init_run_actions_ctx(&ra_ctx);
175                 if (run_actions(&ra_ctx, main_rt.rlist[DEFAULT_RT], msg)<0){
176                         LOG(L_WARN, "WARNING: receive_msg: "
177                                         "error while trying script\n");
178                         goto error_req;
179                 }
180
181 #ifdef STATS
182                 gettimeofday( & tve, &tz );
183                 diff = (tve.tv_sec-tvb.tv_sec)*1000000+(tve.tv_usec-tvb.tv_usec);
184                 stats->processed_requests++;
185                 stats->acc_req_time += diff;
186                 DBG("successfully ran routing scripts...(%d usec)\n", diff);
187                 STATS_RX_REQUEST( msg->first_line.u.request.method_value );
188 #endif
189
190                 /* execute post request-script callbacks */
191                 exec_post_req_cb(msg);
192         }else if (msg->first_line.type==SIP_REPLY){
193                 /* sanity checks */
194                 if ((msg->via1==0) || (msg->via1->error!=PARSE_OK)){
195                         /* no via, send back error ? */
196                         LOG(L_ERR, "ERROR: receive_msg: no via found in reply\n");
197                         goto error02;
198                 }
199
200 #ifdef STATS
201                 gettimeofday( & tvb, &tz );
202                 STATS_RX_RESPONSE ( msg->first_line.u.reply.statuscode / 100 );
203 #endif
204                 
205                 /* execute pre-script callbacks, if any; -jiri */
206                 /* if some of the callbacks said not to continue with
207                    script processing, don't do so
208                    if we are here basic sanity checks are already done
209                    (like presence of at least one via), so you can count
210                    on via1 being parsed in a pre-script callback --andrei
211                 */
212                 if (exec_pre_rpl_cb(msg)==0 )
213                         goto end; /* drop the request */
214
215                 /* exec the onreply routing script */
216                 if (onreply_rt.rlist[DEFAULT_RT]){
217                         set_route_type(ONREPLY_ROUTE);
218                         init_run_actions_ctx(&ra_ctx);
219                         ret=run_actions(&ra_ctx, onreply_rt.rlist[DEFAULT_RT], msg);
220                         if (ret<0){
221                                 LOG(L_WARN, "WARNING: receive_msg: "
222                                                 "error while trying onreply script\n");
223                                 goto error_rpl;
224                         }else if (ret==0) goto skip_send_reply; /* drop the message, 
225                                                                                                            no error */
226                 }
227                 /* send the msg */
228                 forward_reply(msg);
229         skip_send_reply:
230 #ifdef STATS
231                 gettimeofday( & tve, &tz );
232                 diff = (tve.tv_sec-tvb.tv_sec)*1000000+(tve.tv_usec-tvb.tv_usec);
233                 stats->processed_responses++;
234                 stats->acc_res_time+=diff;
235                 DBG("successfully ran reply processing...(%d usec)\n", diff);
236 #endif
237
238                 /* execute post reply-script callbacks */
239                 exec_post_rpl_cb(msg);
240         }
241
242 end:
243 #ifdef STATS
244         skipped = 0;
245 #endif
246         /* free possible loaded avps -bogdan */
247         reset_avps();
248         DBG("receive_msg: cleaning up\n");
249         free_sip_msg(msg);
250         pkg_free(msg);
251 #ifdef STATS
252         if (skipped) STATS_RX_DROPS;
253 #endif
254         return 0;
255 error_rpl:
256         /* execute post reply-script callbacks */
257         exec_post_rpl_cb(msg);
258         reset_avps();
259         goto error02;
260 error_req:
261         DBG("receive_msg: error:...\n");
262         /* execute post request-script callbacks */
263         exec_post_req_cb(msg);
264         /* free possible loaded avps -bogdan */
265         reset_avps();
266 error02:
267         free_sip_msg(msg);
268         pkg_free(msg);
269 error00:
270         STATS_RX_DROPS;
271         return -1;
272 }
273