ict.c
6.62 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
/*
The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
Copyright (C) 2001-2020 Aymeric MOIZARD amoizard@antisip.com
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <osip2/internal.h>
#include <osip2/osip.h>
#include "fsm.h"
#include "xixt.h"
int __osip_ict_init(osip_ict_t **ict, osip_t *osip, osip_message_t *invite) {
osip_route_t *route;
int i;
OSIP_TRACE(osip_trace(__FILE__, __LINE__, OSIP_INFO2, NULL, "allocating ICT context\n"));
*ict = (osip_ict_t *) osip_malloc(sizeof(osip_ict_t));
if (*ict == NULL)
return OSIP_NOMEM;
memset(*ict, 0, sizeof(osip_ict_t));
/* for INVITE retransmissions */
{
osip_via_t *via;
char *proto;
i = osip_message_get_via(invite, 0, &via); /* get top via */
if (i < 0) {
osip_free(*ict);
return i;
}
proto = via_get_protocol(via);
if (proto == NULL) {
osip_free(*ict);
return OSIP_SYNTAXERROR;
}
#ifdef USE_BLOCKINGSOCKET
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
/* for other reliable protocol than TCP, the timer
must be desactived by the external application */
(*ict)->timer_a_length = DEFAULT_T1;
if (64 * DEFAULT_T1 < 32000)
(*ict)->timer_d_length = 32000;
else
(*ict)->timer_d_length = 64 * DEFAULT_T1;
osip_gettimeofday(&(*ict)->timer_a_start, NULL);
add_gettimeofday(&(*ict)->timer_a_start, (*ict)->timer_a_length);
(*ict)->timer_d_start.tv_sec = -1; /* not started */
} else { /* reliable protocol is used: */
(*ict)->timer_a_length = -1; /* A is not ACTIVE */
(*ict)->timer_d_length = 0; /* MUST do the transition immediatly */
(*ict)->timer_a_start.tv_sec = -1; /* not started */
(*ict)->timer_d_start.tv_sec = -1; /* not started */
}
}
#else
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
/* for other reliable protocol than TCP, the timer
must be desactived by the external application */
(*ict)->timer_a_length = DEFAULT_T1;
if (64 * DEFAULT_T1 < 32000)
(*ict)->timer_d_length = 32000;
else
(*ict)->timer_d_length = 64 * DEFAULT_T1;
osip_gettimeofday(&(*ict)->timer_a_start, NULL);
add_gettimeofday(&(*ict)->timer_a_start, (*ict)->timer_a_length);
(*ict)->timer_d_start.tv_sec = -1; /* not started */
} else { /* reliable protocol is used: */
(*ict)->timer_a_length = DEFAULT_T1;
(*ict)->timer_d_length = 0; /* MUST do the transition immediatly */
osip_gettimeofday(&(*ict)->timer_a_start, NULL);
add_gettimeofday(&(*ict)->timer_a_start, (*ict)->timer_a_length);
(*ict)->timer_d_start.tv_sec = -1; /* not started */
}
}
#endif
/* for PROXY, the destination MUST be set by the application layer,
this one may not be correct. */
osip_message_get_route(invite, 0, &route);
if (route != NULL && route->url != NULL) {
osip_uri_param_t *lr_param;
osip_uri_uparam_get_byname(route->url, "lr", &lr_param);
if (lr_param == NULL) {
/* using uncompliant proxy: destination is the request-uri */
route = NULL;
}
}
if (route != NULL && route->url != NULL) {
int port = 5060;
if (route->url->port != NULL)
port = osip_atoi(route->url->port);
osip_ict_set_destination((*ict), osip_strdup(route->url->host), port);
} else {
int port = 5060;
/* search for maddr parameter */
osip_uri_param_t *maddr_param = NULL;
osip_uri_param_t *obr_param = NULL;
osip_uri_param_t *obp_param = NULL;
port = 5060;
if (invite->req_uri->port != NULL)
port = osip_atoi(invite->req_uri->port);
/* if ob was used in Contact, then exosip adds "x-obr" and "x-obp", thus, when
processing request, the ip/port destination are re-used here */
osip_uri_uparam_get_byname(invite->req_uri, "x-obr", &obr_param);
osip_uri_uparam_get_byname(invite->req_uri, "x-obp", &obp_param);
osip_uri_uparam_get_byname(invite->req_uri, "maddr", &maddr_param);
if (maddr_param != NULL && maddr_param->gvalue != NULL)
osip_ict_set_destination((*ict), osip_strdup(maddr_param->gvalue), port);
else if (obr_param != NULL && obr_param->gvalue != NULL && obp_param != NULL && obp_param->gvalue != NULL)
osip_ict_set_destination((*ict), osip_strdup(obr_param->gvalue), osip_atoi(obp_param->gvalue));
else
osip_ict_set_destination((*ict), osip_strdup(invite->req_uri->host), port);
}
(*ict)->timer_b_length = 64 * DEFAULT_T1;
osip_gettimeofday(&(*ict)->timer_b_start, NULL);
add_gettimeofday(&(*ict)->timer_b_start, (*ict)->timer_b_length);
/* Oups! A bug! */
/* (*ict)->port = 5060; */
return OSIP_SUCCESS;
}
int __osip_ict_free(osip_ict_t *ict) {
if (ict == NULL)
return OSIP_SUCCESS;
OSIP_TRACE(osip_trace(__FILE__, __LINE__, OSIP_INFO2, NULL, "free ict resource\n"));
osip_free(ict->destination);
osip_free(ict);
return OSIP_SUCCESS;
}
int osip_ict_set_destination(osip_ict_t *ict, char *destination, int port) {
if (ict == NULL)
return OSIP_BADPARAMETER;
if (ict->destination != NULL)
osip_free(ict->destination);
ict->destination = destination;
ict->port = port;
return OSIP_SUCCESS;
}
osip_event_t *__osip_ict_need_timer_a_event(osip_ict_t *ict, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(ict, &ict->timer_a_start, state == ICT_CALLING, transactionid, TIMEOUT_A);
}
osip_event_t *__osip_ict_need_timer_b_event(osip_ict_t *ict, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(ict, &ict->timer_b_start, state == ICT_CALLING, transactionid, TIMEOUT_B);
}
osip_event_t *__osip_ict_need_timer_d_event(osip_ict_t *ict, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(ict, &ict->timer_d_start, state == ICT_COMPLETED, transactionid, TIMEOUT_D);
}