build: Update config.guess and config.sub
[asterisk/asterisk.git] / res / res_pjsip_pidf_body_generator.c
1 /*
2  * asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2014, Digium, Inc.
5  *
6  * Mark Michelson <mmichelson@digium.com>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18
19 /*** MODULEINFO
20         <depend>pjproject</depend>
21         <depend>res_pjsip</depend>
22         <depend>res_pjsip_pubsub</depend>
23         <support_level>core</support_level>
24  ***/
25
26 #include "asterisk.h"
27
28 #include <pjsip.h>
29 #include <pjsip_simple.h>
30 #include <pjlib.h>
31
32 #include "asterisk/module.h"
33 #include "asterisk/res_pjsip.h"
34 #include "asterisk/res_pjsip_pubsub.h"
35 #include "asterisk/res_pjsip_presence_xml.h"
36 #include "asterisk/res_pjsip_body_generator_types.h"
37
38 static void *pidf_allocate_body(void *data)
39 {
40         struct ast_sip_exten_state_data *state_data = data;
41         char *local = ast_strdupa(state_data->local);
42         pjpidf_pres *pres;
43         pj_str_t entity;
44
45         pres = pjpidf_create(state_data->pool, pj_cstr(&entity, ast_strip_quoted(local, "<", ">")));
46
47         return pres;
48 }
49
50 static int pidf_generate_body_content(void *body, void *data)
51 {
52         pjpidf_tuple *tuple;
53         pj_str_t note, id, contact, priority;
54         char *statestring = NULL, *pidfstate = NULL, *pidfnote = NULL;
55         enum ast_sip_pidf_state local_state;
56         char sanitized[PJSIP_MAX_URL_SIZE];
57         pjpidf_pres *pres = body;
58         struct ast_sip_exten_state_data *state_data = data;
59
60         ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
61                         &pidfstate, &pidfnote, &local_state, 0);
62
63         if (!pjpidf_pres_add_note(state_data->pool, pres, pj_cstr(&note, pidfnote))) {
64                 ast_log(LOG_WARNING, "Unable to add note to PIDF presence\n");
65                 return -1;
66         }
67
68         if (!(tuple = pjpidf_pres_add_tuple(state_data->pool, pres,
69                                         pj_cstr(&id, state_data->exten)))) {
70                 ast_log(LOG_WARNING, "Unable to create PIDF tuple\n");
71                 return -1;
72         }
73
74         ast_sip_sanitize_xml(state_data->remote, sanitized, sizeof(sanitized));
75         pjpidf_tuple_set_contact(state_data->pool, tuple, pj_cstr(&contact, sanitized));
76         pjpidf_tuple_set_contact_prio(state_data->pool, tuple, pj_cstr(&priority, "1"));
77         pjpidf_status_set_basic_open(pjpidf_tuple_get_status(tuple),
78                         local_state == NOTIFY_OPEN || local_state == NOTIFY_INUSE);
79
80         return 0;
81 }
82
83 #define MAX_STRING_GROWTHS 5
84
85 static void pidf_to_string(void *body, struct ast_str **str)
86 {
87         pjpidf_pres *pres = body;
88         int growths = 0;
89         int size;
90
91         do {
92                 size = pjpidf_print(pres, ast_str_buffer(*str), ast_str_size(*str) - 1);
93                 if (size <= AST_PJSIP_XML_PROLOG_LEN) {
94                         ast_str_make_space(str, ast_str_size(*str) * 2);
95                         ++growths;
96                 }
97         } while (size <= AST_PJSIP_XML_PROLOG_LEN && growths < MAX_STRING_GROWTHS);
98         if (size <= AST_PJSIP_XML_PROLOG_LEN) {
99                 ast_log(LOG_WARNING, "PIDF body text too large\n");
100                 return;
101         }
102
103         *(ast_str_buffer(*str) + size) = '\0';
104         ast_str_update(*str);
105 }
106
107 static struct ast_sip_pubsub_body_generator pidf_body_generator = {
108         .type = "application",
109         .subtype = "pidf+xml",
110         .body_type = AST_SIP_EXTEN_STATE_DATA,
111         .allocate_body = pidf_allocate_body,
112         .generate_body_content = pidf_generate_body_content,
113         .to_string = pidf_to_string,
114         /* No need for a destroy_body callback since we use a pool */
115 };
116
117 static int load_module(void)
118 {
119         if (ast_sip_pubsub_register_body_generator(&pidf_body_generator)) {
120                 return AST_MODULE_LOAD_DECLINE;
121         }
122         return AST_MODULE_LOAD_SUCCESS;
123 }
124
125 static int unload_module(void)
126 {
127         ast_sip_pubsub_unregister_body_generator(&pidf_body_generator);
128         return 0;
129 }
130
131 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Extension State PIDF Provider",
132         .support_level = AST_MODULE_SUPPORT_CORE,
133         .load = load_module,
134         .unload = unload_module,
135         .load_pri = AST_MODPRI_CHANNEL_DEPEND,
136         .requires = "res_pjsip,res_pjsip_pubsub",
137 );