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130 lines
3.0 KiB
130 lines
3.0 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Jason Parker <jparker@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*** MODULEINFO
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<depend>pjproject</depend>
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<depend>res_pjsip</depend>
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<depend>res_pjsip_session</depend>
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include <pjsip.h>
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#include <pjsip_ua.h>
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#include "asterisk/res_pjsip.h"
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#include "asterisk/res_pjsip_session.h"
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#include "asterisk/module.h"
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static int dtmf_info_incoming_request(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
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{
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int res = 0;
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pjsip_msg_body *body = rdata->msg_info.msg->body;
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pjsip_tx_data *tdata;
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char buf[body ? body->len : 0];
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char *cur = buf;
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char *line;
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char event = '\0';
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unsigned int duration = 0;
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if (!body || !ast_sip_is_content_type(&body->content_type, "application", "dtmf-relay")) {
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return 0;
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}
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body->print_body(body, buf, body->len);
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while ((line = strsep(&cur, "\r\n"))) {
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char *c;
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if (!(c = strchr(line, '='))) {
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continue;
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}
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*c++ = '\0';
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c = ast_skip_blanks(c);
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if (!strcasecmp(line, "signal")) {
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if (c[0] == '!' || c[0] == '*' || c[0] == '#' ||
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('0' <= c[0] && c[0] <= '9') ||
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('A' <= c[0] && c[0] <= 'D') ||
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('a' <= c[0] && c[0] <= 'd')) {
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event = c[0];
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} else {
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ast_log(LOG_ERROR, "Invalid DTMF event signal in INFO message.\n");
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res = -1;
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break;
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}
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} else if (!strcasecmp(line, "duration")) {
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sscanf(c, "%30u", &duration);
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}
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}
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if (!duration) {
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duration = 100;
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}
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if (event == '!') {
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struct ast_frame f = { AST_FRAME_CONTROL, { AST_CONTROL_FLASH, } };
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ast_queue_frame(session->channel, &f);
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} else if (event != '\0') {
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struct ast_frame f = { AST_FRAME_DTMF, };
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f.len = duration;
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f.subclass.integer = event;
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ast_queue_frame(session->channel, &f);
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} else {
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res = -1;
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}
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if (pjsip_dlg_create_response(session->inv_session->dlg, rdata, !res ? 200 : 500, NULL, &tdata) == PJ_SUCCESS) {
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struct pjsip_transaction *tsx = pjsip_rdata_get_tsx(rdata);
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pjsip_dlg_send_response(session->inv_session->dlg, tsx, tdata);
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}
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return res;
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}
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static struct ast_sip_session_supplement dtmf_info_supplement = {
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.method = "INFO",
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.incoming_request = dtmf_info_incoming_request,
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};
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static int load_module(void)
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{
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ast_sip_session_register_supplement(&dtmf_info_supplement);
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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ast_sip_session_unregister_supplement(&dtmf_info_supplement);
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return 0;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP DTMF INFO Support",
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.load = load_module,
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.unload = unload_module,
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.load_pri = AST_MODPRI_APP_DEPEND,
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);
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