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-rw-r--r--pjsip-apps/src/samples/stateless_proxy.c255
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diff --git a/pjsip-apps/src/samples/stateless_proxy.c b/pjsip-apps/src/samples/stateless_proxy.c
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+/* $Id: stateless_proxy.c 3553 2011-05-05 06:14:19Z nanang $ */
+/*
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#define THIS_FILE "stateless_proxy.c"
+
+/* Common proxy functions */
+#define STATEFUL 0
+#include "proxy.h"
+
+
+/* Callback to be called to handle incoming requests. */
+static pj_bool_t on_rx_request( pjsip_rx_data *rdata );
+
+/* Callback to be called to handle incoming response. */
+static pj_bool_t on_rx_response( pjsip_rx_data *rdata );
+
+
+static pj_status_t init_stateless_proxy(void)
+{
+ static pjsip_module mod_stateless_proxy =
+ {
+ NULL, NULL, /* prev, next. */
+ { "mod-stateless-proxy", 19 }, /* Name. */
+ -1, /* Id */
+ PJSIP_MOD_PRIORITY_UA_PROXY_LAYER, /* Priority */
+ NULL, /* load() */
+ NULL, /* start() */
+ NULL, /* stop() */
+ NULL, /* unload() */
+ &on_rx_request, /* on_rx_request() */
+ &on_rx_response, /* on_rx_response() */
+ NULL, /* on_tx_request. */
+ NULL, /* on_tx_response() */
+ NULL, /* on_tsx_state() */
+ };
+
+ pj_status_t status;
+
+ /* Register our module to receive incoming requests. */
+ status = pjsip_endpt_register_module( global.endpt, &mod_stateless_proxy);
+ PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+
+ return PJ_SUCCESS;
+}
+
+
+/* Callback to be called to handle incoming requests. */
+static pj_bool_t on_rx_request( pjsip_rx_data *rdata )
+{
+ pjsip_tx_data *tdata;
+ pj_status_t status;
+
+
+ /* Verify incoming request */
+ status = proxy_verify_request(rdata);
+ if (status != PJ_SUCCESS) {
+ app_perror("RX invalid request", status);
+ return PJ_TRUE;
+ }
+
+ /*
+ * Request looks sane, next clone the request to create transmit data.
+ */
+ status = pjsip_endpt_create_request_fwd(global.endpt, rdata, NULL,
+ NULL, 0, &tdata);
+ if (status != PJ_SUCCESS) {
+ pjsip_endpt_respond_stateless(global.endpt, rdata,
+ PJSIP_SC_INTERNAL_SERVER_ERROR, NULL,
+ NULL, NULL);
+ return PJ_TRUE;
+ }
+
+
+ /* Process routing */
+ status = proxy_process_routing(tdata);
+ if (status != PJ_SUCCESS) {
+ app_perror("Error processing route", status);
+ return PJ_TRUE;
+ }
+
+ /* Calculate target */
+ status = proxy_calculate_target(rdata, tdata);
+ if (status != PJ_SUCCESS) {
+ app_perror("Error calculating target", status);
+ return PJ_TRUE;
+ }
+
+ /* Target is set, forward the request */
+ status = pjsip_endpt_send_request_stateless(global.endpt, tdata,
+ NULL, NULL);
+ if (status != PJ_SUCCESS) {
+ app_perror("Error forwarding request", status);
+ return PJ_TRUE;
+ }
+
+ return PJ_TRUE;
+}
+
+
+/* Callback to be called to handle incoming response. */
+static pj_bool_t on_rx_response( pjsip_rx_data *rdata )
+{
+ pjsip_tx_data *tdata;
+ pjsip_response_addr res_addr;
+ pjsip_via_hdr *hvia;
+ pj_status_t status;
+
+ /* Create response to be forwarded upstream (Via will be stripped here) */
+ status = pjsip_endpt_create_response_fwd(global.endpt, rdata, 0, &tdata);
+ if (status != PJ_SUCCESS) {
+ app_perror("Error creating response", status);
+ return PJ_TRUE;
+ }
+
+ /* Get topmost Via header */
+ hvia = (pjsip_via_hdr*) pjsip_msg_find_hdr(tdata->msg, PJSIP_H_VIA, NULL);
+ if (hvia == NULL) {
+ /* Invalid response! Just drop it */
+ pjsip_tx_data_dec_ref(tdata);
+ return PJ_TRUE;
+ }
+
+ /* Calculate the address to forward the response */
+ pj_bzero(&res_addr, sizeof(res_addr));
+ res_addr.dst_host.type = PJSIP_TRANSPORT_UDP;
+ res_addr.dst_host.flag = pjsip_transport_get_flag_from_type(PJSIP_TRANSPORT_UDP);
+
+ /* Destination address is Via's received param */
+ res_addr.dst_host.addr.host = hvia->recvd_param;
+ if (res_addr.dst_host.addr.host.slen == 0) {
+ /* Someone has messed up our Via header! */
+ res_addr.dst_host.addr.host = hvia->sent_by.host;
+ }
+
+ /* Destination port is the rpot */
+ if (hvia->rport_param != 0 && hvia->rport_param != -1)
+ res_addr.dst_host.addr.port = hvia->rport_param;
+
+ if (res_addr.dst_host.addr.port == 0) {
+ /* Ugh, original sender didn't put rport!
+ * At best, can only send the response to the port in Via.
+ */
+ res_addr.dst_host.addr.port = hvia->sent_by.port;
+ }
+
+ /* Forward response */
+ status = pjsip_endpt_send_response(global.endpt, &res_addr, tdata,
+ NULL, NULL);
+ if (status != PJ_SUCCESS) {
+ app_perror("Error forwarding response", status);
+ return PJ_TRUE;
+ }
+
+ return PJ_TRUE;
+}
+
+
+/*
+ * main()
+ */
+int main(int argc, char *argv[])
+{
+ pj_status_t status;
+
+ global.port = 5060;
+ pj_log_set_level(4);
+
+ status = init_options(argc, argv);
+ if (status != PJ_SUCCESS)
+ return 1;
+
+ status = init_stack();
+ if (status != PJ_SUCCESS) {
+ app_perror("Error initializing stack", status);
+ return 1;
+ }
+
+ status = init_proxy();
+ if (status != PJ_SUCCESS) {
+ app_perror("Error initializing proxy", status);
+ return 1;
+ }
+
+ status = init_stateless_proxy();
+ if (status != PJ_SUCCESS) {
+ app_perror("Error initializing stateless proxy", status);
+ return 1;
+ }
+
+#if PJ_HAS_THREADS
+ status = pj_thread_create(global.pool, "sproxy", &worker_thread,
+ NULL, 0, 0, &global.thread);
+ if (status != PJ_SUCCESS) {
+ app_perror("Error creating thread", status);
+ return 1;
+ }
+
+ while (!global.quit_flag) {
+ char line[10];
+
+ puts("\n"
+ "Menu:\n"
+ " q quit\n"
+ " d dump status\n"
+ " dd dump detailed status\n"
+ "");
+
+ if (fgets(line, sizeof(line), stdin) == NULL) {
+ puts("EOF while reading stdin, will quit now..");
+ global.quit_flag = PJ_TRUE;
+ break;
+ }
+
+ if (line[0] == 'q') {
+ global.quit_flag = PJ_TRUE;
+ } else if (line[0] == 'd') {
+ pj_bool_t detail = (line[1] == 'd');
+ pjsip_endpt_dump(global.endpt, detail);
+#if STATEFUL
+ pjsip_tsx_layer_dump(detail);
+#endif
+ }
+ }
+
+ pj_thread_join(global.thread);
+
+#else
+ puts("\nPress Ctrl-C to quit\n");
+ for (;;) {
+ pj_time_val delay = {0, 0};
+ pjsip_endpt_handle_events(global.endpt, &delay);
+ }
+#endif
+
+ destroy_stack();
+
+ return 0;
+}
+
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