| /* $Id$ */ |
| /* |
| * 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; |
| } |
| |