diff options
Diffstat (limited to 'openbsc/src/mgcp/mgcp_main.c')
| -rw-r--r-- | openbsc/src/mgcp/mgcp_main.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/openbsc/src/mgcp/mgcp_main.c b/openbsc/src/mgcp/mgcp_main.c new file mode 100644 index 000000000..cea0ba427 --- /dev/null +++ b/openbsc/src/mgcp/mgcp_main.c @@ -0,0 +1,216 @@ +/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ +/* The main method to drive it as a standalone process */ + +/* + * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> + * (C) 2009 by On-Waves + * All Rights Reserved + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <limits.h> +#include <unistd.h> + +#include <sys/socket.h> + +#include <openbsc/debug.h> +#include <osmocore/msgb.h> +#include <osmocore/talloc.h> +#include <openbsc/gsm_data.h> +#include <osmocore/select.h> +#include <openbsc/mgcp.h> +#include <openbsc/telnet_interface.h> + +/* this is here for the vty... it will never be called */ +void subscr_put() { abort(); } + +#define _GNU_SOURCE +#include <getopt.h> + +#warning "Make use of the rtp proxy code" + +static struct bsc_fd bfd; +static int first_request = 1; +static struct mgcp_config *cfg; + +static char *config_file = "mgcp.cfg"; + +/* used by msgb and mgcp */ +void *tall_bsc_ctx = NULL; + +static void print_help() +{ + printf("Some useful help...\n"); + printf(" -h --help is printing this text.\n"); + printf(" -c --config-file filename The config file to use.\n"); +} + +static void handle_options(int argc, char** argv) +{ + while (1) { + int option_index = 0, c; + static struct option long_options[] = { + {"help", 0, 0, 'h'}, + {"config-file", 1, 0, 'c'}, + {0, 0, 0, 0}, + }; + + c = getopt_long(argc, argv, "hc:", long_options, &option_index); + + if (c == -1) + break; + + switch(c) { + case 'h': + print_help(); + exit(0); + break; + case 'c': + config_file = talloc_strdup(tall_bsc_ctx, optarg); + break; + default: + /* ignore */ + break; + }; + } +} + +static int read_call_agent(struct bsc_fd *fd, unsigned int what) +{ + struct sockaddr_in addr; + socklen_t slen = sizeof(addr); + struct msgb *msg; + struct msgb *resp; + + msg = (struct msgb *) fd->data; + + /* read one less so we can use it as a \0 */ + int rc = recvfrom(bfd.fd, msg->data, msg->data_len - 1, 0, + (struct sockaddr *) &addr, &slen); + if (rc < 0) { + perror("Gateway failed to read"); + return -1; + } else if (slen > sizeof(addr)) { + fprintf(stderr, "Gateway received message from outerspace: %d %d\n", + slen, sizeof(addr)); + return -1; + } + + if (first_request) { + first_request = 0; + resp = mgcp_create_rsip(); + + if (resp) { + sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, + (struct sockaddr *) &addr, sizeof(addr)); + msgb_free(resp); + } + return 0; + } + + /* handle message now */ + msg->l2h = msgb_put(msg, rc); + resp = mgcp_handle_message(cfg, msg); + msgb_reset(msg); + + if (resp) { + sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, (struct sockaddr *) &addr, sizeof(addr)); + msgb_free(resp); + } + return 0; +} + + +int main(int argc, char** argv) +{ + struct gsm_network dummy_network; + struct sockaddr_in addr; + int on = 1, rc; + struct debug_target *stderr_target; + + tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent"); + + debug_init(); + stderr_target = debug_target_create_stderr(); + debug_add_target(stderr_target); + debug_set_all_filter(stderr_target, 1); + + cfg = mgcp_config_alloc(); + if (!cfg) + return -1; + + handle_options(argc, argv); + + telnet_init(&dummy_network, 4243); + rc = mgcp_parse_config(config_file, cfg); + if (rc < 0) + return rc; + + + /* we need to bind a socket */ + if (rc == 0) { + bfd.when = BSC_FD_READ; + bfd.cb = read_call_agent; + bfd.fd = socket(AF_INET, SOCK_DGRAM, 0); + if (bfd.fd < 0) { + perror("Gateway failed to listen"); + return -1; + } + + setsockopt(bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); + + memset(&addr, 0, sizeof(addr)); + addr.sin_family = AF_INET; + addr.sin_port = htons(cfg->source_port); + inet_aton(cfg->source_addr, &addr.sin_addr); + + if (bind(bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { + perror("Gateway failed to bind"); + return -1; + } + + bfd.data = msgb_alloc(4096, "mgcp-msg"); + if (!bfd.data) { + fprintf(stderr, "Gateway memory error.\n"); + return -1; + } + + + if (bsc_register_fd(&bfd) != 0) { + DEBUGP(DMGCP, "Failed to register the fd\n"); + return -1; + } + + DEBUGP(DMGCP, "Configured for MGCP.\n"); + } + + /* initialisation */ + srand(time(NULL)); + + /* main loop */ + while (1) { + bsc_select_main(0); + } + + + return 0; +} |