diff options
author | Harald Welte <laforge@gnumonks.org> | 2011-03-04 13:18:30 +0100 |
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committer | Harald Welte <laforge@gnumonks.org> | 2011-03-04 13:23:09 +0100 |
commit | 89579b4317a7f7ab6ee706399bee4b8f25a12c3a (patch) | |
tree | 8e66e64f14e582cd29f6b78023528297b71548ba /openbsc/src/mgcp/mgcp_network.c | |
parent | 5a6b68f4169c0ef55dca02a9644ee8f3bbc97e60 (diff) |
prefix sub-directories containing libraries with 'lib'
... and make sure tests work again after restructuring
Diffstat (limited to 'openbsc/src/mgcp/mgcp_network.c')
-rw-r--r-- | openbsc/src/mgcp/mgcp_network.c | 579 |
1 files changed, 0 insertions, 579 deletions
diff --git a/openbsc/src/mgcp/mgcp_network.c b/openbsc/src/mgcp/mgcp_network.c deleted file mode 100644 index 51c08d151..000000000 --- a/openbsc/src/mgcp/mgcp_network.c +++ /dev/null @@ -1,579 +0,0 @@ -/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ -/* The protocol implementation */ - -/* - * (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org> - * (C) 2009-2011 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 Affero General Public License as published by - * the Free Software Foundation; either version 3 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <string.h> -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> - -#include <sys/socket.h> -#include <arpa/inet.h> - -#include <osmocore/msgb.h> -#include <osmocore/select.h> - -#include <openbsc/debug.h> -#include <openbsc/mgcp.h> -#include <openbsc/mgcp_internal.h> - -#warning "Make use of the rtp proxy code" - -/* attempt to determine byte order */ -#include <sys/types.h> -#include <sys/param.h> -#include <limits.h> - -#ifndef __BYTE_ORDER -#error "__BYTE_ORDER should be defined by someone" -#endif - -/* according to rtp_proxy.c RFC 3550 */ -struct rtp_hdr { -#if __BYTE_ORDER == __LITTLE_ENDIAN - uint8_t csrc_count:4, - extension:1, - padding:1, - version:2; - uint8_t payload_type:7, - marker:1; -#elif __BYTE_ORDER == __BIG_ENDIAN - uint8_t version:2, - padding:1, - extension:1, - csrc_count:4; - uint8_t marker:1, - payload_type:7; -#endif - uint16_t sequence; - uint32_t timestamp; - uint32_t ssrc; -} __attribute__((packed)); - - -enum { - DEST_NETWORK = 0, - DEST_BTS = 1, -}; - -enum { - PROTO_RTP, - PROTO_RTCP, -}; - -#define DUMMY_LOAD 0x23 - - -static int udp_send(int fd, struct in_addr *addr, int port, char *buf, int len) -{ - struct sockaddr_in out; - out.sin_family = AF_INET; - out.sin_port = port; - memcpy(&out.sin_addr, addr, sizeof(*addr)); - - return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out)); -} - -int mgcp_send_dummy(struct mgcp_endpoint *endp) -{ - static char buf[] = { DUMMY_LOAD }; - - return udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, - endp->net_end.rtp_port, buf, 1); -} - -static void patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state, - int payload, struct sockaddr_in *addr, char *data, int len) -{ - uint16_t seq; - uint32_t timestamp; - struct rtp_hdr *rtp_hdr; - - if (len < sizeof(*rtp_hdr)) - return; - - rtp_hdr = (struct rtp_hdr *) data; - seq = ntohs(rtp_hdr->sequence); - timestamp = ntohl(rtp_hdr->timestamp); - - if (!state->initialized) { - state->seq_no = seq - 1; - state->ssrc = state->orig_ssrc = rtp_hdr->ssrc; - state->initialized = 1; - state->last_timestamp = timestamp; - } else if (state->ssrc != rtp_hdr->ssrc) { - state->ssrc = rtp_hdr->ssrc; - state->seq_offset = (state->seq_no + 1) - seq; - state->timestamp_offset = state->last_timestamp - timestamp; - state->patch = endp->allow_patch; - LOGP(DMGCP, LOGL_NOTICE, - "The SSRC changed on 0x%x SSRC: %u offset: %d from %s:%d in %d\n", - ENDPOINT_NUMBER(endp), state->ssrc, state->seq_offset, - inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), endp->conn_mode); - } - - /* apply the offset and store it back to the packet */ - if (state->patch) { - seq += state->seq_offset; - rtp_hdr->sequence = htons(seq); - rtp_hdr->ssrc = state->orig_ssrc; - - timestamp += state->timestamp_offset; - rtp_hdr->timestamp = htonl(timestamp); - } - - /* seq changed, now compare if we have lost something */ - if (state->seq_no + 1u != seq) - state->lost_no = abs(seq - (state->seq_no + 1)); - state->seq_no = seq; - - state->last_timestamp = timestamp; - - if (payload < 0) - return; - - rtp_hdr->payload_type = payload; -} - -/* - * The below code is for dispatching. We have a dedicated port for - * the data coming from the net and one to discover the BTS. - */ -static int forward_data(int fd, struct mgcp_rtp_tap *tap, const char *buf, int len) -{ - if (!tap->enabled) - return 0; - - return sendto(fd, buf, len, 0, - (struct sockaddr *)&tap->forward, sizeof(tap->forward)); -} - -static int send_transcoder(struct mgcp_rtp_end *end, struct mgcp_config *cfg, - int is_rtp, const char *buf, int len) -{ - int rc; - int port; - struct sockaddr_in addr; - - port = is_rtp ? end->rtp_port : end->rtcp_port; - - addr.sin_family = AF_INET; - addr.sin_addr = cfg->transcoder_in; - addr.sin_port = port; - - rc = sendto(is_rtp ? - end->rtp.fd : - end->rtcp.fd, buf, len, 0, - (struct sockaddr *) &addr, sizeof(addr)); - - if (rc != len) - LOGP(DMGCP, LOGL_ERROR, - "Failed to send data to the transcoder: %s\n", - strerror(errno)); - - return rc; -} - -static int send_to(struct mgcp_endpoint *endp, int dest, int is_rtp, - struct sockaddr_in *addr, char *buf, int rc) -{ - struct mgcp_trunk_config *tcfg = endp->tcfg; - /* For loop toggle the destination and then dispatch. */ - if (tcfg->audio_loop) - dest = !dest; - - /* Loop based on the conn_mode, maybe undoing the above */ - if (endp->conn_mode == MGCP_CONN_LOOPBACK) - dest = !dest; - - if (dest == DEST_NETWORK) { - if (is_rtp) { - patch_and_count(endp, &endp->bts_state, - endp->net_end.payload_type, - addr, buf, rc); - forward_data(endp->net_end.rtp.fd, - &endp->taps[MGCP_TAP_NET_OUT], buf, rc); - return udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, - endp->net_end.rtp_port, buf, rc); - } else { - return udp_send(endp->net_end.rtcp.fd, &endp->net_end.addr, - endp->net_end.rtcp_port, buf, rc); - } - } else { - if (is_rtp) { - patch_and_count(endp, &endp->net_state, - endp->bts_end.payload_type, - addr, buf, rc); - forward_data(endp->bts_end.rtp.fd, - &endp->taps[MGCP_TAP_BTS_OUT], buf, rc); - return udp_send(endp->bts_end.rtp.fd, &endp->bts_end.addr, - endp->bts_end.rtp_port, buf, rc); - } else { - return udp_send(endp->bts_end.rtcp.fd, &endp->bts_end.addr, - endp->bts_end.rtcp_port, buf, rc); - } - } -} - -static int recevice_from(struct mgcp_endpoint *endp, int fd, struct sockaddr_in *addr, - char *buf, int bufsize) -{ - int rc; - socklen_t slen = sizeof(*addr); - - rc = recvfrom(fd, buf, bufsize, 0, - (struct sockaddr *) addr, &slen); - if (rc < 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to receive message on: 0x%x errno: %d/%s\n", - ENDPOINT_NUMBER(endp), errno, strerror(errno)); - return -1; - } - - /* do not forward aynthing... maybe there is a packet from the bts */ - if (!endp->allocated) - return -1; - - #warning "Slight spec violation. With connection mode recvonly we should attempt to forward." - - return rc; -} - -static int rtp_data_net(struct bsc_fd *fd, unsigned int what) -{ - char buf[4096]; - struct sockaddr_in addr; - struct mgcp_endpoint *endp; - int rc, proto; - - endp = (struct mgcp_endpoint *) fd->data; - - rc = recevice_from(endp, fd->fd, &addr, buf, sizeof(buf)); - if (rc <= 0) - return -1; - - if (memcmp(&addr.sin_addr, &endp->net_end.addr, sizeof(addr.sin_addr)) != 0) { - LOGP(DMGCP, LOGL_ERROR, - "Data from wrong address %s on 0x%x\n", - inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); - return -1; - } - - if (endp->net_end.rtp_port != addr.sin_port && - endp->net_end.rtcp_port != addr.sin_port) { - LOGP(DMGCP, LOGL_ERROR, - "Data from wrong source port %d on 0x%x\n", - ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); - return -1; - } - - /* throw away the dummy message */ - if (rc == 1 && buf[0] == DUMMY_LOAD) { - LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from network on 0x%x\n", - ENDPOINT_NUMBER(endp)); - return 0; - } - - proto = fd == &endp->net_end.rtp ? PROTO_RTP : PROTO_RTCP; - endp->net_end.packets += 1; - - forward_data(fd->fd, &endp->taps[MGCP_TAP_NET_IN], buf, rc); - if (endp->is_transcoded) - return send_transcoder(&endp->trans_net, endp->cfg, proto == PROTO_RTP, &buf[0], rc); - else - return send_to(endp, DEST_BTS, proto == PROTO_RTP, &addr, &buf[0], rc); -} - -static void discover_bts(struct mgcp_endpoint *endp, int proto, struct sockaddr_in *addr) -{ - struct mgcp_config *cfg = endp->cfg; - - if (proto == PROTO_RTP && endp->bts_end.rtp_port == 0) { - if (!cfg->bts_ip || - memcmp(&addr->sin_addr, - &cfg->bts_in, sizeof(cfg->bts_in)) == 0 || - memcmp(&addr->sin_addr, - &endp->bts_end.addr, sizeof(endp->bts_end.addr)) == 0) { - - endp->bts_end.rtp_port = addr->sin_port; - endp->bts_end.addr = addr->sin_addr; - - LOGP(DMGCP, LOGL_NOTICE, - "Found BTS for endpoint: 0x%x on port: %d/%d of %s\n", - ENDPOINT_NUMBER(endp), ntohs(endp->bts_end.rtp_port), - ntohs(endp->bts_end.rtcp_port), inet_ntoa(addr->sin_addr)); - } - } else if (proto == PROTO_RTCP && endp->bts_end.rtcp_port == 0) { - if (memcmp(&endp->bts_end.addr, &addr->sin_addr, - sizeof(endp->bts_end.addr)) == 0) { - endp->bts_end.rtcp_port = addr->sin_port; - } - } -} - -static int rtp_data_bts(struct bsc_fd *fd, unsigned int what) -{ - char buf[4096]; - struct sockaddr_in addr; - struct mgcp_endpoint *endp; - struct mgcp_config *cfg; - int rc, proto; - - endp = (struct mgcp_endpoint *) fd->data; - cfg = endp->cfg; - - rc = recevice_from(endp, fd->fd, &addr, buf, sizeof(buf)); - if (rc <= 0) - return -1; - - proto = fd == &endp->bts_end.rtp ? PROTO_RTP : PROTO_RTCP; - - /* We have no idea who called us, maybe it is the BTS. */ - /* it was the BTS... */ - discover_bts(endp, proto, &addr); - - if (memcmp(&endp->bts_end.addr, &addr.sin_addr, sizeof(addr.sin_addr)) != 0) { - LOGP(DMGCP, LOGL_ERROR, - "Data from wrong bts %s on 0x%x\n", - inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); - return -1; - } - - if (endp->bts_end.rtp_port != addr.sin_port && - endp->bts_end.rtcp_port != addr.sin_port) { - LOGP(DMGCP, LOGL_ERROR, - "Data from wrong bts source port %d on 0x%x\n", - ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); - return -1; - } - - /* throw away the dummy message */ - if (rc == 1 && buf[0] == DUMMY_LOAD) { - LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from bts on 0x%x\n", - ENDPOINT_NUMBER(endp)); - return 0; - } - - /* do this before the loop handling */ - endp->bts_end.packets += 1; - - forward_data(fd->fd, &endp->taps[MGCP_TAP_BTS_IN], buf, rc); - if (endp->is_transcoded) - return send_transcoder(&endp->trans_bts, endp->cfg, proto == PROTO_RTP, &buf[0], rc); - else - return send_to(endp, DEST_NETWORK, proto == PROTO_RTP, &addr, &buf[0], rc); -} - -static int rtp_data_transcoder(struct mgcp_rtp_end *end, struct mgcp_endpoint *_endp, - int dest, struct bsc_fd *fd) -{ - char buf[4096]; - struct sockaddr_in addr; - struct mgcp_config *cfg; - int rc, proto; - - cfg = _endp->cfg; - rc = recevice_from(_endp, fd->fd, &addr, buf, sizeof(buf)); - if (rc <= 0) - return -1; - - proto = fd == &end->rtp ? PROTO_RTP : PROTO_RTCP; - - if (memcmp(&addr.sin_addr, &cfg->transcoder_in, sizeof(addr.sin_addr)) != 0) { - LOGP(DMGCP, LOGL_ERROR, - "Data not coming from transcoder dest: %d %s on 0x%x\n", - dest, inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(_endp)); - return -1; - } - - if (end->rtp_port != addr.sin_port && - end->rtcp_port != addr.sin_port) { - LOGP(DMGCP, LOGL_ERROR, - "Data from wrong transcoder dest %d source port %d on 0x%x\n", - dest, ntohs(addr.sin_port), ENDPOINT_NUMBER(_endp)); - return -1; - } - - /* throw away the dummy message */ - if (rc == 1 && buf[0] == DUMMY_LOAD) { - LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from transcoder dest %d on 0x%x\n", - dest, ENDPOINT_NUMBER(_endp)); - return 0; - } - - end->packets += 1; - return send_to(_endp, dest, proto == PROTO_RTP, &addr, &buf[0], rc); -} - -static int rtp_data_trans_net(struct bsc_fd *fd, unsigned int what) -{ - struct mgcp_endpoint *endp; - endp = (struct mgcp_endpoint *) fd->data; - - return rtp_data_transcoder(&endp->trans_net, endp, DEST_NETWORK, fd); -} - -static int rtp_data_trans_bts(struct bsc_fd *fd, unsigned int what) -{ - struct mgcp_endpoint *endp; - endp = (struct mgcp_endpoint *) fd->data; - - return rtp_data_transcoder(&endp->trans_bts, endp, DEST_BTS, fd); -} - -static int create_bind(const char *source_addr, struct bsc_fd *fd, int port) -{ - struct sockaddr_in addr; - int on = 1; - - fd->fd = socket(AF_INET, SOCK_DGRAM, 0); - if (fd->fd < 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to create UDP port.\n"); - return -1; - } - - setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); - memset(&addr, 0, sizeof(addr)); - addr.sin_family = AF_INET; - addr.sin_port = htons(port); - inet_aton(source_addr, &addr.sin_addr); - - if (bind(fd->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { - close(fd->fd); - fd->fd = -1; - return -1; - } - - return 0; -} - -static int set_ip_tos(int fd, int tos) -{ - int ret; - ret = setsockopt(fd, IPPROTO_IP, IP_TOS, - &tos, sizeof(tos)); - return ret != 0; -} - -static int bind_rtp(struct mgcp_config *cfg, struct mgcp_rtp_end *rtp_end, int endpno) -{ - if (create_bind(cfg->source_addr, &rtp_end->rtp, rtp_end->local_port) != 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to create RTP port: %s:%d on 0x%x\n", - cfg->source_addr, rtp_end->local_port, endpno); - goto cleanup0; - } - - if (create_bind(cfg->source_addr, &rtp_end->rtcp, rtp_end->local_port + 1) != 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to create RTCP port: %s:%d on 0x%x\n", - cfg->source_addr, rtp_end->local_port + 1, endpno); - goto cleanup1; - } - - set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp); - set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp); - - rtp_end->rtp.when = BSC_FD_READ; - if (bsc_register_fd(&rtp_end->rtp) != 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to register RTP port %d on 0x%x\n", - rtp_end->local_port, endpno); - goto cleanup2; - } - - rtp_end->rtcp.when = BSC_FD_READ; - if (bsc_register_fd(&rtp_end->rtcp) != 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to register RTCP port %d on 0x%x\n", - rtp_end->local_port + 1, endpno); - goto cleanup3; - } - - return 0; - -cleanup3: - bsc_unregister_fd(&rtp_end->rtp); -cleanup2: - close(rtp_end->rtcp.fd); - rtp_end->rtcp.fd = -1; -cleanup1: - close(rtp_end->rtp.fd); - rtp_end->rtp.fd = -1; -cleanup0: - return -1; -} - -static int int_bind(const char *port, - struct mgcp_rtp_end *end, int (*cb)(struct bsc_fd *, unsigned), - struct mgcp_endpoint *_endp, int rtp_port) -{ - if (end->rtp.fd != -1 || end->rtcp.fd != -1) { - LOGP(DMGCP, LOGL_ERROR, "Previous %s was still bound on %d\n", - port, ENDPOINT_NUMBER(_endp)); - mgcp_free_rtp_port(end); - } - - end->local_port = rtp_port; - end->rtp.cb = cb; - end->rtp.data = _endp; - end->rtcp.data = _endp; - end->rtcp.cb = cb; - return bind_rtp(_endp->cfg, end, ENDPOINT_NUMBER(_endp)); -} - - -int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) -{ - return int_bind("bts-port", &endp->bts_end, - rtp_data_bts, endp, rtp_port); -} - -int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) -{ - return int_bind("net-port", &endp->net_end, - rtp_data_net, endp, rtp_port); -} - -int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) -{ - return int_bind("trans-net", &endp->trans_net, - rtp_data_trans_net, endp, rtp_port); -} - -int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) -{ - return int_bind("trans-bts", &endp->trans_bts, - rtp_data_trans_bts, endp, rtp_port); -} - -int mgcp_free_rtp_port(struct mgcp_rtp_end *end) -{ - if (end->rtp.fd != -1) { - close(end->rtp.fd); - end->rtp.fd = -1; - bsc_unregister_fd(&end->rtp); - } - - if (end->rtcp.fd != -1) { - close(end->rtcp.fd); - end->rtcp.fd = -1; - bsc_unregister_fd(&end->rtcp); - } - - return 0; -} |