334 lines
9.3 KiB
C
334 lines
9.3 KiB
C
/*
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* m3ua_client.c
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* openzap
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*
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* Created by Shane Burrell on 4/3/08.
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* Copyright 2008 Shane Burrell. All rights reserved.
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*
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*
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* Copyright (c) 2007, Anthony Minessale II, Nenad Corbic
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of the original author; nor the names of any contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#include "openzap.h"
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#include <m3ua_client.h>
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#ifndef HAVE_GETHOSTBYNAME_R
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extern int gethostbyname_r (const char *__name,
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struct hostent *__result_buf,
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char *__buf, size_t __buflen,
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struct hostent **__result,
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int *__h_errnop);
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#endif
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struct m3uac_map {
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uint32_t event_id;
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const char *name;
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};
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static struct m3uac_map m3uac_table[] = {
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{M3UA_EVENT_CALL_START, "CALL_START"},
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{M3UA_EVENT_CALL_START_ACK, "CALL_START_ACK"},
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{M3UA_EVENT_CALL_START_NACK, "CALL_START_NACK"},
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{M3UA_EVENT_CALL_START_NACK_ACK, "CALL_START_NACK_ACK"},
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{M3UA_EVENT_CALL_ANSWERED, "CALL_ANSWERED"},
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{M3UA_EVENT_CALL_STOPPED, "CALL_STOPPED"},
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{M3UA_EVENT_CALL_STOPPED_ACK, "CALL_STOPPED_ACK"},
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{M3UA_EVENT_SYSTEM_RESTART, "SYSTEM_RESTART"},
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{M3UA_EVENT_SYSTEM_RESTART_ACK, "SYSTEM_RESTART_ACK"},
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{M3UA_EVENT_HEARTBEAT, "HEARTBEAT"},
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{M3UA_EVENT_INSERT_CHECK_LOOP, "LOOP START"},
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{M3UA_EVENT_REMOVE_CHECK_LOOP, "LOOP STOP"}
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};
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static int create_conn_socket(m3uac_connection_t *mcon, char *local_ip, int local_port, char *ip, int port)
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{
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int rc;
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struct hostent *result, *local_result;
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char buf[512], local_buf[512];
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int err = 0;
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memset(&mcon->remote_hp, 0, sizeof(mcon->remote_hp));
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memset(&mcon->local_hp, 0, sizeof(mcon->local_hp));
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mcon->socket = socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
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zap_log(ZAP_LOG_DEBUG, "Creating L=%s:%d R=%s:%d\n",
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local_ip,local_port,ip,port);
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if (mcon->socket >= 0) {
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int flag;
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flag = 1;
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gethostbyname_r(ip, &mcon->remote_hp, buf, sizeof(buf), &result, &err);
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gethostbyname_r(local_ip, &mcon->local_hp, local_buf, sizeof(local_buf), &local_result, &err);
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if (result && local_result) {
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mcon->remote_addr.sin_family = mcon->remote_hp.h_addrtype;
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memcpy((char *) &mcon->remote_addr.sin_addr.s_addr, mcon->remote_hp.h_addr_list[0], mcon->remote_hp.h_length);
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mcon->remote_addr.sin_port = htons(port);
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mcon->local_addr.sin_family = mcon->local_hp.h_addrtype;
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memcpy((char *) &mcon->local_addr.sin_addr.s_addr, mcon->local_hp.h_addr_list[0], mcon->local_hp.h_length);
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mcon->local_addr.sin_port = htons(local_port);
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setsockopt(mcon->socket, IPPROTO_SCTP, SCTP_NODELAY, (char *)&flag, sizeof(int));
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rc=listen(mcon->socket,100);
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if (rc) {
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close(mcon->socket);
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mcon->socket = -1;
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}
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}
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}
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zap_mutex_create(&mcon->mutex);
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return mcon->socket;
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}
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int m3uac_connection_close(m3uac_connection_t *mcon)
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{
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if (mcon->socket > -1) {
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close(mcon->socket);
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}
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zap_mutex_lock(mcon->mutex);
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zap_mutex_unlock(mcon->mutex);
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zap_mutex_destroy(&mcon->mutex);
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memset(mcon, 0, sizeof(*mcon));
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mcon->socket = -1;
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return 0;
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}
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int m3uac_connection_open(m3uac_connection_t *mcon, char *local_ip, int local_port, char *ip, int port)
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{
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create_conn_socket(mcon, local_ip, local_port, ip, port);
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return mcon->socket;
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}
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int m3uac_exec_command(m3uac_connection_t *mcon, int span, int chan, int id, int cmd, int cause)
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{
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m3uac_event_t oevent;
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int retry = 5;
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m3uac_event_init(&oevent, cmd, chan, span);
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oevent.release_cause = cause;
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if (cmd == SIGBOOST_EVENT_SYSTEM_RESTART) {
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mcon->rxseq_reset = 1;
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mcon->txseq = 0;
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mcon->rxseq = 0;
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mcon->txwindow = 0;
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}
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if (id >= 0) {
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oevent.call_setup_id = id;
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}
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while (m3uac_connection_write(mcon, &oevent) <= 0) {
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if (--retry <= 0) {
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zap_log(ZAP_LOG_CRIT, "Failed to tx on M3UA socket: %s\n", strerror(errno));
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return -1;
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} else {
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zap_log(ZAP_LOG_WARNING, "Failed to tx on M3UA socket: %s :retry %i\n", strerror(errno), retry);
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zap_sleep(1);
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}
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}
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return 0;
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}
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m3uac_event_t *m3uac_connection_read(m3uac_connection_t *mcon, int iteration)
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{
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unsigned int fromlen = sizeof(struct sockaddr_in);
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int bytes = 0;
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bytes = recvfrom(mcon->socket, &mcon->event, sizeof(mcon->event), MSG_DONTWAIT,
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(struct sockaddr *) &mcon->local_addr, &fromlen);
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if (bytes == sizeof(mcon->event) || bytes == (sizeof(mcon->event)-sizeof(uint32_t))) {
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if (mcon->rxseq_reset) {
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if (mcon->event.event_id == SIGBOOST_EVENT_SYSTEM_RESTART_ACK) {
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zap_log(ZAP_LOG_DEBUG, "Rx sync ok\n");
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mcon->rxseq = mcon->event.fseqno;
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return &mcon->event;
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}
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errno=EAGAIN;
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zap_log(ZAP_LOG_DEBUG, "Waiting for rx sync...\n");
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return NULL;
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}
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mcon->txwindow = mcon->txseq - mcon->event.bseqno;
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mcon->rxseq++;
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if (mcon->rxseq != mcon->event.fseqno) {
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zap_log(ZAP_LOG_CRIT, "Invalid Sequence Number Expect=%i Rx=%i\n", mcon->rxseq, mcon->event.fseqno);
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return NULL;
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}
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return &mcon->event;
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} else {
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if (iteration == 0) {
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zap_log(ZAP_LOG_CRIT, "Invalid Event length from boost rxlen=%i evsz=%i\n", bytes, sizeof(mcon->event));
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return NULL;
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}
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}
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return NULL;
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}
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m3uac_event_t *m3uac_connection_readp(m3uac_connection_t *mcon, int iteration)
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{
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unsigned int fromlen = sizeof(struct sockaddr_in);
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int bytes = 0;
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bytes = recvfrom(mcon->socket, &mcon->event, sizeof(mcon->event), MSG_DONTWAIT, (struct sockaddr *) &mcon->local_addr, &fromlen);
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if (bytes == sizeof(mcon->event) || bytes == (sizeof(mcon->event)-sizeof(uint32_t))) {
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return &mcon->event;
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} else {
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if (iteration == 0) {
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zap_log(ZAP_LOG_CRIT, "Critical Error: PQ Invalid Event lenght from boost rxlen=%i evsz=%i\n", bytes, sizeof(mcon->event));
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return NULL;
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}
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}
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return NULL;
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}
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int m3uac_connection_write(m3uac_connection_t *mcon, ss7bc_event_t *event)
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{
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int err;
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if (!event || mcon->socket < 0 || !mcon->mutex) {
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zap_log(ZAP_LOG_DEBUG, "Critical Error: No Event Device\n");
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return -EINVAL;
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}
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if (event->span > 16 || event->chan > 31) {
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zap_log(ZAP_LOG_CRIT, "Critical Error: TX Cmd=%s Invalid Span=%i Chan=%i\n", m3uac_event_id_name(event->event_id), event->span,event->chan);
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return -1;
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}
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gettimeofday(&event->tv,NULL);
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zap_mutex_lock(mcon->mutex);
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event->fseqno = mcon->txseq++;
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event->bseqno = mcon->rxseq;
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err = sendto(mcon->socket, event, sizeof(m3uac_event_t), 0, (struct sockaddr *) &mcon->remote_addr, sizeof(mcon->remote_addr));
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zap_mutex_unlock(mcon->mutex);
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if (err != sizeof(m3uac_event_t)) {
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err = -1;
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}
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zap_log(ZAP_LOG_DEBUG, "TX EVENT: %s:(%X) [w%dg%d] Rc=%i CSid=%i Seq=%i Cd=[%s] Ci=[%s]\n",
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m3uac_event_id_name(event->event_id),
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event->event_id,
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event->span+1,
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event->chan+1,
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event->release_cause,
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event->call_setup_id,
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event->fseqno,
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(event->called_number_digits_count ? (char *) event->called_number_digits : "N/A"),
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(event->calling_number_digits_count ? (char *) event->calling_number_digits : "N/A")
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);
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return err;
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}
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void m3uac_call_init(m3uac_event_t *event, const char *calling, const char *called, int setup_id)
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{
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memset(event, 0, sizeof(m3uac_event_t));
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event->event_id = M3UA_EVENT_CALL_START;
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if (calling) {
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strncpy((char*)event->calling_number_digits, calling, sizeof(event->calling_number_digits)-1);
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event->calling_number_digits_count = strlen(calling);
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}
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if (called) {
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strncpy((char*)event->called_number_digits, called, sizeof(event->called_number_digits)-1);
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event->called_number_digits_count = strlen(called);
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}
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event->call_setup_id = setup_id;
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}
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void m3uac_event_init(m3uac_event_t *event, m3uac_event_id_t event_id, int chan, int span)
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{
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memset(event, 0, sizeof(ss7bc_event_t));
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event->event_id = event_id;
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event->chan = chan;
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event->span = span;
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}
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const char *m3uac_event_id_name(uint32_t event_id)
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{
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unsigned int x;
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const char *ret = NULL;
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for (x = 0 ; x < sizeof(m3uac_table)/sizeof(struct m3uac_map); x++) {
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if (m3uac_table[x].event_id == event_id) {
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ret = m3uac_table[x].name;
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break;
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}
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}
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return ret;
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}
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/* For Emacs:
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* Local Variables:
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* mode:c
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* indent-tabs-mode:t
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* tab-width:4
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* c-basic-offset:4
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* End:
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* For VIM:
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* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
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*/
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