asterisk/utils/streamplayer.c

129 lines
3.5 KiB
C

/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Russell Bryant <russell@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*!
* \file
* \author Russell Bryant <russell@digium.com>
*
* \brief A utility for reading from a raw TCP stream
*
* This application is intended for use when a raw TCP stream is desired to be
* used as a music on hold source for Asterisk. Some devices are capable of
* taking some kind of audio input and provide it as a raw TCP stream over the
* network, which is what inspired someone to fund this to be written.
* However, it would certainly be possible to write your own server application
* to provide music over a TCP stream from a centralized location.
*
* This application is quite simple. It just reads the data from the TCP
* stream and dumps it straight to stdout. Due to the way Asterisk handles
* music on hold sources, this application checks to make sure writing
* to stdout will not be a blocking operation before doing so. If so, the data
* is just thrown away. This ensures that the stream will continue to be
* serviced, even if Asterisk is not currently using the source.
*
* \todo Update this application to be able to connect to a stream via HTTP,
* since that is the #1 most requested feature, and it would be quite useful.
* A lot of people think that is what this is for and email me when it does
* not work. :)
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__Darwin__) || defined(__CYGWIN__) || defined(__DragonFly__)
#include <netinet/in.h>
#endif
#include <sys/time.h>
int main(int argc, char *argv[])
{
struct sockaddr_in sin;
struct hostent *hp;
int s;
int res;
char buf[2048];
fd_set wfds;
struct timeval tv;
if (argc != 3) {
fprintf(stderr, "streamplayer -- A utility for reading from a raw TCP stream.\n");
fprintf(stderr, "Written for use with Asterisk (http://www.asterisk.org)\n");
fprintf(stderr, "Copyright (C) 2005 -- Russell Bryant -- Digium, Inc.\n\n");
fprintf(stderr, "Usage: ./streamplayer <ip> <port>\n");
exit(1);
}
hp = gethostbyname(argv[1]);
if (!hp) {
fprintf(stderr, "Unable to lookup IP for host '%s'\n", argv[1]);
exit(1);
}
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(atoi(argv[2]));
memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0) {
fprintf(stderr, "Unable to allocate socket!\n");
exit(1);
}
res = connect(s, (struct sockaddr *)&sin, sizeof(sin));
if (res) {
fprintf(stderr, "Unable to connect to host!\n");
close(s);
exit(1);
}
while (1) {
res = read(s, buf, sizeof(buf));
if (res < 1)
break;
memset(&tv, 0, sizeof(tv));
FD_ZERO(&wfds);
FD_SET(1, &wfds);
select(2, NULL, &wfds, NULL, &tv);
if (FD_ISSET(1, &wfds)) {
if (write(1, buf, res) < 1) {
break;
}
}
}
close(s);
exit(res);
}