network.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

/*
 * Network layer for MPlayer
 * by Bertrand BAUDET <[e-mail]>
 * (C) 2001, MPlayer team.
 */

//#define DUMP2FILE

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <errno.h>
#include <ctype.h>

#include "config.h"

#ifndef HAVE_WINSOCK2
#define closesocket close
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif

#include "stream.h"
#include "demuxer.h"
#include "../m_config.h"

#include "network.h"
#include "http.h"
#include "cookies.h"
#include "url.h"
#include "asf.h"
#include "rtp.h"
#include "pnm.h"
#include "realrtsp/rtsp_session.h"

#include "../version.h"

extern int verbose;
extern int stream_cache_size;

extern int mp_input_check_interrupt(int time);

int asf_streaming_start( stream_t *stream, int *demuxer_type );
int rtsp_streaming_start( stream_t *stream );

/* Variables for the command line option -user, -passwd, -bandwidth,
   -user-agent and -nocookies */

char *network_username=NULL;
char *network_password=NULL;
int   network_bandwidth=0;
int   network_cookies_enabled = 0;
char *network_useragent=NULL;

/* IPv6 options */
int   network_prefer_ipv4 = 0;
int   network_ipv4_only_proxy = 0;


static struct {
	char *mime_type;
	int demuxer_type;
} mime_type_table[] = {
	// MP3 streaming, some MP3 streaming server answer with audio/mpeg
	{ "audio/mpeg", DEMUXER_TYPE_AUDIO },
	// MPEG streaming
	{ "video/mpeg", DEMUXER_TYPE_UNKNOWN },
	{ "video/x-mpeg", DEMUXER_TYPE_UNKNOWN },
	{ "video/x-mpeg2", DEMUXER_TYPE_UNKNOWN },
	// AVI ??? => video/x-msvideo
	{ "video/x-msvideo", DEMUXER_TYPE_AVI },
	// MOV => video/quicktime
	{ "video/quicktime", DEMUXER_TYPE_MOV },
	// ASF
        { "audio/x-ms-wax", DEMUXER_TYPE_ASF },
	{ "audio/x-ms-wma", DEMUXER_TYPE_ASF },
	{ "video/x-ms-asf", DEMUXER_TYPE_ASF },
	{ "video/x-ms-afs", DEMUXER_TYPE_ASF },
	{ "video/x-ms-wvx", DEMUXER_TYPE_ASF },
	{ "video/x-ms-wmv", DEMUXER_TYPE_ASF },
	{ "video/x-ms-wma", DEMUXER_TYPE_ASF },
	// Playlists
	{ "video/x-ms-wmx", DEMUXER_TYPE_PLAYLIST },
	{ "audio/x-scpls", DEMUXER_TYPE_PLAYLIST },
	{ "audio/x-mpegurl", DEMUXER_TYPE_PLAYLIST },
	{ "audio/x-pls", DEMUXER_TYPE_PLAYLIST },
	// Real Media
	{ "audio/x-pn-realaudio", DEMUXER_TYPE_REAL },
	// OGG Streaming
	{ "application/x-ogg", DEMUXER_TYPE_OGG },
	// NullSoft Streaming Video
	{ "video/nsv", DEMUXER_TYPE_NSV},
	{ "misc/ultravox", DEMUXER_TYPE_NSV}

};

/*
 * An autodetection based on the extension is not a good idea.
 * 
static struct {
	char *extension;
	int demuxer_type;
} extensions_table[] = {
	{ "mpeg", DEMUXER_TYPE_MPEG_PS },
	{ "mpg", DEMUXER_TYPE_MPEG_PS },
	{ "mpe", DEMUXER_TYPE_MPEG_ES },
	{ "avi", DEMUXER_TYPE_AVI },
	{ "mov", DEMUXER_TYPE_MOV },
	{ "qt", DEMUXER_TYPE_MOV },
	{ "asx", DEMUXER_TYPE_ASF },
	{ "asf", DEMUXER_TYPE_ASF },
	{ "wmv", DEMUXER_TYPE_ASF },
	{ "wma", DEMUXER_TYPE_ASF },
	{ "viv", DEMUXER_TYPE_VIVO },
	{ "rm", DEMUXER_TYPE_REAL },
	{ "ra", DEMUXER_TYPE_REAL },
	{ "y4m", DEMUXER_TYPE_Y4M },
	{ "mp3", DEMUXER_TYPE_AUDIO },
	{ "ogg", DEMUXER_TYPE_OGG },
	{ "wav", DEMUXER_TYPE_AUDIO },
	{ "pls", DEMUXER_TYPE_PLAYLIST },
	{ "m3u", DEMUXER_TYPE_PLAYLIST }
};
*/

streaming_ctrl_t *
streaming_ctrl_new( ) {
	streaming_ctrl_t *streaming_ctrl;
	streaming_ctrl = (streaming_ctrl_t*)malloc(sizeof(streaming_ctrl_t));
	if( streaming_ctrl==NULL ) {
		mp_msg(MSGT_NETWORK,MSGL_FATAL,"Failed to allocate memory\n");
		return NULL;
	}
	memset( streaming_ctrl, 0, sizeof(streaming_ctrl_t) );
	return streaming_ctrl;
}

void
streaming_ctrl_free( streaming_ctrl_t *streaming_ctrl ) {
	if( streaming_ctrl==NULL ) return;
	if( streaming_ctrl->url ) url_free( streaming_ctrl->url );
	if( streaming_ctrl->buffer ) free( streaming_ctrl->buffer );
	if( streaming_ctrl->data ) free( streaming_ctrl->data );
	free( streaming_ctrl );
}

int
read_rtp_from_server(int fd, char *buffer, int length) {
	struct rtpheader rh;
	char *data;
	int len;
	static int got_first = 0;
	static unsigned short sequence;

	if( buffer==NULL || length<0 ) return -1;

	getrtp2(fd, &rh, &data, &len);
	if( got_first && rh.b.sequence != (unsigned short)(sequence+1) )
		mp_msg(MSGT_NETWORK,MSGL_ERR,"RTP packet sequence error!  Expected: %d, received: %d\n", 
			sequence+1, rh.b.sequence);
	got_first = 1;
	sequence = rh.b.sequence;
	memcpy(buffer, data, len);
	return(len);
}


// Converts an address family constant to a string

char *af2String(int af) {
	switch (af) {
		case AF_INET:	return "AF_INET";
		
#ifdef HAVE_AF_INET6
		case AF_INET6:	return "AF_INET6";
#endif
		default:	return "Unknown address family!";
	}
}



// Connect to a server using a TCP connection, with specified address family
// return -2 for fatal error, like unable to resolve name, connection timeout...
// return -1 is unable to connect to a particular port

int
connect2Server_with_af(char *host, int port, int af,int verb) {
	int socket_server_fd;
	int err, err_len;
	int ret,count = 0;
	fd_set set;
	struct timeval tv;
	union {
		struct sockaddr_in four;
#ifdef HAVE_AF_INET6
		struct sockaddr_in6 six;
#endif
	} server_address;
	size_t server_address_size;
	void *our_s_addr;	// Pointer to sin_addr or sin6_addr
	struct hostent *hp=NULL;
	char buf[255];
	
#ifdef HAVE_WINSOCK2
	u_long val;
#endif
	
	socket_server_fd = socket(af, SOCK_STREAM, 0);
	
	
	if( socket_server_fd==-1 ) {
//		mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to create %s socket:\n", af2String(af));
		return -2;
	}

	switch (af) {
		case AF_INET:  our_s_addr = (void *) &server_address.four.sin_addr; break;
#ifdef HAVE_AF_INET6
		case AF_INET6: our_s_addr = (void *) &server_address.six.sin6_addr; break;
#endif
		default:
			mp_msg(MSGT_NETWORK,MSGL_ERR, "Unknown address family %d:\n", af);
			return -2;
	}
	
	
	memset(&server_address, 0, sizeof(server_address));
	
#ifndef HAVE_WINSOCK2
#ifdef USE_ATON
	if (inet_aton(host, our_s_addr)!=1)
#else
	if (inet_pton(af, host, our_s_addr)!=1)
#endif
#else
	if ( inet_addr(host)==INADDR_NONE )
#endif
	{
		if(verb) mp_msg(MSGT_NETWORK,MSGL_STATUS,"Resolving %s for %s...\n", host, af2String(af));
		
#ifdef HAVE_GETHOSTBYNAME2
		hp=(struct hostent*)gethostbyname2( host, af );
#else
		hp=(struct hostent*)gethostbyname( host );
#endif
		if( hp==NULL ) {
			if(verb) mp_msg(MSGT_NETWORK,MSGL_ERR,"Couldn't resolve name for %s: %s\n", af2String(af), host);
			return -2;
		}
		
		memcpy( our_s_addr, (void*)hp->h_addr, hp->h_length );
	}
#ifdef HAVE_WINSOCK2
	else {
		unsigned long addr = inet_addr(host);
		memcpy( our_s_addr, (void*)&addr, sizeof(addr) );
	}
#endif
	
	switch (af) {
		case AF_INET:
			server_address.four.sin_family=af;
			server_address.four.sin_port=htons(port);			
			server_address_size = sizeof(server_address.four);
			break;
#ifdef HAVE_AF_INET6		
		case AF_INET6:
			server_address.six.sin6_family=af;
			server_address.six.sin6_port=htons(port);
			server_address_size = sizeof(server_address.six);
			break;
#endif
		default:
			mp_msg(MSGT_NETWORK,MSGL_ERR, "Unknown address family %d:\n", af);
			return -2;
	}

#if defined(USE_ATON) || defined(HAVE_WINSOCK2)
	strncpy( buf, inet_ntoa( *((struct in_addr*)our_s_addr) ), 255);
#else
	inet_ntop(af, our_s_addr, buf, 255);
#endif
	if(verb) mp_msg(MSGT_NETWORK,MSGL_STATUS,"Connecting to server %s[%s]:%d ...\n", host, buf , port );

	// Turn the socket as non blocking so we can timeout on the connection
#ifndef HAVE_WINSOCK2
	fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) | O_NONBLOCK );
#else
	val = 1;
	ioctlsocket( socket_server_fd, FIONBIO, &val );
#endif
	if( connect( socket_server_fd, (struct sockaddr*)&server_address, server_address_size )==-1 ) {
#ifndef HAVE_WINSOCK2
		if( errno!=EINPROGRESS ) {
#else
		if( (WSAGetLastError() != WSAEINPROGRESS) && (WSAGetLastError() != WSAEWOULDBLOCK) ) {
#endif
			if(verb) mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to connect to server with %s\n", af2String(af));
			closesocket(socket_server_fd);
			return -1;
		}
	}
	tv.tv_sec = 0;
	tv.tv_usec = 500000;
	FD_ZERO( &set );
	FD_SET( socket_server_fd, &set );
	// When the connection will be made, we will have a writable fd
	while((ret = select(socket_server_fd+1, NULL, &set, NULL, &tv)) == 0) {
	      if( ret<0 ) mp_msg(MSGT_NETWORK,MSGL_ERR,"select failed\n");
	      else if(ret > 0) break;
	      else if(count > 30 || mp_input_check_interrupt(500)) {
		if(count > 30)
		  mp_msg(MSGT_NETWORK,MSGL_ERR,"Connection timeout\n");
		else
		  mp_msg(MSGT_NETWORK,MSGL_V,"Connection interuppted by user\n");
		return -3;
	      }
	      count++;
	      FD_ZERO( &set );
	      FD_SET( socket_server_fd, &set );
	      tv.tv_sec = 0;
	      tv.tv_usec = 500000;
	}

	// Turn back the socket as blocking
#ifndef HAVE_WINSOCK2
	fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) & ~O_NONBLOCK );
#else
	val = 0;
	ioctlsocket( socket_server_fd, FIONBIO, &val );
#endif
	// Check if there were any error
	err_len = sizeof(int);
	ret =  getsockopt(socket_server_fd,SOL_SOCKET,SO_ERROR,&err,&err_len);
	if(ret < 0) {
		mp_msg(MSGT_NETWORK,MSGL_ERR,"getsockopt failed : %s\n",strerror(errno));
		return -2;
	}
	if(err > 0) {
		mp_msg(MSGT_NETWORK,MSGL_ERR,"Connect error : %s\n",strerror(err));
		return -1;
	}
	
	return socket_server_fd;
}

// Connect to a server using a TCP connection
// return -2 for fatal error, like unable to resolve name, connection timeout...
// return -1 is unable to connect to a particular port


int
connect2Server(char *host, int  port, int verb) {
#ifdef HAVE_AF_INET6
	int r;
	int s = -2;

	r = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET:AF_INET6,verb);	
	if (r > -1) return r;

	s = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET6:AF_INET,verb);
	if (s == -2) return r;
	return s;
#else	
	return connect2Server_with_af(host, port, AF_INET,verb);
#endif

	
}

URL_t*
check4proxies( URL_t *url ) {
	URL_t *url_out = NULL;
	if( url==NULL ) return NULL;
	url_out = url_new( url->url );
	if( !strcasecmp(url->protocol, "http_proxy") ) {
		mp_msg(MSGT_NETWORK,MSGL_V,"Using HTTP proxy: http://%s:%d\n", url->hostname, url->port );
		return url_out;
	}
	// Check if the http_proxy environment variable is set.
	if( !strcasecmp(url->protocol, "http") ) {
		char *proxy;
		proxy = getenv("http_proxy");
		if( proxy!=NULL ) {
			// We got a proxy, build the URL to use it
			int len;
			char *new_url;
			URL_t *tmp_url;
			URL_t *proxy_url = url_new( proxy );

			if( proxy_url==NULL ) {
				mp_msg(MSGT_NETWORK,MSGL_WARN,"Invalid proxy setting...Trying without proxy.\n");
				return url_out;
			}
			
#ifdef HAVE_AF_INET6
			if (network_ipv4_only_proxy && (gethostbyname(url->hostname)==NULL)) {
				mp_msg(MSGT_NETWORK,MSGL_WARN,
					"Could not find resolve remote hostname for AF_INET. Trying without proxy.\n");
				return url_out;
			}
#endif

			mp_msg(MSGT_NETWORK,MSGL_V,"Using HTTP proxy: %s\n", proxy_url->url );
			len = strlen( proxy_url->hostname ) + strlen( url->url ) + 20;	// 20 = http_proxy:// + port
			new_url = malloc( len+1 );
			if( new_url==NULL ) {
				mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
				return url_out;
			}
			sprintf(new_url, "http_proxy://%s:%d/%s", proxy_url->hostname, proxy_url->port, url->url );
			tmp_url = url_new( new_url );
			if( tmp_url==NULL ) {
				return url_out;
			}
			url_free( url_out );
			url_out = tmp_url;
			free( new_url );
			url_free( proxy_url );
		}
	}
	return url_out;
}

int
http_send_request( URL_t *url, off_t pos ) {
	HTTP_header_t *http_hdr;
	URL_t *server_url;
	char str[256];
	int fd;
	int ret;
	int proxy = 0;		// Boolean

	http_hdr = http_new_header();

	if( !strcasecmp(url->protocol, "http_proxy") ) {
		proxy = 1;
		server_url = url_new( (url->file)+1 );
		http_set_uri( http_hdr, server_url->url );
	} else {
		server_url = url;
		http_set_uri( http_hdr, server_url->file );
	}
	if (server_url->port && server_url->port != 80)
	    snprintf(str, 256, "Host: %s:%d", server_url->hostname, server_url->port );
	else
	    snprintf(str, 256, "Host: %s", server_url->hostname );
	http_set_field( http_hdr, str);
	if (network_useragent)
	{
	    snprintf(str, 256, "User-Agent: %s", network_useragent);
	    http_set_field(http_hdr, str);
	}
	else