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/*
* UDP prototype streaming system
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* Copyright ( c ) 2000 , 2001 , 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg .
*
* FFmpeg is free software ; you can redistribute it and / or
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* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
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* version 2.1 of the License , or ( at your option ) any later version .
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*
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* FFmpeg is distributed in the hope that it will be useful ,
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* but WITHOUT ANY WARRANTY ; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg ; if not , write to the Free Software
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* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
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*/
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/**
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* @ file
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* UDP protocol
*/
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# define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
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# include "avformat.h"
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# include "avio_internal.h"
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# include "libavutil/parseutils.h"
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# include "libavutil/fifo.h"
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# include "libavutil/intreadwrite.h"
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# include "libavutil/avstring.h"
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# include "libavutil/opt.h"
# include "libavutil/log.h"
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# include "libavutil/time.h"
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# include "internal.h"
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# include "network.h"
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# include "os_support.h"
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# include "url.h"
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# if HAVE_UDPLITE_H
# include "udplite.h"
# else
/* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
* So , we provide a fallback here .
*/
# define UDPLITE_SEND_CSCOV 10
# define UDPLITE_RECV_CSCOV 11
# endif
# ifndef IPPROTO_UDPLITE
# define IPPROTO_UDPLITE 136
# endif
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# if HAVE_PTHREAD_CANCEL
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# include <pthread.h>
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# endif
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# ifndef HAVE_PTHREAD_CANCEL
# define HAVE_PTHREAD_CANCEL 0
# endif
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# ifndef IPV6_ADD_MEMBERSHIP
# define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
# define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
# endif
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# define UDP_TX_BUF_SIZE 32768
# define UDP_MAX_PKT_SIZE 65536
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# define UDP_HEADER_SIZE 8
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typedef struct UDPContext {
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const AVClass * class ;
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int udp_fd ;
int ttl ;
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int udplite_coverage ;
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int buffer_size ;
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int pkt_size ;
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int is_multicast ;
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int is_broadcast ;
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int local_port ;
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int reuse_socket ;
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int overrun_nonfatal ;
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struct sockaddr_storage dest_addr ;
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int dest_addr_len ;
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int is_connected ;
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/* Circular Buffer variables for use in UDP receive code */
int circular_buffer_size ;
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AVFifoBuffer * fifo ;
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int circular_buffer_error ;
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# if HAVE_PTHREAD_CANCEL
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pthread_t circular_buffer_thread ;
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pthread_mutex_t mutex ;
pthread_cond_t cond ;
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int thread_started ;
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# endif
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uint8_t tmp [ UDP_MAX_PKT_SIZE + 4 ] ;
int remaining_in_dg ;
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char * localaddr ;
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int timeout ;
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struct sockaddr_storage local_addr_storage ;
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char * sources ;
char * block ;
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} UDPContext ;
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# define OFFSET(x) offsetof(UDPContext, x)
# define D AV_OPT_FLAG_DECODING_PARAM
# define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options [ ] = {
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{ " buffer_size " , " System data size (in bytes) " , OFFSET ( buffer_size ) , AV_OPT_TYPE_INT , { . i64 = - 1 } , - 1 , INT_MAX , . flags = D | E } ,
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{ " localport " , " Local port " , OFFSET ( local_port ) , AV_OPT_TYPE_INT , { . i64 = - 1 } , - 1 , INT_MAX , D | E } ,
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{ " local_port " , " Local port " , OFFSET ( local_port ) , AV_OPT_TYPE_INT , { . i64 = - 1 } , - 1 , INT_MAX , . flags = D | E } ,
{ " localaddr " , " Local address " , OFFSET ( localaddr ) , AV_OPT_TYPE_STRING , { . str = NULL } , . flags = D | E } ,
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{ " udplite_coverage " , " choose UDPLite head size which should be validated by checksum " , OFFSET ( udplite_coverage ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , INT_MAX , D | E } ,
{ " pkt_size " , " Maximum UDP packet size " , OFFSET ( pkt_size ) , AV_OPT_TYPE_INT , { . i64 = 1472 } , - 1 , INT_MAX , . flags = D | E } ,
{ " reuse " , " explicitly allow reusing UDP sockets " , OFFSET ( reuse_socket ) , AV_OPT_TYPE_INT , { . i64 = - 1 } , - 1 , 1 , D | E } ,
{ " reuse_socket " , " explicitly allow reusing UDP sockets " , OFFSET ( reuse_socket ) , AV_OPT_TYPE_INT , { . i64 = - 1 } , - 1 , 1 , . flags = D | E } ,
{ " broadcast " , " explicitly allow or disallow broadcast destination " , OFFSET ( is_broadcast ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , 1 , E } ,
{ " ttl " , " Time to live (multicast only) " , OFFSET ( ttl ) , AV_OPT_TYPE_INT , { . i64 = 16 } , 0 , INT_MAX , E } ,
{ " connect " , " set if connect() should be called on socket " , OFFSET ( is_connected ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , 1 , . flags = D | E } ,
{ " fifo_size " , " set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes " , OFFSET ( circular_buffer_size ) , AV_OPT_TYPE_INT , { . i64 = 7 * 4096 } , 0 , INT_MAX , D } ,
{ " overrun_nonfatal " , " survive in case of UDP receiving circular buffer overrun " , OFFSET ( overrun_nonfatal ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , 1 , D } ,
{ " timeout " , " set raise error timeout (only in read mode) " , OFFSET ( timeout ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , INT_MAX , D } ,
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{ " sources " , " Source list " , OFFSET ( sources ) , AV_OPT_TYPE_STRING , { . str = NULL } , . flags = D | E } ,
{ " block " , " Block list " , OFFSET ( block ) , AV_OPT_TYPE_STRING , { . str = NULL } , . flags = D | E } ,
{ NULL }
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} ;
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static const AVClass udp_class = {
. class_name = " udp " ,
. item_name = av_default_item_name ,
. option = options ,
. version = LIBAVUTIL_VERSION_INT ,
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} ;
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static const AVClass udplite_context_class = {
. class_name = " udplite " ,
. item_name = av_default_item_name ,
. option = options ,
. version = LIBAVUTIL_VERSION_INT ,
} ;
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static void log_net_error ( void * ctx , int level , const char * prefix )
{
char errbuf [ 100 ] ;
av_strerror ( ff_neterrno ( ) , errbuf , sizeof ( errbuf ) ) ;
av_log ( ctx , level , " %s: %s \n " , prefix , errbuf ) ;
}
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static int udp_set_multicast_ttl ( int sockfd , int mcastTTL ,
struct sockaddr * addr )
{
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# ifdef IP_MULTICAST_TTL
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if ( addr - > sa_family = = AF_INET ) {
if ( setsockopt ( sockfd , IPPROTO_IP , IP_MULTICAST_TTL , & mcastTTL , sizeof ( mcastTTL ) ) < 0 ) {
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log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IP_MULTICAST_TTL) " ) ;
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return - 1 ;
}
}
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# endif
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# if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
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if ( addr - > sa_family = = AF_INET6 ) {
if ( setsockopt ( sockfd , IPPROTO_IPV6 , IPV6_MULTICAST_HOPS , & mcastTTL , sizeof ( mcastTTL ) ) < 0 ) {
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log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IPV6_MULTICAST_HOPS) " ) ;
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return - 1 ;
}
}
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# endif
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return 0 ;
}
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static int udp_join_multicast_group ( int sockfd , struct sockaddr * addr , struct sockaddr * local_addr )
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{
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# ifdef IP_ADD_MEMBERSHIP
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if ( addr - > sa_family = = AF_INET ) {
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struct ip_mreq mreq ;
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mreq . imr_multiaddr . s_addr = ( ( struct sockaddr_in * ) addr ) - > sin_addr . s_addr ;
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if ( local_addr )
mreq . imr_interface = ( ( struct sockaddr_in * ) local_addr ) - > sin_addr ;
else
mreq . imr_interface . s_addr = INADDR_ANY ;
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if ( setsockopt ( sockfd , IPPROTO_IP , IP_ADD_MEMBERSHIP , ( const void * ) & mreq , sizeof ( mreq ) ) < 0 ) {
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log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IP_ADD_MEMBERSHIP) " ) ;
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return - 1 ;
}
}
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# endif
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# if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
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if ( addr - > sa_family = = AF_INET6 ) {
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struct ipv6_mreq mreq6 ;
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memcpy ( & mreq6 . ipv6mr_multiaddr , & ( ( ( struct sockaddr_in6 * ) addr ) - > sin6_addr ) , sizeof ( struct in6_addr ) ) ;
mreq6 . ipv6mr_interface = 0 ;
if ( setsockopt ( sockfd , IPPROTO_IPV6 , IPV6_ADD_MEMBERSHIP , & mreq6 , sizeof ( mreq6 ) ) < 0 ) {
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log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IPV6_ADD_MEMBERSHIP) " ) ;
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return - 1 ;
}
}
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# endif
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return 0 ;
}
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static int udp_leave_multicast_group ( int sockfd , struct sockaddr * addr , struct sockaddr * local_addr )
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{
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# ifdef IP_DROP_MEMBERSHIP
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if ( addr - > sa_family = = AF_INET ) {
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struct ip_mreq mreq ;
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mreq . imr_multiaddr . s_addr = ( ( struct sockaddr_in * ) addr ) - > sin_addr . s_addr ;
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if ( local_addr )
mreq . imr_interface = ( ( struct sockaddr_in * ) local_addr ) - > sin_addr ;
else
mreq . imr_interface . s_addr = INADDR_ANY ;
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if ( setsockopt ( sockfd , IPPROTO_IP , IP_DROP_MEMBERSHIP , ( const void * ) & mreq , sizeof ( mreq ) ) < 0 ) {
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log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IP_DROP_MEMBERSHIP) " ) ;
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return - 1 ;
}
}
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# endif
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# if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
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if ( addr - > sa_family = = AF_INET6 ) {
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struct ipv6_mreq mreq6 ;
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memcpy ( & mreq6 . ipv6mr_multiaddr , & ( ( ( struct sockaddr_in6 * ) addr ) - > sin6_addr ) , sizeof ( struct in6_addr ) ) ;
mreq6 . ipv6mr_interface = 0 ;
if ( setsockopt ( sockfd , IPPROTO_IPV6 , IPV6_DROP_MEMBERSHIP , & mreq6 , sizeof ( mreq6 ) ) < 0 ) {
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log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IPV6_DROP_MEMBERSHIP) " ) ;
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return - 1 ;
}
}
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# endif
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return 0 ;
}
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static struct addrinfo * udp_resolve_host ( const char * hostname , int port ,
int type , int family , int flags )
{
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struct addrinfo hints = { 0 } , * res = 0 ;
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int error ;
char sport [ 16 ] ;
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const char * node = 0 , * service = " 0 " ;
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if ( port > 0 ) {
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snprintf ( sport , sizeof ( sport ) , " %d " , port ) ;
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service = sport ;
}
if ( ( hostname ) & & ( hostname [ 0 ] ! = ' \0 ' ) & & ( hostname [ 0 ] ! = ' ? ' ) ) {
node = hostname ;
}
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hints . ai_socktype = type ;
hints . ai_family = family ;
hints . ai_flags = flags ;
if ( ( error = getaddrinfo ( node , service , & hints , & res ) ) ) {
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res = NULL ;
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av_log ( NULL , AV_LOG_ERROR , " udp_resolve_host: %s \n " , gai_strerror ( error ) ) ;
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}
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return res ;
}
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static int udp_set_multicast_sources ( int sockfd , struct sockaddr * addr ,
int addr_len , char * * sources ,
int nb_sources , int include )
{
# if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32)
/* These ones are available in the microsoft SDK, but don't seem to work
* as on linux , so just prefer the v4 - only approach there for now . */
int i ;
for ( i = 0 ; i < nb_sources ; i + + ) {
struct group_source_req mreqs ;
int level = addr - > sa_family = = AF_INET ? IPPROTO_IP : IPPROTO_IPV6 ;
struct addrinfo * sourceaddr = udp_resolve_host ( sources [ i ] , 0 ,
SOCK_DGRAM , AF_UNSPEC ,
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0 ) ;
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if ( ! sourceaddr )
return AVERROR ( ENOENT ) ;
mreqs . gsr_interface = 0 ;
memcpy ( & mreqs . gsr_group , addr , addr_len ) ;
memcpy ( & mreqs . gsr_source , sourceaddr - > ai_addr , sourceaddr - > ai_addrlen ) ;
freeaddrinfo ( sourceaddr ) ;
if ( setsockopt ( sockfd , level ,
include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE ,
( const void * ) & mreqs , sizeof ( mreqs ) ) < 0 ) {
if ( include )
log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(MCAST_JOIN_SOURCE_GROUP) " ) ;
else
log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(MCAST_BLOCK_SOURCE) " ) ;
return ff_neterrno ( ) ;
}
}
# elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
int i ;
if ( addr - > sa_family ! = AF_INET ) {
av_log ( NULL , AV_LOG_ERROR ,
" Setting multicast sources only supported for IPv4 \n " ) ;
return AVERROR ( EINVAL ) ;
}
for ( i = 0 ; i < nb_sources ; i + + ) {
struct ip_mreq_source mreqs ;
struct addrinfo * sourceaddr = udp_resolve_host ( sources [ i ] , 0 ,
SOCK_DGRAM , AF_UNSPEC ,
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0 ) ;
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if ( ! sourceaddr )
return AVERROR ( ENOENT ) ;
if ( sourceaddr - > ai_addr - > sa_family ! = AF_INET ) {
freeaddrinfo ( sourceaddr ) ;
av_log ( NULL , AV_LOG_ERROR , " %s is of incorrect protocol family \n " ,
sources [ i ] ) ;
return AVERROR ( EINVAL ) ;
}
mreqs . imr_multiaddr . s_addr = ( ( struct sockaddr_in * ) addr ) - > sin_addr . s_addr ;
mreqs . imr_interface . s_addr = INADDR_ANY ;
mreqs . imr_sourceaddr . s_addr = ( ( struct sockaddr_in * ) sourceaddr - > ai_addr ) - > sin_addr . s_addr ;
freeaddrinfo ( sourceaddr ) ;
if ( setsockopt ( sockfd , IPPROTO_IP ,
include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE ,
( const void * ) & mreqs , sizeof ( mreqs ) ) < 0 ) {
if ( include )
log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IP_ADD_SOURCE_MEMBERSHIP) " ) ;
else
log_net_error ( NULL , AV_LOG_ERROR , " setsockopt(IP_BLOCK_SOURCE) " ) ;
return ff_neterrno ( ) ;
}
}
# else
return AVERROR ( ENOSYS ) ;
# endif
return 0 ;
}
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static int udp_set_url ( struct sockaddr_storage * addr ,
const char * hostname , int port )
{
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struct addrinfo * res0 ;
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int addr_len ;
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res0 = udp_resolve_host ( hostname , port , SOCK_DGRAM , AF_UNSPEC , 0 ) ;
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if ( ! res0 ) return AVERROR ( EIO ) ;
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memcpy ( addr , res0 - > ai_addr , res0 - > ai_addrlen ) ;
addr_len = res0 - > ai_addrlen ;
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freeaddrinfo ( res0 ) ;
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return addr_len ;
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}
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static int udp_socket_create ( UDPContext * s , struct sockaddr_storage * addr ,
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socklen_t * addr_len , const char * localaddr )
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{
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int udp_fd = - 1 ;
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struct addrinfo * res0 , * res ;
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int family = AF_UNSPEC ;
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2007-10-31 07:27:38 +00:00
if ( ( ( struct sockaddr * ) & s - > dest_addr ) - > sa_family )
family = ( ( struct sockaddr * ) & s - > dest_addr ) - > sa_family ;
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res0 = udp_resolve_host ( ( localaddr & & localaddr [ 0 ] ) ? localaddr : NULL , s - > local_port ,
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SOCK_DGRAM , family , AI_PASSIVE ) ;
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if ( ! res0 )
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goto fail ;
for ( res = res0 ; res ; res = res - > ai_next ) {
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if ( s - > udplite_coverage )
udp_fd = ff_socket ( res - > ai_family , SOCK_DGRAM , IPPROTO_UDPLITE ) ;
else
udp_fd = ff_socket ( res - > ai_family , SOCK_DGRAM , 0 ) ;
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if ( udp_fd ! = - 1 ) break ;
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log_net_error ( NULL , AV_LOG_ERROR , " socket " ) ;
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}
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if ( udp_fd < 0 )
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goto fail ;
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memcpy ( addr , res - > ai_addr , res - > ai_addrlen ) ;
* addr_len = res - > ai_addrlen ;
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freeaddrinfo ( res0 ) ;
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2004-11-09 00:27:16 +00:00
return udp_fd ;
2005-12-17 18:14:38 +00:00
2004-11-09 00:27:16 +00:00
fail :
if ( udp_fd > = 0 )
closesocket ( udp_fd ) ;
2005-02-24 19:08:50 +00:00
if ( res0 )
freeaddrinfo ( res0 ) ;
2004-11-09 00:27:16 +00:00
return - 1 ;
}
2007-11-15 14:26:52 +00:00
static int udp_port ( struct sockaddr_storage * addr , int addr_len )
{
2008-02-11 03:30:42 +00:00
char sbuf [ sizeof ( int ) * 3 + 1 ] ;
2012-06-19 12:28:48 +00:00
int error ;
2007-11-15 14:26:52 +00:00
2012-06-19 12:28:48 +00:00
if ( ( error = getnameinfo ( ( struct sockaddr * ) addr , addr_len , NULL , 0 , sbuf , sizeof ( sbuf ) , NI_NUMERICSERV ) ) ! = 0 ) {
av_log ( NULL , AV_LOG_ERROR , " getnameinfo: %s \n " , gai_strerror ( error ) ) ;
2007-11-15 14:26:52 +00:00
return - 1 ;
}
return strtol ( sbuf , NULL , 10 ) ;
}
2004-11-09 00:27:16 +00:00
2002-07-24 17:45:41 +00:00
/**
* If no filename is given to av_open_input_file because you want to
* get the local port first , then you must call this function to set
* the remote server address .
*
* url syntax : udp : //host:port[?option=val...]
2008-04-15 11:23:07 +00:00
* option : ' ttl = n ' : set the ttl value ( for multicast only )
2002-07-24 17:45:41 +00:00
* ' localport = n ' : set the local port
2003-02-09 18:06:23 +00:00
* ' pkt_size = n ' : set max packet size
2006-10-28 17:16:18 +00:00
* ' reuse = 1 ' : enable reusing the socket
2012-03-12 15:09:53 +00:00
* ' overrun_nonfatal = 1 ' : survive in case of circular buffer overrun
2002-07-24 17:45:41 +00:00
*
2010-07-02 10:49:29 +00:00
* @ param h media file context
2002-07-24 17:45:41 +00:00
* @ param uri of the remote server
* @ return zero if no error .
*/
2011-03-08 09:35:52 +00:00
int ff_udp_set_remote_url ( URLContext * h , const char * uri )
2002-07-24 17:45:41 +00:00
{
UDPContext * s = h - > priv_data ;
2011-01-06 15:16:50 +00:00
char hostname [ 256 ] , buf [ 10 ] ;
2002-07-24 17:45:41 +00:00
int port ;
2011-01-06 15:16:50 +00:00
const char * p ;
2005-12-17 18:14:38 +00:00
2010-06-27 14:16:46 +00:00
av_url_split ( NULL , 0 , NULL , 0 , hostname , sizeof ( hostname ) , & port , NULL , 0 , uri ) ;
2001-07-22 14:18:56 +00:00
2002-07-24 17:45:41 +00:00
/* set the destination address */
2007-11-14 08:16:51 +00:00
s - > dest_addr_len = udp_set_url ( & s - > dest_addr , hostname , port ) ;
if ( s - > dest_addr_len < 0 ) {
2007-07-19 15:23:32 +00:00
return AVERROR ( EIO ) ;
2007-11-14 08:16:51 +00:00
}
2010-10-07 07:58:56 +00:00
s - > is_multicast = ff_is_multicast_address ( ( struct sockaddr * ) & s - > dest_addr ) ;
2011-01-06 15:16:50 +00:00
p = strchr ( uri , ' ? ' ) ;
if ( p ) {
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " connect " , p ) ) {
2011-01-06 15:16:50 +00:00
int was_connected = s - > is_connected ;
s - > is_connected = strtol ( buf , NULL , 10 ) ;
if ( s - > is_connected & & ! was_connected ) {
if ( connect ( s - > udp_fd , ( struct sockaddr * ) & s - > dest_addr ,
s - > dest_addr_len ) ) {
s - > is_connected = 0 ;
2012-06-19 12:37:06 +00:00
log_net_error ( h , AV_LOG_ERROR , " connect " ) ;
2011-01-06 15:16:50 +00:00
return AVERROR ( EIO ) ;
}
}
}
}
2007-11-14 08:16:51 +00:00
2002-07-24 17:45:41 +00:00
return 0 ;
}
/**
2010-06-14 09:09:59 +00:00
* Return the local port used by the UDP connection
2010-07-02 10:49:29 +00:00
* @ param h media file context
2002-07-24 17:45:41 +00:00
* @ return the local port number
*/
2011-03-08 09:35:52 +00:00
int ff_udp_get_local_port ( URLContext * h )
2002-07-24 17:45:41 +00:00
{
UDPContext * s = h - > priv_data ;
return s - > local_port ;
}
/**
* Return the udp file handle for select ( ) usage to wait for several RTP
* streams at the same time .
* @ param h media file context
*/
2011-02-03 11:39:11 +00:00
static int udp_get_file_handle ( URLContext * h )
2002-07-24 17:45:41 +00:00
{
UDPContext * s = h - > priv_data ;
return s - > udp_fd ;
}
2012-05-08 17:36:06 +00:00
# if HAVE_PTHREAD_CANCEL
2011-05-13 14:28:42 +00:00
static void * circular_buffer_task ( void * _URLContext )
{
URLContext * h = _URLContext ;
UDPContext * s = h - > priv_data ;
2012-03-15 12:03:38 +00:00
int old_cancelstate ;
2011-05-13 14:28:42 +00:00
2012-03-15 12:03:38 +00:00
pthread_setcancelstate ( PTHREAD_CANCEL_DISABLE , & old_cancelstate ) ;
2012-03-15 12:35:27 +00:00
pthread_mutex_lock ( & s - > mutex ) ;
2012-11-05 20:21:04 +00:00
if ( ff_socket_nonblock ( s - > udp_fd , 0 ) < 0 ) {
av_log ( h , AV_LOG_ERROR , " Failed to set blocking mode " ) ;
s - > circular_buffer_error = AVERROR ( EIO ) ;
goto end ;
}
2012-03-15 12:03:38 +00:00
while ( 1 ) {
2011-05-13 14:28:42 +00:00
int len ;
2012-03-15 12:35:27 +00:00
pthread_mutex_unlock ( & s - > mutex ) ;
2012-03-15 12:03:38 +00:00
/* Blocking operations are always cancellation points;
see " General Information " / " Thread Cancelation Overview "
in Single Unix . */
pthread_setcancelstate ( PTHREAD_CANCEL_ENABLE , & old_cancelstate ) ;
2011-08-25 19:33:54 +00:00
len = recv ( s - > udp_fd , s - > tmp + 4 , sizeof ( s - > tmp ) - 4 , 0 ) ;
2012-03-15 12:03:38 +00:00
pthread_setcancelstate ( PTHREAD_CANCEL_DISABLE , & old_cancelstate ) ;
2012-03-15 12:35:27 +00:00
pthread_mutex_lock ( & s - > mutex ) ;
2011-05-13 14:28:42 +00:00
if ( len < 0 ) {
if ( ff_neterrno ( ) ! = AVERROR ( EAGAIN ) & & ff_neterrno ( ) ! = AVERROR ( EINTR ) ) {
2012-03-15 12:42:34 +00:00
s - > circular_buffer_error = ff_neterrno ( ) ;
2011-12-23 00:17:18 +00:00
goto end ;
2011-05-13 14:28:42 +00:00
}
2011-08-25 19:43:30 +00:00
continue ;
2011-05-13 14:28:42 +00:00
}
2011-08-25 19:33:54 +00:00
AV_WL32 ( s - > tmp , len ) ;
2012-03-15 12:11:06 +00:00
if ( av_fifo_space ( s - > fifo ) < len + 4 ) {
2012-03-12 15:09:53 +00:00
/* No Space left */
if ( s - > overrun_nonfatal ) {
av_log ( h , AV_LOG_WARNING , " Circular buffer overrun. "
" Surviving due to overrun_nonfatal option \n " ) ;
continue ;
} else {
av_log ( h , AV_LOG_ERROR , " Circular buffer overrun. "
" To avoid, increase fifo_size URL option. "
" To survive in such case, use overrun_nonfatal option \n " ) ;
s - > circular_buffer_error = AVERROR ( EIO ) ;
goto end ;
}
}
2011-08-25 19:33:54 +00:00
av_fifo_generic_write ( s - > fifo , s - > tmp , len + 4 , NULL ) ;
2011-12-23 00:17:18 +00:00
pthread_cond_signal ( & s - > cond ) ;
2011-05-13 14:28:42 +00:00
}
2011-12-23 00:17:18 +00:00
end :
pthread_cond_signal ( & s - > cond ) ;
pthread_mutex_unlock ( & s - > mutex ) ;
2011-05-13 14:28:42 +00:00
return NULL ;
}
2011-12-23 00:17:18 +00:00
# endif
2011-05-13 14:28:42 +00:00
2013-07-26 19:05:21 +00:00
static int parse_source_list ( char * buf , char * * sources , int * num_sources ,
int max_sources )
{
char * source_start ;
source_start = buf ;
while ( 1 ) {
char * next = strchr ( source_start , ' , ' ) ;
if ( next )
* next = ' \0 ' ;
sources [ * num_sources ] = av_strdup ( source_start ) ;
if ( ! sources [ * num_sources ] )
return AVERROR ( ENOMEM ) ;
source_start = next + 1 ;
( * num_sources ) + + ;
if ( * num_sources > = max_sources | | ! next )
break ;
}
return 0 ;
}
2002-07-24 17:45:41 +00:00
/* put it in UDP context */
2001-07-22 14:18:56 +00:00
/* return non zero if error */
static int udp_open ( URLContext * h , const char * uri , int flags )
{
2011-11-09 09:45:01 +00:00
char hostname [ 1024 ] , localaddr [ 1024 ] = " " ;
2014-05-23 13:26:32 +00:00
int port , udp_fd = - 1 , tmp , bind_ret = - 1 , dscp = - 1 ;
2011-12-01 09:44:21 +00:00
UDPContext * s = h - > priv_data ;
2005-02-24 19:08:50 +00:00
int is_output ;
2002-07-24 17:45:41 +00:00
const char * p ;
char buf [ 256 ] ;
2007-11-15 14:26:52 +00:00
struct sockaddr_storage my_addr ;
2012-10-26 18:46:37 +00:00
socklen_t len ;
2013-07-26 19:05:21 +00:00
int i , num_include_sources = 0 , num_exclude_sources = 0 ;
char * include_sources [ 32 ] , * exclude_sources [ 32 ] ;
2001-07-22 14:18:56 +00:00
h - > is_streamed = 1 ;
2011-05-09 13:56:56 +00:00
is_output = ! ( flags & AVIO_FLAG_READ ) ;
2015-03-13 16:00:12 +00:00
if ( s - > buffer_size < 0 )
2012-09-13 11:10:26 +00:00
s - > buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE ;
2011-05-13 14:28:42 +00:00
2015-03-13 16:00:12 +00:00
if ( s - > sources ) {
if ( parse_source_list ( s - > sources , include_sources ,
& num_include_sources ,
FF_ARRAY_ELEMS ( include_sources ) ) )
goto fail ;
}
if ( s - > block ) {
if ( parse_source_list ( s - > block , exclude_sources , & num_exclude_sources ,
FF_ARRAY_ELEMS ( exclude_sources ) ) )
goto fail ;
}
2015-03-29 13:19:35 +00:00
if ( s - > pkt_size > 0 )
2015-03-13 16:00:12 +00:00
h - > max_packet_size = s - > pkt_size ;
2008-11-12 21:40:53 +00:00
2002-07-24 17:45:41 +00:00
p = strchr ( uri , ' ? ' ) ;
if ( p ) {
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " reuse " , p ) ) {
2011-06-17 07:08:23 +00:00
char * endptr = NULL ;
2011-02-07 21:14:43 +00:00
s - > reuse_socket = strtol ( buf , & endptr , 10 ) ;
/* assume if no digits were found it is a request to enable it */
if ( buf = = endptr )
s - > reuse_socket = 1 ;
}
2012-03-12 15:09:53 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " overrun_nonfatal " , p ) ) {
char * endptr = NULL ;
s - > overrun_nonfatal = strtol ( buf , & endptr , 10 ) ;
/* assume if no digits were found it is a request to enable it */
if ( buf = = endptr )
s - > overrun_nonfatal = 1 ;
2012-07-18 14:33:24 +00:00
if ( ! HAVE_PTHREAD_CANCEL )
av_log ( h , AV_LOG_WARNING ,
" 'overrun_nonfatal' option was set but it is not supported "
" on this build (pthread support is required) \n " ) ;
2012-03-12 15:09:53 +00:00
}
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " ttl " , p ) ) {
2002-07-24 17:45:41 +00:00
s - > ttl = strtol ( buf , NULL , 10 ) ;
}
2014-11-05 09:59:44 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " udplite_coverage " , p ) ) {
s - > udplite_coverage = strtol ( buf , NULL , 10 ) ;
}
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " localport " , p ) ) {
2002-07-24 17:45:41 +00:00
s - > local_port = strtol ( buf , NULL , 10 ) ;
}
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " pkt_size " , p ) ) {
2015-03-15 22:25:33 +00:00
s - > pkt_size = strtol ( buf , NULL , 10 ) ;
2003-02-09 18:06:23 +00:00
}
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " buffer_size " , p ) ) {
2008-11-12 21:40:53 +00:00
s - > buffer_size = strtol ( buf , NULL , 10 ) ;
}
2011-02-16 08:52:38 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " connect " , p ) ) {
2010-10-08 08:42:30 +00:00
s - > is_connected = strtol ( buf , NULL , 10 ) ;
}
2014-05-23 13:26:32 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " dscp " , p ) ) {
dscp = strtol ( buf , NULL , 10 ) ;
}
2011-07-25 13:50:13 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " fifo_size " , p ) ) {
2012-09-13 11:10:26 +00:00
s - > circular_buffer_size = strtol ( buf , NULL , 10 ) ;
2012-07-18 14:33:24 +00:00
if ( ! HAVE_PTHREAD_CANCEL )
av_log ( h , AV_LOG_WARNING ,
" 'circular_buffer_size' option was set but it is not supported "
" on this build (pthread support is required) \n " ) ;
2011-05-13 14:28:42 +00:00
}
2011-11-09 09:45:01 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " localaddr " , p ) ) {
av_strlcpy ( localaddr , buf , sizeof ( localaddr ) ) ;
}
2013-07-26 19:05:21 +00:00
if ( av_find_info_tag ( buf , sizeof ( buf ) , " sources " , p ) ) {
if ( parse_source_list ( buf , include_sources , & num_include_sources ,
FF_ARRAY_ELEMS ( include_sources ) ) )
goto fail ;
}
if ( av_find_info_tag ( buf , sizeof ( buf ) , " block " , p ) ) {
if ( parse_source_list ( buf , exclude_sources , & num_exclude_sources ,
FF_ARRAY_ELEMS ( exclude_sources ) ) )
goto fail ;
2012-06-21 11:19:56 +00:00
}
2012-08-27 13:31:09 +00:00
if ( ! is_output & & av_find_info_tag ( buf , sizeof ( buf ) , " timeout " , p ) )
2012-09-13 11:10:26 +00:00
s - > timeout = strtol ( buf , NULL , 10 ) ;
2014-04-09 03:21:52 +00:00
if ( is_output & & av_find_info_tag ( buf , sizeof ( buf ) , " broadcast " , p ) )
s - > is_broadcast = strtol ( buf , NULL , 10 ) ;
2001-07-22 14:18:56 +00:00
}
2012-09-13 11:10:26 +00:00
/* handling needed to support options picking from both AVOption and URL */
s - > circular_buffer_size * = 188 ;
2013-06-28 21:58:13 +00:00
if ( flags & AVIO_FLAG_WRITE ) {
2015-03-15 22:25:33 +00:00
h - > max_packet_size = s - > pkt_size ;
2013-06-28 21:58:13 +00:00
} else {
h - > max_packet_size = UDP_MAX_PKT_SIZE ;
}
2012-09-13 11:10:26 +00:00
h - > rw_timeout = s - > timeout ;
2002-07-24 17:45:41 +00:00
/* fill the dest addr */
2010-06-27 14:16:46 +00:00
av_url_split ( NULL , 0 , NULL , 0 , hostname , sizeof ( hostname ) , & port , NULL , 0 , uri ) ;
2005-12-17 18:14:38 +00:00
2010-06-27 14:16:46 +00:00
/* XXX: fix av_url_split */
2002-07-24 17:45:41 +00:00
if ( hostname [ 0 ] = = ' \0 ' | | hostname [ 0 ] = = ' ? ' ) {
/* only accepts null hostname if input */
2011-05-09 13:56:56 +00:00
if ( ! ( flags & AVIO_FLAG_READ ) )
2002-07-24 17:45:41 +00:00
goto fail ;
} else {
2011-03-08 09:35:52 +00:00
if ( ff_udp_set_remote_url ( h , uri ) < 0 )
2010-07-28 16:27:16 +00:00
goto fail ;
2002-07-24 17:45:41 +00:00
}
2001-07-22 14:18:56 +00:00
2015-03-15 22:25:33 +00:00
if ( ( s - > is_multicast | | s - > local_port < = 0 ) & & ( h - > flags & AVIO_FLAG_READ ) )
2007-11-15 13:34:56 +00:00
s - > local_port = port ;
2015-03-13 16:00:12 +00:00
if ( localaddr [ 0 ] )
udp_fd = udp_socket_create ( s , & my_addr , & len , localaddr ) ;
else
udp_fd = udp_socket_create ( s , & my_addr , & len , s - > localaddr ) ;
2002-07-24 17:45:41 +00:00
if ( udp_fd < 0 )
goto fail ;
2013-12-13 10:49:34 +00:00
s - > local_addr_storage = my_addr ; //store for future multicast join
2011-02-07 21:14:43 +00:00
/* Follow the requested reuse option, unless it's multicast in which
2011-10-05 12:12:42 +00:00
* case enable reuse unless explicitly disabled .
2011-02-07 21:14:43 +00:00
*/
2015-03-13 16:00:12 +00:00
if ( s - > reuse_socket > 0 | | ( s - > is_multicast & & s - > reuse_socket < 0 ) ) {
2011-02-07 21:14:43 +00:00
s - > reuse_socket = 1 ;
2006-10-28 17:16:18 +00:00
if ( setsockopt ( udp_fd , SOL_SOCKET , SO_REUSEADDR , & ( s - > reuse_socket ) , sizeof ( s - > reuse_socket ) ) ! = 0 )
goto fail ;
2011-02-07 21:14:43 +00:00
}
2006-10-28 17:16:18 +00:00
2014-04-09 03:21:52 +00:00
if ( s - > is_broadcast ) {
2014-06-07 12:43:07 +00:00
# ifdef SO_BROADCAST
2014-04-09 03:21:52 +00:00
if ( setsockopt ( udp_fd , SOL_SOCKET , SO_BROADCAST , & ( s - > is_broadcast ) , sizeof ( s - > is_broadcast ) ) ! = 0 )
2014-06-07 12:43:07 +00:00
# endif
2014-04-09 03:21:52 +00:00
goto fail ;
}
2014-11-05 09:59:44 +00:00
/* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
* The receiver coverage has to be less than or equal to the sender coverage .
* Otherwise , the receiver will drop all packets .
*/
if ( s - > udplite_coverage ) {
if ( setsockopt ( udp_fd , IPPROTO_UDPLITE , UDPLITE_SEND_CSCOV , & ( s - > udplite_coverage ) , sizeof ( s - > udplite_coverage ) ) ! = 0 )
av_log ( h , AV_LOG_WARNING , " socket option UDPLITE_SEND_CSCOV not available " ) ;
if ( setsockopt ( udp_fd , IPPROTO_UDPLITE , UDPLITE_RECV_CSCOV , & ( s - > udplite_coverage ) , sizeof ( s - > udplite_coverage ) ) ! = 0 )
av_log ( h , AV_LOG_WARNING , " socket option UDPLITE_RECV_CSCOV not available " ) ;
}
2014-05-23 13:26:32 +00:00
if ( dscp > = 0 ) {
dscp < < = 2 ;
if ( setsockopt ( udp_fd , IPPROTO_IP , IP_TOS , & dscp , sizeof ( dscp ) ) ! = 0 )
goto fail ;
}
2012-03-08 13:15:11 +00:00
/* If multicast, try binding the multicast address first, to avoid
* receiving UDP packets from other sources aimed at the same UDP
2012-03-08 13:17:15 +00:00
* port . This fails on windows . This makes sending to the same address
* using sendto ( ) fail , so only do it if we ' re opened in read - only mode . */
if ( s - > is_multicast & & ! ( h - > flags & AVIO_FLAG_WRITE ) ) {
2008-12-07 17:29:09 +00:00
bind_ret = bind ( udp_fd , ( struct sockaddr * ) & s - > dest_addr , len ) ;
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
2012-03-07 22:38:02 +00:00
/* the bind is needed to give a port to the socket now */
2012-03-07 19:40:29 +00:00
if ( bind_ret < 0 & & bind ( udp_fd , ( struct sockaddr * ) & my_addr , len ) < 0 ) {
2012-06-19 12:37:06 +00:00
log_net_error ( h , AV_LOG_ERROR , " bind failed " ) ;
2001-07-22 14:18:56 +00:00
goto fail ;
2012-03-07 19:40:29 +00:00
}
2001-07-22 14:18:56 +00:00
2007-11-15 13:41:51 +00:00
len = sizeof ( my_addr ) ;
getsockname ( udp_fd , ( struct sockaddr * ) & my_addr , & len ) ;
2007-11-15 14:26:52 +00:00
s - > local_port = udp_port ( & my_addr , len ) ;
2004-11-09 00:27:16 +00:00
if ( s - > is_multicast ) {
2012-03-08 13:31:45 +00:00
if ( h - > flags & AVIO_FLAG_WRITE ) {
2007-11-14 07:42:46 +00:00
/* output */
2007-11-14 07:43:51 +00:00
if ( udp_set_multicast_ttl ( udp_fd , s - > ttl , ( struct sockaddr * ) & s - > dest_addr ) < 0 )
2004-11-09 00:27:16 +00:00
goto fail ;
2012-03-08 13:31:45 +00:00
}
if ( h - > flags & AVIO_FLAG_READ ) {
2007-11-14 07:42:46 +00:00
/* input */
2013-07-26 19:05:21 +00:00
if ( num_include_sources & & num_exclude_sources ) {
av_log ( h , AV_LOG_ERROR , " Simultaneously including and excluding multicast sources is not supported \n " ) ;
goto fail ;
}
if ( num_include_sources ) {
if ( udp_set_multicast_sources ( udp_fd , ( struct sockaddr * ) & s - > dest_addr , s - > dest_addr_len , include_sources , num_include_sources , 1 ) < 0 )
goto fail ;
} else {
2013-12-13 10:49:34 +00:00
if ( udp_join_multicast_group ( udp_fd , ( struct sockaddr * ) & s - > dest_addr , ( struct sockaddr * ) & s - > local_addr_storage ) < 0 )
2012-06-21 11:19:56 +00:00
goto fail ;
2013-07-26 19:05:21 +00:00
}
if ( num_exclude_sources ) {
if ( udp_set_multicast_sources ( udp_fd , ( struct sockaddr * ) & s - > dest_addr , s - > dest_addr_len , exclude_sources , num_exclude_sources , 0 ) < 0 )
2012-06-21 11:19:56 +00:00
goto fail ;
}
2004-11-09 00:27:16 +00:00
}
}
2001-07-22 14:18:56 +00:00
2002-07-24 17:45:41 +00:00
if ( is_output ) {
/* limit the tx buf size to limit latency */
2008-11-12 21:40:53 +00:00
tmp = s - > buffer_size ;
2002-07-24 17:45:41 +00:00
if ( setsockopt ( udp_fd , SOL_SOCKET , SO_SNDBUF , & tmp , sizeof ( tmp ) ) < 0 ) {
2012-06-19 12:37:06 +00:00
log_net_error ( h , AV_LOG_ERROR , " setsockopt(SO_SNDBUF) " ) ;
2002-07-24 17:45:41 +00:00
goto fail ;
}
2007-08-16 22:12:03 +00:00
} else {
2014-03-21 23:37:42 +00:00
/* set udp recv buffer size to the requested value (default 64K) */
2008-11-12 21:40:53 +00:00
tmp = s - > buffer_size ;
if ( setsockopt ( udp_fd , SOL_SOCKET , SO_RCVBUF , & tmp , sizeof ( tmp ) ) < 0 ) {
2012-06-19 12:37:06 +00:00
log_net_error ( h , AV_LOG_WARNING , " setsockopt(SO_RECVBUF) " ) ;
2008-11-12 21:40:53 +00:00
}
2014-01-06 19:57:52 +00:00
len = sizeof ( tmp ) ;
if ( getsockopt ( udp_fd , SOL_SOCKET , SO_RCVBUF , & tmp , & len ) < 0 ) {
log_net_error ( h , AV_LOG_WARNING , " getsockopt(SO_RCVBUF) " ) ;
2014-03-21 23:37:42 +00:00
} else {
2014-01-06 19:57:52 +00:00
av_log ( h , AV_LOG_DEBUG , " end receive buffer size reported is %d \n " , tmp ) ;
2014-03-21 23:37:42 +00:00
if ( tmp < s - > buffer_size )
av_log ( h , AV_LOG_WARNING , " attempted to set receive buffer to size %d but it only ended up set as %d " , s - > buffer_size , tmp ) ;
}
2014-01-06 19:57:52 +00:00
2008-11-17 07:50:25 +00:00
/* make the socket non-blocking */
ff_socket_nonblock ( udp_fd , 1 ) ;
2002-07-24 17:45:41 +00:00
}
2010-10-08 08:42:30 +00:00
if ( s - > is_connected ) {
if ( connect ( udp_fd , ( struct sockaddr * ) & s - > dest_addr , s - > dest_addr_len ) ) {
2012-06-19 12:37:06 +00:00
log_net_error ( h , AV_LOG_ERROR , " connect " ) ;
2010-10-08 08:42:30 +00:00
goto fail ;
}
}
2002-07-24 17:45:41 +00:00
2013-07-26 19:05:21 +00:00
for ( i = 0 ; i < num_include_sources ; i + + )
av_freep ( & include_sources [ i ] ) ;
for ( i = 0 ; i < num_exclude_sources ; i + + )
av_freep ( & exclude_sources [ i ] ) ;
2012-06-21 11:19:56 +00:00
2002-07-24 17:45:41 +00:00
s - > udp_fd = udp_fd ;
2011-05-13 14:28:42 +00:00
2012-05-08 17:36:06 +00:00
# if HAVE_PTHREAD_CANCEL
2011-05-13 14:28:42 +00:00
if ( ! is_output & & s - > circular_buffer_size ) {
2012-01-14 16:14:18 +00:00
int ret ;
2011-05-13 14:28:42 +00:00
/* start the task going */
2011-05-13 15:16:15 +00:00
s - > fifo = av_fifo_alloc ( s - > circular_buffer_size ) ;
2012-01-14 16:14:18 +00:00
ret = pthread_mutex_init ( & s - > mutex , NULL ) ;
if ( ret ! = 0 ) {
av_log ( h , AV_LOG_ERROR , " pthread_mutex_init failed : %s \n " , strerror ( ret ) ) ;
2011-05-13 14:28:42 +00:00
goto fail ;
}
2012-01-14 16:14:18 +00:00
ret = pthread_cond_init ( & s - > cond , NULL ) ;
if ( ret ! = 0 ) {
av_log ( h , AV_LOG_ERROR , " pthread_cond_init failed : %s \n " , strerror ( ret ) ) ;
goto cond_fail ;
}
ret = pthread_create ( & s - > circular_buffer_thread , NULL , circular_buffer_task , h ) ;
if ( ret ! = 0 ) {
av_log ( h , AV_LOG_ERROR , " pthread_create failed : %s \n " , strerror ( ret ) ) ;
goto thread_fail ;
}
s - > thread_started = 1 ;
2011-05-13 14:28:42 +00:00
}
2011-06-04 14:55:22 +00:00
# endif
2011-05-13 14:28:42 +00:00
2001-07-22 14:18:56 +00:00
return 0 ;
2012-05-08 17:36:06 +00:00
# if HAVE_PTHREAD_CANCEL
2012-01-14 16:14:18 +00:00
thread_fail :
pthread_cond_destroy ( & s - > cond ) ;
cond_fail :
pthread_mutex_destroy ( & s - > mutex ) ;
# endif
2001-07-22 14:18:56 +00:00
fail :
2002-07-24 17:45:41 +00:00
if ( udp_fd > = 0 )
2002-11-02 10:35:07 +00:00
closesocket ( udp_fd ) ;
2014-05-06 19:48:14 +00:00
av_fifo_freep ( & s - > fifo ) ;
2013-07-26 19:05:21 +00:00
for ( i = 0 ; i < num_include_sources ; i + + )
av_freep ( & include_sources [ i ] ) ;
for ( i = 0 ; i < num_exclude_sources ; i + + )
av_freep ( & exclude_sources [ i ] ) ;
2007-07-19 15:23:32 +00:00
return AVERROR ( EIO ) ;
2001-07-22 14:18:56 +00:00
}
2014-11-05 09:59:44 +00:00
static int udplite_open ( URLContext * h , const char * uri , int flags )
{
UDPContext * s = h - > priv_data ;
// set default checksum coverage
s - > udplite_coverage = UDP_HEADER_SIZE ;
return udp_open ( h , uri , flags ) ;
}
2003-02-11 16:35:48 +00:00
static int udp_read ( URLContext * h , uint8_t * buf , int size )
2001-07-22 14:18:56 +00:00
{
UDPContext * s = h - > priv_data ;
2008-11-14 19:33:22 +00:00
int ret ;
2014-08-30 10:42:16 +00:00
# if HAVE_PTHREAD_CANCEL
2012-03-15 11:19:37 +00:00
int avail , nonblock = h - > flags & AVIO_FLAG_NONBLOCK ;
2011-05-13 14:28:42 +00:00
2011-05-14 11:34:08 +00:00
if ( s - > fifo ) {
2011-12-23 00:17:18 +00:00
pthread_mutex_lock ( & s - > mutex ) ;
2011-05-13 14:28:42 +00:00
do {
2011-05-13 15:16:15 +00:00
avail = av_fifo_size ( s - > fifo ) ;
2011-05-13 14:28:42 +00:00
if ( avail ) { // >=size) {
2011-08-25 19:33:54 +00:00
uint8_t tmp [ 4 ] ;
av_fifo_generic_read ( s - > fifo , tmp , 4 , NULL ) ;
avail = AV_RL32 ( tmp ) ;
if ( avail > size ) {
av_log ( h , AV_LOG_WARNING , " Part of datagram lost due to insufficient buffer size \n " ) ;
avail = size ;
}
2011-05-13 14:28:42 +00:00
2011-08-25 19:33:54 +00:00
av_fifo_generic_read ( s - > fifo , buf , avail , NULL ) ;
2011-11-09 02:51:08 +00:00
av_fifo_drain ( s - > fifo , AV_RL32 ( tmp ) - avail ) ;
2012-03-15 12:35:27 +00:00
pthread_mutex_unlock ( & s - > mutex ) ;
2011-08-25 19:33:54 +00:00
return avail ;
2011-12-23 00:41:15 +00:00
} else if ( s - > circular_buffer_error ) {
2012-03-15 12:35:27 +00:00
int err = s - > circular_buffer_error ;
2011-12-23 00:17:18 +00:00
pthread_mutex_unlock ( & s - > mutex ) ;
2012-03-15 12:35:27 +00:00
return err ;
2012-03-15 11:19:37 +00:00
} else if ( nonblock ) {
2011-12-23 00:51:47 +00:00
pthread_mutex_unlock ( & s - > mutex ) ;
return AVERROR ( EAGAIN ) ;
2011-05-13 14:28:42 +00:00
}
else {
2012-03-15 11:19:37 +00:00
/* FIXME: using the monotonic clock would be better,
but it does not exist on all supported platforms . */
int64_t t = av_gettime ( ) + 100000 ;
struct timespec tv = { . tv_sec = t / 1000000 ,
. tv_nsec = ( t % 1000000 ) * 1000 } ;
2012-10-20 21:31:32 +00:00
if ( pthread_cond_timedwait ( & s - > cond , & s - > mutex , & tv ) < 0 ) {
pthread_mutex_unlock ( & s - > mutex ) ;
2012-03-15 11:19:37 +00:00
return AVERROR ( errno = = ETIMEDOUT ? EAGAIN : errno ) ;
2012-10-20 21:31:32 +00:00
}
2012-03-15 11:19:37 +00:00
nonblock = 1 ;
2011-05-13 14:28:42 +00:00
}
} while ( 1 ) ;
}
2011-12-23 00:17:18 +00:00
# endif
2002-07-24 17:45:41 +00:00
2011-04-04 18:11:19 +00:00
if ( ! ( h - > flags & AVIO_FLAG_NONBLOCK ) ) {
2011-04-04 16:17:12 +00:00
ret = ff_network_wait_fd ( s - > udp_fd , 0 ) ;
if ( ret < 0 )
return ret ;
2002-07-24 17:45:41 +00:00
}
2011-04-04 16:17:12 +00:00
ret = recv ( s - > udp_fd , buf , size , 0 ) ;
2011-05-13 14:28:42 +00:00
2011-04-04 16:17:12 +00:00
return ret < 0 ? ff_neterrno ( ) : ret ;
2001-07-22 14:18:56 +00:00
}
2010-06-01 07:46:23 +00:00
static int udp_write ( URLContext * h , const uint8_t * buf , int size )
2001-07-22 14:18:56 +00:00
{
UDPContext * s = h - > priv_data ;
2002-07-24 17:45:41 +00:00
int ret ;
2011-04-04 18:11:19 +00:00
if ( ! ( h - > flags & AVIO_FLAG_NONBLOCK ) ) {
2011-04-04 16:17:12 +00:00
ret = ff_network_wait_fd ( s - > udp_fd , 1 ) ;
if ( ret < 0 )
return ret ;
2001-07-22 14:18:56 +00:00
}
2011-04-04 16:17:12 +00:00
if ( ! s - > is_connected ) {
ret = sendto ( s - > udp_fd , buf , size , 0 ,
( struct sockaddr * ) & s - > dest_addr ,
s - > dest_addr_len ) ;
} else
ret = send ( s - > udp_fd , buf , size , 0 ) ;
return ret < 0 ? ff_neterrno ( ) : ret ;
2002-07-24 17:45:41 +00:00
}
static int udp_close ( URLContext * h )
{
UDPContext * s = h - > priv_data ;
2011-05-09 13:56:56 +00:00
if ( s - > is_multicast & & ( h - > flags & AVIO_FLAG_READ ) )
2013-12-13 10:49:34 +00:00
udp_leave_multicast_group ( s - > udp_fd , ( struct sockaddr * ) & s - > dest_addr , ( struct sockaddr * ) & s - > local_addr_storage ) ;
2002-11-02 10:35:07 +00:00
closesocket ( s - > udp_fd ) ;
2012-05-08 17:36:06 +00:00
# if HAVE_PTHREAD_CANCEL
2012-01-14 16:14:18 +00:00
if ( s - > thread_started ) {
2014-08-30 10:42:16 +00:00
int ret ;
2012-03-15 12:03:38 +00:00
pthread_cancel ( s - > circular_buffer_thread ) ;
2012-01-14 16:14:18 +00:00
ret = pthread_join ( s - > circular_buffer_thread , NULL ) ;
if ( ret ! = 0 )
av_log ( h , AV_LOG_ERROR , " pthread_join(): %s \n " , strerror ( ret ) ) ;
2012-08-06 07:56:50 +00:00
pthread_mutex_destroy ( & s - > mutex ) ;
pthread_cond_destroy ( & s - > cond ) ;
2012-01-14 16:14:18 +00:00
}
2011-12-23 00:17:18 +00:00
# endif
2014-05-06 19:48:14 +00:00
av_fifo_freep ( & s - > fifo ) ;
2002-07-24 17:45:41 +00:00
return 0 ;
2001-07-22 14:18:56 +00:00
}
2011-01-25 22:03:28 +00:00
URLProtocol ff_udp_protocol = {
2011-04-08 05:41:47 +00:00
. name = " udp " ,
. url_open = udp_open ,
. url_read = udp_read ,
. url_write = udp_write ,
. url_close = udp_close ,
2009-03-03 17:04:51 +00:00
. url_get_file_handle = udp_get_file_handle ,
2011-12-01 09:44:21 +00:00
. priv_data_size = sizeof ( UDPContext ) ,
2015-03-13 16:00:12 +00:00
. priv_data_class = & udp_class ,
2011-12-30 09:38:05 +00:00
. flags = URL_PROTOCOL_FLAG_NETWORK ,
2001-07-22 14:18:56 +00:00
} ;
2014-11-05 09:59:44 +00:00
URLProtocol ff_udplite_protocol = {
. name = " udplite " ,
. url_open = udplite_open ,
. url_read = udp_read ,
. url_write = udp_write ,
. url_close = udp_close ,
. url_get_file_handle = udp_get_file_handle ,
. priv_data_size = sizeof ( UDPContext ) ,
. priv_data_class = & udplite_context_class ,
. flags = URL_PROTOCOL_FLAG_NETWORK ,
} ;