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968 lines
34 KiB
968 lines
34 KiB
/* |
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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. |
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* |
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* 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 |
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* 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 |
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* 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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/** |
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* @file |
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* UDP protocol |
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*/ |
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|
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#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */ |
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|
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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" |
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#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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|
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#if HAVE_UDPLITE_H |
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#include "udplite.h" |
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#else |
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/* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite. |
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* So, we provide a fallback here. |
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*/ |
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#define UDPLITE_SEND_CSCOV 10 |
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#define UDPLITE_RECV_CSCOV 11 |
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#endif |
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|
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#ifndef IPPROTO_UDPLITE |
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#define IPPROTO_UDPLITE 136 |
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#endif |
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|
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#if HAVE_PTHREAD_CANCEL |
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#include <pthread.h> |
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#endif |
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|
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#ifndef HAVE_PTHREAD_CANCEL |
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#define HAVE_PTHREAD_CANCEL 0 |
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#endif |
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|
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#ifndef IPV6_ADD_MEMBERSHIP |
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#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP |
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#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP |
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#endif |
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|
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#define UDP_TX_BUF_SIZE 32768 |
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#define UDP_MAX_PKT_SIZE 65536 |
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#define UDP_HEADER_SIZE 8 |
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|
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typedef struct UDPContext { |
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const AVClass *class; |
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int udp_fd; |
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int ttl; |
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int udplite_coverage; |
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int buffer_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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|
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/* Circular Buffer variables for use in UDP receive code */ |
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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; |
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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]; |
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int remaining_in_dg; |
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char *local_addr; |
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int packet_size; |
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int timeout; |
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struct sockaddr_storage local_addr_storage; |
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} UDPContext; |
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|
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#define OFFSET(x) offsetof(UDPContext, x) |
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#define D AV_OPT_FLAG_DECODING_PARAM |
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#define E AV_OPT_FLAG_ENCODING_PARAM |
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static const AVOption options[] = { |
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{"buffer_size", "set packet buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, |
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{"localport", "set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, |
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{"localaddr", "choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, 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 }, |
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{"pkt_size", "set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E }, |
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{"reuse", "explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, |
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{"broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E }, |
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{"ttl", "set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E }, |
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{"connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, |
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/* TODO 'sources', 'block' option */ |
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{"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 }, |
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{"overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D }, |
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{"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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{NULL} |
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}; |
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|
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static const AVClass udp_context_class = { |
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.class_name = "udp", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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|
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static const AVClass udplite_context_class = { |
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.class_name = "udplite", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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|
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static void log_net_error(void *ctx, int level, const char* prefix) |
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{ |
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char errbuf[100]; |
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av_strerror(ff_neterrno(), errbuf, sizeof(errbuf)); |
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av_log(ctx, level, "%s: %s\n", prefix, errbuf); |
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} |
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|
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static int udp_set_multicast_ttl(int sockfd, int mcastTTL, |
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struct sockaddr *addr) |
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{ |
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#ifdef IP_MULTICAST_TTL |
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if (addr->sa_family == AF_INET) { |
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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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} |
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} |
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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) { |
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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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} |
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} |
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#endif |
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return 0; |
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} |
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|
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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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|
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mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; |
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if (local_addr) |
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mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr; |
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else |
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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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} |
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} |
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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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|
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memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); |
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mreq6.ipv6mr_interface= 0; |
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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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} |
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} |
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#endif |
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return 0; |
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} |
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|
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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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|
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mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; |
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if (local_addr) |
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mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr; |
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else |
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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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} |
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} |
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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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|
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memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); |
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mreq6.ipv6mr_interface= 0; |
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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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} |
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} |
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#endif |
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return 0; |
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} |
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|
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static struct addrinfo* udp_resolve_host(const char *hostname, int port, |
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int type, int family, int flags) |
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{ |
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struct addrinfo hints = { 0 }, *res = 0; |
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int error; |
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char sport[16]; |
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const char *node = 0, *service = "0"; |
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|
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if (port > 0) { |
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snprintf(sport, sizeof(sport), "%d", port); |
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service = sport; |
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} |
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if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { |
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node = hostname; |
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} |
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hints.ai_socktype = type; |
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hints.ai_family = family; |
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hints.ai_flags = flags; |
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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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|
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return res; |
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} |
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|
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static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr, |
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int addr_len, char **sources, |
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int nb_sources, int include) |
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{ |
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#if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32) |
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/* These ones are available in the microsoft SDK, but don't seem to work |
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* as on linux, so just prefer the v4-only approach there for now. */ |
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int i; |
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for (i = 0; i < nb_sources; i++) { |
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struct group_source_req mreqs; |
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int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; |
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struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, |
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SOCK_DGRAM, AF_UNSPEC, |
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0); |
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if (!sourceaddr) |
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return AVERROR(ENOENT); |
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|
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mreqs.gsr_interface = 0; |
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memcpy(&mreqs.gsr_group, addr, addr_len); |
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memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen); |
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freeaddrinfo(sourceaddr); |
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|
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if (setsockopt(sockfd, level, |
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include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE, |
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(const void *)&mreqs, sizeof(mreqs)) < 0) { |
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if (include) |
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log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)"); |
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else |
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log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)"); |
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return ff_neterrno(); |
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} |
|
} |
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#elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE) |
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int i; |
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if (addr->sa_family != AF_INET) { |
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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); |
|
if (!sourceaddr) |
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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]); |
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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; |
|
} |
|
static int udp_set_url(struct sockaddr_storage *addr, |
|
const char *hostname, int port) |
|
{ |
|
struct addrinfo *res0; |
|
int addr_len; |
|
|
|
res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); |
|
if (!res0) return AVERROR(EIO); |
|
memcpy(addr, res0->ai_addr, res0->ai_addrlen); |
|
addr_len = res0->ai_addrlen; |
|
freeaddrinfo(res0); |
|
|
|
return addr_len; |
|
} |
|
|
|
static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, |
|
socklen_t *addr_len, const char *localaddr) |
|
{ |
|
int udp_fd = -1; |
|
struct addrinfo *res0, *res; |
|
int family = AF_UNSPEC; |
|
|
|
if (((struct sockaddr *) &s->dest_addr)->sa_family) |
|
family = ((struct sockaddr *) &s->dest_addr)->sa_family; |
|
res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port, |
|
SOCK_DGRAM, family, AI_PASSIVE); |
|
if (!res0) |
|
goto fail; |
|
for (res = res0; res; res=res->ai_next) { |
|
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); |
|
if (udp_fd != -1) break; |
|
log_net_error(NULL, AV_LOG_ERROR, "socket"); |
|
} |
|
|
|
if (udp_fd < 0) |
|
goto fail; |
|
|
|
memcpy(addr, res->ai_addr, res->ai_addrlen); |
|
*addr_len = res->ai_addrlen; |
|
|
|
freeaddrinfo(res0); |
|
|
|
return udp_fd; |
|
|
|
fail: |
|
if (udp_fd >= 0) |
|
closesocket(udp_fd); |
|
if(res0) |
|
freeaddrinfo(res0); |
|
return -1; |
|
} |
|
|
|
static int udp_port(struct sockaddr_storage *addr, int addr_len) |
|
{ |
|
char sbuf[sizeof(int)*3+1]; |
|
int error; |
|
|
|
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)); |
|
return -1; |
|
} |
|
|
|
return strtol(sbuf, NULL, 10); |
|
} |
|
|
|
|
|
/** |
|
* 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...] |
|
* option: 'ttl=n' : set the ttl value (for multicast only) |
|
* 'localport=n' : set the local port |
|
* 'pkt_size=n' : set max packet size |
|
* 'reuse=1' : enable reusing the socket |
|
* 'overrun_nonfatal=1': survive in case of circular buffer overrun |
|
* |
|
* @param h media file context |
|
* @param uri of the remote server |
|
* @return zero if no error. |
|
*/ |
|
int ff_udp_set_remote_url(URLContext *h, const char *uri) |
|
{ |
|
UDPContext *s = h->priv_data; |
|
char hostname[256], buf[10]; |
|
int port; |
|
const char *p; |
|
|
|
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); |
|
|
|
/* set the destination address */ |
|
s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port); |
|
if (s->dest_addr_len < 0) { |
|
return AVERROR(EIO); |
|
} |
|
s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr); |
|
p = strchr(uri, '?'); |
|
if (p) { |
|
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { |
|
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; |
|
log_net_error(h, AV_LOG_ERROR, "connect"); |
|
return AVERROR(EIO); |
|
} |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* Return the local port used by the UDP connection |
|
* @param h media file context |
|
* @return the local port number |
|
*/ |
|
int ff_udp_get_local_port(URLContext *h) |
|
{ |
|
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 |
|
*/ |
|
static int udp_get_file_handle(URLContext *h) |
|
{ |
|
UDPContext *s = h->priv_data; |
|
return s->udp_fd; |
|
} |
|
|
|
#if HAVE_PTHREAD_CANCEL |
|
static void *circular_buffer_task( void *_URLContext) |
|
{ |
|
URLContext *h = _URLContext; |
|
UDPContext *s = h->priv_data; |
|
int old_cancelstate; |
|
|
|
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); |
|
pthread_mutex_lock(&s->mutex); |
|
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; |
|
} |
|
while(1) { |
|
int len; |
|
|
|
pthread_mutex_unlock(&s->mutex); |
|
/* Blocking operations are always cancellation points; |
|
see "General Information" / "Thread Cancelation Overview" |
|
in Single Unix. */ |
|
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); |
|
len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0); |
|
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); |
|
pthread_mutex_lock(&s->mutex); |
|
if (len < 0) { |
|
if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) { |
|
s->circular_buffer_error = ff_neterrno(); |
|
goto end; |
|
} |
|
continue; |
|
} |
|
AV_WL32(s->tmp, len); |
|
|
|
if(av_fifo_space(s->fifo) < len + 4) { |
|
/* 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; |
|
} |
|
} |
|
av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL); |
|
pthread_cond_signal(&s->cond); |
|
} |
|
|
|
end: |
|
pthread_cond_signal(&s->cond); |
|
pthread_mutex_unlock(&s->mutex); |
|
return NULL; |
|
} |
|
#endif |
|
|
|
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; |
|
} |
|
|
|
/* put it in UDP context */ |
|
/* return non zero if error */ |
|
static int udp_open(URLContext *h, const char *uri, int flags) |
|
{ |
|
char hostname[1024], localaddr[1024] = ""; |
|
int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1; |
|
UDPContext *s = h->priv_data; |
|
int is_output; |
|
const char *p; |
|
char buf[256]; |
|
struct sockaddr_storage my_addr; |
|
socklen_t len; |
|
int reuse_specified = 0; |
|
int i, num_include_sources = 0, num_exclude_sources = 0; |
|
char *include_sources[32], *exclude_sources[32]; |
|
|
|
h->is_streamed = 1; |
|
|
|
is_output = !(flags & AVIO_FLAG_READ); |
|
if (!s->buffer_size) /* if not set explicitly */ |
|
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; |
|
|
|
p = strchr(uri, '?'); |
|
if (p) { |
|
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) { |
|
char *endptr = NULL; |
|
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; |
|
reuse_specified = 1; |
|
} |
|
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; |
|
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"); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) { |
|
s->ttl = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) { |
|
s->udplite_coverage = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "localport", p)) { |
|
s->local_port = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { |
|
s->packet_size = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) { |
|
s->buffer_size = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { |
|
s->is_connected = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) { |
|
dscp = strtol(buf, NULL, 10); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { |
|
s->circular_buffer_size = strtol(buf, NULL, 10); |
|
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"); |
|
} |
|
if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) { |
|
av_strlcpy(localaddr, buf, sizeof(localaddr)); |
|
} |
|
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; |
|
} |
|
if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p)) |
|
s->timeout = strtol(buf, NULL, 10); |
|
if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p)) |
|
s->is_broadcast = strtol(buf, NULL, 10); |
|
} |
|
/* handling needed to support options picking from both AVOption and URL */ |
|
s->circular_buffer_size *= 188; |
|
if (flags & AVIO_FLAG_WRITE) { |
|
h->max_packet_size = s->packet_size; |
|
} else { |
|
h->max_packet_size = UDP_MAX_PKT_SIZE; |
|
} |
|
h->rw_timeout = s->timeout; |
|
|
|
/* fill the dest addr */ |
|
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); |
|
|
|
/* XXX: fix av_url_split */ |
|
if (hostname[0] == '\0' || hostname[0] == '?') { |
|
/* only accepts null hostname if input */ |
|
if (!(flags & AVIO_FLAG_READ)) |
|
goto fail; |
|
} else { |
|
if (ff_udp_set_remote_url(h, uri) < 0) |
|
goto fail; |
|
} |
|
|
|
if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ)) |
|
s->local_port = port; |
|
udp_fd = udp_socket_create(s, &my_addr, &len, localaddr[0] ? localaddr : s->local_addr); |
|
if (udp_fd < 0) |
|
goto fail; |
|
|
|
s->local_addr_storage=my_addr; //store for future multicast join |
|
|
|
/* Follow the requested reuse option, unless it's multicast in which |
|
* case enable reuse unless explicitly disabled. |
|
*/ |
|
if (s->reuse_socket || (s->is_multicast && !reuse_specified)) { |
|
s->reuse_socket = 1; |
|
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) |
|
goto fail; |
|
} |
|
|
|
if (s->is_broadcast) { |
|
#ifdef SO_BROADCAST |
|
if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0) |
|
#endif |
|
goto fail; |
|
} |
|
|
|
/* 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"); |
|
} |
|
|
|
if (dscp >= 0) { |
|
dscp <<= 2; |
|
if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) |
|
goto fail; |
|
} |
|
|
|
/* If multicast, try binding the multicast address first, to avoid |
|
* receiving UDP packets from other sources aimed at the same UDP |
|
* 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)) { |
|
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 */ |
|
/* the bind is needed to give a port to the socket now */ |
|
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) { |
|
log_net_error(h, AV_LOG_ERROR, "bind failed"); |
|
goto fail; |
|
} |
|
|
|
len = sizeof(my_addr); |
|
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len); |
|
s->local_port = udp_port(&my_addr, len); |
|
|
|
if (s->is_multicast) { |
|
if (h->flags & AVIO_FLAG_WRITE) { |
|
/* output */ |
|
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) |
|
goto fail; |
|
} |
|
if (h->flags & AVIO_FLAG_READ) { |
|
/* input */ |
|
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 { |
|
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0) |
|
goto fail; |
|
} |
|
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) |
|
goto fail; |
|
} |
|
} |
|
} |
|
|
|
if (is_output) { |
|
/* limit the tx buf size to limit latency */ |
|
tmp = s->buffer_size; |
|
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { |
|
log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)"); |
|
goto fail; |
|
} |
|
} else { |
|
/* set udp recv buffer size to the requested value (default 64K) */ |
|
tmp = s->buffer_size; |
|
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) { |
|
log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)"); |
|
} |
|
len = sizeof(tmp); |
|
if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) { |
|
log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)"); |
|
} else { |
|
av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp); |
|
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); |
|
} |
|
|
|
/* make the socket non-blocking */ |
|
ff_socket_nonblock(udp_fd, 1); |
|
} |
|
if (s->is_connected) { |
|
if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { |
|
log_net_error(h, AV_LOG_ERROR, "connect"); |
|
goto fail; |
|
} |
|
} |
|
|
|
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]); |
|
|
|
s->udp_fd = udp_fd; |
|
|
|
#if HAVE_PTHREAD_CANCEL |
|
if (!is_output && s->circular_buffer_size) { |
|
int ret; |
|
|
|
/* start the task going */ |
|
s->fifo = av_fifo_alloc(s->circular_buffer_size); |
|
ret = pthread_mutex_init(&s->mutex, NULL); |
|
if (ret != 0) { |
|
av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret)); |
|
goto fail; |
|
} |
|
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; |
|
} |
|
#endif |
|
|
|
return 0; |
|
#if HAVE_PTHREAD_CANCEL |
|
thread_fail: |
|
pthread_cond_destroy(&s->cond); |
|
cond_fail: |
|
pthread_mutex_destroy(&s->mutex); |
|
#endif |
|
fail: |
|
if (udp_fd >= 0) |
|
closesocket(udp_fd); |
|
av_fifo_freep(&s->fifo); |
|
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]); |
|
return AVERROR(EIO); |
|
} |
|
|
|
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); |
|
} |
|
|
|
static int udp_read(URLContext *h, uint8_t *buf, int size) |
|
{ |
|
UDPContext *s = h->priv_data; |
|
int ret; |
|
#if HAVE_PTHREAD_CANCEL |
|
int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK; |
|
|
|
if (s->fifo) { |
|
pthread_mutex_lock(&s->mutex); |
|
do { |
|
avail = av_fifo_size(s->fifo); |
|
if (avail) { // >=size) { |
|
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; |
|
} |
|
|
|
av_fifo_generic_read(s->fifo, buf, avail, NULL); |
|
av_fifo_drain(s->fifo, AV_RL32(tmp) - avail); |
|
pthread_mutex_unlock(&s->mutex); |
|
return avail; |
|
} else if(s->circular_buffer_error){ |
|
int err = s->circular_buffer_error; |
|
pthread_mutex_unlock(&s->mutex); |
|
return err; |
|
} else if(nonblock) { |
|
pthread_mutex_unlock(&s->mutex); |
|
return AVERROR(EAGAIN); |
|
} |
|
else { |
|
/* 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 }; |
|
if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) { |
|
pthread_mutex_unlock(&s->mutex); |
|
return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno); |
|
} |
|
nonblock = 1; |
|
} |
|
} while( 1); |
|
} |
|
#endif |
|
|
|
if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
|
ret = ff_network_wait_fd(s->udp_fd, 0); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
ret = recv(s->udp_fd, buf, size, 0); |
|
|
|
return ret < 0 ? ff_neterrno() : ret; |
|
} |
|
|
|
static int udp_write(URLContext *h, const uint8_t *buf, int size) |
|
{ |
|
UDPContext *s = h->priv_data; |
|
int ret; |
|
|
|
if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
|
ret = ff_network_wait_fd(s->udp_fd, 1); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
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; |
|
} |
|
|
|
static int udp_close(URLContext *h) |
|
{ |
|
UDPContext *s = h->priv_data; |
|
|
|
if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) |
|
udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage); |
|
closesocket(s->udp_fd); |
|
#if HAVE_PTHREAD_CANCEL |
|
if (s->thread_started) { |
|
int ret; |
|
pthread_cancel(s->circular_buffer_thread); |
|
ret = pthread_join(s->circular_buffer_thread, NULL); |
|
if (ret != 0) |
|
av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret)); |
|
pthread_mutex_destroy(&s->mutex); |
|
pthread_cond_destroy(&s->cond); |
|
} |
|
#endif |
|
av_fifo_freep(&s->fifo); |
|
return 0; |
|
} |
|
|
|
URLProtocol ff_udp_protocol = { |
|
.name = "udp", |
|
.url_open = udp_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 = &udp_context_class, |
|
.flags = URL_PROTOCOL_FLAG_NETWORK, |
|
}; |
|
|
|
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, |
|
};
|
|
|