forked from KolibriOS/kolibrios
868 lines
30 KiB
C
868 lines
30 KiB
C
/*
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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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* @file
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* UDP protocol
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*/
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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"
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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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#if HAVE_PTHREAD_CANCEL
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#include <pthread.h>
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#endif
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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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#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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#define UDP_TX_BUF_SIZE 32768
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#define UDP_MAX_PKT_SIZE 65536
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typedef struct {
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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 buffer_size;
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int is_multicast;
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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 */
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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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} UDPContext;
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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", "Socket 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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{"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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{"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", "Should connect() 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", "In read mode: if no data arrived in more than this time interval, raise error", 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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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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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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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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static int udp_join_multicast_group(int sockfd, struct sockaddr *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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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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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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static int udp_leave_multicast_group(int sockfd, struct sockaddr *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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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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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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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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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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return res;
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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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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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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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}
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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,
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"Setting multicast sources only supported for IPv4\n");
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return AVERROR(EINVAL);
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}
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for (i = 0; i < nb_sources; i++) {
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struct ip_mreq_source mreqs;
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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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if (sourceaddr->ai_addr->sa_family != AF_INET) {
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freeaddrinfo(sourceaddr);
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av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n",
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sources[i]);
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return AVERROR(EINVAL);
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}
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mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
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mreqs.imr_interface.s_addr = INADDR_ANY;
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mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr;
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freeaddrinfo(sourceaddr);
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if (setsockopt(sockfd, IPPROTO_IP,
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include ? IP_ADD_SOURCE_MEMBERSHIP : IP_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(IP_ADD_SOURCE_MEMBERSHIP)");
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else
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log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
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return ff_neterrno();
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}
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}
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#else
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return AVERROR(ENOSYS);
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#endif
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return 0;
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}
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static int udp_set_url(struct sockaddr_storage *addr,
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const char *hostname, int port)
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{
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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 == 0) return AVERROR(EIO);
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memcpy(addr, res0->ai_addr, res0->ai_addrlen);
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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 = NULL, *res = NULL;
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int family = AF_UNSPEC;
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if (((struct sockaddr *) &s->dest_addr)->sa_family)
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family = ((struct sockaddr *) &s->dest_addr)->sa_family;
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res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port,
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SOCK_DGRAM, family, AI_PASSIVE);
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if (res0 == 0)
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goto fail;
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for (res = res0; res; res=res->ai_next) {
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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);
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*addr_len = res->ai_addrlen;
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freeaddrinfo(res0);
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return udp_fd;
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fail:
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if (udp_fd >= 0)
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closesocket(udp_fd);
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if(res0)
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freeaddrinfo(res0);
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return -1;
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}
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static int udp_port(struct sockaddr_storage *addr, int addr_len)
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{
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char sbuf[sizeof(int)*3+1];
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int error;
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if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
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av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
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return -1;
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}
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return strtol(sbuf, NULL, 10);
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}
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|
|
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/**
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* If no filename is given to av_open_input_file because you want to
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* get the local port first, then you must call this function to set
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* the remote server address.
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*
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* url syntax: udp://host:port[?option=val...]
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* option: 'ttl=n' : set the ttl value (for multicast only)
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* 'localport=n' : set the local port
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* 'pkt_size=n' : set max packet size
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* 'reuse=1' : enable reusing the socket
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* 'overrun_nonfatal=1': survive in case of circular buffer overrun
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*
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* @param h media file context
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* @param uri of the remote server
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* @return zero if no error.
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*/
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int ff_udp_set_remote_url(URLContext *h, const char *uri)
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{
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UDPContext *s = h->priv_data;
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char hostname[256], buf[10];
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int port;
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const char *p;
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av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
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/* set the destination address */
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s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
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if (s->dest_addr_len < 0) {
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return AVERROR(EIO);
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}
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s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
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p = strchr(uri, '?');
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if (p) {
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if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
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int was_connected = s->is_connected;
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s->is_connected = strtol(buf, NULL, 10);
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if (s->is_connected && !was_connected) {
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if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
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s->dest_addr_len)) {
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s->is_connected = 0;
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log_net_error(h, AV_LOG_ERROR, "connect");
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return AVERROR(EIO);
|
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}
|
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}
|
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}
|
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}
|
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|
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return 0;
|
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}
|
|
|
|
/**
|
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* Return the local port used by the UDP connection
|
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* @param h media file context
|
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* @return the local port number
|
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*/
|
|
int ff_udp_get_local_port(URLContext *h)
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{
|
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UDPContext *s = h->priv_data;
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return s->local_port;
|
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}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
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UDPContext *s = h->priv_data;
|
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return s->udp_fd;
|
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}
|
|
|
|
#if HAVE_PTHREAD_CANCEL
|
|
static void *circular_buffer_task( void *_URLContext)
|
|
{
|
|
URLContext *h = _URLContext;
|
|
UDPContext *s = h->priv_data;
|
|
int old_cancelstate;
|
|
|
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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;
|
|
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), "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), "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);
|
|
}
|
|
/* 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;
|
|
|
|
/* 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 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) < 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 largest possible udp packet size to
|
|
* avoid losing data on OSes that set this too low by default. */
|
|
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)");
|
|
}
|
|
/* 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_free(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 udp_read(URLContext *h, uint8_t *buf, int size)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
int ret;
|
|
int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
|
|
|
|
#if HAVE_PTHREAD_CANCEL
|
|
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;
|
|
int ret;
|
|
|
|
if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
|
|
udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
|
|
closesocket(s->udp_fd);
|
|
#if HAVE_PTHREAD_CANCEL
|
|
if (s->thread_started) {
|
|
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_free(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,
|
|
};
|