diff options
Diffstat (limited to 'ffmpeg/libavformat/udp.c')
| -rw-r--r-- | ffmpeg/libavformat/udp.c | 876 |
1 files changed, 0 insertions, 876 deletions
diff --git a/ffmpeg/libavformat/udp.c b/ffmpeg/libavformat/udp.c deleted file mode 100644 index 047ff7c..0000000 --- a/ffmpeg/libavformat/udp.c +++ /dev/null @@ -1,876 +0,0 @@ -/* - * UDP prototype streaming system - * Copyright (c) 2000, 2001, 2002 Fabrice Bellard - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * UDP protocol - */ - -#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */ - -#include "avformat.h" -#include "avio_internal.h" -#include "libavutil/parseutils.h" -#include "libavutil/fifo.h" -#include "libavutil/intreadwrite.h" -#include "libavutil/avstring.h" -#include "libavutil/opt.h" -#include "libavutil/log.h" -#include "libavutil/time.h" -#include "internal.h" -#include "network.h" -#include "os_support.h" -#include "url.h" - -#if HAVE_PTHREAD_CANCEL -#include <pthread.h> -#endif - -#ifndef HAVE_PTHREAD_CANCEL -#define HAVE_PTHREAD_CANCEL 0 -#endif - -#ifndef IPV6_ADD_MEMBERSHIP -#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP -#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP -#endif - -#define UDP_TX_BUF_SIZE 32768 -#define UDP_MAX_PKT_SIZE 65536 - -typedef struct { - const AVClass *class; - int udp_fd; - int ttl; - int buffer_size; - int is_multicast; - int local_port; - int reuse_socket; - int overrun_nonfatal; - struct sockaddr_storage dest_addr; - int dest_addr_len; - int is_connected; - - /* Circular Buffer variables for use in UDP receive code */ - int circular_buffer_size; - AVFifoBuffer *fifo; - int circular_buffer_error; -#if HAVE_PTHREAD_CANCEL - pthread_t circular_buffer_thread; - pthread_mutex_t mutex; - pthread_cond_t cond; - int thread_started; -#endif - uint8_t tmp[UDP_MAX_PKT_SIZE+4]; - int remaining_in_dg; - char *local_addr; - int packet_size; - int timeout; - struct sockaddr_storage local_addr_storage; -} UDPContext; - -#define OFFSET(x) offsetof(UDPContext, x) -#define D AV_OPT_FLAG_DECODING_PARAM -#define E AV_OPT_FLAG_ENCODING_PARAM -static const AVOption options[] = { -{"buffer_size", "set packet buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, -{"localport", "set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, -{"localaddr", "choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, D|E }, -{"pkt_size", "set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E }, -{"reuse", "explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, -{"ttl", "set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E }, -{"connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, -/* TODO 'sources', 'block' option */ -{"fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D }, -{"overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D }, -{"timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D }, -{NULL} -}; - -static const AVClass udp_context_class = { - .class_name = "udp", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, -}; - -static void log_net_error(void *ctx, int level, const char* prefix) -{ - char errbuf[100]; - av_strerror(ff_neterrno(), errbuf, sizeof(errbuf)); - av_log(ctx, level, "%s: %s\n", prefix, errbuf); -} - -static int udp_set_multicast_ttl(int sockfd, int mcastTTL, - struct sockaddr *addr) -{ -#ifdef IP_MULTICAST_TTL - if (addr->sa_family == AF_INET) { - if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) { - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)"); - return -1; - } - } -#endif -#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS) - if (addr->sa_family == AF_INET6) { - if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) { - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)"); - return -1; - } - } -#endif - return 0; -} - -static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr) -{ -#ifdef IP_ADD_MEMBERSHIP - if (addr->sa_family == AF_INET) { - struct ip_mreq mreq; - - mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; - if (local_addr) - mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr; - else - mreq.imr_interface.s_addr= INADDR_ANY; - if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)"); - return -1; - } - } -#endif -#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) - if (addr->sa_family == AF_INET6) { - struct ipv6_mreq mreq6; - - memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); - mreq6.ipv6mr_interface= 0; - if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)"); - return -1; - } - } -#endif - return 0; -} - -static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr) -{ -#ifdef IP_DROP_MEMBERSHIP - if (addr->sa_family == AF_INET) { - struct ip_mreq mreq; - - mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; - if (local_addr) - mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr; - else - mreq.imr_interface.s_addr= INADDR_ANY; - if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)"); - return -1; - } - } -#endif -#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) - if (addr->sa_family == AF_INET6) { - struct ipv6_mreq mreq6; - - memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); - mreq6.ipv6mr_interface= 0; - if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)"); - return -1; - } - } -#endif - return 0; -} - -static struct addrinfo* udp_resolve_host(const char *hostname, int port, - int type, int family, int flags) -{ - struct addrinfo hints = { 0 }, *res = 0; - int error; - char sport[16]; - const char *node = 0, *service = "0"; - - if (port > 0) { - snprintf(sport, sizeof(sport), "%d", port); - service = sport; - } - if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { - node = hostname; - } - hints.ai_socktype = type; - hints.ai_family = family; - hints.ai_flags = flags; - if ((error = getaddrinfo(node, service, &hints, &res))) { - res = NULL; - av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error)); - } - - return res; -} - -static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr, - int addr_len, char **sources, - int nb_sources, int include) -{ -#if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32) - /* These ones are available in the microsoft SDK, but don't seem to work - * as on linux, so just prefer the v4-only approach there for now. */ - int i; - for (i = 0; i < nb_sources; i++) { - struct group_source_req mreqs; - int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; - struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, - SOCK_DGRAM, AF_UNSPEC, - 0); - if (!sourceaddr) - return AVERROR(ENOENT); - - mreqs.gsr_interface = 0; - memcpy(&mreqs.gsr_group, addr, addr_len); - memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen); - freeaddrinfo(sourceaddr); - - if (setsockopt(sockfd, level, - include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE, - (const void *)&mreqs, sizeof(mreqs)) < 0) { - if (include) - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)"); - else - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)"); - return ff_neterrno(); - } - } -#elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE) - int i; - if (addr->sa_family != AF_INET) { - av_log(NULL, AV_LOG_ERROR, - "Setting multicast sources only supported for IPv4\n"); - return AVERROR(EINVAL); - } - for (i = 0; i < nb_sources; i++) { - struct ip_mreq_source mreqs; - struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, - SOCK_DGRAM, AF_UNSPEC, - 0); - if (!sourceaddr) - return AVERROR(ENOENT); - if (sourceaddr->ai_addr->sa_family != AF_INET) { - freeaddrinfo(sourceaddr); - av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n", - sources[i]); - return AVERROR(EINVAL); - } - - mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; - mreqs.imr_interface.s_addr = INADDR_ANY; - mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr; - freeaddrinfo(sourceaddr); - - if (setsockopt(sockfd, IPPROTO_IP, - include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE, - (const void *)&mreqs, sizeof(mreqs)) < 0) { - if (include) - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)"); - else - log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)"); - return ff_neterrno(); - } - } -#else - return AVERROR(ENOSYS); -#endif - return 0; -} -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 == 0) 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 = NULL, *res = NULL; - 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 == 0) - goto fail; - for (res = res0; res; res=res->ai_next) { - 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; - 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; - - 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 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 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,(struct sockaddr *)&s->local_addr_storage); - 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, -}; |