yading@11: /* yading@11: * UDP prototype streaming system yading@11: * Copyright (c) 2000, 2001, 2002 Fabrice Bellard yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: /** yading@11: * @file yading@11: * UDP protocol yading@11: */ yading@11: yading@11: #define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */ yading@11: yading@11: #include "avformat.h" yading@11: #include "avio_internal.h" yading@11: #include "libavutil/parseutils.h" yading@11: #include "libavutil/fifo.h" yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "libavutil/avstring.h" yading@11: #include "libavutil/opt.h" yading@11: #include "libavutil/log.h" yading@11: #include "libavutil/time.h" yading@11: #include "internal.h" yading@11: #include "network.h" yading@11: #include "os_support.h" yading@11: #include "url.h" yading@11: yading@11: #if HAVE_PTHREAD_CANCEL yading@11: #include yading@11: #endif yading@11: yading@11: #ifndef HAVE_PTHREAD_CANCEL yading@11: #define HAVE_PTHREAD_CANCEL 0 yading@11: #endif yading@11: yading@11: #ifndef IPV6_ADD_MEMBERSHIP yading@11: #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP yading@11: #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP yading@11: #endif yading@11: yading@11: #define UDP_TX_BUF_SIZE 32768 yading@11: #define UDP_MAX_PKT_SIZE 65536 yading@11: yading@11: typedef struct { yading@11: const AVClass *class; yading@11: int udp_fd; yading@11: int ttl; yading@11: int buffer_size; yading@11: int is_multicast; yading@11: int local_port; yading@11: int reuse_socket; yading@11: int overrun_nonfatal; yading@11: struct sockaddr_storage dest_addr; yading@11: int dest_addr_len; yading@11: int is_connected; yading@11: yading@11: /* Circular Buffer variables for use in UDP receive code */ yading@11: int circular_buffer_size; yading@11: AVFifoBuffer *fifo; yading@11: int circular_buffer_error; yading@11: #if HAVE_PTHREAD_CANCEL yading@11: pthread_t circular_buffer_thread; yading@11: pthread_mutex_t mutex; yading@11: pthread_cond_t cond; yading@11: int thread_started; yading@11: #endif yading@11: uint8_t tmp[UDP_MAX_PKT_SIZE+4]; yading@11: int remaining_in_dg; yading@11: char *local_addr; yading@11: int packet_size; yading@11: int timeout; yading@11: } UDPContext; yading@11: yading@11: #define OFFSET(x) offsetof(UDPContext, x) yading@11: #define D AV_OPT_FLAG_DECODING_PARAM yading@11: #define E AV_OPT_FLAG_ENCODING_PARAM yading@11: static const AVOption options[] = { yading@11: {"buffer_size", "Socket buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, yading@11: {"localport", "Set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, yading@11: {"localaddr", "Choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, D|E }, yading@11: {"pkt_size", "Set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E }, yading@11: {"reuse", "Explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, yading@11: {"ttl", "Set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E }, yading@11: {"connect", "Should connect() be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, yading@11: /* TODO 'sources', 'block' option */ yading@11: {"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 }, yading@11: {"overrun_nonfatal", "Survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D }, yading@11: {"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 }, yading@11: {NULL} yading@11: }; yading@11: yading@11: static const AVClass udp_context_class = { yading@11: .class_name = "udp", yading@11: .item_name = av_default_item_name, yading@11: .option = options, yading@11: .version = LIBAVUTIL_VERSION_INT, yading@11: }; yading@11: yading@11: static void log_net_error(void *ctx, int level, const char* prefix) yading@11: { yading@11: char errbuf[100]; yading@11: av_strerror(ff_neterrno(), errbuf, sizeof(errbuf)); yading@11: av_log(ctx, level, "%s: %s\n", prefix, errbuf); yading@11: } yading@11: yading@11: static int udp_set_multicast_ttl(int sockfd, int mcastTTL, yading@11: struct sockaddr *addr) yading@11: { yading@11: #ifdef IP_MULTICAST_TTL yading@11: if (addr->sa_family == AF_INET) { yading@11: if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) { yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)"); yading@11: return -1; yading@11: } yading@11: } yading@11: #endif yading@11: #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS) yading@11: if (addr->sa_family == AF_INET6) { yading@11: if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) { yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)"); yading@11: return -1; yading@11: } yading@11: } yading@11: #endif yading@11: return 0; yading@11: } yading@11: yading@11: static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) yading@11: { yading@11: #ifdef IP_ADD_MEMBERSHIP yading@11: if (addr->sa_family == AF_INET) { yading@11: struct ip_mreq mreq; yading@11: yading@11: mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; yading@11: mreq.imr_interface.s_addr= INADDR_ANY; yading@11: if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)"); yading@11: return -1; yading@11: } yading@11: } yading@11: #endif yading@11: #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) yading@11: if (addr->sa_family == AF_INET6) { yading@11: struct ipv6_mreq mreq6; yading@11: yading@11: memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); yading@11: mreq6.ipv6mr_interface= 0; yading@11: if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)"); yading@11: return -1; yading@11: } yading@11: } yading@11: #endif yading@11: return 0; yading@11: } yading@11: yading@11: static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) yading@11: { yading@11: #ifdef IP_DROP_MEMBERSHIP yading@11: if (addr->sa_family == AF_INET) { yading@11: struct ip_mreq mreq; yading@11: yading@11: mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; yading@11: mreq.imr_interface.s_addr= INADDR_ANY; yading@11: if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)"); yading@11: return -1; yading@11: } yading@11: } yading@11: #endif yading@11: #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) yading@11: if (addr->sa_family == AF_INET6) { yading@11: struct ipv6_mreq mreq6; yading@11: yading@11: memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); yading@11: mreq6.ipv6mr_interface= 0; yading@11: if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)"); yading@11: return -1; yading@11: } yading@11: } yading@11: #endif yading@11: return 0; yading@11: } yading@11: yading@11: static struct addrinfo* udp_resolve_host(const char *hostname, int port, yading@11: int type, int family, int flags) yading@11: { yading@11: struct addrinfo hints = { 0 }, *res = 0; yading@11: int error; yading@11: char sport[16]; yading@11: const char *node = 0, *service = "0"; yading@11: yading@11: if (port > 0) { yading@11: snprintf(sport, sizeof(sport), "%d", port); yading@11: service = sport; yading@11: } yading@11: if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { yading@11: node = hostname; yading@11: } yading@11: hints.ai_socktype = type; yading@11: hints.ai_family = family; yading@11: hints.ai_flags = flags; yading@11: if ((error = getaddrinfo(node, service, &hints, &res))) { yading@11: res = NULL; yading@11: av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error)); yading@11: } yading@11: yading@11: return res; yading@11: } yading@11: yading@11: static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr, yading@11: int addr_len, char **sources, yading@11: int nb_sources, int include) yading@11: { yading@11: #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32) yading@11: /* These ones are available in the microsoft SDK, but don't seem to work yading@11: * as on linux, so just prefer the v4-only approach there for now. */ yading@11: int i; yading@11: for (i = 0; i < nb_sources; i++) { yading@11: struct group_source_req mreqs; yading@11: int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; yading@11: struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, yading@11: SOCK_DGRAM, AF_UNSPEC, yading@11: AI_NUMERICHOST); yading@11: if (!sourceaddr) yading@11: return AVERROR(ENOENT); yading@11: yading@11: mreqs.gsr_interface = 0; yading@11: memcpy(&mreqs.gsr_group, addr, addr_len); yading@11: memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen); yading@11: freeaddrinfo(sourceaddr); yading@11: yading@11: if (setsockopt(sockfd, level, yading@11: include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE, yading@11: (const void *)&mreqs, sizeof(mreqs)) < 0) { yading@11: if (include) yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)"); yading@11: else yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)"); yading@11: return ff_neterrno(); yading@11: } yading@11: } yading@11: #elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE) yading@11: int i; yading@11: if (addr->sa_family != AF_INET) { yading@11: av_log(NULL, AV_LOG_ERROR, yading@11: "Setting multicast sources only supported for IPv4\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: for (i = 0; i < nb_sources; i++) { yading@11: struct ip_mreq_source mreqs; yading@11: struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, yading@11: SOCK_DGRAM, AF_UNSPEC, yading@11: AI_NUMERICHOST); yading@11: if (!sourceaddr) yading@11: return AVERROR(ENOENT); yading@11: if (sourceaddr->ai_addr->sa_family != AF_INET) { yading@11: freeaddrinfo(sourceaddr); yading@11: av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n", yading@11: sources[i]); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; yading@11: mreqs.imr_interface.s_addr = INADDR_ANY; yading@11: mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr; yading@11: freeaddrinfo(sourceaddr); yading@11: yading@11: if (setsockopt(sockfd, IPPROTO_IP, yading@11: include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE, yading@11: (const void *)&mreqs, sizeof(mreqs)) < 0) { yading@11: if (include) yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)"); yading@11: else yading@11: log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)"); yading@11: return ff_neterrno(); yading@11: } yading@11: } yading@11: #else yading@11: return AVERROR(ENOSYS); yading@11: #endif yading@11: return 0; yading@11: } yading@11: static int udp_set_url(struct sockaddr_storage *addr, yading@11: const char *hostname, int port) yading@11: { yading@11: struct addrinfo *res0; yading@11: int addr_len; yading@11: yading@11: res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); yading@11: if (res0 == 0) return AVERROR(EIO); yading@11: memcpy(addr, res0->ai_addr, res0->ai_addrlen); yading@11: addr_len = res0->ai_addrlen; yading@11: freeaddrinfo(res0); yading@11: yading@11: return addr_len; yading@11: } yading@11: yading@11: static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, yading@11: socklen_t *addr_len, const char *localaddr) yading@11: { yading@11: int udp_fd = -1; yading@11: struct addrinfo *res0 = NULL, *res = NULL; yading@11: int family = AF_UNSPEC; yading@11: yading@11: if (((struct sockaddr *) &s->dest_addr)->sa_family) yading@11: family = ((struct sockaddr *) &s->dest_addr)->sa_family; yading@11: res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port, yading@11: SOCK_DGRAM, family, AI_PASSIVE); yading@11: if (res0 == 0) yading@11: goto fail; yading@11: for (res = res0; res; res=res->ai_next) { yading@11: udp_fd = socket(res->ai_family, SOCK_DGRAM, 0); yading@11: if (udp_fd != -1) break; yading@11: log_net_error(NULL, AV_LOG_ERROR, "socket"); yading@11: } yading@11: yading@11: if (udp_fd < 0) yading@11: goto fail; yading@11: yading@11: memcpy(addr, res->ai_addr, res->ai_addrlen); yading@11: *addr_len = res->ai_addrlen; yading@11: yading@11: freeaddrinfo(res0); yading@11: yading@11: return udp_fd; yading@11: yading@11: fail: yading@11: if (udp_fd >= 0) yading@11: closesocket(udp_fd); yading@11: if(res0) yading@11: freeaddrinfo(res0); yading@11: return -1; yading@11: } yading@11: yading@11: static int udp_port(struct sockaddr_storage *addr, int addr_len) yading@11: { yading@11: char sbuf[sizeof(int)*3+1]; yading@11: int error; yading@11: yading@11: if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) { yading@11: av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error)); yading@11: return -1; yading@11: } yading@11: yading@11: return strtol(sbuf, NULL, 10); yading@11: } yading@11: yading@11: yading@11: /** yading@11: * If no filename is given to av_open_input_file because you want to yading@11: * get the local port first, then you must call this function to set yading@11: * the remote server address. yading@11: * yading@11: * url syntax: udp://host:port[?option=val...] yading@11: * option: 'ttl=n' : set the ttl value (for multicast only) yading@11: * 'localport=n' : set the local port yading@11: * 'pkt_size=n' : set max packet size yading@11: * 'reuse=1' : enable reusing the socket yading@11: * 'overrun_nonfatal=1': survive in case of circular buffer overrun yading@11: * yading@11: * @param h media file context yading@11: * @param uri of the remote server yading@11: * @return zero if no error. yading@11: */ yading@11: int ff_udp_set_remote_url(URLContext *h, const char *uri) yading@11: { yading@11: UDPContext *s = h->priv_data; yading@11: char hostname[256], buf[10]; yading@11: int port; yading@11: const char *p; yading@11: yading@11: av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); yading@11: yading@11: /* set the destination address */ yading@11: s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port); yading@11: if (s->dest_addr_len < 0) { yading@11: return AVERROR(EIO); yading@11: } yading@11: s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr); yading@11: p = strchr(uri, '?'); yading@11: if (p) { yading@11: if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { yading@11: int was_connected = s->is_connected; yading@11: s->is_connected = strtol(buf, NULL, 10); yading@11: if (s->is_connected && !was_connected) { yading@11: if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr, yading@11: s->dest_addr_len)) { yading@11: s->is_connected = 0; yading@11: log_net_error(h, AV_LOG_ERROR, "connect"); yading@11: return AVERROR(EIO); yading@11: } yading@11: } yading@11: } yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * Return the local port used by the UDP connection yading@11: * @param h media file context yading@11: * @return the local port number yading@11: */ yading@11: int ff_udp_get_local_port(URLContext *h) yading@11: { yading@11: UDPContext *s = h->priv_data; yading@11: return s->local_port; yading@11: } yading@11: yading@11: /** yading@11: * Return the udp file handle for select() usage to wait for several RTP yading@11: * streams at the same time. yading@11: * @param h media file context yading@11: */ yading@11: static int udp_get_file_handle(URLContext *h) yading@11: { yading@11: UDPContext *s = h->priv_data; yading@11: return s->udp_fd; yading@11: } yading@11: yading@11: #if HAVE_PTHREAD_CANCEL yading@11: static void *circular_buffer_task( void *_URLContext) yading@11: { yading@11: URLContext *h = _URLContext; yading@11: UDPContext *s = h->priv_data; yading@11: int old_cancelstate; yading@11: yading@11: pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); yading@11: pthread_mutex_lock(&s->mutex); yading@11: if (ff_socket_nonblock(s->udp_fd, 0) < 0) { yading@11: av_log(h, AV_LOG_ERROR, "Failed to set blocking mode"); yading@11: s->circular_buffer_error = AVERROR(EIO); yading@11: goto end; yading@11: } yading@11: while(1) { yading@11: int len; yading@11: yading@11: pthread_mutex_unlock(&s->mutex); yading@11: /* Blocking operations are always cancellation points; yading@11: see "General Information" / "Thread Cancelation Overview" yading@11: in Single Unix. */ yading@11: pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); yading@11: len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0); yading@11: pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); yading@11: pthread_mutex_lock(&s->mutex); yading@11: if (len < 0) { yading@11: if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) { yading@11: s->circular_buffer_error = ff_neterrno(); yading@11: goto end; yading@11: } yading@11: continue; yading@11: } yading@11: AV_WL32(s->tmp, len); yading@11: yading@11: if(av_fifo_space(s->fifo) < len + 4) { yading@11: /* No Space left */ yading@11: if (s->overrun_nonfatal) { yading@11: av_log(h, AV_LOG_WARNING, "Circular buffer overrun. " yading@11: "Surviving due to overrun_nonfatal option\n"); yading@11: continue; yading@11: } else { yading@11: av_log(h, AV_LOG_ERROR, "Circular buffer overrun. " yading@11: "To avoid, increase fifo_size URL option. " yading@11: "To survive in such case, use overrun_nonfatal option\n"); yading@11: s->circular_buffer_error = AVERROR(EIO); yading@11: goto end; yading@11: } yading@11: } yading@11: av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL); yading@11: pthread_cond_signal(&s->cond); yading@11: } yading@11: yading@11: end: yading@11: pthread_cond_signal(&s->cond); yading@11: pthread_mutex_unlock(&s->mutex); yading@11: return NULL; yading@11: } yading@11: #endif yading@11: yading@11: /* put it in UDP context */ yading@11: /* return non zero if error */ yading@11: static int udp_open(URLContext *h, const char *uri, int flags) yading@11: { yading@11: char hostname[1024], localaddr[1024] = ""; yading@11: int port, udp_fd = -1, tmp, bind_ret = -1; yading@11: UDPContext *s = h->priv_data; yading@11: int is_output; yading@11: const char *p; yading@11: char buf[256]; yading@11: struct sockaddr_storage my_addr; yading@11: socklen_t len; yading@11: int reuse_specified = 0; yading@11: int i, include = 0, num_sources = 0; yading@11: char *sources[32]; yading@11: yading@11: h->is_streamed = 1; yading@11: yading@11: is_output = !(flags & AVIO_FLAG_READ); yading@11: if (!s->buffer_size) /* if not set explicitly */ yading@11: s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; yading@11: yading@11: p = strchr(uri, '?'); yading@11: if (p) { yading@11: if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) { yading@11: char *endptr = NULL; yading@11: s->reuse_socket = strtol(buf, &endptr, 10); yading@11: /* assume if no digits were found it is a request to enable it */ yading@11: if (buf == endptr) yading@11: s->reuse_socket = 1; yading@11: reuse_specified = 1; yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) { yading@11: char *endptr = NULL; yading@11: s->overrun_nonfatal = strtol(buf, &endptr, 10); yading@11: /* assume if no digits were found it is a request to enable it */ yading@11: if (buf == endptr) yading@11: s->overrun_nonfatal = 1; yading@11: if (!HAVE_PTHREAD_CANCEL) yading@11: av_log(h, AV_LOG_WARNING, yading@11: "'overrun_nonfatal' option was set but it is not supported " yading@11: "on this build (pthread support is required)\n"); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) { yading@11: s->ttl = strtol(buf, NULL, 10); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "localport", p)) { yading@11: s->local_port = strtol(buf, NULL, 10); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { yading@11: s->packet_size = strtol(buf, NULL, 10); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) { yading@11: s->buffer_size = strtol(buf, NULL, 10); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { yading@11: s->is_connected = strtol(buf, NULL, 10); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { yading@11: s->circular_buffer_size = strtol(buf, NULL, 10); yading@11: if (!HAVE_PTHREAD_CANCEL) yading@11: av_log(h, AV_LOG_WARNING, yading@11: "'circular_buffer_size' option was set but it is not supported " yading@11: "on this build (pthread support is required)\n"); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) { yading@11: av_strlcpy(localaddr, buf, sizeof(localaddr)); yading@11: } yading@11: if (av_find_info_tag(buf, sizeof(buf), "sources", p)) yading@11: include = 1; yading@11: if (include || av_find_info_tag(buf, sizeof(buf), "block", p)) { yading@11: char *source_start; yading@11: yading@11: source_start = buf; yading@11: while (1) { yading@11: char *next = strchr(source_start, ','); yading@11: if (next) yading@11: *next = '\0'; yading@11: sources[num_sources] = av_strdup(source_start); yading@11: if (!sources[num_sources]) yading@11: goto fail; yading@11: source_start = next + 1; yading@11: num_sources++; yading@11: if (num_sources >= FF_ARRAY_ELEMS(sources) || !next) yading@11: break; yading@11: } yading@11: } yading@11: if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p)) yading@11: s->timeout = strtol(buf, NULL, 10); yading@11: } yading@11: /* handling needed to support options picking from both AVOption and URL */ yading@11: s->circular_buffer_size *= 188; yading@11: h->max_packet_size = s->packet_size; yading@11: h->rw_timeout = s->timeout; yading@11: yading@11: /* fill the dest addr */ yading@11: av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); yading@11: yading@11: /* XXX: fix av_url_split */ yading@11: if (hostname[0] == '\0' || hostname[0] == '?') { yading@11: /* only accepts null hostname if input */ yading@11: if (!(flags & AVIO_FLAG_READ)) yading@11: goto fail; yading@11: } else { yading@11: if (ff_udp_set_remote_url(h, uri) < 0) yading@11: goto fail; yading@11: } yading@11: yading@11: if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ)) yading@11: s->local_port = port; yading@11: udp_fd = udp_socket_create(s, &my_addr, &len, localaddr[0] ? localaddr : s->local_addr); yading@11: if (udp_fd < 0) yading@11: goto fail; yading@11: yading@11: /* Follow the requested reuse option, unless it's multicast in which yading@11: * case enable reuse unless explicitly disabled. yading@11: */ yading@11: if (s->reuse_socket || (s->is_multicast && !reuse_specified)) { yading@11: s->reuse_socket = 1; yading@11: if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) yading@11: goto fail; yading@11: } yading@11: yading@11: /* If multicast, try binding the multicast address first, to avoid yading@11: * receiving UDP packets from other sources aimed at the same UDP yading@11: * port. This fails on windows. This makes sending to the same address yading@11: * using sendto() fail, so only do it if we're opened in read-only mode. */ yading@11: if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) { yading@11: bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len); yading@11: } yading@11: /* bind to the local address if not multicast or if the multicast yading@11: * bind failed */ yading@11: /* the bind is needed to give a port to the socket now */ yading@11: if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) { yading@11: log_net_error(h, AV_LOG_ERROR, "bind failed"); yading@11: goto fail; yading@11: } yading@11: yading@11: len = sizeof(my_addr); yading@11: getsockname(udp_fd, (struct sockaddr *)&my_addr, &len); yading@11: s->local_port = udp_port(&my_addr, len); yading@11: yading@11: if (s->is_multicast) { yading@11: if (h->flags & AVIO_FLAG_WRITE) { yading@11: /* output */ yading@11: if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) yading@11: goto fail; yading@11: } yading@11: if (h->flags & AVIO_FLAG_READ) { yading@11: /* input */ yading@11: if (num_sources == 0 || !include) { yading@11: if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0) yading@11: goto fail; yading@11: yading@11: if (num_sources) { yading@11: if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, sources, num_sources, 0) < 0) yading@11: goto fail; yading@11: } yading@11: } else if (include && num_sources) { yading@11: if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, sources, num_sources, 1) < 0) yading@11: goto fail; yading@11: } else { yading@11: av_log(NULL, AV_LOG_ERROR, "invalid udp settings: inclusive multicast but no sources given\n"); yading@11: goto fail; yading@11: } yading@11: } yading@11: } yading@11: yading@11: if (is_output) { yading@11: /* limit the tx buf size to limit latency */ yading@11: tmp = s->buffer_size; yading@11: if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { yading@11: log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)"); yading@11: goto fail; yading@11: } yading@11: } else { yading@11: /* set udp recv buffer size to the largest possible udp packet size to yading@11: * avoid losing data on OSes that set this too low by default. */ yading@11: tmp = s->buffer_size; yading@11: if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) { yading@11: log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)"); yading@11: } yading@11: /* make the socket non-blocking */ yading@11: ff_socket_nonblock(udp_fd, 1); yading@11: } yading@11: if (s->is_connected) { yading@11: if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { yading@11: log_net_error(h, AV_LOG_ERROR, "connect"); yading@11: goto fail; yading@11: } yading@11: } yading@11: yading@11: for (i = 0; i < num_sources; i++) yading@11: av_freep(&sources[i]); yading@11: yading@11: s->udp_fd = udp_fd; yading@11: yading@11: #if HAVE_PTHREAD_CANCEL yading@11: if (!is_output && s->circular_buffer_size) { yading@11: int ret; yading@11: yading@11: /* start the task going */ yading@11: s->fifo = av_fifo_alloc(s->circular_buffer_size); yading@11: ret = pthread_mutex_init(&s->mutex, NULL); yading@11: if (ret != 0) { yading@11: av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret)); yading@11: goto fail; yading@11: } yading@11: ret = pthread_cond_init(&s->cond, NULL); yading@11: if (ret != 0) { yading@11: av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret)); yading@11: goto cond_fail; yading@11: } yading@11: ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h); yading@11: if (ret != 0) { yading@11: av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret)); yading@11: goto thread_fail; yading@11: } yading@11: s->thread_started = 1; yading@11: } yading@11: #endif yading@11: yading@11: return 0; yading@11: #if HAVE_PTHREAD_CANCEL yading@11: thread_fail: yading@11: pthread_cond_destroy(&s->cond); yading@11: cond_fail: yading@11: pthread_mutex_destroy(&s->mutex); yading@11: #endif yading@11: fail: yading@11: if (udp_fd >= 0) yading@11: closesocket(udp_fd); yading@11: av_fifo_free(s->fifo); yading@11: for (i = 0; i < num_sources; i++) yading@11: av_freep(&sources[i]); yading@11: return AVERROR(EIO); yading@11: } yading@11: yading@11: static int udp_read(URLContext *h, uint8_t *buf, int size) yading@11: { yading@11: UDPContext *s = h->priv_data; yading@11: int ret; yading@11: int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK; yading@11: yading@11: #if HAVE_PTHREAD_CANCEL yading@11: if (s->fifo) { yading@11: pthread_mutex_lock(&s->mutex); yading@11: do { yading@11: avail = av_fifo_size(s->fifo); yading@11: if (avail) { // >=size) { yading@11: uint8_t tmp[4]; yading@11: yading@11: av_fifo_generic_read(s->fifo, tmp, 4, NULL); yading@11: avail= AV_RL32(tmp); yading@11: if(avail > size){ yading@11: av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n"); yading@11: avail= size; yading@11: } yading@11: yading@11: av_fifo_generic_read(s->fifo, buf, avail, NULL); yading@11: av_fifo_drain(s->fifo, AV_RL32(tmp) - avail); yading@11: pthread_mutex_unlock(&s->mutex); yading@11: return avail; yading@11: } else if(s->circular_buffer_error){ yading@11: int err = s->circular_buffer_error; yading@11: pthread_mutex_unlock(&s->mutex); yading@11: return err; yading@11: } else if(nonblock) { yading@11: pthread_mutex_unlock(&s->mutex); yading@11: return AVERROR(EAGAIN); yading@11: } yading@11: else { yading@11: /* FIXME: using the monotonic clock would be better, yading@11: but it does not exist on all supported platforms. */ yading@11: int64_t t = av_gettime() + 100000; yading@11: struct timespec tv = { .tv_sec = t / 1000000, yading@11: .tv_nsec = (t % 1000000) * 1000 }; yading@11: if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) { yading@11: pthread_mutex_unlock(&s->mutex); yading@11: return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno); yading@11: } yading@11: nonblock = 1; yading@11: } yading@11: } while( 1); yading@11: } yading@11: #endif yading@11: yading@11: if (!(h->flags & AVIO_FLAG_NONBLOCK)) { yading@11: ret = ff_network_wait_fd(s->udp_fd, 0); yading@11: if (ret < 0) yading@11: return ret; yading@11: } yading@11: ret = recv(s->udp_fd, buf, size, 0); yading@11: yading@11: return ret < 0 ? ff_neterrno() : ret; yading@11: } yading@11: yading@11: static int udp_write(URLContext *h, const uint8_t *buf, int size) yading@11: { yading@11: UDPContext *s = h->priv_data; yading@11: int ret; yading@11: yading@11: if (!(h->flags & AVIO_FLAG_NONBLOCK)) { yading@11: ret = ff_network_wait_fd(s->udp_fd, 1); yading@11: if (ret < 0) yading@11: return ret; yading@11: } yading@11: yading@11: if (!s->is_connected) { yading@11: ret = sendto (s->udp_fd, buf, size, 0, yading@11: (struct sockaddr *) &s->dest_addr, yading@11: s->dest_addr_len); yading@11: } else yading@11: ret = send(s->udp_fd, buf, size, 0); yading@11: yading@11: return ret < 0 ? ff_neterrno() : ret; yading@11: } yading@11: yading@11: static int udp_close(URLContext *h) yading@11: { yading@11: UDPContext *s = h->priv_data; yading@11: int ret; yading@11: yading@11: if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) yading@11: udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr); yading@11: closesocket(s->udp_fd); yading@11: #if HAVE_PTHREAD_CANCEL yading@11: if (s->thread_started) { yading@11: pthread_cancel(s->circular_buffer_thread); yading@11: ret = pthread_join(s->circular_buffer_thread, NULL); yading@11: if (ret != 0) yading@11: av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret)); yading@11: pthread_mutex_destroy(&s->mutex); yading@11: pthread_cond_destroy(&s->cond); yading@11: } yading@11: #endif yading@11: av_fifo_free(s->fifo); yading@11: return 0; yading@11: } yading@11: yading@11: URLProtocol ff_udp_protocol = { yading@11: .name = "udp", yading@11: .url_open = udp_open, yading@11: .url_read = udp_read, yading@11: .url_write = udp_write, yading@11: .url_close = udp_close, yading@11: .url_get_file_handle = udp_get_file_handle, yading@11: .priv_data_size = sizeof(UDPContext), yading@11: .priv_data_class = &udp_context_class, yading@11: .flags = URL_PROTOCOL_FLAG_NETWORK, yading@11: };