| /* |
| * 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 _DEFAULT_SOURCE |
| #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_UDPLITE_H |
| #include "udplite.h" |
| #else |
| /* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite. |
| * So, we provide a fallback here. |
| */ |
| #define UDPLITE_SEND_CSCOV 10 |
| #define UDPLITE_RECV_CSCOV 11 |
| #endif |
| |
| #ifndef IPPROTO_UDPLITE |
| #define IPPROTO_UDPLITE 136 |
| #endif |
| |
| #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 |
| #define UDP_HEADER_SIZE 8 |
| |
| typedef struct UDPContext { |
| const AVClass *class; |
| int udp_fd; |
| int ttl; |
| int udplite_coverage; |
| int buffer_size; |
| int pkt_size; |
| int is_multicast; |
| int is_broadcast; |
| 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 *localaddr; |
| int timeout; |
| struct sockaddr_storage local_addr_storage; |
| char *sources; |
| char *block; |
| } 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", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, |
| { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E }, |
| { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, |
| { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, |
| { "udplite_coverage", "choose UDPLite head size which should be validated by checksum", OFFSET(udplite_coverage), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, |
| { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E }, |
| { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E }, |
| { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E }, |
| { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E }, |
| { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E }, |
| { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E }, |
| { "fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D }, |
| { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.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 }, |
| { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, |
| { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E }, |
| { NULL } |
| }; |
| |
| static const AVClass udp_class = { |
| .class_name = "udp", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| static const AVClass udplite_context_class = { |
| .class_name = "udplite", |
| .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(URLContext *h, |
| 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(h, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n", |
| node ? node : "unknown", |
| service ? service : "unknown", |
| gai_strerror(error)); |
| } |
| |
| return res; |
| } |
| |
| static int udp_set_multicast_sources(URLContext *h, |
| 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(h, 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(h, 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(URLContext *h, |
| struct sockaddr_storage *addr, |
| const char *hostname, int port) |
| { |
| struct addrinfo *res0; |
| int addr_len; |
| |
| res0 = udp_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); |
| if (!res0) return AVERROR(EIO); |
| memcpy(addr, res0->ai_addr, res0->ai_addrlen); |
| addr_len = res0->ai_addrlen; |
| freeaddrinfo(res0); |
| |
| return addr_len; |
| } |
| |
| static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr, |
| socklen_t *addr_len, const char *localaddr) |
| { |
| UDPContext *s = h->priv_data; |
| int udp_fd = -1; |
| struct addrinfo *res0, *res; |
| int family = AF_UNSPEC; |
| |
| if (((struct sockaddr *) &s->dest_addr)->sa_family) |
| family = ((struct sockaddr *) &s->dest_addr)->sa_family; |
| res0 = udp_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL, |
| s->local_port, |
| SOCK_DGRAM, family, AI_PASSIVE); |
| if (!res0) |
| goto fail; |
| for (res = res0; res; res=res->ai_next) { |
| if (s->udplite_coverage) |
| udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE); |
| else |
| udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0); |
| if (udp_fd != -1) break; |
| log_net_error(NULL, AV_LOG_ERROR, "socket"); |
| } |
| |
| if (udp_fd < 0) |
| goto fail; |
| |
| memcpy(addr, res->ai_addr, res->ai_addrlen); |
| *addr_len = res->ai_addrlen; |
| |
| freeaddrinfo(res0); |
| |
| return udp_fd; |
| |
| fail: |
| if (udp_fd >= 0) |
| closesocket(udp_fd); |
| if(res0) |
| freeaddrinfo(res0); |
| return -1; |
| } |
| |
| static int udp_port(struct sockaddr_storage *addr, int addr_len) |
| { |
| char sbuf[sizeof(int)*3+1]; |
| int error; |
| |
| if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) { |
| av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error)); |
| return -1; |
| } |
| |
| return strtol(sbuf, NULL, 10); |
| } |
| |
| |
| /** |
| * If no filename is given to av_open_input_file because you want to |
| * get the local port first, then you must call this function to set |
| * the remote server address. |
| * |
| * url syntax: udp://host:port[?option=val...] |
| * option: 'ttl=n' : set the ttl value (for multicast only) |
| * 'localport=n' : set the local port |
| * 'pkt_size=n' : set max packet size |
| * 'reuse=1' : enable reusing the socket |
| * 'overrun_nonfatal=1': survive in case of circular buffer overrun |
| * |
| * @param h media file context |
| * @param uri of the remote server |
| * @return zero if no error. |
| */ |
| int ff_udp_set_remote_url(URLContext *h, const char *uri) |
| { |
| UDPContext *s = h->priv_data; |
| char hostname[256], buf[10]; |
| int port; |
| const char *p; |
| |
| av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); |
| |
| /* set the destination address */ |
| s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port); |
| if (s->dest_addr_len < 0) { |
| return AVERROR(EIO); |
| } |
| s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr); |
| p = strchr(uri, '?'); |
| if (p) { |
| if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { |
| int was_connected = s->is_connected; |
| s->is_connected = strtol(buf, NULL, 10); |
| if (s->is_connected && !was_connected) { |
| if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr, |
| s->dest_addr_len)) { |
| s->is_connected = 0; |
| log_net_error(h, AV_LOG_ERROR, "connect"); |
| return AVERROR(EIO); |
| } |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Return the local port used by the UDP connection |
| * @param h media file context |
| * @return the local port number |
| */ |
| int ff_udp_get_local_port(URLContext *h) |
| { |
| UDPContext *s = h->priv_data; |
| return s->local_port; |
| } |
| |
| /** |
| * Return the udp file handle for select() usage to wait for several RTP |
| * streams at the same time. |
| * @param h media file context |
| */ |
| static int udp_get_file_handle(URLContext *h) |
| { |
| UDPContext *s = h->priv_data; |
| return s->udp_fd; |
| } |
| |
| #if HAVE_PTHREAD_CANCEL |
| static void *circular_buffer_task( void *_URLContext) |
| { |
| URLContext *h = _URLContext; |
| UDPContext *s = h->priv_data; |
| int old_cancelstate; |
| |
| pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); |
| pthread_mutex_lock(&s->mutex); |
| if (ff_socket_nonblock(s->udp_fd, 0) < 0) { |
| av_log(h, AV_LOG_ERROR, "Failed to set blocking mode"); |
| s->circular_buffer_error = AVERROR(EIO); |
| goto end; |
| } |
| while(1) { |
| int len; |
| |
| pthread_mutex_unlock(&s->mutex); |
| /* Blocking operations are always cancellation points; |
| see "General Information" / "Thread Cancelation Overview" |
| in Single Unix. */ |
| pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); |
| len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0); |
| pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); |
| pthread_mutex_lock(&s->mutex); |
| if (len < 0) { |
| if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) { |
| s->circular_buffer_error = ff_neterrno(); |
| goto end; |
| } |
| continue; |
| } |
| AV_WL32(s->tmp, len); |
| |
| if(av_fifo_space(s->fifo) < len + 4) { |
| /* No Space left */ |
| if (s->overrun_nonfatal) { |
| av_log(h, AV_LOG_WARNING, "Circular buffer overrun. " |
| "Surviving due to overrun_nonfatal option\n"); |
| continue; |
| } else { |
| av_log(h, AV_LOG_ERROR, "Circular buffer overrun. " |
| "To avoid, increase fifo_size URL option. " |
| "To survive in such case, use overrun_nonfatal option\n"); |
| s->circular_buffer_error = AVERROR(EIO); |
| goto end; |
| } |
| } |
| av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL); |
| pthread_cond_signal(&s->cond); |
| } |
| |
| end: |
| pthread_cond_signal(&s->cond); |
| pthread_mutex_unlock(&s->mutex); |
| return NULL; |
| } |
| #endif |
| |
| static int parse_source_list(char *buf, char **sources, int *num_sources, |
| int max_sources) |
| { |
| char *source_start; |
| |
| source_start = buf; |
| while (1) { |
| char *next = strchr(source_start, ','); |
| if (next) |
| *next = '\0'; |
| sources[*num_sources] = av_strdup(source_start); |
| if (!sources[*num_sources]) |
| return AVERROR(ENOMEM); |
| source_start = next + 1; |
| (*num_sources)++; |
| if (*num_sources >= max_sources || !next) |
| break; |
| } |
| return 0; |
| } |
| |
| /* put it in UDP context */ |
| /* return non zero if error */ |
| static int udp_open(URLContext *h, const char *uri, int flags) |
| { |
| char hostname[1024], localaddr[1024] = ""; |
| int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1; |
| UDPContext *s = h->priv_data; |
| int is_output; |
| const char *p; |
| char buf[256]; |
| struct sockaddr_storage my_addr; |
| socklen_t len; |
| int 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 < 0) |
| s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; |
| |
| if (s->sources) { |
| if (parse_source_list(s->sources, include_sources, |
| &num_include_sources, |
| FF_ARRAY_ELEMS(include_sources))) |
| goto fail; |
| } |
| |
| if (s->block) { |
| if (parse_source_list(s->block, exclude_sources, &num_exclude_sources, |
| FF_ARRAY_ELEMS(exclude_sources))) |
| goto fail; |
| } |
| |
| if (s->pkt_size > 0) |
| h->max_packet_size = s->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; |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) { |
| char *endptr = NULL; |
| s->overrun_nonfatal = strtol(buf, &endptr, 10); |
| /* assume if no digits were found it is a request to enable it */ |
| if (buf == endptr) |
| s->overrun_nonfatal = 1; |
| if (!HAVE_PTHREAD_CANCEL) |
| av_log(h, AV_LOG_WARNING, |
| "'overrun_nonfatal' option was set but it is not supported " |
| "on this build (pthread support is required)\n"); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) { |
| s->ttl = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) { |
| s->udplite_coverage = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "localport", p)) { |
| s->local_port = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { |
| s->pkt_size = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) { |
| s->buffer_size = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { |
| s->is_connected = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) { |
| dscp = strtol(buf, NULL, 10); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { |
| s->circular_buffer_size = strtol(buf, NULL, 10); |
| if (!HAVE_PTHREAD_CANCEL) |
| av_log(h, AV_LOG_WARNING, |
| "'circular_buffer_size' option was set but it is not supported " |
| "on this build (pthread support is required)\n"); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) { |
| av_strlcpy(localaddr, buf, sizeof(localaddr)); |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "sources", p)) { |
| if (parse_source_list(buf, include_sources, &num_include_sources, |
| FF_ARRAY_ELEMS(include_sources))) |
| goto fail; |
| } |
| if (av_find_info_tag(buf, sizeof(buf), "block", p)) { |
| if (parse_source_list(buf, exclude_sources, &num_exclude_sources, |
| FF_ARRAY_ELEMS(exclude_sources))) |
| goto fail; |
| } |
| if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p)) |
| s->timeout = strtol(buf, NULL, 10); |
| if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p)) |
| s->is_broadcast = strtol(buf, NULL, 10); |
| } |
| /* handling needed to support options picking from both AVOption and URL */ |
| s->circular_buffer_size *= 188; |
| if (flags & AVIO_FLAG_WRITE) { |
| h->max_packet_size = s->pkt_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 <= 0) && (h->flags & AVIO_FLAG_READ)) |
| s->local_port = port; |
| |
| if (localaddr[0]) |
| udp_fd = udp_socket_create(h, &my_addr, &len, localaddr); |
| else |
| udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr); |
| 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 > 0 || (s->is_multicast && s->reuse_socket < 0)) { |
| s->reuse_socket = 1; |
| if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) |
| goto fail; |
| } |
| |
| if (s->is_broadcast) { |
| #ifdef SO_BROADCAST |
| if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0) |
| #endif |
| goto fail; |
| } |
| |
| /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving. |
| * The receiver coverage has to be less than or equal to the sender coverage. |
| * Otherwise, the receiver will drop all packets. |
| */ |
| if (s->udplite_coverage) { |
| if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0) |
| av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available"); |
| |
| if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0) |
| av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available"); |
| } |
| |
| if (dscp >= 0) { |
| dscp <<= 2; |
| if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) |
| goto fail; |
| } |
| |
| /* If multicast, try binding the multicast address first, to avoid |
| * receiving UDP packets from other sources aimed at the same UDP |
| * port. This fails on windows. This makes sending to the same address |
| * using sendto() fail, so only do it if we're opened in read-only mode. */ |
| if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) { |
| bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len); |
| } |
| /* bind to the local address if not multicast or if the multicast |
| * bind failed */ |
| /* the bind is needed to give a port to the socket now */ |
| if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) { |
| log_net_error(h, AV_LOG_ERROR, "bind failed"); |
| goto fail; |
| } |
| |
| len = sizeof(my_addr); |
| getsockname(udp_fd, (struct sockaddr *)&my_addr, &len); |
| s->local_port = udp_port(&my_addr, len); |
| |
| if (s->is_multicast) { |
| if (h->flags & AVIO_FLAG_WRITE) { |
| /* output */ |
| if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) |
| goto fail; |
| } |
| if (h->flags & AVIO_FLAG_READ) { |
| /* input */ |
| if (num_include_sources && num_exclude_sources) { |
| av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n"); |
| goto fail; |
| } |
| if (num_include_sources) { |
| if (udp_set_multicast_sources(h, 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(h, udp_fd, |
| (struct sockaddr *)&s->dest_addr, |
| s->dest_addr_len, |
| exclude_sources, |
| num_exclude_sources, 0) < 0) |
| goto fail; |
| } |
| } |
| } |
| |
| if (is_output) { |
| /* limit the tx buf size to limit latency */ |
| tmp = s->buffer_size; |
| if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { |
| log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)"); |
| goto fail; |
| } |
| } else { |
| /* set udp recv buffer size to the requested value (default 64K) */ |
| tmp = s->buffer_size; |
| if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) { |
| log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)"); |
| } |
| len = sizeof(tmp); |
| if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) { |
| log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)"); |
| } else { |
| av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp); |
| if(tmp < s->buffer_size) |
| av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d", s->buffer_size, tmp); |
| } |
| |
| /* make the socket non-blocking */ |
| ff_socket_nonblock(udp_fd, 1); |
| } |
| if (s->is_connected) { |
| if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { |
| log_net_error(h, AV_LOG_ERROR, "connect"); |
| goto fail; |
| } |
| } |
| |
| for (i = 0; i < num_include_sources; i++) |
| av_freep(&include_sources[i]); |
| for (i = 0; i < num_exclude_sources; i++) |
| av_freep(&exclude_sources[i]); |
| |
| s->udp_fd = udp_fd; |
| |
| #if HAVE_PTHREAD_CANCEL |
| if (!is_output && s->circular_buffer_size) { |
| int ret; |
| |
| /* start the task going */ |
| s->fifo = av_fifo_alloc(s->circular_buffer_size); |
| ret = pthread_mutex_init(&s->mutex, NULL); |
| if (ret != 0) { |
| av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret)); |
| goto fail; |
| } |
| ret = pthread_cond_init(&s->cond, NULL); |
| if (ret != 0) { |
| av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret)); |
| goto cond_fail; |
| } |
| ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h); |
| if (ret != 0) { |
| av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret)); |
| goto thread_fail; |
| } |
| s->thread_started = 1; |
| } |
| #endif |
| |
| return 0; |
| #if HAVE_PTHREAD_CANCEL |
| thread_fail: |
| pthread_cond_destroy(&s->cond); |
| cond_fail: |
| pthread_mutex_destroy(&s->mutex); |
| #endif |
| fail: |
| if (udp_fd >= 0) |
| closesocket(udp_fd); |
| av_fifo_freep(&s->fifo); |
| for (i = 0; i < num_include_sources; i++) |
| av_freep(&include_sources[i]); |
| for (i = 0; i < num_exclude_sources; i++) |
| av_freep(&exclude_sources[i]); |
| return AVERROR(EIO); |
| } |
| |
| static int udplite_open(URLContext *h, const char *uri, int flags) |
| { |
| UDPContext *s = h->priv_data; |
| |
| // set default checksum coverage |
| s->udplite_coverage = UDP_HEADER_SIZE; |
| |
| return udp_open(h, uri, flags); |
| } |
| |
| static int udp_read(URLContext *h, uint8_t *buf, int size) |
| { |
| UDPContext *s = h->priv_data; |
| int ret; |
| #if HAVE_PTHREAD_CANCEL |
| int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK; |
| |
| if (s->fifo) { |
| pthread_mutex_lock(&s->mutex); |
| do { |
| avail = av_fifo_size(s->fifo); |
| if (avail) { // >=size) { |
| uint8_t tmp[4]; |
| |
| av_fifo_generic_read(s->fifo, tmp, 4, NULL); |
| avail= AV_RL32(tmp); |
| if(avail > size){ |
| av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n"); |
| avail= size; |
| } |
| |
| av_fifo_generic_read(s->fifo, buf, avail, NULL); |
| av_fifo_drain(s->fifo, AV_RL32(tmp) - avail); |
| pthread_mutex_unlock(&s->mutex); |
| return avail; |
| } else if(s->circular_buffer_error){ |
| int err = s->circular_buffer_error; |
| pthread_mutex_unlock(&s->mutex); |
| return err; |
| } else if(nonblock) { |
| pthread_mutex_unlock(&s->mutex); |
| return AVERROR(EAGAIN); |
| } |
| else { |
| /* FIXME: using the monotonic clock would be better, |
| but it does not exist on all supported platforms. */ |
| int64_t t = av_gettime() + 100000; |
| struct timespec tv = { .tv_sec = t / 1000000, |
| .tv_nsec = (t % 1000000) * 1000 }; |
| if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) { |
| pthread_mutex_unlock(&s->mutex); |
| return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno); |
| } |
| nonblock = 1; |
| } |
| } while( 1); |
| } |
| #endif |
| |
| if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
| ret = ff_network_wait_fd(s->udp_fd, 0); |
| if (ret < 0) |
| return ret; |
| } |
| ret = recv(s->udp_fd, buf, size, 0); |
| |
| return ret < 0 ? ff_neterrno() : ret; |
| } |
| |
| static int udp_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| UDPContext *s = h->priv_data; |
| int ret; |
| |
| if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
| ret = ff_network_wait_fd(s->udp_fd, 1); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (!s->is_connected) { |
| ret = sendto (s->udp_fd, buf, size, 0, |
| (struct sockaddr *) &s->dest_addr, |
| s->dest_addr_len); |
| } else |
| ret = send(s->udp_fd, buf, size, 0); |
| |
| return ret < 0 ? ff_neterrno() : ret; |
| } |
| |
| static int udp_close(URLContext *h) |
| { |
| UDPContext *s = h->priv_data; |
| |
| if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) |
| udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage); |
| closesocket(s->udp_fd); |
| #if HAVE_PTHREAD_CANCEL |
| if (s->thread_started) { |
| int ret; |
| pthread_cancel(s->circular_buffer_thread); |
| ret = pthread_join(s->circular_buffer_thread, NULL); |
| if (ret != 0) |
| av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret)); |
| pthread_mutex_destroy(&s->mutex); |
| pthread_cond_destroy(&s->cond); |
| } |
| #endif |
| av_fifo_freep(&s->fifo); |
| return 0; |
| } |
| |
| URLProtocol ff_udp_protocol = { |
| .name = "udp", |
| .url_open = udp_open, |
| .url_read = udp_read, |
| .url_write = udp_write, |
| .url_close = udp_close, |
| .url_get_file_handle = udp_get_file_handle, |
| .priv_data_size = sizeof(UDPContext), |
| .priv_data_class = &udp_class, |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |
| |
| URLProtocol ff_udplite_protocol = { |
| .name = "udplite", |
| .url_open = udplite_open, |
| .url_read = udp_read, |
| .url_write = udp_write, |
| .url_close = udp_close, |
| .url_get_file_handle = udp_get_file_handle, |
| .priv_data_size = sizeof(UDPContext), |
| .priv_data_class = &udplite_context_class, |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |
