X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fudp.c;h=9d4c130e5bd7060959339aa6a07a760487223e10;hb=11de006babf735aafa3462d43dd2c02bb6ac6e2f;hp=2bdd3dc773528a22d22fe9802ec8d1893c9f0a2d;hpb=da9cea77e314dad2fbc615a76085a0c330741f92;p=ffmpeg diff --git a/libavformat/udp.c b/libavformat/udp.c index 2bdd3dc7735..9d4c130e5bd 100644 --- a/libavformat/udp.c +++ b/libavformat/udp.c @@ -30,40 +30,74 @@ #include "avio_internal.h" #include "libavutil/parseutils.h" #include "libavutil/avstring.h" -#include +#include "libavutil/opt.h" #include "internal.h" #include "network.h" #include "os_support.h" #include "url.h" -#include #ifndef IPV6_ADD_MEMBERSHIP #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP #endif -typedef struct { +typedef struct UDPContext { + const AVClass *class; int udp_fd; int ttl; int buffer_size; + int pkt_size; int is_multicast; int local_port; int reuse_socket; struct sockaddr_storage dest_addr; int dest_addr_len; int is_connected; + char *localaddr; + char *sources; + char *block; } UDPContext; #define UDP_TX_BUF_SIZE 32768 #define UDP_MAX_PKT_SIZE 65536 +#define OFFSET(x) offsetof(UDPContext, x) +#define D AV_OPT_FLAG_DECODING_PARAM +#define E AV_OPT_FLAG_ENCODING_PARAM +static const AVOption options[] = { + { "ttl", "Time to live (in milliseconds, multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, .flags = D|E }, + { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, + { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E }, + { "reuse_socket", "Reuse socket", OFFSET(reuse_socket), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, .flags = D|E }, + { "connect", "Connect socket", OFFSET(is_connected), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E }, + { "pkt_size", "Maximum packet size", OFFSET(pkt_size), 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 }, + { "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 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) { - av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL): %s\n", strerror(errno)); + log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)"); return -1; } } @@ -71,7 +105,7 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL, #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) { - av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno)); + log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)"); return -1; } } @@ -88,7 +122,7 @@ static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; mreq.imr_interface.s_addr= INADDR_ANY; if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { - av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP): %s\n", strerror(errno)); + log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)"); return -1; } } @@ -100,7 +134,7 @@ static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) 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) { - av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP): %s\n", strerror(errno)); + log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)"); return -1; } } @@ -117,7 +151,7 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; mreq.imr_interface.s_addr= INADDR_ANY; if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { - av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP): %s\n", strerror(errno)); + log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)"); return -1; } } @@ -129,7 +163,7 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) 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) { - av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP): %s\n", strerror(errno)); + log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)"); return -1; } } @@ -137,10 +171,11 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) return 0; } -static struct addrinfo* udp_resolve_host(const char *hostname, int port, +static struct addrinfo *udp_resolve_host(URLContext *h, + const char *hostname, int port, int type, int family, int flags) { - struct addrinfo hints, *res = 0; + struct addrinfo hints = { 0 }, *res = 0; int error; char sport[16]; const char *node = 0, *service = "0"; @@ -152,25 +187,102 @@ static struct addrinfo* udp_resolve_host(const char *hostname, int port, if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { node = hostname; } - memset(&hints, 0, sizeof(hints)); 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)); + 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_url(struct sockaddr_storage *addr, +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(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); + res0 = udp_resolve_host(h, 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; @@ -179,23 +291,25 @@ static int udp_set_url(struct sockaddr_storage *addr, return addr_len; } -static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, - int *addr_len, const char *localaddr) +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 = 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, + res0 = udp_resolve_host(h, (localaddr && 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 = socket(res->ai_family, SOCK_DGRAM, 0); - if (udp_fd > 0) break; - av_log(NULL, AV_LOG_ERROR, "socket: %s\n", strerror(errno)); + 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) @@ -219,9 +333,10 @@ static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, static int udp_port(struct sockaddr_storage *addr, int addr_len) { char sbuf[sizeof(int)*3+1]; + int error; - if (getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV) != 0) { - av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", strerror(errno)); + 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; } @@ -254,7 +369,7 @@ int ff_udp_set_remote_url(URLContext *h, const char *uri) 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); + s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port); if (s->dest_addr_len < 0) { return AVERROR(EIO); } @@ -268,7 +383,7 @@ int ff_udp_set_remote_url(URLContext *h, const char *uri) if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { s->is_connected = 0; - av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno)); + log_net_error(h, AV_LOG_ERROR, "connect"); return AVERROR(EIO); } } @@ -300,6 +415,27 @@ static int udp_get_file_handle(URLContext *h) return s->udp_fd; } +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) @@ -311,16 +447,33 @@ static int udp_open(URLContext *h, const char *uri, int flags) const char *p; char buf[256]; struct sockaddr_storage my_addr; - int len; - int reuse_specified = 0; + socklen_t len; + int i, num_include_sources = 0, num_exclude_sources = 0; + char *include_sources[32], *exclude_sources[32]; h->is_streamed = 1; h->max_packet_size = 1472; is_output = !(flags & AVIO_FLAG_READ); - s->ttl = 16; - s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; + 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) { @@ -330,7 +483,6 @@ static int udp_open(URLContext *h, const char *uri, int flags) /* 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), "ttl", p)) { s->ttl = strtol(buf, NULL, 10); @@ -350,6 +502,16 @@ static int udp_open(URLContext *h, const char *uri, int flags) 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; + } } /* fill the dest addr */ @@ -365,44 +527,75 @@ static int udp_open(URLContext *h, const char *uri, int flags) goto fail; } - if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ)) + if ((s->is_multicast || s->local_port < 0) && (h->flags & AVIO_FLAG_READ)) s->local_port = port; - udp_fd = udp_socket_create(s, &my_addr, &len, localaddr); + + 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; /* 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)) { + 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; } - /* the bind is needed to give a port to the socket now */ - /* if multicast, try the multicast address bind first */ - if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) { + /* 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 */ - if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) + /* 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_READ)) { + if (h->flags & AVIO_FLAG_WRITE) { /* output */ if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) goto fail; - } else { + } + if (h->flags & AVIO_FLAG_READ) { /* input */ - if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0) + 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) < 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; + } } } @@ -410,7 +603,7 @@ static int udp_open(URLContext *h, const char *uri, int flags) /* limit the tx buf size to limit latency */ tmp = s->buffer_size; if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { - av_log(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno)); + log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)"); goto fail; } } else { @@ -418,23 +611,32 @@ static int udp_open(URLContext *h, const char *uri, int flags) * 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) { - av_log(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno)); + 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)) { - av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno)); + 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; return 0; fail: if (udp_fd >= 0) closesocket(udp_fd); + 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); } @@ -483,7 +685,7 @@ static int udp_close(URLContext *h) return 0; } -URLProtocol ff_udp_protocol = { +const URLProtocol ff_udp_protocol = { .name = "udp", .url_open = udp_open, .url_read = udp_read, @@ -491,4 +693,6 @@ URLProtocol ff_udp_protocol = { .url_close = udp_close, .url_get_file_handle = udp_get_file_handle, .priv_data_size = sizeof(UDPContext), + .flags = URL_PROTOCOL_FLAG_NETWORK, + .priv_data_class = &udp_class, };