mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 17:58:25 -05:00
1124 lines
40 KiB
C
Executable File
1124 lines
40 KiB
C
Executable File
/*
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* UDP prototype streaming system
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* UDP protocol
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*/
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#define _DEFAULT_SOURCE
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#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
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#include "avformat.h"
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#include "avio_internal.h"
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#include "libavutil/avassert.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/fifo.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "libavutil/log.h"
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#include "libavutil/time.h"
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include "url.h"
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#include "ip.h"
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#ifdef __APPLE__
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#include "TargetConditionals.h"
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#endif
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#if HAVE_UDPLITE_H
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#include "udplite.h"
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#else
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/* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
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* So, we provide a fallback here.
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*/
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#define UDPLITE_SEND_CSCOV 10
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#define UDPLITE_RECV_CSCOV 11
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#endif
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#ifndef IPPROTO_UDPLITE
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#define IPPROTO_UDPLITE 136
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#endif
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#if HAVE_W32THREADS
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#undef HAVE_PTHREAD_CANCEL
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#define HAVE_PTHREAD_CANCEL 1
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#endif
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#if HAVE_PTHREAD_CANCEL
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#include "libavutil/thread.h"
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#endif
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#ifndef IPV6_ADD_MEMBERSHIP
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#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
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#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
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#endif
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#define UDP_TX_BUF_SIZE 32768
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#define UDP_RX_BUF_SIZE 393216
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#define UDP_MAX_PKT_SIZE 65536
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#define UDP_HEADER_SIZE 8
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typedef struct UDPContext {
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const AVClass *class;
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int udp_fd;
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int ttl;
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int udplite_coverage;
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int buffer_size;
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int pkt_size;
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int is_multicast;
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int is_broadcast;
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int local_port;
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int reuse_socket;
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int overrun_nonfatal;
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struct sockaddr_storage dest_addr;
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int dest_addr_len;
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int is_connected;
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/* Circular Buffer variables for use in UDP receive code */
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int circular_buffer_size;
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AVFifoBuffer *fifo;
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int circular_buffer_error;
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int64_t bitrate; /* number of bits to send per second */
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int64_t burst_bits;
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int close_req;
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#if HAVE_PTHREAD_CANCEL
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pthread_t circular_buffer_thread;
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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int thread_started;
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#endif
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uint8_t tmp[UDP_MAX_PKT_SIZE+4];
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int remaining_in_dg;
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char *localaddr;
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int timeout;
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struct sockaddr_storage local_addr_storage;
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char *sources;
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char *block;
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IPSourceFilters filters;
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} UDPContext;
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#define OFFSET(x) offsetof(UDPContext, x)
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#define D AV_OPT_FLAG_DECODING_PARAM
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#define E AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
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{ "burst_bits", "Max length of bursts in bits (when using bitrate)", OFFSET(burst_bits), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
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{ "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
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{ "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
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{ "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 },
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{ "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
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{ "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
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{ "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
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{ "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
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{ "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E },
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{ "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
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{ "fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D },
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{ "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
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{ "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
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{ "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
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{ "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
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{ NULL }
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};
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static const AVClass udp_class = {
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.class_name = "udp",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVClass udplite_context_class = {
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.class_name = "udplite",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
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struct sockaddr *addr)
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{
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#ifdef IP_MULTICAST_TTL
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if (addr->sa_family == AF_INET) {
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if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
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return -1;
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}
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}
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#endif
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#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
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if (addr->sa_family == AF_INET6) {
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if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
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return -1;
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}
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}
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#endif
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return 0;
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}
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static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
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{
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#ifdef IP_ADD_MEMBERSHIP
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if (addr->sa_family == AF_INET) {
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
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if (local_addr)
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mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
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else
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mreq.imr_interface.s_addr= INADDR_ANY;
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if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
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return -1;
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}
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}
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#endif
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#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
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if (addr->sa_family == AF_INET6) {
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struct ipv6_mreq mreq6;
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memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
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//TODO: Interface index should be looked up from local_addr
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mreq6.ipv6mr_interface= 0;
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if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
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return -1;
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}
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}
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#endif
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return 0;
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}
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static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
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{
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#ifdef IP_DROP_MEMBERSHIP
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if (addr->sa_family == AF_INET) {
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
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if (local_addr)
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mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
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else
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mreq.imr_interface.s_addr= INADDR_ANY;
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if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
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return -1;
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}
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}
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#endif
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#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
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if (addr->sa_family == AF_INET6) {
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struct ipv6_mreq mreq6;
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memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
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//TODO: Interface index should be looked up from local_addr
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mreq6.ipv6mr_interface= 0;
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if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
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return -1;
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}
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}
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#endif
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return 0;
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}
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static int udp_set_multicast_sources(URLContext *h,
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int sockfd, struct sockaddr *addr,
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int addr_len, struct sockaddr_storage *local_addr,
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struct sockaddr_storage *sources,
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int nb_sources, int include)
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{
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int i;
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if (addr->sa_family != AF_INET) {
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#if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE)
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/* For IPv4 prefer the old approach, as that alone works reliably on
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* Windows and it also supports supplying the interface based on its
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* address. */
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int i;
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for (i = 0; i < nb_sources; i++) {
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struct group_source_req mreqs;
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int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
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//TODO: Interface index should be looked up from local_addr
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mreqs.gsr_interface = 0;
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memcpy(&mreqs.gsr_group, addr, addr_len);
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memcpy(&mreqs.gsr_source, &sources[i], sizeof(*sources));
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if (setsockopt(sockfd, level,
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include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
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(const void *)&mreqs, sizeof(mreqs)) < 0) {
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if (include)
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
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else
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ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
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return ff_neterrno();
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}
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}
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return 0;
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#else
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av_log(h, AV_LOG_ERROR,
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"Setting multicast sources only supported for IPv4\n");
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return AVERROR(EINVAL);
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#endif
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}
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#if HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
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for (i = 0; i < nb_sources; i++) {
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struct ip_mreq_source mreqs;
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if (sources[i].ss_family != AF_INET) {
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av_log(h, AV_LOG_ERROR, "Source/block address %d is of incorrect protocol family\n", i + 1);
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return AVERROR(EINVAL);
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}
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mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
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if (local_addr)
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mreqs.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
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else
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mreqs.imr_interface.s_addr= INADDR_ANY;
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mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)&sources[i])->sin_addr.s_addr;
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if (setsockopt(sockfd, IPPROTO_IP,
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include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
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(const void *)&mreqs, sizeof(mreqs)) < 0) {
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if (include)
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ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
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else
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ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
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return ff_neterrno();
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}
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}
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#else
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return AVERROR(ENOSYS);
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#endif
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return 0;
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}
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static int udp_set_url(URLContext *h,
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struct sockaddr_storage *addr,
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const char *hostname, int port)
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{
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struct addrinfo *res0;
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int addr_len;
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res0 = ff_ip_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
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if (!res0) return AVERROR(EIO);
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memcpy(addr, res0->ai_addr, res0->ai_addrlen);
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addr_len = res0->ai_addrlen;
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freeaddrinfo(res0);
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return addr_len;
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}
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static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
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socklen_t *addr_len, const char *localaddr)
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{
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UDPContext *s = h->priv_data;
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int udp_fd = -1;
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struct addrinfo *res0, *res;
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int family = AF_UNSPEC;
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if (((struct sockaddr *) &s->dest_addr)->sa_family)
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family = ((struct sockaddr *) &s->dest_addr)->sa_family;
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res0 = ff_ip_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
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s->local_port,
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SOCK_DGRAM, family, AI_PASSIVE);
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if (!res0)
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goto fail;
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for (res = res0; res; res=res->ai_next) {
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if (s->udplite_coverage)
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udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
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else
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udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
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if (udp_fd != -1) break;
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ff_log_net_error(NULL, AV_LOG_ERROR, "socket");
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}
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|
|
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if (udp_fd < 0)
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goto fail;
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|
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memcpy(addr, res->ai_addr, res->ai_addrlen);
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*addr_len = res->ai_addrlen;
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freeaddrinfo(res0);
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return udp_fd;
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fail:
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if (udp_fd >= 0)
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closesocket(udp_fd);
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if(res0)
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freeaddrinfo(res0);
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return -1;
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}
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|
|
|
static int udp_port(struct sockaddr_storage *addr, int addr_len)
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{
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char sbuf[sizeof(int)*3+1];
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int error;
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if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
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av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
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return -1;
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}
|
|
|
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return strtol(sbuf, NULL, 10);
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}
|
|
|
|
|
|
/**
|
|
* If no filename is given to av_open_input_file because you want to
|
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* get the local port first, then you must call this function to set
|
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* the remote server address.
|
|
*
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* url syntax: udp://host:port[?option=val...]
|
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* option: 'ttl=n' : set the ttl value (for multicast only)
|
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* 'localport=n' : set the local port
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* 'pkt_size=n' : set max packet size
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* 'reuse=1' : enable reusing the socket
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* 'overrun_nonfatal=1': survive in case of circular buffer overrun
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*
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* @param h media file context
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* @param uri of the remote server
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* @return zero if no error.
|
|
*/
|
|
int ff_udp_set_remote_url(URLContext *h, const char *uri)
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{
|
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UDPContext *s = h->priv_data;
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char hostname[256], buf[10];
|
|
int port;
|
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const char *p;
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|
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av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
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|
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/* set the destination address */
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s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
|
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if (s->dest_addr_len < 0) {
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return AVERROR(EIO);
|
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}
|
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s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
|
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p = strchr(uri, '?');
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if (p) {
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|
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
|
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int was_connected = s->is_connected;
|
|
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;
|
|
ff_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_rx( 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;
|
|
struct sockaddr_storage addr;
|
|
socklen_t addr_len = sizeof(addr);
|
|
|
|
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 = recvfrom(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0, (struct sockaddr *)&addr, &addr_len);
|
|
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;
|
|
}
|
|
if (ff_ip_check_source_lists(&addr, &s->filters))
|
|
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;
|
|
}
|
|
|
|
static void *circular_buffer_task_tx( void *_URLContext)
|
|
{
|
|
URLContext *h = _URLContext;
|
|
UDPContext *s = h->priv_data;
|
|
int64_t target_timestamp = av_gettime_relative();
|
|
int64_t start_timestamp = av_gettime_relative();
|
|
int64_t sent_bits = 0;
|
|
int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
|
|
int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
|
|
|
|
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;
|
|
}
|
|
|
|
for(;;) {
|
|
int len;
|
|
const uint8_t *p;
|
|
uint8_t tmp[4];
|
|
int64_t timestamp;
|
|
|
|
len=av_fifo_size(s->fifo);
|
|
|
|
while (len<4) {
|
|
if (s->close_req)
|
|
goto end;
|
|
if (pthread_cond_wait(&s->cond, &s->mutex) < 0) {
|
|
goto end;
|
|
}
|
|
len=av_fifo_size(s->fifo);
|
|
}
|
|
|
|
av_fifo_generic_read(s->fifo, tmp, 4, NULL);
|
|
len=AV_RL32(tmp);
|
|
|
|
av_assert0(len >= 0);
|
|
av_assert0(len <= sizeof(s->tmp));
|
|
|
|
av_fifo_generic_read(s->fifo, s->tmp, len, NULL);
|
|
|
|
pthread_mutex_unlock(&s->mutex);
|
|
|
|
if (s->bitrate) {
|
|
timestamp = av_gettime_relative();
|
|
if (timestamp < target_timestamp) {
|
|
int64_t delay = target_timestamp - timestamp;
|
|
if (delay > max_delay) {
|
|
delay = max_delay;
|
|
start_timestamp = timestamp + delay;
|
|
sent_bits = 0;
|
|
}
|
|
av_usleep(delay);
|
|
} else {
|
|
if (timestamp - burst_interval > target_timestamp) {
|
|
start_timestamp = timestamp - burst_interval;
|
|
sent_bits = 0;
|
|
}
|
|
}
|
|
sent_bits += len * 8;
|
|
target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
|
|
}
|
|
|
|
p = s->tmp;
|
|
while (len) {
|
|
int ret;
|
|
av_assert0(len > 0);
|
|
if (!s->is_connected) {
|
|
ret = sendto (s->udp_fd, p, len, 0,
|
|
(struct sockaddr *) &s->dest_addr,
|
|
s->dest_addr_len);
|
|
} else
|
|
ret = send(s->udp_fd, p, len, 0);
|
|
if (ret >= 0) {
|
|
len -= ret;
|
|
p += ret;
|
|
} else {
|
|
ret = ff_neterrno();
|
|
if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
|
|
pthread_mutex_lock(&s->mutex);
|
|
s->circular_buffer_error = ret;
|
|
pthread_mutex_unlock(&s->mutex);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
pthread_mutex_lock(&s->mutex);
|
|
}
|
|
|
|
end:
|
|
pthread_mutex_unlock(&s->mutex);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
/* 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;
|
|
|
|
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_RX_BUF_SIZE;
|
|
|
|
if (s->sources) {
|
|
if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)
|
|
goto fail;
|
|
}
|
|
|
|
if (s->block) {
|
|
if (ff_ip_parse_blocks(h, s->block, &s->filters) < 0)
|
|
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), "bitrate", p)) {
|
|
s->bitrate = strtoll(buf, NULL, 10);
|
|
if (!HAVE_PTHREAD_CANCEL)
|
|
av_log(h, AV_LOG_WARNING,
|
|
"'bitrate' option was set but it is not supported "
|
|
"on this build (pthread support is required)\n");
|
|
}
|
|
if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
|
|
s->burst_bits = strtoll(buf, NULL, 10);
|
|
}
|
|
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 (ff_ip_parse_sources(h, buf, &s->filters) < 0)
|
|
goto fail;
|
|
}
|
|
if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
|
|
if (ff_ip_parse_blocks(h, buf, &s->filters) < 0)
|
|
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_READ)) {
|
|
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) {
|
|
ff_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 (s->filters.nb_include_addrs) {
|
|
if (udp_set_multicast_sources(h, udp_fd,
|
|
(struct sockaddr *)&s->dest_addr,
|
|
s->dest_addr_len, &s->local_addr_storage,
|
|
s->filters.include_addrs,
|
|
s->filters.nb_include_addrs, 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 (s->filters.nb_exclude_addrs) {
|
|
if (udp_set_multicast_sources(h, udp_fd,
|
|
(struct sockaddr *)&s->dest_addr,
|
|
s->dest_addr_len, &s->local_addr_storage,
|
|
s->filters.exclude_addrs,
|
|
s->filters.nb_exclude_addrs, 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) {
|
|
ff_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) {
|
|
ff_log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
|
|
}
|
|
len = sizeof(tmp);
|
|
if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
|
|
ff_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\n", 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)) {
|
|
ff_log_net_error(h, AV_LOG_ERROR, "connect");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
s->udp_fd = udp_fd;
|
|
|
|
#if HAVE_PTHREAD_CANCEL
|
|
/*
|
|
Create thread in case of:
|
|
1. Input and circular_buffer_size is set
|
|
2. Output and bitrate and circular_buffer_size is set
|
|
*/
|
|
|
|
if (is_output && s->bitrate && !s->circular_buffer_size) {
|
|
/* Warn user in case of 'circular_buffer_size' is not set */
|
|
av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
|
|
}
|
|
|
|
if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && 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, is_output?circular_buffer_task_tx:circular_buffer_task_rx, 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);
|
|
ff_ip_reset_filters(&s->filters);
|
|
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;
|
|
struct sockaddr_storage addr;
|
|
socklen_t addr_len = sizeof(addr);
|
|
#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 };
|
|
int err = pthread_cond_timedwait(&s->cond, &s->mutex, &tv);
|
|
if (err) {
|
|
pthread_mutex_unlock(&s->mutex);
|
|
return AVERROR(err == ETIMEDOUT ? EAGAIN : err);
|
|
}
|
|
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 = recvfrom(s->udp_fd, buf, size, 0, (struct sockaddr *)&addr, &addr_len);
|
|
if (ret < 0)
|
|
return ff_neterrno();
|
|
if (ff_ip_check_source_lists(&addr, &s->filters))
|
|
return AVERROR(EINTR);
|
|
return ret;
|
|
}
|
|
|
|
static int udp_write(URLContext *h, const uint8_t *buf, int size)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
int ret;
|
|
|
|
#if HAVE_PTHREAD_CANCEL
|
|
if (s->fifo) {
|
|
uint8_t tmp[4];
|
|
|
|
pthread_mutex_lock(&s->mutex);
|
|
|
|
/*
|
|
Return error if last tx failed.
|
|
Here we can't know on which packet error was, but it needs to know that error exists.
|
|
*/
|
|
if (s->circular_buffer_error<0) {
|
|
int err=s->circular_buffer_error;
|
|
pthread_mutex_unlock(&s->mutex);
|
|
return err;
|
|
}
|
|
|
|
if(av_fifo_space(s->fifo) < size + 4) {
|
|
/* What about a partial packet tx ? */
|
|
pthread_mutex_unlock(&s->mutex);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
AV_WL32(tmp, size);
|
|
av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */
|
|
av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */
|
|
pthread_cond_signal(&s->cond);
|
|
pthread_mutex_unlock(&s->mutex);
|
|
return size;
|
|
}
|
|
#endif
|
|
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 HAVE_PTHREAD_CANCEL
|
|
// Request close once writing is finished
|
|
if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
|
|
pthread_mutex_lock(&s->mutex);
|
|
s->close_req = 1;
|
|
pthread_cond_signal(&s->cond);
|
|
pthread_mutex_unlock(&s->mutex);
|
|
}
|
|
#endif
|
|
|
|
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);
|
|
#if HAVE_PTHREAD_CANCEL
|
|
if (s->thread_started) {
|
|
int ret;
|
|
// Cancel only read, as write has been signaled as success to the user
|
|
if (h->flags & AVIO_FLAG_READ) {
|
|
#ifdef _WIN32
|
|
/* recvfrom() is not a cancellation point for win32, so we shutdown
|
|
* the socket and abort pending IO, subsequent recvfrom() calls
|
|
* will fail with WSAESHUTDOWN causing the thread to exit. */
|
|
shutdown(s->udp_fd, SD_RECEIVE);
|
|
CancelIoEx((HANDLE)(SOCKET)s->udp_fd, NULL);
|
|
#else
|
|
pthread_cancel(s->circular_buffer_thread);
|
|
#endif
|
|
}
|
|
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
|
|
closesocket(s->udp_fd);
|
|
av_fifo_freep(&s->fifo);
|
|
ff_ip_reset_filters(&s->filters);
|
|
return 0;
|
|
}
|
|
|
|
const 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,
|
|
};
|
|
|
|
const 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,
|
|
};
|