| /* |
| * TCP protocol |
| * Copyright (c) 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 |
| */ |
| #include "avformat.h" |
| #include "libavutil/parseutils.h" |
| #include <unistd.h> |
| #include "internal.h" |
| #include "network.h" |
| #include "os_support.h" |
| #include "url.h" |
| #if HAVE_POLL_H |
| #include <poll.h> |
| #endif |
| #include <sys/time.h> |
| |
| typedef struct TCPContext { |
| int fd; |
| } TCPContext; |
| |
| /* return non zero if error */ |
| static int tcp_open(URLContext *h, const char *uri, int flags) |
| { |
| struct addrinfo hints = { 0 }, *ai, *cur_ai; |
| int port, fd = -1; |
| TCPContext *s = h->priv_data; |
| int listen_socket = 0; |
| const char *p; |
| char buf[256]; |
| int ret; |
| socklen_t optlen; |
| int timeout = 50; |
| char hostname[1024],proto[1024],path[1024]; |
| char portstr[10]; |
| |
| av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), |
| &port, path, sizeof(path), uri); |
| if (strcmp(proto,"tcp") || port <= 0 || port >= 65536) |
| return AVERROR(EINVAL); |
| |
| p = strchr(uri, '?'); |
| if (p) { |
| if (av_find_info_tag(buf, sizeof(buf), "listen", p)) |
| listen_socket = 1; |
| if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) { |
| timeout = strtol(buf, NULL, 10); |
| } |
| } |
| hints.ai_family = AF_UNSPEC; |
| hints.ai_socktype = SOCK_STREAM; |
| snprintf(portstr, sizeof(portstr), "%d", port); |
| ret = getaddrinfo(hostname, portstr, &hints, &ai); |
| if (ret) { |
| av_log(h, AV_LOG_ERROR, |
| "Failed to resolve hostname %s: %s\n", |
| hostname, gai_strerror(ret)); |
| return AVERROR(EIO); |
| } |
| |
| cur_ai = ai; |
| |
| restart: |
| ret = AVERROR(EIO); |
| fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol); |
| if (fd < 0) |
| goto fail; |
| |
| if (listen_socket) { |
| int fd1; |
| ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen); |
| listen(fd, 1); |
| fd1 = accept(fd, NULL, NULL); |
| closesocket(fd); |
| fd = fd1; |
| ff_socket_nonblock(fd, 1); |
| } else { |
| redo: |
| ff_socket_nonblock(fd, 1); |
| ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen); |
| } |
| |
| if (ret < 0) { |
| struct pollfd p = {fd, POLLOUT, 0}; |
| ret = ff_neterrno(); |
| if (ret == AVERROR(EINTR)) { |
| if (ff_check_interrupt(&h->interrupt_callback)) { |
| ret = AVERROR_EXIT; |
| goto fail1; |
| } |
| goto redo; |
| } |
| if (ret != AVERROR(EINPROGRESS) && |
| ret != AVERROR(EAGAIN)) |
| goto fail; |
| |
| /* wait until we are connected or until abort */ |
| while(timeout--) { |
| if (ff_check_interrupt(&h->interrupt_callback)) { |
| ret = AVERROR_EXIT; |
| goto fail1; |
| } |
| ret = poll(&p, 1, 100); |
| if (ret > 0) |
| break; |
| } |
| if (ret <= 0) { |
| ret = AVERROR(ETIMEDOUT); |
| goto fail; |
| } |
| /* test error */ |
| optlen = sizeof(ret); |
| getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen); |
| if (ret != 0) { |
| av_log(h, AV_LOG_ERROR, |
| "TCP connection to %s:%d failed: %s\n", |
| hostname, port, strerror(ret)); |
| ret = AVERROR(ret); |
| goto fail; |
| } |
| } |
| h->is_streamed = 1; |
| s->fd = fd; |
| freeaddrinfo(ai); |
| return 0; |
| |
| fail: |
| if (cur_ai->ai_next) { |
| /* Retry with the next sockaddr */ |
| cur_ai = cur_ai->ai_next; |
| if (fd >= 0) |
| closesocket(fd); |
| goto restart; |
| } |
| fail1: |
| if (fd >= 0) |
| closesocket(fd); |
| freeaddrinfo(ai); |
| return ret; |
| } |
| |
| static int tcp_read(URLContext *h, uint8_t *buf, int size) |
| { |
| TCPContext *s = h->priv_data; |
| int ret; |
| |
| if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
| ret = ff_network_wait_fd(s->fd, 0); |
| if (ret < 0) |
| return ret; |
| } |
| ret = recv(s->fd, buf, size, 0); |
| return ret < 0 ? ff_neterrno() : ret; |
| } |
| |
| static int tcp_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| TCPContext *s = h->priv_data; |
| int ret; |
| |
| if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
| ret = ff_network_wait_fd(s->fd, 1); |
| if (ret < 0) |
| return ret; |
| } |
| ret = send(s->fd, buf, size, 0); |
| return ret < 0 ? ff_neterrno() : ret; |
| } |
| |
| static int tcp_shutdown(URLContext *h, int flags) |
| { |
| TCPContext *s = h->priv_data; |
| int how; |
| |
| if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) { |
| how = SHUT_RDWR; |
| } else if (flags & AVIO_FLAG_WRITE) { |
| how = SHUT_WR; |
| } else { |
| how = SHUT_RD; |
| } |
| |
| return shutdown(s->fd, how); |
| } |
| |
| static int tcp_close(URLContext *h) |
| { |
| TCPContext *s = h->priv_data; |
| closesocket(s->fd); |
| return 0; |
| } |
| |
| static int tcp_get_file_handle(URLContext *h) |
| { |
| TCPContext *s = h->priv_data; |
| return s->fd; |
| } |
| |
| URLProtocol ff_tcp_protocol = { |
| .name = "tcp", |
| .url_open = tcp_open, |
| .url_read = tcp_read, |
| .url_write = tcp_write, |
| .url_close = tcp_close, |
| .url_get_file_handle = tcp_get_file_handle, |
| .url_shutdown = tcp_shutdown, |
| .priv_data_size = sizeof(TCPContext), |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |