| /* |
| * 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 <unistd.h> |
| #include "internal.h" |
| #include "network.h" |
| #include "os_support.h" |
| #if HAVE_SYS_SELECT_H |
| #include <sys/select.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, *ai, *cur_ai; |
| int port, fd = -1; |
| TCPContext *s = NULL; |
| fd_set wfds; |
| int fd_max, ret; |
| struct timeval tv; |
| socklen_t optlen; |
| char hostname[1024],proto[1024],path[1024]; |
| char portstr[10]; |
| |
| ff_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); |
| |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_family = AF_UNSPEC; |
| hints.ai_socktype = SOCK_STREAM; |
| snprintf(portstr, sizeof(portstr), "%d", port); |
| if (getaddrinfo(hostname, portstr, &hints, &ai)) |
| return AVERROR(EIO); |
| |
| cur_ai = ai; |
| |
| restart: |
| fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol); |
| if (fd < 0) |
| goto fail; |
| ff_socket_nonblock(fd, 1); |
| |
| redo: |
| ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen); |
| if (ret < 0) { |
| if (ff_neterrno() == FF_NETERROR(EINTR)) |
| goto redo; |
| if (ff_neterrno() != FF_NETERROR(EINPROGRESS) && |
| ff_neterrno() != FF_NETERROR(EAGAIN)) |
| goto fail; |
| |
| /* wait until we are connected or until abort */ |
| for(;;) { |
| if (url_interrupt_cb()) { |
| ret = AVERROR(EINTR); |
| goto fail1; |
| } |
| fd_max = fd; |
| FD_ZERO(&wfds); |
| FD_SET(fd, &wfds); |
| tv.tv_sec = 0; |
| tv.tv_usec = 100 * 1000; |
| ret = select(fd_max + 1, NULL, &wfds, NULL, &tv); |
| if (ret > 0 && FD_ISSET(fd, &wfds)) |
| break; |
| } |
| |
| /* test error */ |
| optlen = sizeof(ret); |
| getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen); |
| if (ret != 0) |
| goto fail; |
| } |
| s = av_malloc(sizeof(TCPContext)); |
| if (!s) { |
| freeaddrinfo(ai); |
| return AVERROR(ENOMEM); |
| } |
| h->priv_data = s; |
| 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; |
| } |
| ret = AVERROR(EIO); |
| 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 len, fd_max, ret; |
| fd_set rfds; |
| struct timeval tv; |
| |
| for (;;) { |
| if (url_interrupt_cb()) |
| return AVERROR(EINTR); |
| fd_max = s->fd; |
| FD_ZERO(&rfds); |
| FD_SET(s->fd, &rfds); |
| tv.tv_sec = 0; |
| tv.tv_usec = 100 * 1000; |
| ret = select(fd_max + 1, &rfds, NULL, NULL, &tv); |
| if (ret > 0 && FD_ISSET(s->fd, &rfds)) { |
| len = recv(s->fd, buf, size, 0); |
| if (len < 0) { |
| if (ff_neterrno() != FF_NETERROR(EINTR) && |
| ff_neterrno() != FF_NETERROR(EAGAIN)) |
| return AVERROR(ff_neterrno()); |
| } else return len; |
| } else if (ret < 0) { |
| if (ff_neterrno() == FF_NETERROR(EINTR)) |
| continue; |
| return -1; |
| } |
| } |
| } |
| |
| static int tcp_write(URLContext *h, uint8_t *buf, int size) |
| { |
| TCPContext *s = h->priv_data; |
| int ret, size1, fd_max, len; |
| fd_set wfds; |
| struct timeval tv; |
| |
| size1 = size; |
| while (size > 0) { |
| if (url_interrupt_cb()) |
| return AVERROR(EINTR); |
| fd_max = s->fd; |
| FD_ZERO(&wfds); |
| FD_SET(s->fd, &wfds); |
| tv.tv_sec = 0; |
| tv.tv_usec = 100 * 1000; |
| ret = select(fd_max + 1, NULL, &wfds, NULL, &tv); |
| if (ret > 0 && FD_ISSET(s->fd, &wfds)) { |
| len = send(s->fd, buf, size, 0); |
| if (len < 0) { |
| if (ff_neterrno() != FF_NETERROR(EINTR) && |
| ff_neterrno() != FF_NETERROR(EAGAIN)) |
| return AVERROR(ff_neterrno()); |
| continue; |
| } |
| size -= len; |
| buf += len; |
| } else if (ret < 0) { |
| if (ff_neterrno() == FF_NETERROR(EINTR)) |
| continue; |
| return -1; |
| } |
| } |
| return size1 - size; |
| } |
| |
| static int tcp_close(URLContext *h) |
| { |
| TCPContext *s = h->priv_data; |
| closesocket(s->fd); |
| av_free(s); |
| return 0; |
| } |
| |
| static int tcp_get_file_handle(URLContext *h) |
| { |
| TCPContext *s = h->priv_data; |
| return s->fd; |
| } |
| |
| URLProtocol tcp_protocol = { |
| "tcp", |
| tcp_open, |
| tcp_read, |
| tcp_write, |
| NULL, /* seek */ |
| tcp_close, |
| .url_get_file_handle = tcp_get_file_handle, |
| }; |