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![Ronald S. Bultje](/assets/img/avatar_default.png)
already does AVERROR(). Originally committed as revision 25671 to svn://svn.ffmpeg.org/ffmpeg/trunk
227 lines
6.1 KiB
C
227 lines
6.1 KiB
C
/*
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* TCP protocol
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* Copyright (c) 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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#include "avformat.h"
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#include <unistd.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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#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include <sys/time.h>
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typedef struct TCPContext {
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int fd;
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} TCPContext;
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/* return non zero if error */
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static int tcp_open(URLContext *h, const char *uri, int flags)
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{
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struct addrinfo hints, *ai, *cur_ai;
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int port, fd = -1;
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TCPContext *s = NULL;
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fd_set wfds, efds;
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int fd_max, ret;
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struct timeval tv;
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socklen_t optlen;
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char hostname[1024],proto[1024],path[1024];
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char portstr[10];
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av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
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&port, path, sizeof(path), uri);
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if (strcmp(proto,"tcp") || port <= 0 || port >= 65536)
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return AVERROR(EINVAL);
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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snprintf(portstr, sizeof(portstr), "%d", port);
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ret = getaddrinfo(hostname, portstr, &hints, &ai);
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if (ret) {
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av_log(NULL, AV_LOG_ERROR,
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"Failed to resolve hostname %s: %s\n",
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hostname, gai_strerror(ret));
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return AVERROR(EIO);
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}
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cur_ai = ai;
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restart:
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fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
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if (fd < 0)
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goto fail;
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ff_socket_nonblock(fd, 1);
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redo:
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ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
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if (ret < 0) {
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if (ff_neterrno() == FF_NETERROR(EINTR))
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goto redo;
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if (ff_neterrno() != FF_NETERROR(EINPROGRESS) &&
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ff_neterrno() != FF_NETERROR(EAGAIN))
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goto fail;
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/* wait until we are connected or until abort */
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for(;;) {
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if (url_interrupt_cb()) {
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ret = AVERROR(EINTR);
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goto fail1;
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}
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fd_max = fd;
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FD_ZERO(&wfds);
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FD_ZERO(&efds);
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FD_SET(fd, &wfds);
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FD_SET(fd, &efds);
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tv.tv_sec = 0;
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tv.tv_usec = 100 * 1000;
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ret = select(fd_max + 1, NULL, &wfds, &efds, &tv);
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if (ret > 0 && (FD_ISSET(fd, &wfds) || FD_ISSET(fd, &efds)))
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break;
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}
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/* test error */
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optlen = sizeof(ret);
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getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen);
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if (ret != 0) {
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av_log(NULL, AV_LOG_ERROR,
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"TCP connection to %s:%d failed: %s\n",
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hostname, port, strerror(ret));
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goto fail;
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}
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}
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s = av_malloc(sizeof(TCPContext));
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if (!s) {
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freeaddrinfo(ai);
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return AVERROR(ENOMEM);
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}
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h->priv_data = s;
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h->is_streamed = 1;
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s->fd = fd;
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freeaddrinfo(ai);
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return 0;
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fail:
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if (cur_ai->ai_next) {
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/* Retry with the next sockaddr */
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cur_ai = cur_ai->ai_next;
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if (fd >= 0)
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closesocket(fd);
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goto restart;
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}
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ret = AVERROR(EIO);
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fail1:
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if (fd >= 0)
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closesocket(fd);
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freeaddrinfo(ai);
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return ret;
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}
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static int tcp_read(URLContext *h, uint8_t *buf, int size)
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{
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TCPContext *s = h->priv_data;
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int len, fd_max, ret;
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fd_set rfds;
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struct timeval tv;
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for (;;) {
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if (url_interrupt_cb())
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return AVERROR(EINTR);
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fd_max = s->fd;
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FD_ZERO(&rfds);
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FD_SET(s->fd, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 100 * 1000;
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ret = select(fd_max + 1, &rfds, NULL, NULL, &tv);
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if (ret > 0 && FD_ISSET(s->fd, &rfds)) {
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len = recv(s->fd, buf, size, 0);
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if (len < 0) {
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if (ff_neterrno() != FF_NETERROR(EINTR) &&
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ff_neterrno() != FF_NETERROR(EAGAIN))
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return ff_neterrno();
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} else return len;
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} else if (ret < 0) {
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if (ff_neterrno() == FF_NETERROR(EINTR))
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continue;
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return -1;
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}
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}
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}
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static int tcp_write(URLContext *h, const uint8_t *buf, int size)
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{
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TCPContext *s = h->priv_data;
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int ret, size1, fd_max, len;
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fd_set wfds;
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struct timeval tv;
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size1 = size;
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while (size > 0) {
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if (url_interrupt_cb())
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return AVERROR(EINTR);
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fd_max = s->fd;
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FD_ZERO(&wfds);
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FD_SET(s->fd, &wfds);
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tv.tv_sec = 0;
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tv.tv_usec = 100 * 1000;
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ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
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if (ret > 0 && FD_ISSET(s->fd, &wfds)) {
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len = send(s->fd, buf, size, 0);
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if (len < 0) {
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if (ff_neterrno() != FF_NETERROR(EINTR) &&
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ff_neterrno() != FF_NETERROR(EAGAIN))
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return ff_neterrno();
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continue;
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}
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size -= len;
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buf += len;
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} else if (ret < 0) {
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if (ff_neterrno() == FF_NETERROR(EINTR))
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continue;
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return -1;
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}
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}
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return size1 - size;
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}
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static int tcp_close(URLContext *h)
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{
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TCPContext *s = h->priv_data;
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closesocket(s->fd);
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av_free(s);
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return 0;
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}
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static int tcp_get_file_handle(URLContext *h)
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{
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TCPContext *s = h->priv_data;
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return s->fd;
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}
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URLProtocol tcp_protocol = {
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"tcp",
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tcp_open,
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tcp_read,
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tcp_write,
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NULL, /* seek */
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tcp_close,
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.url_get_file_handle = tcp_get_file_handle,
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};
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