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ffmpeg / libavformat / tcp.c @ 3abe5fbd

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1 171bbb03 Fabrice Bellard
/*
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 * TCP protocol
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 * Copyright (c) 2002 Fabrice Bellard.
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 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8 171bbb03 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 171bbb03 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 171bbb03 Fabrice Bellard
 * 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
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * 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>
23 42572ef5 Ramiro Polla
#include "network.h"
24 087b3272 Luca Abeni
#include "os_support.h"
25 09787fb8 Fabrice Bellard
#include <sys/time.h>
26 171bbb03 Fabrice Bellard
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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 sockaddr_in dest_addr;
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    char hostname[1024], *q;
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    int port, fd = -1;
37 88730be6 Måns Rullgård
    TCPContext *s = NULL;
38 09787fb8 Fabrice Bellard
    fd_set wfds;
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    int fd_max, ret;
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    struct timeval tv;
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    socklen_t optlen;
42 6ba5cbc6 Petr Doubek
    char proto[1024],path[1024],tmp[1024];  // PETR: protocol and path strings
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    url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
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      &port, path, sizeof(path), uri);  // PETR: use url_split
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    if (strcmp(proto,"tcp")) goto fail; // PETR: check protocol
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    if ((q = strchr(hostname,'@'))) { strcpy(tmp,q+1); strcpy(hostname,tmp); } // PETR: take only the part after '@' for tcp protocol
48 115329f1 Diego Biurrun
49 171bbb03 Fabrice Bellard
    s = av_malloc(sizeof(TCPContext));
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    if (!s)
51 8fa36ae0 François Revol
        return AVERROR(ENOMEM);
52 171bbb03 Fabrice Bellard
    h->priv_data = s;
53 115329f1 Diego Biurrun
54 171bbb03 Fabrice Bellard
    if (port <= 0 || port >= 65536)
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        goto fail;
56 115329f1 Diego Biurrun
57 1642cb6b Ramiro Polla
    if(!ff_network_init())
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        return AVERROR(EIO);
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60 171bbb03 Fabrice Bellard
    dest_addr.sin_family = AF_INET;
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    dest_addr.sin_port = htons(port);
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    if (resolve_host(&dest_addr.sin_addr, hostname) < 0)
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        goto fail;
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65 b5cccea0 Alex Beregszaszi
    fd = socket(AF_INET, SOCK_STREAM, 0);
66 171bbb03 Fabrice Bellard
    if (fd < 0)
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        goto fail;
68 ba472aaf Alex Beregszaszi
    ff_socket_nonblock(fd, 1);
69 115329f1 Diego Biurrun
70 09787fb8 Fabrice Bellard
 redo:
71 115329f1 Diego Biurrun
    ret = connect(fd, (struct sockaddr *)&dest_addr,
72 09787fb8 Fabrice Bellard
                  sizeof(dest_addr));
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    if (ret < 0) {
74 8da4034f Alex Beregszaszi
        if (ff_neterrno() == FF_NETERROR(EINTR))
75 09787fb8 Fabrice Bellard
            goto redo;
76 85060fe6 Ramiro Polla
        if (ff_neterrno() != FF_NETERROR(EINPROGRESS) &&
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            ff_neterrno() != FF_NETERROR(EAGAIN))
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            goto fail;
79 171bbb03 Fabrice Bellard
80 09787fb8 Fabrice Bellard
        /* wait until we are connected or until abort */
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        for(;;) {
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            if (url_interrupt_cb()) {
83 8fa36ae0 François Revol
                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_SET(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(fd, &wfds))
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                break;
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        }
95 115329f1 Diego Biurrun
96 09787fb8 Fabrice Bellard
        /* 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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            goto fail;
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    }
102 171bbb03 Fabrice Bellard
    s->fd = fd;
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    return 0;
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 fail:
106 6f3e0b21 Panagiotis Issaris
    ret = AVERROR(EIO);
107 09787fb8 Fabrice Bellard
 fail1:
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    if (fd >= 0)
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        closesocket(fd);
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    av_free(s);
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    return ret;
112 171bbb03 Fabrice Bellard
}
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114 0c1a9eda Zdenek Kabelac
static int tcp_read(URLContext *h, uint8_t *buf, int size)
115 171bbb03 Fabrice Bellard
{
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    TCPContext *s = h->priv_data;
117 b51469a0 Leon van Stuivenberg
    int len, fd_max, ret;
118 09787fb8 Fabrice Bellard
    fd_set rfds;
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    struct timeval tv;
120 171bbb03 Fabrice Bellard
121 9eef2b77 Michael Niedermayer
    for (;;) {
122 09787fb8 Fabrice Bellard
        if (url_interrupt_cb())
123 8fa36ae0 François Revol
            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;
129 b51469a0 Leon van Stuivenberg
        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) {
133 8da4034f Alex Beregszaszi
                if (ff_neterrno() != FF_NETERROR(EINTR) &&
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                    ff_neterrno() != FF_NETERROR(EAGAIN))
135 8fa36ae0 François Revol
                    return AVERROR(errno);
136 b51469a0 Leon van Stuivenberg
            } else return len;
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        } else if (ret < 0) {
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            return -1;
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        }
140 171bbb03 Fabrice Bellard
    }
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}
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143 0c1a9eda Zdenek Kabelac
static int tcp_write(URLContext *h, uint8_t *buf, int size)
144 171bbb03 Fabrice Bellard
{
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    TCPContext *s = h->priv_data;
146 b51469a0 Leon van Stuivenberg
    int ret, size1, fd_max, len;
147 09787fb8 Fabrice Bellard
    fd_set wfds;
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    struct timeval tv;
149 171bbb03 Fabrice Bellard
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    size1 = size;
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    while (size > 0) {
152 09787fb8 Fabrice Bellard
        if (url_interrupt_cb())
153 8fa36ae0 François Revol
            return AVERROR(EINTR);
154 09787fb8 Fabrice Bellard
        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;
159 b51469a0 Leon van Stuivenberg
        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) {
163 8da4034f Alex Beregszaszi
                if (ff_neterrno() != FF_NETERROR(EINTR) &&
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                    ff_neterrno() != FF_NETERROR(EAGAIN))
165 8fa36ae0 François Revol
                    return AVERROR(errno);
166 b51469a0 Leon van Stuivenberg
                continue;
167 6c8e0d4d Philip Gladstone
            }
168 b51469a0 Leon van Stuivenberg
            size -= len;
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            buf += len;
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        } else if (ret < 0) {
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            return -1;
172 6c8e0d4d Philip Gladstone
        }
173 171bbb03 Fabrice Bellard
    }
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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;
180 9ddd71fc François Revol
    closesocket(s->fd);
181 1642cb6b Ramiro Polla
    ff_network_close();
182 171bbb03 Fabrice Bellard
    av_free(s);
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    return 0;
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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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};