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153 lines
3.5 KiB
C
153 lines
3.5 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 library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avformat.h"
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#include <unistd.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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typedef struct TCPContext {
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int fd;
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} TCPContext;
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/* resolve host with also IP address parsing */
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int resolve_host(struct in_addr *sin_addr, const char *hostname)
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{
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struct hostent *hp;
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if ((inet_aton(hostname, sin_addr)) == 0) {
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hp = gethostbyname(hostname);
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if (!hp)
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return -1;
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memcpy (sin_addr, hp->h_addr, sizeof(struct in_addr));
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}
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return 0;
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}
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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;
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TCPContext *s;
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const char *p;
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s = av_malloc(sizeof(TCPContext));
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if (!s)
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return -ENOMEM;
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h->priv_data = s;
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p = uri;
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if (!strstart(p, "tcp://", &p))
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goto fail;
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q = hostname;
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while (*p != ':' && *p != '/' && *p != '\0') {
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if ((q - hostname) < sizeof(hostname) - 1)
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*q++ = *p;
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p++;
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}
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*q = '\0';
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if (*p != ':')
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goto fail;
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p++;
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port = strtoul(p, (char **)&p, 10);
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if (port <= 0 || port >= 65536)
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goto fail;
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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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fd = socket(PF_INET, SOCK_STREAM, 0);
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if (fd < 0)
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goto fail;
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if (connect(fd, (struct sockaddr *)&dest_addr,
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sizeof(dest_addr)) < 0)
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goto fail;
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s->fd = fd;
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return 0;
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fail:
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if (fd >= 0)
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close(fd);
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av_free(s);
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return -EIO;
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}
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static int tcp_read(URLContext *h, UINT8 *buf, int size)
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{
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TCPContext *s = h->priv_data;
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int size1, len;
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size1 = size;
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while (size > 0) {
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len = read (s->fd, buf, size);
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if (len < 0) {
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if (errno != EINTR && errno != EAGAIN)
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return -errno;
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else
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continue;
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} else if (len == 0) {
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break;
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}
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size -= len;
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buf += len;
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}
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return size1 - size;
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}
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static int tcp_write(URLContext *h, UINT8 *buf, int size)
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{
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TCPContext *s = h->priv_data;
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int ret, size1;
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size1 = size;
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while (size > 0) {
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ret = write (s->fd, buf, size);
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if (ret < 0 && errno != EINTR && errno != EAGAIN)
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return -errno;
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size -= ret;
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buf += ret;
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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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close(s->fd);
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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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};
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