/* * 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 "network.h" #include <sys/time.h> #include <fcntl.h> typedef struct TCPContext { int fd; } TCPContext; /* resolve host with also IP address parsing */ int resolve_host(struct in_addr *sin_addr, const char *hostname) { struct hostent *hp; if ((inet_aton(hostname, sin_addr)) == 0) { hp = gethostbyname(hostname); if (!hp) return -1; memcpy (sin_addr, hp->h_addr, sizeof(struct in_addr)); } return 0; } /* return non zero if error */ static int tcp_open(URLContext *h, const char *uri, int flags) { struct sockaddr_in dest_addr; char hostname[1024], *q; int port, fd = -1; TCPContext *s = NULL; fd_set wfds; int fd_max, ret; struct timeval tv; socklen_t optlen; char proto[1024],path[1024],tmp[1024]; // PETR: protocol and path strings url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port, path, sizeof(path), uri); // PETR: use url_split if (strcmp(proto,"tcp")) goto fail; // PETR: check protocol if ((q = strchr(hostname,'@'))) { strcpy(tmp,q+1); strcpy(hostname,tmp); } // PETR: take only the part after '@' for tcp protocol s = av_malloc(sizeof(TCPContext)); if (!s) return AVERROR(ENOMEM); h->priv_data = s; if (port <= 0 || port >= 65536) goto fail; dest_addr.sin_family = AF_INET; dest_addr.sin_port = htons(port); if (resolve_host(&dest_addr.sin_addr, hostname) < 0) goto fail; fd = socket(PF_INET, SOCK_STREAM, 0); if (fd < 0) goto fail; fcntl(fd, F_SETFL, O_NONBLOCK); redo: ret = connect(fd, (struct sockaddr *)&dest_addr, sizeof(dest_addr)); if (ret < 0) { if (errno == EINTR) goto redo; if (errno != EINPROGRESS) 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->fd = fd; return 0; fail: ret = AVERROR_IO; fail1: if (fd >= 0) closesocket(fd); av_free(s); 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 (errno != EINTR && errno != EAGAIN) return AVERROR(errno); } else return len; } else if (ret < 0) { 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 (errno != EINTR && errno != EAGAIN) return AVERROR(errno); continue; } size -= len; buf += len; } else if (ret < 0) { return -1; } } return size1 - size; } static int tcp_close(URLContext *h) { TCPContext *s = h->priv_data; closesocket(s->fd); av_free(s); return 0; } URLProtocol tcp_protocol = { "tcp", tcp_open, tcp_read, tcp_write, NULL, /* seek */ tcp_close, };