diff ffmpeg/libavformat/tcp.c @ 11:f445c3017523

new files

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavformat/tcp.c	Sun Apr 21 11:16:23 2013 +0200
@@ -0,0 +1,282 @@
+/*
+ * 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 "libavutil/parseutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/time.h"
+#include "internal.h"
+#include "network.h"
+#include "os_support.h"
+#include "url.h"
+#if HAVE_POLL_H
+#include <poll.h>
+#endif
+
+typedef struct TCPContext {
+    const AVClass *class;
+    int fd;
+    int listen;
+    int rw_timeout;
+    int listen_timeout;
+} TCPContext;
+
+#define OFFSET(x) offsetof(TCPContext, x)
+#define D AV_OPT_FLAG_DECODING_PARAM
+#define E AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+{"listen", "listen on port instead of connecting", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
+{"timeout", "timeout of socket i/o operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
+{"listen_timeout", "connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
+{NULL}
+};
+
+static const AVClass tcp_context_class = {
+    .class_name = "tcp",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+/* return non zero if error */
+static int tcp_open(URLContext *h, const char *uri, int flags)
+{
+    struct addrinfo hints = { 0 }, *ai, *cur_ai;
+    int port, fd = -1;
+    TCPContext *s = h->priv_data;
+    const char *p;
+    char buf[256];
+    int ret;
+    socklen_t optlen;
+    char hostname[1024],proto[1024],path[1024];
+    char portstr[10];
+    h->rw_timeout = 5000000;
+
+    av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
+        &port, path, sizeof(path), uri);
+    if (strcmp(proto, "tcp"))
+        return AVERROR(EINVAL);
+    if (port <= 0 || port >= 65536) {
+        av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
+        return AVERROR(EINVAL);
+    }
+    p = strchr(uri, '?');
+    if (p) {
+        if (av_find_info_tag(buf, sizeof(buf), "listen", p))
+            s->listen = 1;
+        if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
+            s->rw_timeout = strtol(buf, NULL, 10);
+        }
+        if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
+            s->listen_timeout = strtol(buf, NULL, 10);
+        }
+    }
+    h->rw_timeout = s->rw_timeout;
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+    snprintf(portstr, sizeof(portstr), "%d", port);
+    if (s->listen)
+        hints.ai_flags |= AI_PASSIVE;
+    if (!hostname[0])
+        ret = getaddrinfo(NULL, portstr, &hints, &ai);
+    else
+        ret = getaddrinfo(hostname, portstr, &hints, &ai);
+    if (ret) {
+        av_log(h, AV_LOG_ERROR,
+               "Failed to resolve hostname %s: %s\n",
+               hostname, gai_strerror(ret));
+        return AVERROR(EIO);
+    }
+
+    cur_ai = ai;
+
+ restart:
+    ret = AVERROR(EIO);
+    fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
+    if (fd < 0)
+        goto fail;
+
+    if (s->listen) {
+        int fd1;
+        int reuse = 1;
+        struct pollfd lp = { fd, POLLIN, 0 };
+        setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
+        ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
+        if (ret) {
+            ret = ff_neterrno();
+            goto fail1;
+        }
+        ret = listen(fd, 1);
+        if (ret) {
+            ret = ff_neterrno();
+            goto fail1;
+        }
+        ret = poll(&lp, 1, s->listen_timeout >= 0 ? s->listen_timeout : -1);
+        if (ret <= 0) {
+            ret = AVERROR(ETIMEDOUT);
+            goto fail1;
+        }
+        fd1 = accept(fd, NULL, NULL);
+        if (fd1 < 0) {
+            ret = ff_neterrno();
+            goto fail1;
+        }
+        closesocket(fd);
+        fd = fd1;
+        ff_socket_nonblock(fd, 1);
+    } else {
+ redo:
+        ff_socket_nonblock(fd, 1);
+        ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
+    }
+
+    if (ret < 0) {
+        struct pollfd p = {fd, POLLOUT, 0};
+        int64_t wait_started;
+        ret = ff_neterrno();
+        if (ret == AVERROR(EINTR)) {
+            if (ff_check_interrupt(&h->interrupt_callback)) {
+                ret = AVERROR_EXIT;
+                goto fail1;
+            }
+            goto redo;
+        }
+        if (ret != AVERROR(EINPROGRESS) &&
+            ret != AVERROR(EAGAIN))
+            goto fail;
+
+        /* wait until we are connected or until abort */
+        wait_started = av_gettime();
+        do {
+            if (ff_check_interrupt(&h->interrupt_callback)) {
+                ret = AVERROR_EXIT;
+                goto fail1;
+            }
+            ret = poll(&p, 1, 100);
+            if (ret > 0)
+                break;
+        } while (!h->rw_timeout || (av_gettime() - wait_started < h->rw_timeout));
+        if (ret <= 0) {
+            ret = AVERROR(ETIMEDOUT);
+            goto fail;
+        }
+        /* test error */
+        optlen = sizeof(ret);
+        if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen))
+            ret = AVUNERROR(ff_neterrno());
+        if (ret != 0) {
+            char errbuf[100];
+            ret = AVERROR(ret);
+            av_strerror(ret, errbuf, sizeof(errbuf));
+            av_log(h, AV_LOG_ERROR,
+                   "TCP connection to %s:%d failed: %s\n",
+                   hostname, port, errbuf);
+            goto fail;
+        }
+    }
+    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;
+    }
+ 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 ret;
+
+    if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+        ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
+        if (ret)
+            return ret;
+    }
+    ret = recv(s->fd, buf, size, 0);
+    return ret < 0 ? ff_neterrno() : ret;
+}
+
+static int tcp_write(URLContext *h, const uint8_t *buf, int size)
+{
+    TCPContext *s = h->priv_data;
+    int ret;
+
+    if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+        ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
+        if (ret)
+            return ret;
+    }
+    ret = send(s->fd, buf, size, 0);
+    return ret < 0 ? ff_neterrno() : ret;
+}
+
+static int tcp_shutdown(URLContext *h, int flags)
+{
+    TCPContext *s = h->priv_data;
+    int how;
+
+    if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
+        how = SHUT_RDWR;
+    } else if (flags & AVIO_FLAG_WRITE) {
+        how = SHUT_WR;
+    } else {
+        how = SHUT_RD;
+    }
+
+    return shutdown(s->fd, how);
+}
+
+static int tcp_close(URLContext *h)
+{
+    TCPContext *s = h->priv_data;
+    closesocket(s->fd);
+    return 0;
+}
+
+static int tcp_get_file_handle(URLContext *h)
+{
+    TCPContext *s = h->priv_data;
+    return s->fd;
+}
+
+URLProtocol ff_tcp_protocol = {
+    .name                = "tcp",
+    .url_open            = tcp_open,
+    .url_read            = tcp_read,
+    .url_write           = tcp_write,
+    .url_close           = tcp_close,
+    .url_get_file_handle = tcp_get_file_handle,
+    .url_shutdown        = tcp_shutdown,
+    .priv_data_size      = sizeof(TCPContext),
+    .priv_data_class     = &tcp_context_class,
+    .flags               = URL_PROTOCOL_FLAG_NETWORK,
+};