mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 01:56:41 +00:00
ecfff0e992
Without this patch a user a bit absent-minded may not notice that the connection doesn't work because the port is missing. Signed-off-by: Martin Storsjö <martin@martin.st>
331 lines
9.3 KiB
C
331 lines
9.3 KiB
C
/*
|
|
* SCTP protocol
|
|
* Copyright (c) 2012 Luca Barbato
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
*
|
|
* sctp url_protocol
|
|
*
|
|
* url syntax: sctp://host:port[?option=val...]
|
|
* option: 'listen' : listen for an incoming connection
|
|
* 'max_streams=n' : set the maximum number of streams
|
|
* 'reuse=1' : enable reusing the socket [TBD]
|
|
*
|
|
* by setting the maximum number of streams the protocol will use the
|
|
* first two bytes of the incoming/outgoing buffer to store the
|
|
* stream number of the packet being read/written.
|
|
* @see sctp_read
|
|
* @see sctp_write
|
|
*/
|
|
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/sctp.h>
|
|
|
|
#include "config.h"
|
|
|
|
#if HAVE_POLL_H
|
|
#include <poll.h>
|
|
#endif
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/parseutils.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "network.h"
|
|
#include "os_support.h"
|
|
#include "url.h"
|
|
|
|
/*
|
|
* The sctp_recvmsg and sctp_sendmsg functions are part of the user
|
|
* library that offers support
|
|
* for the SCTP kernel Implementation. The main purpose of this
|
|
* code is to provide the SCTP Socket API mappings for user
|
|
* application to interface with the SCTP in kernel.
|
|
*
|
|
* This implementation is based on the Socket API Extensions for SCTP
|
|
* defined in <draft-ietf-tsvwg-sctpsocket-10.txt>
|
|
*
|
|
* Copyright (c) 2003 International Business Machines, Corp.
|
|
*
|
|
* Written or modified by:
|
|
* Ryan Layer <rmlayer@us.ibm.com>
|
|
*/
|
|
|
|
static int ff_sctp_recvmsg(int s, void *msg, size_t len, struct sockaddr *from,
|
|
socklen_t *fromlen, struct sctp_sndrcvinfo *sinfo,
|
|
int *msg_flags)
|
|
{
|
|
int recvb;
|
|
struct iovec iov;
|
|
char incmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
|
|
struct msghdr inmsg = { 0 };
|
|
struct cmsghdr *cmsg = NULL;
|
|
|
|
iov.iov_base = msg;
|
|
iov.iov_len = len;
|
|
|
|
inmsg.msg_name = from;
|
|
inmsg.msg_namelen = fromlen ? *fromlen : 0;
|
|
inmsg.msg_iov = &iov;
|
|
inmsg.msg_iovlen = 1;
|
|
inmsg.msg_control = incmsg;
|
|
inmsg.msg_controllen = sizeof(incmsg);
|
|
|
|
if ((recvb = recvmsg(s, &inmsg, msg_flags ? *msg_flags : 0)) < 0)
|
|
return recvb;
|
|
|
|
if (fromlen)
|
|
*fromlen = inmsg.msg_namelen;
|
|
if (msg_flags)
|
|
*msg_flags = inmsg.msg_flags;
|
|
|
|
for (cmsg = CMSG_FIRSTHDR(&inmsg); cmsg != NULL;
|
|
cmsg = CMSG_NXTHDR(&inmsg, cmsg)) {
|
|
if ((IPPROTO_SCTP == cmsg->cmsg_level) &&
|
|
(SCTP_SNDRCV == cmsg->cmsg_type))
|
|
break;
|
|
}
|
|
|
|
/* Copy sinfo. */
|
|
if (cmsg)
|
|
memcpy(sinfo, CMSG_DATA(cmsg), sizeof(struct sctp_sndrcvinfo));
|
|
|
|
return recvb;
|
|
}
|
|
|
|
static int ff_sctp_send(int s, const void *msg, size_t len,
|
|
const struct sctp_sndrcvinfo *sinfo, int flags)
|
|
{
|
|
struct msghdr outmsg;
|
|
struct iovec iov;
|
|
|
|
outmsg.msg_name = NULL;
|
|
outmsg.msg_namelen = 0;
|
|
outmsg.msg_iov = &iov;
|
|
iov.iov_base = msg;
|
|
iov.iov_len = len;
|
|
outmsg.msg_iovlen = 1;
|
|
outmsg.msg_controllen = 0;
|
|
|
|
if (sinfo) {
|
|
char outcmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
|
|
struct cmsghdr *cmsg;
|
|
|
|
outmsg.msg_control = outcmsg;
|
|
outmsg.msg_controllen = sizeof(outcmsg);
|
|
outmsg.msg_flags = 0;
|
|
|
|
cmsg = CMSG_FIRSTHDR(&outmsg);
|
|
cmsg->cmsg_level = IPPROTO_SCTP;
|
|
cmsg->cmsg_type = SCTP_SNDRCV;
|
|
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
|
|
|
|
outmsg.msg_controllen = cmsg->cmsg_len;
|
|
memcpy(CMSG_DATA(cmsg), sinfo, sizeof(struct sctp_sndrcvinfo));
|
|
}
|
|
|
|
return sendmsg(s, &outmsg, flags);
|
|
}
|
|
|
|
typedef struct SCTPContext {
|
|
int fd;
|
|
int max_streams;
|
|
struct sockaddr_storage dest_addr;
|
|
socklen_t dest_addr_len;
|
|
} SCTPContext;
|
|
|
|
static int sctp_open(URLContext *h, const char *uri, int flags)
|
|
{
|
|
struct addrinfo *ai, *cur_ai;
|
|
struct addrinfo hints = { 0 };
|
|
struct sctp_event_subscribe event = { 0 };
|
|
struct sctp_initmsg initparams = { 0 };
|
|
int port;
|
|
int fd = -1;
|
|
SCTPContext *s = h->priv_data;
|
|
const char *p;
|
|
char buf[256];
|
|
int ret, listen_socket = 0;
|
|
char hostname[1024], proto[1024], path[1024];
|
|
char portstr[10];
|
|
|
|
av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
|
|
&port, path, sizeof(path), uri);
|
|
if (strcmp(proto, "sctp"))
|
|
return AVERROR(EINVAL);
|
|
if (port <= 0 || port >= 65536) {
|
|
av_log(s, AV_LOG_ERROR, "Port missing in uri\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
s->max_streams = 0;
|
|
p = strchr(uri, '?');
|
|
if (p) {
|
|
if (av_find_info_tag(buf, sizeof(buf), "listen", p))
|
|
listen_socket = 1;
|
|
if (av_find_info_tag(buf, sizeof(buf), "max_streams", p))
|
|
s->max_streams = strtol(buf, NULL, 10);
|
|
}
|
|
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
snprintf(portstr, sizeof(portstr), "%d", port);
|
|
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;
|
|
|
|
fd = socket(cur_ai->ai_family, SOCK_STREAM, IPPROTO_SCTP);
|
|
if (fd < 0)
|
|
goto fail;
|
|
|
|
s->dest_addr_len = sizeof(s->dest_addr);
|
|
|
|
if (listen_socket) {
|
|
int fd1;
|
|
ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
|
|
listen(fd, 100);
|
|
fd1 = accept(fd, NULL, NULL);
|
|
closesocket(fd);
|
|
fd = fd1;
|
|
} else
|
|
ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
|
|
|
|
ff_socket_nonblock(fd, 1);
|
|
|
|
event.sctp_data_io_event = 1;
|
|
/* TODO: Subscribe to more event types and handle them */
|
|
|
|
if (setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
|
|
sizeof(event)) != 0) {
|
|
av_log(h, AV_LOG_ERROR,
|
|
"SCTP ERROR: Unable to subscribe to events\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (s->max_streams) {
|
|
initparams.sinit_max_instreams = s->max_streams;
|
|
initparams.sinit_num_ostreams = s->max_streams;
|
|
if (setsockopt(fd, IPPROTO_SCTP, SCTP_INITMSG, &initparams,
|
|
sizeof(initparams)) < 0)
|
|
av_log(h, AV_LOG_ERROR,
|
|
"SCTP ERROR: Unable to initialize socket max streams %d\n",
|
|
s->max_streams);
|
|
}
|
|
|
|
h->priv_data = s;
|
|
h->is_streamed = 1;
|
|
s->fd = fd;
|
|
freeaddrinfo(ai);
|
|
return 0;
|
|
|
|
fail:
|
|
ret = AVERROR(EIO);
|
|
freeaddrinfo(ai);
|
|
return ret;
|
|
}
|
|
|
|
static int sctp_wait_fd(int fd, int write)
|
|
{
|
|
int ev = write ? POLLOUT : POLLIN;
|
|
struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
|
|
int ret;
|
|
|
|
ret = poll(&p, 1, 100);
|
|
return ret < 0 ? ff_neterrno() : p.revents & ev ? 0 : AVERROR(EAGAIN);
|
|
}
|
|
|
|
static int sctp_read(URLContext *h, uint8_t *buf, int size)
|
|
{
|
|
SCTPContext *s = h->priv_data;
|
|
int ret;
|
|
|
|
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
|
|
ret = sctp_wait_fd(s->fd, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (s->max_streams) {
|
|
/*StreamId is introduced as a 2byte code into the stream*/
|
|
struct sctp_sndrcvinfo info = { 0 };
|
|
ret = ff_sctp_recvmsg(s->fd, buf + 2, size - 2, NULL, 0, &info, 0);
|
|
AV_WB16(buf, info.sinfo_stream);
|
|
ret = ret < 0 ? ret : ret + 2;
|
|
} else
|
|
ret = recv(s->fd, buf, size, 0);
|
|
|
|
return ret < 0 ? ff_neterrno() : ret;
|
|
}
|
|
|
|
static int sctp_write(URLContext *h, const uint8_t *buf, int size)
|
|
{
|
|
SCTPContext *s = h->priv_data;
|
|
int ret;
|
|
|
|
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
|
|
ret = sctp_wait_fd(s->fd, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (s->max_streams) {
|
|
/*StreamId is introduced as a 2byte code into the stream*/
|
|
struct sctp_sndrcvinfo info = { 0 };
|
|
info.sinfo_stream = AV_RB16(buf);
|
|
if (info.sinfo_stream > s->max_streams)
|
|
abort();
|
|
ret = ff_sctp_send(s->fd, buf + 2, size - 2, &info, MSG_EOR);
|
|
} else
|
|
ret = send(s->fd, buf, size, 0);
|
|
|
|
return ret < 0 ? ff_neterrno() : ret;
|
|
}
|
|
|
|
static int sctp_close(URLContext *h)
|
|
{
|
|
SCTPContext *s = h->priv_data;
|
|
closesocket(s->fd);
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_get_file_handle(URLContext *h)
|
|
{
|
|
SCTPContext *s = h->priv_data;
|
|
return s->fd;
|
|
}
|
|
|
|
URLProtocol ff_sctp_protocol = {
|
|
.name = "sctp",
|
|
.url_open = sctp_open,
|
|
.url_read = sctp_read,
|
|
.url_write = sctp_write,
|
|
.url_close = sctp_close,
|
|
.url_get_file_handle = sctp_get_file_handle,
|
|
.priv_data_size = sizeof(SCTPContext),
|
|
.flags = URL_PROTOCOL_FLAG_NETWORK,
|
|
};
|