mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
5509bffa88
Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
502 lines
14 KiB
C
502 lines
14 KiB
C
/*
|
|
* UDP prototype streaming system
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; 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 <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#ifndef __BEOS__
|
|
# include <arpa/inet.h>
|
|
#else
|
|
# include "barpainet.h"
|
|
#endif
|
|
#include <netdb.h>
|
|
|
|
#ifndef IPV6_ADD_MEMBERSHIP
|
|
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
|
|
#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
|
|
#endif
|
|
|
|
typedef struct {
|
|
int udp_fd;
|
|
int ttl;
|
|
int is_multicast;
|
|
int local_port;
|
|
#ifndef CONFIG_IPV6
|
|
struct ip_mreq mreq;
|
|
struct sockaddr_in dest_addr;
|
|
#else
|
|
struct sockaddr_storage dest_addr;
|
|
size_t dest_addr_len;
|
|
#endif
|
|
} UDPContext;
|
|
|
|
#define UDP_TX_BUF_SIZE 32768
|
|
|
|
#ifdef CONFIG_IPV6
|
|
|
|
int udp_ipv6_is_multicast_address(const struct sockaddr *addr) {
|
|
if (addr->sa_family == AF_INET)
|
|
return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
|
|
if (addr->sa_family == AF_INET6)
|
|
return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
|
|
return -1;
|
|
}
|
|
|
|
int udp_ipv6_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
|
|
if (addr->sa_family == AF_INET) {
|
|
if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
|
|
perror("setsockopt(IP_MULTICAST_TTL)");
|
|
return -1;
|
|
}
|
|
}
|
|
if (addr->sa_family == AF_INET6) {
|
|
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
|
|
perror("setsockopt(IPV6_MULTICAST_HOPS)");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int udp_ipv6_join_multicast_group(int sockfd, struct sockaddr *addr) {
|
|
struct ip_mreq mreq;
|
|
struct ipv6_mreq mreq6;
|
|
if (addr->sa_family == AF_INET) {
|
|
mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
|
|
mreq.imr_interface.s_addr= INADDR_ANY;
|
|
if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
|
|
perror("setsockopt(IP_ADD_MEMBERSHIP)");
|
|
return -1;
|
|
}
|
|
}
|
|
if (addr->sa_family == AF_INET6) {
|
|
memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
|
|
mreq6.ipv6mr_interface= 0;
|
|
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
|
|
perror("setsockopt(IPV6_ADD_MEMBERSHIP)");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int udp_ipv6_leave_multicast_group(int sockfd, struct sockaddr *addr) {
|
|
struct ip_mreq mreq;
|
|
struct ipv6_mreq mreq6;
|
|
if (addr->sa_family == AF_INET) {
|
|
mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
|
|
mreq.imr_interface.s_addr= INADDR_ANY;
|
|
if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
|
|
perror("setsockopt(IP_DROP_MEMBERSHIP)");
|
|
return -1;
|
|
}
|
|
}
|
|
if (addr->sa_family == AF_INET6) {
|
|
memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
|
|
mreq6.ipv6mr_interface= 0;
|
|
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
|
|
perror("setsockopt(IPV6_DROP_MEMBERSHIP)");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
|
|
struct addrinfo hints, *res = 0;
|
|
int error;
|
|
char sport[16];
|
|
const char *node = 0, *service = 0;
|
|
|
|
if (port > 0) {
|
|
snprintf(sport, sizeof(sport), "%d", port);
|
|
service = sport;
|
|
}
|
|
if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
|
|
node = hostname;
|
|
}
|
|
if ((node) || (service)) {
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_socktype = type;
|
|
hints.ai_family = family;
|
|
hints.ai_flags = flags;
|
|
if ((error = getaddrinfo(node, service, &hints, &res))) {
|
|
av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
|
|
UDPContext *s = h->priv_data;
|
|
char hostname[256];
|
|
int port;
|
|
struct addrinfo *res0;
|
|
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
|
|
res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
|
|
if (res0 == 0) return AVERROR_IO;
|
|
memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
|
|
s->dest_addr_len = res0->ai_addrlen;
|
|
freeaddrinfo(res0);
|
|
return 0;
|
|
}
|
|
|
|
int udp_ipv6_set_local(URLContext *h) {
|
|
UDPContext *s = h->priv_data;
|
|
int udp_fd = -1;
|
|
struct sockaddr_storage clientaddr;
|
|
socklen_t addrlen;
|
|
char sbuf[NI_MAXSERV];
|
|
char hbuf[NI_MAXHOST];
|
|
struct addrinfo *res0 = NULL, *res = NULL;
|
|
|
|
if (s->local_port != 0) {
|
|
res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
|
|
if (res0 == 0)
|
|
goto fail;
|
|
for (res = res0; res; res=res->ai_next) {
|
|
udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
|
|
if (udp_fd > 0) break;
|
|
perror("socket");
|
|
}
|
|
} else {
|
|
udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
|
|
if (udp_fd < 0)
|
|
perror("socket");
|
|
}
|
|
|
|
if (udp_fd < 0)
|
|
goto fail;
|
|
|
|
if (s->local_port != 0) {
|
|
if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
|
|
perror("bind");
|
|
goto fail;
|
|
}
|
|
freeaddrinfo(res0);
|
|
res0 = NULL;
|
|
}
|
|
|
|
addrlen = sizeof(clientaddr);
|
|
if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
|
|
perror("getsockname");
|
|
goto fail;
|
|
}
|
|
|
|
if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
|
|
perror("getnameinfo");
|
|
goto fail;
|
|
}
|
|
|
|
s->local_port = strtol(sbuf, NULL, 10);
|
|
|
|
return udp_fd;
|
|
|
|
fail:
|
|
if (udp_fd >= 0)
|
|
#ifdef CONFIG_BEOS_NETSERVER
|
|
closesocket(udp_fd);
|
|
#else
|
|
close(udp_fd);
|
|
#endif
|
|
if(res0)
|
|
freeaddrinfo(res0);
|
|
return -1;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
/**
|
|
* If no filename is given to av_open_input_file because you want to
|
|
* get the local port first, then you must call this function to set
|
|
* the remote server address.
|
|
*
|
|
* url syntax: udp://host:port[?option=val...]
|
|
* option: 'multicast=1' : enable multicast
|
|
* 'ttl=n' : set the ttl value (for multicast only)
|
|
* 'localport=n' : set the local port
|
|
* 'pkt_size=n' : set max packet size
|
|
*
|
|
* @param s1 media file context
|
|
* @param uri of the remote server
|
|
* @return zero if no error.
|
|
*/
|
|
int udp_set_remote_url(URLContext *h, const char *uri)
|
|
{
|
|
#ifdef CONFIG_IPV6
|
|
return udp_ipv6_set_remote_url(h, uri);
|
|
#else
|
|
UDPContext *s = h->priv_data;
|
|
char hostname[256];
|
|
int port;
|
|
|
|
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
|
|
|
|
/* set the destination address */
|
|
if (resolve_host(&s->dest_addr.sin_addr, hostname) < 0)
|
|
return AVERROR_IO;
|
|
s->dest_addr.sin_family = AF_INET;
|
|
s->dest_addr.sin_port = htons(port);
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Return the local port used by the UDP connexion
|
|
* @param s1 media file context
|
|
* @return the local port number
|
|
*/
|
|
int udp_get_local_port(URLContext *h)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
return s->local_port;
|
|
}
|
|
|
|
/**
|
|
* Return the udp file handle for select() usage to wait for several RTP
|
|
* streams at the same time.
|
|
* @param h media file context
|
|
*/
|
|
int udp_get_file_handle(URLContext *h)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
return s->udp_fd;
|
|
}
|
|
|
|
/* put it in UDP context */
|
|
/* return non zero if error */
|
|
static int udp_open(URLContext *h, const char *uri, int flags)
|
|
{
|
|
char hostname[1024];
|
|
int port, udp_fd = -1, tmp;
|
|
UDPContext *s = NULL;
|
|
int is_output;
|
|
const char *p;
|
|
char buf[256];
|
|
#ifndef CONFIG_IPV6
|
|
struct sockaddr_in my_addr, my_addr1;
|
|
int len;
|
|
#endif
|
|
|
|
h->is_streamed = 1;
|
|
h->max_packet_size = 1472;
|
|
|
|
is_output = (flags & URL_WRONLY);
|
|
|
|
s = av_malloc(sizeof(UDPContext));
|
|
if (!s)
|
|
return -ENOMEM;
|
|
|
|
h->priv_data = s;
|
|
s->ttl = 16;
|
|
s->is_multicast = 0;
|
|
s->local_port = 0;
|
|
p = strchr(uri, '?');
|
|
if (p) {
|
|
s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
|
|
if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
|
|
s->ttl = strtol(buf, NULL, 10);
|
|
}
|
|
if (find_info_tag(buf, sizeof(buf), "localport", p)) {
|
|
s->local_port = strtol(buf, NULL, 10);
|
|
}
|
|
if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
|
|
h->max_packet_size = strtol(buf, NULL, 10);
|
|
}
|
|
}
|
|
|
|
/* fill the dest addr */
|
|
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
|
|
|
|
/* XXX: fix url_split */
|
|
if (hostname[0] == '\0' || hostname[0] == '?') {
|
|
/* only accepts null hostname if input */
|
|
if (s->is_multicast || (flags & URL_WRONLY))
|
|
goto fail;
|
|
} else {
|
|
udp_set_remote_url(h, uri);
|
|
}
|
|
|
|
#ifndef CONFIG_IPV6
|
|
udp_fd = socket(PF_INET, SOCK_DGRAM, 0);
|
|
if (udp_fd < 0)
|
|
goto fail;
|
|
|
|
my_addr.sin_family = AF_INET;
|
|
my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
|
|
if (s->is_multicast && !(h->flags & URL_WRONLY)) {
|
|
/* special case: the bind must be done on the multicast address port */
|
|
my_addr.sin_port = s->dest_addr.sin_port;
|
|
} else {
|
|
my_addr.sin_port = htons(s->local_port);
|
|
}
|
|
|
|
/* the bind is needed to give a port to the socket now */
|
|
if (bind(udp_fd,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
|
|
goto fail;
|
|
|
|
len = sizeof(my_addr1);
|
|
getsockname(udp_fd, (struct sockaddr *)&my_addr1, &len);
|
|
s->local_port = ntohs(my_addr1.sin_port);
|
|
|
|
#ifndef CONFIG_BEOS_NETSERVER
|
|
if (s->is_multicast) {
|
|
if (h->flags & URL_WRONLY) {
|
|
/* output */
|
|
if (setsockopt(udp_fd, IPPROTO_IP, IP_MULTICAST_TTL,
|
|
&s->ttl, sizeof(s->ttl)) < 0) {
|
|
perror("IP_MULTICAST_TTL");
|
|
goto fail;
|
|
}
|
|
} else {
|
|
/* input */
|
|
memset(&s->mreq, 0, sizeof(s->mreq));
|
|
s->mreq.imr_multiaddr = s->dest_addr.sin_addr;
|
|
s->mreq.imr_interface.s_addr = htonl (INADDR_ANY);
|
|
if (setsockopt(udp_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
|
|
&s->mreq, sizeof(s->mreq)) < 0) {
|
|
perror("rtp: IP_ADD_MEMBERSHIP");
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#else
|
|
if (s->is_multicast && !(h->flags & URL_WRONLY))
|
|
s->local_port = port;
|
|
udp_fd = udp_ipv6_set_local(h);
|
|
if (udp_fd < 0)
|
|
goto fail;
|
|
#ifndef CONFIG_BEOS_NETSERVER
|
|
if (s->is_multicast) {
|
|
if (h->flags & URL_WRONLY) {
|
|
if (udp_ipv6_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
|
|
goto fail;
|
|
} else {
|
|
if (udp_ipv6_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
if (is_output) {
|
|
/* limit the tx buf size to limit latency */
|
|
tmp = UDP_TX_BUF_SIZE;
|
|
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
|
|
perror("setsockopt sndbuf");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
s->udp_fd = udp_fd;
|
|
return 0;
|
|
fail:
|
|
if (udp_fd >= 0)
|
|
#ifdef CONFIG_BEOS_NETSERVER
|
|
closesocket(udp_fd);
|
|
#else
|
|
close(udp_fd);
|
|
#endif
|
|
av_free(s);
|
|
return AVERROR_IO;
|
|
}
|
|
|
|
static int udp_read(URLContext *h, uint8_t *buf, int size)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
#ifndef CONFIG_IPV6
|
|
struct sockaddr_in from;
|
|
#else
|
|
struct sockaddr_storage from;
|
|
#endif
|
|
int from_len, len;
|
|
|
|
for(;;) {
|
|
from_len = sizeof(from);
|
|
len = recvfrom (s->udp_fd, buf, size, 0,
|
|
(struct sockaddr *)&from, &from_len);
|
|
if (len < 0) {
|
|
if (errno != EAGAIN && errno != EINTR)
|
|
return AVERROR_IO;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static int udp_write(URLContext *h, uint8_t *buf, int size)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
int ret;
|
|
|
|
for(;;) {
|
|
ret = sendto (s->udp_fd, buf, size, 0,
|
|
(struct sockaddr *) &s->dest_addr,
|
|
#ifndef CONFIG_IPV6
|
|
sizeof (s->dest_addr));
|
|
#else
|
|
s->dest_addr_len);
|
|
#endif
|
|
if (ret < 0) {
|
|
if (errno != EINTR && errno != EAGAIN)
|
|
return AVERROR_IO;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
return size;
|
|
}
|
|
|
|
static int udp_close(URLContext *h)
|
|
{
|
|
UDPContext *s = h->priv_data;
|
|
|
|
#ifndef CONFIG_BEOS_NETSERVER
|
|
#ifndef CONFIG_IPV6
|
|
if (s->is_multicast && !(h->flags & URL_WRONLY)) {
|
|
if (setsockopt(s->udp_fd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
|
|
&s->mreq, sizeof(s->mreq)) < 0) {
|
|
perror("IP_DROP_MEMBERSHIP");
|
|
}
|
|
}
|
|
#else
|
|
if (s->is_multicast && !(h->flags & URL_WRONLY))
|
|
udp_ipv6_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
|
|
#endif
|
|
close(s->udp_fd);
|
|
#else
|
|
closesocket(s->udp_fd);
|
|
#endif
|
|
av_free(s);
|
|
return 0;
|
|
}
|
|
|
|
URLProtocol udp_protocol = {
|
|
"udp",
|
|
udp_open,
|
|
udp_read,
|
|
udp_write,
|
|
NULL, /* seek */
|
|
udp_close,
|
|
};
|