/**
* 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.
*
* @param s1 media file context
* @param uri of the remote server
* @return zero if no error.
*/
int rtp_set_remote_url(URLContext *h, const char *uri)
{
RTPContext *s = h->priv_data;
char hostname[256];
int port;
char buf[1024];
char path[1024];
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port,
path, sizeof(path), uri);
snprintf(buf, sizeof(buf), "udp://%s:%d%s", hostname, port, path);
udp_set_remote_url(s->rtp_hd, buf);
snprintf(buf, sizeof(buf), "udp://%s:%d%s", hostname, port + 1, path);
udp_set_remote_url(s->rtcp_hd, buf);
return 0;
}
/* 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, bind_ret = -1;
UDPContext *s = NULL;
int is_output;
const char *p;
char buf[256];
#if !CONFIG_IPV6
struct sockaddr_in my_addr;
#else
struct sockaddr_storage my_addr;
#endif
int len;
h->is_streamed = 1;
h->max_packet_size = 1472;
is_output = (flags & URL_WRONLY);
if(!ff_network_init())
return AVERROR(EIO);
s = av_mallocz(sizeof(UDPContext));
if (!s)
return AVERROR(ENOMEM);
h->priv_data = s;
s->ttl = 16;
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
p = strchr(uri, '?');
if (p) {
s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", 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);
}
if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
s->buffer_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 (flags & URL_WRONLY)
goto fail;
} else {
udp_set_remote_url(h, uri);
}
if (s->is_multicast && !(h->flags & URL_WRONLY))
s->local_port = port;
udp_fd = udp_socket_create(s, &my_addr, &len);
if (udp_fd < 0)
goto fail;
if (s->reuse_socket)
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail;
/* the bind is needed to give a port to the socket now */
/* if multicast, try the multicast address bind first */
if (s->is_multicast && !(h->flags & URL_WRONLY)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
goto fail;
len = sizeof(my_addr);
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
if (h->flags & URL_WRONLY) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
} else {
/* input */
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
}
if (is_output) {
/* limit the tx buf size to limit latency */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
goto fail;
}
} else {
/* set udp recv buffer size to the largest possible udp packet size to
* avoid losing data on OSes that set this too low by default. */
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
}
/* make the socket non-blocking */
ff_socket_nonblock(udp_fd, 1);
}
s->udp_fd = udp_fd;
return 0;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
av_free(s);
return AVERROR(EIO);
}
/* 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;
}
int udp_open( hnd_t *p_handle, obe_udp_opts_t *udp_opts )
{
int udp_fd = -1, tmp, bind_ret = -1;
struct sockaddr_storage my_addr;
int len;
obe_udp_ctx *s = calloc( 1, sizeof(*s) );
*p_handle = NULL;
if( !s )
return -1;
strncpy( s->hostname, udp_opts->hostname, sizeof(s->hostname) );
s->port = udp_opts->port;
s->local_port = udp_opts->local_port;
s->reuse_socket = udp_opts->reuse_socket;
s->ttl = udp_opts->ttl;
s->buffer_size = udp_opts->buffer_size;
s->miface = udp_opts->miface;
if( udp_set_remote_url( s ) < 0 )
goto fail;
udp_fd = udp_socket_create( s, &my_addr, &len );
if( udp_fd < 0 )
goto fail;
if( s->reuse_socket || s->is_multicast )
{
s->reuse_socket = 1;
if( setsockopt( udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket) ) != 0)
goto fail;
}
/* bind to the local address if not multicast or if the multicast
* bind failed */
if( bind_ret < 0 && bind( udp_fd, (struct sockaddr *)&my_addr, len ) < 0 )
goto fail;
len = sizeof(my_addr);
getsockname( udp_fd, (struct sockaddr *)&my_addr, (socklen_t *) &len );
s->local_port = udp_port( &my_addr, len );
/* set output multicast ttl */
if( s->is_multicast && udp_set_multicast_opts( udp_fd, s ) < 0 )
goto fail;
/* limit the tx buf size to limit latency */
tmp = s->buffer_size;
if( setsockopt( udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp) ) < 0 )
goto fail;
if( s->is_connected && connect( udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len ) )
goto fail;
s->udp_fd = udp_fd;
*p_handle = s;
return 0;
fail:
if( udp_fd >= 0 )
close( udp_fd );
free( s );
return -1;
}
static int rtp_read(URLContext *h, uint8_t *buf, int size)
{
RTPContext *s = h->priv_data;
struct sockaddr_in from;
socklen_t from_len;
int len, fd_max, n;
fd_set rfds;
#if 0
for(;;) {
from_len = sizeof(from);
len = recvfrom (s->rtp_fd, buf, size, 0,
(struct sockaddr *)&from, &from_len);
if (len < 0) {
if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
ff_neterrno() == FF_NETERROR(EINTR))
continue;
return AVERROR(EIO);
}
break;
}
#else
for(;;) {
/* build fdset to listen to RTP and RTCP packets */
FD_ZERO(&rfds);
fd_max = s->rtp_fd;
FD_SET(s->rtp_fd, &rfds);
if (s->rtcp_fd) {
if (s->rtcp_fd > fd_max)
fd_max = s->rtcp_fd;
FD_SET(s->rtcp_fd, &rfds);
}
n = select(fd_max + 1, &rfds, NULL, NULL, NULL);
if (n > 0) {
/* first try RTCP */
if (FD_ISSET(s->rtcp_fd, &rfds)) {
from_len = sizeof(from);
len = recvfrom (s->rtcp_fd, buf, size, 0,
(struct sockaddr *)&from, &from_len);
if (len < 0) {
if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
ff_neterrno() == FF_NETERROR(EINTR))
continue;
return AVERROR(EIO);
} else {
/* update remote rtcp address */
char buf[1024];
snprintf(buf, sizeof(buf), "udp://%s:%d",
inet_ntoa(from.sin_addr), ntohs(from.sin_port));
udp_set_remote_url(s->rtcp_hd, buf);
}
break;
}
/* then RTP */
if (FD_ISSET(s->rtp_fd, &rfds)) {
from_len = sizeof(from);
len = recvfrom (s->rtp_fd, buf, size, 0,
(struct sockaddr *)&from, &from_len);
if (len < 0) {
if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
ff_neterrno() == FF_NETERROR(EINTR))
continue;
return AVERROR(EIO);
} else if (s->rtcp_hd) {
/* update remote rtcp address (only if empty) */
typedef struct {
int udp_fd;
int ttl;
int buffer_size;
int is_multicast;
int local_port;
int reuse_socket;
#if !CONFIG_IPV6
struct sockaddr_in dest_addr;
#else
struct sockaddr_storage dest_addr;
#endif
int dest_addr_len;
} UDPContext;
URLContext *hd = s->rtcp_hd;
UDPContext *h = hd->priv_data;
if (h->dest_addr.sin_addr.s_addr == 0) {
char buf[1024];
snprintf(buf, sizeof(buf), "udp://%s:%d",
inet_ntoa(from.sin_addr), ntohs(from.sin_port)+1);
udp_set_remote_url(s->rtcp_hd, buf);
}
}
break;
}
}
}
#endif
return len;
}
