/*
* UDP prototype streaming system
- * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+/**
+ * @file
+ * UDP protocol
+ */
+
+#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
+
#include "avformat.h"
+#include "avio_internal.h"
+#include "libavutil/parseutils.h"
#include <unistd.h>
+#include "internal.h"
#include "network.h"
#include "os_support.h"
+#include "url.h"
+#include <sys/time.h>
#ifndef IPV6_ADD_MEMBERSHIP
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
typedef struct {
int udp_fd;
int ttl;
+ int buffer_size;
int is_multicast;
int local_port;
int reuse_socket;
-#ifndef CONFIG_IPV6
- struct sockaddr_in dest_addr;
-#else
struct sockaddr_storage dest_addr;
-#endif
- size_t dest_addr_len;
+ int dest_addr_len;
+ int is_connected;
} UDPContext;
#define UDP_TX_BUF_SIZE 32768
#define UDP_MAX_PKT_SIZE 65536
-static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
+static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
+ struct sockaddr *addr)
+{
#ifdef IP_MULTICAST_TTL
if (addr->sa_family == AF_INET) {
if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
}
}
#endif
-#ifdef CONFIG_IPV6
+#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
if (addr->sa_family == AF_INET6) {
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno));
return 0;
}
-static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) {
+static int udp_join_multicast_group(int sockfd, struct sockaddr *addr)
+{
#ifdef IP_ADD_MEMBERSHIP
if (addr->sa_family == AF_INET) {
struct ip_mreq mreq;
}
}
#endif
-#ifdef CONFIG_IPV6
+#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
if (addr->sa_family == AF_INET6) {
struct ipv6_mreq mreq6;
return 0;
}
-static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) {
+static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr)
+{
#ifdef IP_DROP_MEMBERSHIP
if (addr->sa_family == AF_INET) {
struct ip_mreq mreq;
}
}
#endif
-#ifdef CONFIG_IPV6
+#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
if (addr->sa_family == AF_INET6) {
struct ipv6_mreq mreq6;
return 0;
}
-#ifdef CONFIG_IPV6
-static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
+static struct addrinfo* udp_resolve_host(const char *hostname, int port,
+ int type, int family, int flags)
+{
struct addrinfo hints, *res = 0;
int error;
char sport[16];
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));
+ res = NULL;
+ av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error));
}
return res;
}
-static int udp_set_url(struct sockaddr_storage *addr, const char *hostname, int port) {
+static int udp_set_url(struct sockaddr_storage *addr,
+ const char *hostname, int port)
+{
struct addrinfo *res0;
int addr_len;
- res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
+ res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
if (res0 == 0) return AVERROR(EIO);
memcpy(addr, res0->ai_addr, res0->ai_addrlen);
addr_len = res0->ai_addrlen;
return addr_len;
}
-static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, int *addr_len)
+static int udp_socket_create(UDPContext *s,
+ struct sockaddr_storage *addr, int *addr_len)
{
int udp_fd = -1;
struct addrinfo *res0 = NULL, *res = NULL;
if (((struct sockaddr *) &s->dest_addr)->sa_family)
family = ((struct sockaddr *) &s->dest_addr)->sa_family;
- res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, family, AI_PASSIVE);
+ res0 = udp_resolve_host(0, s->local_port, SOCK_DGRAM, family, AI_PASSIVE);
if (res0 == 0)
goto fail;
for (res = res0; res; res=res->ai_next) {
static int udp_port(struct sockaddr_storage *addr, int addr_len)
{
- char sbuf[NI_MAXSERV];
- char hbuf[NI_MAXHOST];
+ char sbuf[sizeof(int)*3+1];
- if (getnameinfo((struct sockaddr *)addr, addr_len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
+ if (getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV) != 0) {
av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", strerror(errno));
return -1;
}
return strtol(sbuf, NULL, 10);
}
-#else
-
-static int udp_set_url(struct sockaddr_in *addr, const char *hostname, int port)
-{
- /* set the destination address */
- if (resolve_host(&addr->sin_addr, hostname) < 0)
- return AVERROR(EIO);
- addr->sin_family = AF_INET;
- addr->sin_port = htons(port);
-
- return sizeof(struct sockaddr_in);
-}
-
-static int udp_socket_create(UDPContext *s, struct sockaddr_in *addr, int *addr_len)
-{
- int fd;
-
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (fd < 0)
- return -1;
-
- addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = htonl (INADDR_ANY);
- addr->sin_port = htons(s->local_port);
- *addr_len = sizeof(struct sockaddr_in);
-
- return fd;
-}
-
-static int udp_port(struct sockaddr_in *addr, int len)
-{
- return ntohs(addr->sin_port);
-}
-#endif /* CONFIG_IPV6 */
-
/**
* If no filename is given to av_open_input_file because you want to
* 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)
+ * option: 'ttl=n' : set the ttl value (for multicast only)
* 'localport=n' : set the local port
* 'pkt_size=n' : set max packet size
* 'reuse=1' : enable reusing the socket
*
- * @param s1 media file context
+ * @param h media file context
* @param uri of the remote server
* @return zero if no error.
*/
-int udp_set_remote_url(URLContext *h, const char *uri)
+int ff_udp_set_remote_url(URLContext *h, const char *uri)
{
UDPContext *s = h->priv_data;
- char hostname[256];
+ char hostname[256], buf[10];
int port;
+ const char *p;
- url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
+ av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
/* set the destination address */
s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
if (s->dest_addr_len < 0) {
return AVERROR(EIO);
}
+ s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
+ p = strchr(uri, '?');
+ if (p) {
+ if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
+ int was_connected = s->is_connected;
+ s->is_connected = strtol(buf, NULL, 10);
+ if (s->is_connected && !was_connected) {
+ if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
+ s->dest_addr_len)) {
+ s->is_connected = 0;
+ av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno));
+ return AVERROR(EIO);
+ }
+ }
+ }
+ }
return 0;
}
/**
- * Return the local port used by the UDP connexion
- * @param s1 media file context
+ * Return the local port used by the UDP connection
+ * @param h media file context
* @return the local port number
*/
-int udp_get_local_port(URLContext *h)
+int ff_udp_get_local_port(URLContext *h)
{
UDPContext *s = h->priv_data;
return s->local_port;
* streams at the same time.
* @param h media file context
*/
-int udp_get_file_handle(URLContext *h)
+static int udp_get_file_handle(URLContext *h)
{
UDPContext *s = h->priv_data;
return s->udp_fd;
static int udp_open(URLContext *h, const char *uri, int flags)
{
char hostname[1024];
- int port, udp_fd = -1, tmp;
+ int port, udp_fd = -1, tmp, bind_ret = -1;
UDPContext *s = NULL;
int is_output;
const char *p;
char buf[256];
-#ifndef CONFIG_IPV6
- struct sockaddr_in my_addr;
-#else
struct sockaddr_storage my_addr;
-#endif
int len;
+ int reuse_specified = 0;
h->is_streamed = 1;
h->max_packet_size = 1472;
- is_output = (flags & URL_WRONLY);
+ is_output = !(flags & AVIO_FLAG_READ);
s = av_mallocz(sizeof(UDPContext));
if (!s)
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->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
- s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
- if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
+ if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
+ char *endptr = NULL;
+ s->reuse_socket = strtol(buf, &endptr, 10);
+ /* assume if no digits were found it is a request to enable it */
+ if (buf == endptr)
+ s->reuse_socket = 1;
+ reuse_specified = 1;
+ }
+ if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
}
- if (find_info_tag(buf, sizeof(buf), "localport", p)) {
+ if (av_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)) {
+ if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
h->max_packet_size = strtol(buf, NULL, 10);
}
+ if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
+ s->buffer_size = strtol(buf, NULL, 10);
+ }
+ if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
+ s->is_connected = strtol(buf, NULL, 10);
+ }
}
/* fill the dest addr */
- url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
+ av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
- /* XXX: fix url_split */
+ /* XXX: fix av_url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
- if (s->is_multicast || (flags & URL_WRONLY))
+ if (!(flags & AVIO_FLAG_READ))
goto fail;
} else {
- udp_set_remote_url(h, uri);
+ if (ff_udp_set_remote_url(h, uri) < 0)
+ goto fail;
}
- if(!ff_network_init())
- return AVERROR(EIO);
-
- if (s->is_multicast && !(h->flags & URL_WRONLY))
+ if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ))
s->local_port = port;
udp_fd = udp_socket_create(s, &my_addr, &len);
if (udp_fd < 0)
goto fail;
- if (s->reuse_socket)
+ /* Follow the requested reuse option, unless it's multicast in which
+ * case enable reuse unless explicitely disabled.
+ */
+ if (s->reuse_socket || (s->is_multicast && !reuse_specified)) {
+ s->reuse_socket = 1;
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 (bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
+ /* if multicast, try the multicast address bind first */
+ if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
+ 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);
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
- if (h->flags & URL_WRONLY) {
+ if (!(h->flags & AVIO_FLAG_READ)) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
if (is_output) {
/* limit the tx buf size to limit latency */
- tmp = UDP_TX_BUF_SIZE;
+ 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));
+ av_log(h, 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 = UDP_MAX_PKT_SIZE;
- setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp));
+ tmp = s->buffer_size;
+ if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
+ av_log(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
+ }
+ /* make the socket non-blocking */
+ ff_socket_nonblock(udp_fd, 1);
+ }
+ if (s->is_connected) {
+ if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
+ av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno));
+ goto fail;
+ }
}
s->udp_fd = udp_fd;
static int udp_read(URLContext *h, uint8_t *buf, int size)
{
UDPContext *s = h->priv_data;
- int len;
+ int ret;
- for(;;) {
- len = recv(s->udp_fd, buf, size, 0);
- if (len < 0) {
- if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
- ff_neterrno() != FF_NETERROR(EINTR))
- return AVERROR(EIO);
- } else {
- break;
- }
+ if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+ ret = ff_network_wait_fd(s->udp_fd, 0);
+ if (ret < 0)
+ return ret;
}
- return len;
+ ret = recv(s->udp_fd, buf, size, 0);
+ return ret < 0 ? ff_neterrno() : ret;
}
-static int udp_write(URLContext *h, uint8_t *buf, int size)
+static int udp_write(URLContext *h, const uint8_t *buf, int size)
{
UDPContext *s = h->priv_data;
int ret;
- for(;;) {
+ if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+ ret = ff_network_wait_fd(s->udp_fd, 1);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (!s->is_connected) {
ret = sendto (s->udp_fd, buf, size, 0,
(struct sockaddr *) &s->dest_addr,
s->dest_addr_len);
- if (ret < 0) {
- if (ff_neterrno() != FF_NETERROR(EINTR) &&
- ff_neterrno() != FF_NETERROR(EAGAIN))
- return AVERROR(EIO);
- } else {
- break;
- }
- }
- return size;
+ } else
+ ret = send(s->udp_fd, buf, size, 0);
+
+ return ret < 0 ? ff_neterrno() : ret;
}
static int udp_close(URLContext *h)
{
UDPContext *s = h->priv_data;
- if (s->is_multicast && !(h->flags & URL_WRONLY))
+ if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
closesocket(s->udp_fd);
- ff_network_close();
av_free(s);
return 0;
}
-URLProtocol udp_protocol = {
- "udp",
- udp_open,
- udp_read,
- udp_write,
- NULL, /* seek */
- udp_close,
+URLProtocol ff_udp_protocol = {
+ .name = "udp",
+ .url_open = udp_open,
+ .url_read = udp_read,
+ .url_write = udp_write,
+ .url_close = udp_close,
+ .url_get_file_handle = udp_get_file_handle,
};
projects / ffmpeg / blobdiff