*/
#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
-#define _DARWIN_C_SOURCE /* Needed for using IP_MULTICAST_TTL on OS X */
+
#include "avformat.h"
#include "avio_internal.h"
#include "libavutil/parseutils.h"
-#include <unistd.h>
+#include "libavutil/avstring.h"
#include "internal.h"
#include "network.h"
#include "os_support.h"
-#include <sys/time.h>
+#include "url.h"
#ifndef IPV6_ADD_MEMBERSHIP
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
#define UDP_TX_BUF_SIZE 32768
#define UDP_MAX_PKT_SIZE 65536
+static void log_net_error(void *ctx, int level, const char* prefix)
+{
+ char errbuf[100];
+ av_strerror(ff_neterrno(), errbuf, sizeof(errbuf));
+ av_log(ctx, level, "%s: %s\n", prefix, errbuf);
+}
+
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) {
- av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL): %s\n", strerror(errno));
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
return -1;
}
}
#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));
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
return -1;
}
}
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) {
- av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP): %s\n", strerror(errno));
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
return -1;
}
}
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) {
- av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP): %s\n", strerror(errno));
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
return -1;
}
}
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) {
- av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP): %s\n", strerror(errno));
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
return -1;
}
}
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) {
- av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP): %s\n", strerror(errno));
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
return -1;
}
}
static struct addrinfo* udp_resolve_host(const char *hostname, int port,
int type, int family, int flags)
{
- struct addrinfo hints, *res = 0;
+ struct addrinfo hints = { 0 }, *res = 0;
int error;
char sport[16];
const char *node = 0, *service = "0";
if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
node = hostname;
}
- memset(&hints, 0, sizeof(hints));
hints.ai_socktype = type;
hints.ai_family = family;
hints.ai_flags = flags;
return res;
}
+static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr,
+ int addr_len, char **sources,
+ int nb_sources, int include)
+{
+#if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32)
+ /* These ones are available in the microsoft SDK, but don't seem to work
+ * as on linux, so just prefer the v4-only approach there for now. */
+ int i;
+ for (i = 0; i < nb_sources; i++) {
+ struct group_source_req mreqs;
+ int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
+ struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0,
+ SOCK_DGRAM, AF_UNSPEC,
+ AI_NUMERICHOST);
+ if (!sourceaddr)
+ return AVERROR(ENOENT);
+
+ mreqs.gsr_interface = 0;
+ memcpy(&mreqs.gsr_group, addr, addr_len);
+ memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen);
+ freeaddrinfo(sourceaddr);
+
+ if (setsockopt(sockfd, level,
+ include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
+ (const void *)&mreqs, sizeof(mreqs)) < 0) {
+ if (include)
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
+ else
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
+ return ff_neterrno();
+ }
+ }
+#elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
+ int i;
+ if (addr->sa_family != AF_INET) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Setting multicast sources only supported for IPv4\n");
+ return AVERROR(EINVAL);
+ }
+ for (i = 0; i < nb_sources; i++) {
+ struct ip_mreq_source mreqs;
+ struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0,
+ SOCK_DGRAM, AF_UNSPEC,
+ AI_NUMERICHOST);
+ if (!sourceaddr)
+ return AVERROR(ENOENT);
+ if (sourceaddr->ai_addr->sa_family != AF_INET) {
+ freeaddrinfo(sourceaddr);
+ av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n",
+ sources[i]);
+ return AVERROR(EINVAL);
+ }
+
+ mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
+ mreqs.imr_interface.s_addr = INADDR_ANY;
+ mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr;
+ freeaddrinfo(sourceaddr);
+
+ if (setsockopt(sockfd, IPPROTO_IP,
+ include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
+ (const void *)&mreqs, sizeof(mreqs)) < 0) {
+ if (include)
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
+ else
+ log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
+ return ff_neterrno();
+ }
+ }
+#else
+ return AVERROR(ENOSYS);
+#endif
+ return 0;
+}
static int udp_set_url(struct sockaddr_storage *addr,
const char *hostname, int port)
{
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,
+ socklen_t *addr_len, const char *localaddr)
{
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_resolve_host(0, s->local_port, SOCK_DGRAM, family, AI_PASSIVE);
+ res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port,
+ SOCK_DGRAM, family, 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;
- av_log(NULL, AV_LOG_ERROR, "socket: %s\n", strerror(errno));
+ if (udp_fd != -1) break;
+ log_net_error(NULL, AV_LOG_ERROR, "socket");
}
if (udp_fd < 0)
static int udp_port(struct sockaddr_storage *addr, int addr_len)
{
char sbuf[sizeof(int)*3+1];
+ int error;
- 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));
+ if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
+ av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
return -1;
}
if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
s->dest_addr_len)) {
s->is_connected = 0;
- av_log(NULL, AV_LOG_ERROR, "connect: %s\n", strerror(errno));
+ log_net_error(h, AV_LOG_ERROR, "connect");
return AVERROR(EIO);
}
}
* streams at the same time.
* @param h media file context
*/
-#if !FF_API_UDP_GET_FILE
-static
-#endif
-int udp_get_file_handle(URLContext *h)
+static int udp_get_file_handle(URLContext *h)
{
UDPContext *s = h->priv_data;
return s->udp_fd;
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
{
- char hostname[1024];
+ char hostname[1024], localaddr[1024] = "";
int port, udp_fd = -1, tmp, bind_ret = -1;
- UDPContext *s = NULL;
+ UDPContext *s = h->priv_data;
int is_output;
const char *p;
char buf[256];
struct sockaddr_storage my_addr;
- int len;
+ socklen_t len;
int reuse_specified = 0;
+ int i, include = 0, num_sources = 0;
+ char *sources[32];
h->is_streamed = 1;
h->max_packet_size = 1472;
- is_output = (flags & AVIO_WRONLY);
-
- s = av_mallocz(sizeof(UDPContext));
- if (!s)
- return AVERROR(ENOMEM);
+ is_output = !(flags & AVIO_FLAG_READ);
- 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) {
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
- const char *endptr=NULL;
+ 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)
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
s->is_connected = strtol(buf, NULL, 10);
}
+ if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
+ av_strlcpy(localaddr, buf, sizeof(localaddr));
+ }
+ if (av_find_info_tag(buf, sizeof(buf), "sources", p))
+ include = 1;
+ if (include || av_find_info_tag(buf, sizeof(buf), "block", p)) {
+ char *source_start;
+
+ source_start = buf;
+ while (1) {
+ char *next = strchr(source_start, ',');
+ if (next)
+ *next = '\0';
+ sources[num_sources] = av_strdup(source_start);
+ if (!sources[num_sources])
+ goto fail;
+ source_start = next + 1;
+ num_sources++;
+ if (num_sources >= FF_ARRAY_ELEMS(sources) || !next)
+ break;
+ }
+ }
}
/* fill the dest addr */
/* XXX: fix av_url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
- if (flags & AVIO_WRONLY)
+ if (!(flags & AVIO_FLAG_READ))
goto fail;
} else {
if (ff_udp_set_remote_url(h, uri) < 0)
goto fail;
}
- if (s->is_multicast && !(h->flags & AVIO_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);
+ udp_fd = udp_socket_create(s, &my_addr, &len, localaddr);
if (udp_fd < 0)
goto fail;
/* Follow the requested reuse option, unless it's multicast in which
- * case enable reuse unless explicitely disabled.
+ * case enable reuse unless explicitly disabled.
*/
if (s->reuse_socket || (s->is_multicast && !reuse_specified)) {
s->reuse_socket = 1;
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 & AVIO_WRONLY)) {
+ /* If multicast, try binding the multicast address first, to avoid
+ * receiving UDP packets from other sources aimed at the same UDP
+ * port. This fails on windows. This makes sending to the same address
+ * using sendto() fail, so only do it if we're opened in read-only mode. */
+ if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
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)
+ /* the bind is needed to give a port to the socket now */
+ if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
+ log_net_error(h, AV_LOG_ERROR, "bind failed");
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 & AVIO_WRONLY) {
+ if (h->flags & AVIO_FLAG_WRITE) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
- } else {
+ }
+ if (h->flags & AVIO_FLAG_READ) {
/* input */
- if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
+ if (num_sources == 0 || !include) {
+ if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
+ goto fail;
+
+ if (num_sources) {
+ if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, sources, num_sources, 0) < 0)
+ goto fail;
+ }
+ } else if (include && num_sources) {
+ if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, sources, num_sources, 1) < 0)
+ goto fail;
+ } else {
+ av_log(NULL, AV_LOG_ERROR, "invalid udp settings: inclusive multicast but no sources given\n");
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) {
- av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
+ log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
goto fail;
}
} else {
* 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));
+ log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
}
/* 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(NULL, AV_LOG_ERROR, "connect: %s\n", strerror(errno));
+ log_net_error(h, AV_LOG_ERROR, "connect");
goto fail;
}
}
+ for (i = 0; i < num_sources; i++)
+ av_free(sources[i]);
+
s->udp_fd = udp_fd;
return 0;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
- av_free(s);
+ for (i = 0; i < num_sources; i++)
+ av_free(sources[i]);
return AVERROR(EIO);
}
{
UDPContext *s = h->priv_data;
- if (s->is_multicast && !(h->flags & AVIO_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);
- av_free(s);
return 0;
}
URLProtocol ff_udp_protocol = {
- "udp",
- udp_open,
- udp_read,
- udp_write,
- NULL, /* seek */
- udp_close,
+ .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,
+ .priv_data_size = sizeof(UDPContext),
+ .flags = URL_PROTOCOL_FLAG_NETWORK,
};
projects / ffmpeg / blobdiff