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Diffstat (limited to 'ffmpeg/libavformat/udp.c')
-rw-r--r--ffmpeg/libavformat/udp.c139
1 files changed, 84 insertions, 55 deletions
diff --git a/ffmpeg/libavformat/udp.c b/ffmpeg/libavformat/udp.c
index e8a01db..047ff7c 100644
--- a/ffmpeg/libavformat/udp.c
+++ b/ffmpeg/libavformat/udp.c
@@ -84,23 +84,24 @@ typedef struct {
char *local_addr;
int packet_size;
int timeout;
+ struct sockaddr_storage local_addr_storage;
} UDPContext;
#define OFFSET(x) offsetof(UDPContext, x)
#define D AV_OPT_FLAG_DECODING_PARAM
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
-{"buffer_size", "Socket buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
-{"localport", "Set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
-{"localaddr", "Choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, D|E },
-{"pkt_size", "Set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E },
-{"reuse", "Explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
-{"ttl", "Set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E },
-{"connect", "Should connect() be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
+{"buffer_size", "set packet buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
+{"localport", "set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
+{"localaddr", "choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, D|E },
+{"pkt_size", "set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E },
+{"reuse", "explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
+{"ttl", "set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E },
+{"connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
/* TODO 'sources', 'block' option */
-{"fifo_size", "Set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D },
-{"overrun_nonfatal", "Survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D },
-{"timeout", "In read mode: if no data arrived in more than this time interval, raise error", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D },
+{"fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D },
+{"overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D },
+{"timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D },
{NULL}
};
@@ -140,14 +141,17 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
return 0;
}
-static int udp_join_multicast_group(int sockfd, struct sockaddr *addr)
+static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
{
#ifdef IP_ADD_MEMBERSHIP
if (addr->sa_family == AF_INET) {
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
- mreq.imr_interface.s_addr= INADDR_ANY;
+ if (local_addr)
+ mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
+ else
+ mreq.imr_interface.s_addr= INADDR_ANY;
if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
return -1;
@@ -169,14 +173,17 @@ static int udp_join_multicast_group(int sockfd, struct sockaddr *addr)
return 0;
}
-static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr)
+static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
{
#ifdef IP_DROP_MEMBERSHIP
if (addr->sa_family == AF_INET) {
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
- mreq.imr_interface.s_addr= INADDR_ANY;
+ if (local_addr)
+ mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
+ else
+ mreq.imr_interface.s_addr= INADDR_ANY;
if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
return -1;
@@ -237,7 +244,7 @@ static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr,
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);
+ 0);
if (!sourceaddr)
return AVERROR(ENOENT);
@@ -267,7 +274,7 @@ static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr,
struct ip_mreq_source mreqs;
struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0,
SOCK_DGRAM, AF_UNSPEC,
- AI_NUMERICHOST);
+ 0);
if (!sourceaddr)
return AVERROR(ENOENT);
if (sourceaddr->ai_addr->sa_family != AF_INET) {
@@ -326,7 +333,7 @@ static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr,
if (res0 == 0)
goto fail;
for (res = res0; res; res=res->ai_next) {
- udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
+ udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
if (udp_fd != -1) break;
log_net_error(NULL, AV_LOG_ERROR, "socket");
}
@@ -494,6 +501,27 @@ end:
}
#endif
+static int parse_source_list(char *buf, char **sources, int *num_sources,
+ int max_sources)
+{
+ 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])
+ return AVERROR(ENOMEM);
+ source_start = next + 1;
+ (*num_sources)++;
+ if (*num_sources >= max_sources || !next)
+ break;
+ }
+ return 0;
+}
+
/* put it in UDP context */
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
@@ -507,8 +535,8 @@ static int udp_open(URLContext *h, const char *uri, int flags)
struct sockaddr_storage my_addr;
socklen_t len;
int reuse_specified = 0;
- int i, include = 0, num_sources = 0;
- char *sources[32];
+ int i, num_include_sources = 0, num_exclude_sources = 0;
+ char *include_sources[32], *exclude_sources[32];
h->is_streamed = 1;
@@ -562,31 +590,26 @@ static int udp_open(URLContext *h, const char *uri, int flags)
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;
- }
+ if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
+ if (parse_source_list(buf, include_sources, &num_include_sources,
+ FF_ARRAY_ELEMS(include_sources)))
+ goto fail;
+ }
+ if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
+ if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
+ FF_ARRAY_ELEMS(exclude_sources)))
+ goto fail;
}
if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
s->timeout = strtol(buf, NULL, 10);
}
/* handling needed to support options picking from both AVOption and URL */
s->circular_buffer_size *= 188;
- h->max_packet_size = s->packet_size;
+ if (flags & AVIO_FLAG_WRITE) {
+ h->max_packet_size = s->packet_size;
+ } else {
+ h->max_packet_size = UDP_MAX_PKT_SIZE;
+ }
h->rw_timeout = s->timeout;
/* fill the dest addr */
@@ -608,6 +631,8 @@ static int udp_open(URLContext *h, const char *uri, int flags)
if (udp_fd < 0)
goto fail;
+ s->local_addr_storage=my_addr; //store for future multicast join
+
/* Follow the requested reuse option, unless it's multicast in which
* case enable reuse unless explicitly disabled.
*/
@@ -644,20 +669,20 @@ static int udp_open(URLContext *h, const char *uri, int flags)
}
if (h->flags & AVIO_FLAG_READ) {
/* input */
- 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)
+ if (num_include_sources && num_exclude_sources) {
+ av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
+ goto fail;
+ }
+ if (num_include_sources) {
+ if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, include_sources, num_include_sources, 1) < 0)
goto fail;
} else {
- av_log(NULL, AV_LOG_ERROR, "invalid udp settings: inclusive multicast but no sources given\n");
- goto fail;
+ if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
+ goto fail;
+ }
+ if (num_exclude_sources) {
+ if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, exclude_sources, num_exclude_sources, 0) < 0)
+ goto fail;
}
}
}
@@ -686,8 +711,10 @@ static int udp_open(URLContext *h, const char *uri, int flags)
}
}
- for (i = 0; i < num_sources; i++)
- av_freep(&sources[i]);
+ for (i = 0; i < num_include_sources; i++)
+ av_freep(&include_sources[i]);
+ for (i = 0; i < num_exclude_sources; i++)
+ av_freep(&exclude_sources[i]);
s->udp_fd = udp_fd;
@@ -727,8 +754,10 @@ static int udp_open(URLContext *h, const char *uri, int flags)
if (udp_fd >= 0)
closesocket(udp_fd);
av_fifo_free(s->fifo);
- for (i = 0; i < num_sources; i++)
- av_freep(&sources[i]);
+ for (i = 0; i < num_include_sources; i++)
+ av_freep(&include_sources[i]);
+ for (i = 0; i < num_exclude_sources; i++)
+ av_freep(&exclude_sources[i]);
return AVERROR(EIO);
}
@@ -818,7 +847,7 @@ static int udp_close(URLContext *h)
int ret;
if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
- udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
+ udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
closesocket(s->udp_fd);
#if HAVE_PTHREAD_CANCEL
if (s->thread_started) {
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 12:48:49 +0000