diff options
| author | Martin Storsjö <martin@martin.st> | 2011-11-09 11:45:01 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2011-11-09 20:19:39 +0200 |
| commit | 65ac51373b7e6a2e2bf4e8131acfda32c0708034 (patch) | |
| tree | e766b2afb9051ea464a8fd220dbc231ec1eeb591 /libavformat/udp.c | |
| parent | c33d4916fba4e81a520b0a579cfb5c3b7c7cf9c7 (diff) | |
udp: Allow specifying the local IP address
This is useful if sending multicast data on a host with
multiple interfaces.
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavformat/udp.c')
| -rw-r--r-- | libavformat/udp.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/libavformat/udp.c b/libavformat/udp.c index bd95a811de..178cef477a 100644 --- a/libavformat/udp.c +++ b/libavformat/udp.c @@ -29,6 +29,7 @@ #include "avformat.h" #include "avio_internal.h" #include "libavutil/parseutils.h" +#include "libavutil/avstring.h" #include <unistd.h> #include "internal.h" #include "network.h" @@ -178,8 +179,8 @@ static int udp_set_url(struct sockaddr_storage *addr, 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, const char *localaddr) { int udp_fd = -1; struct addrinfo *res0 = NULL, *res = NULL; @@ -187,7 +188,8 @@ static int udp_socket_create(UDPContext *s, 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) { @@ -302,7 +304,7 @@ static int udp_get_file_handle(URLContext *h) /* 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; int is_output; @@ -350,6 +352,9 @@ static int udp_open(URLContext *h, const char *uri, int flags) 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)); + } } /* fill the dest addr */ @@ -367,7 +372,7 @@ static int udp_open(URLContext *h, const char *uri, int flags) 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; |