* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+/**
+ * @file udp.c
+ * UDP protocol
+ */
+
#include "avformat.h"
#include <unistd.h>
#include "network.h"
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
#endif
+#ifndef IN_MULTICAST
+#define IN_MULTICAST(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000)
+#endif
+#ifndef IN6_IS_ADDR_MULTICAST
+#define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff)
+#endif
typedef struct {
int udp_fd;
#else
struct sockaddr_storage dest_addr;
#endif
- size_t dest_addr_len;
+ int dest_addr_len;
} UDPContext;
#define UDP_TX_BUF_SIZE 32768
return addr_len;
}
+static int is_multicast_address(struct sockaddr_storage *addr)
+{
+ if (addr->ss_family == AF_INET) {
+ return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
+ }
+ if (addr->ss_family == AF_INET6) {
+ return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
+ }
+
+ return 0;
+}
+
static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, int *addr_len)
{
int udp_fd = -1;
return sizeof(struct sockaddr_in);
}
+static int is_multicast_address(struct sockaddr_in *addr)
+{
+ return IN_MULTICAST(ntohl(addr->sin_addr.s_addr));
+}
+
static int udp_socket_create(UDPContext *s, struct sockaddr_in *addr, int *addr_len)
{
int fd;
* 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
if (s->dest_addr_len < 0) {
return AVERROR(EIO);
}
+ s->is_multicast = is_multicast_address(&s->dest_addr);
return 0;
}
s->ttl = 16;
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)) {
s->ttl = strtol(buf, NULL, 10);
/* XXX: fix url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
- if (s->is_multicast || (flags & URL_WRONLY))
+ if (flags & URL_WRONLY)
goto fail;
} else {
udp_set_remote_url(h, uri);