--- /dev/null
+struct ip_msfilter {
+ struct in_addr imsf_multiaddr; /* IP multicast group address */
+ struct in_addr imsf_interface; /* IP address of local interface */
+ uint32_t imsf_fmode; /* Filter-mode */
+ uint32_t imsf_numsrc; /* Number of sources in the following array */
+ struct in_addr imsf_slist[1]; /* Array of source addresses */
+};