Multicast Source Filter (MSF) APIs

Socket Interface Extensions for Multicast Source Filters
draft-ietf-magma-msf-api-03.txt

Used to change a socket state
Basic API
Used with setsockopt()
Used to join/leave a single channel
Advanced API
Used with ioctl()
Used to join/leave a single or multiple channel(s)
       e.g., ((S1,S2,S3),G1)
Used to change a filter-mode of socket state without leaving joined channel