Subscribing to multiple multicast groups on one socket (Linux, C)

Question

Is it possible to receive data from more than one multicast group on a single socket?

For example:

void AddGroup(int sock,
              const char*          


        

Answer 1

bind to the passive address, i.e. 0.0.0.0 for IPv4 and use ASM or SSM to pull in additional groups, e.g. IP_ADD_MEMBERSHIP as listed.

You can only bind once.