Basic API Usage

A part of a sample application code

      bcopy(&grp, &gsr.gsr_group, grp.sin6_len);
      bcopy(&src, &gsr.gsr_source, src.sin6_len);

      if (setsockopt(socket, IPPROTO_IPV6, MCAST_JOIN_SOURCE_GROUP,
                      (char *)&gsr, sizeof(gsr)) < 0)
            perror("cannot listen group");