Receiving Optional Information via Ancillary Data (1)

• Socket options to receive optional information

  • IPV6_RECVPKTINFO
    • interface, local address
  • IPV6_RECVHOPLIMIT
  • IPV6_RECVRTHDR
  • IPV6_RECVHOPOPTS
  • IPV6_RECVDSTOPTS
  • IPV6_RECVTCLASS

• Usage

  • setsockopt(sock, IPPROTO_IPV6, IPV6_xxx, on, sizeof(on));

Notes: