Checksum

• Checksum incorporates the IPv6 pseudo-header

  • int offset = 2;
  • setsockopt(fd, IPPROTO_IPV6, IPV6_CHECKSUM,
  • &offset, sizeof(offset));

• offset is where the checksum is located

  • -1 to disable checksumming

• Notes

  • Only for raw sockets other thant ICMPv6 sockets
  • Odd is invalid

Notes: