IPv6 Core (cont'ed): Advanced Socket API Example

• To receive hop-by-hop options:

• if (

• #ifdef IPV6_RECVHOPOPTS /* Check if we have new API */

• setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS,

• &on, sizeof(on)) < 0

• #ifdef IPV6_2292HOPOPTS /* Try Old API for old kernel */

• && setsockopt(s, IPPROTO_IPV6, IPV6_2292HOPOPTS,

• &on, sizeof(on)) < 0

• #endif

• #else /* If new API unavailable, try old one */

• setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS,

• &on, sizeof(on)) < 0)

• #endif

• )

• perror(“setsockopt(HOPOPTS)”);

• Otherwise, you will suck...