ipsec_setportof(3) on Linux
The text db9f8d82d94d, as Debian 3.1 (Sarge) shipped it.
get port field of an ip_address ipsec setportof - set port field of an ip_address ipsec sockaddrof - get pointer to internal sockaddr of an ip_address ipsec sockaddrlenof - get length of internal sockaddr of an ip_address