netname4
char *netname4(in_addr_t, struct sockaddr_in *);
return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
cp = netname4(sin->sin_addr.s_addr,
char *netname4(in_addr_t, in_addr_t);
return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,