sm_gethostbyaddr
hp = sm_gethostbyaddr((char *) &sa->sin.sin_addr,
hp = sm_gethostbyaddr((char *) &sa->sin6.sin6_addr,
hp = sm_gethostbyaddr((char *)&in_addr,
hp = sm_gethostbyaddr((char *)&in6_addr,
hp = sm_gethostbyaddr((char *) &sap->sin.sin_addr,
hp = sm_gethostbyaddr((char *) &sap->sin6.sin6_addr,
hp = sm_gethostbyaddr((char *) &sap->siso.siso_addr,
hp = sm_gethostbyaddr(sap->sa.sa_data, sizeof(sap->sa.sa_data),
extern struct hostent *sm_gethostbyaddr __P((char *, int, int));