struct hostent *
_door_gethostbyaddr_r(const char *addr, int length, int type,
struct hostent *result, char *buffer, int buflen, int *h_errnop)
{
/*
* allocate space on the stack for the nscd to return
* host and host alias information
*/
union {
nsc_data_t s_d;
char s_b[8192];
} space;
nsc_data_t *sptr;
int ndata;
int adata;
struct hostent *resptr = NULL;
if (addr == NULL) {
if (h_errnop)
*h_errnop = HOST_NOT_FOUND;
return (NULL);
}
ndata = sizeof (space);
adata = length + sizeof (nsc_call_t) + 1;
sptr = &space.s_d;
space.s_d.nsc_call.nsc_callnumber = GETHOSTBYADDR;
space.s_d.nsc_call.nsc_u.addr.a_type = type;
space.s_d.nsc_call.nsc_u.addr.a_length = length;
(void) memcpy(space.s_d.nsc_call.nsc_u.addr.a_data, addr, length);
switch (_nsc_trydoorcall(&sptr, &ndata, &adata)) {
case SUCCESS: /* positive cache hit */
break;
case NOTFOUND: /* negative cache hit */
if (h_errnop)
*h_errnop = space.s_d.nsc_ret.nsc_errno;
return (NULL);
default:
return ((struct hostent *)_switch_gethostbyaddr_r(addr,
length, type, result, buffer, buflen, h_errnop));
}
resptr = process_gethost(result, buffer, buflen, h_errnop, sptr);
/*
* check if doors realloced buffer underneath of us....
* munmap it or suffer a memory leak
*/
if (sptr != &space.s_d) {
munmap((char *)sptr, ndata); /* return memory */
}
return (resptr);
}
struct hostent *
_uncached_getipnodebyaddr(const char *addr, int length, int type,
struct hostent *result, char *buffer, int buflen, int *h_errnop)
{
if (type == AF_INET)
return (_switch_gethostbyaddr_r(addr, length, type,
result, buffer, buflen, h_errnop));
else if (type == AF_INET6)
return (_switch_getipnodebyaddr_r(addr, length, type,
result, buffer, buflen, h_errnop));
return (NULL);
}
