| 1 | /*
|
|---|
| 2 | * Copyright (c) 1999 Kungliga Tekniska Högskolan
|
|---|
| 3 | * (Royal Institute of Technology, Stockholm, Sweden).
|
|---|
| 4 | * All rights reserved.
|
|---|
| 5 | *
|
|---|
| 6 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 7 | * modification, are permitted provided that the following conditions
|
|---|
| 8 | * are met:
|
|---|
| 9 | *
|
|---|
| 10 | * 1. Redistributions of source code must retain the above copyright
|
|---|
| 11 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 12 | *
|
|---|
| 13 | * 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 14 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 15 | * documentation and/or other materials provided with the distribution.
|
|---|
| 16 | *
|
|---|
| 17 | * 3. Neither the name of the Institute nor the names of its contributors
|
|---|
| 18 | * may be used to endorse or promote products derived from this software
|
|---|
| 19 | * without specific prior written permission.
|
|---|
| 20 | *
|
|---|
| 21 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|---|
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 31 | * SUCH DAMAGE.
|
|---|
| 32 | */
|
|---|
| 33 |
|
|---|
| 34 | #include <config.h>
|
|---|
| 35 |
|
|---|
| 36 | #include "roken.h"
|
|---|
| 37 |
|
|---|
| 38 | /*
|
|---|
| 39 | * lookup `src, len' (address family `af') in DNS and return a pointer
|
|---|
| 40 | * to a malloced struct hostent or NULL.
|
|---|
| 41 | */
|
|---|
| 42 |
|
|---|
| 43 | ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
|
|---|
| 44 | getipnodebyaddr (const void *src, size_t len, int af, int *error_num)
|
|---|
| 45 | {
|
|---|
| 46 | struct hostent *tmp;
|
|---|
| 47 |
|
|---|
| 48 | tmp = gethostbyaddr (src, len, af);
|
|---|
| 49 | if (tmp == NULL) {
|
|---|
| 50 | switch (h_errno) {
|
|---|
| 51 | case HOST_NOT_FOUND :
|
|---|
| 52 | case TRY_AGAIN :
|
|---|
| 53 | case NO_RECOVERY :
|
|---|
| 54 | *error_num = h_errno;
|
|---|
| 55 | break;
|
|---|
| 56 | case NO_DATA :
|
|---|
| 57 | *error_num = NO_ADDRESS;
|
|---|
| 58 | break;
|
|---|
| 59 | default :
|
|---|
| 60 | *error_num = NO_RECOVERY;
|
|---|
| 61 | break;
|
|---|
| 62 | }
|
|---|
| 63 | return NULL;
|
|---|
| 64 | }
|
|---|
| 65 | tmp = copyhostent (tmp);
|
|---|
| 66 | if (tmp == NULL) {
|
|---|
| 67 | *error_num = TRY_AGAIN;
|
|---|
| 68 | return NULL;
|
|---|
| 69 | }
|
|---|
| 70 | return tmp;
|
|---|
| 71 | }
|
|---|
