| 1 | /*
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| 2 | * Copyright (c) 1999 Kungliga Tekniska Högskolan
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| 3 | * (Royal Institute of Technology, Stockholm, Sweden).
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | *
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | *
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| 17 | * 3. Neither the name of the Institute nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | */
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| 33 |
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| 34 | #include <config.h>
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| 35 |
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| 36 | #include "roken.h"
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| 37 |
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| 38 | #ifndef HAVE_H_ERRNO
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| 39 | static int h_errno = NO_RECOVERY;
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| 40 | #endif
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| 41 |
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| 42 | /*
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| 43 | * lookup `name' (address family `af') in DNS and return a pointer
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| 44 | * to a malloced struct hostent or NULL.
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| 45 | */
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| 46 |
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| 47 | ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL
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| 48 | getipnodebyname (const char *name, int af, int flags, int *error_num)
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| 49 | {
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| 50 | struct hostent *tmp;
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| 51 |
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| 52 | #ifdef HAVE_GETHOSTBYNAME2
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| 53 | tmp = gethostbyname2 (name, af);
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| 54 | #else
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| 55 | if (af != AF_INET) {
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| 56 | *error_num = NO_ADDRESS;
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| 57 | return NULL;
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| 58 | }
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| 59 | tmp = gethostbyname (name);
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| 60 | #endif
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| 61 | if (tmp == NULL) {
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| 62 | switch (h_errno) {
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| 63 | case HOST_NOT_FOUND :
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| 64 | case TRY_AGAIN :
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| 65 | case NO_RECOVERY :
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| 66 | *error_num = h_errno;
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| 67 | break;
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| 68 | case NO_DATA :
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| 69 | *error_num = NO_ADDRESS;
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| 70 | break;
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| 71 | default :
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| 72 | *error_num = NO_RECOVERY;
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| 73 | break;
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| 74 | }
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| 75 | return NULL;
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| 76 | }
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| 77 | tmp = copyhostent (tmp);
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| 78 | if (tmp == NULL) {
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| 79 | *error_num = TRY_AGAIN;
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| 80 | return NULL;
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| 81 | }
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| 82 | return tmp;
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| 83 | }
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