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d614a753 | 1 | /* Copyright (C) 1996-2020 Free Software Foundation, Inc. |
afd4eb37 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
6dbe2837 | 4 | |
afd4eb37 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
6dbe2837 | 9 | |
afd4eb37 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
6dbe2837 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
6dbe2837 | 18 | |
2f638d5e | 19 | #include <errno.h> |
6dbe2837 RM |
20 | #include <netinet/ether.h> |
21 | #include <netinet/if_ether.h> | |
84384f5b | 22 | #include <string.h> |
6dbe2837 RM |
23 | |
24 | #include "../nss/nsswitch.h" | |
25 | ||
6dbe2837 | 26 | /* Type of the lookup function we need here. */ |
2f638d5e UD |
27 | typedef int (*lookup_function) (const char *, struct etherent *, char *, int, |
28 | int *); | |
6dbe2837 | 29 | |
6dbe2837 RM |
30 | int |
31 | ether_hostton (const char *hostname, struct ether_addr *addr) | |
32 | { | |
390500b1 | 33 | static service_user *startp; |
6dbe2837 RM |
34 | static lookup_function start_fct; |
35 | service_user *nip; | |
fb776f3e AJ |
36 | union |
37 | { | |
38 | lookup_function f; | |
39 | void *ptr; | |
40 | } fct; | |
6dbe2837 | 41 | int no_more; |
6dbe2837 RM |
42 | enum nss_status status = NSS_STATUS_UNAVAIL; |
43 | struct etherent etherent; | |
44 | ||
45 | if (startp == NULL) | |
46 | { | |
c88ffc23 | 47 | no_more = __nss_ethers_lookup2 (&nip, "gethostton_r", NULL, &fct.ptr); |
6dbe2837 RM |
48 | if (no_more) |
49 | startp = (service_user *) -1; | |
50 | else | |
51 | { | |
52 | startp = nip; | |
fb776f3e | 53 | start_fct = fct.f; |
6dbe2837 RM |
54 | } |
55 | } | |
56 | else | |
57 | { | |
fb776f3e | 58 | fct.f = start_fct; |
6dbe2837 RM |
59 | no_more = (nip = startp) == (service_user *) -1; |
60 | } | |
61 | ||
62 | while (no_more == 0) | |
63 | { | |
64 | char buffer[1024]; | |
65 | ||
fb776f3e | 66 | status = (*fct.f) (hostname, ðerent, buffer, sizeof buffer, &errno); |
6dbe2837 | 67 | |
384ca551 | 68 | no_more = __nss_next2 (&nip, "gethostton_r", NULL, &fct.ptr, status, 0); |
6dbe2837 RM |
69 | } |
70 | ||
71 | if (status == NSS_STATUS_SUCCESS) | |
72 | memcpy (addr, etherent.e_addr.ether_addr_octet, | |
73 | sizeof (struct ether_addr)); | |
74 | ||
75 | return status == NSS_STATUS_SUCCESS ? 0 : -1; | |
76 | } |