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b168057a | 1 | /* Copyright (C) 1996-2015 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 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://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 | |
afd4eb37 UD |
30 | /* The lookup function for the first entry of this service. */ |
31 | extern int __nss_ethers_lookup (service_user **nip, const char *name, | |
f7ddf3d3 | 32 | void **fctp) internal_function; |
afd4eb37 | 33 | |
6dbe2837 RM |
34 | |
35 | int | |
36 | ether_hostton (const char *hostname, struct ether_addr *addr) | |
37 | { | |
390500b1 | 38 | static service_user *startp; |
6dbe2837 RM |
39 | static lookup_function start_fct; |
40 | service_user *nip; | |
fb776f3e AJ |
41 | union |
42 | { | |
43 | lookup_function f; | |
44 | void *ptr; | |
45 | } fct; | |
6dbe2837 | 46 | int no_more; |
6dbe2837 RM |
47 | enum nss_status status = NSS_STATUS_UNAVAIL; |
48 | struct etherent etherent; | |
49 | ||
50 | if (startp == NULL) | |
51 | { | |
fb776f3e | 52 | no_more = __nss_ethers_lookup (&nip, "gethostton_r", &fct.ptr); |
6dbe2837 RM |
53 | if (no_more) |
54 | startp = (service_user *) -1; | |
55 | else | |
56 | { | |
57 | startp = nip; | |
fb776f3e | 58 | start_fct = fct.f; |
6dbe2837 RM |
59 | } |
60 | } | |
61 | else | |
62 | { | |
fb776f3e | 63 | fct.f = start_fct; |
6dbe2837 RM |
64 | no_more = (nip = startp) == (service_user *) -1; |
65 | } | |
66 | ||
67 | while (no_more == 0) | |
68 | { | |
69 | char buffer[1024]; | |
70 | ||
fb776f3e | 71 | status = (*fct.f) (hostname, ðerent, buffer, sizeof buffer, &errno); |
6dbe2837 | 72 | |
384ca551 | 73 | no_more = __nss_next2 (&nip, "gethostton_r", NULL, &fct.ptr, status, 0); |
6dbe2837 RM |
74 | } |
75 | ||
76 | if (status == NSS_STATUS_SUCCESS) | |
77 | memcpy (addr, etherent.e_addr.ether_addr_octet, | |
78 | sizeof (struct ether_addr)); | |
79 | ||
80 | return status == NSS_STATUS_SUCCESS ? 0 : -1; | |
81 | } |