1 /* $NetBSD: util.c,v 1.1.1.2 2012/09/09 16:07:55 christos Exp $ */
2
3 /*
4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (c) 1996,1999 by Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #if defined(LIBC_SCCS) && !defined(lint)
21 static const char rcsid[] = "Id: util.c,v 1.3 2005/04/27 04:56:34 sra Exp ";
22 #endif
23
24 #include "port_before.h"
25
26 #include <sys/types.h>
27 #include <sys/socket.h>
28 #include <netinet/in.h>
29 #include <arpa/nameser.h>
30 #include <resolv.h>
31
32 #include <ctype.h>
33 #include <errno.h>
34 #include <stdio.h>
35 #include <string.h>
36 #include <stdlib.h>
37
38 #include <irs.h>
39
40 #include "port_after.h"
41
42 #include "irs_p.h"
43
44 #ifdef SPRINTF_CHAR
45 # define SPRINTF(x) strlen(sprintf/**/x)
46 #else
47 # define SPRINTF(x) sprintf x
48 #endif
49
50 void
map_v4v6_address(const char * src,char * dst)51 map_v4v6_address(const char *src, char *dst) {
52 u_char *p = (u_char *)dst;
53 char tmp[NS_INADDRSZ];
54 int i;
55
56 /* Stash a temporary copy so our caller can update in place. */
57 memcpy(tmp, src, NS_INADDRSZ);
58 /* Mark this ipv6 addr as a mapped ipv4. */
59 for (i = 0; i < 10; i++)
60 *p++ = 0x00;
61 *p++ = 0xff;
62 *p++ = 0xff;
63 /* Retrieve the saved copy and we're done. */
64 memcpy((void*)p, tmp, NS_INADDRSZ);
65 }
66
67 int
make_group_list(struct irs_gr * this,const char * name,gid_t basegid,gid_t * groups,int * ngroups)68 make_group_list(struct irs_gr *this, const char *name,
69 gid_t basegid, gid_t *groups, int *ngroups)
70 {
71 struct group *grp;
72 int i, ng;
73 int ret, maxgroups;
74
75 ret = -1;
76 ng = 0;
77 maxgroups = *ngroups;
78 /*
79 * When installing primary group, duplicate it;
80 * the first element of groups is the effective gid
81 * and will be overwritten when a setgid file is executed.
82 */
83 if (ng >= maxgroups)
84 goto done;
85 groups[ng++] = basegid;
86 if (ng >= maxgroups)
87 goto done;
88 groups[ng++] = basegid;
89 /*
90 * Scan the group file to find additional groups.
91 */
92 (*this->rewind)(this);
93 while ((grp = (*this->next)(this)) != NULL) {
94 if ((gid_t)grp->gr_gid == basegid)
95 continue;
96 for (i = 0; grp->gr_mem[i]; i++) {
97 if (!strcmp(grp->gr_mem[i], name)) {
98 if (ng >= maxgroups)
99 goto done;
100 groups[ng++] = grp->gr_gid;
101 break;
102 }
103 }
104 }
105 ret = 0;
106 done:
107 *ngroups = ng;
108 return (ret);
109 }
110
111 /*! \file */
112