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