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)
19 static 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
48 void
map_v4v6_address(const char * src,char * dst)49 map_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
65 int
make_group_list(struct irs_gr * this,const char * name,gid_t basegid,gid_t * groups,int * ngroups)66 make_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