contrib/bind-9.5.2/lib/bind/irs/util.c

   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
  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
  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 */