contrib/bind-9.2.4rc7/lib/bind/irs/getprotoent_r.c

   1 /*
   2  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (c) 1998-1999 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: getprotoent_r.c,v 1.3.2.1 2004/03/09 09:17:30 marka Exp $";
  20 #endif /* LIBC_SCCS and not lint */
  21
  22 #include <port_before.h>
  23 #if !defined(_REENTRANT) || !defined(DO_PTHREADS)
  24         static int getprotoent_r_not_required = 0;
  25 #else
  26 #include <errno.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <sys/types.h>
  30 #include <netinet/in.h>
  31 #include <netdb.h>
  32 #include <port_after.h>
  33
  34 #ifdef PROTO_R_RETURN
  35
  36 static PROTO_R_RETURN
  37 copy_protoent(struct protoent *, struct protoent *, PROTO_R_COPY_ARGS);
  38
  39 PROTO_R_RETURN
  40 getprotobyname_r(const char *name, struct protoent *pptr, PROTO_R_ARGS) {
  41         struct protoent *pe = getprotobyname(name);
  42 #ifdef PROTO_R_SETANSWER
  43         int n = 0;
  44
  45         if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
  46                 *answerp = NULL;
  47         else
  48                 *answerp = pptr;
  49
  50         return (n);
  51 #else
  52         if (pe == NULL)
  53                 return (PROTO_R_BAD);
  54
  55         return (copy_protoent(pe, pptr, PROTO_R_COPY));
  56 #endif
  57 }
  58
  59 PROTO_R_RETURN
  60 getprotobynumber_r(int proto, struct protoent *pptr, PROTO_R_ARGS) {
  61         struct protoent *pe = getprotobynumber(proto);
  62 #ifdef PROTO_R_SETANSWER
  63         int n = 0;
  64
  65         if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
  66                 *answerp = NULL;
  67         else
  68                 *answerp = pptr;
  69
  70         return (n);
  71 #else
  72         if (pe == NULL)
  73                 return (PROTO_R_BAD);
  74
  75         return (copy_protoent(pe, pptr, PROTO_R_COPY));
  76 #endif
  77 }
  78
  79 /*
  80  *      These assume a single context is in operation per thread.
  81  *      If this is not the case we will need to call irs directly
  82  *      rather than through the base functions.
  83  */
  84
  85 PROTO_R_RETURN
  86 getprotoent_r(struct protoent *pptr, PROTO_R_ARGS) {
  87         struct protoent *pe = getprotoent();
  88 #ifdef PROTO_R_SETANSWER
  89         int n = 0;
  90
  91         if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
  92                 *answerp = NULL;
  93         else
  94                 *answerp = pptr;
  95
  96         return (n);
  97 #else
  98         if (pe == NULL)
  99                 return (PROTO_R_BAD);
 100
 101         return (copy_protoent(pe, pptr, PROTO_R_COPY));
 102 #endif
 103 }
 104
 105 PROTO_R_SET_RETURN
 106 #ifdef PROTO_R_ENT_ARGS
 107 setprotoent_r(int stay_open, PROTO_R_ENT_ARGS)
 108 #else
 109 setprotoent_r(int stay_open)
 110 #endif
 111 {
 112         setprotoent(stay_open);
 113 #ifdef PROTO_R_SET_RESULT
 114         return (PROTO_R_SET_RESULT);
 115 #endif
 116 }
 117
 118 PROTO_R_END_RETURN
 119 #ifdef PROTO_R_ENT_ARGS
 120 endprotoent_r(PROTO_R_ENT_ARGS)
 121 #else
 122 endprotoent_r()
 123 #endif
 124 {
 125         endprotoent();
 126         PROTO_R_END_RESULT(PROTO_R_OK);
 127 }
 128
 129 /* Private */
 130
 131 #ifndef PROTOENT_DATA
 132 static PROTO_R_RETURN
 133 copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
 134         char *cp;
 135         int i, n;
 136         int numptr, len;
 137
 138         /* Find out the amount of space required to store the answer. */
 139         numptr = 1; /* NULL ptr */
 140         len = (char *)ALIGN(buf) - buf;
 141         for (i = 0; pe->p_aliases[i]; i++, numptr++) {
 142                 len += strlen(pe->p_aliases[i]) + 1;
 143         }
 144         len += strlen(pe->p_name) + 1;
 145         len += numptr * sizeof(char*);
 146
 147         if (len > (int)buflen) {
 148                 errno = ERANGE;
 149                 return (PROTO_R_BAD);
 150         }
 151
 152         /* copy protocol value*/
 153         pptr->p_proto = pe->p_proto;
 154
 155         cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
 156
 157         /* copy official name */
 158         n = strlen(pe->p_name) + 1;
 159         strcpy(cp, pe->p_name);
 160         pptr->p_name = cp;
 161         cp += n;
 162
 163         /* copy aliases */
 164         pptr->p_aliases = (char **)ALIGN(buf);
 165         for (i = 0 ; pe->p_aliases[i]; i++) {
 166                 n = strlen(pe->p_aliases[i]) + 1;
 167                 strcpy(cp, pe->p_aliases[i]);
 168                 pptr->p_aliases[i] = cp;
 169                 cp += n;
 170         }
 171         pptr->p_aliases[i] = NULL;
 172
 173         return (PROTO_R_OK);
 174 }
 175 #else /* !PROTOENT_DATA */
 176 static int
 177 copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
 178         char *cp, *eob;
 179         int i, n;
 180
 181         /* copy protocol value */
 182         pptr->p_proto = pe->p_proto;
 183
 184         /* copy official name */
 185         cp = pdptr->line;
 186         eob = pdptr->line + sizeof(pdptr->line);
 187         if ((n = strlen(pe->p_name) + 1) < (eob - cp)) {
 188                 strcpy(cp, pe->p_name);
 189                 pptr->p_name = cp;
 190                 cp += n;
 191         } else {
 192                 return (-1);
 193         }
 194
 195         /* copy aliases */
 196         i = 0;
 197         pptr->p_aliases = pdptr->proto_aliases;
 198         while (pe->p_aliases[i] && i < (_MAXALIASES-1)) {
 199                 if ((n = strlen(pe->p_aliases[i]) + 1) < (eob - cp)) {
 200                         strcpy(cp, pe->p_aliases[i]);
 201                         pptr->p_aliases[i] = cp;
 202                         cp += n;
 203                 } else {
 204                         break;
 205                 }
 206                 i++;
 207         }
 208         pptr->p_aliases[i] = NULL;
 209
 210         return (PROTO_R_OK);
 211 }
 212 #endif /* PROTOENT_DATA */
 213 #else /* PROTO_R_RETURN */
 214         static int getprotoent_r_unknown_system = 0;
 215 #endif /* PROTO_R_RETURN */
 216 #endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */