contrib/bind-9.2.4rc7/lib/bind/irs/getservent.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(LINT) && !defined(CODECENTER)
  19 static const char rcsid[] = "$Id: getservent.c,v 1.2.2.1 2004/03/09 09:17:31 marka Exp $";
  20 #endif
  21
  22 /* Imports */
  23
  24 #include "port_before.h"
  25
  26 #if !defined(__BIND_NOSTATIC)
  27
  28 #include <sys/types.h>
  29
  30 #include <netinet/in.h>
  31 #include <arpa/nameser.h>
  32
  33 #include <errno.h>
  34 #include <resolv.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37
  38 #include <irs.h>
  39
  40 #include "port_after.h"
  41
  42 #include "irs_data.h"
  43
  44 /* Forward */
  45
  46 static struct net_data *init(void);
  47
  48 /* Public */
  49
  50 struct servent *
  51 getservent(void) {
  52         struct net_data *net_data = init();
  53
  54         return (getservent_p(net_data));
  55 }
  56
  57 struct servent *
  58 getservbyname(const char *name, const char *proto) {
  59         struct net_data *net_data = init();
  60
  61         return (getservbyname_p(name, proto, net_data));
  62 }
  63
  64 struct servent *
  65 getservbyport(int port, const char *proto) {
  66         struct net_data *net_data = init();
  67
  68         return (getservbyport_p(port, proto, net_data));
  69 }
  70
  71 void
  72 setservent(int stayopen) {
  73         struct net_data *net_data = init();
  74
  75         setservent_p(stayopen, net_data);
  76 }
  77
  78 void
  79 endservent() {
  80         struct net_data *net_data = init();
  81
  82         endservent_p(net_data);
  83 }
  84
  85 /* Shared private. */
  86
  87 struct servent *
  88 getservent_p(struct net_data *net_data) {
  89         struct irs_sv *sv;
  90
  91         if (!net_data || !(sv = net_data->sv))
  92                 return (NULL);
  93         net_data->sv_last = (*sv->next)(sv);
  94         return (net_data->sv_last);
  95 }
  96
  97 struct servent *
  98 getservbyname_p(const char *name, const char *proto,
  99                 struct net_data *net_data) {
 100         struct irs_sv *sv;
 101         char **sap;
 102
 103         if (!net_data || !(sv = net_data->sv))
 104                 return (NULL);
 105         if (net_data->sv_stayopen && net_data->sv_last)
 106                 if (!proto || !strcmp(net_data->sv_last->s_proto, proto)) {
 107                         if (!strcmp(net_data->sv_last->s_name, name))
 108                                 return (net_data->sv_last);
 109                         for (sap = net_data->sv_last->s_aliases;
 110                              sap && *sap; sap++)
 111                                 if (!strcmp(name, *sap))
 112                                         return (net_data->sv_last);
 113                 }
 114         net_data->sv_last = (*sv->byname)(sv, name, proto);
 115         if (!net_data->sv_stayopen)
 116                 endservent();
 117         return (net_data->sv_last);
 118 }
 119
 120 struct servent *
 121 getservbyport_p(int port, const char *proto, struct net_data *net_data) {
 122         struct irs_sv *sv;
 123
 124         if (!net_data || !(sv = net_data->sv))
 125                 return (NULL);
 126         if (net_data->sv_stayopen && net_data->sv_last)
 127                 if (port == net_data->sv_last->s_port &&
 128                     ( !proto ||
 129                      !strcmp(net_data->sv_last->s_proto, proto)))
 130                         return (net_data->sv_last);
 131         net_data->sv_last = (*sv->byport)(sv, port, proto);
 132         return (net_data->sv_last);
 133 }
 134
 135 void
 136 setservent_p(int stayopen, struct net_data *net_data) {
 137         struct irs_sv *sv;
 138
 139         if (!net_data || !(sv = net_data->sv))
 140                 return;
 141         (*sv->rewind)(sv);
 142         net_data->sv_stayopen = (stayopen != 0);
 143         if (stayopen == 0)
 144                 net_data_minimize(net_data);
 145 }
 146
 147 void
 148 endservent_p(struct net_data *net_data) {
 149         struct irs_sv *sv;
 150
 151         if ((net_data != NULL) && ((sv = net_data->sv) != NULL))
 152                 (*sv->minimize)(sv);
 153 }
 154
 155 /* Private */
 156
 157 static struct net_data *
 158 init() {
 159         struct net_data *net_data;
 160
 161         if (!(net_data = net_data_init(NULL)))
 162                 goto error;
 163         if (!net_data->sv) {
 164                 net_data->sv = (*net_data->irs->sv_map)(net_data->irs);
 165
 166                 if (!net_data->sv || !net_data->res) {
 167  error:
 168                         errno = EIO;
 169                         return (NULL);
 170                 }
 171                 (*net_data->sv->res_set)(net_data->sv, net_data->res, NULL);
 172         }
 173
 174         return (net_data);
 175 }
 176
 177 #endif /*__BIND_NOSTATIC*/