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 1.4 2005/04/27 04:56:26 sra 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*/ 178 179 /*! \file */ 180