1 /* $NetBSD: getservent.c,v 1.1.1.2 2012/09/09 16:07:50 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (c) 1996,1999 by Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #if !defined(LINT) && !defined(CODECENTER) 21 static const char rcsid[] = "Id: getservent.c,v 1.4 2005/04/27 04:56:26 sra Exp "; 22 #endif 23 24 /* Imports */ 25 26 #include "port_before.h" 27 28 #if !defined(__BIND_NOSTATIC) 29 30 #include <sys/types.h> 31 32 #include <netinet/in.h> 33 #include <arpa/nameser.h> 34 35 #include <errno.h> 36 #include <resolv.h> 37 #include <stdio.h> 38 #include <string.h> 39 40 #include <irs.h> 41 42 #include "port_after.h" 43 44 #include "irs_data.h" 45 46 /* Forward */ 47 48 static struct net_data *init(void); 49 50 /* Public */ 51 52 struct servent * 53 getservent(void) { 54 struct net_data *net_data = init(); 55 56 return (getservent_p(net_data)); 57 } 58 59 struct servent * 60 getservbyname(const char *name, const char *proto) { 61 struct net_data *net_data = init(); 62 63 return (getservbyname_p(name, proto, net_data)); 64 } 65 66 struct servent * 67 getservbyport(int port, const char *proto) { 68 struct net_data *net_data = init(); 69 70 return (getservbyport_p(port, proto, net_data)); 71 } 72 73 void 74 setservent(int stayopen) { 75 struct net_data *net_data = init(); 76 77 setservent_p(stayopen, net_data); 78 } 79 80 void 81 endservent() { 82 struct net_data *net_data = init(); 83 84 endservent_p(net_data); 85 } 86 87 /* Shared private. */ 88 89 struct servent * 90 getservent_p(struct net_data *net_data) { 91 struct irs_sv *sv; 92 93 if (!net_data || !(sv = net_data->sv)) 94 return (NULL); 95 net_data->sv_last = (*sv->next)(sv); 96 return (net_data->sv_last); 97 } 98 99 struct servent * 100 getservbyname_p(const char *name, const char *proto, 101 struct net_data *net_data) { 102 struct irs_sv *sv; 103 char **sap; 104 105 if (!net_data || !(sv = net_data->sv)) 106 return (NULL); 107 if (net_data->sv_stayopen && net_data->sv_last) 108 if (!proto || !strcmp(net_data->sv_last->s_proto, proto)) { 109 if (!strcmp(net_data->sv_last->s_name, name)) 110 return (net_data->sv_last); 111 for (sap = net_data->sv_last->s_aliases; 112 sap && *sap; sap++) 113 if (!strcmp(name, *sap)) 114 return (net_data->sv_last); 115 } 116 net_data->sv_last = (*sv->byname)(sv, name, proto); 117 if (!net_data->sv_stayopen) 118 endservent(); 119 return (net_data->sv_last); 120 } 121 122 struct servent * 123 getservbyport_p(int port, const char *proto, struct net_data *net_data) { 124 struct irs_sv *sv; 125 126 if (!net_data || !(sv = net_data->sv)) 127 return (NULL); 128 if (net_data->sv_stayopen && net_data->sv_last) 129 if (port == net_data->sv_last->s_port && 130 ( !proto || 131 !strcmp(net_data->sv_last->s_proto, proto))) 132 return (net_data->sv_last); 133 net_data->sv_last = (*sv->byport)(sv, port, proto); 134 return (net_data->sv_last); 135 } 136 137 void 138 setservent_p(int stayopen, struct net_data *net_data) { 139 struct irs_sv *sv; 140 141 if (!net_data || !(sv = net_data->sv)) 142 return; 143 (*sv->rewind)(sv); 144 net_data->sv_stayopen = (stayopen != 0); 145 if (stayopen == 0) 146 net_data_minimize(net_data); 147 } 148 149 void 150 endservent_p(struct net_data *net_data) { 151 struct irs_sv *sv; 152 153 if ((net_data != NULL) && ((sv = net_data->sv) != NULL)) 154 (*sv->minimize)(sv); 155 } 156 157 /* Private */ 158 159 static struct net_data * 160 init() { 161 struct net_data *net_data; 162 163 if (!(net_data = net_data_init(NULL))) 164 goto error; 165 if (!net_data->sv) { 166 net_data->sv = (*net_data->irs->sv_map)(net_data->irs); 167 168 if (!net_data->sv || !net_data->res) { 169 error: 170 errno = EIO; 171 return (NULL); 172 } 173 (*net_data->sv->res_set)(net_data->sv, net_data->res, NULL); 174 } 175 176 return (net_data); 177 } 178 179 #endif /*__BIND_NOSTATIC*/ 180 181 /*! \file */ 182