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