1 /* $NetBSD: getprotoent.c,v 1.1.1.1 2009/04/12 15:33:38 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: getprotoent.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 protoent * 53 getprotoent() { 54 struct net_data *net_data = init(); 55 56 return (getprotoent_p(net_data)); 57 } 58 59 struct protoent * 60 getprotobyname(const char *name) { 61 struct net_data *net_data = init(); 62 63 return (getprotobyname_p(name, net_data)); 64 } 65 66 struct protoent * 67 getprotobynumber(int proto) { 68 struct net_data *net_data = init(); 69 70 return (getprotobynumber_p(proto, net_data)); 71 } 72 73 void 74 setprotoent(int stayopen) { 75 struct net_data *net_data = init(); 76 77 setprotoent_p(stayopen, net_data); 78 } 79 80 void 81 endprotoent() { 82 struct net_data *net_data = init(); 83 84 endprotoent_p(net_data); 85 } 86 87 /* Shared private. */ 88 89 struct protoent * 90 getprotoent_p(struct net_data *net_data) { 91 struct irs_pr *pr; 92 93 if (!net_data || !(pr = net_data->pr)) 94 return (NULL); 95 net_data->pr_last = (*pr->next)(pr); 96 return (net_data->pr_last); 97 } 98 99 struct protoent * 100 getprotobyname_p(const char *name, struct net_data *net_data) { 101 struct irs_pr *pr; 102 char **pap; 103 104 if (!net_data || !(pr = net_data->pr)) 105 return (NULL); 106 if (net_data->pr_stayopen && net_data->pr_last) { 107 if (!strcmp(net_data->pr_last->p_name, name)) 108 return (net_data->pr_last); 109 for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++) 110 if (!strcmp(name, *pap)) 111 return (net_data->pr_last); 112 } 113 net_data->pr_last = (*pr->byname)(pr, name); 114 if (!net_data->pr_stayopen) 115 endprotoent(); 116 return (net_data->pr_last); 117 } 118 119 struct protoent * 120 getprotobynumber_p(int proto, struct net_data *net_data) { 121 struct irs_pr *pr; 122 123 if (!net_data || !(pr = net_data->pr)) 124 return (NULL); 125 if (net_data->pr_stayopen && net_data->pr_last) 126 if (net_data->pr_last->p_proto == proto) 127 return (net_data->pr_last); 128 net_data->pr_last = (*pr->bynumber)(pr, proto); 129 if (!net_data->pr_stayopen) 130 endprotoent(); 131 return (net_data->pr_last); 132 } 133 134 void 135 setprotoent_p(int stayopen, struct net_data *net_data) { 136 struct irs_pr *pr; 137 138 if (!net_data || !(pr = net_data->pr)) 139 return; 140 (*pr->rewind)(pr); 141 net_data->pr_stayopen = (stayopen != 0); 142 if (stayopen == 0) 143 net_data_minimize(net_data); 144 } 145 146 void 147 endprotoent_p(struct net_data *net_data) { 148 struct irs_pr *pr; 149 150 if ((net_data != NULL) && ((pr = net_data->pr) != NULL)) 151 (*pr->minimize)(pr); 152 } 153 154 /* Private */ 155 156 static struct net_data * 157 init() { 158 struct net_data *net_data; 159 160 if (!(net_data = net_data_init(NULL))) 161 goto error; 162 if (!net_data->pr) { 163 net_data->pr = (*net_data->irs->pr_map)(net_data->irs); 164 165 if (!net_data->pr || !net_data->res) { 166 error: 167 errno = EIO; 168 return (NULL); 169 } 170 (*net_data->pr->res_set)(net_data->pr, net_data->res, NULL); 171 } 172 173 return (net_data); 174 } 175 176 #endif /*__BIND_NOSTATIC*/ 177 178 /*! \file */ 179