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: getprotoent.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 protoent * 51 getprotoent() { 52 struct net_data *net_data = init(); 53 54 return (getprotoent_p(net_data)); 55 } 56 57 struct protoent * 58 getprotobyname(const char *name) { 59 struct net_data *net_data = init(); 60 61 return (getprotobyname_p(name, net_data)); 62 } 63 64 struct protoent * 65 getprotobynumber(int proto) { 66 struct net_data *net_data = init(); 67 68 return (getprotobynumber_p(proto, net_data)); 69 } 70 71 void 72 setprotoent(int stayopen) { 73 struct net_data *net_data = init(); 74 75 setprotoent_p(stayopen, net_data); 76 } 77 78 void 79 endprotoent() { 80 struct net_data *net_data = init(); 81 82 endprotoent_p(net_data); 83 } 84 85 /* Shared private. */ 86 87 struct protoent * 88 getprotoent_p(struct net_data *net_data) { 89 struct irs_pr *pr; 90 91 if (!net_data || !(pr = net_data->pr)) 92 return (NULL); 93 net_data->pr_last = (*pr->next)(pr); 94 return (net_data->pr_last); 95 } 96 97 struct protoent * 98 getprotobyname_p(const char *name, struct net_data *net_data) { 99 struct irs_pr *pr; 100 char **pap; 101 102 if (!net_data || !(pr = net_data->pr)) 103 return (NULL); 104 if (net_data->pr_stayopen && net_data->pr_last) { 105 if (!strcmp(net_data->pr_last->p_name, name)) 106 return (net_data->pr_last); 107 for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++) 108 if (!strcmp(name, *pap)) 109 return (net_data->pr_last); 110 } 111 net_data->pr_last = (*pr->byname)(pr, name); 112 if (!net_data->pr_stayopen) 113 endprotoent(); 114 return (net_data->pr_last); 115 } 116 117 struct protoent * 118 getprotobynumber_p(int proto, struct net_data *net_data) { 119 struct irs_pr *pr; 120 121 if (!net_data || !(pr = net_data->pr)) 122 return (NULL); 123 if (net_data->pr_stayopen && net_data->pr_last) 124 if (net_data->pr_last->p_proto == proto) 125 return (net_data->pr_last); 126 net_data->pr_last = (*pr->bynumber)(pr, proto); 127 if (!net_data->pr_stayopen) 128 endprotoent(); 129 return (net_data->pr_last); 130 } 131 132 void 133 setprotoent_p(int stayopen, struct net_data *net_data) { 134 struct irs_pr *pr; 135 136 if (!net_data || !(pr = net_data->pr)) 137 return; 138 (*pr->rewind)(pr); 139 net_data->pr_stayopen = (stayopen != 0); 140 if (stayopen == 0) 141 net_data_minimize(net_data); 142 } 143 144 void 145 endprotoent_p(struct net_data *net_data) { 146 struct irs_pr *pr; 147 148 if ((net_data != NULL) && ((pr = net_data->pr) != NULL)) 149 (*pr->minimize)(pr); 150 } 151 152 /* Private */ 153 154 static struct net_data * 155 init() { 156 struct net_data *net_data; 157 158 if (!(net_data = net_data_init(NULL))) 159 goto error; 160 if (!net_data->pr) { 161 net_data->pr = (*net_data->irs->pr_map)(net_data->irs); 162 163 if (!net_data->pr || !net_data->res) { 164 error: 165 errno = EIO; 166 return (NULL); 167 } 168 (*net_data->pr->res_set)(net_data->pr, net_data->res, NULL); 169 } 170 171 return (net_data); 172 } 173 174 #endif /*__BIND_NOSTATIC*/ 175 176 /*! \file */ 177