1 /* 2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3 * Portions Copyright (c) 1996,1998 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 #include <syslog.h> 23 #include <sys/types.h> 24 #include <sys/socket.h> 25 26 #include <netinet/in.h> 27 #include <arpa/inet.h> 28 #include <arpa/nameser.h> 29 30 #include <errno.h> 31 #include <fcntl.h> 32 #include <resolv.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <syslog.h> 37 38 #include <irs.h> 39 #include <irp.h> 40 #include <isc/irpmarshall.h> 41 42 #include <isc/memcluster.h> 43 #include <isc/misc.h> 44 45 #include "irs_p.h" 46 #include "lcl_p.h" 47 #include "irp_p.h" 48 49 #include "port_after.h" 50 51 #define MAXALIASES 35 52 #define MAXADDRSIZE 4 53 54 struct pvt { 55 struct irp_p *girpdata; 56 int warned; 57 struct nwent net; 58 }; 59 60 /* Forward */ 61 62 static void nw_close(struct irs_nw *); 63 static struct nwent * nw_byname(struct irs_nw *, const char *, int); 64 static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int); 65 static struct nwent * nw_next(struct irs_nw *); 66 static void nw_rewind(struct irs_nw *); 67 static void nw_minimize(struct irs_nw *); 68 69 static void free_nw(struct nwent *nw); 70 71 72 /* Public */ 73 74 /*% 75 * struct irs_nw * irs_irp_nw(struct irs_acc *this) 76 * 77 */ 78 79 struct irs_nw * 80 irs_irp_nw(struct irs_acc *this) { 81 struct irs_nw *nw; 82 struct pvt *pvt; 83 84 if (!(pvt = memget(sizeof *pvt))) { 85 errno = ENOMEM; 86 return (NULL); 87 } 88 memset(pvt, 0, sizeof *pvt); 89 90 if (!(nw = memget(sizeof *nw))) { 91 memput(pvt, sizeof *pvt); 92 errno = ENOMEM; 93 return (NULL); 94 } 95 memset(nw, 0x0, sizeof *nw); 96 pvt->girpdata = this->private; 97 98 nw->private = pvt; 99 nw->close = nw_close; 100 nw->byname = nw_byname; 101 nw->byaddr = nw_byaddr; 102 nw->next = nw_next; 103 nw->rewind = nw_rewind; 104 nw->minimize = nw_minimize; 105 return (nw); 106 } 107 108 /* Methods */ 109 110 /*% 111 * void nw_close(struct irs_nw *this) 112 * 113 */ 114 115 static void 116 nw_close(struct irs_nw *this) { 117 struct pvt *pvt = (struct pvt *)this->private; 118 119 nw_minimize(this); 120 121 free_nw(&pvt->net); 122 123 memput(pvt, sizeof *pvt); 124 memput(this, sizeof *this); 125 } 126 127 /*% 128 * struct nwent * nw_byaddr(struct irs_nw *this, void *net, 129 * int length, int type) 130 * 131 */ 132 133 static struct nwent * 134 nw_byaddr(struct irs_nw *this, void *net, int length, int type) { 135 struct pvt *pvt = (struct pvt *)this->private; 136 struct nwent *nw = &pvt->net; 137 char *body = NULL; 138 size_t bodylen; 139 int code; 140 char paddr[24]; /*%< bigenough for ip4 w/ cidr spec. */ 141 char text[256]; 142 143 if (inet_net_ntop(type, net, length, paddr, sizeof paddr) == NULL) { 144 return (NULL); 145 } 146 147 if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { 148 return (NULL); 149 } 150 151 if (irs_irp_send_command(pvt->girpdata, "getnetbyaddr %s %s", 152 paddr, ADDR_T_STR(type)) != 0) 153 return (NULL); 154 155 if (irs_irp_get_full_response(pvt->girpdata, &code, 156 text, sizeof text, 157 &body, &bodylen) != 0) { 158 return (NULL); 159 } 160 161 if (code == IRPD_GETNET_OK) { 162 free_nw(nw); 163 if (irp_unmarshall_nw(nw, body) != 0) { 164 nw = NULL; 165 } 166 } else { 167 nw = NULL; 168 } 169 170 if (body != NULL) { 171 memput(body, bodylen); 172 } 173 174 return (nw); 175 } 176 177 /*% 178 * struct nwent * nw_byname(struct irs_nw *this, const char *name, int type) 179 * 180 */ 181 182 static struct nwent * 183 nw_byname(struct irs_nw *this, const char *name, int type) { 184 struct pvt *pvt = (struct pvt *)this->private; 185 struct nwent *nw = &pvt->net; 186 char *body = NULL; 187 size_t bodylen; 188 int code; 189 char text[256]; 190 191 if (nw->n_name != NULL && 192 strcmp(name, nw->n_name) == 0 && 193 nw->n_addrtype == type) { 194 return (nw); 195 } 196 197 if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { 198 return (NULL); 199 } 200 201 if (irs_irp_send_command(pvt->girpdata, "getnetbyname %s", name) != 0) 202 return (NULL); 203 204 if (irs_irp_get_full_response(pvt->girpdata, &code, 205 text, sizeof text, 206 &body, &bodylen) != 0) { 207 return (NULL); 208 } 209 210 if (code == IRPD_GETNET_OK) { 211 free_nw(nw); 212 if (irp_unmarshall_nw(nw, body) != 0) { 213 nw = NULL; 214 } 215 } else { 216 nw = NULL; 217 } 218 219 if (body != NULL) { 220 memput(body, bodylen); 221 } 222 223 return (nw); 224 } 225 226 /*% 227 * void nw_rewind(struct irs_nw *this) 228 * 229 */ 230 231 static void 232 nw_rewind(struct irs_nw *this) { 233 struct pvt *pvt = (struct pvt *)this->private; 234 char text[256]; 235 int code; 236 237 if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { 238 return; 239 } 240 241 if (irs_irp_send_command(pvt->girpdata, "setnetent") != 0) { 242 return; 243 } 244 245 code = irs_irp_read_response(pvt->girpdata, text, sizeof text); 246 if (code != IRPD_GETNET_SETOK) { 247 if (irp_log_errors) { 248 syslog(LOG_WARNING, "setnetent failed: %s", text); 249 } 250 } 251 252 return; 253 } 254 255 /*% 256 * Prepares the cache if necessary and returns the first, or 257 * next item from it. 258 */ 259 260 static struct nwent * 261 nw_next(struct irs_nw *this) { 262 struct pvt *pvt = (struct pvt *)this->private; 263 struct nwent *nw = &pvt->net; 264 char *body; 265 size_t bodylen; 266 int code; 267 char text[256]; 268 269 if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { 270 return (NULL); 271 } 272 273 if (irs_irp_send_command(pvt->girpdata, "getnetent") != 0) { 274 return (NULL); 275 } 276 277 if (irs_irp_get_full_response(pvt->girpdata, &code, 278 text, sizeof text, 279 &body, &bodylen) != 0) { 280 return (NULL); 281 } 282 283 if (code == IRPD_GETNET_OK) { 284 free_nw(nw); 285 if (irp_unmarshall_nw(nw, body) != 0) { 286 nw = NULL; 287 } 288 } else { 289 nw = NULL; 290 } 291 292 if (body != NULL) 293 memput(body, bodylen); 294 return (nw); 295 } 296 297 /*% 298 * void nw_minimize(struct irs_nw *this) 299 * 300 */ 301 302 static void 303 nw_minimize(struct irs_nw *this) { 304 struct pvt *pvt = (struct pvt *)this->private; 305 306 irs_irp_disconnect(pvt->girpdata); 307 } 308 309 310 311 312 /* private. */ 313 314 /*% 315 * deallocate all the memory irp_unmarshall_pw allocated. 316 * 317 */ 318 319 static void 320 free_nw(struct nwent *nw) { 321 char **p; 322 323 if (nw == NULL) 324 return; 325 326 if (nw->n_name != NULL) 327 free(nw->n_name); 328 329 if (nw->n_aliases != NULL) { 330 for (p = nw->n_aliases ; *p != NULL ; p++) { 331 free(*p); 332 } 333 free(nw->n_aliases); 334 } 335 336 if (nw->n_addr != NULL) 337 free(nw->n_addr); 338 } 339 340 /*! \file */ 341