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#if defined(LIBC_SCCS) && !defined(lint)
19static const char rcsid[] = "$Id: irp_nw.c,v 1.4 2006/03/09 23:57:56 marka Exp $";
20#endif /* LIBC_SCCS and not lint */
21
22#if 0
23
24#endif
25
26/* Imports */
27
28#include "port_before.h"
29
30#include <syslog.h>
31#include <sys/types.h>
32#include <sys/socket.h>
33
34#include <netinet/in.h>
35#include <arpa/inet.h>
36#include <arpa/nameser.h>
37
38#include <errno.h>
39#include <fcntl.h>
40#include <resolv.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <syslog.h>
45
46#include <irs.h>
47#include <irp.h>
48#include <isc/irpmarshall.h>
49
50#include <isc/memcluster.h>
51#include <isc/misc.h>
52
53#include "irs_p.h"
54#include "lcl_p.h"
55#include "irp_p.h"
56
57#include "port_after.h"
58
59#define MAXALIASES 35
60#define MAXADDRSIZE 4
61
62struct pvt {
63	struct irp_p	       *girpdata;
64	int			warned;
65	struct nwent		net;
66};
67
68/* Forward */
69
70static void		nw_close(struct irs_nw *);
71static struct nwent *	nw_byname(struct irs_nw *, const char *, int);
72static struct nwent *	nw_byaddr(struct irs_nw *, void *, int, int);
73static struct nwent *	nw_next(struct irs_nw *);
74static void		nw_rewind(struct irs_nw *);
75static void		nw_minimize(struct irs_nw *);
76
77static void		free_nw(struct nwent *nw);
78
79
80/* Public */
81
82/*%
83 * struct irs_nw * irs_irp_nw(struct irs_acc *this)
84 *
85 */
86
87struct irs_nw *
88irs_irp_nw(struct irs_acc *this) {
89	struct irs_nw *nw;
90	struct pvt *pvt;
91
92	if (!(pvt = memget(sizeof *pvt))) {
93		errno = ENOMEM;
94		return (NULL);
95	}
96	memset(pvt, 0, sizeof *pvt);
97
98	if (!(nw = memget(sizeof *nw))) {
99		memput(pvt, sizeof *pvt);
100		errno = ENOMEM;
101		return (NULL);
102	}
103	memset(nw, 0x0, sizeof *nw);
104	pvt->girpdata = this->private;
105
106	nw->private = pvt;
107	nw->close = nw_close;
108	nw->byname = nw_byname;
109	nw->byaddr = nw_byaddr;
110	nw->next = nw_next;
111	nw->rewind = nw_rewind;
112	nw->minimize = nw_minimize;
113	return (nw);
114}
115
116/* Methods */
117
118/*%
119 * void nw_close(struct irs_nw *this)
120 *
121 */
122
123static void
124nw_close(struct irs_nw *this) {
125	struct pvt *pvt = (struct pvt *)this->private;
126
127	nw_minimize(this);
128
129	free_nw(&pvt->net);
130
131	memput(pvt, sizeof *pvt);
132	memput(this, sizeof *this);
133}
134
135/*%
136 * struct nwent * nw_byaddr(struct irs_nw *this, void *net,
137 * 				int length, int type)
138 *
139 */
140
141static struct nwent *
142nw_byaddr(struct irs_nw *this, void *net, int length, int type) {
143	struct pvt *pvt = (struct pvt *)this->private;
144	struct nwent *nw = &pvt->net;
145	char *body = NULL;
146	size_t bodylen;
147	int code;
148	char paddr[24];			/*%< bigenough for ip4 w/ cidr spec. */
149	char text[256];
150
151	if (inet_net_ntop(type, net, length, paddr, sizeof paddr) == NULL) {
152		return (NULL);
153	}
154
155	if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
156		return (NULL);
157	}
158
159	if (irs_irp_send_command(pvt->girpdata, "getnetbyaddr %s %s",
160				 paddr, ADDR_T_STR(type)) != 0)
161		return (NULL);
162
163	if (irs_irp_get_full_response(pvt->girpdata, &code,
164				      text, sizeof text,
165				      &body, &bodylen) != 0) {
166		return (NULL);
167	}
168
169	if (code == IRPD_GETNET_OK) {
170		free_nw(nw);
171		if (irp_unmarshall_nw(nw, body) != 0) {
172			nw = NULL;
173		}
174	} else {
175		nw = NULL;
176	}
177
178	if (body != NULL) {
179		memput(body, bodylen);
180	}
181
182	return (nw);
183}
184
185/*%
186 * struct nwent * nw_byname(struct irs_nw *this, const char *name, int type)
187 *
188 */
189
190static struct nwent *
191nw_byname(struct irs_nw *this, const char *name, int type) {
192	struct pvt *pvt = (struct pvt *)this->private;
193	struct nwent *nw = &pvt->net;
194	char *body = NULL;
195	size_t bodylen;
196	int code;
197	char text[256];
198
199	if (nw->n_name != NULL &&
200	    strcmp(name, nw->n_name) == 0 &&
201	    nw->n_addrtype == type) {
202		return (nw);
203	}
204
205	if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
206		return (NULL);
207	}
208
209	if (irs_irp_send_command(pvt->girpdata, "getnetbyname %s", name) != 0)
210		return (NULL);
211
212	if (irs_irp_get_full_response(pvt->girpdata, &code,
213				      text, sizeof text,
214				      &body, &bodylen) != 0) {
215		return (NULL);
216	}
217
218	if (code == IRPD_GETNET_OK) {
219		free_nw(nw);
220		if (irp_unmarshall_nw(nw, body) != 0) {
221			nw = NULL;
222		}
223	} else {
224		nw = NULL;
225	}
226
227	if (body != NULL) {
228		memput(body, bodylen);
229	}
230
231	return (nw);
232}
233
234/*%
235 * void nw_rewind(struct irs_nw *this)
236 *
237 */
238
239static void
240nw_rewind(struct irs_nw *this) {
241	struct pvt *pvt = (struct pvt *)this->private;
242	char text[256];
243	int code;
244
245	if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
246		return;
247	}
248
249	if (irs_irp_send_command(pvt->girpdata, "setnetent") != 0) {
250		return;
251	}
252
253	code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
254	if (code != IRPD_GETNET_SETOK) {
255		if (irp_log_errors) {
256			syslog(LOG_WARNING, "setnetent failed: %s", text);
257		}
258	}
259
260	return;
261}
262
263/*%
264 * 	Prepares the cache if necessary and returns the first, or
265 * 	next item from it.
266 */
267
268static struct nwent *
269nw_next(struct irs_nw *this) {
270	struct pvt *pvt = (struct pvt *)this->private;
271	struct nwent *nw = &pvt->net;
272	char *body;
273	size_t bodylen;
274	int code;
275	char text[256];
276
277	if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
278		return (NULL);
279	}
280
281	if (irs_irp_send_command(pvt->girpdata, "getnetent") != 0) {
282		return (NULL);
283	}
284
285	if (irs_irp_get_full_response(pvt->girpdata, &code,
286				      text, sizeof text,
287				      &body, &bodylen) != 0) {
288		return (NULL);
289	}
290
291	if (code == IRPD_GETNET_OK) {
292		free_nw(nw);
293		if (irp_unmarshall_nw(nw, body) != 0) {
294			nw = NULL;
295		}
296	} else {
297		nw = NULL;
298	}
299
300	if (body != NULL)
301		memput(body, bodylen);
302	return (nw);
303}
304
305/*%
306 * void nw_minimize(struct irs_nw *this)
307 *
308 */
309
310static void
311nw_minimize(struct irs_nw *this) {
312	struct pvt *pvt = (struct pvt *)this->private;
313
314	irs_irp_disconnect(pvt->girpdata);
315}
316
317
318
319
320/* private. */
321
322/*%
323 *	deallocate all the memory irp_unmarshall_pw allocated.
324 *
325 */
326
327static void
328free_nw(struct nwent *nw) {
329	char **p;
330
331	if (nw == NULL)
332		return;
333
334	if (nw->n_name != NULL)
335		free(nw->n_name);
336
337	if (nw->n_aliases != NULL) {
338		for (p = nw->n_aliases ; *p != NULL ; p++) {
339			free(*p);
340		}
341		free(nw->n_aliases);
342	}
343
344	if (nw->n_addr != NULL)
345		free(nw->n_addr);
346}
347
348/*! \file */
349