slaacctl.c revision 1.7 
1/*	$OpenBSD: slaacctl.c,v 1.7 2017/05/30 18:18:08 deraadt Exp $	*/
2
3/*
4 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
5 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
6 * Copyright (c) 2003 Henning Brauer <henning@openbsd.org>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21#include <sys/types.h>
22#include <sys/queue.h>
23#include <sys/socket.h>
24#include <sys/un.h>
25#include <arpa/inet.h>
26
27#include <net/if.h>
28#include <net/if_media.h>
29#include <net/if_types.h>
30
31#include <netinet/in.h>
32#include <netinet/if_ether.h>
33
34#include <err.h>
35#include <errno.h>
36#include <event.h>
37#include <imsg.h>
38#include <netdb.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44#include "slaacd.h"
45#include "frontend.h"
46#include "parser.h"
47
48__dead void	 usage(void);
49int		 show_interface_msg(struct imsg *);
50
51struct imsgbuf	*ibuf;
52
53__dead void
54usage(void)
55{
56	extern char *__progname;
57
58	fprintf(stderr, "usage: %s [-s socket] command [argument ...]\n",
59	    __progname);
60	exit(1);
61}
62
63int
64main(int argc, char *argv[])
65{
66	struct sockaddr_un	 sun;
67	struct parse_result	*res;
68	struct imsg		 imsg;
69	int			 ctl_sock;
70	int			 done = 0;
71	int			 n, verbose = 0;
72	int			 ch;
73	char			*sockname;
74
75	sockname = SLAACD_SOCKET;
76	while ((ch = getopt(argc, argv, "s:")) != -1) {
77		switch (ch) {
78		case 's':
79			sockname = optarg;
80			break;
81		default:
82			usage();
83		}
84	}
85	argc -= optind;
86	argv += optind;
87
88	/* Parse command line. */
89	if ((res = parse(argc, argv)) == NULL)
90		exit(1);
91
92	/* Connect to control socket. */
93	if ((ctl_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
94		err(1, "socket");
95
96	memset(&sun, 0, sizeof(sun));
97	sun.sun_family = AF_UNIX;
98
99	strlcpy(sun.sun_path, sockname, sizeof(sun.sun_path));
100	if (connect(ctl_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
101		err(1, "connect: %s", sockname);
102
103	if (pledge("stdio", NULL) == -1)
104		err(1, "pledge");
105
106	if ((ibuf = malloc(sizeof(struct imsgbuf))) == NULL)
107		err(1, NULL);
108	imsg_init(ibuf, ctl_sock);
109	done = 0;
110
111	/* Process user request. */
112	switch (res->action) {
113	case LOG_VERBOSE:
114		verbose = 1;
115		/* FALLTHROUGH */
116	case LOG_BRIEF:
117		imsg_compose(ibuf, IMSG_CTL_LOG_VERBOSE, 0, 0, -1,
118		    &verbose, sizeof(verbose));
119		printf("logging request sent.\n");
120		done = 1;
121		break;
122	case SHOW_INTERFACE:
123		imsg_compose(ibuf, IMSG_CTL_SHOW_INTERFACE_INFO, 0, 0, -1,
124		    &res->if_index, sizeof(res->if_index));
125		break;
126	case SEND_SOLICITATION:
127		imsg_compose(ibuf, IMSG_CTL_SEND_SOLICITATION, 0, 0, -1,
128		    &res->if_index, sizeof(res->if_index));
129		done = 1;
130		break;
131	default:
132		usage();
133	}
134
135	while (ibuf->w.queued)
136		if (msgbuf_write(&ibuf->w) <= 0 && errno != EAGAIN)
137			err(1, "write error");
138
139	while (!done) {
140		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
141			errx(1, "imsg_read error");
142		if (n == 0)
143			errx(1, "pipe closed");
144
145		while (!done) {
146			if ((n = imsg_get(ibuf, &imsg)) == -1)
147				errx(1, "imsg_get error");
148			if (n == 0)
149				break;
150
151			switch (res->action) {
152			case SHOW_INTERFACE:
153				done = show_interface_msg(&imsg);
154				break;
155			default:
156				break;
157			}
158
159			imsg_free(&imsg);
160		}
161	}
162	close(ctl_sock);
163	free(ibuf);
164
165	return (0);
166}
167
168int
169show_interface_msg(struct imsg *imsg)
170{
171	static int				 if_count = 0;
172	struct ctl_engine_info			*cei;
173	struct ctl_engine_info_ra		*cei_ra;
174	struct ctl_engine_info_ra_prefix	*cei_ra_prefix;
175	struct ctl_engine_info_ra_rdns		*cei_ra_rdns;
176	struct ctl_engine_info_ra_dnssl		*cei_ra_dnssl;
177	struct ctl_engine_info_address_proposal	*cei_addr_proposal;
178	struct ctl_engine_info_dfr_proposal	*cei_dfr_proposal;
179	struct tm				*t;
180	struct timespec				 now, diff;
181	char					 buf[IF_NAMESIZE], *bufp;
182	char					 hbuf[NI_MAXHOST], whenbuf[255];
183	char					 ntopbuf[INET6_ADDRSTRLEN];
184
185	switch (imsg->hdr.type) {
186	case IMSG_CTL_SHOW_INTERFACE_INFO:
187		cei = imsg->data;
188
189		if (if_count++ > 0)
190			printf("\n");
191
192		bufp = if_indextoname(cei->if_index, buf);
193		printf("%s:\n", bufp != NULL ? bufp : "unknown");
194		printf("\t index: %3u ", cei->if_index);
195		printf("running: %3s ", cei->running ? "yes" : "no");
196		printf("privacy: %3s\n", cei->autoconfprivacy ? "yes" : "no");
197		printf("\tlladdr: %s\n", ether_ntoa(&cei->hw_address));
198		if (getnameinfo((struct sockaddr *)&cei->ll_address,
199		    cei->ll_address.sin6_len, hbuf, sizeof(hbuf), NULL, 0,
200		    NI_NUMERICHOST | NI_NUMERICSERV))
201			err(1, "cannot get link local address");
202		printf("\t inet6: %s\n", hbuf);
203		break;
204	case IMSG_CTL_SHOW_INTERFACE_INFO_RA:
205		cei_ra = imsg->data;
206
207		if (getnameinfo((struct sockaddr *)&cei_ra->from,
208		    cei_ra->from.sin6_len, hbuf, sizeof(hbuf), NULL, 0,
209		    NI_NUMERICHOST | NI_NUMERICSERV))
210			err(1, "cannot get router IP");
211
212		if (clock_gettime(CLOCK_MONOTONIC, &now))
213			err(1, "clock_gettime");
214
215		timespecsub(&now, &cei_ra->uptime, &diff);
216
217		t = localtime(&cei_ra->when.tv_sec);
218		strftime(whenbuf, sizeof(whenbuf), "%F %T", t);
219		printf("\tRouter Advertisement from %s\n", hbuf);
220		printf("\t\treceived: %s.%09ld; %lld.%09lds ago\n",
221		    whenbuf, cei_ra->when.tv_nsec, diff.tv_sec, diff.tv_nsec);
222		printf("\t\tCur Hop Limit: %3u, M: %d, O: %d, Router Lifetime:"
223		    " %5us\n", cei_ra->curhoplimit, cei_ra->managed ? 1: 0,
224		    cei_ra->other ? 1 : 0, cei_ra->router_lifetime);
225		printf("\t\tDefault Router Preference: %s\n", cei_ra->rpref);
226		printf("\t\tReachable Time: %9ums, Retrans Timer: %9ums\n",
227		    cei_ra->reachable_time, cei_ra->retrans_time);
228		break;
229	case IMSG_CTL_SHOW_INTERFACE_INFO_RA_PREFIX:
230		cei_ra_prefix = imsg->data;
231		printf("\t\tprefix: %s/%u\n", inet_ntop(AF_INET6,
232		    &cei_ra_prefix->prefix, ntopbuf, INET6_ADDRSTRLEN),
233			    cei_ra_prefix->prefix_len);
234		printf("\t\t\tOn-link: %d, Autonomous address-configuration: %d"
235		    "\n", cei_ra_prefix->onlink ? 1 : 0,
236		    cei_ra_prefix->autonomous ? 1 : 0);
237		printf("\t\t\tvltime: %9u, pltime: %9u\n",
238		    cei_ra_prefix->vltime, cei_ra_prefix->pltime);
239		break;
240	case IMSG_CTL_SHOW_INTERFACE_INFO_RA_RDNS:
241		cei_ra_rdns = imsg->data;
242		printf("\t\trdns: %s, lifetime: %u\n", inet_ntop(AF_INET6,
243		    &cei_ra_rdns->rdns, ntopbuf, INET6_ADDRSTRLEN),
244		    cei_ra_rdns->lifetime);
245		break;
246	case IMSG_CTL_SHOW_INTERFACE_INFO_RA_DNSSL:
247		cei_ra_dnssl = imsg->data;
248		printf("\t\tsearch: %s, lifetime: %u\n", cei_ra_dnssl->dnssl,
249		    cei_ra_dnssl->lifetime);
250		break;
251	case IMSG_CTL_SHOW_INTERFACE_INFO_ADDR_PROPOSALS:
252		printf("\tAddress proposals\n");
253		break;
254	case IMSG_CTL_SHOW_INTERFACE_INFO_ADDR_PROPOSAL:
255		cei_addr_proposal = imsg->data;
256
257		if (getnameinfo((struct sockaddr *)&cei_addr_proposal->addr,
258		    cei_addr_proposal->addr.sin6_len, hbuf, sizeof(hbuf),
259		    NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV))
260			err(1, "cannot get router IP");
261
262		printf("\t\tid: %4lld, state: %15s, privacy: %s\n",
263		    cei_addr_proposal->id, cei_addr_proposal->state,
264		    cei_addr_proposal->privacy ? "y" : "n");
265		printf("\t\tvltime: %10u, pltime: %10u\n",
266		    cei_addr_proposal->vltime, cei_addr_proposal->pltime);
267
268		if (clock_gettime(CLOCK_MONOTONIC, &now))
269			err(1, "clock_gettime");
270
271		timespecsub(&now, &cei_addr_proposal->uptime, &diff);
272
273		t = localtime(&cei_addr_proposal->when.tv_sec);
274		strftime(whenbuf, sizeof(whenbuf), "%F %T", t);
275		printf("\t\tupdated: %s.%09ld; %lld.%09lds ago\n",
276		    whenbuf, cei_addr_proposal->when.tv_nsec, diff.tv_sec,
277		    diff.tv_nsec);
278		printf("\t\t%s, %s/%u\n", hbuf, inet_ntop(AF_INET6,
279		    &cei_addr_proposal->prefix, ntopbuf, INET6_ADDRSTRLEN),
280		    cei_addr_proposal->prefix_len);
281		break;
282	case IMSG_CTL_SHOW_INTERFACE_INFO_DFR_PROPOSALS:
283		printf("\tDefault router proposals\n");
284		break;
285	case IMSG_CTL_SHOW_INTERFACE_INFO_DFR_PROPOSAL:
286		cei_dfr_proposal = imsg->data;
287
288		if (getnameinfo((struct sockaddr *)&cei_dfr_proposal->addr,
289		    cei_dfr_proposal->addr.sin6_len, hbuf, sizeof(hbuf),
290		    NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV))
291			err(1, "cannot get router IP");
292
293		printf("\t\tid: %4lld, state: %15s\n",
294		    cei_dfr_proposal->id, cei_dfr_proposal->state);
295		printf("\t\trouter lifetime: %10u\n",
296		    cei_dfr_proposal->router_lifetime);
297		printf("\t\tPreference: %s\n", cei_dfr_proposal->rpref);
298		if (clock_gettime(CLOCK_MONOTONIC, &now))
299			err(1, "clock_gettime");
300
301		timespecsub(&now, &cei_dfr_proposal->uptime, &diff);
302
303		t = localtime(&cei_dfr_proposal->when.tv_sec);
304		strftime(whenbuf, sizeof(whenbuf), "%F %T", t);
305		printf("\t\tupdated: %s.%09ld; %lld.%09lds ago\n",
306		    whenbuf, cei_dfr_proposal->when.tv_nsec, diff.tv_sec,
307		    diff.tv_nsec);
308
309		break;
310	case IMSG_CTL_END:
311		printf("\n");
312		return (1);
313	default:
314		break;
315	}
316
317	return (0);
318}
319