xref: /openbsd-src/usr.sbin/tcpdump/print-pfsync.c (revision 0c21bd8129193e1349a6e72217c894714cfdf39b) 
1 /*	$OpenBSD: print-pfsync.c,v 1.45 2024/12/11 04:05:53 dlg Exp $	*/
2 
3 /*
4  * Copyright (c) 2002 Michael Shalayeff
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26  * THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/time.h>
30 #include <sys/socket.h>
31 #include <sys/file.h>
32 #include <sys/ioctl.h>
33 
34 #include <net/if.h>
35 
36 #include <netinet/in.h>
37 #include <netinet/ip.h>
38 #include <netinet/ip_ipsp.h>
39 
40 #include <net/pfvar.h>
41 #include <net/if_pfsync.h>
42 
43 #include <ctype.h>
44 #include <netdb.h>
45 #include <pcap.h>
46 #include <signal.h>
47 #include <stdio.h>
48 #include <string.h>
49 #include <vis.h>
50 
51 #include "interface.h"
52 #include "addrtoname.h"
53 #include "pfctl_parser.h"
54 #include "pfctl.h"
55 
56 void	pfsync_print(struct pfsync_header *, const u_char *, int);
57 
58 void
59 pfsync_if_print(u_char *user, const struct pcap_pkthdr *h,
60      const u_char *p)
61 {
62 	u_int caplen = h->caplen;
63 	snapend = p + caplen;
64 
65 	ts_print(&h->ts);
66 
67 	if (caplen < PFSYNC_HDRLEN) {
68 		printf("[|pfsync]");
69 		goto out;
70 	}
71 
72 	pfsync_print((struct pfsync_header *)p,
73 	    p + sizeof(struct pfsync_header),
74 	    caplen - sizeof(struct pfsync_header));
75 out:
76 	if (xflag) {
77 		default_print((const u_char *)p, caplen);
78 	}
79 	putchar('\n');
80 }
81 
82 void
83 pfsync_ip_print(const u_char *bp, u_int len, const u_char *bp2)
84 {
85 	struct pfsync_header *hdr = (struct pfsync_header *)bp;
86 	struct ip *ip = (struct ip *)bp2;
87 
88 	if (vflag)
89 		printf("%s > %s: ", ipaddr_string(&ip->ip_src),
90 		    ipaddr_string(&ip->ip_dst));
91 	else
92 		printf("%s: ", ipaddr_string(&ip->ip_src));
93 
94 	if (len < PFSYNC_HDRLEN)
95 		printf("[|pfsync]");
96 	else
97 		pfsync_print(hdr, bp + sizeof(struct pfsync_header),
98 		    len - sizeof(struct pfsync_header));
99 	putchar('\n');
100 }
101 
102 const char *actnames[] = { PFSYNC_ACTIONS };
103 
104 struct pfsync_actions {
105 	size_t len;
106 	int (*print)(int, const void *);
107 };
108 
109 int	pfsync_print_clr(int, const void *);
110 int	pfsync_print_state(int, const void *);
111 int	pfsync_print_ins_ack(int, const void *);
112 int	pfsync_print_upd_c(int, const void *);
113 int	pfsync_print_upd_req(int, const void *);
114 int	pfsync_print_del_c(int, const void *);
115 int	pfsync_print_bus(int, const void *);
116 int	pfsync_print_tdb(int, const void *);
117 int	pfsync_print_eof(int, const void *);
118 
119 struct pfsync_actions actions[] = {
120 	{ sizeof(struct pfsync_clr),		pfsync_print_clr },
121 	{ 0,					NULL },
122 	{ sizeof(struct pfsync_ins_ack),	pfsync_print_ins_ack },
123 	{ 0,					NULL },
124 	{ sizeof(struct pfsync_upd_c),		pfsync_print_upd_c },
125 	{ sizeof(struct pfsync_upd_req),	pfsync_print_upd_req },
126 	{ sizeof(struct pfsync_state),		pfsync_print_state },
127 	{ sizeof(struct pfsync_del_c),		pfsync_print_del_c },
128 	{ 0,					NULL },
129 	{ 0,					NULL },
130 	{ sizeof(struct pfsync_bus),		pfsync_print_bus },
131 	{ 0,					NULL },
132 	{ 0,					pfsync_print_eof },
133 	{ sizeof(struct pfsync_state),		pfsync_print_state },
134 	{ sizeof(struct pfsync_state),		pfsync_print_state },
135 	{ sizeof(struct pfsync_tdb),		pfsync_print_tdb },
136 };
137 
138 void
139 pfsync_print(struct pfsync_header *hdr, const u_char *bp, int len)
140 {
141 	struct pfsync_subheader *subh;
142 	int count, plen, alen, flags = 0;
143 	int i;
144 
145 	plen = ntohs(hdr->len);
146 
147 	printf("PFSYNCv%d len %d", hdr->version, plen);
148 
149 	if (hdr->version != PFSYNC_VERSION)
150 		return;
151 
152 	plen -= sizeof(*hdr);
153 
154 	if (vflag)
155 		flags |= PF_OPT_VERBOSE;
156 	if (vflag > 1)
157 		flags |= PF_OPT_VERBOSE2;
158 	if (!nflag)
159 		flags |= PF_OPT_USEDNS;
160 
161 	while (plen > 0) {
162 		if (len < sizeof(*subh))
163 			break;
164 
165 		subh = (struct pfsync_subheader *)bp;
166 		bp += sizeof(*subh);
167 		len -= sizeof(*subh);
168 		plen -= sizeof(*subh);
169 
170 		if (subh->action >= PFSYNC_ACT_MAX) {
171 			printf("\n    act UNKNOWN id %d", subh->action);
172 			return;
173 		}
174 
175 		count = ntohs(subh->count);
176 		printf("\n    act %s count %d", actnames[subh->action], count);
177 		alen = actions[subh->action].len;
178 
179 		if (actions[subh->action].print == NULL) {
180 			printf("\n    unimplemented action");
181 			return;
182 		}
183 
184 		for (i = 0; i < count; i++) {
185 			if (len < alen) {
186 				len = 0;
187 				break;
188 			}
189 
190 			if (actions[subh->action].print(flags, bp) != 0)
191 				return;
192 
193 			bp += alen;
194 			len -= alen;
195 			plen -= alen;
196 		}
197 	}
198 
199 	if (plen > 0) {
200 		printf("\n    ...");
201 		return;
202 	}
203 	if (plen < 0) {
204 		printf("\n    invalid header length");
205 		return;
206 	}
207 	if (len > 0)
208 		printf("\n    invalid packet length");
209 }
210 
211 int
212 pfsync_print_clr(int flags, const void *bp)
213 {
214 	const struct pfsync_clr *clr = bp;
215 	char ifname[IFNAMSIZ * 4 + 1];
216 	char *cp = ifname;
217 	int i;
218 
219 	printf("\n\tcreatorid: %08x", htonl(clr->creatorid));
220 	if (clr->ifname[0] != '\0') {
221 		/* Treat clr->ifname as untrusted input. */
222 		for (i = 0; i < IFNAMSIZ && clr->ifname[i] != '\0'; i++)
223 			cp = vis(cp, clr->ifname[i], VIS_WHITE, 0);
224 		printf(" interface: %s", ifname);
225 	}
226 
227 	return (0);
228 }
229 
230 int
231 pfsync_print_state(int flags, const void *bp)
232 {
233 	struct pfsync_state *st = (struct pfsync_state *)bp;
234 	putchar('\n');
235 	print_state(st, flags);
236 	return (0);
237 }
238 
239 int
240 pfsync_print_ins_ack(int flags, const void *bp)
241 {
242 	const struct pfsync_ins_ack *iack = bp;
243 
244 	printf("\n\tid: %016llx creatorid: %08x", betoh64(iack->id),
245 	    ntohl(iack->creatorid));
246 
247 	return (0);
248 }
249 
250 int
251 pfsync_print_upd_c(int flags, const void *bp)
252 {
253 	const struct pfsync_upd_c *u = bp;
254 
255 	printf("\n\tid: %016llx creatorid: %08x", betoh64(u->id),
256 	    ntohl(u->creatorid));
257 
258 	return (0);
259 }
260 
261 int
262 pfsync_print_upd_req(int flags, const void *bp)
263 {
264 	const struct pfsync_upd_req *ur = bp;
265 
266 	printf("\n\tid: %016llx creatorid: %08x", betoh64(ur->id),
267 	    ntohl(ur->creatorid));
268 
269 	return (0);
270 }
271 
272 int
273 pfsync_print_del_c(int flags, const void *bp)
274 {
275 	const struct pfsync_del_c *d = bp;
276 
277 	printf("\n\tid: %016llx creatorid: %08x", betoh64(d->id),
278 	    ntohl(d->creatorid));
279 
280 	return (0);
281 }
282 
283 int
284 pfsync_print_bus(int flags, const void *bp)
285 {
286 	const struct pfsync_bus *b = bp;
287 	u_int32_t endtime;
288 	int min, sec;
289 	const char *status;
290 
291 	endtime = ntohl(b->endtime);
292 	sec = endtime % 60;
293 	endtime /= 60;
294 	min = endtime % 60;
295 	endtime /= 60;
296 
297 	switch (b->status) {
298 	case PFSYNC_BUS_START:
299 		status = "start";
300 		break;
301 	case PFSYNC_BUS_END:
302 		status = "end";
303 		break;
304 	default:
305 		status = "UNKNOWN";
306 		break;
307 	}
308 
309 	printf("\n\tcreatorid: %08x age: %.2u:%.2u:%.2u status: %s",
310 	    htonl(b->creatorid), endtime, min, sec, status);
311 
312 	return (0);
313 }
314 
315 int
316 pfsync_print_tdb(int flags, const void *bp)
317 {
318 	const struct pfsync_tdb *t = bp;
319 
320 	printf("\n\tspi: 0x%08x rpl: %llu cur_bytes: %llu",
321 	    ntohl(t->spi), betoh64(t->rpl), betoh64(t->cur_bytes));
322 
323 	return (0);
324 }
325 
326 int
327 pfsync_print_eof(int flags, const void *bp)
328 {
329 	return (1);
330 }
331