1 /* $OpenBSD: print-pfsync.c,v 1.44 2021/12/01 18:28:46 deraadt 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
pfsync_if_print(u_char * user,const struct pcap_pkthdr * h,const u_char * p)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
64 ts_print(&h->ts);
65
66 if (caplen < PFSYNC_HDRLEN) {
67 printf("[|pfsync]");
68 goto out;
69 }
70
71 pfsync_print((struct pfsync_header *)p,
72 p + sizeof(struct pfsync_header),
73 caplen - sizeof(struct pfsync_header));
74 out:
75 if (xflag) {
76 default_print((const u_char *)p, caplen);
77 }
78 putchar('\n');
79 }
80
81 void
pfsync_ip_print(const u_char * bp,u_int len,const u_char * bp2)82 pfsync_ip_print(const u_char *bp, u_int len, const u_char *bp2)
83 {
84 struct pfsync_header *hdr = (struct pfsync_header *)bp;
85 struct ip *ip = (struct ip *)bp2;
86
87 if (vflag)
88 printf("%s > %s: ", ipaddr_string(&ip->ip_src),
89 ipaddr_string(&ip->ip_dst));
90 else
91 printf("%s: ", ipaddr_string(&ip->ip_src));
92
93 if (len < PFSYNC_HDRLEN)
94 printf("[|pfsync]");
95 else
96 pfsync_print(hdr, bp + sizeof(struct pfsync_header),
97 len - sizeof(struct pfsync_header));
98 putchar('\n');
99 }
100
101 const char *actnames[] = { PFSYNC_ACTIONS };
102
103 struct pfsync_actions {
104 size_t len;
105 int (*print)(int, const void *);
106 };
107
108 int pfsync_print_clr(int, const void *);
109 int pfsync_print_state(int, const void *);
110 int pfsync_print_ins_ack(int, const void *);
111 int pfsync_print_upd_c(int, const void *);
112 int pfsync_print_upd_req(int, const void *);
113 int pfsync_print_del_c(int, const void *);
114 int pfsync_print_bus(int, const void *);
115 int pfsync_print_tdb(int, const void *);
116 int pfsync_print_eof(int, const void *);
117
118 struct pfsync_actions actions[] = {
119 { sizeof(struct pfsync_clr), pfsync_print_clr },
120 { 0, NULL },
121 { sizeof(struct pfsync_ins_ack), pfsync_print_ins_ack },
122 { 0, NULL },
123 { sizeof(struct pfsync_upd_c), pfsync_print_upd_c },
124 { sizeof(struct pfsync_upd_req), pfsync_print_upd_req },
125 { sizeof(struct pfsync_state), pfsync_print_state },
126 { sizeof(struct pfsync_del_c), pfsync_print_del_c },
127 { 0, NULL },
128 { 0, NULL },
129 { sizeof(struct pfsync_bus), pfsync_print_bus },
130 { 0, NULL },
131 { 0, pfsync_print_eof },
132 { sizeof(struct pfsync_state), pfsync_print_state },
133 { sizeof(struct pfsync_state), pfsync_print_state },
134 { sizeof(struct pfsync_tdb), pfsync_print_tdb },
135 };
136
137 void
pfsync_print(struct pfsync_header * hdr,const u_char * bp,int len)138 pfsync_print(struct pfsync_header *hdr, const u_char *bp, int len)
139 {
140 struct pfsync_subheader *subh;
141 int count, plen, alen, flags = 0;
142 int i;
143
144 plen = ntohs(hdr->len);
145
146 printf("PFSYNCv%d len %d", hdr->version, plen);
147
148 if (hdr->version != PFSYNC_VERSION)
149 return;
150
151 plen -= sizeof(*hdr);
152
153 if (vflag)
154 flags |= PF_OPT_VERBOSE;
155 if (vflag > 1)
156 flags |= PF_OPT_VERBOSE2;
157 if (!nflag)
158 flags |= PF_OPT_USEDNS;
159
160 while (plen > 0) {
161 if (len < sizeof(*subh))
162 break;
163
164 subh = (struct pfsync_subheader *)bp;
165 bp += sizeof(*subh);
166 len -= sizeof(*subh);
167 plen -= sizeof(*subh);
168
169 if (subh->action >= PFSYNC_ACT_MAX) {
170 printf("\n act UNKNOWN id %d", subh->action);
171 return;
172 }
173
174 count = ntohs(subh->count);
175 printf("\n act %s count %d", actnames[subh->action], count);
176 alen = actions[subh->action].len;
177
178 if (actions[subh->action].print == NULL) {
179 printf("\n unimplemented action");
180 return;
181 }
182
183 for (i = 0; i < count; i++) {
184 if (len < alen) {
185 len = 0;
186 break;
187 }
188
189 if (actions[subh->action].print(flags, bp) != 0)
190 return;
191
192 bp += alen;
193 len -= alen;
194 plen -= alen;
195 }
196 }
197
198 if (plen > 0) {
199 printf("\n ...");
200 return;
201 }
202 if (plen < 0) {
203 printf("\n invalid header length");
204 return;
205 }
206 if (len > 0)
207 printf("\n invalid packet length");
208 }
209
210 int
pfsync_print_clr(int flags,const void * bp)211 pfsync_print_clr(int flags, const void *bp)
212 {
213 const struct pfsync_clr *clr = bp;
214 char ifname[IFNAMSIZ * 4 + 1];
215 char *cp = ifname;
216 int i;
217
218 printf("\n\tcreatorid: %08x", htonl(clr->creatorid));
219 if (clr->ifname[0] != '\0') {
220 /* Treat clr->ifname as untrusted input. */
221 for (i = 0; i < IFNAMSIZ && clr->ifname[i] != '\0'; i++)
222 cp = vis(cp, clr->ifname[i], VIS_WHITE, 0);
223 printf(" interface: %s", ifname);
224 }
225
226 return (0);
227 }
228
229 int
pfsync_print_state(int flags,const void * bp)230 pfsync_print_state(int flags, const void *bp)
231 {
232 struct pfsync_state *st = (struct pfsync_state *)bp;
233 putchar('\n');
234 print_state(st, flags);
235 return (0);
236 }
237
238 int
pfsync_print_ins_ack(int flags,const void * bp)239 pfsync_print_ins_ack(int flags, const void *bp)
240 {
241 const struct pfsync_ins_ack *iack = bp;
242
243 printf("\n\tid: %016llx creatorid: %08x", betoh64(iack->id),
244 ntohl(iack->creatorid));
245
246 return (0);
247 }
248
249 int
pfsync_print_upd_c(int flags,const void * bp)250 pfsync_print_upd_c(int flags, const void *bp)
251 {
252 const struct pfsync_upd_c *u = bp;
253
254 printf("\n\tid: %016llx creatorid: %08x", betoh64(u->id),
255 ntohl(u->creatorid));
256
257 return (0);
258 }
259
260 int
pfsync_print_upd_req(int flags,const void * bp)261 pfsync_print_upd_req(int flags, const void *bp)
262 {
263 const struct pfsync_upd_req *ur = bp;
264
265 printf("\n\tid: %016llx creatorid: %08x", betoh64(ur->id),
266 ntohl(ur->creatorid));
267
268 return (0);
269 }
270
271 int
pfsync_print_del_c(int flags,const void * bp)272 pfsync_print_del_c(int flags, const void *bp)
273 {
274 const struct pfsync_del_c *d = bp;
275
276 printf("\n\tid: %016llx creatorid: %08x", betoh64(d->id),
277 ntohl(d->creatorid));
278
279 return (0);
280 }
281
282 int
pfsync_print_bus(int flags,const void * bp)283 pfsync_print_bus(int flags, const void *bp)
284 {
285 const struct pfsync_bus *b = bp;
286 u_int32_t endtime;
287 int min, sec;
288 const char *status;
289
290 endtime = ntohl(b->endtime);
291 sec = endtime % 60;
292 endtime /= 60;
293 min = endtime % 60;
294 endtime /= 60;
295
296 switch (b->status) {
297 case PFSYNC_BUS_START:
298 status = "start";
299 break;
300 case PFSYNC_BUS_END:
301 status = "end";
302 break;
303 default:
304 status = "UNKNOWN";
305 break;
306 }
307
308 printf("\n\tcreatorid: %08x age: %.2u:%.2u:%.2u status: %s",
309 htonl(b->creatorid), endtime, min, sec, status);
310
311 return (0);
312 }
313
314 int
pfsync_print_tdb(int flags,const void * bp)315 pfsync_print_tdb(int flags, const void *bp)
316 {
317 const struct pfsync_tdb *t = bp;
318
319 printf("\n\tspi: 0x%08x rpl: %llu cur_bytes: %llu",
320 ntohl(t->spi), betoh64(t->rpl), betoh64(t->cur_bytes));
321
322 return (0);
323 }
324
325 int
pfsync_print_eof(int flags,const void * bp)326 pfsync_print_eof(int flags, const void *bp)
327 {
328 return (1);
329 }
330