1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  * Copyright 2012 Milan Jurik. All rights reserved.
25  */
26 
27 #include <stdio.h>
28 #include <string.h>
29 #include <fcntl.h>
30 #include <string.h>
31 #include <sys/types.h>
32 #include <sys/time.h>
33 
34 #include <sys/stropts.h>
35 #include <sys/socket.h>
36 #include <net/if.h>
37 #include <netinet/in_systm.h>
38 #include <netinet/in.h>
39 #include <netinet/ip.h>
40 #include <netinet/ip6.h>
41 #include <netinet/ip_icmp.h>
42 #include <netinet/icmp6.h>
43 #include <netinet/if_ether.h>
44 #include <inet/ip.h>
45 #include <inet/ip6.h>
46 #include <arpa/inet.h>
47 #include <netdb.h>
48 #include <tsol/label.h>
49 #include <sys/tsol/tndb.h>
50 #include <sys/tsol/label_macro.h>
51 
52 #include "snoop.h"
53 
54 
55 /*
56  * IPv6 extension header masks.  These are used by the print_ipv6_extensions()
57  * function to return information to the caller about which extension headers
58  * were processed.  This can be useful if the caller wants to know if the
59  * packet is an IPv6 fragment, for example.
60  */
61 #define	SNOOP_HOPOPTS	0x01U
62 #define	SNOOP_ROUTING	0x02U
63 #define	SNOOP_DSTOPTS	0x04U
64 #define	SNOOP_FRAGMENT	0x08U
65 #define	SNOOP_AH	0x10U
66 #define	SNOOP_ESP	0x20U
67 #define	SNOOP_IPV6	0x40U
68 
69 static void prt_routing_hdr(int, const struct ip6_rthdr *);
70 static void prt_fragment_hdr(int, const struct ip6_frag *);
71 static void prt_hbh_options(int, const struct ip6_hbh *);
72 static void prt_dest_options(int, const struct ip6_dest *);
73 static void print_route(const uchar_t *);
74 static void print_ipoptions(const uchar_t *, int);
75 static void print_ripso(const uchar_t *);
76 static void print_cipso(const uchar_t *);
77 
78 /* Keep track of how many nested IP headers we have. */
79 unsigned int encap_levels;
80 unsigned int total_encap_levels = 1;
81 
82 int
interpret_ip(int flags,const struct ip * ip,int fraglen)83 interpret_ip(int flags, const struct ip *ip, int fraglen)
84 {
85 	uchar_t *data;
86 	char buff[24];
87 	boolean_t isfrag = B_FALSE;
88 	boolean_t morefrag;
89 	uint16_t fragoffset;
90 	int hdrlen;
91 	uint16_t iplen, uitmp;
92 
93 	if (ip->ip_v == IPV6_VERSION) {
94 		iplen = interpret_ipv6(flags, (ip6_t *)ip, fraglen);
95 		return (iplen);
96 	}
97 
98 	if (encap_levels == 0)
99 		total_encap_levels = 0;
100 	encap_levels++;
101 	total_encap_levels++;
102 
103 	hdrlen = ip->ip_hl * 4;
104 	data = ((uchar_t *)ip) + hdrlen;
105 	iplen = ntohs(ip->ip_len) - hdrlen;
106 	fraglen -= hdrlen;
107 	if (fraglen > iplen)
108 		fraglen = iplen;
109 	if (fraglen < 0) {
110 		(void) snprintf(get_sum_line(), MAXLINE,
111 		    "IP truncated: header missing %d bytes", -fraglen);
112 		encap_levels--;
113 		return (fraglen + iplen);
114 	}
115 	/*
116 	 * We flag this as a fragment if the more fragments bit is set, or
117 	 * if the fragment offset is non-zero.
118 	 */
119 	morefrag = (ntohs(ip->ip_off) & IP_MF) == 0 ? B_FALSE : B_TRUE;
120 	fragoffset = (ntohs(ip->ip_off) & 0x1FFF) * 8;
121 	if (morefrag || fragoffset != 0)
122 		isfrag = B_TRUE;
123 
124 	src_name = addrtoname(AF_INET, &ip->ip_src);
125 	dst_name = addrtoname(AF_INET, &ip->ip_dst);
126 
127 	if (flags & F_SUM) {
128 		if (isfrag) {
129 			(void) snprintf(get_sum_line(), MAXLINE,
130 			    "%s IP fragment ID=%d Offset=%-4d MF=%d TOS=0x%x "
131 			    "TTL=%d",
132 			    getproto(ip->ip_p),
133 			    ntohs(ip->ip_id),
134 			    fragoffset,
135 			    morefrag,
136 			    ip->ip_tos,
137 			    ip->ip_ttl);
138 		} else {
139 			(void) strlcpy(buff, inet_ntoa(ip->ip_dst),
140 			    sizeof (buff));
141 			uitmp = ntohs(ip->ip_len);
142 			(void) snprintf(get_sum_line(), MAXLINE,
143 			    "IP  D=%s S=%s LEN=%u%s, ID=%d, TOS=0x%x, TTL=%d",
144 			    buff,
145 			    inet_ntoa(ip->ip_src),
146 			    uitmp,
147 			    iplen > fraglen ? "?" : "",
148 			    ntohs(ip->ip_id),
149 			    ip->ip_tos,
150 			    ip->ip_ttl);
151 		}
152 	}
153 
154 	if (flags & F_DTAIL) {
155 		show_header("IP:   ", "IP Header", iplen);
156 		show_space();
157 		(void) snprintf(get_line(0, 0), get_line_remain(),
158 		    "Version = %d", ip->ip_v);
159 		(void) snprintf(get_line(0, 0), get_line_remain(),
160 		    "Header length = %d bytes", hdrlen);
161 		(void) snprintf(get_line(0, 0), get_line_remain(),
162 		    "Type of service = 0x%02x", ip->ip_tos);
163 		(void) snprintf(get_line(0, 0), get_line_remain(),
164 		    "      xxx. .... = %d (precedence)",
165 		    ip->ip_tos >> 5);
166 		(void) snprintf(get_line(0, 0), get_line_remain(),
167 		    "      %s", getflag(ip->ip_tos, IPTOS_LOWDELAY,
168 		    "low delay", "normal delay"));
169 		(void) snprintf(get_line(0, 0), get_line_remain(), "      %s",
170 		    getflag(ip->ip_tos, IPTOS_THROUGHPUT,
171 		    "high throughput", "normal throughput"));
172 		(void) snprintf(get_line(0, 0), get_line_remain(), "      %s",
173 		    getflag(ip->ip_tos, IPTOS_RELIABILITY,
174 		    "high reliability", "normal reliability"));
175 		(void) snprintf(get_line(0, 0), get_line_remain(), "      %s",
176 		    getflag(ip->ip_tos, IPTOS_ECT,
177 		    "ECN capable transport", "not ECN capable transport"));
178 		(void) snprintf(get_line(0, 0), get_line_remain(), "      %s",
179 		    getflag(ip->ip_tos, IPTOS_CE,
180 		    "ECN congestion experienced",
181 		    "no ECN congestion experienced"));
182 		/* warning: ip_len is signed in netinet/ip.h */
183 		uitmp = ntohs(ip->ip_len);
184 		(void) snprintf(get_line(0, 0), get_line_remain(),
185 		    "Total length = %u bytes%s", uitmp,
186 		    iplen > fraglen ? " -- truncated" : "");
187 		(void) snprintf(get_line(0, 0), get_line_remain(),
188 		    "Identification = %d", ntohs(ip->ip_id));
189 		/* warning: ip_off is signed in netinet/ip.h */
190 		uitmp = ntohs(ip->ip_off);
191 		(void) snprintf(get_line(0, 0), get_line_remain(),
192 		    "Flags = 0x%x", uitmp >> 12);
193 		(void) snprintf(get_line(0, 0), get_line_remain(), "      %s",
194 		    getflag(uitmp >> 8, IP_DF >> 8,
195 		    "do not fragment", "may fragment"));
196 		(void) snprintf(get_line(0, 0), get_line_remain(), "      %s",
197 		    getflag(uitmp >> 8, IP_MF >> 8,
198 		    "more fragments", "last fragment"));
199 		(void) snprintf(get_line(0, 0), get_line_remain(),
200 		    "Fragment offset = %u bytes",
201 		    fragoffset);
202 		(void) snprintf(get_line(0, 0), get_line_remain(),
203 		    "Time to live = %d seconds/hops",
204 		    ip->ip_ttl);
205 		(void) snprintf(get_line(0, 0), get_line_remain(),
206 		    "Protocol = %d (%s)", ip->ip_p,
207 		    getproto(ip->ip_p));
208 		/*
209 		 * XXX need to compute checksum and print whether it's correct
210 		 */
211 		(void) snprintf(get_line(0, 0), get_line_remain(),
212 		    "Header checksum = %04x",
213 		    ntohs(ip->ip_sum));
214 		(void) snprintf(get_line(0, 0), get_line_remain(),
215 		    "Source address = %s, %s",
216 		    inet_ntoa(ip->ip_src), addrtoname(AF_INET, &ip->ip_src));
217 		(void) snprintf(get_line(0, 0), get_line_remain(),
218 		    "Destination address = %s, %s",
219 		    inet_ntoa(ip->ip_dst), addrtoname(AF_INET, &ip->ip_dst));
220 
221 		/* Print IP options - if any */
222 
223 		print_ipoptions((const uchar_t *)(ip + 1),
224 		    hdrlen - sizeof (struct ip));
225 		show_space();
226 	}
227 
228 	/*
229 	 * If we are in detail mode, and this is not the first fragment of
230 	 * a fragmented packet, print out a little line stating this.
231 	 * Otherwise, go to the next protocol layer only if this is not a
232 	 * fragment, or we are in detail mode and this is the first fragment
233 	 * of a fragmented packet.
234 	 */
235 	if (flags & F_DTAIL && fragoffset != 0) {
236 		(void) snprintf(get_detail_line(0, 0), MAXLINE,
237 		    "%s:  [%d byte(s) of data, continuation of IP ident=%d]",
238 		    getproto(ip->ip_p),
239 		    iplen,
240 		    ntohs(ip->ip_id));
241 	} else if (!isfrag || (flags & F_DTAIL) && isfrag && fragoffset == 0) {
242 		/* go to the next protocol layer */
243 
244 		if (fraglen > 0) {
245 			switch (ip->ip_p) {
246 			case IPPROTO_IP:
247 				break;
248 			case IPPROTO_ENCAP:
249 				(void) interpret_ip(flags,
250 				    /* LINTED: alignment */
251 				    (const struct ip *)data, fraglen);
252 				break;
253 			case IPPROTO_ICMP:
254 				(void) interpret_icmp(flags,
255 				    /* LINTED: alignment */
256 				    (struct icmp *)data, iplen, fraglen);
257 				break;
258 			case IPPROTO_IGMP:
259 				interpret_igmp(flags, data, iplen, fraglen);
260 				break;
261 			case IPPROTO_GGP:
262 				break;
263 			case IPPROTO_TCP:
264 				(void) interpret_tcp(flags,
265 				    (struct tcphdr *)data, iplen, fraglen);
266 				break;
267 
268 			case IPPROTO_ESP:
269 				(void) interpret_esp(flags, data, iplen,
270 				    fraglen);
271 				break;
272 			case IPPROTO_AH:
273 				(void) interpret_ah(flags, data, iplen,
274 				    fraglen);
275 				break;
276 
277 			case IPPROTO_OSPF:
278 				interpret_ospf(flags, data, iplen, fraglen);
279 				break;
280 
281 			case IPPROTO_EGP:
282 			case IPPROTO_PUP:
283 				break;
284 			case IPPROTO_UDP:
285 				(void) interpret_udp(flags,
286 				    (struct udphdr *)data, iplen, fraglen);
287 				break;
288 
289 			case IPPROTO_IDP:
290 			case IPPROTO_HELLO:
291 			case IPPROTO_ND:
292 			case IPPROTO_RAW:
293 				break;
294 			case IPPROTO_IPV6:	/* IPV6 encap */
295 				/* LINTED: alignment */
296 				(void) interpret_ipv6(flags, (ip6_t *)data,
297 				    iplen);
298 				break;
299 			case IPPROTO_SCTP:
300 				(void) interpret_sctp(flags,
301 				    (struct sctp_hdr *)data, iplen, fraglen);
302 				break;
303 			}
304 		}
305 	}
306 
307 	encap_levels--;
308 	return (iplen);
309 }
310 
311 int
interpret_ipv6(int flags,const ip6_t * ip6h,int fraglen)312 interpret_ipv6(int flags, const ip6_t *ip6h, int fraglen)
313 {
314 	uint8_t *data;
315 	int hdrlen, iplen;
316 	int version, flow, class;
317 	uchar_t proto;
318 	boolean_t isfrag = B_FALSE;
319 	uint8_t extmask;
320 	/*
321 	 * The print_srcname and print_dstname strings are the hostname
322 	 * parts of the verbose IPv6 header output, including the comma
323 	 * and the space after the litteral address strings.
324 	 */
325 	char print_srcname[MAXHOSTNAMELEN + 2];
326 	char print_dstname[MAXHOSTNAMELEN + 2];
327 	char src_addrstr[INET6_ADDRSTRLEN];
328 	char dst_addrstr[INET6_ADDRSTRLEN];
329 
330 	iplen = ntohs(ip6h->ip6_plen);
331 	hdrlen = IPV6_HDR_LEN;
332 	fraglen -= hdrlen;
333 	if (fraglen < 0)
334 		return (fraglen + hdrlen);
335 	data = ((uint8_t *)ip6h) + hdrlen;
336 
337 	proto = ip6h->ip6_nxt;
338 
339 	src_name = addrtoname(AF_INET6, &ip6h->ip6_src);
340 	dst_name = addrtoname(AF_INET6, &ip6h->ip6_dst);
341 
342 	/*
343 	 * Use endian-aware masks to extract traffic class and
344 	 * flowinfo.  Also, flowinfo is now 20 bits and class 8
345 	 * rather than 24 and 4.
346 	 */
347 	class = ntohl((ip6h->ip6_vcf & IPV6_FLOWINFO_TCLASS) >> 20);
348 	flow = ntohl(ip6h->ip6_vcf & IPV6_FLOWINFO_FLOWLABEL);
349 
350 	/*
351 	 * NOTE: the F_SUM and F_DTAIL flags are mutually exclusive,
352 	 * so the code within the first part of the following if statement
353 	 * will not affect the detailed printing of the packet.
354 	 */
355 	if (flags & F_SUM) {
356 		(void) snprintf(get_sum_line(), MAXLINE,
357 		    "IPv6  S=%s D=%s LEN=%d HOPS=%d CLASS=0x%x FLOW=0x%x",
358 		    src_name, dst_name, iplen, ip6h->ip6_hops, class, flow);
359 	} else if (flags & F_DTAIL) {
360 
361 		(void) inet_ntop(AF_INET6, &ip6h->ip6_src, src_addrstr,
362 		    INET6_ADDRSTRLEN);
363 		(void) inet_ntop(AF_INET6, &ip6h->ip6_dst, dst_addrstr,
364 		    INET6_ADDRSTRLEN);
365 
366 		version = ntohl(ip6h->ip6_vcf) >> 28;
367 
368 		if (strcmp(src_name, src_addrstr) == 0) {
369 			print_srcname[0] = '\0';
370 		} else {
371 			snprintf(print_srcname, sizeof (print_srcname),
372 			    ", %s", src_name);
373 		}
374 
375 		if (strcmp(dst_name, dst_addrstr) == 0) {
376 			print_dstname[0] = '\0';
377 		} else {
378 			snprintf(print_dstname, sizeof (print_dstname),
379 			    ", %s", dst_name);
380 		}
381 
382 		show_header("IPv6:   ", "IPv6 Header", iplen);
383 		show_space();
384 
385 		(void) snprintf(get_line(0, 0), get_line_remain(),
386 		    "Version = %d", version);
387 		(void) snprintf(get_line(0, 0), get_line_remain(),
388 		    "Traffic Class = %d", class);
389 		(void) snprintf(get_line(0, 0), get_line_remain(),
390 		    "Flow label = 0x%x", flow);
391 		(void) snprintf(get_line(0, 0), get_line_remain(),
392 		    "Payload length = %d", iplen);
393 		(void) snprintf(get_line(0, 0), get_line_remain(),
394 		    "Next Header = %d (%s)", proto,
395 		    getproto(proto));
396 		(void) snprintf(get_line(0, 0), get_line_remain(),
397 		    "Hop Limit = %d", ip6h->ip6_hops);
398 		(void) snprintf(get_line(0, 0), get_line_remain(),
399 		    "Source address = %s%s", src_addrstr, print_srcname);
400 		(void) snprintf(get_line(0, 0), get_line_remain(),
401 		    "Destination address = %s%s", dst_addrstr, print_dstname);
402 
403 		show_space();
404 	}
405 
406 	/*
407 	 * Print IPv6 Extension Headers, or skip them in the summary case.
408 	 * Set isfrag to true if one of the extension headers encounterred
409 	 * was a fragment header.
410 	 */
411 	if (proto == IPPROTO_HOPOPTS || proto == IPPROTO_DSTOPTS ||
412 	    proto == IPPROTO_ROUTING || proto == IPPROTO_FRAGMENT) {
413 		extmask = print_ipv6_extensions(flags, &data, &proto, &iplen,
414 		    &fraglen);
415 		if ((extmask & SNOOP_FRAGMENT) != 0) {
416 			isfrag = B_TRUE;
417 		}
418 	}
419 
420 	/*
421 	 * We only want to print upper layer information if this is not
422 	 * a fragment, or if we're printing in detail.  Note that the
423 	 * proto variable will be set to IPPROTO_NONE if this is a fragment
424 	 * with a non-zero fragment offset.
425 	 */
426 	if (!isfrag || flags & F_DTAIL) {
427 		/* go to the next protocol layer */
428 
429 		switch (proto) {
430 		case IPPROTO_IP:
431 			break;
432 		case IPPROTO_ENCAP:
433 			/* LINTED: alignment */
434 			(void) interpret_ip(flags, (const struct ip *)data,
435 			    fraglen);
436 			break;
437 		case IPPROTO_ICMPV6:
438 			/* LINTED: alignment */
439 			(void) interpret_icmpv6(flags, (icmp6_t *)data, iplen,
440 			    fraglen);
441 			break;
442 		case IPPROTO_IGMP:
443 			interpret_igmp(flags, data, iplen, fraglen);
444 			break;
445 		case IPPROTO_GGP:
446 			break;
447 		case IPPROTO_TCP:
448 			(void) interpret_tcp(flags, (struct tcphdr *)data,
449 			    iplen, fraglen);
450 			break;
451 		case IPPROTO_ESP:
452 			(void) interpret_esp(flags, data, iplen, fraglen);
453 			break;
454 		case IPPROTO_AH:
455 			(void) interpret_ah(flags, data, iplen, fraglen);
456 			break;
457 		case IPPROTO_EGP:
458 		case IPPROTO_PUP:
459 			break;
460 		case IPPROTO_UDP:
461 			(void) interpret_udp(flags, (struct udphdr *)data,
462 			    iplen, fraglen);
463 			break;
464 		case IPPROTO_IDP:
465 		case IPPROTO_HELLO:
466 		case IPPROTO_ND:
467 		case IPPROTO_RAW:
468 			break;
469 		case IPPROTO_IPV6:
470 			/* LINTED: alignment */
471 			(void) interpret_ipv6(flags, (const ip6_t *)data,
472 			    iplen);
473 			break;
474 		case IPPROTO_SCTP:
475 			(void) interpret_sctp(flags, (struct sctp_hdr *)data,
476 			    iplen, fraglen);
477 			break;
478 		case IPPROTO_OSPF:
479 			interpret_ospf6(flags, data, iplen, fraglen);
480 			break;
481 		}
482 	}
483 
484 	return (iplen);
485 }
486 
487 /*
488  * ip_ext: data including the extension header.
489  * iplen: length of the data remaining in the packet.
490  * Returns a mask of IPv6 extension headers it processed.
491  */
492 uint8_t
print_ipv6_extensions(int flags,uint8_t ** hdr,uint8_t * next,int * iplen,int * fraglen)493 print_ipv6_extensions(int flags, uint8_t **hdr, uint8_t *next, int *iplen,
494     int *fraglen)
495 {
496 	uint8_t *data_ptr;
497 	uchar_t proto = *next;
498 	boolean_t is_extension_header;
499 	struct ip6_hbh *ipv6ext_hbh;
500 	struct ip6_dest *ipv6ext_dest;
501 	struct ip6_rthdr *ipv6ext_rthdr;
502 	struct ip6_frag *ipv6ext_frag;
503 	uint32_t exthdrlen;
504 	uint8_t extmask = 0;
505 
506 	if ((hdr == NULL) || (*hdr == NULL) || (next == NULL) || (iplen == 0))
507 		return (0);
508 
509 	data_ptr = *hdr;
510 	is_extension_header = B_TRUE;
511 	while (is_extension_header) {
512 
513 		/*
514 		 * There must be at least enough data left to read the
515 		 * next header and header length fields from the next
516 		 * header.
517 		 */
518 		if (*fraglen < 2) {
519 			return (extmask);
520 		}
521 
522 		switch (proto) {
523 		case IPPROTO_HOPOPTS:
524 			ipv6ext_hbh = (struct ip6_hbh *)data_ptr;
525 			exthdrlen = 8 + ipv6ext_hbh->ip6h_len * 8;
526 			if (*fraglen <= exthdrlen) {
527 				return (extmask);
528 			}
529 			prt_hbh_options(flags, ipv6ext_hbh);
530 			extmask |= SNOOP_HOPOPTS;
531 			proto = ipv6ext_hbh->ip6h_nxt;
532 			break;
533 		case IPPROTO_DSTOPTS:
534 			ipv6ext_dest = (struct ip6_dest *)data_ptr;
535 			exthdrlen = 8 + ipv6ext_dest->ip6d_len * 8;
536 			if (*fraglen <= exthdrlen) {
537 				return (extmask);
538 			}
539 			prt_dest_options(flags, ipv6ext_dest);
540 			extmask |= SNOOP_DSTOPTS;
541 			proto = ipv6ext_dest->ip6d_nxt;
542 			break;
543 		case IPPROTO_ROUTING:
544 			ipv6ext_rthdr = (struct ip6_rthdr *)data_ptr;
545 			exthdrlen = 8 + ipv6ext_rthdr->ip6r_len * 8;
546 			if (*fraglen <= exthdrlen) {
547 				return (extmask);
548 			}
549 			prt_routing_hdr(flags, ipv6ext_rthdr);
550 			extmask |= SNOOP_ROUTING;
551 			proto = ipv6ext_rthdr->ip6r_nxt;
552 			break;
553 		case IPPROTO_FRAGMENT:
554 			/* LINTED: alignment */
555 			ipv6ext_frag = (struct ip6_frag *)data_ptr;
556 			exthdrlen = sizeof (struct ip6_frag);
557 			if (*fraglen <= exthdrlen) {
558 				return (extmask);
559 			}
560 			prt_fragment_hdr(flags, ipv6ext_frag);
561 			extmask |= SNOOP_FRAGMENT;
562 			/*
563 			 * If this is not the first fragment, forget about
564 			 * the rest of the packet, snoop decoding is
565 			 * stateless.
566 			 */
567 			if ((ipv6ext_frag->ip6f_offlg & IP6F_OFF_MASK) != 0)
568 				proto = IPPROTO_NONE;
569 			else
570 				proto = ipv6ext_frag->ip6f_nxt;
571 			break;
572 		default:
573 			is_extension_header = B_FALSE;
574 			break;
575 		}
576 
577 		if (is_extension_header) {
578 			*iplen -= exthdrlen;
579 			*fraglen -= exthdrlen;
580 			data_ptr += exthdrlen;
581 		}
582 	}
583 
584 	*next = proto;
585 	*hdr = data_ptr;
586 	return (extmask);
587 }
588 
589 static void
print_ipoptions(const uchar_t * opt,int optlen)590 print_ipoptions(const uchar_t *opt, int optlen)
591 {
592 	int len;
593 	int remain;
594 	char *line;
595 	const char *truncstr;
596 
597 	if (optlen <= 0) {
598 		(void) snprintf(get_line(0, 0), get_line_remain(),
599 		    "No options");
600 		return;
601 	}
602 
603 	(void) snprintf(get_line(0, 0), get_line_remain(),
604 	    "Options: (%d bytes)", optlen);
605 
606 	while (optlen > 0) {
607 		line = get_line(0, 0);
608 		remain = get_line_remain();
609 		len = opt[1];
610 		truncstr = len > optlen ? "?" : "";
611 		switch (opt[0]) {
612 		case IPOPT_EOL:
613 			(void) strlcpy(line, "  - End of option list", remain);
614 			return;
615 		case IPOPT_NOP:
616 			(void) strlcpy(line, "  - No op", remain);
617 			len = 1;
618 			break;
619 		case IPOPT_RR:
620 			(void) snprintf(line, remain,
621 			    "  - Record route (%d bytes%s)", len, truncstr);
622 			print_route(opt);
623 			break;
624 		case IPOPT_TS:
625 			(void) snprintf(line, remain,
626 			    "  - Time stamp (%d bytes%s)", len, truncstr);
627 			break;
628 		case IPOPT_SECURITY:
629 			(void) snprintf(line, remain, "  - RIPSO (%d bytes%s)",
630 			    len, truncstr);
631 			print_ripso(opt);
632 			break;
633 		case IPOPT_COMSEC:
634 			(void) snprintf(line, remain, "  - CIPSO (%d bytes%s)",
635 			    len, truncstr);
636 			print_cipso(opt);
637 			break;
638 		case IPOPT_LSRR:
639 			(void) snprintf(line, remain,
640 			    "  - Loose source route (%d bytes%s)", len,
641 			    truncstr);
642 			print_route(opt);
643 			break;
644 		case IPOPT_SATID:
645 			(void) snprintf(line, remain,
646 			    "  - SATNET Stream id (%d bytes%s)",
647 			    len, truncstr);
648 			break;
649 		case IPOPT_SSRR:
650 			(void) snprintf(line, remain,
651 			    "  - Strict source route, (%d bytes%s)", len,
652 			    truncstr);
653 			print_route(opt);
654 			break;
655 		default:
656 			(void) snprintf(line, remain,
657 			    "  - Option %d (unknown - %d bytes%s) %s",
658 			    opt[0], len, truncstr,
659 			    tohex((char *)&opt[2], len - 2));
660 			break;
661 		}
662 		if (len <= 0) {
663 			(void) snprintf(line, remain,
664 			    "  - Incomplete option len %d", len);
665 			break;
666 		}
667 		opt += len;
668 		optlen -= len;
669 	}
670 }
671 
672 static void
print_route(const uchar_t * opt)673 print_route(const uchar_t *opt)
674 {
675 	int len, pointer, remain;
676 	struct in_addr addr;
677 	char *line;
678 
679 	len = opt[1];
680 	pointer = opt[2];
681 
682 	(void) snprintf(get_line(0, 0), get_line_remain(),
683 	    "    Pointer = %d", pointer);
684 
685 	pointer -= IPOPT_MINOFF;
686 	opt += (IPOPT_OFFSET + 1);
687 	len -= (IPOPT_OFFSET + 1);
688 
689 	while (len > 0) {
690 		line = get_line(0, 0);
691 		remain = get_line_remain();
692 		memcpy((char *)&addr, opt, sizeof (addr));
693 		if (addr.s_addr == INADDR_ANY)
694 			(void) strlcpy(line, "      -", remain);
695 		else
696 			(void) snprintf(line, remain, "      %s",
697 			    addrtoname(AF_INET, &addr));
698 		if (pointer == 0)
699 			(void) strlcat(line, "  <-- (current)", remain);
700 
701 		opt += sizeof (addr);
702 		len -= sizeof (addr);
703 		pointer -= sizeof (addr);
704 	}
705 }
706 
707 char *
getproto(int p)708 getproto(int p)
709 {
710 	switch (p) {
711 	case IPPROTO_HOPOPTS:	return ("IPv6-HopOpts");
712 	case IPPROTO_IPV6:	return ("IPv6");
713 	case IPPROTO_ROUTING:	return ("IPv6-Route");
714 	case IPPROTO_FRAGMENT:	return ("IPv6-Frag");
715 	case IPPROTO_RSVP:	return ("RSVP");
716 	case IPPROTO_ENCAP:	return ("IP-in-IP");
717 	case IPPROTO_AH:	return ("AH");
718 	case IPPROTO_ESP:	return ("ESP");
719 	case IPPROTO_ICMP:	return ("ICMP");
720 	case IPPROTO_ICMPV6:	return ("ICMPv6");
721 	case IPPROTO_DSTOPTS:	return ("IPv6-DstOpts");
722 	case IPPROTO_IGMP:	return ("IGMP");
723 	case IPPROTO_GGP:	return ("GGP");
724 	case IPPROTO_TCP:	return ("TCP");
725 	case IPPROTO_EGP:	return ("EGP");
726 	case IPPROTO_PUP:	return ("PUP");
727 	case IPPROTO_UDP:	return ("UDP");
728 	case IPPROTO_IDP:	return ("IDP");
729 	case IPPROTO_HELLO:	return ("HELLO");
730 	case IPPROTO_ND:	return ("ND");
731 	case IPPROTO_EON:	return ("EON");
732 	case IPPROTO_RAW:	return ("RAW");
733 	case IPPROTO_OSPF:	return ("OSPF");
734 	default:		return ("");
735 	}
736 }
737 
738 static void
prt_routing_hdr(int flags,const struct ip6_rthdr * ipv6ext_rthdr)739 prt_routing_hdr(int flags, const struct ip6_rthdr *ipv6ext_rthdr)
740 {
741 	uint8_t nxt_hdr;
742 	uint8_t type;
743 	uint32_t len;
744 	uint8_t segleft;
745 	uint32_t numaddrs;
746 	int i;
747 	struct ip6_rthdr0 *ipv6ext_rthdr0;
748 	struct in6_addr *addrs;
749 	char addr[INET6_ADDRSTRLEN];
750 
751 	/* in summary mode, we don't do anything. */
752 	if (flags & F_SUM) {
753 		return;
754 	}
755 
756 	nxt_hdr = ipv6ext_rthdr->ip6r_nxt;
757 	type = ipv6ext_rthdr->ip6r_type;
758 	len = 8 * (ipv6ext_rthdr->ip6r_len + 1);
759 	segleft = ipv6ext_rthdr->ip6r_segleft;
760 
761 	show_header("IPv6-Route:  ", "IPv6 Routing Header", 0);
762 	show_space();
763 
764 	(void) snprintf(get_line(0, 0), get_line_remain(),
765 	    "Next header = %d (%s)", nxt_hdr, getproto(nxt_hdr));
766 	(void) snprintf(get_line(0, 0), get_line_remain(),
767 	    "Header length = %d", len);
768 	(void) snprintf(get_line(0, 0), get_line_remain(),
769 	    "Routing type = %d", type);
770 	(void) snprintf(get_line(0, 0), get_line_remain(),
771 	    "Segments left = %d", segleft);
772 
773 	if (type == IPV6_RTHDR_TYPE_0) {
774 		/*
775 		 * XXX This loop will print all addresses in the routing header,
776 		 * XXX not just the segments left.
777 		 * XXX (The header length field is twice the number of
778 		 * XXX addresses)
779 		 * XXX At some future time, we may want to change this
780 		 * XXX to differentiate between the hops yet to do
781 		 * XXX and the hops already taken.
782 		 */
783 		/* LINTED: alignment */
784 		ipv6ext_rthdr0 = (struct ip6_rthdr0 *)ipv6ext_rthdr;
785 		numaddrs = ipv6ext_rthdr0->ip6r0_len / 2;
786 		addrs = (struct in6_addr *)(ipv6ext_rthdr0 + 1);
787 		for (i = 0; i < numaddrs; i++) {
788 			(void) inet_ntop(AF_INET6, &addrs[i], addr,
789 			    INET6_ADDRSTRLEN);
790 			(void) snprintf(get_line(0, 0), get_line_remain(),
791 			    "address[%d]=%s", i, addr);
792 		}
793 	}
794 
795 	show_space();
796 }
797 
798 static void
prt_fragment_hdr(int flags,const struct ip6_frag * ipv6ext_frag)799 prt_fragment_hdr(int flags, const struct ip6_frag *ipv6ext_frag)
800 {
801 	boolean_t morefrag;
802 	uint16_t fragoffset;
803 	uint8_t nxt_hdr;
804 	uint32_t fragident;
805 
806 	/* extract the various fields from the fragment header */
807 	nxt_hdr = ipv6ext_frag->ip6f_nxt;
808 	morefrag = (ipv6ext_frag->ip6f_offlg & IP6F_MORE_FRAG) == 0
809 	    ? B_FALSE : B_TRUE;
810 	fragoffset = ntohs(ipv6ext_frag->ip6f_offlg & IP6F_OFF_MASK);
811 	fragident = ntohl(ipv6ext_frag->ip6f_ident);
812 
813 	if (flags & F_SUM) {
814 		(void) snprintf(get_sum_line(), MAXLINE,
815 		    "IPv6 fragment ID=%u Offset=%-4d MF=%d",
816 		    fragident,
817 		    fragoffset,
818 		    morefrag);
819 	} else { /* F_DTAIL */
820 		show_header("IPv6-Frag:  ", "IPv6 Fragment Header", 0);
821 		show_space();
822 
823 		(void) snprintf(get_line(0, 0), get_line_remain(),
824 		    "Next Header = %d (%s)", nxt_hdr, getproto(nxt_hdr));
825 		(void) snprintf(get_line(0, 0), get_line_remain(),
826 		    "Fragment Offset = %d", fragoffset);
827 		(void) snprintf(get_line(0, 0), get_line_remain(),
828 		    "More Fragments Flag = %s", morefrag ? "true" : "false");
829 		(void) snprintf(get_line(0, 0), get_line_remain(),
830 		    "Identification = %u", fragident);
831 
832 		show_space();
833 	}
834 }
835 
836 static void
print_ip6opt_ls(const uchar_t * data,unsigned int op_len)837 print_ip6opt_ls(const uchar_t *data, unsigned int op_len)
838 {
839 	uint32_t doi;
840 	uint8_t sotype, solen;
841 	uint16_t value, value2;
842 	char *cp;
843 	int remlen;
844 	boolean_t printed;
845 
846 	(void) snprintf(get_line(0, 0), get_line_remain(),
847 	    "Labeled Security Option len = %u bytes%s", op_len,
848 	    op_len < sizeof (uint32_t) || (op_len & 1) != 0 ? "?" : "");
849 	if (op_len < sizeof (uint32_t))
850 		return;
851 	GETINT32(doi, data);
852 	(void) snprintf(get_line(0, 0), get_line_remain(),
853 	    "    DOI = %d (%s)", doi, doi == IP6LS_DOI_V4 ? "IPv4" : "???");
854 	op_len -= sizeof (uint32_t);
855 	while (op_len > 0) {
856 		GETINT8(sotype, data);
857 		if (op_len < 2) {
858 			(void) snprintf(get_line(0, 0), get_line_remain(),
859 			    "    truncated %u suboption (no len)", sotype);
860 			break;
861 		}
862 		GETINT8(solen, data);
863 		if (solen < 2 || solen > op_len) {
864 			(void) snprintf(get_line(0, 0), get_line_remain(),
865 			    "    bad %u suboption (len 2 <= %u <= %u)",
866 			    sotype, solen, op_len);
867 			if (solen < 2)
868 				solen = 2;
869 			if (solen > op_len)
870 				solen = op_len;
871 		}
872 		op_len -= solen;
873 		solen -= 2;
874 		cp = get_line(0, 0);
875 		remlen = get_line_remain();
876 		(void) strlcpy(cp, "    ", remlen);
877 		cp += 4;
878 		remlen -= 4;
879 		printed = B_TRUE;
880 		switch (sotype) {
881 		case IP6LS_TT_LEVEL:
882 			if (solen != 2) {
883 				printed = B_FALSE;
884 				break;
885 			}
886 			GETINT16(value, data);
887 			(void) snprintf(cp, remlen, "Level %u", value);
888 			solen = 0;
889 			break;
890 		case IP6LS_TT_VECTOR:
891 			(void) strlcpy(cp, "Bit-Vector: ", remlen);
892 			remlen -= strlen(cp);
893 			cp += strlen(cp);
894 			while (solen > 1) {
895 				GETINT16(value, data);
896 				solen -= 2;
897 				(void) snprintf(cp, remlen, "%04x", value);
898 				remlen -= strlen(cp);
899 				cp += strlen(cp);
900 			}
901 			break;
902 		case IP6LS_TT_ENUM:
903 			(void) strlcpy(cp, "Enumeration:", remlen);
904 			remlen -= strlen(cp);
905 			cp += strlen(cp);
906 			while (solen > 1) {
907 				GETINT16(value, data);
908 				solen -= 2;
909 				(void) snprintf(cp, remlen, " %u", value);
910 				remlen -= strlen(cp);
911 				cp += strlen(cp);
912 			}
913 			break;
914 		case IP6LS_TT_RANGES:
915 			(void) strlcpy(cp, "Ranges:", remlen);
916 			remlen -= strlen(cp);
917 			cp += strlen(cp);
918 			while (solen > 3) {
919 				GETINT16(value, data);
920 				GETINT16(value2, data);
921 				solen -= 4;
922 				(void) snprintf(cp, remlen, " %u-%u", value,
923 				    value2);
924 				remlen -= strlen(cp);
925 				cp += strlen(cp);
926 			}
927 			break;
928 		case IP6LS_TT_V4:
929 			(void) strlcpy(cp, "IPv4 Option", remlen);
930 			print_ipoptions(data, solen);
931 			solen = 0;
932 			break;
933 		case IP6LS_TT_DEST:
934 			(void) snprintf(cp, remlen,
935 			    "Destination-Only Data length %u", solen);
936 			solen = 0;
937 			break;
938 		default:
939 			(void) snprintf(cp, remlen,
940 			    "    unknown %u suboption (len %u)", sotype, solen);
941 			solen = 0;
942 			break;
943 		}
944 		if (solen != 0) {
945 			if (printed) {
946 				cp = get_line(0, 0);
947 				remlen = get_line_remain();
948 			}
949 			(void) snprintf(cp, remlen,
950 			    "    malformed %u suboption (remaining %u)",
951 			    sotype, solen);
952 			data += solen;
953 		}
954 	}
955 }
956 
957 static void
prt_hbh_options(int flags,const struct ip6_hbh * ipv6ext_hbh)958 prt_hbh_options(int flags, const struct ip6_hbh *ipv6ext_hbh)
959 {
960 	const uint8_t *data, *ndata;
961 	uint32_t len;
962 	uint8_t op_type;
963 	uint8_t op_len;
964 	uint8_t nxt_hdr;
965 
966 	/* in summary mode, we don't do anything. */
967 	if (flags & F_SUM) {
968 		return;
969 	}
970 
971 	show_header("IPv6-HopOpts:  ", "IPv6 Hop-by-Hop Options Header", 0);
972 	show_space();
973 
974 	/*
975 	 * Store the lengh of this ext hdr in bytes.  The caller has
976 	 * ensured that there is at least len bytes of data left.
977 	 */
978 	len = ipv6ext_hbh->ip6h_len * 8 + 8;
979 
980 	ndata = (const uint8_t *)ipv6ext_hbh + 2;
981 	len -= 2;
982 
983 	nxt_hdr = ipv6ext_hbh->ip6h_nxt;
984 	(void) snprintf(get_line(0, 0), get_line_remain(),
985 	    "Next Header = %u (%s)", nxt_hdr, getproto(nxt_hdr));
986 
987 	while (len > 0) {
988 		data = ndata;
989 		GETINT8(op_type, data);
990 		/* This is the only one-octet IPv6 option */
991 		if (op_type == IP6OPT_PAD1) {
992 			(void) snprintf(get_line(0, 0), get_line_remain(),
993 			    "pad1 option ");
994 			len--;
995 			ndata = data;
996 			continue;
997 		}
998 		GETINT8(op_len, data);
999 		if (len < 2 || op_len + 2 > len) {
1000 			(void) snprintf(get_line(0, 0), get_line_remain(),
1001 			    "Error: option %u truncated (%u + 2 > %u)",
1002 			    op_type, op_len, len);
1003 			op_len = len - 2;
1004 			/*
1005 			 * Continue processing the malformed option so that we
1006 			 * can display as much as possible.
1007 			 */
1008 		}
1009 
1010 		/* advance pointers to the next option */
1011 		len -= op_len + 2;
1012 		ndata = data + op_len;
1013 
1014 		/* process this option */
1015 		switch (op_type) {
1016 		case IP6OPT_PADN:
1017 			(void) snprintf(get_line(0, 0), get_line_remain(),
1018 			    "padN option len = %u", op_len);
1019 			break;
1020 		case IP6OPT_JUMBO: {
1021 			uint32_t payload_len;
1022 
1023 			(void) snprintf(get_line(0, 0), get_line_remain(),
1024 			    "Jumbo Payload Option len = %u bytes%s", op_len,
1025 			    op_len == sizeof (uint32_t) ? "" : "?");
1026 			if (op_len == sizeof (uint32_t)) {
1027 				GETINT32(payload_len, data);
1028 				(void) snprintf(get_line(0, 0),
1029 				    get_line_remain(),
1030 				    "Jumbo Payload Length = %u bytes",
1031 				    payload_len);
1032 			}
1033 			break;
1034 		}
1035 		case IP6OPT_ROUTER_ALERT: {
1036 			uint16_t value;
1037 			const char *label[] = {"MLD", "RSVP", "AN"};
1038 
1039 			(void) snprintf(get_line(0, 0), get_line_remain(),
1040 			    "Router Alert Option len = %u bytes%s", op_len,
1041 			    op_len == sizeof (uint16_t) ? "" : "?");
1042 			if (op_len == sizeof (uint16_t)) {
1043 				GETINT16(value, data);
1044 				(void) snprintf(get_line(0, 0),
1045 				    get_line_remain(),
1046 				    "Alert Type = %d (%s)", value,
1047 				    value < sizeof (label) / sizeof (label[0]) ?
1048 				    label[value] : "???");
1049 			}
1050 			break;
1051 		}
1052 		case IP6OPT_LS:
1053 			print_ip6opt_ls(data, op_len);
1054 			break;
1055 		default:
1056 			(void) snprintf(get_line(0, 0), get_line_remain(),
1057 			    "Option type = %u, len = %u", op_type, op_len);
1058 			break;
1059 		}
1060 	}
1061 
1062 	show_space();
1063 }
1064 
1065 static void
prt_dest_options(int flags,const struct ip6_dest * ipv6ext_dest)1066 prt_dest_options(int flags, const struct ip6_dest *ipv6ext_dest)
1067 {
1068 	const uint8_t *data, *ndata;
1069 	uint32_t len;
1070 	uint8_t op_type;
1071 	uint32_t op_len;
1072 	uint8_t nxt_hdr;
1073 	uint8_t value;
1074 
1075 	/* in summary mode, we don't do anything. */
1076 	if (flags & F_SUM) {
1077 		return;
1078 	}
1079 
1080 	show_header("IPv6-DstOpts:  ", "IPv6 Destination Options Header", 0);
1081 	show_space();
1082 
1083 	/*
1084 	 * Store the length of this ext hdr in bytes.  The caller has
1085 	 * ensured that there is at least len bytes of data left.
1086 	 */
1087 	len = ipv6ext_dest->ip6d_len * 8 + 8;
1088 
1089 	ndata = (const uint8_t *)ipv6ext_dest + 2; /* skip hdr/len */
1090 	len -= 2;
1091 
1092 	nxt_hdr = ipv6ext_dest->ip6d_nxt;
1093 	(void) snprintf(get_line(0, 0), get_line_remain(),
1094 	    "Next Header = %u (%s)", nxt_hdr, getproto(nxt_hdr));
1095 
1096 	while (len > 0) {
1097 		data = ndata;
1098 		GETINT8(op_type, data);
1099 		if (op_type == IP6OPT_PAD1) {
1100 			(void) snprintf(get_line(0, 0), get_line_remain(),
1101 			    "pad1 option ");
1102 			len--;
1103 			ndata = data;
1104 			continue;
1105 		}
1106 		GETINT8(op_len, data);
1107 		if (len < 2 || op_len + 2 > len) {
1108 			(void) snprintf(get_line(0, 0), get_line_remain(),
1109 			    "Error: option %u truncated (%u + 2 > %u)",
1110 			    op_type, op_len, len);
1111 			op_len = len - 2;
1112 			/*
1113 			 * Continue processing the malformed option so that we
1114 			 * can display as much as possible.
1115 			 */
1116 		}
1117 
1118 		/* advance pointers to the next option */
1119 		len -= op_len + 2;
1120 		ndata = data + op_len;
1121 
1122 		/* process this option */
1123 		switch (op_type) {
1124 		case IP6OPT_PADN:
1125 			(void) snprintf(get_line(0, 0), get_line_remain(),
1126 			    "padN option len = %u", op_len);
1127 			break;
1128 		case IP6OPT_TUNNEL_LIMIT:
1129 			GETINT8(value, data);
1130 			(void) snprintf(get_line(0, 0), get_line_remain(),
1131 			    "tunnel encapsulation limit len = %d, value = %d",
1132 			    op_len, value);
1133 			break;
1134 		case IP6OPT_LS:
1135 			print_ip6opt_ls(data, op_len);
1136 			break;
1137 		default:
1138 			(void) snprintf(get_line(0, 0), get_line_remain(),
1139 			    "Option type = %u, len = %u", op_type, op_len);
1140 			break;
1141 		}
1142 	}
1143 
1144 	show_space();
1145 }
1146 
1147 #define	ALABEL_MAXLEN	256
1148 
1149 static char ascii_label[ALABEL_MAXLEN];
1150 static char *plabel = ascii_label;
1151 
1152 struct snoop_pair {
1153 	int val;
1154 	const char *name;
1155 };
1156 
1157 static struct snoop_pair ripso_class_tbl[] = {
1158 	TSOL_CL_TOP_SECRET,	"TOP SECRET",
1159 	TSOL_CL_SECRET,		"SECRET",
1160 	TSOL_CL_CONFIDENTIAL,	"CONFIDENTIAL",
1161 	TSOL_CL_UNCLASSIFIED,	"UNCLASSIFIED",
1162 	-1,			NULL
1163 };
1164 
1165 static struct snoop_pair ripso_prot_tbl[] = {
1166 	TSOL_PA_GENSER,		"GENSER",
1167 	TSOL_PA_SIOP_ESI,	"SIOP-ESI",
1168 	TSOL_PA_SCI,		"SCI",
1169 	TSOL_PA_NSA,		"NSA",
1170 	TSOL_PA_DOE,		"DOE",
1171 	0x04,			"UNASSIGNED",
1172 	0x02,			"UNASSIGNED",
1173 	-1,			NULL
1174 };
1175 
1176 static struct snoop_pair *
get_pair_byval(struct snoop_pair pairlist[],int val)1177 get_pair_byval(struct snoop_pair pairlist[], int val)
1178 {
1179 	int i;
1180 
1181 	for (i = 0; pairlist[i].name != NULL; i++)
1182 		if (pairlist[i].val == val)
1183 			return (&pairlist[i]);
1184 	return (NULL);
1185 }
1186 
1187 static void
print_ripso(const uchar_t * opt)1188 print_ripso(const uchar_t *opt)
1189 {
1190 	struct snoop_pair *ripso_class;
1191 	int i, index, prot_len;
1192 	boolean_t first_prot;
1193 	char line[100], *ptr;
1194 
1195 	prot_len = opt[1] - 3;
1196 	if (prot_len < 0)
1197 		return;
1198 
1199 	show_header("RIPSO:  ", "Revised IP Security Option", 0);
1200 	show_space();
1201 
1202 	(void) snprintf(get_line(0, 0), get_line_remain(),
1203 	    "Type = Basic Security Option (%d), Length = %d", opt[0], opt[1]);
1204 
1205 	/*
1206 	 * Display Classification Level
1207 	 */
1208 	ripso_class = get_pair_byval(ripso_class_tbl, (int)opt[2]);
1209 	if (ripso_class == NULL)
1210 		(void) snprintf(get_line(0, 0), get_line_remain(),
1211 		    "Classification = Unknown (0x%02x)", opt[2]);
1212 	else
1213 		(void) snprintf(get_line(0, 0), get_line_remain(),
1214 		    "Classification = %s (0x%02x)",
1215 		    ripso_class->name, ripso_class->val);
1216 
1217 	/*
1218 	 * Display Protection Authority Flags
1219 	 */
1220 	(void) snprintf(line, sizeof (line), "Protection Authority = ");
1221 	ptr = line;
1222 	first_prot = B_TRUE;
1223 	for (i = 0; i < prot_len; i++) {
1224 		index = 0;
1225 		while (ripso_prot_tbl[index].name != NULL) {
1226 			if (opt[3 + i] & ripso_prot_tbl[index].val) {
1227 				ptr = strchr(ptr, 0);
1228 				if (!first_prot) {
1229 					(void) strlcpy(ptr, ", ",
1230 					    sizeof (line) - (ptr - line));
1231 					ptr = strchr(ptr, 0);
1232 				}
1233 				(void) snprintf(ptr,
1234 				    sizeof (line) - (ptr - line),
1235 				    "%s (0x%02x)",
1236 				    ripso_prot_tbl[index].name,
1237 				    ripso_prot_tbl[index].val);
1238 			}
1239 			index++;
1240 		}
1241 		if ((opt[3 + i] & 1) == 0)
1242 			break;
1243 	}
1244 	if (!first_prot)
1245 		(void) snprintf(get_line(0, 0), get_line_remain(), "%s", line);
1246 	else
1247 		(void) snprintf(get_line(0, 0), get_line_remain(), "%sNone",
1248 		    line);
1249 }
1250 
1251 #define	CIPSO_GENERIC_ARRAY_LEN	200
1252 
1253 /*
1254  * Return 1 if CIPSO SL and Categories are all 1's; 0 otherwise.
1255  *
1256  * Note: opt starts with "Tag Type":
1257  *
1258  * |tag_type(1)|tag_length(1)|align(1)|sl(1)|categories(variable)|
1259  *
1260  */
1261 static boolean_t
cipso_high(const uchar_t * opt)1262 cipso_high(const uchar_t *opt)
1263 {
1264 	int i;
1265 
1266 	if (((int)opt[1] + 6) < IP_MAX_OPT_LENGTH)
1267 		return (B_FALSE);
1268 	for (i = 0; i < ((int)opt[1] - 3); i++)
1269 		if (opt[3 + i] != 0xff)
1270 			return (B_FALSE);
1271 	return (B_TRUE);
1272 }
1273 
1274 /*
1275  * Converts CIPSO label to SL.
1276  *
1277  * Note: opt starts with "Tag Type":
1278  *
1279  * |tag_type(1)|tag_length(1)|align(1)|sl(1)|categories(variable)|
1280  *
1281  */
1282 static void
cipso2sl(const uchar_t * opt,bslabel_t * sl,int * high)1283 cipso2sl(const uchar_t *opt, bslabel_t *sl, int *high)
1284 {
1285 	int i, taglen;
1286 	uchar_t *q = (uchar_t *)&((_bslabel_impl_t *)sl)->compartments;
1287 
1288 	*high = 0;
1289 	taglen = opt[1];
1290 	memset((caddr_t)sl, 0, sizeof (bslabel_t));
1291 
1292 	if (cipso_high(opt)) {
1293 		BSLHIGH(sl);
1294 		*high = 1;
1295 	} else {
1296 		LCLASS_SET((_bslabel_impl_t *)sl, opt[3]);
1297 		for (i = 0; i < taglen - TSOL_TT1_MIN_LENGTH; i++)
1298 			q[i] = opt[TSOL_TT1_MIN_LENGTH + i];
1299 	}
1300 	SETBLTYPE(sl, SUN_SL_ID);
1301 }
1302 
1303 static int
interpret_cipso_tagtype1(const uchar_t * opt)1304 interpret_cipso_tagtype1(const uchar_t *opt)
1305 {
1306 	int i, taglen, ishigh;
1307 	bslabel_t sl;
1308 	char line[CIPSO_GENERIC_ARRAY_LEN], *ptr;
1309 
1310 	taglen = opt[1];
1311 	if (taglen < TSOL_TT1_MIN_LENGTH ||
1312 	    taglen > TSOL_TT1_MAX_LENGTH)
1313 		return (taglen);
1314 
1315 	(void) snprintf(get_line(0, 0), get_line_remain(),
1316 	    "Tag Type = %d, Tag Length = %d", opt[0], opt[1]);
1317 	(void) snprintf(get_line(0, 0), get_line_remain(),
1318 	    "Sensitivity Level = 0x%02x", opt[3]);
1319 	ptr = line;
1320 	for (i = 0; i < taglen - TSOL_TT1_MIN_LENGTH; i++) {
1321 		(void) snprintf(ptr, sizeof (line) - (ptr - line), "%02x",
1322 		    opt[TSOL_TT1_MIN_LENGTH + i]);
1323 		ptr = strchr(ptr, 0);
1324 	}
1325 	if (i != 0) {
1326 		(void) snprintf(get_line(0, 0), get_line_remain(),
1327 		    "Categories = ");
1328 		(void) snprintf(get_line(0, 0), get_line_remain(), "\t%s",
1329 		    line);
1330 	} else {
1331 		(void) snprintf(get_line(0, 0), get_line_remain(),
1332 		    "Categories = None");
1333 	}
1334 	cipso2sl(opt, &sl, &ishigh);
1335 	if (is_system_labeled()) {
1336 		if (bsltos(&sl, &plabel, ALABEL_MAXLEN,
1337 		    LONG_CLASSIFICATION|LONG_WORDS|VIEW_INTERNAL) < 0) {
1338 			(void) snprintf(get_line(0, 0), get_line_remain(),
1339 			    "The Sensitivity Level and Categories can't be "
1340 			    "mapped to a valid SL");
1341 		} else {
1342 			(void) snprintf(get_line(0, 0), get_line_remain(),
1343 			    "The Sensitivity Level and Categories are mapped "
1344 			    "to the SL:");
1345 			(void) snprintf(get_line(0, 0), get_line_remain(),
1346 			    "\t%s", ascii_label);
1347 		}
1348 	}
1349 	return (taglen);
1350 }
1351 
1352 /*
1353  * The following struct definition #define's are copied from TS1.x. They are
1354  * not used here (except TTYPE_3_MAX_TOKENS), but included as a reference for
1355  * the tag type 3 packet format.
1356  */
1357 #define	TTYPE_3_MAX_TOKENS	7
1358 
1359 /*
1360  * Display CIPSO tag type 3 which is defined by MAXSIX.
1361  */
1362 static int
interpret_cipso_tagtype3(const uchar_t * opt)1363 interpret_cipso_tagtype3(const uchar_t *opt)
1364 {
1365 	uchar_t tagtype;
1366 	int index, numtokens, taglen;
1367 	uint16_t mask;
1368 	uint32_t token;
1369 	static const char *name[] = {
1370 		"SL",
1371 		"NCAV",
1372 		"INTEG",
1373 		"SID",
1374 		"undefined",
1375 		"undefined",
1376 		"IL",
1377 		"PRIVS",
1378 		"LUID",
1379 		"PID",
1380 		"IDS",
1381 		"ACL"
1382 	};
1383 
1384 	tagtype = *opt++;
1385 	(void) memcpy(&mask, opt + 3, sizeof (mask));
1386 	(void) snprintf(get_line(0, 0), get_line_remain(),
1387 	    "Tag Type = %d (MAXSIX)", tagtype);
1388 	(void) snprintf(get_line(0, 0), get_line_remain(),
1389 	    "Generation = 0x%02x%02x%02x, Mask = 0x%04x", opt[0], opt[1],
1390 	    opt[2], mask);
1391 	opt += 3 + sizeof (mask);
1392 
1393 	/*
1394 	 * Display tokens
1395 	 */
1396 	numtokens = 0;
1397 	index = 0;
1398 	while (mask != 0 && numtokens < TTYPE_3_MAX_TOKENS) {
1399 		if (mask & 0x0001) {
1400 			(void) memcpy(&token, opt, sizeof (token));
1401 			opt += sizeof (token);
1402 			(void) snprintf(get_line(0, 0), get_line_remain(),
1403 			    "Attribute = %s, Token = 0x%08x",
1404 			    index < sizeof (name) / sizeof (*name) ?
1405 			    name[index] : "unknown", token);
1406 			numtokens++;
1407 		}
1408 		mask = mask >> 1;
1409 		index++;
1410 	}
1411 
1412 	taglen = 6 + numtokens * 4;
1413 	return (taglen);
1414 }
1415 
1416 static void
print_cipso(const uchar_t * opt)1417 print_cipso(const uchar_t *opt)
1418 {
1419 	int optlen, taglen, tagnum;
1420 	uint32_t doi;
1421 	char line[CIPSO_GENERIC_ARRAY_LEN];
1422 	char *oldnest;
1423 
1424 	optlen = opt[1];
1425 	if (optlen < TSOL_CIPSO_MIN_LENGTH || optlen > TSOL_CIPSO_MAX_LENGTH)
1426 		return;
1427 
1428 	oldnest = prot_nest_prefix;
1429 	prot_nest_prefix = prot_prefix;
1430 	show_header("CIPSO:  ", "Common IP Security Option", 0);
1431 	show_space();
1432 
1433 	/*
1434 	 * Display CIPSO Header
1435 	 */
1436 	(void) snprintf(get_line(0, 0), get_line_remain(),
1437 	    "Type = CIPSO (%d), Length = %d", opt[0], opt[1]);
1438 	(void) memcpy(&doi, opt + 2, sizeof (doi));
1439 	(void) snprintf(get_line(0, 0), get_line_remain(),
1440 	    "Domain of Interpretation = %u", (unsigned)ntohl(doi));
1441 
1442 	if (opt[1] == TSOL_CIPSO_MIN_LENGTH) {	/* no tags */
1443 		show_space();
1444 		prot_prefix = prot_nest_prefix;
1445 		prot_nest_prefix = oldnest;
1446 		return;
1447 	}
1448 	optlen -= TSOL_CIPSO_MIN_LENGTH;
1449 	opt += TSOL_CIPSO_MIN_LENGTH;
1450 
1451 	/*
1452 	 * Display Each Tag
1453 	 */
1454 	tagnum = 1;
1455 	while (optlen >= TSOL_TT1_MIN_LENGTH) {
1456 		(void) snprintf(line, sizeof (line), "Tag# %d", tagnum);
1457 		show_header("CIPSO:  ", line, 0);
1458 		/*
1459 		 * We handle tag type 1 and 3 only. Note, tag type 3
1460 		 * is MAXSIX defined.
1461 		 */
1462 		switch (opt[0]) {
1463 		case 1:
1464 			taglen = interpret_cipso_tagtype1(opt);
1465 			break;
1466 		case 3:
1467 			taglen = interpret_cipso_tagtype3(opt);
1468 			break;
1469 		default:
1470 			(void) snprintf(get_line(0, 0), get_line_remain(),
1471 			    "Unknown Tag Type %d", opt[0]);
1472 			show_space();
1473 			prot_prefix = prot_nest_prefix;
1474 			prot_nest_prefix = oldnest;
1475 			return;
1476 		}
1477 
1478 		/*
1479 		 * Move to the next tag
1480 		 */
1481 		if (taglen <= 0)
1482 			break;
1483 		optlen -= taglen;
1484 		opt += taglen;
1485 		tagnum++;
1486 	}
1487 	show_space();
1488 	prot_prefix = prot_nest_prefix;
1489 	prot_nest_prefix = oldnest;
1490 }
1491