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 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <strings.h>
29 #include <sys/sysmacros.h>
30 #include <sys/types.h>
31 #include <sys/errno.h>
32 #include <setjmp.h>
33 #include <sys/socket.h>
34 #include <net/if.h>
35 #include <netinet/in_systm.h>
36 #include <netinet/in.h>
37 #include <netinet/ip.h>
38 #include <netinet/if_ether.h>
39 #include "snoop.h"
40
41 struct porttable {
42 int pt_num;
43 char *pt_short;
44 };
45
46 static const struct porttable pt_udp[] = {
47 { IPPORT_ECHO, "ECHO" },
48 { IPPORT_DISCARD, "DISCARD" },
49 { IPPORT_DAYTIME, "DAYTIME" },
50 { IPPORT_CHARGEN, "CHARGEN" },
51 { IPPORT_TIMESERVER, "TIME" },
52 { IPPORT_NAMESERVER, "NAME" },
53 { IPPORT_DOMAIN, "DNS" },
54 { IPPORT_MDNS, "MDNS" },
55 { IPPORT_BOOTPS, "BOOTPS" },
56 { IPPORT_BOOTPC, "BOOTPC" },
57 { IPPORT_TFTP, "TFTP" },
58 { IPPORT_FINGER, "FINGER" },
59 /* { 111, "PORTMAP" }, Just Sun RPC */
60 { IPPORT_NTP, "NTP" },
61 { IPPORT_NETBIOS_NS, "NBNS" },
62 { IPPORT_NETBIOS_DGM, "NBDG" },
63 { IPPORT_LDAP, "LDAP" },
64 { IPPORT_SLP, "SLP" },
65 /* Mobile IP defines a set of new control messages sent over UDP port 434 */
66 { IPPORT_MIP, "Mobile IP" },
67 { IPPORT_BIFFUDP, "BIFF" },
68 { IPPORT_WHOSERVER, "WHO" },
69 { IPPORT_SYSLOG, "SYSLOG" },
70 { IPPORT_TALK, "TALK" },
71 { IPPORT_ROUTESERVER, "RIP" },
72 { IPPORT_RIPNG, "RIPng" },
73 { IPPORT_DHCPV6C, "DHCPv6C" },
74 { IPPORT_DHCPV6S, "DHCPv6S" },
75 { 550, "NEW-RWHO" },
76 { 560, "RMONITOR" },
77 { 561, "MONITOR" },
78 { IPPORT_SOCKS, "SOCKS" },
79 { 0, NULL }
80 };
81
82 static struct porttable pt_tcp[] = {
83 { 1, "TCPMUX" },
84 { IPPORT_ECHO, "ECHO" },
85 { IPPORT_DISCARD, "DISCARD" },
86 { IPPORT_SYSTAT, "SYSTAT" },
87 { IPPORT_DAYTIME, "DAYTIME" },
88 { IPPORT_NETSTAT, "NETSTAT" },
89 { IPPORT_CHARGEN, "CHARGEN" },
90 { 20, "FTP-DATA" },
91 { IPPORT_FTP, "FTP" },
92 { IPPORT_TELNET, "TELNET" },
93 { IPPORT_SMTP, "SMTP" },
94 { IPPORT_TIMESERVER, "TIME" },
95 { 39, "RLP" },
96 { IPPORT_NAMESERVER, "NAMESERVER" },
97 { IPPORT_WHOIS, "NICNAME" },
98 { IPPORT_DOMAIN, "DNS" },
99 { 70, "GOPHER" },
100 { IPPORT_RJE, "RJE" },
101 { IPPORT_FINGER, "FINGER" },
102 { IPPORT_HTTP, "HTTP" },
103 { IPPORT_TTYLINK, "LINK" },
104 { IPPORT_SUPDUP, "SUPDUP" },
105 { 101, "HOSTNAME" },
106 { 102, "ISO-TSAP" },
107 { 103, "X400" },
108 { 104, "X400-SND" },
109 { 105, "CSNET-NS" },
110 { 109, "POP-2" },
111 /* { 111, "PORTMAP" }, Just Sun RPC */
112 { 113, "AUTH" },
113 { 117, "UUCP-PATH" },
114 { 119, "NNTP" },
115 { IPPORT_NTP, "NTP" },
116 { IPPORT_NETBIOS_SSN, "NBT" },
117 { 143, "IMAP" },
118 { 144, "NeWS" },
119 { IPPORT_LDAP, "LDAP" },
120 { IPPORT_SLP, "SLP" },
121 { 443, "HTTPS" },
122 { 445, "SMB" },
123 { IPPORT_EXECSERVER, "EXEC" },
124 { IPPORT_LOGINSERVER, "RLOGIN" },
125 { IPPORT_CMDSERVER, "RSHELL" },
126 { IPPORT_PRINTER, "PRINTER" },
127 { 530, "COURIER" },
128 { 540, "UUCP" },
129 { 600, "PCSERVER" },
130 { IPPORT_SOCKS, "SOCKS" },
131 { 1524, "INGRESLOCK" },
132 { 2904, "M2UA" },
133 { 2905, "M3UA" },
134 { 6000, "XWIN" },
135 { IPPORT_HTTP_ALT, "HTTP (proxy)" },
136 { 9900, "IUA" },
137 { 0, NULL },
138 };
139
140 char *
141 getportname(int proto, in_port_t port)
142 {
143 const struct porttable *p, *pt;
144
145 switch (proto) {
146 case IPPROTO_SCTP: /* fallthru */
147 case IPPROTO_TCP: pt = pt_tcp; break;
148 case IPPROTO_UDP: pt = pt_udp; break;
149 default: return (NULL);
150 }
151
152 for (p = pt; p->pt_num; p++) {
153 if (port == p->pt_num)
154 return (p->pt_short);
155 }
156 return (NULL);
157 }
158
159 int
160 reservedport(int proto, int port)
161 {
162 const struct porttable *p, *pt;
163
164 switch (proto) {
165 case IPPROTO_TCP: pt = pt_tcp; break;
166 case IPPROTO_UDP: pt = pt_udp; break;
167 default: return (NULL);
168 }
169 for (p = pt; p->pt_num; p++) {
170 if (port == p->pt_num)
171 return (1);
172 }
173 return (0);
174 }
175
176 /*
177 * Need to be able to register an
178 * interpreter for transient ports.
179 * See TFTP interpreter.
180 */
181 #define MAXTRANS 64
182 static struct ttable {
183 int t_port;
184 int (*t_proc)(int, char *, int);
185 } transients [MAXTRANS];
186
187 int
188 add_transient(int port, int (*proc)(int, char *, int))
189 {
190 static struct ttable *next = transients;
191
192 next->t_port = port;
193 next->t_proc = proc;
194
195 if (++next >= &transients[MAXTRANS])
196 next = transients;
197
198 return (1);
199 }
200
201 static struct ttable *
202 is_transient(int port)
203 {
204 struct ttable *p;
205
206 for (p = transients; p->t_port && p < &transients[MAXTRANS]; p++) {
207 if (port == p->t_port)
208 return (p);
209 }
210
211 return (NULL);
212 }
213
214 void
215 del_transient(int port)
216 {
217 struct ttable *p;
218
219 for (p = transients; p->t_port && p < &transients[MAXTRANS]; p++) {
220 if (port == p->t_port)
221 p->t_port = -1;
222 }
223 }
224
225 static void
226 interpret_syslog(int flags, char dir, int port, const char *syslogstr,
227 int dlen)
228 {
229 static const char *pris[] = {
230 "emerg", "alert", "crit", "error", "warn", "notice", "info", "debug"
231 };
232 static const char *facs[] = {
233 "kern", "user", "mail", "daemon", "auth", "syslog", "lpr", "news",
234 "uucp", NULL, NULL, NULL, NULL, "audit", NULL, "cron", "local0",
235 "local1", "local2", "local3", "local4", "local5", "local6", "local7"
236 };
237
238 int composit;
239 int pri = -1;
240 int facil = -1;
241 boolean_t bogus = B_TRUE;
242 int priostrlen = 0;
243 int datalen = dlen;
244 char unknown[4]; /* for unrecognized ones */
245 const char *facilstr = "BAD";
246 const char *pristr = "FMT";
247 const char *data = syslogstr;
248
249 /*
250 * Is there enough data to interpret (left bracket + at least 3 chars
251 * which could be digits, right bracket, or space)?
252 */
253 if (datalen >= 4 && data != NULL) {
254 if (*data == '<') {
255 const int FACS_LEN = sizeof (facs) / sizeof (facs[0]);
256 char buffer[4];
257 char *end;
258
259 data++;
260 datalen--;
261
262 (void) strlcpy(buffer, data, sizeof (buffer));
263 composit = strtoul(buffer, &end, 0);
264 data += end - buffer;
265 if (*data == '>') {
266 data++;
267 datalen -= end - buffer + 1;
268
269 pri = composit & 0x7;
270 facil = (composit & 0xF8) >> 3;
271
272 if ((facil >= FACS_LEN) ||
273 (facs[facil] == NULL)) {
274 snprintf(unknown, sizeof (unknown),
275 "%d", facil);
276 facilstr = unknown;
277 } else {
278 facilstr = facs[facil];
279 }
280 pristr = pris[pri];
281 priostrlen = dlen - datalen;
282 bogus = B_FALSE;
283 } else {
284 data = syslogstr;
285 datalen = dlen;
286 }
287 }
288 }
289
290 if (flags & F_SUM) {
291 (void) snprintf(get_sum_line(), MAXLINE,
292 "SYSLOG %c port=%d %s.%s: %s",
293 dir, port, facilstr, pristr,
294 show_string(syslogstr, dlen, 20));
295
296 }
297
298 if (flags & F_DTAIL) {
299 static char syslog[] = "SYSLOG: ";
300 show_header(syslog, syslog, dlen);
301 show_space();
302 (void) snprintf(get_detail_line(0, 0), MAXLINE,
303 "%s%sPriority: %.*s%s(%s.%s)", prot_nest_prefix, syslog,
304 priostrlen, syslogstr, bogus ? "" : " ",
305 facilstr, pristr);
306 (void) snprintf(get_line(0, 0), get_line_remain(),
307 "\"%s\"",
308 show_string(syslogstr, dlen, 60));
309 show_trailer();
310 }
311 }
312
313 int src_port, dst_port, curr_proto;
314
315 int
316 interpret_reserved(int flags, int proto, in_port_t src, in_port_t dst,
317 char *data, int dlen)
318 {
319 const char *pn;
320 int dir, port, which;
321 char pbuff[16], hbuff[32];
322 struct ttable *ttabp;
323
324 src_port = src;
325 dst_port = dst;
326 curr_proto = proto;
327
328 pn = getportname(proto, src);
329 if (pn != NULL) {
330 dir = 'R';
331 port = dst;
332 which = src;
333 } else {
334 pn = getportname(proto, dst);
335 if (pn == NULL) {
336 ttabp = is_transient(src);
337 if (ttabp) {
338 (ttabp->t_proc)(flags, data, dlen);
339 return (1);
340 }
341 ttabp = is_transient(dst);
342 if (ttabp) {
343 (ttabp->t_proc)(flags, data, dlen);
344 return (1);
345 }
346 return (0);
347 }
348
349 dir = 'C';
350 port = src;
351 which = dst;
352 }
353
354 if ((dst == IPPORT_DOMAIN || src == IPPORT_DOMAIN ||
355 dst == IPPORT_MDNS || src == IPPORT_MDNS) &&
356 proto != IPPROTO_TCP) {
357 interpret_dns(flags, proto, (uchar_t *)data, dlen, which);
358 return (1);
359 }
360
361 if (dst == IPPORT_SYSLOG && proto != IPPROTO_TCP) {
362 /*
363 * TCP port 514 is rshell. UDP port 514 is syslog.
364 */
365 interpret_syslog(flags, dir, port, (const char *)data, dlen);
366 return (1);
367 }
368
369 if (dlen > 0) {
370 switch (which) {
371 case IPPORT_BOOTPS:
372 case IPPORT_BOOTPC:
373 (void) interpret_dhcp(flags, (struct dhcp *)data,
374 dlen);
375 return (1);
376 case IPPORT_DHCPV6S:
377 case IPPORT_DHCPV6C:
378 (void) interpret_dhcpv6(flags, (uint8_t *)data, dlen);
379 return (1);
380 case IPPORT_TFTP:
381 (void) interpret_tftp(flags, (struct tftphdr *)data,
382 dlen);
383 return (1);
384 case IPPORT_HTTP:
385 case IPPORT_HTTP_ALT:
386 (void) interpret_http(flags, data, dlen);
387 return (1);
388 case IPPORT_NTP:
389 (void) interpret_ntp(flags, (struct ntpdata *)data,
390 dlen);
391 return (1);
392 case IPPORT_NETBIOS_NS:
393 interpret_netbios_ns(flags, (uchar_t *)data, dlen);
394 return (1);
395 case IPPORT_NETBIOS_DGM:
396 interpret_netbios_datagram(flags, (uchar_t *)data,
397 dlen);
398 return (1);
399 case IPPORT_NETBIOS_SSN:
400 case 445:
401 /*
402 * SMB on port 445 is a subset of NetBIOS SMB
403 * on port 139. The same interpreter can be used
404 * for both.
405 */
406 interpret_netbios_ses(flags, (uchar_t *)data, dlen);
407 return (1);
408 case IPPORT_LDAP:
409 interpret_ldap(flags, data, dlen, src, dst);
410 return (1);
411 case IPPORT_SLP:
412 interpret_slp(flags, data, dlen);
413 return (1);
414 case IPPORT_MIP:
415 interpret_mip_cntrlmsg(flags, (uchar_t *)data, dlen);
416 return (1);
417 case IPPORT_ROUTESERVER:
418 (void) interpret_rip(flags, (struct rip *)data, dlen);
419 return (1);
420 case IPPORT_RIPNG:
421 (void) interpret_rip6(flags, (struct rip6 *)data,
422 dlen);
423 return (1);
424 case IPPORT_SOCKS:
425 if (dir == 'C')
426 (void) interpret_socks_call(flags, data, dlen);
427 else
428 (void) interpret_socks_reply(flags, data,
429 dlen);
430 return (1);
431 }
432 }
433
434 if (flags & F_SUM) {
435 (void) snprintf(get_sum_line(), MAXLINE,
436 "%s %c port=%d %s",
437 pn, dir, port,
438 show_string(data, dlen, 20));
439 }
440
441 if (flags & F_DTAIL) {
442 (void) snprintf(pbuff, sizeof (pbuff), "%s: ", pn);
443 (void) snprintf(hbuff, sizeof (hbuff), "%s: ", pn);
444 show_header(pbuff, hbuff, dlen);
445 show_space();
446 (void) snprintf(get_line(0, 0), get_line_remain(),
447 "\"%s\"",
448 show_string(data, dlen, 60));
449 show_trailer();
450 }
451 return (1);
452 }