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_DCCP: /* fallthru */ 147 case IPPROTO_SCTP: 148 case IPPROTO_TCP: pt = pt_tcp; break; 149 case IPPROTO_UDP: pt = pt_udp; break; 150 default: return (NULL); 151 } 152 153 for (p = pt; p->pt_num; p++) { 154 if (port == p->pt_num) 155 return (p->pt_short); 156 } 157 return (NULL); 158 } 159 160 int 161 reservedport(int proto, int port) 162 { 163 const struct porttable *p, *pt; 164 165 switch (proto) { 166 case IPPROTO_TCP: pt = pt_tcp; break; 167 case IPPROTO_UDP: pt = pt_udp; break; 168 default: return (NULL); 169 } 170 for (p = pt; p->pt_num; p++) { 171 if (port == p->pt_num) 172 return (1); 173 } 174 return (0); 175 } 176 177 /* 178 * Need to be able to register an 179 * interpreter for transient ports. 180 * See TFTP interpreter. 181 */ 182 #define MAXTRANS 64 183 static struct ttable { 184 int t_port; 185 int (*t_proc)(int, char *, int); 186 } transients [MAXTRANS]; 187 188 int 189 add_transient(int port, int (*proc)(int, char *, int)) 190 { 191 static struct ttable *next = transients; 192 193 next->t_port = port; 194 next->t_proc = proc; 195 196 if (++next >= &transients[MAXTRANS]) 197 next = transients; 198 199 return (1); 200 } 201 202 static struct ttable * 203 is_transient(int port) 204 { 205 struct ttable *p; 206 207 for (p = transients; p->t_port && p < &transients[MAXTRANS]; p++) { 208 if (port == p->t_port) 209 return (p); 210 } 211 212 return (NULL); 213 } 214 215 void 216 del_transient(int port) 217 { 218 struct ttable *p; 219 220 for (p = transients; p->t_port && p < &transients[MAXTRANS]; p++) { 221 if (port == p->t_port) 222 p->t_port = -1; 223 } 224 } 225 226 static void 227 interpret_syslog(int flags, char dir, int port, const char *syslogstr, 228 int dlen) 229 { 230 static const char *pris[] = { 231 "emerg", "alert", "crit", "error", "warn", "notice", "info", "debug" 232 }; 233 static const char *facs[] = { 234 "kern", "user", "mail", "daemon", "auth", "syslog", "lpr", "news", 235 "uucp", NULL, NULL, NULL, NULL, "audit", NULL, "cron", "local0", 236 "local1", "local2", "local3", "local4", "local5", "local6", "local7" 237 }; 238 239 int composit; 240 int pri = -1; 241 int facil = -1; 242 boolean_t bogus = B_TRUE; 243 int priostrlen = 0; 244 int datalen = dlen; 245 char unknown[4]; /* for unrecognized ones */ 246 const char *facilstr = "BAD"; 247 const char *pristr = "FMT"; 248 const char *data = syslogstr; 249 250 /* 251 * Is there enough data to interpret (left bracket + at least 3 chars 252 * which could be digits, right bracket, or space)? 253 */ 254 if (datalen >= 4 && data != NULL) { 255 if (*data == '<') { 256 const int FACS_LEN = sizeof (facs) / sizeof (facs[0]); 257 char buffer[4]; 258 char *end; 259 260 data++; 261 datalen--; 262 263 (void) strlcpy(buffer, data, sizeof (buffer)); 264 composit = strtoul(buffer, &end, 0); 265 data += end - buffer; 266 if (*data == '>') { 267 data++; 268 datalen -= end - buffer + 1; 269 270 pri = composit & 0x7; 271 facil = (composit & 0xF8) >> 3; 272 273 if ((facil >= FACS_LEN) || 274 (facs[facil] == NULL)) { 275 snprintf(unknown, sizeof (unknown), 276 "%d", facil); 277 facilstr = unknown; 278 } else { 279 facilstr = facs[facil]; 280 } 281 pristr = pris[pri]; 282 priostrlen = dlen - datalen; 283 bogus = B_FALSE; 284 } else { 285 data = syslogstr; 286 datalen = dlen; 287 } 288 } 289 } 290 291 if (flags & F_SUM) { 292 (void) snprintf(get_sum_line(), MAXLINE, 293 "SYSLOG %c port=%d %s.%s: %s", 294 dir, port, facilstr, pristr, 295 show_string(syslogstr, dlen, 20)); 296 297 } 298 299 if (flags & F_DTAIL) { 300 static char syslog[] = "SYSLOG: "; 301 show_header(syslog, syslog, dlen); 302 show_space(); 303 (void) snprintf(get_detail_line(0, 0), MAXLINE, 304 "%s%sPriority: %.*s%s(%s.%s)", prot_nest_prefix, syslog, 305 priostrlen, syslogstr, bogus ? "" : " ", 306 facilstr, pristr); 307 (void) snprintf(get_line(0, 0), get_line_remain(), 308 "\"%s\"", 309 show_string(syslogstr, dlen, 60)); 310 show_trailer(); 311 } 312 } 313 314 int src_port, dst_port, curr_proto; 315 316 int 317 interpret_reserved(int flags, int proto, in_port_t src, in_port_t dst, 318 char *data, int dlen) 319 { 320 const char *pn; 321 int dir, port, which; 322 char pbuff[16], hbuff[32]; 323 struct ttable *ttabp; 324 325 src_port = src; 326 dst_port = dst; 327 curr_proto = proto; 328 329 pn = getportname(proto, src); 330 if (pn != NULL) { 331 dir = 'R'; 332 port = dst; 333 which = src; 334 } else { 335 pn = getportname(proto, dst); 336 if (pn == NULL) { 337 ttabp = is_transient(src); 338 if (ttabp) { 339 (ttabp->t_proc)(flags, data, dlen); 340 return (1); 341 } 342 ttabp = is_transient(dst); 343 if (ttabp) { 344 (ttabp->t_proc)(flags, data, dlen); 345 return (1); 346 } 347 return (0); 348 } 349 350 dir = 'C'; 351 port = src; 352 which = dst; 353 } 354 355 if ((dst == IPPORT_DOMAIN || src == IPPORT_DOMAIN || 356 dst == IPPORT_MDNS || src == IPPORT_MDNS) && 357 proto != IPPROTO_TCP) { 358 interpret_dns(flags, proto, (uchar_t *)data, dlen, which); 359 return (1); 360 } 361 362 if (dst == IPPORT_SYSLOG && proto != IPPROTO_TCP) { 363 /* 364 * TCP port 514 is rshell. UDP port 514 is syslog. 365 */ 366 interpret_syslog(flags, dir, port, (const char *)data, dlen); 367 return (1); 368 } 369 370 if (dlen > 0) { 371 switch (which) { 372 case IPPORT_BOOTPS: 373 case IPPORT_BOOTPC: 374 (void) interpret_dhcp(flags, (struct dhcp *)data, 375 dlen); 376 return (1); 377 case IPPORT_DHCPV6S: 378 case IPPORT_DHCPV6C: 379 (void) interpret_dhcpv6(flags, (uint8_t *)data, dlen); 380 return (1); 381 case IPPORT_TFTP: 382 (void) interpret_tftp(flags, (struct tftphdr *)data, 383 dlen); 384 return (1); 385 case IPPORT_HTTP: 386 case IPPORT_HTTP_ALT: 387 (void) interpret_http(flags, data, dlen); 388 return (1); 389 case IPPORT_NTP: 390 (void) interpret_ntp(flags, (struct ntpdata *)data, 391 dlen); 392 return (1); 393 case IPPORT_NETBIOS_NS: 394 interpret_netbios_ns(flags, (uchar_t *)data, dlen); 395 return (1); 396 case IPPORT_NETBIOS_DGM: 397 interpret_netbios_datagram(flags, (uchar_t *)data, 398 dlen); 399 return (1); 400 case IPPORT_NETBIOS_SSN: 401 case 445: 402 /* 403 * SMB on port 445 is a subset of NetBIOS SMB 404 * on port 139. The same interpreter can be used 405 * for both. 406 */ 407 interpret_netbios_ses(flags, (uchar_t *)data, dlen); 408 return (1); 409 case IPPORT_LDAP: 410 interpret_ldap(flags, data, dlen, src, dst); 411 return (1); 412 case IPPORT_SLP: 413 interpret_slp(flags, data, dlen); 414 return (1); 415 case IPPORT_MIP: 416 interpret_mip_cntrlmsg(flags, (uchar_t *)data, dlen); 417 return (1); 418 case IPPORT_ROUTESERVER: 419 (void) interpret_rip(flags, (struct rip *)data, dlen); 420 return (1); 421 case IPPORT_RIPNG: 422 (void) interpret_rip6(flags, (struct rip6 *)data, 423 dlen); 424 return (1); 425 case IPPORT_SOCKS: 426 if (dir == 'C') 427 (void) interpret_socks_call(flags, data, dlen); 428 else 429 (void) interpret_socks_reply(flags, data, 430 dlen); 431 return (1); 432 } 433 } 434 435 if (flags & F_SUM) { 436 (void) snprintf(get_sum_line(), MAXLINE, 437 "%s %c port=%d %s", 438 pn, dir, port, 439 show_string(data, dlen, 20)); 440 } 441 442 if (flags & F_DTAIL) { 443 (void) snprintf(pbuff, sizeof (pbuff), "%s: ", pn); 444 (void) snprintf(hbuff, sizeof (hbuff), "%s: ", pn); 445 show_header(pbuff, hbuff, dlen); 446 show_space(); 447 (void) snprintf(get_line(0, 0), get_line_remain(), 448 "\"%s\"", 449 show_string(data, dlen, 60)); 450 show_trailer(); 451 } 452 return (1); 453 }