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