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 * Copyright 2015, Joyent, Inc. 25 */ 26 27 #include <stdio.h> 28 #include <stdlib.h> 29 #include <strings.h> 30 #include <sys/sysmacros.h> 31 #include <sys/types.h> 32 #include <sys/errno.h> 33 #include <setjmp.h> 34 #include <sys/socket.h> 35 #include <net/if.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/in.h> 38 #include <netinet/ip.h> 39 #include <netinet/if_ether.h> 40 #include "snoop.h" 41 42 struct porttable { 43 int pt_num; 44 char *pt_short; 45 }; 46 47 static const struct porttable pt_udp[] = { 48 { IPPORT_ECHO, "ECHO" }, 49 { IPPORT_DISCARD, "DISCARD" }, 50 { IPPORT_DAYTIME, "DAYTIME" }, 51 { IPPORT_CHARGEN, "CHARGEN" }, 52 { IPPORT_TIMESERVER, "TIME" }, 53 { IPPORT_NAMESERVER, "NAME" }, 54 { IPPORT_DOMAIN, "DNS" }, 55 { IPPORT_MDNS, "MDNS" }, 56 { IPPORT_BOOTPS, "BOOTPS" }, 57 { IPPORT_BOOTPC, "BOOTPC" }, 58 { IPPORT_TFTP, "TFTP" }, 59 { IPPORT_FINGER, "FINGER" }, 60 /* { 111, "PORTMAP" }, Just Sun RPC */ 61 { IPPORT_NTP, "NTP" }, 62 { IPPORT_NETBIOS_NS, "NBNS" }, 63 { IPPORT_NETBIOS_DGM, "NBDG" }, 64 { IPPORT_LDAP, "LDAP" }, 65 { IPPORT_SLP, "SLP" }, 66 /* Mobile IP defines a set of new control messages sent over UDP port 434 */ 67 { IPPORT_MIP, "Mobile IP" }, 68 { IPPORT_BIFFUDP, "BIFF" }, 69 { IPPORT_WHOSERVER, "WHO" }, 70 { IPPORT_SYSLOG, "SYSLOG" }, 71 { IPPORT_TALK, "TALK" }, 72 { IPPORT_ROUTESERVER, "RIP" }, 73 { IPPORT_RIPNG, "RIPng" }, 74 { IPPORT_DHCPV6C, "DHCPv6C" }, 75 { IPPORT_DHCPV6S, "DHCPv6S" }, 76 { 550, "NEW-RWHO" }, 77 { 560, "RMONITOR" }, 78 { 561, "MONITOR" }, 79 { IPPORT_SOCKS, "SOCKS" }, 80 { IPPORT_VXLAN, "VXLAN" }, 81 { 0, NULL } 82 }; 83 84 static struct porttable pt_tcp[] = { 85 { 1, "TCPMUX" }, 86 { IPPORT_ECHO, "ECHO" }, 87 { IPPORT_DISCARD, "DISCARD" }, 88 { IPPORT_SYSTAT, "SYSTAT" }, 89 { IPPORT_DAYTIME, "DAYTIME" }, 90 { IPPORT_NETSTAT, "NETSTAT" }, 91 { IPPORT_CHARGEN, "CHARGEN" }, 92 { 20, "FTP-DATA" }, 93 { IPPORT_FTP, "FTP" }, 94 { IPPORT_TELNET, "TELNET" }, 95 { IPPORT_SMTP, "SMTP" }, 96 { IPPORT_TIMESERVER, "TIME" }, 97 { 39, "RLP" }, 98 { IPPORT_NAMESERVER, "NAMESERVER" }, 99 { IPPORT_WHOIS, "NICNAME" }, 100 { IPPORT_DOMAIN, "DNS" }, 101 { 70, "GOPHER" }, 102 { IPPORT_RJE, "RJE" }, 103 { IPPORT_FINGER, "FINGER" }, 104 { IPPORT_HTTP, "HTTP" }, 105 { IPPORT_TTYLINK, "LINK" }, 106 { IPPORT_SUPDUP, "SUPDUP" }, 107 { 101, "HOSTNAME" }, 108 { 102, "ISO-TSAP" }, 109 { 103, "X400" }, 110 { 104, "X400-SND" }, 111 { 105, "CSNET-NS" }, 112 { 109, "POP-2" }, 113 /* { 111, "PORTMAP" }, Just Sun RPC */ 114 { 113, "AUTH" }, 115 { 117, "UUCP-PATH" }, 116 { 119, "NNTP" }, 117 { IPPORT_NTP, "NTP" }, 118 { IPPORT_NETBIOS_SSN, "NBT" }, 119 { 143, "IMAP" }, 120 { 144, "NeWS" }, 121 { IPPORT_LDAP, "LDAP" }, 122 { IPPORT_SLP, "SLP" }, 123 { 443, "HTTPS" }, 124 { 445, "SMB" }, 125 { IPPORT_EXECSERVER, "EXEC" }, 126 { IPPORT_LOGINSERVER, "RLOGIN" }, 127 { IPPORT_CMDSERVER, "RSHELL" }, 128 { IPPORT_PRINTER, "PRINTER" }, 129 { 530, "COURIER" }, 130 { 540, "UUCP" }, 131 { 600, "PCSERVER" }, 132 { IPPORT_SOCKS, "SOCKS" }, 133 { 1524, "INGRESLOCK" }, 134 { 2904, "M2UA" }, 135 { 2905, "M3UA" }, 136 { 6000, "XWIN" }, 137 { IPPORT_HTTP_ALT, "HTTP (proxy)" }, 138 { 9900, "IUA" }, 139 { 0, NULL }, 140 }; 141 142 char * 143 getportname(int proto, in_port_t port) 144 { 145 const struct porttable *p, *pt; 146 147 switch (proto) { 148 case IPPROTO_SCTP: /* fallthru */ 149 case IPPROTO_TCP: pt = pt_tcp; break; 150 case IPPROTO_UDP: pt = pt_udp; break; 151 default: return (NULL); 152 } 153 154 for (p = pt; p->pt_num; p++) { 155 if (port == p->pt_num) 156 return (p->pt_short); 157 } 158 return (NULL); 159 } 160 161 int 162 reservedport(int proto, int port) 163 { 164 const struct porttable *p, *pt; 165 166 switch (proto) { 167 case IPPROTO_TCP: pt = pt_tcp; break; 168 case IPPROTO_UDP: pt = pt_udp; break; 169 default: return (0); 170 } 171 for (p = pt; p->pt_num; p++) { 172 if (port == p->pt_num) 173 return (1); 174 } 175 return (0); 176 } 177 178 /* 179 * Need to be able to register an 180 * interpreter for transient ports. 181 * See TFTP interpreter. 182 */ 183 #define MAXTRANS 64 184 static struct ttable transients [MAXTRANS]; 185 186 int 187 add_transient(int port, int (*proc)(int, void *, int)) 188 { 189 static struct ttable *next = transients; 190 191 next->t_port = port; 192 next->t_proc = proc; 193 194 if (++next >= &transients[MAXTRANS]) 195 next = transients; 196 197 return (1); 198 } 199 200 struct ttable * 201 is_transient(int port) 202 { 203 struct ttable *p; 204 205 for (p = transients; p->t_port && p < &transients[MAXTRANS]; p++) { 206 if (port == p->t_port) 207 return (p); 208 } 209 210 return (NULL); 211 } 212 213 void 214 del_transient(int port) 215 { 216 struct ttable *p; 217 218 for (p = transients; p->t_port && p < &transients[MAXTRANS]; p++) { 219 if (port == p->t_port) 220 p->t_port = -1; 221 } 222 } 223 224 static void 225 interpret_syslog(int flags, char dir, int port, const char *syslogstr, 226 int dlen) 227 { 228 static const char *pris[] = { 229 "emerg", "alert", "crit", "error", "warn", "notice", "info", "debug" 230 }; 231 static const char *facs[] = { 232 "kern", "user", "mail", "daemon", "auth", "syslog", "lpr", "news", 233 "uucp", NULL, NULL, NULL, NULL, "audit", NULL, "cron", "local0", 234 "local1", "local2", "local3", "local4", "local5", "local6", "local7" 235 }; 236 237 int composit; 238 int pri = -1; 239 int facil = -1; 240 boolean_t bogus = B_TRUE; 241 int priostrlen = 0; 242 int datalen = dlen; 243 char unknown[4]; /* for unrecognized ones */ 244 const char *facilstr = "BAD"; 245 const char *pristr = "FMT"; 246 const char *data = syslogstr; 247 248 /* 249 * Is there enough data to interpret (left bracket + at least 3 chars 250 * which could be digits, right bracket, or space)? 251 */ 252 if (datalen >= 4 && data != NULL) { 253 if (*data == '<') { 254 const int FACS_LEN = sizeof (facs) / sizeof (facs[0]); 255 char buffer[4]; 256 char *end; 257 258 data++; 259 datalen--; 260 261 (void) strlcpy(buffer, data, sizeof (buffer)); 262 composit = strtoul(buffer, &end, 0); 263 data += end - buffer; 264 if (*data == '>') { 265 data++; 266 datalen -= end - buffer + 1; 267 268 pri = composit & 0x7; 269 facil = (composit & 0xF8) >> 3; 270 271 if ((facil >= FACS_LEN) || 272 (facs[facil] == NULL)) { 273 snprintf(unknown, sizeof (unknown), 274 "%d", facil); 275 facilstr = unknown; 276 } else { 277 facilstr = facs[facil]; 278 } 279 pristr = pris[pri]; 280 priostrlen = dlen - datalen; 281 bogus = B_FALSE; 282 } else { 283 data = syslogstr; 284 datalen = dlen; 285 } 286 } 287 } 288 289 if (flags & F_SUM) { 290 (void) snprintf(get_sum_line(), MAXLINE, 291 "SYSLOG %c port=%d %s.%s: %s", 292 dir, port, facilstr, pristr, 293 show_string(syslogstr, dlen, 20)); 294 295 } 296 297 if (flags & F_DTAIL) { 298 static char syslog[] = "SYSLOG: "; 299 show_header(syslog, syslog, dlen); 300 show_space(); 301 (void) snprintf(get_detail_line(0, 0), MAXLINE, 302 "%s%sPriority: %.*s%s(%s.%s)", prot_nest_prefix, syslog, 303 priostrlen, syslogstr, bogus ? "" : " ", 304 facilstr, pristr); 305 (void) snprintf(get_line(0, 0), get_line_remain(), 306 "\"%s\"", 307 show_string(syslogstr, dlen, 60)); 308 show_trailer(); 309 } 310 } 311 312 int src_port, dst_port, curr_proto; 313 314 int 315 interpret_reserved(int flags, int proto, in_port_t src, in_port_t dst, 316 char *data, int dlen) 317 { 318 const char *pn; 319 int dir, port, which; 320 char pbuff[16], hbuff[32]; 321 struct ttable *ttabp; 322 323 src_port = src; 324 dst_port = dst; 325 curr_proto = proto; 326 327 pn = getportname(proto, src); 328 if (pn != NULL) { 329 dir = 'R'; 330 port = dst; 331 which = src; 332 } else { 333 pn = getportname(proto, dst); 334 if (pn == NULL) { 335 ttabp = is_transient(src); 336 if (ttabp) { 337 (ttabp->t_proc)(flags, data, dlen); 338 return (1); 339 } 340 ttabp = is_transient(dst); 341 if (ttabp) { 342 (ttabp->t_proc)(flags, data, dlen); 343 return (1); 344 } 345 return (0); 346 } 347 348 dir = 'C'; 349 port = src; 350 which = dst; 351 } 352 353 if ((dst == IPPORT_DOMAIN || src == IPPORT_DOMAIN || 354 dst == IPPORT_MDNS || src == IPPORT_MDNS) && 355 proto != IPPROTO_TCP) { 356 interpret_dns(flags, proto, (uchar_t *)data, dlen, which); 357 return (1); 358 } 359 360 if (dst == IPPORT_SYSLOG && proto != IPPROTO_TCP) { 361 /* 362 * TCP port 514 is rshell. UDP port 514 is syslog. 363 */ 364 interpret_syslog(flags, dir, port, (const char *)data, dlen); 365 return (1); 366 } 367 368 if (dlen > 0) { 369 switch (which) { 370 case IPPORT_BOOTPS: 371 case IPPORT_BOOTPC: 372 (void) interpret_dhcp(flags, (struct dhcp *)data, 373 dlen); 374 return (1); 375 case IPPORT_DHCPV6S: 376 case IPPORT_DHCPV6C: 377 (void) interpret_dhcpv6(flags, (uint8_t *)data, dlen); 378 return (1); 379 case IPPORT_TFTP: 380 (void) interpret_tftp(flags, (struct tftphdr *)data, 381 dlen); 382 return (1); 383 case IPPORT_HTTP: 384 case IPPORT_HTTP_ALT: 385 (void) interpret_http(flags, data, dlen); 386 return (1); 387 case IPPORT_NTP: 388 (void) interpret_ntp(flags, (struct ntpdata *)data, 389 dlen); 390 return (1); 391 case IPPORT_NETBIOS_NS: 392 interpret_netbios_ns(flags, (uchar_t *)data, dlen); 393 return (1); 394 case IPPORT_NETBIOS_DGM: 395 interpret_netbios_datagram(flags, (uchar_t *)data, 396 dlen); 397 return (1); 398 case IPPORT_NETBIOS_SSN: 399 case 445: 400 /* 401 * SMB on port 445 is a subset of NetBIOS SMB 402 * on port 139. The same interpreter can be used 403 * for both. 404 */ 405 interpret_netbios_ses(flags, (uchar_t *)data, dlen); 406 return (1); 407 case IPPORT_LDAP: 408 interpret_ldap(flags, data, dlen, src, dst); 409 return (1); 410 case IPPORT_SLP: 411 interpret_slp(flags, data, dlen); 412 return (1); 413 case IPPORT_MIP: 414 interpret_mip_cntrlmsg(flags, (uchar_t *)data, dlen); 415 return (1); 416 case IPPORT_ROUTESERVER: 417 (void) interpret_rip(flags, (struct rip *)data, dlen); 418 return (1); 419 case IPPORT_RIPNG: 420 (void) interpret_rip6(flags, (struct rip6 *)data, 421 dlen); 422 return (1); 423 case IPPORT_SOCKS: 424 if (dir == 'C') 425 (void) interpret_socks_call(flags, data, dlen); 426 else 427 (void) interpret_socks_reply(flags, data, 428 dlen); 429 return (1); 430 case IPPORT_VXLAN: 431 (void) interpret_vxlan(flags, data, dlen); 432 return (1); 433 } 434 } 435 436 if (flags & F_SUM) { 437 (void) snprintf(get_sum_line(), MAXLINE, 438 "%s %c port=%d %s", 439 pn, dir, port, 440 show_string(data, dlen, 20)); 441 } 442 443 if (flags & F_DTAIL) { 444 (void) snprintf(pbuff, sizeof (pbuff), "%s: ", pn); 445 (void) snprintf(hbuff, sizeof (hbuff), "%s: ", pn); 446 show_header(pbuff, hbuff, dlen); 447 show_space(); 448 (void) snprintf(get_line(0, 0), get_line_remain(), 449 "\"%s\"", 450 show_string(data, dlen, 60)); 451 show_trailer(); 452 } 453 return (1); 454 } 455