ipmon.c revision 145519
1/* $FreeBSD: head/contrib/ipfilter/tools/ipmon.c 145519 2005-04-25 18:20:15Z darrenr $ */ 2 3/* 4 * Copyright (C) 1993-2001, 2003 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 */ 8#ifndef SOLARIS 9#define SOLARIS (defined(__SVR4) || defined(__svr4__)) && defined(sun) 10#endif 11 12#include <sys/types.h> 13#include <sys/stat.h> 14#include <sys/param.h> 15#include <sys/file.h> 16#include <sys/time.h> 17#define _KERNEL 18#include <sys/uio.h> 19#undef _KERNEL 20#include <sys/socket.h> 21#include <sys/ioctl.h> 22 23#include <stdio.h> 24#include <unistd.h> 25#include <string.h> 26#include <fcntl.h> 27#include <errno.h> 28#include <time.h> 29#if !defined(__SVR4) && !defined(__svr4__) 30# if (__FreeBSD_version >= 300000) 31# include <sys/dirent.h> 32# else 33# include <sys/dir.h> 34# endif 35#else 36# include <sys/filio.h> 37# include <sys/byteorder.h> 38#endif 39#if !defined(__hpux) && (!defined(__SVR4) && !defined(__GNUC__)) 40# include <strings.h> 41#endif 42#include <signal.h> 43#include <stdlib.h> 44#include <stddef.h> 45#include <netinet/in.h> 46#include <netinet/in_systm.h> 47#include <net/if.h> 48#include <netinet/ip.h> 49#if !defined(__hpux) && !defined(linux) 50# include <netinet/tcp_fsm.h> 51#endif 52#include <netdb.h> 53#include <arpa/inet.h> 54#include <arpa/nameser.h> 55#ifdef __hpux 56# undef NOERROR 57#endif 58#include <resolv.h> 59 60#if !defined(linux) 61# include <sys/protosw.h> 62# include <netinet/ip_var.h> 63#endif 64 65#include <netinet/tcp.h> 66#include <netinet/ip_icmp.h> 67 68#include <ctype.h> 69#include <syslog.h> 70 71#include "netinet/ip_compat.h" 72#include <netinet/tcpip.h> 73#include "netinet/ip_fil.h" 74#include "netinet/ip_nat.h" 75#include "netinet/ip_state.h" 76#include "netinet/ip_proxy.h" 77#include "ipmon.h" 78 79#if !defined(lint) 80static const char sccsid[] = "@(#)ipmon.c 1.21 6/5/96 (C)1993-2000 Darren Reed"; 81static const char rcsid[] = "@(#)Id: ipmon.c,v 1.33.2.8 2004/12/09 19:41:26 darrenr Exp"; 82#endif 83 84 85#if defined(sun) && !defined(SOLARIS2) 86#define STRERROR(x) sys_errlist[x] 87extern char *sys_errlist[]; 88#else 89#define STRERROR(x) strerror(x) 90#endif 91 92 93struct flags { 94 int value; 95 char flag; 96}; 97 98 99typedef struct icmp_subtype { 100 int ist_val; 101 char *ist_name; 102} icmp_subtype_t; 103 104typedef struct icmp_type { 105 int it_val; 106 struct icmp_subtype *it_subtable; 107 size_t it_stsize; 108 char *it_name; 109} icmp_type_t; 110 111 112#define IST_SZ(x) (sizeof(x)/sizeof(icmp_subtype_t)) 113 114 115struct flags tcpfl[] = { 116 { TH_ACK, 'A' }, 117 { TH_RST, 'R' }, 118 { TH_SYN, 'S' }, 119 { TH_FIN, 'F' }, 120 { TH_URG, 'U' }, 121 { TH_PUSH,'P' }, 122 { TH_ECN, 'E' }, 123 { TH_CWR, 'C' }, 124 { 0, '\0' } 125}; 126 127#ifdef MENTAT 128static char *pidfile = "/etc/opt/ipf/ipmon.pid"; 129#else 130# if BSD >= 199306 131static char *pidfile = "/var/run/ipmon.pid"; 132# else 133static char *pidfile = "/etc/ipmon.pid"; 134# endif 135#endif 136 137static char line[2048]; 138static int opts = 0; 139static char *logfile = NULL; 140static FILE *binarylog = NULL; 141static char *binarylogfile = NULL; 142static int donehup = 0; 143static void usage __P((char *)); 144static void handlehup __P((int)); 145static void flushlogs __P((char *, FILE *)); 146static void print_log __P((int, FILE *, char *, int)); 147static void print_ipflog __P((FILE *, char *, int)); 148static void print_natlog __P((FILE *, char *, int)); 149static void print_statelog __P((FILE *, char *, int)); 150static int read_log __P((int, int *, char *, int)); 151static void write_pid __P((char *)); 152static char *icmpname __P((u_int, u_int)); 153static char *icmpname6 __P((u_int, u_int)); 154static icmp_type_t *find_icmptype __P((int, icmp_type_t *, size_t)); 155static icmp_subtype_t *find_icmpsubtype __P((int, icmp_subtype_t *, size_t)); 156#ifdef __hpux 157static struct tm *get_tm __P((u_32_t)); 158#else 159static struct tm *get_tm __P((time_t)); 160#endif 161 162char *hostname __P((int, int, u_32_t *)); 163char *portname __P((int, char *, u_int)); 164int main __P((int, char *[])); 165 166static void logopts __P((int, char *)); 167static void init_tabs __P((void)); 168static char *getproto __P((u_int)); 169 170static char **protocols = NULL; 171static char **udp_ports = NULL; 172static char **tcp_ports = NULL; 173static char *conf_file = NULL; 174 175 176#define OPT_SYSLOG 0x001 177#define OPT_RESOLVE 0x002 178#define OPT_HEXBODY 0x004 179#define OPT_VERBOSE 0x008 180#define OPT_HEXHDR 0x010 181#define OPT_TAIL 0x020 182#define OPT_NAT 0x080 183#define OPT_STATE 0x100 184#define OPT_FILTER 0x200 185#define OPT_PORTNUM 0x400 186#define OPT_LOGALL (OPT_NAT|OPT_STATE|OPT_FILTER) 187#define OPT_LOGBODY 0x800 188 189#define HOSTNAME_V4(a,b) hostname((a), 4, (u_32_t *)&(b)) 190 191#ifndef LOGFAC 192#define LOGFAC LOG_LOCAL0 193#endif 194 195 196static icmp_subtype_t icmpunreachnames[] = { 197 { ICMP_UNREACH_NET, "net" }, 198 { ICMP_UNREACH_HOST, "host" }, 199 { ICMP_UNREACH_PROTOCOL, "protocol" }, 200 { ICMP_UNREACH_PORT, "port" }, 201 { ICMP_UNREACH_NEEDFRAG, "needfrag" }, 202 { ICMP_UNREACH_SRCFAIL, "srcfail" }, 203 { ICMP_UNREACH_NET_UNKNOWN, "net_unknown" }, 204 { ICMP_UNREACH_HOST_UNKNOWN, "host_unknown" }, 205 { ICMP_UNREACH_NET, "isolated" }, 206 { ICMP_UNREACH_NET_PROHIB, "net_prohib" }, 207 { ICMP_UNREACH_NET_PROHIB, "host_prohib" }, 208 { ICMP_UNREACH_TOSNET, "tosnet" }, 209 { ICMP_UNREACH_TOSHOST, "toshost" }, 210 { ICMP_UNREACH_ADMIN_PROHIBIT, "admin_prohibit" }, 211 { -2, NULL } 212}; 213 214static icmp_subtype_t redirectnames[] = { 215 { ICMP_REDIRECT_NET, "net" }, 216 { ICMP_REDIRECT_HOST, "host" }, 217 { ICMP_REDIRECT_TOSNET, "tosnet" }, 218 { ICMP_REDIRECT_TOSHOST, "toshost" }, 219 { -2, NULL } 220}; 221 222static icmp_subtype_t timxceednames[] = { 223 { ICMP_TIMXCEED_INTRANS, "transit" }, 224 { ICMP_TIMXCEED_REASS, "reassem" }, 225 { -2, NULL } 226}; 227 228static icmp_subtype_t paramnames[] = { 229 { ICMP_PARAMPROB_ERRATPTR, "errata_pointer" }, 230 { ICMP_PARAMPROB_OPTABSENT, "optmissing" }, 231 { ICMP_PARAMPROB_LENGTH, "length" }, 232 { -2, NULL } 233}; 234 235static icmp_type_t icmptypes[] = { 236 { ICMP_ECHOREPLY, NULL, 0, "echoreply" }, 237 { -1, NULL, 0, NULL }, 238 { -1, NULL, 0, NULL }, 239 { ICMP_UNREACH, icmpunreachnames, 240 IST_SZ(icmpunreachnames),"unreach" }, 241 { ICMP_SOURCEQUENCH, NULL, 0, "sourcequench" }, 242 { ICMP_REDIRECT, redirectnames, 243 IST_SZ(redirectnames), "redirect" }, 244 { -1, NULL, 0, NULL }, 245 { -1, NULL, 0, NULL }, 246 { ICMP_ECHO, NULL, 0, "echo" }, 247 { ICMP_ROUTERADVERT, NULL, 0, "routeradvert" }, 248 { ICMP_ROUTERSOLICIT, NULL, 0, "routersolicit" }, 249 { ICMP_TIMXCEED, timxceednames, 250 IST_SZ(timxceednames), "timxceed" }, 251 { ICMP_PARAMPROB, paramnames, 252 IST_SZ(paramnames), "paramprob" }, 253 { ICMP_TSTAMP, NULL, 0, "timestamp" }, 254 { ICMP_TSTAMPREPLY, NULL, 0, "timestampreply" }, 255 { ICMP_IREQ, NULL, 0, "inforeq" }, 256 { ICMP_IREQREPLY, NULL, 0, "inforeply" }, 257 { ICMP_MASKREQ, NULL, 0, "maskreq" }, 258 { ICMP_MASKREPLY, NULL, 0, "maskreply" }, 259 { -2, NULL, 0, NULL } 260}; 261 262static icmp_subtype_t icmpredirect6[] = { 263 { ICMP6_DST_UNREACH_NOROUTE, "noroute" }, 264 { ICMP6_DST_UNREACH_ADMIN, "admin" }, 265 { ICMP6_DST_UNREACH_NOTNEIGHBOR, "neighbour" }, 266 { ICMP6_DST_UNREACH_ADDR, "address" }, 267 { ICMP6_DST_UNREACH_NOPORT, "noport" }, 268 { -2, NULL } 269}; 270 271static icmp_subtype_t icmptimexceed6[] = { 272 { ICMP6_TIME_EXCEED_TRANSIT, "intransit" }, 273 { ICMP6_TIME_EXCEED_REASSEMBLY, "reassem" }, 274 { -2, NULL } 275}; 276 277static icmp_subtype_t icmpparamprob6[] = { 278 { ICMP6_PARAMPROB_HEADER, "header" }, 279 { ICMP6_PARAMPROB_NEXTHEADER, "nextheader" }, 280 { ICMP6_PARAMPROB_OPTION, "option" }, 281 { -2, NULL } 282}; 283 284static icmp_subtype_t icmpquerysubject6[] = { 285 { ICMP6_NI_SUBJ_IPV6, "ipv6" }, 286 { ICMP6_NI_SUBJ_FQDN, "fqdn" }, 287 { ICMP6_NI_SUBJ_IPV4, "ipv4" }, 288 { -2, NULL }, 289}; 290 291static icmp_subtype_t icmpnodeinfo6[] = { 292 { ICMP6_NI_SUCCESS, "success" }, 293 { ICMP6_NI_REFUSED, "refused" }, 294 { ICMP6_NI_UNKNOWN, "unknown" }, 295 { -2, NULL } 296}; 297 298static icmp_subtype_t icmprenumber6[] = { 299 { ICMP6_ROUTER_RENUMBERING_COMMAND, "command" }, 300 { ICMP6_ROUTER_RENUMBERING_RESULT, "result" }, 301 { ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET, "seqnum_reset" }, 302 { -2, NULL } 303}; 304 305static icmp_type_t icmptypes6[] = { 306 { 0, NULL, 0, NULL }, 307 { ICMP6_DST_UNREACH, icmpredirect6, 308 IST_SZ(icmpredirect6), "unreach" }, 309 { ICMP6_PACKET_TOO_BIG, NULL, 0, "toobig" }, 310 { ICMP6_TIME_EXCEEDED, icmptimexceed6, 311 IST_SZ(icmptimexceed6), "timxceed" }, 312 { ICMP6_PARAM_PROB, icmpparamprob6, 313 IST_SZ(icmpparamprob6), "paramprob" }, 314 { ICMP6_ECHO_REQUEST, NULL, 0, "echo" }, 315 { ICMP6_ECHO_REPLY, NULL, 0, "echoreply" }, 316 { ICMP6_MEMBERSHIP_QUERY, icmpquerysubject6, 317 IST_SZ(icmpquerysubject6), "groupmemberquery" }, 318 { ICMP6_MEMBERSHIP_REPORT,NULL, 0, "groupmemberreport" }, 319 { ICMP6_MEMBERSHIP_REDUCTION,NULL, 0, "groupmemberterm" }, 320 { ND_ROUTER_SOLICIT, NULL, 0, "routersolicit" }, 321 { ND_ROUTER_ADVERT, NULL, 0, "routeradvert" }, 322 { ND_NEIGHBOR_SOLICIT, NULL, 0, "neighborsolicit" }, 323 { ND_NEIGHBOR_ADVERT, NULL, 0, "neighboradvert" }, 324 { ND_REDIRECT, NULL, 0, "redirect" }, 325 { ICMP6_ROUTER_RENUMBERING, icmprenumber6, 326 IST_SZ(icmprenumber6), "routerrenumber" }, 327 { ICMP6_WRUREQUEST, NULL, 0, "whoareyourequest" }, 328 { ICMP6_WRUREPLY, NULL, 0, "whoareyoureply" }, 329 { ICMP6_FQDN_QUERY, NULL, 0, "fqdnquery" }, 330 { ICMP6_FQDN_REPLY, NULL, 0, "fqdnreply" }, 331 { ICMP6_NI_QUERY, icmpnodeinfo6, 332 IST_SZ(icmpnodeinfo6), "nodeinforequest" }, 333 { ICMP6_NI_REPLY, NULL, 0, "nodeinforeply" }, 334 { MLD6_MTRACE_RESP, NULL, 0, "mtraceresponse" }, 335 { MLD6_MTRACE, NULL, 0, "mtracerequest" }, 336 { -2, NULL, 0, NULL } 337}; 338 339static icmp_subtype_t *find_icmpsubtype(type, table, tablesz) 340int type; 341icmp_subtype_t *table; 342size_t tablesz; 343{ 344 icmp_subtype_t *ist; 345 int i; 346 347 if (tablesz < 2) 348 return NULL; 349 350 if ((type < 0) || (type > table[tablesz - 2].ist_val)) 351 return NULL; 352 353 i = type; 354 if (table[type].ist_val == type) 355 return table + type; 356 357 for (i = 0, ist = table; ist->ist_val != -2; i++, ist++) 358 if (ist->ist_val == type) 359 return ist; 360 return NULL; 361} 362 363 364static icmp_type_t *find_icmptype(type, table, tablesz) 365int type; 366icmp_type_t *table; 367size_t tablesz; 368{ 369 icmp_type_t *it; 370 int i; 371 372 if (tablesz < 2) 373 return NULL; 374 375 if ((type < 0) || (type > table[tablesz - 2].it_val)) 376 return NULL; 377 378 i = type; 379 if (table[type].it_val == type) 380 return table + type; 381 382 for (i = 0, it = table; it->it_val != -2; i++, it++) 383 if (it->it_val == type) 384 return it; 385 return NULL; 386} 387 388 389static void handlehup(sig) 390int sig; 391{ 392 signal(SIGHUP, handlehup); 393 donehup = 1; 394} 395 396 397static void init_tabs() 398{ 399 struct protoent *p; 400 struct servent *s; 401 char *name, **tab; 402 int port, i; 403 404 if (protocols != NULL) { 405 for (i = 0; i < 256; i++) 406 if (protocols[i] != NULL) { 407 free(protocols[i]); 408 protocols[i] = NULL; 409 } 410 free(protocols); 411 protocols = NULL; 412 } 413 protocols = (char **)malloc(256 * sizeof(*protocols)); 414 if (protocols != NULL) { 415 bzero((char *)protocols, 256 * sizeof(*protocols)); 416 417 setprotoent(1); 418 while ((p = getprotoent()) != NULL) 419 if (p->p_proto >= 0 && p->p_proto <= 255 && 420 p->p_name != NULL && protocols[p->p_proto] == NULL) 421 protocols[p->p_proto] = strdup(p->p_name); 422 endprotoent(); 423 } 424 425 if (udp_ports != NULL) { 426 for (i = 0; i < 65536; i++) 427 if (udp_ports[i] != NULL) { 428 free(udp_ports[i]); 429 udp_ports[i] = NULL; 430 } 431 free(udp_ports); 432 udp_ports = NULL; 433 } 434 udp_ports = (char **)malloc(65536 * sizeof(*udp_ports)); 435 if (udp_ports != NULL) 436 bzero((char *)udp_ports, 65536 * sizeof(*udp_ports)); 437 438 if (tcp_ports != NULL) { 439 for (i = 0; i < 65536; i++) 440 if (tcp_ports[i] != NULL) { 441 free(tcp_ports[i]); 442 tcp_ports[i] = NULL; 443 } 444 free(tcp_ports); 445 tcp_ports = NULL; 446 } 447 tcp_ports = (char **)malloc(65536 * sizeof(*tcp_ports)); 448 if (tcp_ports != NULL) 449 bzero((char *)tcp_ports, 65536 * sizeof(*tcp_ports)); 450 451 setservent(1); 452 while ((s = getservent()) != NULL) { 453 if (s->s_proto == NULL) 454 continue; 455 else if (!strcmp(s->s_proto, "tcp")) { 456 port = ntohs(s->s_port); 457 name = s->s_name; 458 tab = tcp_ports; 459 } else if (!strcmp(s->s_proto, "udp")) { 460 port = ntohs(s->s_port); 461 name = s->s_name; 462 tab = udp_ports; 463 } else 464 continue; 465 if ((port < 0 || port > 65535) || (name == NULL)) 466 continue; 467 if (tab != NULL) 468 tab[port] = strdup(name); 469 } 470 endservent(); 471} 472 473 474static char *getproto(p) 475u_int p; 476{ 477 static char pnum[4]; 478 char *s; 479 480 p &= 0xff; 481 s = protocols ? protocols[p] : NULL; 482 if (s == NULL) { 483 sprintf(pnum, "%u", p); 484 s = pnum; 485 } 486 return s; 487} 488 489 490static int read_log(fd, lenp, buf, bufsize) 491int fd, bufsize, *lenp; 492char *buf; 493{ 494 int nr; 495 496 nr = read(fd, buf, bufsize); 497 if (!nr) 498 return 2; 499 if ((nr < 0) && (errno != EINTR)) 500 return -1; 501 *lenp = nr; 502 return 0; 503} 504 505 506char *hostname(res, v, ip) 507int res, v; 508u_32_t *ip; 509{ 510# define MAX_INETA 16 511 static char hname[MAXHOSTNAMELEN + MAX_INETA + 3]; 512#ifdef USE_INET6 513 static char hostbuf[MAXHOSTNAMELEN+1]; 514#endif 515 struct hostent *hp; 516 struct in_addr ipa; 517 518 if (v == 4) { 519 ipa.s_addr = *ip; 520 if (!res) 521 return inet_ntoa(ipa); 522 hp = gethostbyaddr((char *)ip, sizeof(*ip), AF_INET); 523 if (!hp) 524 return inet_ntoa(ipa); 525 sprintf(hname, "%.*s[%s]", MAXHOSTNAMELEN, hp->h_name, 526 inet_ntoa(ipa)); 527 return hname; 528 } 529#ifdef USE_INET6 530 (void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1); 531 hostbuf[MAXHOSTNAMELEN] = '\0'; 532 return hostbuf; 533#else 534 return "IPv6"; 535#endif 536} 537 538 539char *portname(res, proto, port) 540int res; 541char *proto; 542u_int port; 543{ 544 static char pname[8]; 545 char *s; 546 547 port = ntohs(port); 548 port &= 0xffff; 549 (void) sprintf(pname, "%u", port); 550 if (!res || (opts & OPT_PORTNUM)) 551 return pname; 552 s = NULL; 553 if (!strcmp(proto, "tcp")) 554 s = tcp_ports[port]; 555 else if (!strcmp(proto, "udp")) 556 s = udp_ports[port]; 557 if (s == NULL) 558 s = pname; 559 return s; 560} 561 562 563static char *icmpname(type, code) 564u_int type; 565u_int code; 566{ 567 static char name[80]; 568 icmp_subtype_t *ist; 569 icmp_type_t *it; 570 char *s; 571 572 s = NULL; 573 it = find_icmptype(type, icmptypes, sizeof(icmptypes) / sizeof(*it)); 574 if (it != NULL) 575 s = it->it_name; 576 577 if (s == NULL) 578 sprintf(name, "icmptype(%d)/", type); 579 else 580 sprintf(name, "%s/", s); 581 582 ist = NULL; 583 if (it != NULL && it->it_subtable != NULL) 584 ist = find_icmpsubtype(code, it->it_subtable, it->it_stsize); 585 586 if (ist != NULL && ist->ist_name != NULL) 587 strcat(name, ist->ist_name); 588 else 589 sprintf(name + strlen(name), "%d", code); 590 591 return name; 592} 593 594static char *icmpname6(type, code) 595u_int type; 596u_int code; 597{ 598 static char name[80]; 599 icmp_subtype_t *ist; 600 icmp_type_t *it; 601 char *s; 602 603 s = NULL; 604 it = find_icmptype(type, icmptypes6, sizeof(icmptypes6) / sizeof(*it)); 605 if (it != NULL) 606 s = it->it_name; 607 608 if (s == NULL) 609 sprintf(name, "icmpv6type(%d)/", type); 610 else 611 sprintf(name, "%s/", s); 612 613 ist = NULL; 614 if (it != NULL && it->it_subtable != NULL) 615 ist = find_icmpsubtype(code, it->it_subtable, it->it_stsize); 616 617 if (ist != NULL && ist->ist_name != NULL) 618 strcat(name, ist->ist_name); 619 else 620 sprintf(name + strlen(name), "%d", code); 621 622 return name; 623} 624 625 626void dumphex(log, dopts, buf, len) 627FILE *log; 628int dopts; 629char *buf; 630int len; 631{ 632 char hline[80]; 633 int i, j, k; 634 u_char *s = (u_char *)buf, *t = (u_char *)hline; 635 636 if (buf == NULL || len == 0) 637 return; 638 639 *hline = '\0'; 640 641 for (i = len, j = 0; i; i--, j++, s++) { 642 if (j && !(j & 0xf)) { 643 *t++ = '\n'; 644 *t = '\0'; 645 if (!(dopts & OPT_SYSLOG)) 646 fputs(hline, log); 647 else 648 syslog(LOG_INFO, "%s", hline); 649 t = (u_char *)hline; 650 *t = '\0'; 651 } 652 sprintf((char *)t, "%02x", *s & 0xff); 653 t += 2; 654 if (!((j + 1) & 0xf)) { 655 s -= 15; 656 sprintf((char *)t, " "); 657 t += 8; 658 for (k = 16; k; k--, s++) 659 *t++ = (ISPRINT(*s) ? *s : '.'); 660 s--; 661 } 662 663 if ((j + 1) & 0xf) 664 *t++ = ' ';; 665 } 666 667 if (j & 0xf) { 668 for (k = 16 - (j & 0xf); k; k--) { 669 *t++ = ' '; 670 *t++ = ' '; 671 *t++ = ' '; 672 } 673 sprintf((char *)t, " "); 674 t += 7; 675 s -= j & 0xf; 676 for (k = j & 0xf; k; k--, s++) 677 *t++ = (ISPRINT(*s) ? *s : '.'); 678 *t++ = '\n'; 679 *t = '\0'; 680 } 681 if (!(dopts & OPT_SYSLOG)) { 682 fputs(hline, log); 683 fflush(log); 684 } else 685 syslog(LOG_INFO, "%s", hline); 686} 687 688 689static struct tm *get_tm(sec) 690#ifdef __hpux 691u_32_t sec; 692#else 693time_t sec; 694#endif 695{ 696 struct tm *tm; 697 time_t t; 698 699 t = sec; 700 tm = localtime(&t); 701 return tm; 702} 703 704static void print_natlog(log, buf, blen) 705FILE *log; 706char *buf; 707int blen; 708{ 709 struct natlog *nl; 710 iplog_t *ipl = (iplog_t *)buf; 711 char *t = line; 712 struct tm *tm; 713 int res, i, len; 714 char *proto; 715 716 nl = (struct natlog *)((char *)ipl + sizeof(*ipl)); 717 res = (opts & OPT_RESOLVE) ? 1 : 0; 718 tm = get_tm(ipl->ipl_sec); 719 len = sizeof(line); 720 if (!(opts & OPT_SYSLOG)) { 721 (void) strftime(t, len, "%d/%m/%Y ", tm); 722 i = strlen(t); 723 len -= i; 724 t += i; 725 } 726 (void) strftime(t, len, "%T", tm); 727 t += strlen(t); 728 (void) sprintf(t, ".%-.6ld @%hd ", ipl->ipl_usec, nl->nl_rule + 1); 729 t += strlen(t); 730 731 if (nl->nl_type == NL_NEWMAP) 732 strcpy(t, "NAT:MAP "); 733 else if (nl->nl_type == NL_NEWRDR) 734 strcpy(t, "NAT:RDR "); 735 else if (nl->nl_type == NL_FLUSH) 736 strcpy(t, "NAT:FLUSH "); 737 else if (nl->nl_type == NL_EXPIRE) 738 strcpy(t, "NAT:EXPIRE "); 739 else if (nl->nl_type == NL_NEWBIMAP) 740 strcpy(t, "NAT:BIMAP "); 741 else if (nl->nl_type == NL_NEWBLOCK) 742 strcpy(t, "NAT:MAPBLOCK "); 743 else if (nl->nl_type == NL_CLONE) 744 strcpy(t, "NAT:CLONE "); 745 else 746 sprintf(t, "Type: %d ", nl->nl_type); 747 t += strlen(t); 748 749 proto = getproto(nl->nl_p); 750 751 (void) sprintf(t, "%s,%s <- -> ", HOSTNAME_V4(res, nl->nl_inip), 752 portname(res, proto, (u_int)nl->nl_inport)); 753 t += strlen(t); 754 (void) sprintf(t, "%s,%s ", HOSTNAME_V4(res, nl->nl_outip), 755 portname(res, proto, (u_int)nl->nl_outport)); 756 t += strlen(t); 757 (void) sprintf(t, "[%s,%s]", HOSTNAME_V4(res, nl->nl_origip), 758 portname(res, proto, (u_int)nl->nl_origport)); 759 t += strlen(t); 760 if (nl->nl_type == NL_EXPIRE) { 761#ifdef USE_QUAD_T 762 (void) sprintf(t, " Pkts %qd/%qd Bytes %qd/%qd", 763 (long long)nl->nl_pkts[0], 764 (long long)nl->nl_pkts[1], 765 (long long)nl->nl_bytes[0], 766 (long long)nl->nl_bytes[1]); 767#else 768 (void) sprintf(t, " Pkts %ld/%ld Bytes %ld/%ld", 769 nl->nl_pkts[0], nl->nl_pkts[1], 770 nl->nl_bytes[0], nl->nl_bytes[1]); 771#endif 772 t += strlen(t); 773 } 774 775 *t++ = '\n'; 776 *t++ = '\0'; 777 if (opts & OPT_SYSLOG) 778 syslog(LOG_INFO, "%s", line); 779 else 780 (void) fprintf(log, "%s", line); 781} 782 783 784static void print_statelog(log, buf, blen) 785FILE *log; 786char *buf; 787int blen; 788{ 789 struct ipslog *sl; 790 iplog_t *ipl = (iplog_t *)buf; 791 char *t = line, *proto; 792 struct tm *tm; 793 int res, i, len; 794 795 sl = (struct ipslog *)((char *)ipl + sizeof(*ipl)); 796 res = (opts & OPT_RESOLVE) ? 1 : 0; 797 tm = get_tm(ipl->ipl_sec); 798 len = sizeof(line); 799 if (!(opts & OPT_SYSLOG)) { 800 (void) strftime(t, len, "%d/%m/%Y ", tm); 801 i = strlen(t); 802 len -= i; 803 t += i; 804 } 805 (void) strftime(t, len, "%T", tm); 806 t += strlen(t); 807 (void) sprintf(t, ".%-.6ld ", ipl->ipl_usec); 808 t += strlen(t); 809 810 if (sl->isl_type == ISL_NEW) 811 strcpy(t, "STATE:NEW "); 812 else if (sl->isl_type == ISL_CLONE) 813 strcpy(t, "STATE:CLONED "); 814 else if (sl->isl_type == ISL_EXPIRE) { 815 if ((sl->isl_p == IPPROTO_TCP) && 816 (sl->isl_state[0] > IPF_TCPS_ESTABLISHED || 817 sl->isl_state[1] > IPF_TCPS_ESTABLISHED)) 818 strcpy(t, "STATE:CLOSE "); 819 else 820 strcpy(t, "STATE:EXPIRE "); 821 } else if (sl->isl_type == ISL_FLUSH) 822 strcpy(t, "STATE:FLUSH "); 823 else if (sl->isl_type == ISL_INTERMEDIATE) 824 strcpy(t, "STATE:INTERMEDIATE "); 825 else if (sl->isl_type == ISL_REMOVE) 826 strcpy(t, "STATE:REMOVE "); 827 else if (sl->isl_type == ISL_KILLED) 828 strcpy(t, "STATE:KILLED "); 829 else 830 sprintf(t, "Type: %d ", sl->isl_type); 831 t += strlen(t); 832 833 proto = getproto(sl->isl_p); 834 835 if (sl->isl_p == IPPROTO_TCP || sl->isl_p == IPPROTO_UDP) { 836 (void) sprintf(t, "%s,%s -> ", 837 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src), 838 portname(res, proto, (u_int)sl->isl_sport)); 839 t += strlen(t); 840 (void) sprintf(t, "%s,%s PR %s", 841 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 842 portname(res, proto, (u_int)sl->isl_dport), proto); 843 } else if (sl->isl_p == IPPROTO_ICMP) { 844 (void) sprintf(t, "%s -> ", hostname(res, sl->isl_v, 845 (u_32_t *)&sl->isl_src)); 846 t += strlen(t); 847 (void) sprintf(t, "%s PR icmp %d", 848 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 849 sl->isl_itype); 850 } else if (sl->isl_p == IPPROTO_ICMPV6) { 851 (void) sprintf(t, "%s -> ", hostname(res, sl->isl_v, 852 (u_32_t *)&sl->isl_src)); 853 t += strlen(t); 854 (void) sprintf(t, "%s PR icmpv6 %d", 855 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 856 sl->isl_itype); 857 } else { 858 (void) sprintf(t, "%s -> ", 859 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src)); 860 t += strlen(t); 861 (void) sprintf(t, "%s PR %s", 862 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 863 proto); 864 } 865 t += strlen(t); 866 if (sl->isl_tag != FR_NOLOGTAG) { 867 (void) sprintf(t, " tag %u", sl->isl_tag); 868 t += strlen(t); 869 } 870 if (sl->isl_type != ISL_NEW) { 871 sprintf(t, 872#ifdef USE_QUAD_T 873#ifdef PRId64 874 " Forward: Pkts in %" PRId64 " Bytes in %" PRId64 875 " Pkts out %" PRId64 " Bytes out %" PRId64 876 " Backward: Pkts in %" PRId64 " Bytes in %" PRId64 877 " Pkts out %" PRId64 " Bytes out %" PRId64, 878#else 879 " Forward: Pkts in %qd Bytes in %qd Pkts out %qd Bytes out %qd Backward: Pkts in %qd Bytes in %qd Pkts out %qd Bytes out %qd", 880#endif /* PRId64 */ 881#else 882 " Forward: Pkts in %ld Bytes in %ld Pkts out %ld Bytes out %ld Backward: Pkts in %ld Bytes in %ld Pkts out %ld Bytes out %ld", 883#endif 884 sl->isl_pkts[0], sl->isl_bytes[0], 885 sl->isl_pkts[1], sl->isl_bytes[1], 886 sl->isl_pkts[2], sl->isl_bytes[2], 887 sl->isl_pkts[3], sl->isl_bytes[3]); 888 889 t += strlen(t); 890 } 891 892 *t++ = '\n'; 893 *t++ = '\0'; 894 if (opts & OPT_SYSLOG) 895 syslog(LOG_INFO, "%s", line); 896 else 897 (void) fprintf(log, "%s", line); 898} 899 900 901static void print_log(logtype, log, buf, blen) 902FILE *log; 903char *buf; 904int logtype, blen; 905{ 906 iplog_t *ipl; 907 char *bp = NULL, *bpo = NULL; 908 int psize; 909 910 while (blen > 0) { 911 ipl = (iplog_t *)buf; 912 if ((u_long)ipl & (sizeof(long)-1)) { 913 if (bp) 914 bpo = bp; 915 bp = (char *)malloc(blen); 916 bcopy((char *)ipl, bp, blen); 917 if (bpo) { 918 free(bpo); 919 bpo = NULL; 920 } 921 buf = bp; 922 continue; 923 } 924 925 psize = ipl->ipl_dsize; 926 if (psize > blen) 927 break; 928 929 if (binarylog) { 930 fwrite(buf, psize, 1, binarylog); 931 fflush(binarylog); 932 } 933 934 if (logtype == IPL_LOGIPF) { 935 if (ipl->ipl_magic == IPL_MAGIC) 936 print_ipflog(log, buf, psize); 937 938 } else if (logtype == IPL_LOGNAT) { 939 if (ipl->ipl_magic == IPL_MAGIC_NAT) 940 print_natlog(log, buf, psize); 941 942 } else if (logtype == IPL_LOGSTATE) { 943 if (ipl->ipl_magic == IPL_MAGIC_STATE) 944 print_statelog(log, buf, psize); 945 } 946 947 blen -= psize; 948 buf += psize; 949 } 950 if (bp) 951 free(bp); 952 return; 953} 954 955 956static void print_ipflog(log, buf, blen) 957FILE *log; 958char *buf; 959int blen; 960{ 961 tcphdr_t *tp; 962 struct icmp *ic; 963 struct icmp *icmp; 964 struct tm *tm; 965 char *t, *proto; 966 int i, v, lvl, res, len, off, plen, ipoff, defaction; 967 ip_t *ipc, *ip; 968 u_32_t *s, *d; 969 u_short hl, p; 970 ipflog_t *ipf; 971 iplog_t *ipl; 972#ifdef USE_INET6 973 ip6_t *ip6; 974#endif 975 976 ipl = (iplog_t *)buf; 977 ipf = (ipflog_t *)((char *)buf + sizeof(*ipl)); 978 ip = (ip_t *)((char *)ipf + sizeof(*ipf)); 979 v = IP_V(ip); 980 res = (opts & OPT_RESOLVE) ? 1 : 0; 981 t = line; 982 *t = '\0'; 983 tm = get_tm(ipl->ipl_sec); 984 985 len = sizeof(line); 986 if (!(opts & OPT_SYSLOG)) { 987 (void) strftime(t, len, "%d/%m/%Y ", tm); 988 i = strlen(t); 989 len -= i; 990 t += i; 991 } 992 (void) strftime(t, len, "%T", tm); 993 t += strlen(t); 994 (void) sprintf(t, ".%-.6ld ", ipl->ipl_usec); 995 t += strlen(t); 996 if (ipl->ipl_count > 1) { 997 (void) sprintf(t, "%dx ", ipl->ipl_count); 998 t += strlen(t); 999 } 1000#if (defined(MENTAT) || \ 1001 (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 1002 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) || \ 1003 (defined(OpenBSD) && (OpenBSD >= 199603))) || defined(linux) 1004 { 1005 char ifname[sizeof(ipf->fl_ifname) + 1]; 1006 1007 strncpy(ifname, ipf->fl_ifname, sizeof(ipf->fl_ifname)); 1008 ifname[sizeof(ipf->fl_ifname)] = '\0'; 1009 (void) sprintf(t, "%s", ifname); 1010 t += strlen(t); 1011# if defined(MENTAT) || defined(linux) 1012 if (ISALPHA(*(t - 1))) { 1013 sprintf(t, "%d", ipf->fl_unit); 1014 t += strlen(t); 1015 } 1016# endif 1017 } 1018#else 1019 for (len = 0; len < 3; len++) 1020 if (ipf->fl_ifname[len] == '\0') 1021 break; 1022 if (ipf->fl_ifname[len]) 1023 len++; 1024 (void) sprintf(t, "%*.*s%u", len, len, ipf->fl_ifname, ipf->fl_unit); 1025 t += strlen(t); 1026#endif 1027#ifdef __sgi 1028 if ((ipf->fl_group[0] == 255) && (ipf->fl_group[1] == '\0')) 1029#else 1030 if ((ipf->fl_group[0] == -1) && (ipf->fl_group[1] == '\0')) 1031#endif 1032 strcat(t, " @-1:"); 1033 else if (ipf->fl_group[0] == '\0') 1034 (void) strcpy(t, " @0:"); 1035 else 1036 (void) sprintf(t, " @%s:", ipf->fl_group); 1037 t += strlen(t); 1038 if (ipf->fl_rule == 0xffffffff) 1039 strcat(t, "-1 "); 1040 else 1041 (void) sprintf(t, "%u ", ipf->fl_rule + 1); 1042 t += strlen(t); 1043 1044 lvl = LOG_NOTICE; 1045 1046 if (ipf->fl_lflags & FI_SHORT) { 1047 *t++ = 'S'; 1048 lvl = LOG_ERR; 1049 } 1050 1051 if (FR_ISPASS(ipf->fl_flags)) { 1052 if (ipf->fl_flags & FR_LOGP) 1053 *t++ = 'p'; 1054 else 1055 *t++ = 'P'; 1056 } else if (FR_ISBLOCK(ipf->fl_flags)) { 1057 if (ipf->fl_flags & FR_LOGB) 1058 *t++ = 'b'; 1059 else 1060 *t++ = 'B'; 1061 lvl = LOG_WARNING; 1062 } else if ((ipf->fl_flags & FR_LOGMASK) == FR_LOG) { 1063 *t++ = 'L'; 1064 lvl = LOG_INFO; 1065 } else if (ipf->fl_flags & FF_LOGNOMATCH) { 1066 *t++ = 'n'; 1067 } else { 1068 *t++ = '?'; 1069 lvl = LOG_EMERG; 1070 } 1071 if (ipf->fl_loglevel != 0xffff) 1072 lvl = ipf->fl_loglevel; 1073 *t++ = ' '; 1074 *t = '\0'; 1075 1076 if (v == 6) { 1077#ifdef USE_INET6 1078 off = 0; 1079 ipoff = 0; 1080 hl = sizeof(ip6_t); 1081 ip6 = (ip6_t *)ip; 1082 p = (u_short)ip6->ip6_nxt; 1083 s = (u_32_t *)&ip6->ip6_src; 1084 d = (u_32_t *)&ip6->ip6_dst; 1085 plen = hl + ntohs(ip6->ip6_plen); 1086#else 1087 sprintf(t, "ipv6"); 1088 goto printipflog; 1089#endif 1090 } else if (v == 4) { 1091 hl = IP_HL(ip) << 2; 1092 ipoff = ip->ip_off; 1093 off = ipoff & IP_OFFMASK; 1094 p = (u_short)ip->ip_p; 1095 s = (u_32_t *)&ip->ip_src; 1096 d = (u_32_t *)&ip->ip_dst; 1097 plen = ip->ip_len; 1098 } else { 1099 goto printipflog; 1100 } 1101 proto = getproto(p); 1102 1103 if ((p == IPPROTO_TCP || p == IPPROTO_UDP) && !off) { 1104 tp = (tcphdr_t *)((char *)ip + hl); 1105 if (!(ipf->fl_lflags & FI_SHORT)) { 1106 (void) sprintf(t, "%s,%s -> ", hostname(res, v, s), 1107 portname(res, proto, (u_int)tp->th_sport)); 1108 t += strlen(t); 1109 (void) sprintf(t, "%s,%s PR %s len %hu %hu", 1110 hostname(res, v, d), 1111 portname(res, proto, (u_int)tp->th_dport), 1112 proto, hl, plen); 1113 t += strlen(t); 1114 1115 if (p == IPPROTO_TCP) { 1116 *t++ = ' '; 1117 *t++ = '-'; 1118 for (i = 0; tcpfl[i].value; i++) 1119 if (tp->th_flags & tcpfl[i].value) 1120 *t++ = tcpfl[i].flag; 1121 if (opts & OPT_VERBOSE) { 1122 (void) sprintf(t, " %lu %lu %hu", 1123 (u_long)(ntohl(tp->th_seq)), 1124 (u_long)(ntohl(tp->th_ack)), 1125 ntohs(tp->th_win)); 1126 t += strlen(t); 1127 } 1128 } 1129 *t = '\0'; 1130 } else { 1131 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1132 t += strlen(t); 1133 (void) sprintf(t, "%s PR %s len %hu %hu", 1134 hostname(res, v, d), proto, hl, plen); 1135 } 1136 } else if ((p == IPPROTO_ICMPV6) && !off && (v == 6)) { 1137 ic = (struct icmp *)((char *)ip + hl); 1138 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1139 t += strlen(t); 1140 (void) sprintf(t, "%s PR icmpv6 len %hu %hu icmpv6 %s", 1141 hostname(res, v, d), hl, plen, 1142 icmpname6(ic->icmp_type, ic->icmp_code)); 1143 } else if ((p == IPPROTO_ICMP) && !off && (v == 4)) { 1144 ic = (struct icmp *)((char *)ip + hl); 1145 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1146 t += strlen(t); 1147 (void) sprintf(t, "%s PR icmp len %hu %hu icmp %s", 1148 hostname(res, v, d), hl, plen, 1149 icmpname(ic->icmp_type, ic->icmp_code)); 1150 if (ic->icmp_type == ICMP_UNREACH || 1151 ic->icmp_type == ICMP_SOURCEQUENCH || 1152 ic->icmp_type == ICMP_PARAMPROB || 1153 ic->icmp_type == ICMP_REDIRECT || 1154 ic->icmp_type == ICMP_TIMXCEED) { 1155 ipc = &ic->icmp_ip; 1156 i = ntohs(ipc->ip_len); 1157 /* 1158 * XXX - try to guess endian of ip_len in ICMP 1159 * returned data. 1160 */ 1161 if (i > 1500) 1162 i = ipc->ip_len; 1163 ipoff = ntohs(ipc->ip_off); 1164 proto = getproto(ipc->ip_p); 1165 1166 if (!(ipoff & IP_OFFMASK) && 1167 ((ipc->ip_p == IPPROTO_TCP) || 1168 (ipc->ip_p == IPPROTO_UDP))) { 1169 tp = (tcphdr_t *)((char *)ipc + hl); 1170 t += strlen(t); 1171 (void) sprintf(t, " for %s,%s -", 1172 HOSTNAME_V4(res, ipc->ip_src), 1173 portname(res, proto, 1174 (u_int)tp->th_sport)); 1175 t += strlen(t); 1176 (void) sprintf(t, " %s,%s PR %s len %hu %hu", 1177 HOSTNAME_V4(res, ipc->ip_dst), 1178 portname(res, proto, 1179 (u_int)tp->th_dport), 1180 proto, IP_HL(ipc) << 2, i); 1181 } else if (!(ipoff & IP_OFFMASK) && 1182 (ipc->ip_p == IPPROTO_ICMP)) { 1183 icmp = (icmphdr_t *)((char *)ipc + hl); 1184 1185 t += strlen(t); 1186 (void) sprintf(t, " for %s -", 1187 HOSTNAME_V4(res, ipc->ip_src)); 1188 t += strlen(t); 1189 (void) sprintf(t, 1190 " %s PR icmp len %hu %hu icmp %d/%d", 1191 HOSTNAME_V4(res, ipc->ip_dst), 1192 IP_HL(ipc) << 2, i, 1193 icmp->icmp_type, icmp->icmp_code); 1194 } else { 1195 t += strlen(t); 1196 (void) sprintf(t, " for %s -", 1197 HOSTNAME_V4(res, ipc->ip_src)); 1198 t += strlen(t); 1199 (void) sprintf(t, " %s PR %s len %hu (%hu)", 1200 HOSTNAME_V4(res, ipc->ip_dst), proto, 1201 IP_HL(ipc) << 2, i); 1202 t += strlen(t); 1203 if (ipoff & IP_OFFMASK) { 1204 (void) sprintf(t, 1205 "(frag %d:%hu@%hu%s%s)", 1206 ntohs(ipc->ip_id), 1207 i - (IP_HL(ipc) << 2), 1208 (ipoff & IP_OFFMASK) << 3, 1209 ipoff & IP_MF ? "+" : "", 1210 ipoff & IP_DF ? "-" : ""); 1211 } 1212 } 1213 1214 } 1215 } else { 1216 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1217 t += strlen(t); 1218 (void) sprintf(t, "%s PR %s len %hu (%hu)", 1219 hostname(res, v, d), proto, hl, plen); 1220 t += strlen(t); 1221 if (off & IP_OFFMASK) 1222 (void) sprintf(t, " (frag %d:%hu@%hu%s%s)", 1223 ntohs(ip->ip_id), 1224 plen - hl, (off & IP_OFFMASK) << 3, 1225 ipoff & IP_MF ? "+" : "", 1226 ipoff & IP_DF ? "-" : ""); 1227 } 1228 t += strlen(t); 1229 1230printipflog: 1231 if (ipf->fl_flags & FR_KEEPSTATE) { 1232 (void) strcpy(t, " K-S"); 1233 t += strlen(t); 1234 } 1235 1236 if (ipf->fl_flags & FR_KEEPFRAG) { 1237 (void) strcpy(t, " K-F"); 1238 t += strlen(t); 1239 } 1240 1241 if (ipf->fl_dir == 0) 1242 strcpy(t, " IN"); 1243 else if (ipf->fl_dir == 1) 1244 strcpy(t, " OUT"); 1245 t += strlen(t); 1246 if (ipf->fl_logtag != 0) { 1247 sprintf(t, " log-tag %d", ipf->fl_logtag); 1248 t += strlen(t); 1249 } 1250 if (ipf->fl_nattag.ipt_num[0] != 0) { 1251 strcpy(t, " nat-tag "); 1252 t += strlen(t); 1253 strncpy(t, ipf->fl_nattag.ipt_tag, sizeof(ipf->fl_nattag)); 1254 t += strlen(t); 1255 } 1256 if ((ipf->fl_lflags & FI_LOWTTL) != 0) { 1257 strcpy(t, " low-ttl"); 1258 t += 8; 1259 } 1260 if ((ipf->fl_lflags & FI_OOW) != 0) { 1261 strcpy(t, " OOW"); 1262 t += 4; 1263 } 1264 if ((ipf->fl_lflags & FI_BAD) != 0) { 1265 strcpy(t, " bad"); 1266 t += 4; 1267 } 1268 if ((ipf->fl_lflags & FI_NATED) != 0) { 1269 strcpy(t, " NAT"); 1270 t += 4; 1271 } 1272 if ((ipf->fl_lflags & FI_BADNAT) != 0) { 1273 strcpy(t, " bad-NAT"); 1274 t += 8; 1275 } 1276 if ((ipf->fl_lflags & FI_BADSRC) != 0) { 1277 strcpy(t, " bad-src"); 1278 t += 8; 1279 } 1280 if ((ipf->fl_lflags & FI_MULTICAST) != 0) { 1281 strcpy(t, " multicast"); 1282 t += 10; 1283 } 1284 if ((ipf->fl_lflags & FI_BROADCAST) != 0) { 1285 strcpy(t, " broadcast"); 1286 t += 10; 1287 } 1288 if ((ipf->fl_lflags & (FI_MULTICAST|FI_BROADCAST|FI_MBCAST)) == 1289 FI_MBCAST) { 1290 strcpy(t, " mbcast"); 1291 t += 7; 1292 } 1293 *t++ = '\n'; 1294 *t++ = '\0'; 1295 defaction = 0; 1296 if (conf_file != NULL) 1297 defaction = check_action(buf, line, opts, lvl); 1298 if (defaction == 0) { 1299 if (opts & OPT_SYSLOG) 1300 syslog(lvl, "%s", line); 1301 else 1302 (void) fprintf(log, "%s", line); 1303 if (opts & OPT_HEXHDR) 1304 dumphex(log, opts, buf, 1305 sizeof(iplog_t) + sizeof(*ipf)); 1306 if (opts & OPT_HEXBODY) 1307 dumphex(log, opts, (char *)ip, 1308 ipf->fl_plen + ipf->fl_hlen); 1309 else if ((opts & OPT_LOGBODY) && (ipf->fl_flags & FR_LOGBODY)) 1310 dumphex(log, opts, (char *)ip + ipf->fl_hlen, 1311 ipf->fl_plen); 1312 } 1313} 1314 1315 1316static void usage(prog) 1317char *prog; 1318{ 1319 fprintf(stderr, "%s: [-NFhstvxX] [-f <logfile>]\n", prog); 1320 exit(1); 1321} 1322 1323 1324static void write_pid(file) 1325char *file; 1326{ 1327 FILE *fp = NULL; 1328 int fd; 1329 1330 if ((fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0644)) >= 0) { 1331 fp = fdopen(fd, "w"); 1332 if (fp == NULL) { 1333 close(fd); 1334 fprintf(stderr, 1335 "unable to open/create pid file: %s\n", file); 1336 return; 1337 } 1338 fprintf(fp, "%d", getpid()); 1339 fclose(fp); 1340 } 1341} 1342 1343 1344static void flushlogs(file, log) 1345char *file; 1346FILE *log; 1347{ 1348 int fd, flushed = 0; 1349 1350 if ((fd = open(file, O_RDWR)) == -1) { 1351 (void) fprintf(stderr, "%s: open: %s\n", 1352 file, STRERROR(errno)); 1353 exit(1); 1354 } 1355 1356 if (ioctl(fd, SIOCIPFFB, &flushed) == 0) { 1357 printf("%d bytes flushed from log buffer\n", 1358 flushed); 1359 fflush(stdout); 1360 } else 1361 perror("SIOCIPFFB"); 1362 (void) close(fd); 1363 1364 if (flushed) { 1365 if (opts & OPT_SYSLOG) 1366 syslog(LOG_INFO, "%d bytes flushed from log\n", 1367 flushed); 1368 else if (log != stdout) 1369 fprintf(log, "%d bytes flushed from log\n", flushed); 1370 } 1371} 1372 1373 1374static void logopts(turnon, options) 1375int turnon; 1376char *options; 1377{ 1378 int flags = 0; 1379 char *s; 1380 1381 for (s = options; *s; s++) 1382 { 1383 switch (*s) 1384 { 1385 case 'N' : 1386 flags |= OPT_NAT; 1387 break; 1388 case 'S' : 1389 flags |= OPT_STATE; 1390 break; 1391 case 'I' : 1392 flags |= OPT_FILTER; 1393 break; 1394 default : 1395 fprintf(stderr, "Unknown log option %c\n", *s); 1396 exit(1); 1397 } 1398 } 1399 1400 if (turnon) 1401 opts |= flags; 1402 else 1403 opts &= ~(flags); 1404} 1405 1406 1407int main(argc, argv) 1408int argc; 1409char *argv[]; 1410{ 1411 struct stat sb; 1412 FILE *log = stdout; 1413 FILE *fp; 1414 int fd[3], doread, n, i; 1415 int tr, nr, regular[3], c; 1416 int fdt[3], devices = 0, make_daemon = 0; 1417 char buf[DEFAULT_IPFLOGSIZE], *iplfile[3], *s; 1418 extern int optind; 1419 extern char *optarg; 1420 1421 fd[0] = fd[1] = fd[2] = -1; 1422 fdt[0] = fdt[1] = fdt[2] = -1; 1423 iplfile[0] = IPL_NAME; 1424 iplfile[1] = IPNAT_NAME; 1425 iplfile[2] = IPSTATE_NAME; 1426 1427 while ((c = getopt(argc, argv, "?abB:C:Df:FhnN:o:O:pP:sS:tvxX")) != -1) 1428 switch (c) 1429 { 1430 case 'a' : 1431 opts |= OPT_LOGALL; 1432 fdt[0] = IPL_LOGIPF; 1433 fdt[1] = IPL_LOGNAT; 1434 fdt[2] = IPL_LOGSTATE; 1435 break; 1436 case 'b' : 1437 opts |= OPT_LOGBODY; 1438 break; 1439 case 'B' : 1440 binarylogfile = optarg; 1441 binarylog = fopen(optarg, "a"); 1442 break; 1443 case 'C' : 1444 conf_file = optarg; 1445 break; 1446 case 'D' : 1447 make_daemon = 1; 1448 break; 1449 case 'f' : case 'I' : 1450 opts |= OPT_FILTER; 1451 fdt[0] = IPL_LOGIPF; 1452 iplfile[0] = optarg; 1453 break; 1454 case 'F' : 1455 flushlogs(iplfile[0], log); 1456 flushlogs(iplfile[1], log); 1457 flushlogs(iplfile[2], log); 1458 break; 1459 case 'n' : 1460 opts |= OPT_RESOLVE; 1461 break; 1462 case 'N' : 1463 opts |= OPT_NAT; 1464 fdt[1] = IPL_LOGNAT; 1465 iplfile[1] = optarg; 1466 break; 1467 case 'o' : case 'O' : 1468 logopts(c == 'o', optarg); 1469 fdt[0] = fdt[1] = fdt[2] = -1; 1470 if (opts & OPT_FILTER) 1471 fdt[0] = IPL_LOGIPF; 1472 if (opts & OPT_NAT) 1473 fdt[1] = IPL_LOGNAT; 1474 if (opts & OPT_STATE) 1475 fdt[2] = IPL_LOGSTATE; 1476 break; 1477 case 'p' : 1478 opts |= OPT_PORTNUM; 1479 break; 1480 case 'P' : 1481 pidfile = optarg; 1482 break; 1483 case 's' : 1484 s = strrchr(argv[0], '/'); 1485 if (s == NULL) 1486 s = argv[0]; 1487 else 1488 s++; 1489 openlog(s, LOG_NDELAY|LOG_PID, LOGFAC); 1490 s = NULL; 1491 opts |= OPT_SYSLOG; 1492 log = NULL; 1493 break; 1494 case 'S' : 1495 opts |= OPT_STATE; 1496 fdt[2] = IPL_LOGSTATE; 1497 iplfile[2] = optarg; 1498 break; 1499 case 't' : 1500 opts |= OPT_TAIL; 1501 break; 1502 case 'v' : 1503 opts |= OPT_VERBOSE; 1504 break; 1505 case 'x' : 1506 opts |= OPT_HEXBODY; 1507 break; 1508 case 'X' : 1509 opts |= OPT_HEXHDR; 1510 break; 1511 default : 1512 case 'h' : 1513 case '?' : 1514 usage(argv[0]); 1515 } 1516 1517 init_tabs(); 1518 if (conf_file) 1519 if (load_config(conf_file) == -1) 1520 exit(1); 1521 1522 /* 1523 * Default action is to only open the filter log file. 1524 */ 1525 if ((fdt[0] == -1) && (fdt[1] == -1) && (fdt[2] == -1)) 1526 fdt[0] = IPL_LOGIPF; 1527 1528 for (i = 0; i < 3; i++) { 1529 if (fdt[i] == -1) 1530 continue; 1531 if (!strcmp(iplfile[i], "-")) 1532 fd[i] = 0; 1533 else { 1534 if ((fd[i] = open(iplfile[i], O_RDONLY)) == -1) { 1535 (void) fprintf(stderr, 1536 "%s: open: %s\n", iplfile[i], 1537 STRERROR(errno)); 1538 exit(1); 1539 /* NOTREACHED */ 1540 } 1541 if (fstat(fd[i], &sb) == -1) { 1542 (void) fprintf(stderr, "%d: fstat: %s\n", 1543 fd[i], STRERROR(errno)); 1544 exit(1); 1545 /* NOTREACHED */ 1546 } 1547 if (!(regular[i] = !S_ISCHR(sb.st_mode))) 1548 devices++; 1549 } 1550 } 1551 1552 if (!(opts & OPT_SYSLOG)) { 1553 logfile = argv[optind]; 1554 log = logfile ? fopen(logfile, "a") : stdout; 1555 if (log == NULL) { 1556 (void) fprintf(stderr, "%s: fopen: %s\n", 1557 argv[optind], STRERROR(errno)); 1558 exit(1); 1559 /* NOTREACHED */ 1560 } 1561 setvbuf(log, NULL, _IONBF, 0); 1562 } else 1563 log = NULL; 1564 1565 if (make_daemon && ((log != stdout) || (opts & OPT_SYSLOG))) { 1566#if BSD >= 199306 1567 daemon(0, !(opts & OPT_SYSLOG)); 1568#else 1569 int pid; 1570 if ((pid = fork()) > 0) 1571 exit(0); 1572 if (pid < 0) { 1573 (void) fprintf(stderr, "%s: fork() failed: %s\n", 1574 argv[0], STRERROR(errno)); 1575 exit(1); 1576 /* NOTREACHED */ 1577 } 1578 setsid(); 1579 if ((opts & OPT_SYSLOG)) 1580 close(2); 1581#endif /* !BSD */ 1582 close(0); 1583 close(1); 1584 } 1585 write_pid(pidfile); 1586 1587 signal(SIGHUP, handlehup); 1588 1589 for (doread = 1; doread; ) { 1590 nr = 0; 1591 1592 for (i = 0; i < 3; i++) { 1593 tr = 0; 1594 if (fdt[i] == -1) 1595 continue; 1596 if (!regular[i]) { 1597 if (ioctl(fd[i], FIONREAD, &tr) == -1) { 1598 if (opts & OPT_SYSLOG) 1599 syslog(LOG_CRIT, 1600 "ioctl(FIONREAD): %m"); 1601 else 1602 perror("ioctl(FIONREAD)"); 1603 exit(1); 1604 /* NOTREACHED */ 1605 } 1606 } else { 1607 tr = (lseek(fd[i], 0, SEEK_CUR) < sb.st_size); 1608 if (!tr && !(opts & OPT_TAIL)) 1609 doread = 0; 1610 } 1611 if (!tr) 1612 continue; 1613 nr += tr; 1614 1615 tr = read_log(fd[i], &n, buf, sizeof(buf)); 1616 if (donehup) { 1617 if (logfile && (fp = fopen(logfile, "a"))) { 1618 fclose(log); 1619 log = fp; 1620 } 1621 if (binarylogfile && (fp = fopen(binarylogfile, "a"))) { 1622 fclose(binarylog); 1623 binarylog = fp; 1624 } 1625 init_tabs(); 1626 if (conf_file != NULL) 1627 load_config(conf_file); 1628 donehup = 0; 1629 } 1630 1631 switch (tr) 1632 { 1633 case -1 : 1634 if (opts & OPT_SYSLOG) 1635 syslog(LOG_CRIT, "read: %m\n"); 1636 else 1637 perror("read"); 1638 doread = 0; 1639 break; 1640 case 1 : 1641 if (opts & OPT_SYSLOG) 1642 syslog(LOG_CRIT, "aborting logging\n"); 1643 else 1644 fprintf(log, "aborting logging\n"); 1645 doread = 0; 1646 break; 1647 case 2 : 1648 break; 1649 case 0 : 1650 if (n > 0) { 1651 print_log(fdt[i], log, buf, n); 1652 if (!(opts & OPT_SYSLOG)) 1653 fflush(log); 1654 } 1655 break; 1656 } 1657 } 1658 if (!nr && ((opts & OPT_TAIL) || devices)) 1659 sleep(1); 1660 } 1661 return(0); 1662 /* NOTREACHED */ 1663} 1664