ipmon.c revision 170268
1/* $FreeBSD: head/contrib/ipfilter/tools/ipmon.c 170268 2007-06-04 02:54:36Z darrenr $ */ 2 3/* 4 * Copyright (C) 2001-2006 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 1.33.2.18 2007/05/27 11:12:12 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 194int logfac = LOGFAC; 195 196 197static icmp_subtype_t icmpunreachnames[] = { 198 { ICMP_UNREACH_NET, "net" }, 199 { ICMP_UNREACH_HOST, "host" }, 200 { ICMP_UNREACH_PROTOCOL, "protocol" }, 201 { ICMP_UNREACH_PORT, "port" }, 202 { ICMP_UNREACH_NEEDFRAG, "needfrag" }, 203 { ICMP_UNREACH_SRCFAIL, "srcfail" }, 204 { ICMP_UNREACH_NET_UNKNOWN, "net_unknown" }, 205 { ICMP_UNREACH_HOST_UNKNOWN, "host_unknown" }, 206 { ICMP_UNREACH_NET, "isolated" }, 207 { ICMP_UNREACH_NET_PROHIB, "net_prohib" }, 208 { ICMP_UNREACH_NET_PROHIB, "host_prohib" }, 209 { ICMP_UNREACH_TOSNET, "tosnet" }, 210 { ICMP_UNREACH_TOSHOST, "toshost" }, 211 { ICMP_UNREACH_ADMIN_PROHIBIT, "admin_prohibit" }, 212 { -2, NULL } 213}; 214 215static icmp_subtype_t redirectnames[] = { 216 { ICMP_REDIRECT_NET, "net" }, 217 { ICMP_REDIRECT_HOST, "host" }, 218 { ICMP_REDIRECT_TOSNET, "tosnet" }, 219 { ICMP_REDIRECT_TOSHOST, "toshost" }, 220 { -2, NULL } 221}; 222 223static icmp_subtype_t timxceednames[] = { 224 { ICMP_TIMXCEED_INTRANS, "transit" }, 225 { ICMP_TIMXCEED_REASS, "reassem" }, 226 { -2, NULL } 227}; 228 229static icmp_subtype_t paramnames[] = { 230 { ICMP_PARAMPROB_ERRATPTR, "errata_pointer" }, 231 { ICMP_PARAMPROB_OPTABSENT, "optmissing" }, 232 { ICMP_PARAMPROB_LENGTH, "length" }, 233 { -2, NULL } 234}; 235 236static icmp_type_t icmptypes[] = { 237 { ICMP_ECHOREPLY, NULL, 0, "echoreply" }, 238 { -1, NULL, 0, NULL }, 239 { -1, NULL, 0, NULL }, 240 { ICMP_UNREACH, icmpunreachnames, 241 IST_SZ(icmpunreachnames),"unreach" }, 242 { ICMP_SOURCEQUENCH, NULL, 0, "sourcequench" }, 243 { ICMP_REDIRECT, redirectnames, 244 IST_SZ(redirectnames), "redirect" }, 245 { -1, NULL, 0, NULL }, 246 { -1, NULL, 0, NULL }, 247 { ICMP_ECHO, NULL, 0, "echo" }, 248 { ICMP_ROUTERADVERT, NULL, 0, "routeradvert" }, 249 { ICMP_ROUTERSOLICIT, NULL, 0, "routersolicit" }, 250 { ICMP_TIMXCEED, timxceednames, 251 IST_SZ(timxceednames), "timxceed" }, 252 { ICMP_PARAMPROB, paramnames, 253 IST_SZ(paramnames), "paramprob" }, 254 { ICMP_TSTAMP, NULL, 0, "timestamp" }, 255 { ICMP_TSTAMPREPLY, NULL, 0, "timestampreply" }, 256 { ICMP_IREQ, NULL, 0, "inforeq" }, 257 { ICMP_IREQREPLY, NULL, 0, "inforeply" }, 258 { ICMP_MASKREQ, NULL, 0, "maskreq" }, 259 { ICMP_MASKREPLY, NULL, 0, "maskreply" }, 260 { -2, NULL, 0, NULL } 261}; 262 263static icmp_subtype_t icmpredirect6[] = { 264 { ICMP6_DST_UNREACH_NOROUTE, "noroute" }, 265 { ICMP6_DST_UNREACH_ADMIN, "admin" }, 266 { ICMP6_DST_UNREACH_NOTNEIGHBOR, "neighbour" }, 267 { ICMP6_DST_UNREACH_ADDR, "address" }, 268 { ICMP6_DST_UNREACH_NOPORT, "noport" }, 269 { -2, NULL } 270}; 271 272static icmp_subtype_t icmptimexceed6[] = { 273 { ICMP6_TIME_EXCEED_TRANSIT, "intransit" }, 274 { ICMP6_TIME_EXCEED_REASSEMBLY, "reassem" }, 275 { -2, NULL } 276}; 277 278static icmp_subtype_t icmpparamprob6[] = { 279 { ICMP6_PARAMPROB_HEADER, "header" }, 280 { ICMP6_PARAMPROB_NEXTHEADER, "nextheader" }, 281 { ICMP6_PARAMPROB_OPTION, "option" }, 282 { -2, NULL } 283}; 284 285static icmp_subtype_t icmpquerysubject6[] = { 286 { ICMP6_NI_SUBJ_IPV6, "ipv6" }, 287 { ICMP6_NI_SUBJ_FQDN, "fqdn" }, 288 { ICMP6_NI_SUBJ_IPV4, "ipv4" }, 289 { -2, NULL }, 290}; 291 292static icmp_subtype_t icmpnodeinfo6[] = { 293 { ICMP6_NI_SUCCESS, "success" }, 294 { ICMP6_NI_REFUSED, "refused" }, 295 { ICMP6_NI_UNKNOWN, "unknown" }, 296 { -2, NULL } 297}; 298 299static icmp_subtype_t icmprenumber6[] = { 300 { ICMP6_ROUTER_RENUMBERING_COMMAND, "command" }, 301 { ICMP6_ROUTER_RENUMBERING_RESULT, "result" }, 302 { ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET, "seqnum_reset" }, 303 { -2, NULL } 304}; 305 306static icmp_type_t icmptypes6[] = { 307 { 0, NULL, 0, NULL }, 308 { ICMP6_DST_UNREACH, icmpredirect6, 309 IST_SZ(icmpredirect6), "unreach" }, 310 { ICMP6_PACKET_TOO_BIG, NULL, 0, "toobig" }, 311 { ICMP6_TIME_EXCEEDED, icmptimexceed6, 312 IST_SZ(icmptimexceed6), "timxceed" }, 313 { ICMP6_PARAM_PROB, icmpparamprob6, 314 IST_SZ(icmpparamprob6), "paramprob" }, 315 { ICMP6_ECHO_REQUEST, NULL, 0, "echo" }, 316 { ICMP6_ECHO_REPLY, NULL, 0, "echoreply" }, 317 { ICMP6_MEMBERSHIP_QUERY, icmpquerysubject6, 318 IST_SZ(icmpquerysubject6), "groupmemberquery" }, 319 { ICMP6_MEMBERSHIP_REPORT,NULL, 0, "groupmemberreport" }, 320 { ICMP6_MEMBERSHIP_REDUCTION,NULL, 0, "groupmemberterm" }, 321 { ND_ROUTER_SOLICIT, NULL, 0, "routersolicit" }, 322 { ND_ROUTER_ADVERT, NULL, 0, "routeradvert" }, 323 { ND_NEIGHBOR_SOLICIT, NULL, 0, "neighborsolicit" }, 324 { ND_NEIGHBOR_ADVERT, NULL, 0, "neighboradvert" }, 325 { ND_REDIRECT, NULL, 0, "redirect" }, 326 { ICMP6_ROUTER_RENUMBERING, icmprenumber6, 327 IST_SZ(icmprenumber6), "routerrenumber" }, 328 { ICMP6_WRUREQUEST, NULL, 0, "whoareyourequest" }, 329 { ICMP6_WRUREPLY, NULL, 0, "whoareyoureply" }, 330 { ICMP6_FQDN_QUERY, NULL, 0, "fqdnquery" }, 331 { ICMP6_FQDN_REPLY, NULL, 0, "fqdnreply" }, 332 { ICMP6_NI_QUERY, icmpnodeinfo6, 333 IST_SZ(icmpnodeinfo6), "nodeinforequest" }, 334 { ICMP6_NI_REPLY, NULL, 0, "nodeinforeply" }, 335 { MLD6_MTRACE_RESP, NULL, 0, "mtraceresponse" }, 336 { MLD6_MTRACE, NULL, 0, "mtracerequest" }, 337 { -2, NULL, 0, NULL } 338}; 339 340static icmp_subtype_t *find_icmpsubtype(type, table, tablesz) 341int type; 342icmp_subtype_t *table; 343size_t tablesz; 344{ 345 icmp_subtype_t *ist; 346 int i; 347 348 if (tablesz < 2) 349 return NULL; 350 351 if ((type < 0) || (type > table[tablesz - 2].ist_val)) 352 return NULL; 353 354 i = type; 355 if (table[type].ist_val == type) 356 return table + type; 357 358 for (i = 0, ist = table; ist->ist_val != -2; i++, ist++) 359 if (ist->ist_val == type) 360 return ist; 361 return NULL; 362} 363 364 365static icmp_type_t *find_icmptype(type, table, tablesz) 366int type; 367icmp_type_t *table; 368size_t tablesz; 369{ 370 icmp_type_t *it; 371 int i; 372 373 if (tablesz < 2) 374 return NULL; 375 376 if ((type < 0) || (type > table[tablesz - 2].it_val)) 377 return NULL; 378 379 i = type; 380 if (table[type].it_val == type) 381 return table + type; 382 383 for (i = 0, it = table; it->it_val != -2; i++, it++) 384 if (it->it_val == type) 385 return it; 386 return NULL; 387} 388 389 390static void handlehup(sig) 391int sig; 392{ 393 signal(SIGHUP, handlehup); 394 donehup = 1; 395} 396 397 398static void init_tabs() 399{ 400 struct protoent *p; 401 struct servent *s; 402 char *name, **tab; 403 int port, i; 404 405 if (protocols != NULL) { 406 for (i = 0; i < 256; i++) 407 if (protocols[i] != NULL) { 408 free(protocols[i]); 409 protocols[i] = NULL; 410 } 411 free(protocols); 412 protocols = NULL; 413 } 414 protocols = (char **)malloc(256 * sizeof(*protocols)); 415 if (protocols != NULL) { 416 bzero((char *)protocols, 256 * sizeof(*protocols)); 417 418 setprotoent(1); 419 while ((p = getprotoent()) != NULL) 420 if (p->p_proto >= 0 && p->p_proto <= 255 && 421 p->p_name != NULL && protocols[p->p_proto] == NULL) 422 protocols[p->p_proto] = strdup(p->p_name); 423 endprotoent(); 424#if defined(_AIX51) 425 if (protocols[0]) 426 free(protocols[0]); 427 if (protocols[252]) 428 free(protocols[252]); 429 protocols[0] = "ip"; 430 protocols[252] = NULL; 431#endif 432 } 433 434 if (udp_ports != NULL) { 435 for (i = 0; i < 65536; i++) 436 if (udp_ports[i] != NULL) { 437 free(udp_ports[i]); 438 udp_ports[i] = NULL; 439 } 440 free(udp_ports); 441 udp_ports = NULL; 442 } 443 udp_ports = (char **)malloc(65536 * sizeof(*udp_ports)); 444 if (udp_ports != NULL) 445 bzero((char *)udp_ports, 65536 * sizeof(*udp_ports)); 446 447 if (tcp_ports != NULL) { 448 for (i = 0; i < 65536; i++) 449 if (tcp_ports[i] != NULL) { 450 free(tcp_ports[i]); 451 tcp_ports[i] = NULL; 452 } 453 free(tcp_ports); 454 tcp_ports = NULL; 455 } 456 tcp_ports = (char **)malloc(65536 * sizeof(*tcp_ports)); 457 if (tcp_ports != NULL) 458 bzero((char *)tcp_ports, 65536 * sizeof(*tcp_ports)); 459 460 setservent(1); 461 while ((s = getservent()) != NULL) { 462 if (s->s_proto == NULL) 463 continue; 464 else if (!strcmp(s->s_proto, "tcp")) { 465 port = ntohs(s->s_port); 466 name = s->s_name; 467 tab = tcp_ports; 468 } else if (!strcmp(s->s_proto, "udp")) { 469 port = ntohs(s->s_port); 470 name = s->s_name; 471 tab = udp_ports; 472 } else 473 continue; 474 if ((port < 0 || port > 65535) || (name == NULL)) 475 continue; 476 if (tab != NULL) 477 tab[port] = strdup(name); 478 } 479 endservent(); 480} 481 482 483static char *getproto(p) 484u_int p; 485{ 486 static char pnum[4]; 487 char *s; 488 489 p &= 0xff; 490 s = protocols ? protocols[p] : NULL; 491 if (s == NULL) { 492 sprintf(pnum, "%u", p); 493 s = pnum; 494 } 495 return s; 496} 497 498 499static int read_log(fd, lenp, buf, bufsize) 500int fd, bufsize, *lenp; 501char *buf; 502{ 503 int nr; 504 505 nr = read(fd, buf, bufsize); 506 if (!nr) 507 return 2; 508 if ((nr < 0) && (errno != EINTR)) 509 return -1; 510 *lenp = nr; 511 return 0; 512} 513 514 515char *hostname(res, v, ip) 516int res, v; 517u_32_t *ip; 518{ 519# define MAX_INETA 16 520 static char hname[MAXHOSTNAMELEN + MAX_INETA + 3]; 521#ifdef USE_INET6 522 static char hostbuf[MAXHOSTNAMELEN+1]; 523#endif 524 struct hostent *hp; 525 struct in_addr ipa; 526 527 if (v == 4) { 528 ipa.s_addr = *ip; 529 if (!res) 530 return inet_ntoa(ipa); 531 hp = gethostbyaddr((char *)ip, sizeof(*ip), AF_INET); 532 if (!hp) 533 return inet_ntoa(ipa); 534 sprintf(hname, "%.*s[%s]", MAXHOSTNAMELEN, hp->h_name, 535 inet_ntoa(ipa)); 536 return hname; 537 } 538#ifdef USE_INET6 539 (void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1); 540 hostbuf[MAXHOSTNAMELEN] = '\0'; 541 return hostbuf; 542#else 543 return "IPv6"; 544#endif 545} 546 547 548char *portname(res, proto, port) 549int res; 550char *proto; 551u_int port; 552{ 553 static char pname[8]; 554 char *s; 555 556 port = ntohs(port); 557 port &= 0xffff; 558 (void) sprintf(pname, "%u", port); 559 if (!res || (opts & OPT_PORTNUM)) 560 return pname; 561 s = NULL; 562 if (!strcmp(proto, "tcp")) 563 s = tcp_ports[port]; 564 else if (!strcmp(proto, "udp")) 565 s = udp_ports[port]; 566 if (s == NULL) 567 s = pname; 568 return s; 569} 570 571 572static char *icmpname(type, code) 573u_int type; 574u_int code; 575{ 576 static char name[80]; 577 icmp_subtype_t *ist; 578 icmp_type_t *it; 579 char *s; 580 581 s = NULL; 582 it = find_icmptype(type, icmptypes, sizeof(icmptypes) / sizeof(*it)); 583 if (it != NULL) 584 s = it->it_name; 585 586 if (s == NULL) 587 sprintf(name, "icmptype(%d)/", type); 588 else 589 sprintf(name, "%s/", s); 590 591 ist = NULL; 592 if (it != NULL && it->it_subtable != NULL) 593 ist = find_icmpsubtype(code, it->it_subtable, it->it_stsize); 594 595 if (ist != NULL && ist->ist_name != NULL) 596 strcat(name, ist->ist_name); 597 else 598 sprintf(name + strlen(name), "%d", code); 599 600 return name; 601} 602 603static char *icmpname6(type, code) 604u_int type; 605u_int code; 606{ 607 static char name[80]; 608 icmp_subtype_t *ist; 609 icmp_type_t *it; 610 char *s; 611 612 s = NULL; 613 it = find_icmptype(type, icmptypes6, sizeof(icmptypes6) / sizeof(*it)); 614 if (it != NULL) 615 s = it->it_name; 616 617 if (s == NULL) 618 sprintf(name, "icmpv6type(%d)/", type); 619 else 620 sprintf(name, "%s/", s); 621 622 ist = NULL; 623 if (it != NULL && it->it_subtable != NULL) 624 ist = find_icmpsubtype(code, it->it_subtable, it->it_stsize); 625 626 if (ist != NULL && ist->ist_name != NULL) 627 strcat(name, ist->ist_name); 628 else 629 sprintf(name + strlen(name), "%d", code); 630 631 return name; 632} 633 634 635void dumphex(log, dopts, buf, len) 636FILE *log; 637int dopts; 638char *buf; 639int len; 640{ 641 char hline[80]; 642 int i, j, k; 643 u_char *s = (u_char *)buf, *t = (u_char *)hline; 644 645 if (buf == NULL || len == 0) 646 return; 647 648 *hline = '\0'; 649 650 for (i = len, j = 0; i; i--, j++, s++) { 651 if (j && !(j & 0xf)) { 652 *t++ = '\n'; 653 *t = '\0'; 654 if ((dopts & OPT_SYSLOG)) 655 syslog(LOG_INFO, "%s", hline); 656 else if (log != NULL) 657 fputs(hline, log); 658 t = (u_char *)hline; 659 *t = '\0'; 660 } 661 sprintf((char *)t, "%02x", *s & 0xff); 662 t += 2; 663 if (!((j + 1) & 0xf)) { 664 s -= 15; 665 sprintf((char *)t, " "); 666 t += 8; 667 for (k = 16; k; k--, s++) 668 *t++ = (ISPRINT(*s) ? *s : '.'); 669 s--; 670 } 671 672 if ((j + 1) & 0xf) 673 *t++ = ' ';; 674 } 675 676 if (j & 0xf) { 677 for (k = 16 - (j & 0xf); k; k--) { 678 *t++ = ' '; 679 *t++ = ' '; 680 *t++ = ' '; 681 } 682 sprintf((char *)t, " "); 683 t += 7; 684 s -= j & 0xf; 685 for (k = j & 0xf; k; k--, s++) 686 *t++ = (ISPRINT(*s) ? *s : '.'); 687 *t++ = '\n'; 688 *t = '\0'; 689 } 690 if ((dopts & OPT_SYSLOG) != 0) 691 syslog(LOG_INFO, "%s", hline); 692 else if (log != NULL) { 693 fputs(hline, log); 694 fflush(log); 695 } 696} 697 698 699static struct tm *get_tm(sec) 700#ifdef __hpux 701u_32_t sec; 702#else 703time_t sec; 704#endif 705{ 706 struct tm *tm; 707 time_t t; 708 709 t = sec; 710 tm = localtime(&t); 711 return tm; 712} 713 714static void print_natlog(log, buf, blen) 715FILE *log; 716char *buf; 717int blen; 718{ 719 struct natlog *nl; 720 iplog_t *ipl = (iplog_t *)buf; 721 char *t = line; 722 struct tm *tm; 723 int res, i, len; 724 char *proto; 725 726 nl = (struct natlog *)((char *)ipl + sizeof(*ipl)); 727 res = (opts & OPT_RESOLVE) ? 1 : 0; 728 tm = get_tm(ipl->ipl_sec); 729 len = sizeof(line); 730 if (!(opts & OPT_SYSLOG)) { 731 (void) strftime(t, len, "%d/%m/%Y ", tm); 732 i = strlen(t); 733 len -= i; 734 t += i; 735 } 736 (void) strftime(t, len, "%T", tm); 737 t += strlen(t); 738 (void) sprintf(t, ".%-.6ld @%hd ", ipl->ipl_usec, nl->nl_rule + 1); 739 t += strlen(t); 740 741 if (nl->nl_type == NL_NEWMAP) 742 strcpy(t, "NAT:MAP "); 743 else if (nl->nl_type == NL_NEWRDR) 744 strcpy(t, "NAT:RDR "); 745 else if (nl->nl_type == NL_FLUSH) 746 strcpy(t, "NAT:FLUSH "); 747 else if (nl->nl_type == NL_EXPIRE) 748 strcpy(t, "NAT:EXPIRE "); 749 else if (nl->nl_type == NL_NEWBIMAP) 750 strcpy(t, "NAT:BIMAP "); 751 else if (nl->nl_type == NL_NEWBLOCK) 752 strcpy(t, "NAT:MAPBLOCK "); 753 else if (nl->nl_type == NL_CLONE) 754 strcpy(t, "NAT:CLONE "); 755 else 756 sprintf(t, "Type: %d ", nl->nl_type); 757 t += strlen(t); 758 759 proto = getproto(nl->nl_p); 760 761 (void) sprintf(t, "%s,%s <- -> ", HOSTNAME_V4(res, nl->nl_inip), 762 portname(res, proto, (u_int)nl->nl_inport)); 763 t += strlen(t); 764 (void) sprintf(t, "%s,%s ", HOSTNAME_V4(res, nl->nl_outip), 765 portname(res, proto, (u_int)nl->nl_outport)); 766 t += strlen(t); 767 (void) sprintf(t, "[%s,%s]", HOSTNAME_V4(res, nl->nl_origip), 768 portname(res, proto, (u_int)nl->nl_origport)); 769 t += strlen(t); 770 if (nl->nl_type == NL_EXPIRE) { 771#ifdef USE_QUAD_T 772 (void) sprintf(t, " Pkts %qd/%qd Bytes %qd/%qd", 773 (long long)nl->nl_pkts[0], 774 (long long)nl->nl_pkts[1], 775 (long long)nl->nl_bytes[0], 776 (long long)nl->nl_bytes[1]); 777#else 778 (void) sprintf(t, " Pkts %ld/%ld Bytes %ld/%ld", 779 nl->nl_pkts[0], nl->nl_pkts[1], 780 nl->nl_bytes[0], nl->nl_bytes[1]); 781#endif 782 t += strlen(t); 783 } 784 785 *t++ = '\n'; 786 *t++ = '\0'; 787 if (opts & OPT_SYSLOG) 788 syslog(LOG_INFO, "%s", line); 789 else if (log != NULL) 790 (void) fprintf(log, "%s", line); 791} 792 793 794static void print_statelog(log, buf, blen) 795FILE *log; 796char *buf; 797int blen; 798{ 799 struct ipslog *sl; 800 iplog_t *ipl = (iplog_t *)buf; 801 char *t = line, *proto; 802 struct tm *tm; 803 int res, i, len; 804 805 sl = (struct ipslog *)((char *)ipl + sizeof(*ipl)); 806 res = (opts & OPT_RESOLVE) ? 1 : 0; 807 tm = get_tm(ipl->ipl_sec); 808 len = sizeof(line); 809 if (!(opts & OPT_SYSLOG)) { 810 (void) strftime(t, len, "%d/%m/%Y ", tm); 811 i = strlen(t); 812 len -= i; 813 t += i; 814 } 815 (void) strftime(t, len, "%T", tm); 816 t += strlen(t); 817 (void) sprintf(t, ".%-.6ld ", ipl->ipl_usec); 818 t += strlen(t); 819 820 switch (sl->isl_type) 821 { 822 case ISL_NEW : 823 strcpy(t, "STATE:NEW "); 824 break; 825 826 case ISL_CLONE : 827 strcpy(t, "STATE:CLONED "); 828 break; 829 830 case ISL_EXPIRE : 831 if ((sl->isl_p == IPPROTO_TCP) && 832 (sl->isl_state[0] > IPF_TCPS_ESTABLISHED || 833 sl->isl_state[1] > IPF_TCPS_ESTABLISHED)) 834 strcpy(t, "STATE:CLOSE "); 835 else 836 strcpy(t, "STATE:EXPIRE "); 837 break; 838 839 case ISL_FLUSH : 840 strcpy(t, "STATE:FLUSH "); 841 break; 842 843 case ISL_INTERMEDIATE : 844 strcpy(t, "STATE:INTERMEDIATE "); 845 break; 846 847 case ISL_REMOVE : 848 strcpy(t, "STATE:REMOVE "); 849 break; 850 851 case ISL_KILLED : 852 strcpy(t, "STATE:KILLED "); 853 break; 854 855 case ISL_UNLOAD : 856 strcpy(t, "STATE:UNLOAD "); 857 break; 858 859 default : 860 sprintf(t, "Type: %d ", sl->isl_type); 861 break; 862 } 863 t += strlen(t); 864 865 proto = getproto(sl->isl_p); 866 867 if (sl->isl_p == IPPROTO_TCP || sl->isl_p == IPPROTO_UDP) { 868 (void) sprintf(t, "%s,%s -> ", 869 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src), 870 portname(res, proto, (u_int)sl->isl_sport)); 871 t += strlen(t); 872 (void) sprintf(t, "%s,%s PR %s", 873 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 874 portname(res, proto, (u_int)sl->isl_dport), proto); 875 } else if (sl->isl_p == IPPROTO_ICMP) { 876 (void) sprintf(t, "%s -> ", hostname(res, sl->isl_v, 877 (u_32_t *)&sl->isl_src)); 878 t += strlen(t); 879 (void) sprintf(t, "%s PR icmp %d", 880 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 881 sl->isl_itype); 882 } else if (sl->isl_p == IPPROTO_ICMPV6) { 883 (void) sprintf(t, "%s -> ", hostname(res, sl->isl_v, 884 (u_32_t *)&sl->isl_src)); 885 t += strlen(t); 886 (void) sprintf(t, "%s PR icmpv6 %d", 887 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 888 sl->isl_itype); 889 } else { 890 (void) sprintf(t, "%s -> ", 891 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src)); 892 t += strlen(t); 893 (void) sprintf(t, "%s PR %s", 894 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 895 proto); 896 } 897 t += strlen(t); 898 if (sl->isl_tag != FR_NOLOGTAG) { 899 (void) sprintf(t, " tag %u", sl->isl_tag); 900 t += strlen(t); 901 } 902 if (sl->isl_type != ISL_NEW) { 903 sprintf(t, 904#ifdef USE_QUAD_T 905#ifdef PRId64 906 " Forward: Pkts in %" PRId64 " Bytes in %" PRId64 907 " Pkts out %" PRId64 " Bytes out %" PRId64 908 " Backward: Pkts in %" PRId64 " Bytes in %" PRId64 909 " Pkts out %" PRId64 " Bytes out %" PRId64, 910#else 911 " 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", 912#endif /* PRId64 */ 913#else 914 " 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", 915#endif 916 sl->isl_pkts[0], sl->isl_bytes[0], 917 sl->isl_pkts[1], sl->isl_bytes[1], 918 sl->isl_pkts[2], sl->isl_bytes[2], 919 sl->isl_pkts[3], sl->isl_bytes[3]); 920 921 t += strlen(t); 922 } 923 924 *t++ = '\n'; 925 *t++ = '\0'; 926 if (opts & OPT_SYSLOG) 927 syslog(LOG_INFO, "%s", line); 928 else if (log != NULL) 929 (void) fprintf(log, "%s", line); 930} 931 932 933static void print_log(logtype, log, buf, blen) 934FILE *log; 935char *buf; 936int logtype, blen; 937{ 938 iplog_t *ipl; 939 char *bp = NULL, *bpo = NULL; 940 int psize; 941 942 while (blen > 0) { 943 ipl = (iplog_t *)buf; 944 if ((u_long)ipl & (sizeof(long)-1)) { 945 if (bp) 946 bpo = bp; 947 bp = (char *)malloc(blen); 948 bcopy((char *)ipl, bp, blen); 949 if (bpo) { 950 free(bpo); 951 bpo = NULL; 952 } 953 buf = bp; 954 continue; 955 } 956 957 psize = ipl->ipl_dsize; 958 if (psize > blen) 959 break; 960 961 if (binarylog) { 962 fwrite(buf, psize, 1, binarylog); 963 fflush(binarylog); 964 } 965 966 if (logtype == IPL_LOGIPF) { 967 if (ipl->ipl_magic == IPL_MAGIC) 968 print_ipflog(log, buf, psize); 969 970 } else if (logtype == IPL_LOGNAT) { 971 if (ipl->ipl_magic == IPL_MAGIC_NAT) 972 print_natlog(log, buf, psize); 973 974 } else if (logtype == IPL_LOGSTATE) { 975 if (ipl->ipl_magic == IPL_MAGIC_STATE) 976 print_statelog(log, buf, psize); 977 } 978 979 blen -= psize; 980 buf += psize; 981 } 982 if (bp) 983 free(bp); 984 return; 985} 986 987 988static void print_ipflog(log, buf, blen) 989FILE *log; 990char *buf; 991int blen; 992{ 993 tcphdr_t *tp; 994 struct icmp *ic; 995 struct icmp *icmp; 996 struct tm *tm; 997 char *t, *proto; 998 int i, v, lvl, res, len, off, plen, ipoff, defaction; 999 ip_t *ipc, *ip; 1000 u_32_t *s, *d; 1001 u_short hl, p; 1002 ipflog_t *ipf; 1003 iplog_t *ipl; 1004#ifdef USE_INET6 1005 ip6_t *ip6; 1006#endif 1007 1008 ipl = (iplog_t *)buf; 1009 ipf = (ipflog_t *)((char *)buf + sizeof(*ipl)); 1010 ip = (ip_t *)((char *)ipf + sizeof(*ipf)); 1011 v = IP_V(ip); 1012 res = (opts & OPT_RESOLVE) ? 1 : 0; 1013 t = line; 1014 *t = '\0'; 1015 tm = get_tm(ipl->ipl_sec); 1016 1017 len = sizeof(line); 1018 if (!(opts & OPT_SYSLOG)) { 1019 (void) strftime(t, len, "%d/%m/%Y ", tm); 1020 i = strlen(t); 1021 len -= i; 1022 t += i; 1023 } 1024 (void) strftime(t, len, "%T", tm); 1025 t += strlen(t); 1026 (void) sprintf(t, ".%-.6ld ", ipl->ipl_usec); 1027 t += strlen(t); 1028 if (ipl->ipl_count > 1) { 1029 (void) sprintf(t, "%dx ", ipl->ipl_count); 1030 t += strlen(t); 1031 } 1032#if (defined(MENTAT) || \ 1033 (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 1034 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) || \ 1035 (defined(OpenBSD) && (OpenBSD >= 199603))) || defined(linux) 1036 { 1037 char ifname[sizeof(ipf->fl_ifname) + 1]; 1038 1039 strncpy(ifname, ipf->fl_ifname, sizeof(ipf->fl_ifname)); 1040 ifname[sizeof(ipf->fl_ifname)] = '\0'; 1041 (void) sprintf(t, "%s", ifname); 1042 t += strlen(t); 1043# if defined(MENTAT) || defined(linux) 1044 if (ISALPHA(*(t - 1))) { 1045 sprintf(t, "%d", ipf->fl_unit); 1046 t += strlen(t); 1047 } 1048# endif 1049 } 1050#else 1051 for (len = 0; len < 3; len++) 1052 if (ipf->fl_ifname[len] == '\0') 1053 break; 1054 if (ipf->fl_ifname[len]) 1055 len++; 1056 (void) sprintf(t, "%*.*s%u", len, len, ipf->fl_ifname, ipf->fl_unit); 1057 t += strlen(t); 1058#endif 1059 if ((ipf->fl_group[0] == (char)~0) && (ipf->fl_group[1] == '\0')) 1060 strcat(t, " @-1:"); 1061 else if (ipf->fl_group[0] == '\0') 1062 (void) strcpy(t, " @0:"); 1063 else 1064 (void) sprintf(t, " @%s:", ipf->fl_group); 1065 t += strlen(t); 1066 if (ipf->fl_rule == 0xffffffff) 1067 strcat(t, "-1 "); 1068 else 1069 (void) sprintf(t, "%u ", ipf->fl_rule + 1); 1070 t += strlen(t); 1071 1072 lvl = LOG_NOTICE; 1073 1074 if (ipf->fl_lflags & FI_SHORT) { 1075 *t++ = 'S'; 1076 lvl = LOG_ERR; 1077 } 1078 1079 if (FR_ISPASS(ipf->fl_flags)) { 1080 if (ipf->fl_flags & FR_LOGP) 1081 *t++ = 'p'; 1082 else 1083 *t++ = 'P'; 1084 } else if (FR_ISBLOCK(ipf->fl_flags)) { 1085 if (ipf->fl_flags & FR_LOGB) 1086 *t++ = 'b'; 1087 else 1088 *t++ = 'B'; 1089 lvl = LOG_WARNING; 1090 } else if ((ipf->fl_flags & FR_LOGMASK) == FR_LOG) { 1091 *t++ = 'L'; 1092 lvl = LOG_INFO; 1093 } else if (ipf->fl_flags & FF_LOGNOMATCH) { 1094 *t++ = 'n'; 1095 } else { 1096 *t++ = '?'; 1097 lvl = LOG_EMERG; 1098 } 1099 if (ipf->fl_loglevel != 0xffff) 1100 lvl = ipf->fl_loglevel; 1101 *t++ = ' '; 1102 *t = '\0'; 1103 1104 if (v == 6) { 1105#ifdef USE_INET6 1106 off = 0; 1107 ipoff = 0; 1108 hl = sizeof(ip6_t); 1109 ip6 = (ip6_t *)ip; 1110 p = (u_short)ip6->ip6_nxt; 1111 s = (u_32_t *)&ip6->ip6_src; 1112 d = (u_32_t *)&ip6->ip6_dst; 1113 plen = hl + ntohs(ip6->ip6_plen); 1114#else 1115 sprintf(t, "ipv6"); 1116 goto printipflog; 1117#endif 1118 } else if (v == 4) { 1119 hl = IP_HL(ip) << 2; 1120 ipoff = ip->ip_off; 1121 off = ipoff & IP_OFFMASK; 1122 p = (u_short)ip->ip_p; 1123 s = (u_32_t *)&ip->ip_src; 1124 d = (u_32_t *)&ip->ip_dst; 1125 plen = ip->ip_len; 1126 } else { 1127 goto printipflog; 1128 } 1129 proto = getproto(p); 1130 1131 if ((p == IPPROTO_TCP || p == IPPROTO_UDP) && !off) { 1132 tp = (tcphdr_t *)((char *)ip + hl); 1133 if (!(ipf->fl_lflags & FI_SHORT)) { 1134 (void) sprintf(t, "%s,%s -> ", hostname(res, v, s), 1135 portname(res, proto, (u_int)tp->th_sport)); 1136 t += strlen(t); 1137 (void) sprintf(t, "%s,%s PR %s len %hu %hu", 1138 hostname(res, v, d), 1139 portname(res, proto, (u_int)tp->th_dport), 1140 proto, hl, plen); 1141 t += strlen(t); 1142 1143 if (p == IPPROTO_TCP) { 1144 *t++ = ' '; 1145 *t++ = '-'; 1146 for (i = 0; tcpfl[i].value; i++) 1147 if (tp->th_flags & tcpfl[i].value) 1148 *t++ = tcpfl[i].flag; 1149 if (opts & OPT_VERBOSE) { 1150 (void) sprintf(t, " %lu %lu %hu", 1151 (u_long)(ntohl(tp->th_seq)), 1152 (u_long)(ntohl(tp->th_ack)), 1153 ntohs(tp->th_win)); 1154 t += strlen(t); 1155 } 1156 } 1157 *t = '\0'; 1158 } else { 1159 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1160 t += strlen(t); 1161 (void) sprintf(t, "%s PR %s len %hu %hu", 1162 hostname(res, v, d), proto, hl, plen); 1163 } 1164 } else if ((p == IPPROTO_ICMPV6) && !off && (v == 6)) { 1165 ic = (struct icmp *)((char *)ip + hl); 1166 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1167 t += strlen(t); 1168 (void) sprintf(t, "%s PR icmpv6 len %hu %hu icmpv6 %s", 1169 hostname(res, v, d), hl, plen, 1170 icmpname6(ic->icmp_type, ic->icmp_code)); 1171 } else if ((p == IPPROTO_ICMP) && !off && (v == 4)) { 1172 ic = (struct icmp *)((char *)ip + hl); 1173 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1174 t += strlen(t); 1175 (void) sprintf(t, "%s PR icmp len %hu %hu icmp %s", 1176 hostname(res, v, d), hl, plen, 1177 icmpname(ic->icmp_type, ic->icmp_code)); 1178 if (ic->icmp_type == ICMP_UNREACH || 1179 ic->icmp_type == ICMP_SOURCEQUENCH || 1180 ic->icmp_type == ICMP_PARAMPROB || 1181 ic->icmp_type == ICMP_REDIRECT || 1182 ic->icmp_type == ICMP_TIMXCEED) { 1183 ipc = &ic->icmp_ip; 1184 i = ntohs(ipc->ip_len); 1185 /* 1186 * XXX - try to guess endian of ip_len in ICMP 1187 * returned data. 1188 */ 1189 if (i > 1500) 1190 i = ipc->ip_len; 1191 ipoff = ntohs(ipc->ip_off); 1192 proto = getproto(ipc->ip_p); 1193 1194 if (!(ipoff & IP_OFFMASK) && 1195 ((ipc->ip_p == IPPROTO_TCP) || 1196 (ipc->ip_p == IPPROTO_UDP))) { 1197 tp = (tcphdr_t *)((char *)ipc + hl); 1198 t += strlen(t); 1199 (void) sprintf(t, " for %s,%s -", 1200 HOSTNAME_V4(res, ipc->ip_src), 1201 portname(res, proto, 1202 (u_int)tp->th_sport)); 1203 t += strlen(t); 1204 (void) sprintf(t, " %s,%s PR %s len %hu %hu", 1205 HOSTNAME_V4(res, ipc->ip_dst), 1206 portname(res, proto, 1207 (u_int)tp->th_dport), 1208 proto, IP_HL(ipc) << 2, i); 1209 } else if (!(ipoff & IP_OFFMASK) && 1210 (ipc->ip_p == IPPROTO_ICMP)) { 1211 icmp = (icmphdr_t *)((char *)ipc + hl); 1212 1213 t += strlen(t); 1214 (void) sprintf(t, " for %s -", 1215 HOSTNAME_V4(res, ipc->ip_src)); 1216 t += strlen(t); 1217 (void) sprintf(t, 1218 " %s PR icmp len %hu %hu icmp %d/%d", 1219 HOSTNAME_V4(res, ipc->ip_dst), 1220 IP_HL(ipc) << 2, i, 1221 icmp->icmp_type, icmp->icmp_code); 1222 } else { 1223 t += strlen(t); 1224 (void) sprintf(t, " for %s -", 1225 HOSTNAME_V4(res, ipc->ip_src)); 1226 t += strlen(t); 1227 (void) sprintf(t, " %s PR %s len %hu (%hu)", 1228 HOSTNAME_V4(res, ipc->ip_dst), proto, 1229 IP_HL(ipc) << 2, i); 1230 t += strlen(t); 1231 if (ipoff & IP_OFFMASK) { 1232 (void) sprintf(t, 1233 "(frag %d:%hu@%hu%s%s)", 1234 ntohs(ipc->ip_id), 1235 i - (IP_HL(ipc) << 2), 1236 (ipoff & IP_OFFMASK) << 3, 1237 ipoff & IP_MF ? "+" : "", 1238 ipoff & IP_DF ? "-" : ""); 1239 } 1240 } 1241 1242 } 1243 } else { 1244 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1245 t += strlen(t); 1246 (void) sprintf(t, "%s PR %s len %hu (%hu)", 1247 hostname(res, v, d), proto, hl, plen); 1248 t += strlen(t); 1249 if (off & IP_OFFMASK) 1250 (void) sprintf(t, " (frag %d:%hu@%hu%s%s)", 1251 ntohs(ip->ip_id), 1252 plen - hl, (off & IP_OFFMASK) << 3, 1253 ipoff & IP_MF ? "+" : "", 1254 ipoff & IP_DF ? "-" : ""); 1255 } 1256 t += strlen(t); 1257 1258printipflog: 1259 if (ipf->fl_flags & FR_KEEPSTATE) { 1260 (void) strcpy(t, " K-S"); 1261 t += strlen(t); 1262 } 1263 1264 if (ipf->fl_flags & FR_KEEPFRAG) { 1265 (void) strcpy(t, " K-F"); 1266 t += strlen(t); 1267 } 1268 1269 if (ipf->fl_dir == 0) 1270 strcpy(t, " IN"); 1271 else if (ipf->fl_dir == 1) 1272 strcpy(t, " OUT"); 1273 t += strlen(t); 1274 if (ipf->fl_logtag != 0) { 1275 sprintf(t, " log-tag %d", ipf->fl_logtag); 1276 t += strlen(t); 1277 } 1278 if (ipf->fl_nattag.ipt_num[0] != 0) { 1279 strcpy(t, " nat-tag "); 1280 t += strlen(t); 1281 strncpy(t, ipf->fl_nattag.ipt_tag, sizeof(ipf->fl_nattag)); 1282 t += strlen(t); 1283 } 1284 if ((ipf->fl_lflags & FI_LOWTTL) != 0) { 1285 strcpy(t, " low-ttl"); 1286 t += 8; 1287 } 1288 if ((ipf->fl_lflags & FI_OOW) != 0) { 1289 strcpy(t, " OOW"); 1290 t += 4; 1291 } 1292 if ((ipf->fl_lflags & FI_BAD) != 0) { 1293 strcpy(t, " bad"); 1294 t += 4; 1295 } 1296 if ((ipf->fl_lflags & FI_NATED) != 0) { 1297 strcpy(t, " NAT"); 1298 t += 4; 1299 } 1300 if ((ipf->fl_lflags & FI_BADNAT) != 0) { 1301 strcpy(t, " bad-NAT"); 1302 t += 8; 1303 } 1304 if ((ipf->fl_lflags & FI_BADSRC) != 0) { 1305 strcpy(t, " bad-src"); 1306 t += 8; 1307 } 1308 if ((ipf->fl_lflags & FI_MULTICAST) != 0) { 1309 strcpy(t, " multicast"); 1310 t += 10; 1311 } 1312 if ((ipf->fl_lflags & FI_BROADCAST) != 0) { 1313 strcpy(t, " broadcast"); 1314 t += 10; 1315 } 1316 if ((ipf->fl_lflags & (FI_MULTICAST|FI_BROADCAST|FI_MBCAST)) == 1317 FI_MBCAST) { 1318 strcpy(t, " mbcast"); 1319 t += 7; 1320 } 1321 *t++ = '\n'; 1322 *t++ = '\0'; 1323 defaction = 0; 1324 if (conf_file != NULL) 1325 defaction = check_action(buf, line, opts, lvl); 1326 if (defaction == 0) { 1327 if (opts & OPT_SYSLOG) 1328 syslog(lvl, "%s", line); 1329 else if (log != NULL) 1330 (void) fprintf(log, "%s", line); 1331 1332 if (opts & OPT_HEXHDR) 1333 dumphex(log, opts, buf, 1334 sizeof(iplog_t) + sizeof(*ipf)); 1335 if (opts & OPT_HEXBODY) 1336 dumphex(log, opts, (char *)ip, 1337 ipf->fl_plen + ipf->fl_hlen); 1338 else if ((opts & OPT_LOGBODY) && (ipf->fl_flags & FR_LOGBODY)) 1339 dumphex(log, opts, (char *)ip + ipf->fl_hlen, 1340 ipf->fl_plen); 1341 } 1342} 1343 1344 1345static void usage(prog) 1346char *prog; 1347{ 1348 fprintf(stderr, "%s: [-NFhstvxX] [-f <logfile>]\n", prog); 1349 exit(1); 1350} 1351 1352 1353static void write_pid(file) 1354char *file; 1355{ 1356 FILE *fp = NULL; 1357 int fd; 1358 1359 if ((fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0644)) >= 0) { 1360 fp = fdopen(fd, "w"); 1361 if (fp == NULL) { 1362 close(fd); 1363 fprintf(stderr, 1364 "unable to open/create pid file: %s\n", file); 1365 return; 1366 } 1367 fprintf(fp, "%d", getpid()); 1368 fclose(fp); 1369 } 1370} 1371 1372 1373static void flushlogs(file, log) 1374char *file; 1375FILE *log; 1376{ 1377 int fd, flushed = 0; 1378 1379 if ((fd = open(file, O_RDWR)) == -1) { 1380 (void) fprintf(stderr, "%s: open: %s\n", 1381 file, STRERROR(errno)); 1382 exit(1); 1383 } 1384 1385 if (ioctl(fd, SIOCIPFFB, &flushed) == 0) { 1386 printf("%d bytes flushed from log buffer\n", 1387 flushed); 1388 fflush(stdout); 1389 } else 1390 perror("SIOCIPFFB"); 1391 (void) close(fd); 1392 1393 if (flushed) { 1394 if (opts & OPT_SYSLOG) { 1395 syslog(LOG_INFO, "%d bytes flushed from log\n", 1396 flushed); 1397 } else if ((log != stdout) && (log != NULL)) { 1398 fprintf(log, "%d bytes flushed from log\n", flushed); 1399 } 1400 } 1401} 1402 1403 1404static void logopts(turnon, options) 1405int turnon; 1406char *options; 1407{ 1408 int flags = 0; 1409 char *s; 1410 1411 for (s = options; *s; s++) 1412 { 1413 switch (*s) 1414 { 1415 case 'N' : 1416 flags |= OPT_NAT; 1417 break; 1418 case 'S' : 1419 flags |= OPT_STATE; 1420 break; 1421 case 'I' : 1422 flags |= OPT_FILTER; 1423 break; 1424 default : 1425 fprintf(stderr, "Unknown log option %c\n", *s); 1426 exit(1); 1427 } 1428 } 1429 1430 if (turnon) 1431 opts |= flags; 1432 else 1433 opts &= ~(flags); 1434} 1435 1436 1437int main(argc, argv) 1438int argc; 1439char *argv[]; 1440{ 1441 struct stat sb; 1442 FILE *log = stdout; 1443 FILE *fp; 1444 int fd[3], doread, n, i; 1445 int tr, nr, regular[3], c; 1446 int fdt[3], devices = 0, make_daemon = 0; 1447 char buf[DEFAULT_IPFLOGSIZE], *iplfile[3], *s; 1448 extern int optind; 1449 extern char *optarg; 1450 1451 fd[0] = fd[1] = fd[2] = -1; 1452 fdt[0] = fdt[1] = fdt[2] = -1; 1453 iplfile[0] = IPL_NAME; 1454 iplfile[1] = IPNAT_NAME; 1455 iplfile[2] = IPSTATE_NAME; 1456 1457 while ((c = getopt(argc, argv, 1458 "?abB:C:Df:FhL:nN:o:O:pP:sS:tvxX")) != -1) 1459 switch (c) 1460 { 1461 case 'a' : 1462 opts |= OPT_LOGALL; 1463 fdt[0] = IPL_LOGIPF; 1464 fdt[1] = IPL_LOGNAT; 1465 fdt[2] = IPL_LOGSTATE; 1466 break; 1467 case 'b' : 1468 opts |= OPT_LOGBODY; 1469 break; 1470 case 'B' : 1471 binarylogfile = optarg; 1472 binarylog = fopen(optarg, "a"); 1473 break; 1474 case 'C' : 1475 conf_file = optarg; 1476 break; 1477 case 'D' : 1478 make_daemon = 1; 1479 break; 1480 case 'f' : case 'I' : 1481 opts |= OPT_FILTER; 1482 fdt[0] = IPL_LOGIPF; 1483 iplfile[0] = optarg; 1484 break; 1485 case 'F' : 1486 flushlogs(iplfile[0], log); 1487 flushlogs(iplfile[1], log); 1488 flushlogs(iplfile[2], log); 1489 break; 1490 case 'L' : 1491 logfac = fac_findname(optarg); 1492 if (logfac == -1) { 1493 fprintf(stderr, 1494 "Unknown syslog facility '%s'\n", 1495 optarg); 1496 exit(1); 1497 } 1498 break; 1499 case 'n' : 1500 opts |= OPT_RESOLVE; 1501 break; 1502 case 'N' : 1503 opts |= OPT_NAT; 1504 fdt[1] = IPL_LOGNAT; 1505 iplfile[1] = optarg; 1506 break; 1507 case 'o' : case 'O' : 1508 logopts(c == 'o', optarg); 1509 fdt[0] = fdt[1] = fdt[2] = -1; 1510 if (opts & OPT_FILTER) 1511 fdt[0] = IPL_LOGIPF; 1512 if (opts & OPT_NAT) 1513 fdt[1] = IPL_LOGNAT; 1514 if (opts & OPT_STATE) 1515 fdt[2] = IPL_LOGSTATE; 1516 break; 1517 case 'p' : 1518 opts |= OPT_PORTNUM; 1519 break; 1520 case 'P' : 1521 pidfile = optarg; 1522 break; 1523 case 's' : 1524 s = strrchr(argv[0], '/'); 1525 if (s == NULL) 1526 s = argv[0]; 1527 else 1528 s++; 1529 openlog(s, LOG_NDELAY|LOG_PID, logfac); 1530 s = NULL; 1531 opts |= OPT_SYSLOG; 1532 log = NULL; 1533 break; 1534 case 'S' : 1535 opts |= OPT_STATE; 1536 fdt[2] = IPL_LOGSTATE; 1537 iplfile[2] = optarg; 1538 break; 1539 case 't' : 1540 opts |= OPT_TAIL; 1541 break; 1542 case 'v' : 1543 opts |= OPT_VERBOSE; 1544 break; 1545 case 'x' : 1546 opts |= OPT_HEXBODY; 1547 break; 1548 case 'X' : 1549 opts |= OPT_HEXHDR; 1550 break; 1551 default : 1552 case 'h' : 1553 case '?' : 1554 usage(argv[0]); 1555 } 1556 1557 init_tabs(); 1558 if (conf_file) 1559 if (load_config(conf_file) == -1) 1560 exit(1); 1561 1562 /* 1563 * Default action is to only open the filter log file. 1564 */ 1565 if ((fdt[0] == -1) && (fdt[1] == -1) && (fdt[2] == -1)) 1566 fdt[0] = IPL_LOGIPF; 1567 1568 for (i = 0; i < 3; i++) { 1569 if (fdt[i] == -1) 1570 continue; 1571 if (!strcmp(iplfile[i], "-")) 1572 fd[i] = 0; 1573 else { 1574 if ((fd[i] = open(iplfile[i], O_RDONLY)) == -1) { 1575 (void) fprintf(stderr, 1576 "%s: open: %s\n", iplfile[i], 1577 STRERROR(errno)); 1578 exit(1); 1579 /* NOTREACHED */ 1580 } 1581 if (fstat(fd[i], &sb) == -1) { 1582 (void) fprintf(stderr, "%d: fstat: %s\n", 1583 fd[i], STRERROR(errno)); 1584 exit(1); 1585 /* NOTREACHED */ 1586 } 1587 if (!(regular[i] = !S_ISCHR(sb.st_mode))) 1588 devices++; 1589 } 1590 } 1591 1592 if (!(opts & OPT_SYSLOG)) { 1593 logfile = argv[optind]; 1594 log = logfile ? fopen(logfile, "a") : stdout; 1595 if (log == NULL) { 1596 (void) fprintf(stderr, "%s: fopen: %s\n", 1597 argv[optind], STRERROR(errno)); 1598 exit(1); 1599 /* NOTREACHED */ 1600 } 1601 setvbuf(log, NULL, _IONBF, 0); 1602 } else 1603 log = NULL; 1604 1605 if (make_daemon && ((log != stdout) || (opts & OPT_SYSLOG))) { 1606#if BSD >= 199306 1607 daemon(0, !(opts & OPT_SYSLOG)); 1608#else 1609 int pid; 1610 if ((pid = fork()) > 0) 1611 exit(0); 1612 if (pid < 0) { 1613 (void) fprintf(stderr, "%s: fork() failed: %s\n", 1614 argv[0], STRERROR(errno)); 1615 exit(1); 1616 /* NOTREACHED */ 1617 } 1618 setsid(); 1619 if ((opts & OPT_SYSLOG)) 1620 close(2); 1621#endif /* !BSD */ 1622 close(0); 1623 close(1); 1624 write_pid(pidfile); 1625 } 1626 1627 signal(SIGHUP, handlehup); 1628 1629 for (doread = 1; doread; ) { 1630 nr = 0; 1631 1632 for (i = 0; i < 3; i++) { 1633 tr = 0; 1634 if (fdt[i] == -1) 1635 continue; 1636 if (!regular[i]) { 1637 if (ioctl(fd[i], FIONREAD, &tr) == -1) { 1638 if (opts & OPT_SYSLOG) 1639 syslog(LOG_CRIT, 1640 "ioctl(FIONREAD): %m"); 1641 else 1642 perror("ioctl(FIONREAD)"); 1643 exit(1); 1644 /* NOTREACHED */ 1645 } 1646 } else { 1647 tr = (lseek(fd[i], 0, SEEK_CUR) < sb.st_size); 1648 if (!tr && !(opts & OPT_TAIL)) 1649 doread = 0; 1650 } 1651 if (!tr) 1652 continue; 1653 nr += tr; 1654 n = 0; 1655 1656 tr = read_log(fd[i], &n, buf, sizeof(buf)); 1657 if (donehup) { 1658 if (logfile && (fp = fopen(logfile, "a"))) { 1659 fclose(log); 1660 log = fp; 1661 } 1662 if (binarylogfile && 1663 (fp = fopen(binarylogfile, "a"))) { 1664 fclose(binarylog); 1665 binarylog = fp; 1666 } 1667 init_tabs(); 1668 if (conf_file != NULL) 1669 load_config(conf_file); 1670 donehup = 0; 1671 } 1672 1673 switch (tr) 1674 { 1675 case -1 : 1676 if (opts & OPT_SYSLOG) 1677 syslog(LOG_CRIT, "read: %m\n"); 1678 else 1679 perror("read"); 1680 doread = 0; 1681 break; 1682 case 1 : 1683 if (opts & OPT_SYSLOG) 1684 syslog(LOG_CRIT, "aborting logging\n"); 1685 else if (log != NULL) 1686 fprintf(log, "aborting logging\n"); 1687 doread = 0; 1688 break; 1689 case 2 : 1690 break; 1691 case 0 : 1692 if (n > 0) { 1693 print_log(fdt[i], log, buf, n); 1694 if (!(opts & OPT_SYSLOG)) 1695 fflush(log); 1696 } 1697 break; 1698 } 1699 } 1700 if (!nr && ((opts & OPT_TAIL) || devices)) 1701 sleep(1); 1702 } 1703 return(0); 1704 /* NOTREACHED */ 1705} 1706