ipmon.c revision 161357
1/* $FreeBSD: head/contrib/ipfilter/tools/ipmon.c 161357 2006-08-16 12:23:02Z guido $ */ 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 1.33.2.15 2006/03/18 06:59:39 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 if (sl->isl_type == ISL_NEW) 821 strcpy(t, "STATE:NEW "); 822 else if (sl->isl_type == ISL_CLONE) 823 strcpy(t, "STATE:CLONED "); 824 else if (sl->isl_type == ISL_EXPIRE) { 825 if ((sl->isl_p == IPPROTO_TCP) && 826 (sl->isl_state[0] > IPF_TCPS_ESTABLISHED || 827 sl->isl_state[1] > IPF_TCPS_ESTABLISHED)) 828 strcpy(t, "STATE:CLOSE "); 829 else 830 strcpy(t, "STATE:EXPIRE "); 831 } else if (sl->isl_type == ISL_FLUSH) 832 strcpy(t, "STATE:FLUSH "); 833 else if (sl->isl_type == ISL_INTERMEDIATE) 834 strcpy(t, "STATE:INTERMEDIATE "); 835 else if (sl->isl_type == ISL_REMOVE) 836 strcpy(t, "STATE:REMOVE "); 837 else if (sl->isl_type == ISL_KILLED) 838 strcpy(t, "STATE:KILLED "); 839 else 840 sprintf(t, "Type: %d ", sl->isl_type); 841 t += strlen(t); 842 843 proto = getproto(sl->isl_p); 844 845 if (sl->isl_p == IPPROTO_TCP || sl->isl_p == IPPROTO_UDP) { 846 (void) sprintf(t, "%s,%s -> ", 847 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src), 848 portname(res, proto, (u_int)sl->isl_sport)); 849 t += strlen(t); 850 (void) sprintf(t, "%s,%s PR %s", 851 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 852 portname(res, proto, (u_int)sl->isl_dport), proto); 853 } else if (sl->isl_p == IPPROTO_ICMP) { 854 (void) sprintf(t, "%s -> ", hostname(res, sl->isl_v, 855 (u_32_t *)&sl->isl_src)); 856 t += strlen(t); 857 (void) sprintf(t, "%s PR icmp %d", 858 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 859 sl->isl_itype); 860 } else if (sl->isl_p == IPPROTO_ICMPV6) { 861 (void) sprintf(t, "%s -> ", hostname(res, sl->isl_v, 862 (u_32_t *)&sl->isl_src)); 863 t += strlen(t); 864 (void) sprintf(t, "%s PR icmpv6 %d", 865 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 866 sl->isl_itype); 867 } else { 868 (void) sprintf(t, "%s -> ", 869 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src)); 870 t += strlen(t); 871 (void) sprintf(t, "%s PR %s", 872 hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst), 873 proto); 874 } 875 t += strlen(t); 876 if (sl->isl_tag != FR_NOLOGTAG) { 877 (void) sprintf(t, " tag %u", sl->isl_tag); 878 t += strlen(t); 879 } 880 if (sl->isl_type != ISL_NEW) { 881 sprintf(t, 882#ifdef USE_QUAD_T 883#ifdef PRId64 884 " Forward: Pkts in %" PRId64 " Bytes in %" PRId64 885 " Pkts out %" PRId64 " Bytes out %" PRId64 886 " Backward: Pkts in %" PRId64 " Bytes in %" PRId64 887 " Pkts out %" PRId64 " Bytes out %" PRId64, 888#else 889 " 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", 890#endif /* PRId64 */ 891#else 892 " 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", 893#endif 894 sl->isl_pkts[0], sl->isl_bytes[0], 895 sl->isl_pkts[1], sl->isl_bytes[1], 896 sl->isl_pkts[2], sl->isl_bytes[2], 897 sl->isl_pkts[3], sl->isl_bytes[3]); 898 899 t += strlen(t); 900 } 901 902 *t++ = '\n'; 903 *t++ = '\0'; 904 if (opts & OPT_SYSLOG) 905 syslog(LOG_INFO, "%s", line); 906 else if (log != NULL) 907 (void) fprintf(log, "%s", line); 908} 909 910 911static void print_log(logtype, log, buf, blen) 912FILE *log; 913char *buf; 914int logtype, blen; 915{ 916 iplog_t *ipl; 917 char *bp = NULL, *bpo = NULL; 918 int psize; 919 920 while (blen > 0) { 921 ipl = (iplog_t *)buf; 922 if ((u_long)ipl & (sizeof(long)-1)) { 923 if (bp) 924 bpo = bp; 925 bp = (char *)malloc(blen); 926 bcopy((char *)ipl, bp, blen); 927 if (bpo) { 928 free(bpo); 929 bpo = NULL; 930 } 931 buf = bp; 932 continue; 933 } 934 935 psize = ipl->ipl_dsize; 936 if (psize > blen) 937 break; 938 939 if (binarylog) { 940 fwrite(buf, psize, 1, binarylog); 941 fflush(binarylog); 942 } 943 944 if (logtype == IPL_LOGIPF) { 945 if (ipl->ipl_magic == IPL_MAGIC) 946 print_ipflog(log, buf, psize); 947 948 } else if (logtype == IPL_LOGNAT) { 949 if (ipl->ipl_magic == IPL_MAGIC_NAT) 950 print_natlog(log, buf, psize); 951 952 } else if (logtype == IPL_LOGSTATE) { 953 if (ipl->ipl_magic == IPL_MAGIC_STATE) 954 print_statelog(log, buf, psize); 955 } 956 957 blen -= psize; 958 buf += psize; 959 } 960 if (bp) 961 free(bp); 962 return; 963} 964 965 966static void print_ipflog(log, buf, blen) 967FILE *log; 968char *buf; 969int blen; 970{ 971 tcphdr_t *tp; 972 struct icmp *ic; 973 struct icmp *icmp; 974 struct tm *tm; 975 char *t, *proto; 976 int i, v, lvl, res, len, off, plen, ipoff, defaction; 977 ip_t *ipc, *ip; 978 u_32_t *s, *d; 979 u_short hl, p; 980 ipflog_t *ipf; 981 iplog_t *ipl; 982#ifdef USE_INET6 983 ip6_t *ip6; 984#endif 985 986 ipl = (iplog_t *)buf; 987 ipf = (ipflog_t *)((char *)buf + sizeof(*ipl)); 988 ip = (ip_t *)((char *)ipf + sizeof(*ipf)); 989 v = IP_V(ip); 990 res = (opts & OPT_RESOLVE) ? 1 : 0; 991 t = line; 992 *t = '\0'; 993 tm = get_tm(ipl->ipl_sec); 994 995 len = sizeof(line); 996 if (!(opts & OPT_SYSLOG)) { 997 (void) strftime(t, len, "%d/%m/%Y ", tm); 998 i = strlen(t); 999 len -= i; 1000 t += i; 1001 } 1002 (void) strftime(t, len, "%T", tm); 1003 t += strlen(t); 1004 (void) sprintf(t, ".%-.6ld ", ipl->ipl_usec); 1005 t += strlen(t); 1006 if (ipl->ipl_count > 1) { 1007 (void) sprintf(t, "%dx ", ipl->ipl_count); 1008 t += strlen(t); 1009 } 1010#if (defined(MENTAT) || \ 1011 (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 1012 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) || \ 1013 (defined(OpenBSD) && (OpenBSD >= 199603))) || defined(linux) 1014 { 1015 char ifname[sizeof(ipf->fl_ifname) + 1]; 1016 1017 strncpy(ifname, ipf->fl_ifname, sizeof(ipf->fl_ifname)); 1018 ifname[sizeof(ipf->fl_ifname)] = '\0'; 1019 (void) sprintf(t, "%s", ifname); 1020 t += strlen(t); 1021# if defined(MENTAT) || defined(linux) 1022 if (ISALPHA(*(t - 1))) { 1023 sprintf(t, "%d", ipf->fl_unit); 1024 t += strlen(t); 1025 } 1026# endif 1027 } 1028#else 1029 for (len = 0; len < 3; len++) 1030 if (ipf->fl_ifname[len] == '\0') 1031 break; 1032 if (ipf->fl_ifname[len]) 1033 len++; 1034 (void) sprintf(t, "%*.*s%u", len, len, ipf->fl_ifname, ipf->fl_unit); 1035 t += strlen(t); 1036#endif 1037 if ((ipf->fl_group[0] == (char)~0) && (ipf->fl_group[1] == '\0')) 1038 strcat(t, " @-1:"); 1039 else if (ipf->fl_group[0] == '\0') 1040 (void) strcpy(t, " @0:"); 1041 else 1042 (void) sprintf(t, " @%s:", ipf->fl_group); 1043 t += strlen(t); 1044 if (ipf->fl_rule == 0xffffffff) 1045 strcat(t, "-1 "); 1046 else 1047 (void) sprintf(t, "%u ", ipf->fl_rule + 1); 1048 t += strlen(t); 1049 1050 lvl = LOG_NOTICE; 1051 1052 if (ipf->fl_lflags & FI_SHORT) { 1053 *t++ = 'S'; 1054 lvl = LOG_ERR; 1055 } 1056 1057 if (FR_ISPASS(ipf->fl_flags)) { 1058 if (ipf->fl_flags & FR_LOGP) 1059 *t++ = 'p'; 1060 else 1061 *t++ = 'P'; 1062 } else if (FR_ISBLOCK(ipf->fl_flags)) { 1063 if (ipf->fl_flags & FR_LOGB) 1064 *t++ = 'b'; 1065 else 1066 *t++ = 'B'; 1067 lvl = LOG_WARNING; 1068 } else if ((ipf->fl_flags & FR_LOGMASK) == FR_LOG) { 1069 *t++ = 'L'; 1070 lvl = LOG_INFO; 1071 } else if (ipf->fl_flags & FF_LOGNOMATCH) { 1072 *t++ = 'n'; 1073 } else { 1074 *t++ = '?'; 1075 lvl = LOG_EMERG; 1076 } 1077 if (ipf->fl_loglevel != 0xffff) 1078 lvl = ipf->fl_loglevel; 1079 *t++ = ' '; 1080 *t = '\0'; 1081 1082 if (v == 6) { 1083#ifdef USE_INET6 1084 off = 0; 1085 ipoff = 0; 1086 hl = sizeof(ip6_t); 1087 ip6 = (ip6_t *)ip; 1088 p = (u_short)ip6->ip6_nxt; 1089 s = (u_32_t *)&ip6->ip6_src; 1090 d = (u_32_t *)&ip6->ip6_dst; 1091 plen = hl + ntohs(ip6->ip6_plen); 1092#else 1093 sprintf(t, "ipv6"); 1094 goto printipflog; 1095#endif 1096 } else if (v == 4) { 1097 hl = IP_HL(ip) << 2; 1098 ipoff = ip->ip_off; 1099 off = ipoff & IP_OFFMASK; 1100 p = (u_short)ip->ip_p; 1101 s = (u_32_t *)&ip->ip_src; 1102 d = (u_32_t *)&ip->ip_dst; 1103 plen = ip->ip_len; 1104 } else { 1105 goto printipflog; 1106 } 1107 proto = getproto(p); 1108 1109 if ((p == IPPROTO_TCP || p == IPPROTO_UDP) && !off) { 1110 tp = (tcphdr_t *)((char *)ip + hl); 1111 if (!(ipf->fl_lflags & FI_SHORT)) { 1112 (void) sprintf(t, "%s,%s -> ", hostname(res, v, s), 1113 portname(res, proto, (u_int)tp->th_sport)); 1114 t += strlen(t); 1115 (void) sprintf(t, "%s,%s PR %s len %hu %hu", 1116 hostname(res, v, d), 1117 portname(res, proto, (u_int)tp->th_dport), 1118 proto, hl, plen); 1119 t += strlen(t); 1120 1121 if (p == IPPROTO_TCP) { 1122 *t++ = ' '; 1123 *t++ = '-'; 1124 for (i = 0; tcpfl[i].value; i++) 1125 if (tp->th_flags & tcpfl[i].value) 1126 *t++ = tcpfl[i].flag; 1127 if (opts & OPT_VERBOSE) { 1128 (void) sprintf(t, " %lu %lu %hu", 1129 (u_long)(ntohl(tp->th_seq)), 1130 (u_long)(ntohl(tp->th_ack)), 1131 ntohs(tp->th_win)); 1132 t += strlen(t); 1133 } 1134 } 1135 *t = '\0'; 1136 } else { 1137 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1138 t += strlen(t); 1139 (void) sprintf(t, "%s PR %s len %hu %hu", 1140 hostname(res, v, d), proto, hl, plen); 1141 } 1142 } else if ((p == IPPROTO_ICMPV6) && !off && (v == 6)) { 1143 ic = (struct icmp *)((char *)ip + hl); 1144 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1145 t += strlen(t); 1146 (void) sprintf(t, "%s PR icmpv6 len %hu %hu icmpv6 %s", 1147 hostname(res, v, d), hl, plen, 1148 icmpname6(ic->icmp_type, ic->icmp_code)); 1149 } else if ((p == IPPROTO_ICMP) && !off && (v == 4)) { 1150 ic = (struct icmp *)((char *)ip + hl); 1151 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1152 t += strlen(t); 1153 (void) sprintf(t, "%s PR icmp len %hu %hu icmp %s", 1154 hostname(res, v, d), hl, plen, 1155 icmpname(ic->icmp_type, ic->icmp_code)); 1156 if (ic->icmp_type == ICMP_UNREACH || 1157 ic->icmp_type == ICMP_SOURCEQUENCH || 1158 ic->icmp_type == ICMP_PARAMPROB || 1159 ic->icmp_type == ICMP_REDIRECT || 1160 ic->icmp_type == ICMP_TIMXCEED) { 1161 ipc = &ic->icmp_ip; 1162 i = ntohs(ipc->ip_len); 1163 /* 1164 * XXX - try to guess endian of ip_len in ICMP 1165 * returned data. 1166 */ 1167 if (i > 1500) 1168 i = ipc->ip_len; 1169 ipoff = ntohs(ipc->ip_off); 1170 proto = getproto(ipc->ip_p); 1171 1172 if (!(ipoff & IP_OFFMASK) && 1173 ((ipc->ip_p == IPPROTO_TCP) || 1174 (ipc->ip_p == IPPROTO_UDP))) { 1175 tp = (tcphdr_t *)((char *)ipc + hl); 1176 t += strlen(t); 1177 (void) sprintf(t, " for %s,%s -", 1178 HOSTNAME_V4(res, ipc->ip_src), 1179 portname(res, proto, 1180 (u_int)tp->th_sport)); 1181 t += strlen(t); 1182 (void) sprintf(t, " %s,%s PR %s len %hu %hu", 1183 HOSTNAME_V4(res, ipc->ip_dst), 1184 portname(res, proto, 1185 (u_int)tp->th_dport), 1186 proto, IP_HL(ipc) << 2, i); 1187 } else if (!(ipoff & IP_OFFMASK) && 1188 (ipc->ip_p == IPPROTO_ICMP)) { 1189 icmp = (icmphdr_t *)((char *)ipc + hl); 1190 1191 t += strlen(t); 1192 (void) sprintf(t, " for %s -", 1193 HOSTNAME_V4(res, ipc->ip_src)); 1194 t += strlen(t); 1195 (void) sprintf(t, 1196 " %s PR icmp len %hu %hu icmp %d/%d", 1197 HOSTNAME_V4(res, ipc->ip_dst), 1198 IP_HL(ipc) << 2, i, 1199 icmp->icmp_type, icmp->icmp_code); 1200 } else { 1201 t += strlen(t); 1202 (void) sprintf(t, " for %s -", 1203 HOSTNAME_V4(res, ipc->ip_src)); 1204 t += strlen(t); 1205 (void) sprintf(t, " %s PR %s len %hu (%hu)", 1206 HOSTNAME_V4(res, ipc->ip_dst), proto, 1207 IP_HL(ipc) << 2, i); 1208 t += strlen(t); 1209 if (ipoff & IP_OFFMASK) { 1210 (void) sprintf(t, 1211 "(frag %d:%hu@%hu%s%s)", 1212 ntohs(ipc->ip_id), 1213 i - (IP_HL(ipc) << 2), 1214 (ipoff & IP_OFFMASK) << 3, 1215 ipoff & IP_MF ? "+" : "", 1216 ipoff & IP_DF ? "-" : ""); 1217 } 1218 } 1219 1220 } 1221 } else { 1222 (void) sprintf(t, "%s -> ", hostname(res, v, s)); 1223 t += strlen(t); 1224 (void) sprintf(t, "%s PR %s len %hu (%hu)", 1225 hostname(res, v, d), proto, hl, plen); 1226 t += strlen(t); 1227 if (off & IP_OFFMASK) 1228 (void) sprintf(t, " (frag %d:%hu@%hu%s%s)", 1229 ntohs(ip->ip_id), 1230 plen - hl, (off & IP_OFFMASK) << 3, 1231 ipoff & IP_MF ? "+" : "", 1232 ipoff & IP_DF ? "-" : ""); 1233 } 1234 t += strlen(t); 1235 1236printipflog: 1237 if (ipf->fl_flags & FR_KEEPSTATE) { 1238 (void) strcpy(t, " K-S"); 1239 t += strlen(t); 1240 } 1241 1242 if (ipf->fl_flags & FR_KEEPFRAG) { 1243 (void) strcpy(t, " K-F"); 1244 t += strlen(t); 1245 } 1246 1247 if (ipf->fl_dir == 0) 1248 strcpy(t, " IN"); 1249 else if (ipf->fl_dir == 1) 1250 strcpy(t, " OUT"); 1251 t += strlen(t); 1252 if (ipf->fl_logtag != 0) { 1253 sprintf(t, " log-tag %d", ipf->fl_logtag); 1254 t += strlen(t); 1255 } 1256 if (ipf->fl_nattag.ipt_num[0] != 0) { 1257 strcpy(t, " nat-tag "); 1258 t += strlen(t); 1259 strncpy(t, ipf->fl_nattag.ipt_tag, sizeof(ipf->fl_nattag)); 1260 t += strlen(t); 1261 } 1262 if ((ipf->fl_lflags & FI_LOWTTL) != 0) { 1263 strcpy(t, " low-ttl"); 1264 t += 8; 1265 } 1266 if ((ipf->fl_lflags & FI_OOW) != 0) { 1267 strcpy(t, " OOW"); 1268 t += 4; 1269 } 1270 if ((ipf->fl_lflags & FI_BAD) != 0) { 1271 strcpy(t, " bad"); 1272 t += 4; 1273 } 1274 if ((ipf->fl_lflags & FI_NATED) != 0) { 1275 strcpy(t, " NAT"); 1276 t += 4; 1277 } 1278 if ((ipf->fl_lflags & FI_BADNAT) != 0) { 1279 strcpy(t, " bad-NAT"); 1280 t += 8; 1281 } 1282 if ((ipf->fl_lflags & FI_BADSRC) != 0) { 1283 strcpy(t, " bad-src"); 1284 t += 8; 1285 } 1286 if ((ipf->fl_lflags & FI_MULTICAST) != 0) { 1287 strcpy(t, " multicast"); 1288 t += 10; 1289 } 1290 if ((ipf->fl_lflags & FI_BROADCAST) != 0) { 1291 strcpy(t, " broadcast"); 1292 t += 10; 1293 } 1294 if ((ipf->fl_lflags & (FI_MULTICAST|FI_BROADCAST|FI_MBCAST)) == 1295 FI_MBCAST) { 1296 strcpy(t, " mbcast"); 1297 t += 7; 1298 } 1299 *t++ = '\n'; 1300 *t++ = '\0'; 1301 defaction = 0; 1302 if (conf_file != NULL) 1303 defaction = check_action(buf, line, opts, lvl); 1304 if (defaction == 0) { 1305 if (opts & OPT_SYSLOG) 1306 syslog(lvl, "%s", line); 1307 else if (log != NULL) 1308 (void) fprintf(log, "%s", line); 1309 1310 if (opts & OPT_HEXHDR) 1311 dumphex(log, opts, buf, 1312 sizeof(iplog_t) + sizeof(*ipf)); 1313 if (opts & OPT_HEXBODY) 1314 dumphex(log, opts, (char *)ip, 1315 ipf->fl_plen + ipf->fl_hlen); 1316 else if ((opts & OPT_LOGBODY) && (ipf->fl_flags & FR_LOGBODY)) 1317 dumphex(log, opts, (char *)ip + ipf->fl_hlen, 1318 ipf->fl_plen); 1319 } 1320} 1321 1322 1323static void usage(prog) 1324char *prog; 1325{ 1326 fprintf(stderr, "%s: [-NFhstvxX] [-f <logfile>]\n", prog); 1327 exit(1); 1328} 1329 1330 1331static void write_pid(file) 1332char *file; 1333{ 1334 FILE *fp = NULL; 1335 int fd; 1336 1337 if ((fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0644)) >= 0) { 1338 fp = fdopen(fd, "w"); 1339 if (fp == NULL) { 1340 close(fd); 1341 fprintf(stderr, 1342 "unable to open/create pid file: %s\n", file); 1343 return; 1344 } 1345 fprintf(fp, "%d", getpid()); 1346 fclose(fp); 1347 } 1348} 1349 1350 1351static void flushlogs(file, log) 1352char *file; 1353FILE *log; 1354{ 1355 int fd, flushed = 0; 1356 1357 if ((fd = open(file, O_RDWR)) == -1) { 1358 (void) fprintf(stderr, "%s: open: %s\n", 1359 file, STRERROR(errno)); 1360 exit(1); 1361 } 1362 1363 if (ioctl(fd, SIOCIPFFB, &flushed) == 0) { 1364 printf("%d bytes flushed from log buffer\n", 1365 flushed); 1366 fflush(stdout); 1367 } else 1368 perror("SIOCIPFFB"); 1369 (void) close(fd); 1370 1371 if (flushed) { 1372 if (opts & OPT_SYSLOG) { 1373 syslog(LOG_INFO, "%d bytes flushed from log\n", 1374 flushed); 1375 } else if ((log != stdout) && (log != NULL)) { 1376 fprintf(log, "%d bytes flushed from log\n", flushed); 1377 } 1378 } 1379} 1380 1381 1382static void logopts(turnon, options) 1383int turnon; 1384char *options; 1385{ 1386 int flags = 0; 1387 char *s; 1388 1389 for (s = options; *s; s++) 1390 { 1391 switch (*s) 1392 { 1393 case 'N' : 1394 flags |= OPT_NAT; 1395 break; 1396 case 'S' : 1397 flags |= OPT_STATE; 1398 break; 1399 case 'I' : 1400 flags |= OPT_FILTER; 1401 break; 1402 default : 1403 fprintf(stderr, "Unknown log option %c\n", *s); 1404 exit(1); 1405 } 1406 } 1407 1408 if (turnon) 1409 opts |= flags; 1410 else 1411 opts &= ~(flags); 1412} 1413 1414 1415int main(argc, argv) 1416int argc; 1417char *argv[]; 1418{ 1419 struct stat sb; 1420 FILE *log = stdout; 1421 FILE *fp; 1422 int fd[3], doread, n, i; 1423 int tr, nr, regular[3], c; 1424 int fdt[3], devices = 0, make_daemon = 0; 1425 char buf[DEFAULT_IPFLOGSIZE], *iplfile[3], *s; 1426 extern int optind; 1427 extern char *optarg; 1428 1429 fd[0] = fd[1] = fd[2] = -1; 1430 fdt[0] = fdt[1] = fdt[2] = -1; 1431 iplfile[0] = IPL_NAME; 1432 iplfile[1] = IPNAT_NAME; 1433 iplfile[2] = IPSTATE_NAME; 1434 1435 while ((c = getopt(argc, argv, 1436 "?abB:C:Df:FhL:nN:o:O:pP:sS:tvxX")) != -1) 1437 switch (c) 1438 { 1439 case 'a' : 1440 opts |= OPT_LOGALL; 1441 fdt[0] = IPL_LOGIPF; 1442 fdt[1] = IPL_LOGNAT; 1443 fdt[2] = IPL_LOGSTATE; 1444 break; 1445 case 'b' : 1446 opts |= OPT_LOGBODY; 1447 break; 1448 case 'B' : 1449 binarylogfile = optarg; 1450 binarylog = fopen(optarg, "a"); 1451 break; 1452 case 'C' : 1453 conf_file = optarg; 1454 break; 1455 case 'D' : 1456 make_daemon = 1; 1457 break; 1458 case 'f' : case 'I' : 1459 opts |= OPT_FILTER; 1460 fdt[0] = IPL_LOGIPF; 1461 iplfile[0] = optarg; 1462 break; 1463 case 'F' : 1464 flushlogs(iplfile[0], log); 1465 flushlogs(iplfile[1], log); 1466 flushlogs(iplfile[2], log); 1467 break; 1468 case 'L' : 1469 logfac = fac_findname(optarg); 1470 if (logfac == -1) { 1471 fprintf(stderr, 1472 "Unknown syslog facility '%s'\n", 1473 optarg); 1474 exit(1); 1475 } 1476 break; 1477 case 'n' : 1478 opts |= OPT_RESOLVE; 1479 break; 1480 case 'N' : 1481 opts |= OPT_NAT; 1482 fdt[1] = IPL_LOGNAT; 1483 iplfile[1] = optarg; 1484 break; 1485 case 'o' : case 'O' : 1486 logopts(c == 'o', optarg); 1487 fdt[0] = fdt[1] = fdt[2] = -1; 1488 if (opts & OPT_FILTER) 1489 fdt[0] = IPL_LOGIPF; 1490 if (opts & OPT_NAT) 1491 fdt[1] = IPL_LOGNAT; 1492 if (opts & OPT_STATE) 1493 fdt[2] = IPL_LOGSTATE; 1494 break; 1495 case 'p' : 1496 opts |= OPT_PORTNUM; 1497 break; 1498 case 'P' : 1499 pidfile = optarg; 1500 break; 1501 case 's' : 1502 s = strrchr(argv[0], '/'); 1503 if (s == NULL) 1504 s = argv[0]; 1505 else 1506 s++; 1507 openlog(s, LOG_NDELAY|LOG_PID, logfac); 1508 s = NULL; 1509 opts |= OPT_SYSLOG; 1510 log = NULL; 1511 break; 1512 case 'S' : 1513 opts |= OPT_STATE; 1514 fdt[2] = IPL_LOGSTATE; 1515 iplfile[2] = optarg; 1516 break; 1517 case 't' : 1518 opts |= OPT_TAIL; 1519 break; 1520 case 'v' : 1521 opts |= OPT_VERBOSE; 1522 break; 1523 case 'x' : 1524 opts |= OPT_HEXBODY; 1525 break; 1526 case 'X' : 1527 opts |= OPT_HEXHDR; 1528 break; 1529 default : 1530 case 'h' : 1531 case '?' : 1532 usage(argv[0]); 1533 } 1534 1535 init_tabs(); 1536 if (conf_file) 1537 if (load_config(conf_file) == -1) 1538 exit(1); 1539 1540 /* 1541 * Default action is to only open the filter log file. 1542 */ 1543 if ((fdt[0] == -1) && (fdt[1] == -1) && (fdt[2] == -1)) 1544 fdt[0] = IPL_LOGIPF; 1545 1546 for (i = 0; i < 3; i++) { 1547 if (fdt[i] == -1) 1548 continue; 1549 if (!strcmp(iplfile[i], "-")) 1550 fd[i] = 0; 1551 else { 1552 if ((fd[i] = open(iplfile[i], O_RDONLY)) == -1) { 1553 (void) fprintf(stderr, 1554 "%s: open: %s\n", iplfile[i], 1555 STRERROR(errno)); 1556 exit(1); 1557 /* NOTREACHED */ 1558 } 1559 if (fstat(fd[i], &sb) == -1) { 1560 (void) fprintf(stderr, "%d: fstat: %s\n", 1561 fd[i], STRERROR(errno)); 1562 exit(1); 1563 /* NOTREACHED */ 1564 } 1565 if (!(regular[i] = !S_ISCHR(sb.st_mode))) 1566 devices++; 1567 } 1568 } 1569 1570 if (!(opts & OPT_SYSLOG)) { 1571 logfile = argv[optind]; 1572 log = logfile ? fopen(logfile, "a") : stdout; 1573 if (log == NULL) { 1574 (void) fprintf(stderr, "%s: fopen: %s\n", 1575 argv[optind], STRERROR(errno)); 1576 exit(1); 1577 /* NOTREACHED */ 1578 } 1579 setvbuf(log, NULL, _IONBF, 0); 1580 } else 1581 log = NULL; 1582 1583 if (make_daemon && ((log != stdout) || (opts & OPT_SYSLOG))) { 1584#if BSD >= 199306 1585 daemon(0, !(opts & OPT_SYSLOG)); 1586#else 1587 int pid; 1588 if ((pid = fork()) > 0) 1589 exit(0); 1590 if (pid < 0) { 1591 (void) fprintf(stderr, "%s: fork() failed: %s\n", 1592 argv[0], STRERROR(errno)); 1593 exit(1); 1594 /* NOTREACHED */ 1595 } 1596 setsid(); 1597 if ((opts & OPT_SYSLOG)) 1598 close(2); 1599#endif /* !BSD */ 1600 close(0); 1601 close(1); 1602 write_pid(pidfile); 1603 } 1604 1605 signal(SIGHUP, handlehup); 1606 1607 for (doread = 1; doread; ) { 1608 nr = 0; 1609 1610 for (i = 0; i < 3; i++) { 1611 tr = 0; 1612 if (fdt[i] == -1) 1613 continue; 1614 if (!regular[i]) { 1615 if (ioctl(fd[i], FIONREAD, &tr) == -1) { 1616 if (opts & OPT_SYSLOG) 1617 syslog(LOG_CRIT, 1618 "ioctl(FIONREAD): %m"); 1619 else 1620 perror("ioctl(FIONREAD)"); 1621 exit(1); 1622 /* NOTREACHED */ 1623 } 1624 } else { 1625 tr = (lseek(fd[i], 0, SEEK_CUR) < sb.st_size); 1626 if (!tr && !(opts & OPT_TAIL)) 1627 doread = 0; 1628 } 1629 if (!tr) 1630 continue; 1631 nr += tr; 1632 1633 tr = read_log(fd[i], &n, buf, sizeof(buf)); 1634 if (donehup) { 1635 if (logfile && (fp = fopen(logfile, "a"))) { 1636 fclose(log); 1637 log = fp; 1638 } 1639 if (binarylogfile && 1640 (fp = fopen(binarylogfile, "a"))) { 1641 fclose(binarylog); 1642 binarylog = fp; 1643 } 1644 init_tabs(); 1645 if (conf_file != NULL) 1646 load_config(conf_file); 1647 donehup = 0; 1648 } 1649 1650 switch (tr) 1651 { 1652 case -1 : 1653 if (opts & OPT_SYSLOG) 1654 syslog(LOG_CRIT, "read: %m\n"); 1655 else 1656 perror("read"); 1657 doread = 0; 1658 break; 1659 case 1 : 1660 if (opts & OPT_SYSLOG) 1661 syslog(LOG_CRIT, "aborting logging\n"); 1662 else if (log != NULL) 1663 fprintf(log, "aborting logging\n"); 1664 doread = 0; 1665 break; 1666 case 2 : 1667 break; 1668 case 0 : 1669 if (n > 0) { 1670 print_log(fdt[i], log, buf, n); 1671 if (!(opts & OPT_SYSLOG)) 1672 fflush(log); 1673 } 1674 break; 1675 } 1676 } 1677 if (!nr && ((opts & OPT_TAIL) || devices)) 1678 sleep(1); 1679 } 1680 return(0); 1681 /* NOTREACHED */ 1682} 1683