ipf_y.y revision 170268
1199969Savg/* $FreeBSD: head/contrib/ipfilter/tools/ipf_y.y 170268 2007-06-04 02:54:36Z darrenr $ */ 2199969Savg 3199969Savg/* 4199969Savg * Copyright (C) 2001-2006 by Darren Reed. 5199969Savg * 6199969Savg * See the IPFILTER.LICENCE file for details on licencing. 7199969Savg */ 8199969Savg%{ 9199969Savg#include "ipf.h" 10199969Savg#include <sys/ioctl.h> 11199969Savg#include <syslog.h> 12199969Savg#ifdef IPFILTER_BPF 13199969Savg# include "pcap-bpf.h" 14199969Savg# define _NET_BPF_H_ 15199969Savg# include <pcap.h> 16199969Savg#endif 17199969Savg#include "netinet/ip_pool.h" 18199969Savg#include "netinet/ip_htable.h" 19199969Savg#include "netinet/ipl.h" 20199969Savg#include "ipf_l.h" 21199969Savg 22199969Savg#define YYDEBUG 1 23199969Savg#define DOALL(x) for (fr = frc; fr != NULL; fr = fr->fr_next) { x } 24199969Savg#define DOREM(x) for (; fr != NULL; fr = fr->fr_next) { x } 25199969Savg 26199969Savgextern void yyerror __P((char *)); 27199969Savgextern int yyparse __P((void)); 28222805Savgextern int yylex __P((void)); 29199969Savgextern int yydebug; 30199969Savgextern FILE *yyin; 31199969Savgextern int yylineNum; 32199969Savg 33222805Savgstatic void newrule __P((void)); 34199969Savgstatic void setipftype __P((void)); 35199969Savgstatic u_32_t lookuphost __P((char *)); 36199969Savgstatic void dobpf __P((int, char *)); 37199969Savgstatic void resetaddr __P((void)); 38199969Savgstatic struct alist_s *newalist __P((struct alist_s *)); 39199969Savgstatic u_int makehash __P((struct alist_s *)); 40199969Savgstatic int makepool __P((struct alist_s *)); 41199969Savgstatic frentry_t *addrule __P((void)); 42199969Savgstatic void setsyslog __P((void)); 43199969Savgstatic void unsetsyslog __P((void)); 44199969Savgstatic void fillgroup __P((frentry_t *)); 45199969Savg 46199969Savgfrentry_t *fr = NULL, *frc = NULL, *frtop = NULL, *frold = NULL; 47199969Savg 48199969Savgstatic int ifpflag = 0; 49199969Savgstatic int nowith = 0; 50199969Savgstatic int dynamic = -1; 51199969Savgstatic int pooled = 0; 52199969Savgstatic int hashed = 0; 53199969Savgstatic int nrules = 0; 54222805Savgstatic int newlist = 0; 55199969Savgstatic int added = 0; 56199969Savgstatic int ipffd = -1; 57199969Savgstatic int *yycont = 0; 58199969Savgstatic ioctlfunc_t ipfioctl[IPL_LOGSIZE]; 59199969Savgstatic addfunc_t ipfaddfunc = NULL; 60199969Savgstatic struct wordtab ipfwords[95]; 61199969Savgstatic struct wordtab addrwords[4]; 62199969Savgstatic struct wordtab maskwords[5]; 63199969Savgstatic struct wordtab icmpcodewords[17]; 64222721Savgstatic struct wordtab icmptypewords[16]; 65222721Savgstatic struct wordtab ipv4optwords[25]; 66222721Savgstatic struct wordtab ipv4secwords[9]; 67199969Savgstatic struct wordtab ipv6optwords[9]; 68199969Savgstatic struct wordtab logwords[33]; 69199969Savg 70199969Savg%} 71199969Savg%union { 72222720Savg char *str; 73199969Savg u_32_t num; 74222720Savg struct in_addr ipa; 75 frentry_t fr; 76 frtuc_t *frt; 77 struct alist_s *alist; 78 u_short port; 79 struct { 80 u_short p1; 81 u_short p2; 82 int pc; 83 } pc; 84 struct { 85 union i6addr a; 86 union i6addr m; 87 } ipp; 88 union i6addr ip6; 89 struct { 90 char *if1; 91 char *if2; 92 } ifs; 93}; 94 95%type <port> portnum 96%type <num> facility priority icmpcode seclevel secname icmptype 97%type <num> opt compare range opttype flagset optlist ipv6hdrlist ipv6hdr 98%type <num> portc porteq 99%type <ipa> hostname ipv4 ipv4mask ipv4_16 ipv4_24 100%type <ip6> ipv6mask 101%type <ipp> addr ipaddr 102%type <str> servicename name interfacename 103%type <pc> portrange portcomp 104%type <alist> addrlist poollist 105%type <ifs> onname 106 107%token <num> YY_NUMBER YY_HEX 108%token <str> YY_STR 109%token YY_COMMENT 110%token YY_CMP_EQ YY_CMP_NE YY_CMP_LE YY_CMP_GE YY_CMP_LT YY_CMP_GT 111%token YY_RANGE_OUT YY_RANGE_IN 112%token <ip6> YY_IPV6 113 114%token IPFY_PASS IPFY_BLOCK IPFY_COUNT IPFY_CALL IPFY_NOMATCH 115%token IPFY_RETICMP IPFY_RETRST IPFY_RETICMPASDST 116%token IPFY_IN IPFY_OUT 117%token IPFY_QUICK IPFY_ON IPFY_OUTVIA IPFY_INVIA 118%token IPFY_DUPTO IPFY_TO IPFY_FROUTE IPFY_REPLY_TO IPFY_ROUTETO 119%token IPFY_TOS IPFY_TTL IPFY_PROTO 120%token IPFY_HEAD IPFY_GROUP 121%token IPFY_AUTH IPFY_PREAUTH 122%token IPFY_LOG IPFY_BODY IPFY_FIRST IPFY_LEVEL IPFY_ORBLOCK 123%token IPFY_LOGTAG IPFY_MATCHTAG IPFY_SETTAG IPFY_SKIP 124%token IPFY_FROM IPFY_ALL IPFY_ANY IPFY_BPFV4 IPFY_BPFV6 IPFY_POOL IPFY_HASH 125%token IPFY_PPS 126%token IPFY_ESP IPFY_AH 127%token IPFY_WITH IPFY_AND IPFY_NOT IPFY_NO IPFY_OPT 128%token IPFY_TCPUDP IPFY_TCP IPFY_UDP 129%token IPFY_FLAGS IPFY_MULTICAST 130%token IPFY_MASK IPFY_BROADCAST IPFY_NETWORK IPFY_NETMASKED IPFY_PEER 131%token IPFY_PORT 132%token IPFY_NOW 133%token IPFY_ICMP IPFY_ICMPTYPE IPFY_ICMPCODE 134%token IPFY_IPOPTS IPFY_SHORT IPFY_NAT IPFY_BADSRC IPFY_LOWTTL IPFY_FRAG 135%token IPFY_MBCAST IPFY_BAD IPFY_BADNAT IPFY_OOW IPFY_NEWISN IPFY_NOICMPERR 136%token IPFY_KEEP IPFY_STATE IPFY_FRAGS IPFY_LIMIT IPFY_STRICT IPFY_AGE 137%token IPFY_SYNC IPFY_FRAGBODY 138%token IPFY_IPOPT_NOP IPFY_IPOPT_RR IPFY_IPOPT_ZSU IPFY_IPOPT_MTUP 139%token IPFY_IPOPT_MTUR IPFY_IPOPT_ENCODE IPFY_IPOPT_TS IPFY_IPOPT_TR 140%token IPFY_IPOPT_SEC IPFY_IPOPT_LSRR IPFY_IPOPT_ESEC IPFY_IPOPT_CIPSO 141%token IPFY_IPOPT_SATID IPFY_IPOPT_SSRR IPFY_IPOPT_ADDEXT IPFY_IPOPT_VISA 142%token IPFY_IPOPT_IMITD IPFY_IPOPT_EIP IPFY_IPOPT_FINN IPFY_IPOPT_DPS 143%token IPFY_IPOPT_SDB IPFY_IPOPT_NSAPA IPFY_IPOPT_RTRALRT IPFY_IPOPT_UMP 144%token IPFY_SECCLASS IPFY_SEC_UNC IPFY_SEC_CONF IPFY_SEC_RSV1 IPFY_SEC_RSV2 145%token IPFY_SEC_RSV4 IPFY_SEC_SEC IPFY_SEC_TS IPFY_SEC_RSV3 146 147%token IPF6_V6HDRS IPFY_IPV6OPT IPFY_IPV6OPT_DSTOPTS IPFY_IPV6OPT_HOPOPTS 148%token IPFY_IPV6OPT_IPV6 IPFY_IPV6OPT_NONE IPFY_IPV6OPT_ROUTING 149%token IPFY_IPV6OPT_MOBILITY IPFY_IPV6OPT_ESP IPFY_IPV6OPT_FRAG 150 151%token IPFY_ICMPT_UNR IPFY_ICMPT_ECHO IPFY_ICMPT_ECHOR IPFY_ICMPT_SQUENCH 152%token IPFY_ICMPT_REDIR IPFY_ICMPT_TIMEX IPFY_ICMPT_PARAMP IPFY_ICMPT_TIMEST 153%token IPFY_ICMPT_TIMESTREP IPFY_ICMPT_INFOREQ IPFY_ICMPT_INFOREP 154%token IPFY_ICMPT_MASKREQ IPFY_ICMPT_MASKREP IPFY_ICMPT_ROUTERAD 155%token IPFY_ICMPT_ROUTERSOL 156 157%token IPFY_ICMPC_NETUNR IPFY_ICMPC_HSTUNR IPFY_ICMPC_PROUNR IPFY_ICMPC_PORUNR 158%token IPFY_ICMPC_NEEDF IPFY_ICMPC_SRCFAIL IPFY_ICMPC_NETUNK IPFY_ICMPC_HSTUNK 159%token IPFY_ICMPC_ISOLATE IPFY_ICMPC_NETPRO IPFY_ICMPC_HSTPRO 160%token IPFY_ICMPC_NETTOS IPFY_ICMPC_HSTTOS IPFY_ICMPC_FLTPRO IPFY_ICMPC_HSTPRE 161%token IPFY_ICMPC_CUTPRE 162 163%token IPFY_FAC_KERN IPFY_FAC_USER IPFY_FAC_MAIL IPFY_FAC_DAEMON IPFY_FAC_AUTH 164%token IPFY_FAC_SYSLOG IPFY_FAC_LPR IPFY_FAC_NEWS IPFY_FAC_UUCP IPFY_FAC_CRON 165%token IPFY_FAC_LOCAL0 IPFY_FAC_LOCAL1 IPFY_FAC_LOCAL2 IPFY_FAC_LOCAL3 166%token IPFY_FAC_LOCAL4 IPFY_FAC_LOCAL5 IPFY_FAC_LOCAL6 IPFY_FAC_LOCAL7 167%token IPFY_FAC_SECURITY IPFY_FAC_FTP IPFY_FAC_AUTHPRIV IPFY_FAC_AUDIT 168%token IPFY_FAC_LFMT IPFY_FAC_CONSOLE 169 170%token IPFY_PRI_EMERG IPFY_PRI_ALERT IPFY_PRI_CRIT IPFY_PRI_ERR IPFY_PRI_WARN 171%token IPFY_PRI_NOTICE IPFY_PRI_INFO IPFY_PRI_DEBUG 172%% 173file: line 174 | assign 175 | file line 176 | file assign 177 ; 178 179line: rule { while ((fr = frtop) != NULL) { 180 frtop = fr->fr_next; 181 fr->fr_next = NULL; 182 (*ipfaddfunc)(ipffd, ipfioctl[IPL_LOGIPF], fr); 183 fr->fr_next = frold; 184 frold = fr; 185 } 186 resetlexer(); 187 } 188 | YY_COMMENT 189 ; 190 191xx: { newrule(); } 192 ; 193 194assign: YY_STR assigning YY_STR ';' { set_variable($1, $3); 195 resetlexer(); 196 free($1); 197 free($3); 198 yyvarnext = 0; 199 } 200 ; 201 202assigning: 203 '=' { yyvarnext = 1; } 204 ; 205 206rule: inrule eol 207 | outrule eol 208 ; 209 210eol: | ';' 211 ; 212 213inrule: 214 rulehead markin inopts rulemain ruletail intag ruletail2 215 ; 216 217outrule: 218 rulehead markout outopts rulemain ruletail outtag ruletail2 219 ; 220 221rulehead: 222 xx collection action 223 | xx insert collection action 224 ; 225 226markin: IPFY_IN { fr->fr_flags |= FR_INQUE; } 227 ; 228 229markout: 230 IPFY_OUT { fr->fr_flags |= FR_OUTQUE; } 231 ; 232 233rulemain: 234 ipfrule 235 | bpfrule 236 ; 237 238ipfrule: 239 tos ttl proto ip 240 ; 241 242bpfrule: 243 IPFY_BPFV4 '{' YY_STR '}' { dobpf(4, $3); free($3); } 244 | IPFY_BPFV6 '{' YY_STR '}' { dobpf(6, $3); free($3); } 245 ; 246 247ruletail: 248 with keep head group 249 ; 250 251ruletail2: 252 pps age new 253 ; 254 255intag: settagin matchtagin 256 ; 257 258outtag: settagout matchtagout 259 ; 260 261insert: 262 '@' YY_NUMBER { fr->fr_hits = (U_QUAD_T)$2 + 1; } 263 ; 264 265collection: 266 | YY_NUMBER { fr->fr_collect = $1; } 267 ; 268 269action: block 270 | IPFY_PASS { fr->fr_flags |= FR_PASS; } 271 | IPFY_NOMATCH { fr->fr_flags |= FR_NOMATCH; } 272 | log 273 | IPFY_COUNT { fr->fr_flags |= FR_ACCOUNT; } 274 | auth 275 | IPFY_SKIP YY_NUMBER { fr->fr_flags |= FR_SKIP; 276 fr->fr_arg = $2; } 277 | IPFY_CALL func 278 | IPFY_CALL IPFY_NOW func { fr->fr_flags |= FR_CALLNOW; } 279 ; 280 281block: blocked 282 | blocked blockreturn 283 ; 284 285blocked: 286 IPFY_BLOCK { fr->fr_flags = FR_BLOCK; } 287 ; 288blockreturn: 289 IPFY_RETICMP { fr->fr_flags |= FR_RETICMP; } 290 | IPFY_RETICMP returncode { fr->fr_flags |= FR_RETICMP; } 291 | IPFY_RETICMPASDST { fr->fr_flags |= FR_FAKEICMP; } 292 | IPFY_RETICMPASDST returncode { fr->fr_flags |= FR_FAKEICMP; } 293 | IPFY_RETRST { fr->fr_flags |= FR_RETRST; } 294 ; 295 296log: IPFY_LOG { fr->fr_flags |= FR_LOG; } 297 | IPFY_LOG logoptions { fr->fr_flags |= FR_LOG; } 298 ; 299 300auth: IPFY_AUTH { fr->fr_flags |= FR_AUTH; } 301 | IPFY_AUTH blockreturn { fr->fr_flags |= FR_AUTH;} 302 | IPFY_PREAUTH { fr->fr_flags |= FR_PREAUTH; } 303 ; 304 305func: YY_STR '/' YY_NUMBER { fr->fr_func = nametokva($1, 306 ipfioctl[IPL_LOGIPF]); 307 fr->fr_arg = $3; 308 free($1); } 309 ; 310 311inopts: 312 | inopts inopt 313 ; 314 315inopt: 316 logopt 317 | quick 318 | on 319 | dup 320 | froute 321 | proute 322 | replyto 323 ; 324 325outopts: 326 | outopts outopt 327 ; 328 329outopt: 330 logopt 331 | quick 332 | on 333 | dup 334 | proute 335 | replyto 336 ; 337 338tos: | settos YY_NUMBER { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 339 | settos YY_HEX { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 340 | settos lstart toslist lend 341 ; 342 343settos: IPFY_TOS { setipftype(); } 344 ; 345 346toslist: 347 YY_NUMBER { DOALL(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 348 | YY_HEX { DOREM(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 349 | toslist lmore YY_NUMBER 350 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 351 | toslist lmore YY_HEX 352 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 353 ; 354 355ttl: | setttl YY_NUMBER 356 { DOALL(fr->fr_ttl = $2; fr->fr_mttl = 0xff;) } 357 | setttl lstart ttllist lend 358 ; 359 360lstart: '(' { newlist = 1; fr = frc; added = 0; } 361 ; 362 363lend: ')' { nrules += added; } 364 ; 365 366lmore: lanother { if (newlist == 1) { 367 newlist = 0; 368 } 369 fr = addrule(); 370 if (yycont != NULL) 371 *yycont = 1; 372 } 373 ; 374 375lanother: 376 | ',' 377 ; 378 379setttl: IPFY_TTL { setipftype(); } 380 ; 381 382ttllist: 383 YY_NUMBER { DOREM(fr->fr_ttl = $1; fr->fr_mttl = 0xff;) } 384 | ttllist lmore YY_NUMBER 385 { DOREM(fr->fr_ttl = $3; fr->fr_mttl = 0xff;) } 386 ; 387 388proto: | protox protocol { yyresetdict(); } 389 ; 390 391protox: IPFY_PROTO { setipftype(); 392 fr = frc; 393 yysetdict(NULL); } 394 ; 395 396ip: srcdst flags icmp 397 ; 398 399group: | IPFY_GROUP YY_STR { DOALL(strncpy(fr->fr_group, $2, \ 400 FR_GROUPLEN); \ 401 fillgroup(fr);); 402 free($2); } 403 | IPFY_GROUP YY_NUMBER { DOALL(sprintf(fr->fr_group, "%d", \ 404 $2); \ 405 fillgroup(fr);) } 406 ; 407 408head: | IPFY_HEAD YY_STR { DOALL(strncpy(fr->fr_grhead, $2, \ 409 FR_GROUPLEN);); 410 free($2); } 411 | IPFY_HEAD YY_NUMBER { DOALL(sprintf(fr->fr_grhead, "%d", \ 412 $2);) } 413 ; 414 415settagin: 416 | IPFY_SETTAG '(' taginlist ')' 417 ; 418 419taginlist: 420 taginspec 421 | taginlist ',' taginspec 422 ; 423 424taginspec: 425 logtag 426 ; 427 428nattag: IPFY_NAT '=' YY_STR { DOALL(strncpy(fr->fr_nattag.ipt_tag,\ 429 $3, IPFTAG_LEN);); 430 free($3); } 431 | IPFY_NAT '=' YY_NUMBER { DOALL(sprintf(fr->fr_nattag.ipt_tag,\ 432 "%d", $3 & 0xffffffff);) } 433 ; 434 435logtag: IPFY_LOG '=' YY_NUMBER { DOALL(fr->fr_logtag = $3;) } 436 ; 437 438settagout: 439 | IPFY_SETTAG '(' tagoutlist ')' 440 ; 441 442tagoutlist: 443 tagoutspec 444 | tagoutlist ',' tagoutspec 445 ; 446 447tagoutspec: 448 logtag 449 | nattag 450 ; 451 452matchtagin: 453 | IPFY_MATCHTAG '(' tagoutlist ')' 454 ; 455 456matchtagout: 457 | IPFY_MATCHTAG '(' taginlist ')' 458 ; 459 460pps: | IPFY_PPS YY_NUMBER { DOALL(fr->fr_pps = $2;) } 461 ; 462 463new: | savegroup file restoregroup 464 ; 465 466savegroup: 467 '{' 468 ; 469 470restoregroup: 471 '}' 472 ; 473 474logopt: log 475 ; 476 477quick: 478 IPFY_QUICK { fr->fr_flags |= FR_QUICK; } 479 ; 480 481on: IPFY_ON onname 482 | IPFY_ON lstart onlist lend 483 | IPFY_ON onname IPFY_INVIA vianame 484 | IPFY_ON onname IPFY_OUTVIA vianame 485 ; 486 487onlist: onname { DOREM(strncpy(fr->fr_ifnames[0], $1.if1, \ 488 sizeof(fr->fr_ifnames[0])); \ 489 if ($1.if2 != NULL) { \ 490 strncpy(fr->fr_ifnames[1], \ 491 $1.if2, \ 492 sizeof(fr->fr_ifnames[1]));\ 493 } \ 494 ) } 495 | onlist lmore onname { DOREM(strncpy(fr->fr_ifnames[0], $3.if1, \ 496 sizeof(fr->fr_ifnames[0])); \ 497 if ($3.if2 != NULL) { \ 498 strncpy(fr->fr_ifnames[1], \ 499 $3.if2, \ 500 sizeof(fr->fr_ifnames[1]));\ 501 } \ 502 ) } 503 ; 504 505onname: interfacename 506 { strncpy(fr->fr_ifnames[0], $1, sizeof(fr->fr_ifnames[0])); 507 $$.if1 = fr->fr_ifnames[0]; 508 $$.if2 = NULL; 509 free($1); 510 } 511 | interfacename ',' interfacename 512 { strncpy(fr->fr_ifnames[0], $1, sizeof(fr->fr_ifnames[0])); 513 $$.if1 = fr->fr_ifnames[0]; 514 free($1); 515 strncpy(fr->fr_ifnames[1], $3, sizeof(fr->fr_ifnames[1])); 516 $$.if1 = fr->fr_ifnames[1]; 517 free($3); 518 } 519 ; 520 521vianame: 522 name 523 { strncpy(fr->fr_ifnames[2], $1, sizeof(fr->fr_ifnames[2])); 524 free($1); 525 } 526 | name ',' name 527 { strncpy(fr->fr_ifnames[2], $1, sizeof(fr->fr_ifnames[2])); 528 free($1); 529 strncpy(fr->fr_ifnames[3], $3, sizeof(fr->fr_ifnames[3])); 530 free($3); 531 } 532 ; 533 534dup: IPFY_DUPTO name 535 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 536 free($2); 537 } 538 | IPFY_DUPTO name duptoseparator hostname 539 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 540 fr->fr_dif.fd_ip = $4; 541 yyexpectaddr = 0; 542 free($2); 543 } 544 | IPFY_DUPTO name duptoseparator YY_IPV6 545 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 546 bcopy(&$4, &fr->fr_dif.fd_ip6, sizeof(fr->fr_dif.fd_ip6)); 547 yyexpectaddr = 0; 548 free($2); 549 } 550 ; 551 552duptoseparator: 553 ':' { yyexpectaddr = 1; yycont = &yyexpectaddr; resetaddr(); } 554 ; 555 556froute: IPFY_FROUTE { fr->fr_flags |= FR_FASTROUTE; } 557 ; 558 559proute: routeto name 560 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 561 free($2); 562 } 563 | routeto name duptoseparator hostname 564 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 565 fr->fr_tif.fd_ip = $4; 566 yyexpectaddr = 0; 567 free($2); 568 } 569 | routeto name duptoseparator YY_IPV6 570 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 571 bcopy(&$4, &fr->fr_tif.fd_ip6, sizeof(fr->fr_tif.fd_ip6)); 572 yyexpectaddr = 0; 573 free($2); 574 } 575 ; 576 577routeto: 578 IPFY_TO 579 | IPFY_ROUTETO 580 ; 581 582replyto: 583 IPFY_REPLY_TO name 584 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 585 free($2); 586 } 587 | IPFY_REPLY_TO name duptoseparator hostname 588 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 589 fr->fr_rif.fd_ip = $4; 590 free($2); 591 } 592 ; 593 594logoptions: 595 logoption 596 | logoptions logoption 597 ; 598 599logoption: 600 IPFY_BODY { fr->fr_flags |= FR_LOGBODY; } 601 | IPFY_FIRST { fr->fr_flags |= FR_LOGFIRST; } 602 | IPFY_ORBLOCK { fr->fr_flags |= FR_LOGORBLOCK; } 603 | level loglevel { unsetsyslog(); } 604 ; 605 606returncode: 607 starticmpcode icmpcode ')' { fr->fr_icode = $2; yyresetdict(); } 608 ; 609 610starticmpcode: 611 '(' { yysetdict(icmpcodewords); } 612 ; 613 614srcdst: | IPFY_ALL 615 | fromto 616 ; 617 618protocol: 619 YY_NUMBER { DOREM(fr->fr_proto = $1; \ 620 fr->fr_mproto = 0xff;) } 621 | YY_STR { if (!strcmp($1, "tcp-udp")) { 622 DOREM(fr->fr_flx |= FI_TCPUDP; \ 623 fr->fr_mflx |= FI_TCPUDP;) 624 } else { 625 int p = getproto($1); 626 if (p == -1) 627 yyerror("protocol unknown"); 628 DOREM(fr->fr_proto = p; \ 629 fr->fr_mproto = 0xff;) 630 } 631 free($1); 632 } 633 | YY_STR nextstring YY_STR 634 { if (!strcmp($1, "tcp") && 635 !strcmp($3, "udp")) { 636 DOREM(fr->fr_flx |= FI_TCPUDP; \ 637 fr->fr_mflx |= FI_TCPUDP;) 638 } else 639 YYERROR; 640 free($1); 641 free($3); 642 } 643 ; 644 645nextstring: 646 '/' { yysetdict(NULL); } 647 ; 648 649fromto: from srcobject to dstobject { yyexpectaddr = 0; yycont = NULL; } 650 | to dstobject { yyexpectaddr = 0; yycont = NULL; } 651 | from srcobject { yyexpectaddr = 0; yycont = NULL; } 652 ; 653 654from: IPFY_FROM { setipftype(); 655 if (fr == NULL) 656 fr = frc; 657 yyexpectaddr = 1; 658 if (yydebug) 659 printf("set yyexpectaddr\n"); 660 yycont = &yyexpectaddr; 661 yysetdict(addrwords); 662 resetaddr(); } 663 ; 664 665to: IPFY_TO { if (fr == NULL) 666 fr = frc; 667 yyexpectaddr = 1; 668 if (yydebug) 669 printf("set yyexpectaddr\n"); 670 yycont = &yyexpectaddr; 671 yysetdict(addrwords); 672 resetaddr(); } 673 ; 674 675with: | andwith withlist 676 ; 677 678andwith: 679 IPFY_WITH { nowith = 0; setipftype(); } 680 | IPFY_AND { nowith = 0; setipftype(); } 681 ; 682 683flags: | startflags flagset 684 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 685 | startflags flagset '/' flagset 686 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 687 | startflags '/' flagset 688 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 689 | startflags YY_NUMBER 690 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 691 | startflags '/' YY_NUMBER 692 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 693 | startflags YY_NUMBER '/' YY_NUMBER 694 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 695 | startflags flagset '/' YY_NUMBER 696 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 697 | startflags YY_NUMBER '/' flagset 698 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 699 ; 700 701startflags: 702 IPFY_FLAGS { if (frc->fr_type != FR_T_IPF) 703 yyerror("flags with non-ipf type rule"); 704 if (frc->fr_proto != IPPROTO_TCP) 705 yyerror("flags with non-TCP rule"); 706 } 707 ; 708 709flagset: 710 YY_STR { $$ = tcpflags($1); free($1); } 711 | YY_HEX { $$ = $1; } 712 ; 713 714srcobject: 715 { yyresetdict(); } fromport 716 | srcaddr srcport 717 | '!' srcaddr srcport 718 { DOALL(fr->fr_flags |= FR_NOTSRCIP;) } 719 ; 720 721srcaddr: 722 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_src, sizeof($1.a)); \ 723 bcopy(&($1.m), &fr->fr_mip.fi_src, sizeof($1.m)); \ 724 if (dynamic != -1) { \ 725 fr->fr_satype = ifpflag; \ 726 fr->fr_ipf->fri_sifpidx = dynamic; \ 727 } else if (pooled || hashed) \ 728 fr->fr_satype = FRI_LOOKUP;) 729 } 730 | lstart srcaddrlist lend 731 ; 732 733srcaddrlist: 734 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_src, sizeof($1.a)); \ 735 bcopy(&($1.m), &fr->fr_mip.fi_src, sizeof($1.m)); \ 736 if (dynamic != -1) { \ 737 fr->fr_satype = ifpflag; \ 738 fr->fr_ipf->fri_sifpidx = dynamic; \ 739 } else if (pooled || hashed) \ 740 fr->fr_satype = FRI_LOOKUP;) 741 } 742 | srcaddrlist lmore addr 743 { DOREM(bcopy(&($3.a), &fr->fr_ip.fi_src, sizeof($3.a)); \ 744 bcopy(&($3.m), &fr->fr_mip.fi_src, sizeof($3.m)); \ 745 if (dynamic != -1) { \ 746 fr->fr_satype = ifpflag; \ 747 fr->fr_ipf->fri_sifpidx = dynamic; \ 748 } else if (pooled || hashed) \ 749 fr->fr_satype = FRI_LOOKUP;) 750 } 751 ; 752 753srcport: 754 | portcomp 755 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 756 | portrange 757 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 758 fr->fr_stop = $1.p2;) } 759 | porteq lstart srcportlist lend 760 { yyresetdict(); } 761 ; 762 763fromport: 764 portcomp 765 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 766 | portrange 767 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 768 fr->fr_stop = $1.p2;) } 769 | porteq lstart srcportlist lend 770 { yyresetdict(); } 771 ; 772 773srcportlist: 774 portnum { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $1;) } 775 | srcportlist lmore portnum 776 { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $3;) } 777 ; 778 779dstobject: 780 { yyresetdict(); } toport 781 | dstaddr dstport 782 | '!' dstaddr dstport 783 { DOALL(fr->fr_flags |= FR_NOTDSTIP;) } 784 ; 785 786dstaddr: 787 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_dst, sizeof($1.a)); \ 788 bcopy(&($1.m), &fr->fr_mip.fi_dst, sizeof($1.m)); \ 789 if (dynamic != -1) { \ 790 fr->fr_datype = ifpflag; \ 791 fr->fr_ipf->fri_difpidx = dynamic; \ 792 } else if (pooled || hashed) \ 793 fr->fr_datype = FRI_LOOKUP;) 794 } 795 | lstart dstaddrlist lend 796 ; 797 798dstaddrlist: 799 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_dst, sizeof($1.a)); \ 800 bcopy(&($1.m), &fr->fr_mip.fi_dst, sizeof($1.m)); \ 801 if (dynamic != -1) { \ 802 fr->fr_datype = ifpflag; \ 803 fr->fr_ipf->fri_difpidx = dynamic; \ 804 } else if (pooled || hashed) \ 805 fr->fr_datype = FRI_LOOKUP;) 806 } 807 | dstaddrlist lmore addr 808 { DOREM(bcopy(&($3.a), &fr->fr_ip.fi_dst, sizeof($3.a)); \ 809 bcopy(&($3.m), &fr->fr_mip.fi_dst, sizeof($3.m)); \ 810 if (dynamic != -1) { \ 811 fr->fr_datype = ifpflag; \ 812 fr->fr_ipf->fri_difpidx = dynamic; \ 813 } else if (pooled || hashed) \ 814 fr->fr_datype = FRI_LOOKUP;) 815 } 816 ; 817 818 819dstport: 820 | portcomp 821 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 822 | portrange 823 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 824 fr->fr_dtop = $1.p2;) } 825 | porteq lstart dstportlist lend 826 { yyresetdict(); } 827 ; 828 829toport: 830 portcomp 831 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 832 | portrange 833 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 834 fr->fr_dtop = $1.p2;) } 835 | porteq lstart dstportlist lend 836 { yyresetdict(); } 837 ; 838 839dstportlist: 840 portnum { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $1;) } 841 | dstportlist lmore portnum 842 { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $3;) } 843 ; 844 845addr: pool '/' YY_NUMBER { pooled = 1; 846 $$.a.iplookuptype = IPLT_POOL; 847 $$.a.iplookupsubtype = 0; 848 $$.a.iplookupnum = $3; } 849 | pool '/' YY_STR { pooled = 1; 850 $$.a.iplookuptype = IPLT_POOL; 851 $$.a.iplookupsubtype = 1; 852 strncpy($$.a.iplookupname, $3, 853 sizeof($$.a.iplookupname)); 854 } 855 | pool '=' '(' poollist ')' { pooled = 1; 856 $$.a.iplookuptype = IPLT_POOL; 857 $$.a.iplookupsubtype = 0; 858 $$.a.iplookupnum = makepool($4); } 859 | hash '/' YY_NUMBER { hashed = 1; 860 $$.a.iplookuptype = IPLT_HASH; 861 $$.a.iplookupsubtype = 0; 862 $$.a.iplookupnum = $3; } 863 | hash '/' YY_STR { pooled = 1; 864 $$.a.iplookuptype = IPLT_HASH; 865 $$.a.iplookupsubtype = 1; 866 strncpy($$.a.iplookupname, $3, 867 sizeof($$.a.iplookupname)); 868 } 869 | hash '=' '(' addrlist ')' { hashed = 1; 870 $$.a.iplookuptype = IPLT_HASH; 871 $$.a.iplookupsubtype = 0; 872 $$.a.iplookupnum = makehash($4); } 873 | ipaddr { bcopy(&$1, &$$, sizeof($$)); 874 yyexpectaddr = 0; } 875 ; 876 877ipaddr: IPFY_ANY { bzero(&($$), sizeof($$)); 878 yyresetdict(); 879 yyexpectaddr = 0; } 880 | hostname { $$.a.in4 = $1; 881 $$.m.in4_addr = 0xffffffff; 882 yyexpectaddr = 0; } 883 | hostname { yyresetdict(); 884 $$.a.in4_addr = $1.s_addr; } 885 maskspace { yysetdict(maskwords); } 886 ipv4mask { $$.m.in4_addr = $5.s_addr; 887 $$.a.in4_addr &= $5.s_addr; 888 yyresetdict(); 889 yyexpectaddr = 0; } 890 | YY_IPV6 { bcopy(&$1, &$$.a, sizeof($$.a)); 891 fill6bits(128, (u_32_t *)&$$.m); 892 yyresetdict(); 893 yyexpectaddr = 0; } 894 | YY_IPV6 { yyresetdict(); 895 bcopy(&$1, &$$.a, sizeof($$.a)); } 896 maskspace { yysetdict(maskwords); } 897 ipv6mask { bcopy(&$5, &$$.m, sizeof($$.m)); 898 yyresetdict(); 899 yyexpectaddr = 0; } 900 ; 901maskspace: 902 '/' 903 | IPFY_MASK 904 ; 905 906ipv4mask: 907 ipv4 { $$ = $1; } 908 | YY_HEX { $$.s_addr = htonl($1); } 909 | YY_NUMBER { ntomask(4, $1, (u_32_t *)&$$); } 910 | IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 911 $$.s_addr = 0; 912 ifpflag = FRI_BROADCAST; 913 } else 914 YYERROR; 915 } 916 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 917 $$.s_addr = 0; 918 ifpflag = FRI_NETWORK; 919 } else 920 YYERROR; 921 } 922 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 923 $$.s_addr = 0; 924 ifpflag = FRI_NETMASKED; 925 } else 926 YYERROR; 927 } 928 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 929 $$.s_addr = 0; 930 ifpflag = FRI_PEERADDR; 931 } else 932 YYERROR; 933 } 934 ; 935 936ipv6mask: 937 YY_NUMBER { ntomask(6, $1, $$.i6); } 938 | IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 939 bzero(&$$, sizeof($$)); 940 ifpflag = FRI_BROADCAST; 941 } else 942 YYERROR; 943 } 944 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 945 bzero(&$$, sizeof($$)); 946 ifpflag = FRI_BROADCAST; 947 } else 948 YYERROR; 949 } 950 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 951 bzero(&$$, sizeof($$)); 952 ifpflag = FRI_BROADCAST; 953 } else 954 YYERROR; 955 } 956 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 957 bzero(&$$, sizeof($$)); 958 ifpflag = FRI_BROADCAST; 959 } else 960 YYERROR; 961 } 962 ; 963 964hostname: 965 ipv4 { $$ = $1; } 966 | YY_NUMBER { $$.s_addr = $1; } 967 | YY_HEX { $$.s_addr = $1; } 968 | YY_STR { $$.s_addr = lookuphost($1); 969 free($1); 970 } 971 ; 972 973addrlist: 974 ipaddr { $$ = newalist(NULL); 975 bcopy(&($1.a), &($$->al_i6addr), sizeof($1.a)); 976 bcopy(&($1.m), &($$->al_i6mask), sizeof($1.m)); } 977 | addrlist ',' ipaddr 978 { $$ = newalist($1); 979 bcopy(&($3.a), &($$->al_i6addr), sizeof($3.a)); 980 bcopy(&($3.m), &($$->al_i6mask), sizeof($3.m)); } 981 ; 982 983pool: IPFY_POOL { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 984 ; 985 986hash: IPFY_HASH { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 987 ; 988 989poollist: 990 ipaddr { $$ = newalist(NULL); 991 bcopy(&($1.a), &($$->al_i6addr), sizeof($1.a)); 992 bcopy(&($1.m), &($$->al_i6mask), sizeof($1.m)); } 993 | '!' ipaddr { $$ = newalist(NULL); 994 $$->al_not = 1; 995 bcopy(&($2.a), &($$->al_i6addr), sizeof($2.a)); 996 bcopy(&($2.m), &($$->al_i6mask), sizeof($2.m)); } 997 | poollist ',' ipaddr 998 { $$ = newalist($1); 999 bcopy(&($3.a), &($$->al_i6addr), sizeof($3.a)); 1000 bcopy(&($3.m), &($$->al_i6mask), sizeof($3.m)); } 1001 | poollist ',' '!' ipaddr 1002 { $$ = newalist($1); 1003 $$->al_not = 1; 1004 bcopy(&($4.a), &($$->al_i6addr), sizeof($4.a)); 1005 bcopy(&($4.m), &($$->al_i6mask), sizeof($4.m)); } 1006 ; 1007 1008port: IPFY_PORT { yyexpectaddr = 0; 1009 yycont = NULL; 1010 } 1011 ; 1012 1013portc: port compare { $$ = $2; 1014 yysetdict(NULL); } 1015 | porteq { $$ = $1; } 1016 ; 1017 1018porteq: port '=' { $$ = FR_EQUAL; 1019 yysetdict(NULL); } 1020 ; 1021 1022portr: IPFY_PORT { yyexpectaddr = 0; 1023 yycont = NULL; 1024 yysetdict(NULL); } 1025 ; 1026 1027portcomp: 1028 portc portnum { $$.pc = $1; 1029 $$.p1 = $2; 1030 yyresetdict(); } 1031 ; 1032 1033portrange: 1034 portr portnum range portnum { $$.p1 = $2; 1035 $$.pc = $3; 1036 $$.p2 = $4; 1037 yyresetdict(); } 1038 ; 1039 1040icmp: | itype icode 1041 ; 1042 1043itype: seticmptype icmptype 1044 { DOALL(fr->fr_icmp = htons($2 << 8); fr->fr_icmpm = htons(0xff00);); 1045 yyresetdict(); 1046 } 1047 | seticmptype lstart typelist lend { yyresetdict(); } 1048 ; 1049 1050seticmptype: 1051 IPFY_ICMPTYPE { setipftype(); 1052 yysetdict(icmptypewords); } 1053 ; 1054 1055icode: | seticmpcode icmpcode 1056 { DOALL(fr->fr_icmp |= htons($2); fr->fr_icmpm |= htons(0xff);); 1057 yyresetdict(); 1058 } 1059 | seticmpcode lstart codelist lend { yyresetdict(); } 1060 ; 1061 1062seticmpcode: 1063 IPFY_ICMPCODE { yysetdict(icmpcodewords); } 1064 ; 1065 1066typelist: 1067 icmptype 1068 { DOREM(fr->fr_icmp = htons($1 << 8); fr->fr_icmpm = htons(0xff00);) } 1069 | typelist lmore icmptype 1070 { DOREM(fr->fr_icmp = htons($3 << 8); fr->fr_icmpm = htons(0xff00);) } 1071 ; 1072 1073codelist: 1074 icmpcode 1075 { DOREM(fr->fr_icmp |= htons($1); fr->fr_icmpm |= htons(0xff);) } 1076 | codelist lmore icmpcode 1077 { DOREM(fr->fr_icmp &= htons(0xff00); fr->fr_icmp |= htons($3); \ 1078 fr->fr_icmpm |= htons(0xff);) } 1079 ; 1080 1081age: | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1082 fr->fr_age[1] = $2;) } 1083 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1084 { DOALL(fr->fr_age[0] = $2; \ 1085 fr->fr_age[1] = $4;) } 1086 ; 1087 1088keep: | IPFY_KEEP keepstate keep 1089 | IPFY_KEEP keepfrag keep 1090 ; 1091 1092keepstate: 1093 IPFY_STATE stateoptlist { DOALL(fr->fr_flags |= FR_KEEPSTATE;)} 1094 ; 1095 1096keepfrag: 1097 IPFY_FRAGS fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1098 | IPFY_FRAG fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1099 ; 1100 1101fragoptlist: 1102 | '(' fragopts ')' 1103 ; 1104 1105fragopts: 1106 fragopt lanother fragopts 1107 | fragopt 1108 ; 1109 1110fragopt: 1111 IPFY_STRICT { DOALL(fr->fr_flags |= FR_FRSTRICT;) } 1112 ; 1113 1114stateoptlist: 1115 | '(' stateopts ')' 1116 ; 1117 1118stateopts: 1119 stateopt lanother stateopts 1120 | stateopt 1121 ; 1122 1123stateopt: 1124 IPFY_LIMIT YY_NUMBER { DOALL(fr->fr_statemax = $2;) } 1125 | IPFY_STRICT { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1126 YYERROR; \ 1127 } else \ 1128 fr->fr_flags |= FR_STSTRICT;) 1129 } 1130 | IPFY_NEWISN { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1131 YYERROR; \ 1132 } else \ 1133 fr->fr_flags |= FR_NEWISN;) 1134 } 1135 | IPFY_NOICMPERR { DOALL(fr->fr_flags |= FR_NOICMPERR;) } 1136 1137 | IPFY_SYNC { DOALL(fr->fr_flags |= FR_STATESYNC;) } 1138 | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1139 fr->fr_age[1] = $2;) } 1140 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1141 { DOALL(fr->fr_age[0] = $2; \ 1142 fr->fr_age[1] = $4;) } 1143 ; 1144 1145portnum: 1146 servicename { if (getport(frc, $1, &($$)) == -1) 1147 yyerror("service unknown"); 1148 $$ = ntohs($$); 1149 free($1); 1150 } 1151 | YY_NUMBER { if ($1 > 65535) /* Unsigned */ 1152 yyerror("invalid port number"); 1153 else 1154 $$ = $1; 1155 } 1156 ; 1157 1158withlist: 1159 withopt { nowith = 0; } 1160 | withlist withopt { nowith = 0; } 1161 | withlist ',' withopt { nowith = 0; } 1162 ; 1163 1164withopt: 1165 opttype { DOALL(fr->fr_flx |= $1; fr->fr_mflx |= $1;) } 1166 | notwith opttype { DOALL(fr->fr_mflx |= $2;) } 1167 | ipopt ipopts { yyresetdict(); } 1168 | notwith ipopt ipopts { yyresetdict(); } 1169 | startv6hdrs ipv6hdrs { yyresetdict(); } 1170 ; 1171 1172ipopt: IPFY_OPT { yysetdict(ipv4optwords); } 1173 ; 1174 1175startv6hdrs: 1176 IPF6_V6HDRS { if (use_inet6 == 0) 1177 yyerror("only available with IPv6"); 1178 yysetdict(ipv6optwords); 1179 } 1180 ; 1181 1182notwith: 1183 IPFY_NOT { nowith = 1; } 1184 | IPFY_NO { nowith = 1; } 1185 ; 1186 1187opttype: 1188 IPFY_IPOPTS { $$ = FI_OPTIONS; } 1189 | IPFY_SHORT { $$ = FI_SHORT; } 1190 | IPFY_NAT { $$ = FI_NATED; } 1191 | IPFY_BAD { $$ = FI_BAD; } 1192 | IPFY_BADNAT { $$ = FI_BADNAT; } 1193 | IPFY_BADSRC { $$ = FI_BADSRC; } 1194 | IPFY_LOWTTL { $$ = FI_LOWTTL; } 1195 | IPFY_FRAG { $$ = FI_FRAG; } 1196 | IPFY_FRAGBODY { $$ = FI_FRAGBODY; } 1197 | IPFY_FRAGS { $$ = FI_FRAG; } 1198 | IPFY_MBCAST { $$ = FI_MBCAST; } 1199 | IPFY_MULTICAST { $$ = FI_MULTICAST; } 1200 | IPFY_BROADCAST { $$ = FI_BROADCAST; } 1201 | IPFY_STATE { $$ = FI_STATE; } 1202 | IPFY_OOW { $$ = FI_OOW; } 1203 ; 1204 1205ipopts: optlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1206 if (!nowith) 1207 fr->fr_ip.fi_optmsk |= $1;) 1208 } 1209 ; 1210 1211optlist: 1212 opt { $$ |= $1; } 1213 | optlist ',' opt { $$ |= $1 | $3; } 1214 ; 1215 1216ipv6hdrs: 1217 ipv6hdrlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1218 if (!nowith) 1219 fr->fr_ip.fi_optmsk |= $1;) 1220 } 1221 ; 1222 1223ipv6hdrlist: 1224 ipv6hdr { $$ |= $1; } 1225 | ipv6hdrlist ',' ipv6hdr { $$ |= $1 | $3; } 1226 ; 1227 1228secname: 1229 seclevel { $$ |= $1; } 1230 | secname ',' seclevel { $$ |= $1 | $3; } 1231 ; 1232 1233seclevel: 1234 IPFY_SEC_UNC { $$ = secbit(IPSO_CLASS_UNCL); } 1235 | IPFY_SEC_CONF { $$ = secbit(IPSO_CLASS_CONF); } 1236 | IPFY_SEC_RSV1 { $$ = secbit(IPSO_CLASS_RES1); } 1237 | IPFY_SEC_RSV2 { $$ = secbit(IPSO_CLASS_RES2); } 1238 | IPFY_SEC_RSV3 { $$ = secbit(IPSO_CLASS_RES3); } 1239 | IPFY_SEC_RSV4 { $$ = secbit(IPSO_CLASS_RES4); } 1240 | IPFY_SEC_SEC { $$ = secbit(IPSO_CLASS_SECR); } 1241 | IPFY_SEC_TS { $$ = secbit(IPSO_CLASS_TOPS); } 1242 ; 1243 1244icmptype: 1245 YY_NUMBER { $$ = $1; } 1246 | IPFY_ICMPT_UNR { $$ = ICMP_UNREACH; } 1247 | IPFY_ICMPT_ECHO { $$ = ICMP_ECHO; } 1248 | IPFY_ICMPT_ECHOR { $$ = ICMP_ECHOREPLY; } 1249 | IPFY_ICMPT_SQUENCH { $$ = ICMP_SOURCEQUENCH; } 1250 | IPFY_ICMPT_REDIR { $$ = ICMP_REDIRECT; } 1251 | IPFY_ICMPT_TIMEX { $$ = ICMP_TIMXCEED; } 1252 | IPFY_ICMPT_PARAMP { $$ = ICMP_PARAMPROB; } 1253 | IPFY_ICMPT_TIMEST { $$ = ICMP_TSTAMP; } 1254 | IPFY_ICMPT_TIMESTREP { $$ = ICMP_TSTAMPREPLY; } 1255 | IPFY_ICMPT_INFOREQ { $$ = ICMP_IREQ; } 1256 | IPFY_ICMPT_INFOREP { $$ = ICMP_IREQREPLY; } 1257 | IPFY_ICMPT_MASKREQ { $$ = ICMP_MASKREQ; } 1258 | IPFY_ICMPT_MASKREP { $$ = ICMP_MASKREPLY; } 1259 | IPFY_ICMPT_ROUTERAD { $$ = ICMP_ROUTERADVERT; } 1260 | IPFY_ICMPT_ROUTERSOL { $$ = ICMP_ROUTERSOLICIT; } 1261 ; 1262 1263icmpcode: 1264 YY_NUMBER { $$ = $1; } 1265 | IPFY_ICMPC_NETUNR { $$ = ICMP_UNREACH_NET; } 1266 | IPFY_ICMPC_HSTUNR { $$ = ICMP_UNREACH_HOST; } 1267 | IPFY_ICMPC_PROUNR { $$ = ICMP_UNREACH_PROTOCOL; } 1268 | IPFY_ICMPC_PORUNR { $$ = ICMP_UNREACH_PORT; } 1269 | IPFY_ICMPC_NEEDF { $$ = ICMP_UNREACH_NEEDFRAG; } 1270 | IPFY_ICMPC_SRCFAIL { $$ = ICMP_UNREACH_SRCFAIL; } 1271 | IPFY_ICMPC_NETUNK { $$ = ICMP_UNREACH_NET_UNKNOWN; } 1272 | IPFY_ICMPC_HSTUNK { $$ = ICMP_UNREACH_HOST_UNKNOWN; } 1273 | IPFY_ICMPC_ISOLATE { $$ = ICMP_UNREACH_ISOLATED; } 1274 | IPFY_ICMPC_NETPRO { $$ = ICMP_UNREACH_NET_PROHIB; } 1275 | IPFY_ICMPC_HSTPRO { $$ = ICMP_UNREACH_HOST_PROHIB; } 1276 | IPFY_ICMPC_NETTOS { $$ = ICMP_UNREACH_TOSNET; } 1277 | IPFY_ICMPC_HSTTOS { $$ = ICMP_UNREACH_TOSHOST; } 1278 | IPFY_ICMPC_FLTPRO { $$ = ICMP_UNREACH_ADMIN_PROHIBIT; } 1279 | IPFY_ICMPC_HSTPRE { $$ = 14; } 1280 | IPFY_ICMPC_CUTPRE { $$ = 15; } 1281 ; 1282 1283opt: 1284 IPFY_IPOPT_NOP { $$ = getoptbyvalue(IPOPT_NOP); } 1285 | IPFY_IPOPT_RR { $$ = getoptbyvalue(IPOPT_RR); } 1286 | IPFY_IPOPT_ZSU { $$ = getoptbyvalue(IPOPT_ZSU); } 1287 | IPFY_IPOPT_MTUP { $$ = getoptbyvalue(IPOPT_MTUP); } 1288 | IPFY_IPOPT_MTUR { $$ = getoptbyvalue(IPOPT_MTUR); } 1289 | IPFY_IPOPT_ENCODE { $$ = getoptbyvalue(IPOPT_ENCODE); } 1290 | IPFY_IPOPT_TS { $$ = getoptbyvalue(IPOPT_TS); } 1291 | IPFY_IPOPT_TR { $$ = getoptbyvalue(IPOPT_TR); } 1292 | IPFY_IPOPT_SEC { $$ = getoptbyvalue(IPOPT_SECURITY); } 1293 | IPFY_IPOPT_LSRR { $$ = getoptbyvalue(IPOPT_LSRR); } 1294 | IPFY_IPOPT_ESEC { $$ = getoptbyvalue(IPOPT_E_SEC); } 1295 | IPFY_IPOPT_CIPSO { $$ = getoptbyvalue(IPOPT_CIPSO); } 1296 | IPFY_IPOPT_SATID { $$ = getoptbyvalue(IPOPT_SATID); } 1297 | IPFY_IPOPT_SSRR { $$ = getoptbyvalue(IPOPT_SSRR); } 1298 | IPFY_IPOPT_ADDEXT { $$ = getoptbyvalue(IPOPT_ADDEXT); } 1299 | IPFY_IPOPT_VISA { $$ = getoptbyvalue(IPOPT_VISA); } 1300 | IPFY_IPOPT_IMITD { $$ = getoptbyvalue(IPOPT_IMITD); } 1301 | IPFY_IPOPT_EIP { $$ = getoptbyvalue(IPOPT_EIP); } 1302 | IPFY_IPOPT_FINN { $$ = getoptbyvalue(IPOPT_FINN); } 1303 | IPFY_IPOPT_DPS { $$ = getoptbyvalue(IPOPT_DPS); } 1304 | IPFY_IPOPT_SDB { $$ = getoptbyvalue(IPOPT_SDB); } 1305 | IPFY_IPOPT_NSAPA { $$ = getoptbyvalue(IPOPT_NSAPA); } 1306 | IPFY_IPOPT_RTRALRT { $$ = getoptbyvalue(IPOPT_RTRALRT); } 1307 | IPFY_IPOPT_UMP { $$ = getoptbyvalue(IPOPT_UMP); } 1308 | setsecclass secname 1309 { DOALL(fr->fr_mip.fi_secmsk |= $2; 1310 if (!nowith) 1311 fr->fr_ip.fi_secmsk |= $2;) 1312 $$ = 0; 1313 yyresetdict(); 1314 } 1315 ; 1316 1317setsecclass: 1318 IPFY_SECCLASS { yysetdict(ipv4secwords); } 1319 ; 1320 1321ipv6hdr: 1322 IPFY_AH { $$ = getv6optbyvalue(IPPROTO_AH); } 1323 | IPFY_IPV6OPT_DSTOPTS { $$ = getv6optbyvalue(IPPROTO_DSTOPTS); } 1324 | IPFY_IPV6OPT_ESP { $$ = getv6optbyvalue(IPPROTO_ESP); } 1325 | IPFY_IPV6OPT_HOPOPTS { $$ = getv6optbyvalue(IPPROTO_HOPOPTS); } 1326 | IPFY_IPV6OPT_IPV6 { $$ = getv6optbyvalue(IPPROTO_IPV6); } 1327 | IPFY_IPV6OPT_NONE { $$ = getv6optbyvalue(IPPROTO_NONE); } 1328 | IPFY_IPV6OPT_ROUTING { $$ = getv6optbyvalue(IPPROTO_ROUTING); } 1329 | IPFY_IPV6OPT_FRAG { $$ = getv6optbyvalue(IPPROTO_FRAGMENT); } 1330 | IPFY_IPV6OPT_MOBILITY { $$ = getv6optbyvalue(IPPROTO_MOBILITY); } 1331 ; 1332 1333level: IPFY_LEVEL { setsyslog(); } 1334 ; 1335 1336loglevel: 1337 priority { fr->fr_loglevel = LOG_LOCAL0|$1; } 1338 | facility '.' priority { fr->fr_loglevel = $1 | $3; } 1339 ; 1340 1341facility: 1342 IPFY_FAC_KERN { $$ = LOG_KERN; } 1343 | IPFY_FAC_USER { $$ = LOG_USER; } 1344 | IPFY_FAC_MAIL { $$ = LOG_MAIL; } 1345 | IPFY_FAC_DAEMON { $$ = LOG_DAEMON; } 1346 | IPFY_FAC_AUTH { $$ = LOG_AUTH; } 1347 | IPFY_FAC_SYSLOG { $$ = LOG_SYSLOG; } 1348 | IPFY_FAC_LPR { $$ = LOG_LPR; } 1349 | IPFY_FAC_NEWS { $$ = LOG_NEWS; } 1350 | IPFY_FAC_UUCP { $$ = LOG_UUCP; } 1351 | IPFY_FAC_CRON { $$ = LOG_CRON; } 1352 | IPFY_FAC_FTP { $$ = LOG_FTP; } 1353 | IPFY_FAC_AUTHPRIV { $$ = LOG_AUTHPRIV; } 1354 | IPFY_FAC_AUDIT { $$ = LOG_AUDIT; } 1355 | IPFY_FAC_LFMT { $$ = LOG_LFMT; } 1356 | IPFY_FAC_LOCAL0 { $$ = LOG_LOCAL0; } 1357 | IPFY_FAC_LOCAL1 { $$ = LOG_LOCAL1; } 1358 | IPFY_FAC_LOCAL2 { $$ = LOG_LOCAL2; } 1359 | IPFY_FAC_LOCAL3 { $$ = LOG_LOCAL3; } 1360 | IPFY_FAC_LOCAL4 { $$ = LOG_LOCAL4; } 1361 | IPFY_FAC_LOCAL5 { $$ = LOG_LOCAL5; } 1362 | IPFY_FAC_LOCAL6 { $$ = LOG_LOCAL6; } 1363 | IPFY_FAC_LOCAL7 { $$ = LOG_LOCAL7; } 1364 | IPFY_FAC_SECURITY { $$ = LOG_SECURITY; } 1365 ; 1366 1367priority: 1368 IPFY_PRI_EMERG { $$ = LOG_EMERG; } 1369 | IPFY_PRI_ALERT { $$ = LOG_ALERT; } 1370 | IPFY_PRI_CRIT { $$ = LOG_CRIT; } 1371 | IPFY_PRI_ERR { $$ = LOG_ERR; } 1372 | IPFY_PRI_WARN { $$ = LOG_WARNING; } 1373 | IPFY_PRI_NOTICE { $$ = LOG_NOTICE; } 1374 | IPFY_PRI_INFO { $$ = LOG_INFO; } 1375 | IPFY_PRI_DEBUG { $$ = LOG_DEBUG; } 1376 ; 1377 1378compare: 1379 YY_CMP_EQ { $$ = FR_EQUAL; } 1380 | YY_CMP_NE { $$ = FR_NEQUAL; } 1381 | YY_CMP_LT { $$ = FR_LESST; } 1382 | YY_CMP_LE { $$ = FR_LESSTE; } 1383 | YY_CMP_GT { $$ = FR_GREATERT; } 1384 | YY_CMP_GE { $$ = FR_GREATERTE; } 1385 ; 1386 1387range: YY_RANGE_IN { $$ = FR_INRANGE; } 1388 | YY_RANGE_OUT { $$ = FR_OUTRANGE; } 1389 | ':' { $$ = FR_INCRANGE; } 1390 ; 1391 1392servicename: 1393 YY_STR { $$ = $1; } 1394 ; 1395 1396interfacename: name { $$ = $1; } 1397 | name ':' YY_NUMBER 1398 { $$ = $1; 1399 fprintf(stderr, "%d: Logical interface %s:%d unsupported, " 1400 "use the physical interface %s instead.\n", 1401 yylineNum, $1, $3, $1); 1402 } 1403 ; 1404 1405name: YY_STR { $$ = $1; } 1406 | '-' { $$ = strdup("-"); } 1407 ; 1408 1409ipv4_16: 1410 YY_NUMBER '.' YY_NUMBER 1411 { if ($1 > 255 || $3 > 255) { 1412 yyerror("Invalid octet string for IP address"); 1413 return 0; 1414 } 1415 $$.s_addr = ($1 << 24) | ($3 << 16); 1416 $$.s_addr = htonl($$.s_addr); 1417 } 1418 ; 1419 1420ipv4_24: 1421 ipv4_16 '.' YY_NUMBER 1422 { if ($3 > 255) { 1423 yyerror("Invalid octet string for IP address"); 1424 return 0; 1425 } 1426 $$.s_addr |= htonl($3 << 8); 1427 } 1428 ; 1429 1430ipv4: ipv4_24 '.' YY_NUMBER 1431 { if ($3 > 255) { 1432 yyerror("Invalid octet string for IP address"); 1433 return 0; 1434 } 1435 $$.s_addr |= htonl($3); 1436 } 1437 | ipv4_24 1438 | ipv4_16 1439 ; 1440 1441%% 1442 1443 1444static struct wordtab ipfwords[95] = { 1445 { "age", IPFY_AGE }, 1446 { "ah", IPFY_AH }, 1447 { "all", IPFY_ALL }, 1448 { "and", IPFY_AND }, 1449 { "auth", IPFY_AUTH }, 1450 { "bad", IPFY_BAD }, 1451 { "bad-nat", IPFY_BADNAT }, 1452 { "bad-src", IPFY_BADSRC }, 1453 { "bcast", IPFY_BROADCAST }, 1454 { "block", IPFY_BLOCK }, 1455 { "body", IPFY_BODY }, 1456 { "bpf-v4", IPFY_BPFV4 }, 1457#ifdef USE_INET6 1458 { "bpf-v6", IPFY_BPFV6 }, 1459#endif 1460 { "call", IPFY_CALL }, 1461 { "code", IPFY_ICMPCODE }, 1462 { "count", IPFY_COUNT }, 1463 { "dup-to", IPFY_DUPTO }, 1464 { "eq", YY_CMP_EQ }, 1465 { "esp", IPFY_ESP }, 1466 { "fastroute", IPFY_FROUTE }, 1467 { "first", IPFY_FIRST }, 1468 { "flags", IPFY_FLAGS }, 1469 { "frag", IPFY_FRAG }, 1470 { "frag-body", IPFY_FRAGBODY }, 1471 { "frags", IPFY_FRAGS }, 1472 { "from", IPFY_FROM }, 1473 { "ge", YY_CMP_GE }, 1474 { "group", IPFY_GROUP }, 1475 { "gt", YY_CMP_GT }, 1476 { "head", IPFY_HEAD }, 1477 { "icmp", IPFY_ICMP }, 1478 { "icmp-type", IPFY_ICMPTYPE }, 1479 { "in", IPFY_IN }, 1480 { "in-via", IPFY_INVIA }, 1481 { "ipopt", IPFY_IPOPTS }, 1482 { "ipopts", IPFY_IPOPTS }, 1483 { "keep", IPFY_KEEP }, 1484 { "le", YY_CMP_LE }, 1485 { "level", IPFY_LEVEL }, 1486 { "limit", IPFY_LIMIT }, 1487 { "log", IPFY_LOG }, 1488 { "lowttl", IPFY_LOWTTL }, 1489 { "lt", YY_CMP_LT }, 1490 { "mask", IPFY_MASK }, 1491 { "match-tag", IPFY_MATCHTAG }, 1492 { "mbcast", IPFY_MBCAST }, 1493 { "mcast", IPFY_MULTICAST }, 1494 { "multicast", IPFY_MULTICAST }, 1495 { "nat", IPFY_NAT }, 1496 { "ne", YY_CMP_NE }, 1497 { "net", IPFY_NETWORK }, 1498 { "newisn", IPFY_NEWISN }, 1499 { "no", IPFY_NO }, 1500 { "no-icmp-err", IPFY_NOICMPERR }, 1501 { "nomatch", IPFY_NOMATCH }, 1502 { "now", IPFY_NOW }, 1503 { "not", IPFY_NOT }, 1504 { "oow", IPFY_OOW }, 1505 { "on", IPFY_ON }, 1506 { "opt", IPFY_OPT }, 1507 { "or-block", IPFY_ORBLOCK }, 1508 { "out", IPFY_OUT }, 1509 { "out-via", IPFY_OUTVIA }, 1510 { "pass", IPFY_PASS }, 1511 { "port", IPFY_PORT }, 1512 { "pps", IPFY_PPS }, 1513 { "preauth", IPFY_PREAUTH }, 1514 { "proto", IPFY_PROTO }, 1515 { "quick", IPFY_QUICK }, 1516 { "reply-to", IPFY_REPLY_TO }, 1517 { "return-icmp", IPFY_RETICMP }, 1518 { "return-icmp-as-dest", IPFY_RETICMPASDST }, 1519 { "return-rst", IPFY_RETRST }, 1520 { "route-to", IPFY_ROUTETO }, 1521 { "sec-class", IPFY_SECCLASS }, 1522 { "set-tag", IPFY_SETTAG }, 1523 { "skip", IPFY_SKIP }, 1524 { "short", IPFY_SHORT }, 1525 { "state", IPFY_STATE }, 1526 { "state-age", IPFY_AGE }, 1527 { "strict", IPFY_STRICT }, 1528 { "sync", IPFY_SYNC }, 1529 { "tcp", IPFY_TCP }, 1530 { "tcp-udp", IPFY_TCPUDP }, 1531 { "tos", IPFY_TOS }, 1532 { "to", IPFY_TO }, 1533 { "ttl", IPFY_TTL }, 1534 { "udp", IPFY_UDP }, 1535 { "v6hdrs", IPF6_V6HDRS }, 1536 { "with", IPFY_WITH }, 1537 { NULL, 0 } 1538}; 1539 1540static struct wordtab addrwords[4] = { 1541 { "any", IPFY_ANY }, 1542 { "hash", IPFY_HASH }, 1543 { "pool", IPFY_POOL }, 1544 { NULL, 0 } 1545}; 1546 1547static struct wordtab maskwords[5] = { 1548 { "broadcast", IPFY_BROADCAST }, 1549 { "netmasked", IPFY_NETMASKED }, 1550 { "network", IPFY_NETWORK }, 1551 { "peer", IPFY_PEER }, 1552 { NULL, 0 } 1553}; 1554 1555static struct wordtab icmptypewords[16] = { 1556 { "echo", IPFY_ICMPT_ECHO }, 1557 { "echorep", IPFY_ICMPT_ECHOR }, 1558 { "inforeq", IPFY_ICMPT_INFOREQ }, 1559 { "inforep", IPFY_ICMPT_INFOREP }, 1560 { "maskrep", IPFY_ICMPT_MASKREP }, 1561 { "maskreq", IPFY_ICMPT_MASKREQ }, 1562 { "paramprob", IPFY_ICMPT_PARAMP }, 1563 { "redir", IPFY_ICMPT_REDIR }, 1564 { "unreach", IPFY_ICMPT_UNR }, 1565 { "routerad", IPFY_ICMPT_ROUTERAD }, 1566 { "routersol", IPFY_ICMPT_ROUTERSOL }, 1567 { "squench", IPFY_ICMPT_SQUENCH }, 1568 { "timest", IPFY_ICMPT_TIMEST }, 1569 { "timestrep", IPFY_ICMPT_TIMESTREP }, 1570 { "timex", IPFY_ICMPT_TIMEX }, 1571 { NULL, 0 }, 1572}; 1573 1574static struct wordtab icmpcodewords[17] = { 1575 { "cutoff-preced", IPFY_ICMPC_CUTPRE }, 1576 { "filter-prohib", IPFY_ICMPC_FLTPRO }, 1577 { "isolate", IPFY_ICMPC_ISOLATE }, 1578 { "needfrag", IPFY_ICMPC_NEEDF }, 1579 { "net-prohib", IPFY_ICMPC_NETPRO }, 1580 { "net-tos", IPFY_ICMPC_NETTOS }, 1581 { "host-preced", IPFY_ICMPC_HSTPRE }, 1582 { "host-prohib", IPFY_ICMPC_HSTPRO }, 1583 { "host-tos", IPFY_ICMPC_HSTTOS }, 1584 { "host-unk", IPFY_ICMPC_HSTUNK }, 1585 { "host-unr", IPFY_ICMPC_HSTUNR }, 1586 { "net-unk", IPFY_ICMPC_NETUNK }, 1587 { "net-unr", IPFY_ICMPC_NETUNR }, 1588 { "port-unr", IPFY_ICMPC_PORUNR }, 1589 { "proto-unr", IPFY_ICMPC_PROUNR }, 1590 { "srcfail", IPFY_ICMPC_SRCFAIL }, 1591 { NULL, 0 }, 1592}; 1593 1594static struct wordtab ipv4optwords[25] = { 1595 { "addext", IPFY_IPOPT_ADDEXT }, 1596 { "cipso", IPFY_IPOPT_CIPSO }, 1597 { "dps", IPFY_IPOPT_DPS }, 1598 { "e-sec", IPFY_IPOPT_ESEC }, 1599 { "eip", IPFY_IPOPT_EIP }, 1600 { "encode", IPFY_IPOPT_ENCODE }, 1601 { "finn", IPFY_IPOPT_FINN }, 1602 { "imitd", IPFY_IPOPT_IMITD }, 1603 { "lsrr", IPFY_IPOPT_LSRR }, 1604 { "mtup", IPFY_IPOPT_MTUP }, 1605 { "mtur", IPFY_IPOPT_MTUR }, 1606 { "nop", IPFY_IPOPT_NOP }, 1607 { "nsapa", IPFY_IPOPT_NSAPA }, 1608 { "rr", IPFY_IPOPT_RR }, 1609 { "rtralrt", IPFY_IPOPT_RTRALRT }, 1610 { "satid", IPFY_IPOPT_SATID }, 1611 { "sdb", IPFY_IPOPT_SDB }, 1612 { "sec", IPFY_IPOPT_SEC }, 1613 { "ssrr", IPFY_IPOPT_SSRR }, 1614 { "tr", IPFY_IPOPT_TR }, 1615 { "ts", IPFY_IPOPT_TS }, 1616 { "ump", IPFY_IPOPT_UMP }, 1617 { "visa", IPFY_IPOPT_VISA }, 1618 { "zsu", IPFY_IPOPT_ZSU }, 1619 { NULL, 0 }, 1620}; 1621 1622static struct wordtab ipv4secwords[9] = { 1623 { "confid", IPFY_SEC_CONF }, 1624 { "reserv-1", IPFY_SEC_RSV1 }, 1625 { "reserv-2", IPFY_SEC_RSV2 }, 1626 { "reserv-3", IPFY_SEC_RSV3 }, 1627 { "reserv-4", IPFY_SEC_RSV4 }, 1628 { "secret", IPFY_SEC_SEC }, 1629 { "topsecret", IPFY_SEC_TS }, 1630 { "unclass", IPFY_SEC_UNC }, 1631 { NULL, 0 }, 1632}; 1633 1634static struct wordtab ipv6optwords[9] = { 1635 { "dstopts", IPFY_IPV6OPT_DSTOPTS }, 1636 { "esp", IPFY_IPV6OPT_ESP }, 1637 { "frag", IPFY_IPV6OPT_FRAG }, 1638 { "hopopts", IPFY_IPV6OPT_HOPOPTS }, 1639 { "ipv6", IPFY_IPV6OPT_IPV6 }, 1640 { "mobility", IPFY_IPV6OPT_MOBILITY }, 1641 { "none", IPFY_IPV6OPT_NONE }, 1642 { "routing", IPFY_IPV6OPT_ROUTING }, 1643 { NULL, 0 }, 1644}; 1645 1646static struct wordtab logwords[33] = { 1647 { "kern", IPFY_FAC_KERN }, 1648 { "user", IPFY_FAC_USER }, 1649 { "mail", IPFY_FAC_MAIL }, 1650 { "daemon", IPFY_FAC_DAEMON }, 1651 { "auth", IPFY_FAC_AUTH }, 1652 { "syslog", IPFY_FAC_SYSLOG }, 1653 { "lpr", IPFY_FAC_LPR }, 1654 { "news", IPFY_FAC_NEWS }, 1655 { "uucp", IPFY_FAC_UUCP }, 1656 { "cron", IPFY_FAC_CRON }, 1657 { "ftp", IPFY_FAC_FTP }, 1658 { "authpriv", IPFY_FAC_AUTHPRIV }, 1659 { "audit", IPFY_FAC_AUDIT }, 1660 { "logalert", IPFY_FAC_LFMT }, 1661 { "console", IPFY_FAC_CONSOLE }, 1662 { "security", IPFY_FAC_SECURITY }, 1663 { "local0", IPFY_FAC_LOCAL0 }, 1664 { "local1", IPFY_FAC_LOCAL1 }, 1665 { "local2", IPFY_FAC_LOCAL2 }, 1666 { "local3", IPFY_FAC_LOCAL3 }, 1667 { "local4", IPFY_FAC_LOCAL4 }, 1668 { "local5", IPFY_FAC_LOCAL5 }, 1669 { "local6", IPFY_FAC_LOCAL6 }, 1670 { "local7", IPFY_FAC_LOCAL7 }, 1671 { "emerg", IPFY_PRI_EMERG }, 1672 { "alert", IPFY_PRI_ALERT }, 1673 { "crit", IPFY_PRI_CRIT }, 1674 { "err", IPFY_PRI_ERR }, 1675 { "warn", IPFY_PRI_WARN }, 1676 { "notice", IPFY_PRI_NOTICE }, 1677 { "info", IPFY_PRI_INFO }, 1678 { "debug", IPFY_PRI_DEBUG }, 1679 { NULL, 0 }, 1680}; 1681 1682 1683 1684 1685int ipf_parsefile(fd, addfunc, iocfuncs, filename) 1686int fd; 1687addfunc_t addfunc; 1688ioctlfunc_t *iocfuncs; 1689char *filename; 1690{ 1691 FILE *fp = NULL; 1692 char *s; 1693 1694 yylineNum = 1; 1695 yysettab(ipfwords); 1696 1697 s = getenv("YYDEBUG"); 1698 if (s != NULL) 1699 yydebug = atoi(s); 1700 else 1701 yydebug = 0; 1702 1703 if (strcmp(filename, "-")) { 1704 fp = fopen(filename, "r"); 1705 if (fp == NULL) { 1706 fprintf(stderr, "fopen(%s) failed: %s\n", filename, 1707 STRERROR(errno)); 1708 return -1; 1709 } 1710 } else 1711 fp = stdin; 1712 1713 while (ipf_parsesome(fd, addfunc, iocfuncs, fp) == 1) 1714 ; 1715 if (fp != NULL) 1716 fclose(fp); 1717 return 0; 1718} 1719 1720 1721int ipf_parsesome(fd, addfunc, iocfuncs, fp) 1722int fd; 1723addfunc_t addfunc; 1724ioctlfunc_t *iocfuncs; 1725FILE *fp; 1726{ 1727 char *s; 1728 int i; 1729 1730 ipffd = fd; 1731 for (i = 0; i <= IPL_LOGMAX; i++) 1732 ipfioctl[i] = iocfuncs[i]; 1733 ipfaddfunc = addfunc; 1734 1735 if (feof(fp)) 1736 return 0; 1737 i = fgetc(fp); 1738 if (i == EOF) 1739 return 0; 1740 if (ungetc(i, fp) == 0) 1741 return 0; 1742 if (feof(fp)) 1743 return 0; 1744 s = getenv("YYDEBUG"); 1745 if (s != NULL) 1746 yydebug = atoi(s); 1747 else 1748 yydebug = 0; 1749 1750 yyin = fp; 1751 yyparse(); 1752 return 1; 1753} 1754 1755 1756static void newrule() 1757{ 1758 frentry_t *frn; 1759 1760 frn = (frentry_t *)calloc(1, sizeof(frentry_t)); 1761 for (fr = frtop; fr != NULL && fr->fr_next != NULL; fr = fr->fr_next) 1762 ; 1763 if (fr != NULL) 1764 fr->fr_next = frn; 1765 if (frtop == NULL) 1766 frtop = frn; 1767 fr = frn; 1768 frc = frn; 1769 fr->fr_loglevel = 0xffff; 1770 fr->fr_isc = (void *)-1; 1771 fr->fr_logtag = FR_NOLOGTAG; 1772 fr->fr_type = FR_T_NONE; 1773 if (use_inet6 != 0) 1774 fr->fr_v = 6; 1775 else 1776 fr->fr_v = 4; 1777 1778 nrules = 1; 1779} 1780 1781 1782static void setipftype() 1783{ 1784 for (fr = frc; fr != NULL; fr = fr->fr_next) { 1785 if (fr->fr_type == FR_T_NONE) { 1786 fr->fr_type = FR_T_IPF; 1787 fr->fr_data = (void *)calloc(sizeof(fripf_t), 1); 1788 fr->fr_dsize = sizeof(fripf_t); 1789 fr->fr_ip.fi_v = frc->fr_v; 1790 fr->fr_mip.fi_v = 0xf; 1791 fr->fr_ipf->fri_sifpidx = -1; 1792 fr->fr_ipf->fri_difpidx = -1; 1793 } 1794 if (fr->fr_type != FR_T_IPF) { 1795 fprintf(stderr, "IPF Type not set\n"); 1796 } 1797 } 1798} 1799 1800 1801static frentry_t *addrule() 1802{ 1803 frentry_t *f, *f1, *f2; 1804 int count; 1805 1806 for (f2 = frc; f2->fr_next != NULL; f2 = f2->fr_next) 1807 ; 1808 1809 count = nrules; 1810 f = f2; 1811 for (f1 = frc; count > 0; count--, f1 = f1->fr_next) { 1812 f->fr_next = (frentry_t *)calloc(sizeof(*f), 1); 1813 added++; 1814 f = f->fr_next; 1815 bcopy(f1, f, sizeof(*f)); 1816 f->fr_next = NULL; 1817 if (f->fr_caddr != NULL) { 1818 f->fr_caddr = malloc(f->fr_dsize); 1819 bcopy(f1->fr_caddr, f->fr_caddr, f->fr_dsize); 1820 } 1821 } 1822 1823 return f2->fr_next; 1824} 1825 1826 1827static u_32_t lookuphost(name) 1828char *name; 1829{ 1830 u_32_t addr; 1831 int i; 1832 1833 hashed = 0; 1834 pooled = 0; 1835 dynamic = -1; 1836 1837 for (i = 0; i < 4; i++) { 1838 if (strncmp(name, frc->fr_ifnames[i], 1839 sizeof(frc->fr_ifnames[i])) == 0) { 1840 ifpflag = FRI_DYNAMIC; 1841 dynamic = i; 1842 return 0; 1843 } 1844 } 1845 1846 if (gethost(name, &addr) == -1) { 1847 fprintf(stderr, "unknown name \"%s\"\n", name); 1848 return 0; 1849 } 1850 return addr; 1851} 1852 1853 1854static void dobpf(v, phrase) 1855int v; 1856char *phrase; 1857{ 1858#ifdef IPFILTER_BPF 1859 struct bpf_program bpf; 1860 struct pcap *p; 1861#endif 1862 fakebpf_t *fb; 1863 u_32_t l; 1864 char *s; 1865 int i; 1866 1867 for (fr = frc; fr != NULL; fr = fr->fr_next) { 1868 if (fr->fr_type != FR_T_NONE) { 1869 fprintf(stderr, "cannot mix IPF and BPF matching\n"); 1870 return; 1871 } 1872 fr->fr_v = v; 1873 fr->fr_type = FR_T_BPFOPC; 1874 1875 if (!strncmp(phrase, "0x", 2)) { 1876 fb = malloc(sizeof(fakebpf_t)); 1877 1878 for (i = 0, s = strtok(phrase, " \r\n\t"); s != NULL; 1879 s = strtok(NULL, " \r\n\t"), i++) { 1880 fb = realloc(fb, (i / 4 + 1) * sizeof(*fb)); 1881 l = (u_32_t)strtol(s, NULL, 0); 1882 switch (i & 3) 1883 { 1884 case 0 : 1885 fb[i / 4].fb_c = l & 0xffff; 1886 break; 1887 case 1 : 1888 fb[i / 4].fb_t = l & 0xff; 1889 break; 1890 case 2 : 1891 fb[i / 4].fb_f = l & 0xff; 1892 break; 1893 case 3 : 1894 fb[i / 4].fb_k = l; 1895 break; 1896 } 1897 } 1898 if ((i & 3) != 0) { 1899 fprintf(stderr, 1900 "Odd number of bytes in BPF code\n"); 1901 exit(1); 1902 } 1903 i--; 1904 fr->fr_dsize = (i / 4 + 1) * sizeof(*fb); 1905 fr->fr_data = fb; 1906 return; 1907 } 1908 1909#ifdef IPFILTER_BPF 1910 bzero((char *)&bpf, sizeof(bpf)); 1911 p = pcap_open_dead(DLT_RAW, 1); 1912 if (!p) { 1913 fprintf(stderr, "pcap_open_dead failed\n"); 1914 return; 1915 } 1916 1917 if (pcap_compile(p, &bpf, phrase, 1, 0xffffffff)) { 1918 pcap_perror(p, "ipf"); 1919 pcap_close(p); 1920 fprintf(stderr, "pcap parsing failed (%s)\n", phrase); 1921 return; 1922 } 1923 pcap_close(p); 1924 1925 fr->fr_dsize = bpf.bf_len * sizeof(struct bpf_insn); 1926 fr->fr_data = malloc(fr->fr_dsize); 1927 bcopy((char *)bpf.bf_insns, fr->fr_data, fr->fr_dsize); 1928 if (!bpf_validate(fr->fr_data, bpf.bf_len)) { 1929 fprintf(stderr, "BPF validation failed\n"); 1930 return; 1931 } 1932#endif 1933 } 1934 1935#ifdef IPFILTER_BPF 1936 if (opts & OPT_DEBUG) 1937 bpf_dump(&bpf, 0); 1938#else 1939 fprintf(stderr, "BPF filter expressions not supported\n"); 1940 exit(1); 1941#endif 1942} 1943 1944 1945static void resetaddr() 1946{ 1947 hashed = 0; 1948 pooled = 0; 1949 dynamic = -1; 1950} 1951 1952 1953static alist_t *newalist(ptr) 1954alist_t *ptr; 1955{ 1956 alist_t *al; 1957 1958 al = malloc(sizeof(*al)); 1959 if (al == NULL) 1960 return NULL; 1961 al->al_not = 0; 1962 al->al_next = ptr; 1963 return al; 1964} 1965 1966 1967static int makepool(list) 1968alist_t *list; 1969{ 1970 ip_pool_node_t *n, *top; 1971 ip_pool_t pool; 1972 alist_t *a; 1973 int num; 1974 1975 if (list == NULL) 1976 return 0; 1977 top = calloc(1, sizeof(*top)); 1978 if (top == NULL) 1979 return 0; 1980 1981 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 1982 n->ipn_addr.adf_addr.in4.s_addr = a->al_1; 1983 n->ipn_mask.adf_addr.in4.s_addr = a->al_2; 1984 n->ipn_info = a->al_not; 1985 if (a->al_next != NULL) { 1986 n->ipn_next = calloc(1, sizeof(*n)); 1987 n = n->ipn_next; 1988 } 1989 } 1990 1991 bzero((char *)&pool, sizeof(pool)); 1992 pool.ipo_unit = IPL_LOGIPF; 1993 pool.ipo_list = top; 1994 num = load_pool(&pool, ipfioctl[IPL_LOGLOOKUP]); 1995 1996 while ((n = top) != NULL) { 1997 top = n->ipn_next; 1998 free(n); 1999 } 2000 return num; 2001} 2002 2003 2004static u_int makehash(list) 2005alist_t *list; 2006{ 2007 iphtent_t *n, *top; 2008 iphtable_t iph; 2009 alist_t *a; 2010 int num; 2011 2012 if (list == NULL) 2013 return 0; 2014 top = calloc(1, sizeof(*top)); 2015 if (top == NULL) 2016 return 0; 2017 2018 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2019 n->ipe_addr.in4_addr = a->al_1; 2020 n->ipe_mask.in4_addr = a->al_2; 2021 n->ipe_value = 0; 2022 if (a->al_next != NULL) { 2023 n->ipe_next = calloc(1, sizeof(*n)); 2024 n = n->ipe_next; 2025 } 2026 } 2027 2028 bzero((char *)&iph, sizeof(iph)); 2029 iph.iph_unit = IPL_LOGIPF; 2030 iph.iph_type = IPHASH_LOOKUP; 2031 *iph.iph_name = '\0'; 2032 2033 if (load_hash(&iph, top, ipfioctl[IPL_LOGLOOKUP]) == 0) 2034 sscanf(iph.iph_name, "%u", &num); 2035 else 2036 num = 0; 2037 2038 while ((n = top) != NULL) { 2039 top = n->ipe_next; 2040 free(n); 2041 } 2042 return num; 2043} 2044 2045 2046void ipf_addrule(fd, ioctlfunc, ptr) 2047int fd; 2048ioctlfunc_t ioctlfunc; 2049void *ptr; 2050{ 2051 ioctlcmd_t add, del; 2052 frentry_t *fr; 2053 ipfobj_t obj; 2054 2055 if (ptr == NULL) 2056 return; 2057 2058 fr = ptr; 2059 add = 0; 2060 del = 0; 2061 2062 bzero((char *)&obj, sizeof(obj)); 2063 obj.ipfo_rev = IPFILTER_VERSION; 2064 obj.ipfo_size = sizeof(*fr); 2065 obj.ipfo_type = IPFOBJ_FRENTRY; 2066 obj.ipfo_ptr = ptr; 2067 2068 if ((opts & OPT_DONOTHING) != 0) 2069 fd = -1; 2070 2071 if (opts & OPT_ZERORULEST) { 2072 add = SIOCZRLST; 2073 } else if (opts & OPT_INACTIVE) { 2074 add = (u_int)fr->fr_hits ? SIOCINIFR : 2075 SIOCADIFR; 2076 del = SIOCRMIFR; 2077 } else { 2078 add = (u_int)fr->fr_hits ? SIOCINAFR : 2079 SIOCADAFR; 2080 del = SIOCRMAFR; 2081 } 2082 2083 if ((opts & OPT_OUTQUE) != 0) 2084 fr->fr_flags |= FR_OUTQUE; 2085 if (fr->fr_hits) 2086 fr->fr_hits--; 2087 if ((opts & OPT_VERBOSE) != 0) 2088 printfr(fr, ioctlfunc); 2089 2090 if ((opts & OPT_DEBUG) != 0) { 2091 binprint(fr, sizeof(*fr)); 2092 if (fr->fr_data != NULL) 2093 binprint(fr->fr_data, fr->fr_dsize); 2094 } 2095 2096 if ((opts & OPT_ZERORULEST) != 0) { 2097 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2098 if ((opts & OPT_DONOTHING) == 0) { 2099 fprintf(stderr, "%d:", yylineNum); 2100 perror("ioctl(SIOCZRLST)"); 2101 } 2102 } else { 2103#ifdef USE_QUAD_T 2104 printf("hits %qd bytes %qd ", 2105 (long long)fr->fr_hits, 2106 (long long)fr->fr_bytes); 2107#else 2108 printf("hits %ld bytes %ld ", 2109 fr->fr_hits, fr->fr_bytes); 2110#endif 2111 printfr(fr, ioctlfunc); 2112 } 2113 } else if ((opts & OPT_REMOVE) != 0) { 2114 if ((*ioctlfunc)(fd, del, (void *)&obj) == -1) { 2115 if ((opts & OPT_DONOTHING) != 0) { 2116 fprintf(stderr, "%d:", yylineNum); 2117 perror("ioctl(delete rule)"); 2118 } 2119 } 2120 } else { 2121 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2122 if (!(opts & OPT_DONOTHING)) { 2123 fprintf(stderr, "%d:", yylineNum); 2124 perror("ioctl(add/insert rule)"); 2125 } 2126 } 2127 } 2128} 2129 2130static void setsyslog() 2131{ 2132 yysetdict(logwords); 2133 yybreakondot = 1; 2134} 2135 2136 2137static void unsetsyslog() 2138{ 2139 yyresetdict(); 2140 yybreakondot = 0; 2141} 2142 2143 2144static void fillgroup(fr) 2145frentry_t *fr; 2146{ 2147 frentry_t *f; 2148 2149 for (f = frold; f != NULL; f = f->fr_next) 2150 if (strncmp(f->fr_grhead, fr->fr_group, FR_GROUPLEN) == 0) 2151 break; 2152 if (f == NULL) 2153 return; 2154 2155 /* 2156 * Only copy down matching fields if the rules are of the same type 2157 * and are of ipf type. The only fields that are copied are those 2158 * that impact the rule parsing itself, eg. need for knowing what the 2159 * protocol should be for rules with port comparisons in them. 2160 */ 2161 if (f->fr_type != fr->fr_type || f->fr_type != FR_T_IPF) 2162 return; 2163 2164 if (fr->fr_v == 0 && f->fr_v != 0) 2165 fr->fr_v = f->fr_v; 2166 2167 if (fr->fr_mproto == 0 && f->fr_mproto != 0) 2168 fr->fr_mproto = f->fr_mproto; 2169 if (fr->fr_proto == 0 && f->fr_proto != 0) 2170 fr->fr_proto = f->fr_proto; 2171 2172 if ((fr->fr_mproto == 0) && ((fr->fr_flx & FI_TCPUDP) == 0) && 2173 ((f->fr_flx & FI_TCPUDP) != 0)) 2174 fr->fr_flx |= FI_TCPUDP; 2175} 2176