ipf_y.y revision 255332
1/* $FreeBSD: head/contrib/ipfilter/tools/ipf_y.y 255332 2013-09-06 23:11:19Z cy $ */ 2 3/* 4 * Copyright (C) 2012 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 */ 8%{ 9#include "ipf.h" 10#include <sys/ioctl.h> 11#include <syslog.h> 12#ifdef IPFILTER_BPF 13# include <pcap.h> 14#endif 15#include "netinet/ip_pool.h" 16#include "netinet/ip_htable.h" 17#include "netinet/ipl.h" 18#include "ipf_l.h" 19 20#define YYDEBUG 1 21#define DOALL(x) for (fr = frc; fr != NULL; fr = fr->fr_next) { x } 22#define DOREM(x) for (; fr != NULL; fr = fr->fr_next) { x } 23 24extern void yyerror __P((char *)); 25extern int yyparse __P((void)); 26extern int yylex __P((void)); 27extern int yydebug; 28extern FILE *yyin; 29extern int yylineNum; 30 31static int addname __P((frentry_t **, char *)); 32static frentry_t *addrule __P((void)); 33static frentry_t *allocfr __P((void)); 34static void build_dstaddr_af __P((frentry_t *, void *)); 35static void build_srcaddr_af __P((frentry_t *, void *)); 36static void dobpf __P((int, char *)); 37static void doipfexpr __P((char *)); 38static void do_tuneint __P((char *, int)); 39static void do_tunestr __P((char *, char *)); 40static void fillgroup __P((frentry_t *)); 41static int lookuphost __P((char *, i6addr_t *)); 42static u_int makehash __P((struct alist_s *)); 43static int makepool __P((struct alist_s *)); 44static struct alist_s *newalist __P((struct alist_s *)); 45static void newrule __P((void)); 46static void resetaddr __P((void)); 47static void setgroup __P((frentry_t **, char *)); 48static void setgrhead __P((frentry_t **, char *)); 49static void seticmphead __P((frentry_t **, char *)); 50static void setifname __P((frentry_t **, int, char *)); 51static void setipftype __P((void)); 52static void setsyslog __P((void)); 53static void unsetsyslog __P((void)); 54 55frentry_t *fr = NULL, *frc = NULL, *frtop = NULL, *frold = NULL; 56 57static int ifpflag = 0; 58static int nowith = 0; 59static int dynamic = -1; 60static int pooled = 0; 61static int hashed = 0; 62static int nrules = 0; 63static int newlist = 0; 64static int added = 0; 65static int ipffd = -1; 66static int *yycont = NULL; 67static ioctlfunc_t ipfioctls[IPL_LOGSIZE]; 68static addfunc_t ipfaddfunc = NULL; 69 70%} 71%union { 72 char *str; 73 u_32_t num; 74 frentry_t fr; 75 frtuc_t *frt; 76 struct alist_s *alist; 77 u_short port; 78 struct in_addr ip4; 79 struct { 80 u_short p1; 81 u_short p2; 82 int pc; 83 } pc; 84 struct ipp_s { 85 int type; 86 int ifpos; 87 int f; 88 int v; 89 int lif; 90 union i6addr a; 91 union i6addr m; 92 char *name; 93 } ipp; 94 struct { 95 i6addr_t adr; 96 int f; 97 } adr; 98 i6addr_t ip6; 99 struct { 100 char *if1; 101 char *if2; 102 } ifs; 103 char gname[FR_GROUPLEN]; 104}; 105 106%type <port> portnum 107%type <num> facility priority icmpcode seclevel secname icmptype 108%type <num> opt compare range opttype flagset optlist ipv6hdrlist ipv6hdr 109%type <num> portc porteq ipmask maskopts 110%type <ip4> ipv4 ipv4_16 ipv4_24 111%type <adr> hostname 112%type <ipp> addr ipaddr 113%type <str> servicename name interfacename groupname 114%type <pc> portrange portcomp 115%type <alist> addrlist poollist 116%type <ifs> onname 117 118%token <num> YY_NUMBER YY_HEX 119%token <str> YY_STR 120%token YY_COMMENT 121%token YY_CMP_EQ YY_CMP_NE YY_CMP_LE YY_CMP_GE YY_CMP_LT YY_CMP_GT 122%token YY_RANGE_OUT YY_RANGE_IN 123%token <ip6> YY_IPV6 124 125%token IPFY_SET 126%token IPFY_PASS IPFY_BLOCK IPFY_COUNT IPFY_CALL IPFY_NOMATCH 127%token IPFY_RETICMP IPFY_RETRST IPFY_RETICMPASDST 128%token IPFY_IN IPFY_OUT 129%token IPFY_QUICK IPFY_ON IPFY_OUTVIA IPFY_INVIA 130%token IPFY_DUPTO IPFY_TO IPFY_FROUTE IPFY_REPLY_TO IPFY_ROUTETO 131%token IPFY_TOS IPFY_TTL IPFY_PROTO IPFY_INET IPFY_INET6 132%token IPFY_HEAD IPFY_GROUP 133%token IPFY_AUTH IPFY_PREAUTH 134%token IPFY_LOG IPFY_BODY IPFY_FIRST IPFY_LEVEL IPFY_ORBLOCK IPFY_L5AS 135%token IPFY_LOGTAG IPFY_MATCHTAG IPFY_SETTAG IPFY_SKIP IPFY_DECAPS 136%token IPFY_FROM IPFY_ALL IPFY_ANY IPFY_BPFV4 IPFY_BPFV6 IPFY_POOL IPFY_HASH 137%token IPFY_IPFEXPR IPFY_PPS IPFY_FAMILY IPFY_DSTLIST 138%token IPFY_ESP IPFY_AH 139%token IPFY_WITH IPFY_AND IPFY_NOT IPFY_NO IPFY_OPT 140%token IPFY_TCPUDP IPFY_TCP IPFY_UDP 141%token IPFY_FLAGS IPFY_MULTICAST 142%token IPFY_MASK IPFY_BROADCAST IPFY_NETWORK IPFY_NETMASKED IPFY_PEER 143%token IPFY_RPC IPFY_PORT 144%token IPFY_NOW IPFY_COMMENT IPFY_RULETTL 145%token IPFY_ICMP IPFY_ICMPTYPE IPFY_ICMPCODE 146%token IPFY_IPOPTS IPFY_SHORT IPFY_NAT IPFY_BADSRC IPFY_LOWTTL IPFY_FRAG 147%token IPFY_MBCAST IPFY_BAD IPFY_BADNAT IPFY_OOW IPFY_NEWISN IPFY_NOICMPERR 148%token IPFY_KEEP IPFY_STATE IPFY_FRAGS IPFY_LIMIT IPFY_STRICT IPFY_AGE 149%token IPFY_SYNC IPFY_FRAGBODY IPFY_ICMPHEAD IPFY_NOLOG IPFY_LOOSE 150%token IPFY_MAX_SRCS IPFY_MAX_PER_SRC 151%token IPFY_IPOPT_NOP IPFY_IPOPT_RR IPFY_IPOPT_ZSU IPFY_IPOPT_MTUP 152%token IPFY_IPOPT_MTUR IPFY_IPOPT_ENCODE IPFY_IPOPT_TS IPFY_IPOPT_TR 153%token IPFY_IPOPT_SEC IPFY_IPOPT_LSRR IPFY_IPOPT_ESEC IPFY_IPOPT_CIPSO 154%token IPFY_IPOPT_SATID IPFY_IPOPT_SSRR IPFY_IPOPT_ADDEXT IPFY_IPOPT_VISA 155%token IPFY_IPOPT_IMITD IPFY_IPOPT_EIP IPFY_IPOPT_FINN IPFY_IPOPT_DPS 156%token IPFY_IPOPT_SDB IPFY_IPOPT_NSAPA IPFY_IPOPT_RTRALRT IPFY_IPOPT_UMP 157%token IPFY_SECCLASS IPFY_SEC_UNC IPFY_SEC_CONF IPFY_SEC_RSV1 IPFY_SEC_RSV2 158%token IPFY_SEC_RSV4 IPFY_SEC_SEC IPFY_SEC_TS IPFY_SEC_RSV3 IPFY_DOI 159 160%token IPFY_V6HDRS IPFY_IPV6OPT IPFY_IPV6OPT_DSTOPTS IPFY_IPV6OPT_HOPOPTS 161%token IPFY_IPV6OPT_IPV6 IPFY_IPV6OPT_NONE IPFY_IPV6OPT_ROUTING IPFY_V6HDR 162%token IPFY_IPV6OPT_MOBILITY IPFY_IPV6OPT_ESP IPFY_IPV6OPT_FRAG 163 164%token IPFY_ICMPT_UNR IPFY_ICMPT_ECHO IPFY_ICMPT_ECHOR IPFY_ICMPT_SQUENCH 165%token IPFY_ICMPT_REDIR IPFY_ICMPT_TIMEX IPFY_ICMPT_PARAMP IPFY_ICMPT_TIMEST 166%token IPFY_ICMPT_TIMESTREP IPFY_ICMPT_INFOREQ IPFY_ICMPT_INFOREP 167%token IPFY_ICMPT_MASKREQ IPFY_ICMPT_MASKREP IPFY_ICMPT_ROUTERAD 168%token IPFY_ICMPT_ROUTERSOL 169 170%token IPFY_ICMPC_NETUNR IPFY_ICMPC_HSTUNR IPFY_ICMPC_PROUNR IPFY_ICMPC_PORUNR 171%token IPFY_ICMPC_NEEDF IPFY_ICMPC_SRCFAIL IPFY_ICMPC_NETUNK IPFY_ICMPC_HSTUNK 172%token IPFY_ICMPC_ISOLATE IPFY_ICMPC_NETPRO IPFY_ICMPC_HSTPRO 173%token IPFY_ICMPC_NETTOS IPFY_ICMPC_HSTTOS IPFY_ICMPC_FLTPRO IPFY_ICMPC_HSTPRE 174%token IPFY_ICMPC_CUTPRE 175 176%token IPFY_FAC_KERN IPFY_FAC_USER IPFY_FAC_MAIL IPFY_FAC_DAEMON IPFY_FAC_AUTH 177%token IPFY_FAC_SYSLOG IPFY_FAC_LPR IPFY_FAC_NEWS IPFY_FAC_UUCP IPFY_FAC_CRON 178%token IPFY_FAC_LOCAL0 IPFY_FAC_LOCAL1 IPFY_FAC_LOCAL2 IPFY_FAC_LOCAL3 179%token IPFY_FAC_LOCAL4 IPFY_FAC_LOCAL5 IPFY_FAC_LOCAL6 IPFY_FAC_LOCAL7 180%token IPFY_FAC_SECURITY IPFY_FAC_FTP IPFY_FAC_AUTHPRIV IPFY_FAC_AUDIT 181%token IPFY_FAC_LFMT IPFY_FAC_CONSOLE 182 183%token IPFY_PRI_EMERG IPFY_PRI_ALERT IPFY_PRI_CRIT IPFY_PRI_ERR IPFY_PRI_WARN 184%token IPFY_PRI_NOTICE IPFY_PRI_INFO IPFY_PRI_DEBUG 185%% 186file: settings rules 187 | rules 188 ; 189 190settings: 191 YY_COMMENT 192 | setting 193 | settings setting 194 ; 195 196rules: line 197 | assign 198 | rules line 199 | rules assign 200 ; 201 202setting: 203 IPFY_SET YY_STR YY_NUMBER ';' { do_tuneint($2, $3); } 204 | IPFY_SET YY_STR YY_HEX ';' { do_tuneint($2, $3); } 205 | IPFY_SET YY_STR YY_STR ';' { do_tunestr($2, $3); } 206 ; 207 208line: rule { while ((fr = frtop) != NULL) { 209 frtop = fr->fr_next; 210 fr->fr_next = NULL; 211 if ((fr->fr_type == FR_T_IPF) && 212 (fr->fr_ip.fi_v == 0)) 213 fr->fr_mip.fi_v = 0; 214 /* XXX validate ? */ 215 (*ipfaddfunc)(ipffd, ipfioctls[IPL_LOGIPF], fr); 216 fr->fr_next = frold; 217 frold = fr; 218 } 219 resetlexer(); 220 } 221 | YY_COMMENT 222 ; 223 224xx: { newrule(); } 225 ; 226 227assign: YY_STR assigning YY_STR ';' { set_variable($1, $3); 228 resetlexer(); 229 free($1); 230 free($3); 231 yyvarnext = 0; 232 } 233 ; 234 235assigning: 236 '=' { yyvarnext = 1; } 237 ; 238 239rule: inrule eol 240 | outrule eol 241 ; 242 243eol: | ';' 244 ; 245 246inrule: 247 rulehead markin inopts rulemain ruletail intag ruletail2 248 ; 249 250outrule: 251 rulehead markout outopts rulemain ruletail outtag ruletail2 252 ; 253 254rulehead: 255 xx collection action 256 | xx insert collection action 257 ; 258 259markin: IPFY_IN { fr->fr_flags |= FR_INQUE; } 260 ; 261 262markout: 263 IPFY_OUT { fr->fr_flags |= FR_OUTQUE; } 264 ; 265 266rulemain: 267 ipfrule 268 | bpfrule 269 | exprrule 270 ; 271 272ipfrule: 273 family tos ttl proto ip 274 ; 275 276family: | IPFY_FAMILY IPFY_INET { if (use_inet6 == 1) { 277 YYERROR; 278 } else { 279 frc->fr_family = AF_INET; 280 } 281 } 282 | IPFY_INET { if (use_inet6 == 1) { 283 YYERROR; 284 } else { 285 frc->fr_family = AF_INET; 286 } 287 } 288 | IPFY_FAMILY IPFY_INET6 { if (use_inet6 == -1) { 289 YYERROR; 290 } else { 291 frc->fr_family = AF_INET6; 292 } 293 } 294 | IPFY_INET6 { if (use_inet6 == -1) { 295 YYERROR; 296 } else { 297 frc->fr_family = AF_INET6; 298 } 299 } 300 ; 301 302bpfrule: 303 IPFY_BPFV4 '{' YY_STR '}' { dobpf(4, $3); free($3); } 304 | IPFY_BPFV6 '{' YY_STR '}' { dobpf(6, $3); free($3); } 305 ; 306 307exprrule: 308 IPFY_IPFEXPR '{' YY_STR '}' { doipfexpr($3); } 309 ; 310 311ruletail: 312 with keep head group 313 ; 314 315ruletail2: 316 pps age new rulettl comment 317 ; 318 319intag: settagin matchtagin 320 ; 321 322outtag: settagout matchtagout 323 ; 324 325insert: 326 '@' YY_NUMBER { fr->fr_hits = (U_QUAD_T)$2 + 1; } 327 ; 328 329collection: 330 | YY_NUMBER { fr->fr_collect = $1; } 331 ; 332 333action: block 334 | IPFY_PASS { fr->fr_flags |= FR_PASS; } 335 | IPFY_NOMATCH { fr->fr_flags |= FR_NOMATCH; } 336 | log 337 | IPFY_COUNT { fr->fr_flags |= FR_ACCOUNT; } 338 | decaps { fr->fr_flags |= FR_DECAPSULATE; } 339 | auth 340 | IPFY_SKIP YY_NUMBER { fr->fr_flags |= FR_SKIP; 341 fr->fr_arg = $2; } 342 | IPFY_CALL func 343 | IPFY_CALL IPFY_NOW func { fr->fr_flags |= FR_CALLNOW; } 344 ; 345 346block: blocked 347 | blocked blockreturn 348 ; 349 350blocked: 351 IPFY_BLOCK { fr->fr_flags = FR_BLOCK; } 352 ; 353blockreturn: 354 IPFY_RETICMP { fr->fr_flags |= FR_RETICMP; } 355 | IPFY_RETICMP returncode { fr->fr_flags |= FR_RETICMP; } 356 | IPFY_RETICMPASDST { fr->fr_flags |= FR_FAKEICMP; } 357 | IPFY_RETICMPASDST returncode { fr->fr_flags |= FR_FAKEICMP; } 358 | IPFY_RETRST { fr->fr_flags |= FR_RETRST; } 359 ; 360 361decaps: IPFY_DECAPS 362 | IPFY_DECAPS IPFY_L5AS '(' YY_STR ')' 363 { fr->fr_icode = atoi($4); } 364 ; 365 366log: IPFY_LOG { fr->fr_flags |= FR_LOG; } 367 | IPFY_LOG logoptions { fr->fr_flags |= FR_LOG; } 368 ; 369 370auth: IPFY_AUTH { fr->fr_flags |= FR_AUTH; } 371 | IPFY_AUTH blockreturn { fr->fr_flags |= FR_AUTH;} 372 | IPFY_PREAUTH { fr->fr_flags |= FR_PREAUTH; } 373 ; 374 375func: YY_STR '/' YY_NUMBER 376 { fr->fr_func = nametokva($1, ipfioctls[IPL_LOGIPF]); 377 fr->fr_arg = $3; 378 free($1); 379 } 380 ; 381 382inopts: 383 | inopts inopt 384 ; 385 386inopt: 387 logopt 388 | quick 389 | on 390 | dup 391 | froute 392 | proute 393 | replyto 394 ; 395 396outopts: 397 | outopts outopt 398 ; 399 400outopt: 401 logopt 402 | quick 403 | on 404 | dup 405 | proute 406 | froute 407 | replyto 408 ; 409 410tos: | settos YY_NUMBER { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 411 | settos YY_HEX { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 412 | settos lstart toslist lend 413 ; 414 415settos: IPFY_TOS { setipftype(); } 416 ; 417 418toslist: 419 YY_NUMBER { DOALL(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 420 | YY_HEX { DOREM(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 421 | toslist lmore YY_NUMBER 422 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 423 | toslist lmore YY_HEX 424 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 425 ; 426 427ttl: | setttl YY_NUMBER 428 { DOALL(fr->fr_ttl = $2; fr->fr_mttl = 0xff;) } 429 | setttl lstart ttllist lend 430 ; 431 432lstart: '{' { newlist = 1; fr = frc; added = 0; } 433 ; 434 435lend: '}' { nrules += added; } 436 ; 437 438lmore: lanother { if (newlist == 1) { 439 newlist = 0; 440 } 441 fr = addrule(); 442 if (yycont != NULL) 443 *yycont = 1; 444 } 445 ; 446 447lanother: 448 | ',' 449 ; 450 451setttl: IPFY_TTL { setipftype(); } 452 ; 453 454ttllist: 455 YY_NUMBER { DOREM(fr->fr_ttl = $1; fr->fr_mttl = 0xff;) } 456 | ttllist lmore YY_NUMBER 457 { DOREM(fr->fr_ttl = $3; fr->fr_mttl = 0xff;) } 458 ; 459 460proto: | protox protocol { yyresetdict(); } 461 ; 462 463protox: IPFY_PROTO { setipftype(); 464 fr = frc; 465 yysetdict(NULL); } 466 ; 467 468ip: srcdst flags icmp 469 ; 470 471group: | IPFY_GROUP groupname { DOALL(setgroup(&fr, $2); \ 472 fillgroup(fr);); 473 free($2); 474 } 475 ; 476 477head: | IPFY_HEAD groupname { DOALL(setgrhead(&fr, $2);); 478 free($2); 479 } 480 ; 481 482groupname: 483 YY_STR { $$ = $1; 484 if (strlen($$) >= FR_GROUPLEN) 485 $$[FR_GROUPLEN - 1] = '\0'; 486 } 487 | YY_NUMBER { $$ = malloc(16); 488 sprintf($$, "%d", $1); 489 } 490 ; 491 492settagin: 493 | IPFY_SETTAG '(' taginlist ')' 494 ; 495 496taginlist: 497 taginspec 498 | taginlist ',' taginspec 499 ; 500 501taginspec: 502 logtag 503 ; 504 505nattag: IPFY_NAT '=' YY_STR { DOALL(strncpy(fr->fr_nattag.ipt_tag,\ 506 $3, IPFTAG_LEN);); 507 free($3); } 508 | IPFY_NAT '=' YY_NUMBER { DOALL(sprintf(fr->fr_nattag.ipt_tag,\ 509 "%d", $3 & 0xffffffff);) } 510 ; 511 512logtag: IPFY_LOG '=' YY_NUMBER { DOALL(fr->fr_logtag = $3;) } 513 ; 514 515settagout: 516 | IPFY_SETTAG '(' tagoutlist ')' 517 ; 518 519tagoutlist: 520 tagoutspec 521 | tagoutlist ',' tagoutspec 522 ; 523 524tagoutspec: 525 logtag 526 | nattag 527 ; 528 529matchtagin: 530 | IPFY_MATCHTAG '(' tagoutlist ')' 531 ; 532 533matchtagout: 534 | IPFY_MATCHTAG '(' taginlist ')' 535 ; 536 537pps: | IPFY_PPS YY_NUMBER { DOALL(fr->fr_pps = $2;) } 538 ; 539 540new: | savegroup file restoregroup 541 ; 542 543rulettl: 544 | IPFY_RULETTL YY_NUMBER { DOALL(fr->fr_die = $2;) } 545 ; 546 547comment: 548 | IPFY_COMMENT YY_STR { DOALL(fr->fr_comment = addname(&fr, \ 549 $2);) } 550 ; 551 552savegroup: 553 '{' 554 ; 555 556restoregroup: 557 '}' 558 ; 559 560logopt: log 561 ; 562 563quick: IPFY_QUICK { fr->fr_flags |= FR_QUICK; } 564 ; 565 566on: IPFY_ON onname { setifname(&fr, 0, $2.if1); 567 free($2.if1); 568 if ($2.if2 != NULL) { 569 setifname(&fr, 1, 570 $2.if2); 571 free($2.if2); 572 } 573 } 574 | IPFY_ON lstart onlist lend 575 | IPFY_ON onname IPFY_INVIA vianame { setifname(&fr, 0, $2.if1); 576 free($2.if1); 577 if ($2.if2 != NULL) { 578 setifname(&fr, 1, 579 $2.if2); 580 free($2.if2); 581 } 582 } 583 | IPFY_ON onname IPFY_OUTVIA vianame { setifname(&fr, 0, $2.if1); 584 free($2.if1); 585 if ($2.if2 != NULL) { 586 setifname(&fr, 1, 587 $2.if2); 588 free($2.if2); 589 } 590 } 591 ; 592 593onlist: onname { DOREM(setifname(&fr, 0, $1.if1); \ 594 if ($1.if2 != NULL) \ 595 setifname(&fr, 1, $1.if2); \ 596 ) 597 free($1.if1); 598 if ($1.if2 != NULL) 599 free($1.if2); 600 } 601 | onlist lmore onname { DOREM(setifname(&fr, 0, $3.if1); \ 602 if ($3.if2 != NULL) \ 603 setifname(&fr, 1, $3.if2); \ 604 ) 605 free($3.if1); 606 if ($3.if2 != NULL) 607 free($3.if2); 608 } 609 ; 610 611onname: interfacename { $$.if1 = $1; 612 $$.if2 = NULL; 613 } 614 | interfacename ',' interfacename 615 { $$.if1 = $1; 616 $$.if2 = $3; 617 } 618 ; 619 620vianame: 621 name { setifname(&fr, 2, $1); 622 free($1); 623 } 624 | name ',' name { setifname(&fr, 2, $1); 625 free($1); 626 setifname(&fr, 3, $3); 627 free($3); 628 } 629 ; 630 631dup: IPFY_DUPTO name 632 { int idx = addname(&fr, $2); 633 fr->fr_dif.fd_name = idx; 634 free($2); 635 } 636 | IPFY_DUPTO IPFY_DSTLIST '/' name 637 { int idx = addname(&fr, $4); 638 fr->fr_dif.fd_name = idx; 639 fr->fr_dif.fd_type = FRD_DSTLIST; 640 free($4); 641 } 642 | IPFY_DUPTO name duptoseparator hostname 643 { int idx = addname(&fr, $2); 644 fr->fr_dif.fd_name = idx; 645 fr->fr_dif.fd_ptr = (void *)-1; 646 fr->fr_dif.fd_ip6 = $4.adr; 647 if (fr->fr_family == AF_UNSPEC && $4.f != AF_UNSPEC) 648 fr->fr_family = $4.f; 649 yyexpectaddr = 0; 650 free($2); 651 } 652 ; 653 654duptoseparator: 655 ':' { yyexpectaddr = 1; yycont = &yyexpectaddr; resetaddr(); } 656 ; 657 658froute: IPFY_FROUTE { fr->fr_flags |= FR_FASTROUTE; } 659 ; 660 661proute: routeto name 662 { int idx = addname(&fr, $2); 663 fr->fr_tif.fd_name = idx; 664 free($2); 665 } 666 | routeto IPFY_DSTLIST '/' name 667 { int idx = addname(&fr, $4); 668 fr->fr_tif.fd_name = idx; 669 fr->fr_tif.fd_type = FRD_DSTLIST; 670 free($4); 671 } 672 | routeto name duptoseparator hostname 673 { int idx = addname(&fr, $2); 674 fr->fr_tif.fd_name = idx; 675 fr->fr_tif.fd_ptr = (void *)-1; 676 fr->fr_tif.fd_ip6 = $4.adr; 677 if (fr->fr_family == AF_UNSPEC && $4.f != AF_UNSPEC) 678 fr->fr_family = $4.f; 679 yyexpectaddr = 0; 680 free($2); 681 } 682 ; 683 684routeto: 685 IPFY_TO 686 | IPFY_ROUTETO 687 ; 688 689replyto: 690 IPFY_REPLY_TO name 691 { int idx = addname(&fr, $2); 692 fr->fr_rif.fd_name = idx; 693 free($2); 694 } 695 | IPFY_REPLY_TO IPFY_DSTLIST '/' name 696 { fr->fr_rif.fd_name = addname(&fr, $4); 697 fr->fr_rif.fd_type = FRD_DSTLIST; 698 free($4); 699 } 700 | IPFY_REPLY_TO name duptoseparator hostname 701 { int idx = addname(&fr, $2); 702 fr->fr_rif.fd_name = idx; 703 fr->fr_rif.fd_ptr = (void *)-1; 704 fr->fr_rif.fd_ip6 = $4.adr; 705 if (fr->fr_family == AF_UNSPEC && $4.f != AF_UNSPEC) 706 fr->fr_family = $4.f; 707 free($2); 708 } 709 ; 710 711logoptions: 712 logoption 713 | logoptions logoption 714 ; 715 716logoption: 717 IPFY_BODY { fr->fr_flags |= FR_LOGBODY; } 718 | IPFY_FIRST { fr->fr_flags |= FR_LOGFIRST; } 719 | IPFY_ORBLOCK { fr->fr_flags |= FR_LOGORBLOCK; } 720 | level loglevel { unsetsyslog(); } 721 ; 722 723returncode: 724 starticmpcode icmpcode ')' { fr->fr_icode = $2; yyresetdict(); } 725 ; 726 727starticmpcode: 728 '(' { yysetdict(icmpcodewords); } 729 ; 730 731srcdst: | IPFY_ALL 732 | fromto 733 ; 734 735protocol: 736 YY_NUMBER { DOALL(fr->fr_proto = $1; \ 737 fr->fr_mproto = 0xff;) 738 } 739 | YY_STR { if (!strcmp($1, "tcp-udp")) { 740 DOALL(fr->fr_flx |= FI_TCPUDP; \ 741 fr->fr_mflx |= FI_TCPUDP;) 742 } else { 743 int p = getproto($1); 744 if (p == -1) 745 yyerror("protocol unknown"); 746 DOALL(fr->fr_proto = p; \ 747 fr->fr_mproto = 0xff;) 748 } 749 free($1); 750 } 751 | YY_STR nextstring YY_STR 752 { if (!strcmp($1, "tcp") && 753 !strcmp($3, "udp")) { 754 DOREM(fr->fr_flx |= FI_TCPUDP; \ 755 fr->fr_mflx |= FI_TCPUDP;) 756 } else { 757 YYERROR; 758 } 759 free($1); 760 free($3); 761 } 762 ; 763 764nextstring: 765 '/' { yysetdict(NULL); } 766 ; 767 768fromto: from srcobject to dstobject { yyexpectaddr = 0; yycont = NULL; } 769 | to dstobject { yyexpectaddr = 0; yycont = NULL; } 770 | from srcobject { yyexpectaddr = 0; yycont = NULL; } 771 ; 772 773from: IPFY_FROM { setipftype(); 774 if (fr == NULL) 775 fr = frc; 776 yyexpectaddr = 1; 777 if (yydebug) 778 printf("set yyexpectaddr\n"); 779 yycont = &yyexpectaddr; 780 yysetdict(addrwords); 781 resetaddr(); } 782 ; 783 784to: IPFY_TO { if (fr == NULL) 785 fr = frc; 786 yyexpectaddr = 1; 787 if (yydebug) 788 printf("set yyexpectaddr\n"); 789 yycont = &yyexpectaddr; 790 yysetdict(addrwords); 791 resetaddr(); 792 } 793 ; 794 795with: | andwith withlist 796 ; 797 798andwith: 799 IPFY_WITH { nowith = 0; setipftype(); } 800 | IPFY_AND { nowith = 0; setipftype(); } 801 ; 802 803flags: | startflags flagset 804 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 805 | startflags flagset '/' flagset 806 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 807 | startflags '/' flagset 808 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 809 | startflags YY_NUMBER 810 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 811 | startflags '/' YY_NUMBER 812 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 813 | startflags YY_NUMBER '/' YY_NUMBER 814 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 815 | startflags flagset '/' YY_NUMBER 816 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 817 | startflags YY_NUMBER '/' flagset 818 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 819 ; 820 821startflags: 822 IPFY_FLAGS { if (frc->fr_type != FR_T_IPF) 823 yyerror("flags with non-ipf type rule"); 824 if (frc->fr_proto != IPPROTO_TCP) 825 yyerror("flags with non-TCP rule"); 826 } 827 ; 828 829flagset: 830 YY_STR { $$ = tcpflags($1); free($1); } 831 | YY_HEX { $$ = $1; } 832 ; 833 834srcobject: 835 { yyresetdict(); } fromport 836 | srcaddr srcport 837 | '!' srcaddr srcport 838 { DOALL(fr->fr_flags |= FR_NOTSRCIP;) } 839 ; 840 841srcaddr: 842 addr { build_srcaddr_af(fr, &$1); } 843 | lstart srcaddrlist lend 844 ; 845 846srcaddrlist: 847 addr { build_srcaddr_af(fr, &$1); } 848 | srcaddrlist lmore addr 849 { build_srcaddr_af(fr, &$3); } 850 ; 851 852srcport: 853 | portcomp 854 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 855 | portrange 856 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 857 fr->fr_stop = $1.p2;) } 858 | porteq lstart srcportlist lend 859 { yyresetdict(); } 860 ; 861 862fromport: 863 portcomp 864 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 865 | portrange 866 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 867 fr->fr_stop = $1.p2;) } 868 | porteq lstart srcportlist lend 869 { yyresetdict(); } 870 ; 871 872srcportlist: 873 portnum { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $1;) } 874 | portnum ':' portnum 875 { DOREM(fr->fr_scmp = FR_INCRANGE; fr->fr_sport = $1; \ 876 fr->fr_stop = $3;) } 877 | portnum YY_RANGE_IN portnum 878 { DOREM(fr->fr_scmp = FR_INRANGE; fr->fr_sport = $1; \ 879 fr->fr_stop = $3;) } 880 | srcportlist lmore portnum 881 { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $3;) } 882 | srcportlist lmore portnum ':' portnum 883 { DOREM(fr->fr_scmp = FR_INCRANGE; fr->fr_sport = $3; \ 884 fr->fr_stop = $5;) } 885 | srcportlist lmore portnum YY_RANGE_IN portnum 886 { DOREM(fr->fr_scmp = FR_INRANGE; fr->fr_sport = $3; \ 887 fr->fr_stop = $5;) } 888 ; 889 890dstobject: 891 { yyresetdict(); } toport 892 | dstaddr dstport 893 | '!' dstaddr dstport 894 { DOALL(fr->fr_flags |= FR_NOTDSTIP;) } 895 ; 896 897dstaddr: 898 addr { if (($1.f != AF_UNSPEC) && (frc->fr_family != AF_UNSPEC) && 899 ($1.f != frc->fr_family)) 900 yyerror("1.src/dst address family mismatch"); 901 build_dstaddr_af(fr, &$1); 902 } 903 | lstart dstaddrlist lend 904 ; 905 906dstaddrlist: 907 addr { if (($1.f != AF_UNSPEC) && (frc->fr_family != AF_UNSPEC) && 908 ($1.f != frc->fr_family)) 909 yyerror("2.src/dst address family mismatch"); 910 build_dstaddr_af(fr, &$1); 911 } 912 | dstaddrlist lmore addr 913 { if (($3.f != AF_UNSPEC) && (frc->fr_family != AF_UNSPEC) && 914 ($3.f != frc->fr_family)) 915 yyerror("3.src/dst address family mismatch"); 916 build_dstaddr_af(fr, &$3); 917 } 918 ; 919 920 921dstport: 922 | portcomp 923 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 924 | portrange 925 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 926 fr->fr_dtop = $1.p2;) } 927 | porteq lstart dstportlist lend 928 { yyresetdict(); } 929 ; 930 931toport: 932 portcomp 933 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 934 | portrange 935 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 936 fr->fr_dtop = $1.p2;) } 937 | porteq lstart dstportlist lend 938 { yyresetdict(); } 939 ; 940 941dstportlist: 942 portnum { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $1;) } 943 | portnum ':' portnum 944 { DOREM(fr->fr_dcmp = FR_INCRANGE; fr->fr_dport = $1; \ 945 fr->fr_dtop = $3;) } 946 | portnum YY_RANGE_IN portnum 947 { DOREM(fr->fr_dcmp = FR_INRANGE; fr->fr_dport = $1; \ 948 fr->fr_dtop = $3;) } 949 | dstportlist lmore portnum 950 { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $3;) } 951 | dstportlist lmore portnum ':' portnum 952 { DOREM(fr->fr_dcmp = FR_INCRANGE; fr->fr_dport = $3; \ 953 fr->fr_dtop = $5;) } 954 | dstportlist lmore portnum YY_RANGE_IN portnum 955 { DOREM(fr->fr_dcmp = FR_INRANGE; fr->fr_dport = $3; \ 956 fr->fr_dtop = $5;) } 957 ; 958 959addr: pool '/' YY_NUMBER { pooled = 1; 960 yyexpectaddr = 0; 961 $$.type = FRI_LOOKUP; 962 $$.v = 0; 963 $$.ifpos = -1; 964 $$.f = AF_UNSPEC; 965 $$.a.iplookuptype = IPLT_POOL; 966 $$.a.iplookupsubtype = 0; 967 $$.a.iplookupnum = $3; } 968 | pool '/' YY_STR { pooled = 1; 969 $$.ifpos = -1; 970 $$.f = AF_UNSPEC; 971 $$.type = FRI_LOOKUP; 972 $$.a.iplookuptype = IPLT_POOL; 973 $$.a.iplookupsubtype = 1; 974 $$.a.iplookupname = addname(&fr, $3); 975 } 976 | pool '=' '(' { yyexpectaddr = 1; 977 pooled = 1; 978 } 979 poollist ')' { yyexpectaddr = 0; 980 $$.v = 0; 981 $$.ifpos = -1; 982 $$.f = AF_UNSPEC; 983 $$.type = FRI_LOOKUP; 984 $$.a.iplookuptype = IPLT_POOL; 985 $$.a.iplookupsubtype = 0; 986 $$.a.iplookupnum = makepool($5); 987 } 988 | hash '/' YY_NUMBER { hashed = 1; 989 yyexpectaddr = 0; 990 $$.v = 0; 991 $$.ifpos = -1; 992 $$.f = AF_UNSPEC; 993 $$.type = FRI_LOOKUP; 994 $$.a.iplookuptype = IPLT_HASH; 995 $$.a.iplookupsubtype = 0; 996 $$.a.iplookupnum = $3; 997 } 998 | hash '/' YY_STR { hashed = 1; 999 $$.type = FRI_LOOKUP; 1000 $$.v = 0; 1001 $$.ifpos = -1; 1002 $$.f = AF_UNSPEC; 1003 $$.a.iplookuptype = IPLT_HASH; 1004 $$.a.iplookupsubtype = 1; 1005 $$.a.iplookupname = addname(&fr, $3); 1006 } 1007 | hash '=' '(' { hashed = 1; 1008 yyexpectaddr = 1; 1009 } 1010 addrlist ')' { yyexpectaddr = 0; 1011 $$.v = 0; 1012 $$.ifpos = -1; 1013 $$.f = AF_UNSPEC; 1014 $$.type = FRI_LOOKUP; 1015 $$.a.iplookuptype = IPLT_HASH; 1016 $$.a.iplookupsubtype = 0; 1017 $$.a.iplookupnum = makehash($5); 1018 } 1019 | ipaddr { $$ = $1; 1020 yyexpectaddr = 0; } 1021 ; 1022 1023ipaddr: IPFY_ANY { bzero(&($$), sizeof($$)); 1024 $$.type = FRI_NORMAL; 1025 $$.ifpos = -1; 1026 yyexpectaddr = 0; 1027 } 1028 | hostname { $$.a = $1.adr; 1029 $$.f = $1.f; 1030 if ($1.f == AF_INET6) 1031 fill6bits(128, $$.m.i6); 1032 else if ($1.f == AF_INET) 1033 fill6bits(32, $$.m.i6); 1034 $$.v = ftov($1.f); 1035 $$.ifpos = dynamic; 1036 $$.type = FRI_NORMAL; 1037 } 1038 | hostname { yyresetdict(); } 1039 maskspace { yysetdict(maskwords); 1040 yyexpectaddr = 2; } 1041 ipmask { ntomask($1.f, $5, $$.m.i6); 1042 $$.a = $1.adr; 1043 $$.a.i6[0] &= $$.m.i6[0]; 1044 $$.a.i6[1] &= $$.m.i6[1]; 1045 $$.a.i6[2] &= $$.m.i6[2]; 1046 $$.a.i6[3] &= $$.m.i6[3]; 1047 $$.f = $1.f; 1048 $$.v = ftov($1.f); 1049 $$.type = ifpflag; 1050 $$.ifpos = dynamic; 1051 if (ifpflag != 0 && $$.v == 0) { 1052 if (frc->fr_family == AF_INET6){ 1053 $$.v = 6; 1054 $$.f = AF_INET6; 1055 } else { 1056 $$.v = 4; 1057 $$.f = AF_INET; 1058 } 1059 } 1060 yyresetdict(); 1061 yyexpectaddr = 0; 1062 } 1063 | '(' YY_STR ')' { $$.type = FRI_DYNAMIC; 1064 ifpflag = FRI_DYNAMIC; 1065 $$.ifpos = addname(&fr, $2); 1066 $$.lif = 0; 1067 } 1068 | '(' YY_STR ')' '/' 1069 { ifpflag = FRI_DYNAMIC; yysetdict(maskwords); } 1070 maskopts 1071 { $$.type = ifpflag; 1072 $$.ifpos = addname(&fr, $2); 1073 $$.lif = 0; 1074 if (frc->fr_family == AF_UNSPEC) 1075 frc->fr_family = AF_INET; 1076 if (ifpflag == FRI_DYNAMIC) { 1077 ntomask(frc->fr_family, 1078 $6, $$.m.i6); 1079 } 1080 yyresetdict(); 1081 yyexpectaddr = 0; 1082 } 1083 | '(' YY_STR ':' YY_NUMBER ')' '/' 1084 { ifpflag = FRI_DYNAMIC; yysetdict(maskwords); } 1085 maskopts 1086 { $$.type = ifpflag; 1087 $$.ifpos = addname(&fr, $2); 1088 $$.lif = $4; 1089 if (frc->fr_family == AF_UNSPEC) 1090 frc->fr_family = AF_INET; 1091 if (ifpflag == FRI_DYNAMIC) { 1092 ntomask(frc->fr_family, 1093 $8, $$.m.i6); 1094 } 1095 yyresetdict(); 1096 yyexpectaddr = 0; 1097 } 1098 ; 1099 1100maskspace: 1101 '/' 1102 | IPFY_MASK 1103 ; 1104 1105ipmask: ipv4 { $$ = count4bits($1.s_addr); } 1106 | YY_HEX { $$ = count4bits(htonl($1)); } 1107 | YY_NUMBER { $$ = $1; } 1108 | YY_IPV6 { $$ = count6bits($1.i6); } 1109 | maskopts { $$ = $1; } 1110 ; 1111 1112maskopts: 1113 IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 1114 ifpflag = FRI_BROADCAST; 1115 } else { 1116 YYERROR; 1117 } 1118 $$ = 0; 1119 } 1120 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 1121 ifpflag = FRI_NETWORK; 1122 } else { 1123 YYERROR; 1124 } 1125 $$ = 0; 1126 } 1127 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 1128 ifpflag = FRI_NETMASKED; 1129 } else { 1130 YYERROR; 1131 } 1132 $$ = 0; 1133 } 1134 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 1135 ifpflag = FRI_PEERADDR; 1136 } else { 1137 YYERROR; 1138 } 1139 $$ = 0; 1140 } 1141 | YY_NUMBER { $$ = $1; } 1142 ; 1143 1144hostname: 1145 ipv4 { $$.adr.in4 = $1; 1146 if (frc->fr_family == AF_INET6) 1147 YYERROR; 1148 $$.f = AF_INET; 1149 yyexpectaddr = 2; 1150 } 1151 | YY_NUMBER { if (frc->fr_family == AF_INET6) 1152 YYERROR; 1153 $$.adr.in4_addr = $1; 1154 $$.f = AF_INET; 1155 yyexpectaddr = 2; 1156 } 1157 | YY_HEX { if (frc->fr_family == AF_INET6) 1158 YYERROR; 1159 $$.adr.in4_addr = $1; 1160 $$.f = AF_INET; 1161 yyexpectaddr = 2; 1162 } 1163 | YY_STR { if (lookuphost($1, &$$.adr) == 0) 1164 $$.f = AF_INET; 1165 free($1); 1166 yyexpectaddr = 2; 1167 } 1168 | YY_IPV6 { if (frc->fr_family == AF_INET) 1169 YYERROR; 1170 $$.adr = $1; 1171 $$.f = AF_INET6; 1172 yyexpectaddr = 2; 1173 } 1174 ; 1175 1176addrlist: 1177 ipaddr { $$ = newalist(NULL); 1178 $$->al_family = $1.f; 1179 $$->al_i6addr = $1.a; 1180 $$->al_i6mask = $1.m; 1181 } 1182 | ipaddr ',' { yyexpectaddr = 1; } addrlist 1183 { $$ = newalist($4); 1184 $$->al_family = $1.f; 1185 $$->al_i6addr = $1.a; 1186 $$->al_i6mask = $1.m; 1187 } 1188 ; 1189 1190pool: IPFY_POOL { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1191 ; 1192 1193hash: IPFY_HASH { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1194 ; 1195 1196poollist: 1197 ipaddr { $$ = newalist(NULL); 1198 $$->al_family = $1.f; 1199 $$->al_i6addr = $1.a; 1200 $$->al_i6mask = $1.m; 1201 } 1202 | '!' ipaddr { $$ = newalist(NULL); 1203 $$->al_not = 1; 1204 $$->al_family = $2.f; 1205 $$->al_i6addr = $2.a; 1206 $$->al_i6mask = $2.m; 1207 } 1208 | poollist ',' ipaddr 1209 { $$ = newalist($1); 1210 $$->al_family = $3.f; 1211 $$->al_i6addr = $3.a; 1212 $$->al_i6mask = $3.m; 1213 } 1214 | poollist ',' '!' ipaddr 1215 { $$ = newalist($1); 1216 $$->al_not = 1; 1217 $$->al_family = $4.f; 1218 $$->al_i6addr = $4.a; 1219 $$->al_i6mask = $4.m; 1220 } 1221 ; 1222 1223port: IPFY_PORT { yyexpectaddr = 0; 1224 yycont = NULL; 1225 if (frc->fr_proto != 0 && 1226 frc->fr_proto != IPPROTO_UDP && 1227 frc->fr_proto != IPPROTO_TCP) 1228 yyerror("port use incorrect"); 1229 } 1230 ; 1231 1232portc: port compare { $$ = $2; 1233 yysetdict(NULL); 1234 } 1235 | porteq { $$ = $1; } 1236 ; 1237 1238porteq: port '=' { $$ = FR_EQUAL; 1239 yysetdict(NULL); 1240 } 1241 ; 1242 1243portr: IPFY_PORT { yyexpectaddr = 0; 1244 yycont = NULL; 1245 yysetdict(NULL); 1246 } 1247 ; 1248 1249portcomp: 1250 portc portnum { $$.pc = $1; 1251 $$.p1 = $2; 1252 yyresetdict(); 1253 } 1254 ; 1255 1256portrange: 1257 portr portnum range portnum { $$.p1 = $2; 1258 $$.pc = $3; 1259 $$.p2 = $4; 1260 yyresetdict(); 1261 } 1262 ; 1263 1264icmp: | itype icode 1265 ; 1266 1267itype: seticmptype icmptype 1268 { DOALL(fr->fr_icmp = htons($2 << 8); fr->fr_icmpm = htons(0xff00);); 1269 yyresetdict(); 1270 } 1271 | seticmptype lstart typelist lend { yyresetdict(); } 1272 ; 1273 1274seticmptype: 1275 IPFY_ICMPTYPE { if (frc->fr_family == AF_UNSPEC) 1276 frc->fr_family = AF_INET; 1277 if (frc->fr_family == AF_INET && 1278 frc->fr_type == FR_T_IPF && 1279 frc->fr_proto != IPPROTO_ICMP) { 1280 yyerror("proto not icmp"); 1281 } 1282 if (frc->fr_family == AF_INET6 && 1283 frc->fr_type == FR_T_IPF && 1284 frc->fr_proto != IPPROTO_ICMPV6) { 1285 yyerror("proto not ipv6-icmp"); 1286 } 1287 setipftype(); 1288 DOALL(if (fr->fr_family == AF_INET) { \ 1289 fr->fr_ip.fi_v = 4; \ 1290 fr->fr_mip.fi_v = 0xf; \ 1291 } 1292 if (fr->fr_family == AF_INET6) { \ 1293 fr->fr_ip.fi_v = 6; \ 1294 fr->fr_mip.fi_v = 0xf; \ 1295 } 1296 ) 1297 yysetdict(NULL); 1298 } 1299 ; 1300 1301icode: | seticmpcode icmpcode 1302 { DOALL(fr->fr_icmp |= htons($2); fr->fr_icmpm |= htons(0xff);); 1303 yyresetdict(); 1304 } 1305 | seticmpcode lstart codelist lend { yyresetdict(); } 1306 ; 1307 1308seticmpcode: 1309 IPFY_ICMPCODE { yysetdict(icmpcodewords); } 1310 ; 1311 1312typelist: 1313 icmptype 1314 { DOREM(fr->fr_icmp = htons($1 << 8); fr->fr_icmpm = htons(0xff00);) } 1315 | typelist lmore icmptype 1316 { DOREM(fr->fr_icmp = htons($3 << 8); fr->fr_icmpm = htons(0xff00);) } 1317 ; 1318 1319codelist: 1320 icmpcode 1321 { DOREM(fr->fr_icmp |= htons($1); fr->fr_icmpm |= htons(0xff);) } 1322 | codelist lmore icmpcode 1323 { DOREM(fr->fr_icmp &= htons(0xff00); fr->fr_icmp |= htons($3); \ 1324 fr->fr_icmpm |= htons(0xff);) } 1325 ; 1326 1327age: | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1328 fr->fr_age[1] = $2;) } 1329 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1330 { DOALL(fr->fr_age[0] = $2; \ 1331 fr->fr_age[1] = $4;) } 1332 ; 1333 1334keep: | IPFY_KEEP keepstate keep 1335 | IPFY_KEEP keepfrag keep 1336 ; 1337 1338keepstate: 1339 IPFY_STATE stateoptlist { DOALL(fr->fr_flags |= FR_KEEPSTATE;)} 1340 ; 1341 1342keepfrag: 1343 IPFY_FRAGS fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1344 | IPFY_FRAG fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1345 ; 1346 1347fragoptlist: 1348 | '(' fragopts ')' 1349 ; 1350 1351fragopts: 1352 fragopt lanother fragopts 1353 | fragopt 1354 ; 1355 1356fragopt: 1357 IPFY_STRICT { DOALL(fr->fr_flags |= FR_FRSTRICT;) } 1358 ; 1359 1360stateoptlist: 1361 | '(' stateopts ')' 1362 ; 1363 1364stateopts: 1365 stateopt lanother stateopts 1366 | stateopt 1367 ; 1368 1369stateopt: 1370 IPFY_LIMIT YY_NUMBER { DOALL(fr->fr_statemax = $2;) } 1371 | IPFY_STRICT { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1372 YYERROR; \ 1373 } else if (fr->fr_flags & FR_STLOOSE) {\ 1374 YYERROR; \ 1375 } else \ 1376 fr->fr_flags |= FR_STSTRICT;) 1377 } 1378 | IPFY_LOOSE { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1379 YYERROR; \ 1380 } else if (fr->fr_flags & FR_STSTRICT){\ 1381 YYERROR; \ 1382 } else \ 1383 fr->fr_flags |= FR_STLOOSE;) 1384 } 1385 | IPFY_NEWISN { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1386 YYERROR; \ 1387 } else \ 1388 fr->fr_flags |= FR_NEWISN;) 1389 } 1390 | IPFY_NOICMPERR { DOALL(fr->fr_flags |= FR_NOICMPERR;) } 1391 1392 | IPFY_SYNC { DOALL(fr->fr_flags |= FR_STATESYNC;) } 1393 | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1394 fr->fr_age[1] = $2;) } 1395 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1396 { DOALL(fr->fr_age[0] = $2; \ 1397 fr->fr_age[1] = $4;) } 1398 | IPFY_ICMPHEAD groupname 1399 { DOALL(seticmphead(&fr, $2);) 1400 free($2); 1401 } 1402 | IPFY_NOLOG 1403 { DOALL(fr->fr_nostatelog = 1;) } 1404 | IPFY_RPC 1405 { DOALL(fr->fr_rpc = 1;) } 1406 | IPFY_RPC IPFY_IN YY_STR 1407 { DOALL(fr->fr_rpc = 1;) } 1408 | IPFY_MAX_SRCS YY_NUMBER 1409 { DOALL(fr->fr_srctrack.ht_max_nodes = $2;) } 1410 | IPFY_MAX_PER_SRC YY_NUMBER 1411 { DOALL(fr->fr_srctrack.ht_max_per_node = $2; \ 1412 fr->fr_srctrack.ht_netmask = \ 1413 fr->fr_family == AF_INET ? 32: 128;) 1414 } 1415 | IPFY_MAX_PER_SRC YY_NUMBER '/' YY_NUMBER 1416 { DOALL(fr->fr_srctrack.ht_max_per_node = $2; \ 1417 fr->fr_srctrack.ht_netmask = $4;) 1418 } 1419 ; 1420 1421portnum: 1422 servicename { if (getport(frc, $1, 1423 &($$), NULL) == -1) 1424 yyerror("service unknown"); 1425 $$ = ntohs($$); 1426 free($1); 1427 } 1428 | YY_NUMBER { if ($1 > 65535) /* Unsigned */ 1429 yyerror("invalid port number"); 1430 else 1431 $$ = $1; 1432 } 1433 ; 1434 1435withlist: 1436 withopt { nowith = 0; } 1437 | withlist withopt { nowith = 0; } 1438 | withlist ',' withopt { nowith = 0; } 1439 ; 1440 1441withopt: 1442 opttype { DOALL(fr->fr_flx |= $1; fr->fr_mflx |= $1;) } 1443 | notwith opttype { DOALL(fr->fr_mflx |= $2;) } 1444 | ipopt ipopts { yyresetdict(); } 1445 | notwith ipopt ipopts { yyresetdict(); } 1446 | startv6hdr ipv6hdrs { yyresetdict(); } 1447 ; 1448 1449ipopt: IPFY_OPT { yysetdict(ipv4optwords); } 1450 ; 1451 1452startv6hdr: 1453 IPFY_V6HDR { if (frc->fr_family != AF_INET6) 1454 yyerror("only available with IPv6"); 1455 yysetdict(ipv6optwords); 1456 } 1457 ; 1458 1459notwith: 1460 IPFY_NOT { nowith = 1; } 1461 | IPFY_NO { nowith = 1; } 1462 ; 1463 1464opttype: 1465 IPFY_IPOPTS { $$ = FI_OPTIONS; } 1466 | IPFY_SHORT { $$ = FI_SHORT; } 1467 | IPFY_NAT { $$ = FI_NATED; } 1468 | IPFY_BAD { $$ = FI_BAD; } 1469 | IPFY_BADNAT { $$ = FI_BADNAT; } 1470 | IPFY_BADSRC { $$ = FI_BADSRC; } 1471 | IPFY_LOWTTL { $$ = FI_LOWTTL; } 1472 | IPFY_FRAG { $$ = FI_FRAG; } 1473 | IPFY_FRAGBODY { $$ = FI_FRAGBODY; } 1474 | IPFY_FRAGS { $$ = FI_FRAG; } 1475 | IPFY_MBCAST { $$ = FI_MBCAST; } 1476 | IPFY_MULTICAST { $$ = FI_MULTICAST; } 1477 | IPFY_BROADCAST { $$ = FI_BROADCAST; } 1478 | IPFY_STATE { $$ = FI_STATE; } 1479 | IPFY_OOW { $$ = FI_OOW; } 1480 | IPFY_AH { $$ = FI_AH; } 1481 | IPFY_V6HDRS { $$ = FI_V6EXTHDR; } 1482 ; 1483 1484ipopts: optlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1485 if (fr->fr_family == AF_UNSPEC) { 1486 fr->fr_family = AF_INET; 1487 fr->fr_ip.fi_v = 4; 1488 fr->fr_mip.fi_v = 0xf; 1489 } else if (fr->fr_family != AF_INET) { 1490 YYERROR; 1491 } 1492 if (!nowith) 1493 fr->fr_ip.fi_optmsk |= $1;) 1494 } 1495 ; 1496 1497optlist: 1498 opt { $$ |= $1; } 1499 | optlist ',' opt { $$ |= $1 | $3; } 1500 ; 1501 1502ipv6hdrs: 1503 ipv6hdrlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1504 if (!nowith) 1505 fr->fr_ip.fi_optmsk |= $1;) 1506 } 1507 ; 1508 1509ipv6hdrlist: 1510 ipv6hdr { $$ |= $1; } 1511 | ipv6hdrlist ',' ipv6hdr { $$ |= $1 | $3; } 1512 ; 1513 1514secname: 1515 seclevel { $$ |= $1; } 1516 | secname ',' seclevel { $$ |= $1 | $3; } 1517 ; 1518 1519seclevel: 1520 IPFY_SEC_UNC { $$ = secbit(IPSO_CLASS_UNCL); } 1521 | IPFY_SEC_CONF { $$ = secbit(IPSO_CLASS_CONF); } 1522 | IPFY_SEC_RSV1 { $$ = secbit(IPSO_CLASS_RES1); } 1523 | IPFY_SEC_RSV2 { $$ = secbit(IPSO_CLASS_RES2); } 1524 | IPFY_SEC_RSV3 { $$ = secbit(IPSO_CLASS_RES3); } 1525 | IPFY_SEC_RSV4 { $$ = secbit(IPSO_CLASS_RES4); } 1526 | IPFY_SEC_SEC { $$ = secbit(IPSO_CLASS_SECR); } 1527 | IPFY_SEC_TS { $$ = secbit(IPSO_CLASS_TOPS); } 1528 ; 1529 1530icmptype: 1531 YY_NUMBER { $$ = $1; } 1532 | YY_STR { $$ = geticmptype(frc->fr_family, $1); 1533 if ($$ == -1) 1534 yyerror("unrecognised icmp type"); 1535 } 1536 ; 1537 1538icmpcode: 1539 YY_NUMBER { $$ = $1; } 1540 | IPFY_ICMPC_NETUNR { $$ = ICMP_UNREACH_NET; } 1541 | IPFY_ICMPC_HSTUNR { $$ = ICMP_UNREACH_HOST; } 1542 | IPFY_ICMPC_PROUNR { $$ = ICMP_UNREACH_PROTOCOL; } 1543 | IPFY_ICMPC_PORUNR { $$ = ICMP_UNREACH_PORT; } 1544 | IPFY_ICMPC_NEEDF { $$ = ICMP_UNREACH_NEEDFRAG; } 1545 | IPFY_ICMPC_SRCFAIL { $$ = ICMP_UNREACH_SRCFAIL; } 1546 | IPFY_ICMPC_NETUNK { $$ = ICMP_UNREACH_NET_UNKNOWN; } 1547 | IPFY_ICMPC_HSTUNK { $$ = ICMP_UNREACH_HOST_UNKNOWN; } 1548 | IPFY_ICMPC_ISOLATE { $$ = ICMP_UNREACH_ISOLATED; } 1549 | IPFY_ICMPC_NETPRO { $$ = ICMP_UNREACH_NET_PROHIB; } 1550 | IPFY_ICMPC_HSTPRO { $$ = ICMP_UNREACH_HOST_PROHIB; } 1551 | IPFY_ICMPC_NETTOS { $$ = ICMP_UNREACH_TOSNET; } 1552 | IPFY_ICMPC_HSTTOS { $$ = ICMP_UNREACH_TOSHOST; } 1553 | IPFY_ICMPC_FLTPRO { $$ = ICMP_UNREACH_ADMIN_PROHIBIT; } 1554 | IPFY_ICMPC_HSTPRE { $$ = 14; } 1555 | IPFY_ICMPC_CUTPRE { $$ = 15; } 1556 ; 1557 1558opt: 1559 IPFY_IPOPT_NOP { $$ = getoptbyvalue(IPOPT_NOP); } 1560 | IPFY_IPOPT_RR { $$ = getoptbyvalue(IPOPT_RR); } 1561 | IPFY_IPOPT_ZSU { $$ = getoptbyvalue(IPOPT_ZSU); } 1562 | IPFY_IPOPT_MTUP { $$ = getoptbyvalue(IPOPT_MTUP); } 1563 | IPFY_IPOPT_MTUR { $$ = getoptbyvalue(IPOPT_MTUR); } 1564 | IPFY_IPOPT_ENCODE { $$ = getoptbyvalue(IPOPT_ENCODE); } 1565 | IPFY_IPOPT_TS { $$ = getoptbyvalue(IPOPT_TS); } 1566 | IPFY_IPOPT_TR { $$ = getoptbyvalue(IPOPT_TR); } 1567 | IPFY_IPOPT_SEC { $$ = getoptbyvalue(IPOPT_SECURITY); } 1568 | IPFY_IPOPT_LSRR { $$ = getoptbyvalue(IPOPT_LSRR); } 1569 | IPFY_IPOPT_ESEC { $$ = getoptbyvalue(IPOPT_E_SEC); } 1570 | IPFY_IPOPT_CIPSO { $$ = getoptbyvalue(IPOPT_CIPSO); } 1571 | IPFY_IPOPT_CIPSO doi { $$ = getoptbyvalue(IPOPT_CIPSO); } 1572 | IPFY_IPOPT_SATID { $$ = getoptbyvalue(IPOPT_SATID); } 1573 | IPFY_IPOPT_SSRR { $$ = getoptbyvalue(IPOPT_SSRR); } 1574 | IPFY_IPOPT_ADDEXT { $$ = getoptbyvalue(IPOPT_ADDEXT); } 1575 | IPFY_IPOPT_VISA { $$ = getoptbyvalue(IPOPT_VISA); } 1576 | IPFY_IPOPT_IMITD { $$ = getoptbyvalue(IPOPT_IMITD); } 1577 | IPFY_IPOPT_EIP { $$ = getoptbyvalue(IPOPT_EIP); } 1578 | IPFY_IPOPT_FINN { $$ = getoptbyvalue(IPOPT_FINN); } 1579 | IPFY_IPOPT_DPS { $$ = getoptbyvalue(IPOPT_DPS); } 1580 | IPFY_IPOPT_SDB { $$ = getoptbyvalue(IPOPT_SDB); } 1581 | IPFY_IPOPT_NSAPA { $$ = getoptbyvalue(IPOPT_NSAPA); } 1582 | IPFY_IPOPT_RTRALRT { $$ = getoptbyvalue(IPOPT_RTRALRT); } 1583 | IPFY_IPOPT_UMP { $$ = getoptbyvalue(IPOPT_UMP); } 1584 | setsecclass secname 1585 { DOALL(fr->fr_mip.fi_secmsk |= $2; 1586 if (fr->fr_family == AF_UNSPEC) { 1587 fr->fr_family = AF_INET; 1588 fr->fr_ip.fi_v = 4; 1589 fr->fr_mip.fi_v = 0xf; 1590 } else if (fr->fr_family != AF_INET) { 1591 YYERROR; 1592 } 1593 if (!nowith) 1594 fr->fr_ip.fi_secmsk |= $2;) 1595 $$ = 0; 1596 yyresetdict(); 1597 } 1598 ; 1599 1600setsecclass: 1601 IPFY_SECCLASS { yysetdict(ipv4secwords); } 1602 ; 1603 1604doi: IPFY_DOI YY_NUMBER { DOALL(fr->fr_doimask = 0xffffffff; \ 1605 if (!nowith) \ 1606 fr->fr_doi = $2;) } 1607 | IPFY_DOI YY_HEX { DOALL(fr->fr_doimask = 0xffffffff; \ 1608 if (!nowith) \ 1609 fr->fr_doi = $2;) } 1610 ; 1611 1612ipv6hdr: 1613 IPFY_AH { $$ = getv6optbyvalue(IPPROTO_AH); } 1614 | IPFY_IPV6OPT_DSTOPTS { $$ = getv6optbyvalue(IPPROTO_DSTOPTS); } 1615 | IPFY_IPV6OPT_ESP { $$ = getv6optbyvalue(IPPROTO_ESP); } 1616 | IPFY_IPV6OPT_HOPOPTS { $$ = getv6optbyvalue(IPPROTO_HOPOPTS); } 1617 | IPFY_IPV6OPT_IPV6 { $$ = getv6optbyvalue(IPPROTO_IPV6); } 1618 | IPFY_IPV6OPT_NONE { $$ = getv6optbyvalue(IPPROTO_NONE); } 1619 | IPFY_IPV6OPT_ROUTING { $$ = getv6optbyvalue(IPPROTO_ROUTING); } 1620 | IPFY_IPV6OPT_FRAG { $$ = getv6optbyvalue(IPPROTO_FRAGMENT); } 1621 | IPFY_IPV6OPT_MOBILITY { $$ = getv6optbyvalue(IPPROTO_MOBILITY); } 1622 ; 1623 1624level: IPFY_LEVEL { setsyslog(); } 1625 ; 1626 1627loglevel: 1628 priority { fr->fr_loglevel = LOG_LOCAL0|$1; } 1629 | facility '.' priority { fr->fr_loglevel = $1 | $3; } 1630 ; 1631 1632facility: 1633 IPFY_FAC_KERN { $$ = LOG_KERN; } 1634 | IPFY_FAC_USER { $$ = LOG_USER; } 1635 | IPFY_FAC_MAIL { $$ = LOG_MAIL; } 1636 | IPFY_FAC_DAEMON { $$ = LOG_DAEMON; } 1637 | IPFY_FAC_AUTH { $$ = LOG_AUTH; } 1638 | IPFY_FAC_SYSLOG { $$ = LOG_SYSLOG; } 1639 | IPFY_FAC_LPR { $$ = LOG_LPR; } 1640 | IPFY_FAC_NEWS { $$ = LOG_NEWS; } 1641 | IPFY_FAC_UUCP { $$ = LOG_UUCP; } 1642 | IPFY_FAC_CRON { $$ = LOG_CRON; } 1643 | IPFY_FAC_FTP { $$ = LOG_FTP; } 1644 | IPFY_FAC_AUTHPRIV { $$ = LOG_AUTHPRIV; } 1645 | IPFY_FAC_AUDIT { $$ = LOG_AUDIT; } 1646 | IPFY_FAC_LFMT { $$ = LOG_LFMT; } 1647 | IPFY_FAC_LOCAL0 { $$ = LOG_LOCAL0; } 1648 | IPFY_FAC_LOCAL1 { $$ = LOG_LOCAL1; } 1649 | IPFY_FAC_LOCAL2 { $$ = LOG_LOCAL2; } 1650 | IPFY_FAC_LOCAL3 { $$ = LOG_LOCAL3; } 1651 | IPFY_FAC_LOCAL4 { $$ = LOG_LOCAL4; } 1652 | IPFY_FAC_LOCAL5 { $$ = LOG_LOCAL5; } 1653 | IPFY_FAC_LOCAL6 { $$ = LOG_LOCAL6; } 1654 | IPFY_FAC_LOCAL7 { $$ = LOG_LOCAL7; } 1655 | IPFY_FAC_SECURITY { $$ = LOG_SECURITY; } 1656 ; 1657 1658priority: 1659 IPFY_PRI_EMERG { $$ = LOG_EMERG; } 1660 | IPFY_PRI_ALERT { $$ = LOG_ALERT; } 1661 | IPFY_PRI_CRIT { $$ = LOG_CRIT; } 1662 | IPFY_PRI_ERR { $$ = LOG_ERR; } 1663 | IPFY_PRI_WARN { $$ = LOG_WARNING; } 1664 | IPFY_PRI_NOTICE { $$ = LOG_NOTICE; } 1665 | IPFY_PRI_INFO { $$ = LOG_INFO; } 1666 | IPFY_PRI_DEBUG { $$ = LOG_DEBUG; } 1667 ; 1668 1669compare: 1670 YY_CMP_EQ { $$ = FR_EQUAL; } 1671 | YY_CMP_NE { $$ = FR_NEQUAL; } 1672 | YY_CMP_LT { $$ = FR_LESST; } 1673 | YY_CMP_LE { $$ = FR_LESSTE; } 1674 | YY_CMP_GT { $$ = FR_GREATERT; } 1675 | YY_CMP_GE { $$ = FR_GREATERTE; } 1676 ; 1677 1678range: YY_RANGE_IN { $$ = FR_INRANGE; } 1679 | YY_RANGE_OUT { $$ = FR_OUTRANGE; } 1680 | ':' { $$ = FR_INCRANGE; } 1681 ; 1682 1683servicename: 1684 YY_STR { $$ = $1; } 1685 ; 1686 1687interfacename: name { $$ = $1; } 1688 | name ':' YY_NUMBER 1689 { $$ = $1; 1690 fprintf(stderr, "%d: Logical interface %s:%d unsupported, " 1691 "use the physical interface %s instead.\n", 1692 yylineNum, $1, $3, $1); 1693 } 1694 ; 1695 1696name: YY_STR { $$ = $1; } 1697 | '-' { $$ = strdup("-"); } 1698 ; 1699 1700ipv4_16: 1701 YY_NUMBER '.' YY_NUMBER 1702 { if ($1 > 255 || $3 > 255) { 1703 yyerror("Invalid octet string for IP address"); 1704 return 0; 1705 } 1706 $$.s_addr = ($1 << 24) | ($3 << 16); 1707 $$.s_addr = htonl($$.s_addr); 1708 } 1709 ; 1710 1711ipv4_24: 1712 ipv4_16 '.' YY_NUMBER 1713 { if ($3 > 255) { 1714 yyerror("Invalid octet string for IP address"); 1715 return 0; 1716 } 1717 $$.s_addr |= htonl($3 << 8); 1718 } 1719 ; 1720 1721ipv4: ipv4_24 '.' YY_NUMBER 1722 { if ($3 > 255) { 1723 yyerror("Invalid octet string for IP address"); 1724 return 0; 1725 } 1726 $$.s_addr |= htonl($3); 1727 } 1728 | ipv4_24 1729 | ipv4_16 1730 ; 1731 1732%% 1733 1734 1735static struct wordtab ipfwords[] = { 1736 { "age", IPFY_AGE }, 1737 { "ah", IPFY_AH }, 1738 { "all", IPFY_ALL }, 1739 { "and", IPFY_AND }, 1740 { "auth", IPFY_AUTH }, 1741 { "bad", IPFY_BAD }, 1742 { "bad-nat", IPFY_BADNAT }, 1743 { "bad-src", IPFY_BADSRC }, 1744 { "bcast", IPFY_BROADCAST }, 1745 { "block", IPFY_BLOCK }, 1746 { "body", IPFY_BODY }, 1747 { "bpf-v4", IPFY_BPFV4 }, 1748#ifdef USE_INET6 1749 { "bpf-v6", IPFY_BPFV6 }, 1750#endif 1751 { "call", IPFY_CALL }, 1752 { "code", IPFY_ICMPCODE }, 1753 { "comment", IPFY_COMMENT }, 1754 { "count", IPFY_COUNT }, 1755 { "decapsulate", IPFY_DECAPS }, 1756 { "dstlist", IPFY_DSTLIST }, 1757 { "doi", IPFY_DOI }, 1758 { "dup-to", IPFY_DUPTO }, 1759 { "eq", YY_CMP_EQ }, 1760 { "esp", IPFY_ESP }, 1761 { "exp", IPFY_IPFEXPR }, 1762 { "family", IPFY_FAMILY }, 1763 { "fastroute", IPFY_FROUTE }, 1764 { "first", IPFY_FIRST }, 1765 { "flags", IPFY_FLAGS }, 1766 { "frag", IPFY_FRAG }, 1767 { "frag-body", IPFY_FRAGBODY }, 1768 { "frags", IPFY_FRAGS }, 1769 { "from", IPFY_FROM }, 1770 { "ge", YY_CMP_GE }, 1771 { "group", IPFY_GROUP }, 1772 { "gt", YY_CMP_GT }, 1773 { "head", IPFY_HEAD }, 1774 { "icmp", IPFY_ICMP }, 1775 { "icmp-head", IPFY_ICMPHEAD }, 1776 { "icmp-type", IPFY_ICMPTYPE }, 1777 { "in", IPFY_IN }, 1778 { "in-via", IPFY_INVIA }, 1779 { "inet", IPFY_INET }, 1780 { "inet6", IPFY_INET6 }, 1781 { "ipopt", IPFY_IPOPTS }, 1782 { "ipopts", IPFY_IPOPTS }, 1783 { "keep", IPFY_KEEP }, 1784 { "l5-as", IPFY_L5AS }, 1785 { "le", YY_CMP_LE }, 1786 { "level", IPFY_LEVEL }, 1787 { "limit", IPFY_LIMIT }, 1788 { "log", IPFY_LOG }, 1789 { "loose", IPFY_LOOSE }, 1790 { "lowttl", IPFY_LOWTTL }, 1791 { "lt", YY_CMP_LT }, 1792 { "mask", IPFY_MASK }, 1793 { "match-tag", IPFY_MATCHTAG }, 1794 { "max-per-src", IPFY_MAX_PER_SRC }, 1795 { "max-srcs", IPFY_MAX_SRCS }, 1796 { "mbcast", IPFY_MBCAST }, 1797 { "mcast", IPFY_MULTICAST }, 1798 { "multicast", IPFY_MULTICAST }, 1799 { "nat", IPFY_NAT }, 1800 { "ne", YY_CMP_NE }, 1801 { "net", IPFY_NETWORK }, 1802 { "newisn", IPFY_NEWISN }, 1803 { "no", IPFY_NO }, 1804 { "no-icmp-err", IPFY_NOICMPERR }, 1805 { "nolog", IPFY_NOLOG }, 1806 { "nomatch", IPFY_NOMATCH }, 1807 { "now", IPFY_NOW }, 1808 { "not", IPFY_NOT }, 1809 { "oow", IPFY_OOW }, 1810 { "on", IPFY_ON }, 1811 { "opt", IPFY_OPT }, 1812 { "or-block", IPFY_ORBLOCK }, 1813 { "out", IPFY_OUT }, 1814 { "out-via", IPFY_OUTVIA }, 1815 { "pass", IPFY_PASS }, 1816 { "port", IPFY_PORT }, 1817 { "pps", IPFY_PPS }, 1818 { "preauth", IPFY_PREAUTH }, 1819 { "proto", IPFY_PROTO }, 1820 { "quick", IPFY_QUICK }, 1821 { "reply-to", IPFY_REPLY_TO }, 1822 { "return-icmp", IPFY_RETICMP }, 1823 { "return-icmp-as-dest", IPFY_RETICMPASDST }, 1824 { "return-rst", IPFY_RETRST }, 1825 { "route-to", IPFY_ROUTETO }, 1826 { "rule-ttl", IPFY_RULETTL }, 1827 { "rpc", IPFY_RPC }, 1828 { "sec-class", IPFY_SECCLASS }, 1829 { "set", IPFY_SET }, 1830 { "set-tag", IPFY_SETTAG }, 1831 { "skip", IPFY_SKIP }, 1832 { "short", IPFY_SHORT }, 1833 { "state", IPFY_STATE }, 1834 { "state-age", IPFY_AGE }, 1835 { "strict", IPFY_STRICT }, 1836 { "sync", IPFY_SYNC }, 1837 { "tcp", IPFY_TCP }, 1838 { "tcp-udp", IPFY_TCPUDP }, 1839 { "tos", IPFY_TOS }, 1840 { "to", IPFY_TO }, 1841 { "ttl", IPFY_TTL }, 1842 { "udp", IPFY_UDP }, 1843 { "v6hdr", IPFY_V6HDR }, 1844 { "v6hdrs", IPFY_V6HDRS }, 1845 { "with", IPFY_WITH }, 1846 { NULL, 0 } 1847}; 1848 1849static struct wordtab addrwords[] = { 1850 { "any", IPFY_ANY }, 1851 { "hash", IPFY_HASH }, 1852 { "pool", IPFY_POOL }, 1853 { NULL, 0 } 1854}; 1855 1856static struct wordtab maskwords[] = { 1857 { "broadcast", IPFY_BROADCAST }, 1858 { "netmasked", IPFY_NETMASKED }, 1859 { "network", IPFY_NETWORK }, 1860 { "peer", IPFY_PEER }, 1861 { NULL, 0 } 1862}; 1863 1864static struct wordtab icmpcodewords[] = { 1865 { "cutoff-preced", IPFY_ICMPC_CUTPRE }, 1866 { "filter-prohib", IPFY_ICMPC_FLTPRO }, 1867 { "isolate", IPFY_ICMPC_ISOLATE }, 1868 { "needfrag", IPFY_ICMPC_NEEDF }, 1869 { "net-prohib", IPFY_ICMPC_NETPRO }, 1870 { "net-tos", IPFY_ICMPC_NETTOS }, 1871 { "host-preced", IPFY_ICMPC_HSTPRE }, 1872 { "host-prohib", IPFY_ICMPC_HSTPRO }, 1873 { "host-tos", IPFY_ICMPC_HSTTOS }, 1874 { "host-unk", IPFY_ICMPC_HSTUNK }, 1875 { "host-unr", IPFY_ICMPC_HSTUNR }, 1876 { "net-unk", IPFY_ICMPC_NETUNK }, 1877 { "net-unr", IPFY_ICMPC_NETUNR }, 1878 { "port-unr", IPFY_ICMPC_PORUNR }, 1879 { "proto-unr", IPFY_ICMPC_PROUNR }, 1880 { "srcfail", IPFY_ICMPC_SRCFAIL }, 1881 { NULL, 0 }, 1882}; 1883 1884static struct wordtab ipv4optwords[] = { 1885 { "addext", IPFY_IPOPT_ADDEXT }, 1886 { "cipso", IPFY_IPOPT_CIPSO }, 1887 { "dps", IPFY_IPOPT_DPS }, 1888 { "e-sec", IPFY_IPOPT_ESEC }, 1889 { "eip", IPFY_IPOPT_EIP }, 1890 { "encode", IPFY_IPOPT_ENCODE }, 1891 { "finn", IPFY_IPOPT_FINN }, 1892 { "imitd", IPFY_IPOPT_IMITD }, 1893 { "lsrr", IPFY_IPOPT_LSRR }, 1894 { "mtup", IPFY_IPOPT_MTUP }, 1895 { "mtur", IPFY_IPOPT_MTUR }, 1896 { "nop", IPFY_IPOPT_NOP }, 1897 { "nsapa", IPFY_IPOPT_NSAPA }, 1898 { "rr", IPFY_IPOPT_RR }, 1899 { "rtralrt", IPFY_IPOPT_RTRALRT }, 1900 { "satid", IPFY_IPOPT_SATID }, 1901 { "sdb", IPFY_IPOPT_SDB }, 1902 { "sec", IPFY_IPOPT_SEC }, 1903 { "ssrr", IPFY_IPOPT_SSRR }, 1904 { "tr", IPFY_IPOPT_TR }, 1905 { "ts", IPFY_IPOPT_TS }, 1906 { "ump", IPFY_IPOPT_UMP }, 1907 { "visa", IPFY_IPOPT_VISA }, 1908 { "zsu", IPFY_IPOPT_ZSU }, 1909 { NULL, 0 }, 1910}; 1911 1912static struct wordtab ipv4secwords[] = { 1913 { "confid", IPFY_SEC_CONF }, 1914 { "reserv-1", IPFY_SEC_RSV1 }, 1915 { "reserv-2", IPFY_SEC_RSV2 }, 1916 { "reserv-3", IPFY_SEC_RSV3 }, 1917 { "reserv-4", IPFY_SEC_RSV4 }, 1918 { "secret", IPFY_SEC_SEC }, 1919 { "topsecret", IPFY_SEC_TS }, 1920 { "unclass", IPFY_SEC_UNC }, 1921 { NULL, 0 }, 1922}; 1923 1924static struct wordtab ipv6optwords[] = { 1925 { "dstopts", IPFY_IPV6OPT_DSTOPTS }, 1926 { "esp", IPFY_IPV6OPT_ESP }, 1927 { "frag", IPFY_IPV6OPT_FRAG }, 1928 { "hopopts", IPFY_IPV6OPT_HOPOPTS }, 1929 { "ipv6", IPFY_IPV6OPT_IPV6 }, 1930 { "mobility", IPFY_IPV6OPT_MOBILITY }, 1931 { "none", IPFY_IPV6OPT_NONE }, 1932 { "routing", IPFY_IPV6OPT_ROUTING }, 1933 { NULL, 0 }, 1934}; 1935 1936static struct wordtab logwords[] = { 1937 { "kern", IPFY_FAC_KERN }, 1938 { "user", IPFY_FAC_USER }, 1939 { "mail", IPFY_FAC_MAIL }, 1940 { "daemon", IPFY_FAC_DAEMON }, 1941 { "auth", IPFY_FAC_AUTH }, 1942 { "syslog", IPFY_FAC_SYSLOG }, 1943 { "lpr", IPFY_FAC_LPR }, 1944 { "news", IPFY_FAC_NEWS }, 1945 { "uucp", IPFY_FAC_UUCP }, 1946 { "cron", IPFY_FAC_CRON }, 1947 { "ftp", IPFY_FAC_FTP }, 1948 { "authpriv", IPFY_FAC_AUTHPRIV }, 1949 { "audit", IPFY_FAC_AUDIT }, 1950 { "logalert", IPFY_FAC_LFMT }, 1951 { "console", IPFY_FAC_CONSOLE }, 1952 { "security", IPFY_FAC_SECURITY }, 1953 { "local0", IPFY_FAC_LOCAL0 }, 1954 { "local1", IPFY_FAC_LOCAL1 }, 1955 { "local2", IPFY_FAC_LOCAL2 }, 1956 { "local3", IPFY_FAC_LOCAL3 }, 1957 { "local4", IPFY_FAC_LOCAL4 }, 1958 { "local5", IPFY_FAC_LOCAL5 }, 1959 { "local6", IPFY_FAC_LOCAL6 }, 1960 { "local7", IPFY_FAC_LOCAL7 }, 1961 { "emerg", IPFY_PRI_EMERG }, 1962 { "alert", IPFY_PRI_ALERT }, 1963 { "crit", IPFY_PRI_CRIT }, 1964 { "err", IPFY_PRI_ERR }, 1965 { "warn", IPFY_PRI_WARN }, 1966 { "notice", IPFY_PRI_NOTICE }, 1967 { "info", IPFY_PRI_INFO }, 1968 { "debug", IPFY_PRI_DEBUG }, 1969 { NULL, 0 }, 1970}; 1971 1972 1973 1974 1975int ipf_parsefile(fd, addfunc, iocfuncs, filename) 1976int fd; 1977addfunc_t addfunc; 1978ioctlfunc_t *iocfuncs; 1979char *filename; 1980{ 1981 FILE *fp = NULL; 1982 char *s; 1983 1984 yylineNum = 1; 1985 yysettab(ipfwords); 1986 1987 s = getenv("YYDEBUG"); 1988 if (s != NULL) 1989 yydebug = atoi(s); 1990 else 1991 yydebug = 0; 1992 1993 if (strcmp(filename, "-")) { 1994 fp = fopen(filename, "r"); 1995 if (fp == NULL) { 1996 fprintf(stderr, "fopen(%s) failed: %s\n", filename, 1997 STRERROR(errno)); 1998 return -1; 1999 } 2000 } else 2001 fp = stdin; 2002 2003 while (ipf_parsesome(fd, addfunc, iocfuncs, fp) == 1) 2004 ; 2005 if (fp != NULL) 2006 fclose(fp); 2007 return 0; 2008} 2009 2010 2011int ipf_parsesome(fd, addfunc, iocfuncs, fp) 2012int fd; 2013addfunc_t addfunc; 2014ioctlfunc_t *iocfuncs; 2015FILE *fp; 2016{ 2017 char *s; 2018 int i; 2019 2020 ipffd = fd; 2021 for (i = 0; i <= IPL_LOGMAX; i++) 2022 ipfioctls[i] = iocfuncs[i]; 2023 ipfaddfunc = addfunc; 2024 2025 if (feof(fp)) 2026 return 0; 2027 i = fgetc(fp); 2028 if (i == EOF) 2029 return 0; 2030 if (ungetc(i, fp) == 0) 2031 return 0; 2032 if (feof(fp)) 2033 return 0; 2034 s = getenv("YYDEBUG"); 2035 if (s != NULL) 2036 yydebug = atoi(s); 2037 else 2038 yydebug = 0; 2039 2040 yyin = fp; 2041 yyparse(); 2042 return 1; 2043} 2044 2045 2046static void newrule() 2047{ 2048 frentry_t *frn; 2049 2050 frn = allocfr(); 2051 for (fr = frtop; fr != NULL && fr->fr_next != NULL; fr = fr->fr_next) 2052 ; 2053 if (fr != NULL) { 2054 fr->fr_next = frn; 2055 frn->fr_pnext = &fr->fr_next; 2056 } 2057 if (frtop == NULL) { 2058 frtop = frn; 2059 frn->fr_pnext = &frtop; 2060 } 2061 fr = frn; 2062 frc = frn; 2063 fr->fr_loglevel = 0xffff; 2064 fr->fr_isc = (void *)-1; 2065 fr->fr_logtag = FR_NOLOGTAG; 2066 fr->fr_type = FR_T_NONE; 2067 fr->fr_flineno = yylineNum; 2068 2069 if (use_inet6 == 1) 2070 fr->fr_family = AF_INET6; 2071 else if (use_inet6 == -1) 2072 fr->fr_family = AF_INET; 2073 2074 nrules = 1; 2075} 2076 2077 2078static void setipftype() 2079{ 2080 for (fr = frc; fr != NULL; fr = fr->fr_next) { 2081 if (fr->fr_type == FR_T_NONE) { 2082 fr->fr_type = FR_T_IPF; 2083 fr->fr_data = (void *)calloc(sizeof(fripf_t), 1); 2084 fr->fr_dsize = sizeof(fripf_t); 2085 fr->fr_family = frc->fr_family; 2086 if (fr->fr_family == AF_INET) { 2087 fr->fr_ip.fi_v = 4; 2088 } 2089 else if (fr->fr_family == AF_INET6) { 2090 fr->fr_ip.fi_v = 6; 2091 } 2092 fr->fr_mip.fi_v = 0xf; 2093 fr->fr_ipf->fri_sifpidx = -1; 2094 fr->fr_ipf->fri_difpidx = -1; 2095 } 2096 if (fr->fr_type != FR_T_IPF) { 2097 fprintf(stderr, "IPF Type not set\n"); 2098 } 2099 } 2100} 2101 2102 2103static frentry_t *addrule() 2104{ 2105 frentry_t *f, *f1, *f2; 2106 int count; 2107 2108 for (f2 = frc; f2->fr_next != NULL; f2 = f2->fr_next) 2109 ; 2110 2111 count = nrules; 2112 f = f2; 2113 for (f1 = frc; count > 0; count--, f1 = f1->fr_next) { 2114 f->fr_next = allocfr(); 2115 if (f->fr_next == NULL) 2116 return NULL; 2117 f->fr_next->fr_pnext = &f->fr_next; 2118 added++; 2119 f = f->fr_next; 2120 *f = *f1; 2121 f->fr_next = NULL; 2122 if (f->fr_caddr != NULL) { 2123 f->fr_caddr = malloc(f->fr_dsize); 2124 bcopy(f1->fr_caddr, f->fr_caddr, f->fr_dsize); 2125 } 2126 } 2127 2128 return f2->fr_next; 2129} 2130 2131 2132static int 2133lookuphost(name, addrp) 2134 char *name; 2135 i6addr_t *addrp; 2136{ 2137 int i; 2138 2139 hashed = 0; 2140 pooled = 0; 2141 dynamic = -1; 2142 2143 for (i = 0; i < 4; i++) { 2144 if (fr->fr_ifnames[i] == -1) 2145 continue; 2146 if (strcmp(name, fr->fr_names + fr->fr_ifnames[i]) == 0) { 2147 ifpflag = FRI_DYNAMIC; 2148 dynamic = addname(&fr, name); 2149 return 1; 2150 } 2151 } 2152 2153 if (gethost(AF_INET, name, addrp) == -1) { 2154 fprintf(stderr, "unknown name \"%s\"\n", name); 2155 return -1; 2156 } 2157 return 0; 2158} 2159 2160 2161static void dobpf(v, phrase) 2162int v; 2163char *phrase; 2164{ 2165#ifdef IPFILTER_BPF 2166 struct bpf_program bpf; 2167 struct pcap *p; 2168#endif 2169 fakebpf_t *fb; 2170 u_32_t l; 2171 char *s; 2172 int i; 2173 2174 for (fr = frc; fr != NULL; fr = fr->fr_next) { 2175 if (fr->fr_type != FR_T_NONE) { 2176 fprintf(stderr, "cannot mix IPF and BPF matching\n"); 2177 return; 2178 } 2179 fr->fr_family = vtof(v); 2180 fr->fr_type = FR_T_BPFOPC; 2181 2182 if (!strncmp(phrase, "0x", 2)) { 2183 fb = malloc(sizeof(fakebpf_t)); 2184 2185 for (i = 0, s = strtok(phrase, " \r\n\t"); s != NULL; 2186 s = strtok(NULL, " \r\n\t"), i++) { 2187 fb = realloc(fb, (i / 4 + 1) * sizeof(*fb)); 2188 l = (u_32_t)strtol(s, NULL, 0); 2189 switch (i & 3) 2190 { 2191 case 0 : 2192 fb[i / 4].fb_c = l & 0xffff; 2193 break; 2194 case 1 : 2195 fb[i / 4].fb_t = l & 0xff; 2196 break; 2197 case 2 : 2198 fb[i / 4].fb_f = l & 0xff; 2199 break; 2200 case 3 : 2201 fb[i / 4].fb_k = l; 2202 break; 2203 } 2204 } 2205 if ((i & 3) != 0) { 2206 fprintf(stderr, 2207 "Odd number of bytes in BPF code\n"); 2208 exit(1); 2209 } 2210 i--; 2211 fr->fr_dsize = (i / 4 + 1) * sizeof(*fb); 2212 fr->fr_data = fb; 2213 return; 2214 } 2215 2216#ifdef IPFILTER_BPF 2217 bzero((char *)&bpf, sizeof(bpf)); 2218 p = pcap_open_dead(DLT_RAW, 1); 2219 if (!p) { 2220 fprintf(stderr, "pcap_open_dead failed\n"); 2221 return; 2222 } 2223 2224 if (pcap_compile(p, &bpf, phrase, 1, 0xffffffff)) { 2225 pcap_perror(p, "ipf"); 2226 pcap_close(p); 2227 fprintf(stderr, "pcap parsing failed (%s)\n", phrase); 2228 return; 2229 } 2230 pcap_close(p); 2231 2232 fr->fr_dsize = bpf.bf_len * sizeof(struct bpf_insn); 2233 fr->fr_data = malloc(fr->fr_dsize); 2234 bcopy((char *)bpf.bf_insns, fr->fr_data, fr->fr_dsize); 2235 if (!bpf_validate(fr->fr_data, bpf.bf_len)) { 2236 fprintf(stderr, "BPF validation failed\n"); 2237 return; 2238 } 2239#endif 2240 } 2241 2242#ifdef IPFILTER_BPF 2243 if (opts & OPT_DEBUG) 2244 bpf_dump(&bpf, 0); 2245#else 2246 fprintf(stderr, "BPF filter expressions not supported\n"); 2247 exit(1); 2248#endif 2249} 2250 2251 2252static void resetaddr() 2253{ 2254 hashed = 0; 2255 pooled = 0; 2256 dynamic = -1; 2257} 2258 2259 2260static alist_t *newalist(ptr) 2261alist_t *ptr; 2262{ 2263 alist_t *al; 2264 2265 al = malloc(sizeof(*al)); 2266 if (al == NULL) 2267 return NULL; 2268 al->al_not = 0; 2269 al->al_next = ptr; 2270 return al; 2271} 2272 2273 2274static int 2275makepool(list) 2276 alist_t *list; 2277{ 2278 ip_pool_node_t *n, *top; 2279 ip_pool_t pool; 2280 alist_t *a; 2281 int num; 2282 2283 if (list == NULL) 2284 return 0; 2285 top = calloc(1, sizeof(*top)); 2286 if (top == NULL) 2287 return 0; 2288 2289 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2290 if (use_inet6 == 1) { 2291#ifdef AF_INET6 2292 n->ipn_addr.adf_family = AF_INET6; 2293 n->ipn_addr.adf_addr = a->al_i6addr; 2294 n->ipn_addr.adf_len = offsetof(addrfamily_t, 2295 adf_addr) + 16; 2296 n->ipn_mask.adf_family = AF_INET6; 2297 n->ipn_mask.adf_addr = a->al_i6mask; 2298 n->ipn_mask.adf_len = offsetof(addrfamily_t, 2299 adf_addr) + 16; 2300 2301#endif 2302 } else { 2303 n->ipn_addr.adf_family = AF_INET; 2304 n->ipn_addr.adf_addr.in4.s_addr = a->al_1; 2305 n->ipn_addr.adf_len = offsetof(addrfamily_t, 2306 adf_addr) + 4; 2307 n->ipn_mask.adf_family = AF_INET; 2308 n->ipn_mask.adf_addr.in4.s_addr = a->al_2; 2309 n->ipn_mask.adf_len = offsetof(addrfamily_t, 2310 adf_addr) + 4; 2311 } 2312 n->ipn_info = a->al_not; 2313 if (a->al_next != NULL) { 2314 n->ipn_next = calloc(1, sizeof(*n)); 2315 n = n->ipn_next; 2316 } 2317 } 2318 2319 bzero((char *)&pool, sizeof(pool)); 2320 pool.ipo_unit = IPL_LOGIPF; 2321 pool.ipo_list = top; 2322 num = load_pool(&pool, ipfioctls[IPL_LOGLOOKUP]); 2323 2324 while ((n = top) != NULL) { 2325 top = n->ipn_next; 2326 free(n); 2327 } 2328 return num; 2329} 2330 2331 2332static u_int makehash(list) 2333alist_t *list; 2334{ 2335 iphtent_t *n, *top; 2336 iphtable_t iph; 2337 alist_t *a; 2338 int num; 2339 2340 if (list == NULL) 2341 return 0; 2342 top = calloc(1, sizeof(*top)); 2343 if (top == NULL) 2344 return 0; 2345 2346 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2347 if (a->al_family == AF_INET6) { 2348 n->ipe_family = AF_INET6; 2349 n->ipe_addr = a->al_i6addr; 2350 n->ipe_mask = a->al_i6mask; 2351 } else { 2352 n->ipe_family = AF_INET; 2353 n->ipe_addr.in4_addr = a->al_1; 2354 n->ipe_mask.in4_addr = a->al_2; 2355 } 2356 n->ipe_value = 0; 2357 if (a->al_next != NULL) { 2358 n->ipe_next = calloc(1, sizeof(*n)); 2359 n = n->ipe_next; 2360 } 2361 } 2362 2363 bzero((char *)&iph, sizeof(iph)); 2364 iph.iph_unit = IPL_LOGIPF; 2365 iph.iph_type = IPHASH_LOOKUP; 2366 *iph.iph_name = '\0'; 2367 2368 if (load_hash(&iph, top, ipfioctls[IPL_LOGLOOKUP]) == 0) 2369 sscanf(iph.iph_name, "%u", &num); 2370 else 2371 num = 0; 2372 2373 while ((n = top) != NULL) { 2374 top = n->ipe_next; 2375 free(n); 2376 } 2377 return num; 2378} 2379 2380 2381int ipf_addrule(fd, ioctlfunc, ptr) 2382int fd; 2383ioctlfunc_t ioctlfunc; 2384void *ptr; 2385{ 2386 ioctlcmd_t add, del; 2387 frentry_t *fr; 2388 ipfobj_t obj; 2389 2390 if (ptr == NULL) 2391 return 0; 2392 2393 fr = ptr; 2394 add = 0; 2395 del = 0; 2396 2397 bzero((char *)&obj, sizeof(obj)); 2398 obj.ipfo_rev = IPFILTER_VERSION; 2399 obj.ipfo_size = fr->fr_size; 2400 obj.ipfo_type = IPFOBJ_FRENTRY; 2401 obj.ipfo_ptr = ptr; 2402 2403 if ((opts & OPT_DONOTHING) != 0) 2404 fd = -1; 2405 2406 if (opts & OPT_ZERORULEST) { 2407 add = SIOCZRLST; 2408 } else if (opts & OPT_INACTIVE) { 2409 add = (u_int)fr->fr_hits ? SIOCINIFR : 2410 SIOCADIFR; 2411 del = SIOCRMIFR; 2412 } else { 2413 add = (u_int)fr->fr_hits ? SIOCINAFR : 2414 SIOCADAFR; 2415 del = SIOCRMAFR; 2416 } 2417 2418 if ((opts & OPT_OUTQUE) != 0) 2419 fr->fr_flags |= FR_OUTQUE; 2420 if (fr->fr_hits) 2421 fr->fr_hits--; 2422 if ((opts & OPT_VERBOSE) != 0) 2423 printfr(fr, ioctlfunc); 2424 2425 if ((opts & OPT_DEBUG) != 0) { 2426 binprint(fr, sizeof(*fr)); 2427 if (fr->fr_data != NULL) 2428 binprint(fr->fr_data, fr->fr_dsize); 2429 } 2430 2431 if ((opts & OPT_ZERORULEST) != 0) { 2432 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2433 if ((opts & OPT_DONOTHING) == 0) { 2434 char msg[80]; 2435 2436 sprintf(msg, "%d:ioctl(zero rule)", 2437 fr->fr_flineno); 2438 return ipf_perror_fd(fd, ioctlfunc, msg); 2439 } 2440 } else { 2441#ifdef USE_QUAD_T 2442 printf("hits %qd bytes %qd ", 2443 (long long)fr->fr_hits, 2444 (long long)fr->fr_bytes); 2445#else 2446 printf("hits %ld bytes %ld ", 2447 fr->fr_hits, fr->fr_bytes); 2448#endif 2449 printfr(fr, ioctlfunc); 2450 } 2451 } else if ((opts & OPT_REMOVE) != 0) { 2452 if ((*ioctlfunc)(fd, del, (void *)&obj) == -1) { 2453 if ((opts & OPT_DONOTHING) == 0) { 2454 char msg[80]; 2455 2456 sprintf(msg, "%d:ioctl(delete rule)", 2457 fr->fr_flineno); 2458 return ipf_perror_fd(fd, ioctlfunc, msg); 2459 } 2460 } 2461 } else { 2462 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2463 if ((opts & OPT_DONOTHING) == 0) { 2464 char msg[80]; 2465 2466 sprintf(msg, "%d:ioctl(add/insert rule)", 2467 fr->fr_flineno); 2468 return ipf_perror_fd(fd, ioctlfunc, msg); 2469 } 2470 } 2471 } 2472 return 0; 2473} 2474 2475static void setsyslog() 2476{ 2477 yysetdict(logwords); 2478 yybreakondot = 1; 2479} 2480 2481 2482static void unsetsyslog() 2483{ 2484 yyresetdict(); 2485 yybreakondot = 0; 2486} 2487 2488 2489static void fillgroup(fr) 2490frentry_t *fr; 2491{ 2492 frentry_t *f; 2493 2494 for (f = frold; f != NULL; f = f->fr_next) { 2495 if (f->fr_grhead == -1 && fr->fr_group == -1) 2496 break; 2497 if (f->fr_grhead == -1 || fr->fr_group == -1) 2498 continue; 2499 if (strcmp(f->fr_names + f->fr_grhead, 2500 fr->fr_names + fr->fr_group) == 0) 2501 break; 2502 } 2503 2504 if (f == NULL) 2505 return; 2506 2507 /* 2508 * Only copy down matching fields if the rules are of the same type 2509 * and are of ipf type. The only fields that are copied are those 2510 * that impact the rule parsing itself, eg. need for knowing what the 2511 * protocol should be for rules with port comparisons in them. 2512 */ 2513 if (f->fr_type != fr->fr_type || f->fr_type != FR_T_IPF) 2514 return; 2515 2516 if (fr->fr_family == 0 && f->fr_family != 0) 2517 fr->fr_family = f->fr_family; 2518 2519 if (fr->fr_mproto == 0 && f->fr_mproto != 0) 2520 fr->fr_mproto = f->fr_mproto; 2521 if (fr->fr_proto == 0 && f->fr_proto != 0) 2522 fr->fr_proto = f->fr_proto; 2523 2524 if ((fr->fr_mproto == 0) && ((fr->fr_flx & FI_TCPUDP) == 0) && 2525 ((f->fr_flx & FI_TCPUDP) != 0)) { 2526 fr->fr_flx |= FI_TCPUDP; 2527 fr->fr_mflx |= FI_TCPUDP; 2528 } 2529} 2530 2531 2532static void doipfexpr(line) 2533char *line; 2534{ 2535 int *array; 2536 char *error; 2537 2538 array = parseipfexpr(line, &error); 2539 if (array == NULL) { 2540 fprintf(stderr, "%s:", error); 2541 yyerror("error parsing ipf matching expression"); 2542 return; 2543 } 2544 2545 fr->fr_type = FR_T_IPFEXPR; 2546 fr->fr_data = array; 2547 fr->fr_dsize = array[0] * sizeof(*array); 2548} 2549 2550 2551static void do_tuneint(varname, value) 2552char *varname; 2553int value; 2554{ 2555 char buffer[80]; 2556 2557 strncpy(buffer, varname, 60); 2558 buffer[59] = '\0'; 2559 strcat(buffer, "="); 2560 sprintf(buffer, "%u", value); 2561 ipf_dotuning(ipffd, buffer, ioctl); 2562} 2563 2564 2565static void do_tunestr(varname, value) 2566char *varname, *value; 2567{ 2568 2569 if (!strcasecmp(value, "true")) { 2570 do_tuneint(varname, 1); 2571 } else if (!strcasecmp(value, "false")) { 2572 do_tuneint(varname, 0); 2573 } else { 2574 yyerror("did not find true/false where expected"); 2575 } 2576} 2577 2578 2579static void setifname(frp, idx, name) 2580frentry_t **frp; 2581int idx; 2582char *name; 2583{ 2584 int pos; 2585 2586 pos = addname(frp, name); 2587 if (pos == -1) 2588 return; 2589 (*frp)->fr_ifnames[idx] = pos; 2590} 2591 2592 2593static int addname(frp, name) 2594frentry_t **frp; 2595char *name; 2596{ 2597 frentry_t *f; 2598 int nlen; 2599 int pos; 2600 2601 nlen = strlen(name) + 1; 2602 f = realloc(*frp, (*frp)->fr_size + nlen); 2603 if (*frp == frc) 2604 frc = f; 2605 *frp = f; 2606 if (f == NULL) 2607 return -1; 2608 if (f->fr_pnext != NULL) 2609 *f->fr_pnext = f; 2610 f->fr_size += nlen; 2611 pos = f->fr_namelen; 2612 f->fr_namelen += nlen; 2613 strcpy(f->fr_names + pos, name); 2614 f->fr_names[f->fr_namelen] = '\0'; 2615 return pos; 2616} 2617 2618 2619static frentry_t *allocfr() 2620{ 2621 frentry_t *fr; 2622 2623 fr = calloc(1, sizeof(*fr)); 2624 if (fr != NULL) { 2625 fr->fr_size = sizeof(*fr); 2626 fr->fr_comment = -1; 2627 fr->fr_group = -1; 2628 fr->fr_grhead = -1; 2629 fr->fr_icmphead = -1; 2630 fr->fr_ifnames[0] = -1; 2631 fr->fr_ifnames[1] = -1; 2632 fr->fr_ifnames[2] = -1; 2633 fr->fr_ifnames[3] = -1; 2634 fr->fr_tif.fd_name = -1; 2635 fr->fr_rif.fd_name = -1; 2636 fr->fr_dif.fd_name = -1; 2637 } 2638 return fr; 2639} 2640 2641 2642static void setgroup(frp, name) 2643frentry_t **frp; 2644char *name; 2645{ 2646 int pos; 2647 2648 pos = addname(frp, name); 2649 if (pos == -1) 2650 return; 2651 (*frp)->fr_group = pos; 2652} 2653 2654 2655static void setgrhead(frp, name) 2656frentry_t **frp; 2657char *name; 2658{ 2659 int pos; 2660 2661 pos = addname(frp, name); 2662 if (pos == -1) 2663 return; 2664 (*frp)->fr_grhead = pos; 2665} 2666 2667 2668static void seticmphead(frp, name) 2669frentry_t **frp; 2670char *name; 2671{ 2672 int pos; 2673 2674 pos = addname(frp, name); 2675 if (pos == -1) 2676 return; 2677 (*frp)->fr_icmphead = pos; 2678} 2679 2680 2681static void 2682build_dstaddr_af(fp, ptr) 2683 frentry_t *fp; 2684 void *ptr; 2685{ 2686 struct ipp_s *ipp = ptr; 2687 frentry_t *f = fp; 2688 2689 if (f->fr_family != AF_UNSPEC && ipp->f == AF_UNSPEC) { 2690 ipp->f = f->fr_family; 2691 ipp->v = f->fr_ip.fi_v; 2692 } 2693 if (ipp->f == AF_INET) 2694 ipp->v = 4; 2695 else if (ipp->f == AF_INET6) 2696 ipp->v = 6; 2697 2698 for (; f != NULL; f = f->fr_next) { 2699 f->fr_ip.fi_dst = ipp->a; 2700 f->fr_mip.fi_dst = ipp->m; 2701 f->fr_family = ipp->f; 2702 f->fr_ip.fi_v = ipp->v; 2703 f->fr_mip.fi_v = 0xf; 2704 f->fr_datype = ipp->type; 2705 if (ipp->ifpos != -1) 2706 f->fr_ipf->fri_difpidx = ipp->ifpos; 2707 } 2708 fr = NULL; 2709} 2710 2711 2712static void 2713build_srcaddr_af(fp, ptr) 2714 frentry_t *fp; 2715 void *ptr; 2716{ 2717 struct ipp_s *ipp = ptr; 2718 frentry_t *f = fp; 2719 2720 if (f->fr_family != AF_UNSPEC && ipp->f == AF_UNSPEC) { 2721 ipp->f = f->fr_family; 2722 ipp->v = f->fr_ip.fi_v; 2723 } 2724 if (ipp->f == AF_INET) 2725 ipp->v = 4; 2726 else if (ipp->f == AF_INET6) 2727 ipp->v = 6; 2728 2729 for (; f != NULL; f = f->fr_next) { 2730 f->fr_ip.fi_src = ipp->a; 2731 f->fr_mip.fi_src = ipp->m; 2732 f->fr_family = ipp->f; 2733 f->fr_ip.fi_v = ipp->v; 2734 f->fr_mip.fi_v = 0xf; 2735 f->fr_satype = ipp->type; 2736 f->fr_ipf->fri_sifpidx = ipp->ifpos; 2737 } 2738 fr = NULL; 2739} 2740