1/* $NetBSD: ipf_y.y,v 1.3 2014/06/29 08:53:08 darrenr Exp $ */ 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-bpf.h" 14# define _NET_BPF_H_ 15# include <pcap.h> 16#endif 17#include "netinet/ip_pool.h" 18#include "netinet/ip_htable.h" 19#include "netinet/ipl.h" 20#include "ipf_l.h" 21 22#define YYDEBUG 1 23#define DOALL(x) for (fr = frc; fr != NULL; fr = fr->fr_next) { x } 24#define DOREM(x) for (; fr != NULL; fr = fr->fr_next) { x } 25 26extern void yyerror __P((char *)); 27extern int yyparse __P((void)); 28extern int yylex __P((void)); 29extern int yydebug; 30extern FILE *yyin; 31extern int yylineNum; 32 33static int addname __P((frentry_t **, char *)); 34static frentry_t *addrule __P((void)); 35static frentry_t *allocfr __P((void)); 36static void build_dstaddr_af __P((frentry_t *, void *)); 37static void build_srcaddr_af __P((frentry_t *, void *)); 38static void dobpf __P((int, char *)); 39static void doipfexpr __P((char *)); 40static void do_tuneint __P((char *, int)); 41static void do_tunestr __P((char *, char *)); 42static void fillgroup __P((frentry_t *)); 43static int lookuphost __P((char *, i6addr_t *)); 44static u_int makehash __P((struct alist_s *)); 45static int makepool __P((struct alist_s *)); 46static struct alist_s *newalist __P((struct alist_s *)); 47static void newrule __P((void)); 48static void resetaddr __P((void)); 49static void setgroup __P((frentry_t **, char *)); 50static void setgrhead __P((frentry_t **, char *)); 51static void seticmphead __P((frentry_t **, char *)); 52static void setifname __P((frentry_t **, int, char *)); 53static void setipftype __P((void)); 54static void setsyslog __P((void)); 55static void unsetsyslog __P((void)); 56 57frentry_t *fr = NULL, *frc = NULL, *frtop = NULL, *frold = NULL; 58 59static int ifpflag = 0; 60static int nowith = 0; 61static int dynamic = -1; 62static int pooled = 0; 63static int hashed = 0; 64static int nrules = 0; 65static int newlist = 0; 66static int added = 0; 67static int ipffd = -1; 68static int *yycont = NULL; 69static ioctlfunc_t ipfioctls[IPL_LOGSIZE]; 70static addfunc_t ipfaddfunc = NULL; 71 72%} 73%union { 74 char *str; 75 u_32_t num; 76 frentry_t fr; 77 frtuc_t *frt; 78 struct alist_s *alist; 79 u_short port; 80 struct in_addr ip4; 81 struct { 82 u_short p1; 83 u_short p2; 84 int pc; 85 } pc; 86 struct ipp_s { 87 int type; 88 int ifpos; 89 int f; 90 int v; 91 int lif; 92 union i6addr a; 93 union i6addr m; 94 char *name; 95 } ipp; 96 struct { 97 i6addr_t adr; 98 int f; 99 } adr; 100 i6addr_t ip6; 101 struct { 102 char *if1; 103 char *if2; 104 } ifs; 105 char gname[FR_GROUPLEN]; 106}; 107 108%type <port> portnum 109%type <num> facility priority icmpcode seclevel secname icmptype 110%type <num> opt compare range opttype flagset optlist ipv6hdrlist ipv6hdr 111%type <num> portc porteq ipmask maskopts 112%type <ip4> ipv4 ipv4_16 ipv4_24 113%type <adr> hostname 114%type <ipp> addr ipaddr 115%type <str> servicename name interfacename groupname 116%type <pc> portrange portcomp 117%type <alist> addrlist poollist 118%type <ifs> onname 119 120%token <num> YY_NUMBER YY_HEX 121%token <str> YY_STR 122%token YY_COMMENT 123%token YY_CMP_EQ YY_CMP_NE YY_CMP_LE YY_CMP_GE YY_CMP_LT YY_CMP_GT 124%token YY_RANGE_OUT YY_RANGE_IN 125%token <ip6> YY_IPV6 126 127%token IPFY_SET 128%token IPFY_PASS IPFY_BLOCK IPFY_COUNT IPFY_CALL IPFY_NOMATCH 129%token IPFY_RETICMP IPFY_RETRST IPFY_RETICMPASDST 130%token IPFY_IN IPFY_OUT 131%token IPFY_QUICK IPFY_ON IPFY_OUTVIA IPFY_INVIA 132%token IPFY_DUPTO IPFY_TO IPFY_FROUTE IPFY_REPLY_TO IPFY_ROUTETO 133%token IPFY_TOS IPFY_TTL IPFY_PROTO IPFY_INET IPFY_INET6 134%token IPFY_HEAD IPFY_GROUP 135%token IPFY_AUTH IPFY_PREAUTH 136%token IPFY_LOG IPFY_BODY IPFY_FIRST IPFY_LEVEL IPFY_ORBLOCK IPFY_L5AS 137%token IPFY_LOGTAG IPFY_MATCHTAG IPFY_SETTAG IPFY_SKIP IPFY_DECAPS 138%token IPFY_FROM IPFY_ALL IPFY_ANY IPFY_BPFV4 IPFY_BPFV6 IPFY_POOL IPFY_HASH 139%token IPFY_IPFEXPR IPFY_PPS IPFY_FAMILY IPFY_DSTLIST 140%token IPFY_ESP IPFY_AH 141%token IPFY_WITH IPFY_AND IPFY_NOT IPFY_NO IPFY_OPT 142%token IPFY_TCPUDP IPFY_TCP IPFY_UDP 143%token IPFY_FLAGS IPFY_MULTICAST 144%token IPFY_MASK IPFY_BROADCAST IPFY_NETWORK IPFY_NETMASKED IPFY_PEER 145%token IPFY_RPC IPFY_PORT 146%token IPFY_NOW IPFY_COMMENT IPFY_RULETTL 147%token IPFY_ICMP IPFY_ICMPTYPE IPFY_ICMPCODE 148%token IPFY_IPOPTS IPFY_SHORT IPFY_NAT IPFY_BADSRC IPFY_LOWTTL IPFY_FRAG 149%token IPFY_MBCAST IPFY_BAD IPFY_BADNAT IPFY_OOW IPFY_NEWISN IPFY_NOICMPERR 150%token IPFY_KEEP IPFY_STATE IPFY_FRAGS IPFY_LIMIT IPFY_STRICT IPFY_AGE 151%token IPFY_SYNC IPFY_FRAGBODY IPFY_ICMPHEAD IPFY_NOLOG IPFY_LOOSE 152%token IPFY_MAX_SRCS IPFY_MAX_PER_SRC 153%token IPFY_IPOPT_NOP IPFY_IPOPT_RR IPFY_IPOPT_ZSU IPFY_IPOPT_MTUP 154%token IPFY_IPOPT_MTUR IPFY_IPOPT_ENCODE IPFY_IPOPT_TS IPFY_IPOPT_TR 155%token IPFY_IPOPT_SEC IPFY_IPOPT_LSRR IPFY_IPOPT_ESEC IPFY_IPOPT_CIPSO 156%token IPFY_IPOPT_SATID IPFY_IPOPT_SSRR IPFY_IPOPT_ADDEXT IPFY_IPOPT_VISA 157%token IPFY_IPOPT_IMITD IPFY_IPOPT_EIP IPFY_IPOPT_FINN IPFY_IPOPT_DPS 158%token IPFY_IPOPT_SDB IPFY_IPOPT_NSAPA IPFY_IPOPT_RTRALRT IPFY_IPOPT_UMP 159%token IPFY_SECCLASS IPFY_SEC_UNC IPFY_SEC_CONF IPFY_SEC_RSV1 IPFY_SEC_RSV2 160%token IPFY_SEC_RSV4 IPFY_SEC_SEC IPFY_SEC_TS IPFY_SEC_RSV3 IPFY_DOI 161 162%token IPFY_V6HDRS IPFY_IPV6OPT IPFY_IPV6OPT_DSTOPTS IPFY_IPV6OPT_HOPOPTS 163%token IPFY_IPV6OPT_IPV6 IPFY_IPV6OPT_NONE IPFY_IPV6OPT_ROUTING IPFY_V6HDR 164%token IPFY_IPV6OPT_MOBILITY IPFY_IPV6OPT_ESP IPFY_IPV6OPT_FRAG 165 166%token IPFY_ICMPT_UNR IPFY_ICMPT_ECHO IPFY_ICMPT_ECHOR IPFY_ICMPT_SQUENCH 167%token IPFY_ICMPT_REDIR IPFY_ICMPT_TIMEX IPFY_ICMPT_PARAMP IPFY_ICMPT_TIMEST 168%token IPFY_ICMPT_TIMESTREP IPFY_ICMPT_INFOREQ IPFY_ICMPT_INFOREP 169%token IPFY_ICMPT_MASKREQ IPFY_ICMPT_MASKREP IPFY_ICMPT_ROUTERAD 170%token IPFY_ICMPT_ROUTERSOL 171 172%token IPFY_ICMPC_NETUNR IPFY_ICMPC_HSTUNR IPFY_ICMPC_PROUNR IPFY_ICMPC_PORUNR 173%token IPFY_ICMPC_NEEDF IPFY_ICMPC_SRCFAIL IPFY_ICMPC_NETUNK IPFY_ICMPC_HSTUNK 174%token IPFY_ICMPC_ISOLATE IPFY_ICMPC_NETPRO IPFY_ICMPC_HSTPRO 175%token IPFY_ICMPC_NETTOS IPFY_ICMPC_HSTTOS IPFY_ICMPC_FLTPRO IPFY_ICMPC_HSTPRE 176%token IPFY_ICMPC_CUTPRE 177 178%token IPFY_FAC_KERN IPFY_FAC_USER IPFY_FAC_MAIL IPFY_FAC_DAEMON IPFY_FAC_AUTH 179%token IPFY_FAC_SYSLOG IPFY_FAC_LPR IPFY_FAC_NEWS IPFY_FAC_UUCP IPFY_FAC_CRON 180%token IPFY_FAC_LOCAL0 IPFY_FAC_LOCAL1 IPFY_FAC_LOCAL2 IPFY_FAC_LOCAL3 181%token IPFY_FAC_LOCAL4 IPFY_FAC_LOCAL5 IPFY_FAC_LOCAL6 IPFY_FAC_LOCAL7 182%token IPFY_FAC_SECURITY IPFY_FAC_FTP IPFY_FAC_AUTHPRIV IPFY_FAC_AUDIT 183%token IPFY_FAC_LFMT IPFY_FAC_CONSOLE 184 185%token IPFY_PRI_EMERG IPFY_PRI_ALERT IPFY_PRI_CRIT IPFY_PRI_ERR IPFY_PRI_WARN 186%token IPFY_PRI_NOTICE IPFY_PRI_INFO IPFY_PRI_DEBUG 187%% 188file: settings rules 189 | rules 190 ; 191 192settings: 193 YY_COMMENT 194 | setting 195 | settings setting 196 ; 197 198rules: line 199 | assign 200 | rules line 201 | rules assign 202 ; 203 204setting: 205 IPFY_SET YY_STR YY_NUMBER ';' { do_tuneint($2, $3); } 206 | IPFY_SET YY_STR YY_HEX ';' { do_tuneint($2, $3); } 207 | IPFY_SET YY_STR YY_STR ';' { do_tunestr($2, $3); } 208 ; 209 210line: rule { while ((fr = frtop) != NULL) { 211 frtop = fr->fr_next; 212 fr->fr_next = NULL; 213 if ((fr->fr_type == FR_T_IPF) && 214 (fr->fr_ip.fi_v == 0)) 215 fr->fr_mip.fi_v = 0; 216 /* XXX validate ? */ 217 (*ipfaddfunc)(ipffd, ipfioctls[IPL_LOGIPF], fr); 218 fr->fr_next = frold; 219 frold = fr; 220 } 221 resetlexer(); 222 } 223 | YY_COMMENT 224 ; 225 226xx: { newrule(); } 227 ; 228 229assign: YY_STR assigning YY_STR ';' { set_variable($1, $3); 230 resetlexer(); 231 free($1); 232 free($3); 233 yyvarnext = 0; 234 } 235 ; 236 237assigning: 238 '=' { yyvarnext = 1; } 239 ; 240 241rule: inrule eol 242 | outrule eol 243 ; 244 245eol: | ';' 246 ; 247 248inrule: 249 rulehead markin inopts rulemain ruletail intag ruletail2 250 ; 251 252outrule: 253 rulehead markout outopts rulemain ruletail outtag ruletail2 254 ; 255 256rulehead: 257 xx collection action 258 | xx insert collection action 259 ; 260 261markin: IPFY_IN { fr->fr_flags |= FR_INQUE; } 262 ; 263 264markout: 265 IPFY_OUT { fr->fr_flags |= FR_OUTQUE; } 266 ; 267 268rulemain: 269 ipfrule 270 | bpfrule 271 | exprrule 272 ; 273 274ipfrule: 275 family tos ttl proto ip 276 ; 277 278family: | IPFY_FAMILY IPFY_INET { if (use_inet6 == 1) { 279 YYERROR; 280 } else { 281 frc->fr_family = AF_INET; 282 } 283 } 284 | IPFY_INET { if (use_inet6 == 1) { 285 YYERROR; 286 } else { 287 frc->fr_family = AF_INET; 288 } 289 } 290 | IPFY_FAMILY IPFY_INET6 { if (use_inet6 == -1) { 291 YYERROR; 292 } else { 293 frc->fr_family = AF_INET6; 294 } 295 } 296 | IPFY_INET6 { if (use_inet6 == -1) { 297 YYERROR; 298 } else { 299 frc->fr_family = AF_INET6; 300 } 301 } 302 ; 303 304bpfrule: 305 IPFY_BPFV4 '{' YY_STR '}' { dobpf(4, $3); free($3); } 306 | IPFY_BPFV6 '{' YY_STR '}' { dobpf(6, $3); free($3); } 307 ; 308 309exprrule: 310 IPFY_IPFEXPR '{' YY_STR '}' { doipfexpr($3); } 311 ; 312 313ruletail: 314 with keep head group 315 ; 316 317ruletail2: 318 pps age new rulettl comment 319 ; 320 321intag: settagin matchtagin 322 ; 323 324outtag: settagout matchtagout 325 ; 326 327insert: 328 '@' YY_NUMBER { fr->fr_hits = (U_QUAD_T)$2 + 1; } 329 ; 330 331collection: 332 | YY_NUMBER { fr->fr_collect = $1; } 333 ; 334 335action: block 336 | IPFY_PASS { fr->fr_flags |= FR_PASS; } 337 | IPFY_NOMATCH { fr->fr_flags |= FR_NOMATCH; } 338 | log 339 | IPFY_COUNT { fr->fr_flags |= FR_ACCOUNT; } 340 | decaps { fr->fr_flags |= FR_DECAPSULATE; } 341 | auth 342 | IPFY_SKIP YY_NUMBER { fr->fr_flags |= FR_SKIP; 343 fr->fr_arg = $2; } 344 | IPFY_CALL func 345 | IPFY_CALL IPFY_NOW func { fr->fr_flags |= FR_CALLNOW; } 346 ; 347 348block: blocked 349 | blocked blockreturn 350 ; 351 352blocked: 353 IPFY_BLOCK { fr->fr_flags = FR_BLOCK; } 354 ; 355blockreturn: 356 IPFY_RETICMP { fr->fr_flags |= FR_RETICMP; } 357 | IPFY_RETICMP returncode { fr->fr_flags |= FR_RETICMP; } 358 | IPFY_RETICMPASDST { fr->fr_flags |= FR_FAKEICMP; } 359 | IPFY_RETICMPASDST returncode { fr->fr_flags |= FR_FAKEICMP; } 360 | IPFY_RETRST { fr->fr_flags |= FR_RETRST; } 361 ; 362 363decaps: IPFY_DECAPS 364 | IPFY_DECAPS IPFY_L5AS '(' YY_STR ')' 365 { fr->fr_icode = atoi($4); } 366 ; 367 368log: IPFY_LOG { fr->fr_flags |= FR_LOG; } 369 | IPFY_LOG logoptions { fr->fr_flags |= FR_LOG; } 370 ; 371 372auth: IPFY_AUTH { fr->fr_flags |= FR_AUTH; } 373 | IPFY_AUTH blockreturn { fr->fr_flags |= FR_AUTH;} 374 | IPFY_PREAUTH { fr->fr_flags |= FR_PREAUTH; } 375 ; 376 377func: YY_STR '/' YY_NUMBER 378 { fr->fr_func = nametokva($1, ipfioctls[IPL_LOGIPF]); 379 fr->fr_arg = $3; 380 free($1); 381 } 382 ; 383 384inopts: 385 | inopts inopt 386 ; 387 388inopt: 389 logopt 390 | quick 391 | on 392 | dup 393 | froute 394 | proute 395 | replyto 396 ; 397 398outopts: 399 | outopts outopt 400 ; 401 402outopt: 403 logopt 404 | quick 405 | on 406 | dup 407 | proute 408 | froute 409 | replyto 410 ; 411 412tos: | settos YY_NUMBER { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 413 | settos YY_HEX { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 414 | settos lstart toslist lend 415 ; 416 417settos: IPFY_TOS { setipftype(); } 418 ; 419 420toslist: 421 YY_NUMBER { DOALL(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 422 | YY_HEX { DOREM(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 423 | toslist lmore YY_NUMBER 424 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 425 | toslist lmore YY_HEX 426 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 427 ; 428 429ttl: | setttl YY_NUMBER 430 { DOALL(fr->fr_ttl = $2; fr->fr_mttl = 0xff;) } 431 | setttl lstart ttllist lend 432 ; 433 434lstart: '{' { newlist = 1; fr = frc; added = 0; } 435 ; 436 437lend: '}' { nrules += added; } 438 ; 439 440lmore: lanother { if (newlist == 1) { 441 newlist = 0; 442 } 443 fr = addrule(); 444 if (yycont != NULL) 445 *yycont = 1; 446 } 447 ; 448 449lanother: 450 | ',' 451 ; 452 453setttl: IPFY_TTL { setipftype(); } 454 ; 455 456ttllist: 457 YY_NUMBER { DOREM(fr->fr_ttl = $1; fr->fr_mttl = 0xff;) } 458 | ttllist lmore YY_NUMBER 459 { DOREM(fr->fr_ttl = $3; fr->fr_mttl = 0xff;) } 460 ; 461 462proto: | protox protocol { yyresetdict(); } 463 ; 464 465protox: IPFY_PROTO { setipftype(); 466 fr = frc; 467 yysetdict(NULL); } 468 ; 469 470ip: srcdst flags icmp 471 ; 472 473group: | IPFY_GROUP groupname { DOALL(setgroup(&fr, $2); \ 474 fillgroup(fr);); 475 free($2); 476 } 477 ; 478 479head: | IPFY_HEAD groupname { DOALL(setgrhead(&fr, $2);); 480 free($2); 481 } 482 ; 483 484groupname: 485 YY_STR { $$ = $1; 486 if (strlen($$) >= FR_GROUPLEN) 487 $$[FR_GROUPLEN - 1] = '\0'; 488 } 489 | YY_NUMBER { $$ = malloc(16); 490 sprintf($$, "%d", $1); 491 } 492 ; 493 494settagin: 495 | IPFY_SETTAG '(' taginlist ')' 496 ; 497 498taginlist: 499 taginspec 500 | taginlist ',' taginspec 501 ; 502 503taginspec: 504 logtag 505 ; 506 507nattag: IPFY_NAT '=' YY_STR { DOALL(strncpy(fr->fr_nattag.ipt_tag,\ 508 $3, IPFTAG_LEN);); 509 free($3); } 510 | IPFY_NAT '=' YY_NUMBER { DOALL(sprintf(fr->fr_nattag.ipt_tag,\ 511 "%d", $3 & 0xffffffff);) } 512 ; 513 514logtag: IPFY_LOG '=' YY_NUMBER { DOALL(fr->fr_logtag = $3;) } 515 ; 516 517settagout: 518 | IPFY_SETTAG '(' tagoutlist ')' 519 ; 520 521tagoutlist: 522 tagoutspec 523 | tagoutlist ',' tagoutspec 524 ; 525 526tagoutspec: 527 logtag 528 | nattag 529 ; 530 531matchtagin: 532 | IPFY_MATCHTAG '(' tagoutlist ')' 533 ; 534 535matchtagout: 536 | IPFY_MATCHTAG '(' taginlist ')' 537 ; 538 539pps: | IPFY_PPS YY_NUMBER { DOALL(fr->fr_pps = $2;) } 540 ; 541 542new: | savegroup file restoregroup 543 ; 544 545rulettl: 546 | IPFY_RULETTL YY_NUMBER { DOALL(fr->fr_die = $2;) } 547 ; 548 549comment: 550 | IPFY_COMMENT YY_STR { DOALL(fr->fr_comment = addname(&fr, \ 551 $2);) } 552 ; 553 554savegroup: 555 '{' 556 ; 557 558restoregroup: 559 '}' 560 ; 561 562logopt: log 563 ; 564 565quick: IPFY_QUICK { fr->fr_flags |= FR_QUICK; } 566 ; 567 568on: IPFY_ON onname { setifname(&fr, 0, $2.if1); 569 free($2.if1); 570 if ($2.if2 != NULL) { 571 setifname(&fr, 1, 572 $2.if2); 573 free($2.if2); 574 } 575 } 576 | IPFY_ON lstart onlist lend 577 | IPFY_ON onname IPFY_INVIA vianame { setifname(&fr, 0, $2.if1); 578 free($2.if1); 579 if ($2.if2 != NULL) { 580 setifname(&fr, 1, 581 $2.if2); 582 free($2.if2); 583 } 584 } 585 | IPFY_ON onname IPFY_OUTVIA vianame { setifname(&fr, 0, $2.if1); 586 free($2.if1); 587 if ($2.if2 != NULL) { 588 setifname(&fr, 1, 589 $2.if2); 590 free($2.if2); 591 } 592 } 593 ; 594 595onlist: onname { DOREM(setifname(&fr, 0, $1.if1); \ 596 if ($1.if2 != NULL) \ 597 setifname(&fr, 1, $1.if2); \ 598 ) 599 free($1.if1); 600 if ($1.if2 != NULL) 601 free($1.if2); 602 } 603 | onlist lmore onname { DOREM(setifname(&fr, 0, $3.if1); \ 604 if ($3.if2 != NULL) \ 605 setifname(&fr, 1, $3.if2); \ 606 ) 607 free($3.if1); 608 if ($3.if2 != NULL) 609 free($3.if2); 610 } 611 ; 612 613onname: interfacename { $$.if1 = $1; 614 $$.if2 = NULL; 615 } 616 | interfacename ',' interfacename 617 { $$.if1 = $1; 618 $$.if2 = $3; 619 } 620 ; 621 622vianame: 623 name { setifname(&fr, 2, $1); 624 free($1); 625 } 626 | name ',' name { setifname(&fr, 2, $1); 627 free($1); 628 setifname(&fr, 3, $3); 629 free($3); 630 } 631 ; 632 633dup: IPFY_DUPTO name 634 { int idx = addname(&fr, $2); 635 fr->fr_dif.fd_name = idx; 636 free($2); 637 } 638 | IPFY_DUPTO IPFY_DSTLIST '/' name 639 { int idx = addname(&fr, $4); 640 fr->fr_dif.fd_name = idx; 641 fr->fr_dif.fd_type = FRD_DSTLIST; 642 free($4); 643 } 644 | IPFY_DUPTO name duptoseparator hostname 645 { int idx = addname(&fr, $2); 646 fr->fr_dif.fd_name = idx; 647 fr->fr_dif.fd_ptr = (void *)-1; 648 fr->fr_dif.fd_ip6 = $4.adr; 649 if (fr->fr_family == AF_UNSPEC && $4.f != AF_UNSPEC) 650 fr->fr_family = $4.f; 651 yyexpectaddr = 0; 652 free($2); 653 } 654 ; 655 656duptoseparator: 657 ':' { yyexpectaddr = 1; yycont = &yyexpectaddr; resetaddr(); } 658 ; 659 660froute: IPFY_FROUTE { fr->fr_flags |= FR_FASTROUTE; } 661 ; 662 663proute: routeto name 664 { int idx = addname(&fr, $2); 665 fr->fr_tif.fd_name = idx; 666 free($2); 667 } 668 | routeto IPFY_DSTLIST '/' name 669 { int idx = addname(&fr, $4); 670 fr->fr_tif.fd_name = idx; 671 fr->fr_tif.fd_type = FRD_DSTLIST; 672 free($4); 673 } 674 | routeto name duptoseparator hostname 675 { int idx = addname(&fr, $2); 676 fr->fr_tif.fd_name = idx; 677 fr->fr_tif.fd_ptr = (void *)-1; 678 fr->fr_tif.fd_ip6 = $4.adr; 679 if (fr->fr_family == AF_UNSPEC && $4.f != AF_UNSPEC) 680 fr->fr_family = $4.f; 681 yyexpectaddr = 0; 682 free($2); 683 } 684 ; 685 686routeto: 687 IPFY_TO 688 | IPFY_ROUTETO 689 ; 690 691replyto: 692 IPFY_REPLY_TO name 693 { int idx = addname(&fr, $2); 694 fr->fr_rif.fd_name = idx; 695 free($2); 696 } 697 | IPFY_REPLY_TO IPFY_DSTLIST '/' name 698 { fr->fr_rif.fd_name = addname(&fr, $4); 699 fr->fr_rif.fd_type = FRD_DSTLIST; 700 free($4); 701 } 702 | IPFY_REPLY_TO name duptoseparator hostname 703 { int idx = addname(&fr, $2); 704 fr->fr_rif.fd_name = idx; 705 fr->fr_rif.fd_ptr = (void *)-1; 706 fr->fr_rif.fd_ip6 = $4.adr; 707 if (fr->fr_family == AF_UNSPEC && $4.f != AF_UNSPEC) 708 fr->fr_family = $4.f; 709 free($2); 710 } 711 ; 712 713logoptions: 714 logoption 715 | logoptions logoption 716 ; 717 718logoption: 719 IPFY_BODY { fr->fr_flags |= FR_LOGBODY; } 720 | IPFY_FIRST { fr->fr_flags |= FR_LOGFIRST; } 721 | IPFY_ORBLOCK { fr->fr_flags |= FR_LOGORBLOCK; } 722 | level loglevel { unsetsyslog(); } 723 ; 724 725returncode: 726 starticmpcode icmpcode ')' { fr->fr_icode = $2; yyresetdict(); } 727 ; 728 729starticmpcode: 730 '(' { yysetdict(icmpcodewords); } 731 ; 732 733srcdst: | IPFY_ALL 734 | fromto 735 ; 736 737protocol: 738 YY_NUMBER { DOALL(fr->fr_proto = $1; \ 739 fr->fr_mproto = 0xff;) 740 } 741 | YY_STR { if (!strcmp($1, "tcp-udp")) { 742 DOALL(fr->fr_flx |= FI_TCPUDP; \ 743 fr->fr_mflx |= FI_TCPUDP;) 744 } else { 745 int p = getproto($1); 746 if (p == -1) 747 yyerror("protocol unknown"); 748 DOALL(fr->fr_proto = p; \ 749 fr->fr_mproto = 0xff;) 750 } 751 free($1); 752 } 753 | YY_STR nextstring YY_STR 754 { if (!strcmp($1, "tcp") && 755 !strcmp($3, "udp")) { 756 DOREM(fr->fr_flx |= FI_TCPUDP; \ 757 fr->fr_mflx |= FI_TCPUDP;) 758 } else { 759 YYERROR; 760 } 761 free($1); 762 free($3); 763 } 764 ; 765 766nextstring: 767 '/' { yysetdict(NULL); } 768 ; 769 770fromto: from srcobject to dstobject { yyexpectaddr = 0; yycont = NULL; } 771 | to dstobject { yyexpectaddr = 0; yycont = NULL; } 772 | from srcobject { yyexpectaddr = 0; yycont = NULL; } 773 ; 774 775from: IPFY_FROM { setipftype(); 776 if (fr == NULL) 777 fr = frc; 778 yyexpectaddr = 1; 779 if (yydebug) 780 printf("set yyexpectaddr\n"); 781 yycont = &yyexpectaddr; 782 yysetdict(addrwords); 783 resetaddr(); } 784 ; 785 786to: IPFY_TO { if (fr == NULL) 787 fr = frc; 788 yyexpectaddr = 1; 789 if (yydebug) 790 printf("set yyexpectaddr\n"); 791 yycont = &yyexpectaddr; 792 yysetdict(addrwords); 793 resetaddr(); 794 } 795 ; 796 797with: | andwith withlist 798 ; 799 800andwith: 801 IPFY_WITH { nowith = 0; setipftype(); } 802 | IPFY_AND { nowith = 0; setipftype(); } 803 ; 804 805flags: | startflags flagset 806 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 807 | startflags flagset '/' flagset 808 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 809 | startflags '/' flagset 810 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 811 | startflags YY_NUMBER 812 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 813 | startflags '/' YY_NUMBER 814 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 815 | startflags YY_NUMBER '/' YY_NUMBER 816 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 817 | startflags flagset '/' YY_NUMBER 818 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 819 | startflags YY_NUMBER '/' flagset 820 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 821 ; 822 823startflags: 824 IPFY_FLAGS { if (frc->fr_type != FR_T_IPF) 825 yyerror("flags with non-ipf type rule"); 826 if (frc->fr_proto != IPPROTO_TCP) 827 yyerror("flags with non-TCP rule"); 828 } 829 ; 830 831flagset: 832 YY_STR { $$ = tcpflags($1); free($1); } 833 | YY_HEX { $$ = $1; } 834 ; 835 836srcobject: 837 { yyresetdict(); } fromport 838 | srcaddr srcport 839 | '!' srcaddr srcport 840 { DOALL(fr->fr_flags |= FR_NOTSRCIP;) } 841 ; 842 843srcaddr: 844 addr { build_srcaddr_af(fr, &$1); } 845 | lstart srcaddrlist lend 846 ; 847 848srcaddrlist: 849 addr { build_srcaddr_af(fr, &$1); } 850 | srcaddrlist lmore addr 851 { build_srcaddr_af(fr, &$3); } 852 ; 853 854srcport: 855 | portcomp 856 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 857 | portrange 858 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 859 fr->fr_stop = $1.p2;) } 860 | porteq lstart srcportlist lend 861 { yyresetdict(); } 862 ; 863 864fromport: 865 portcomp 866 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 867 | portrange 868 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 869 fr->fr_stop = $1.p2;) } 870 | porteq lstart srcportlist lend 871 { yyresetdict(); } 872 ; 873 874srcportlist: 875 portnum { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $1;) } 876 | portnum ':' portnum 877 { DOREM(fr->fr_scmp = FR_INCRANGE; fr->fr_sport = $1; \ 878 fr->fr_stop = $3;) } 879 | portnum YY_RANGE_IN portnum 880 { DOREM(fr->fr_scmp = FR_INRANGE; fr->fr_sport = $1; \ 881 fr->fr_stop = $3;) } 882 | srcportlist lmore portnum 883 { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $3;) } 884 | srcportlist lmore portnum ':' portnum 885 { DOREM(fr->fr_scmp = FR_INCRANGE; fr->fr_sport = $3; \ 886 fr->fr_stop = $5;) } 887 | srcportlist lmore portnum YY_RANGE_IN portnum 888 { DOREM(fr->fr_scmp = FR_INRANGE; fr->fr_sport = $3; \ 889 fr->fr_stop = $5;) } 890 ; 891 892dstobject: 893 { yyresetdict(); } toport 894 | dstaddr dstport 895 | '!' dstaddr dstport 896 { DOALL(fr->fr_flags |= FR_NOTDSTIP;) } 897 ; 898 899dstaddr: 900 addr { if (($1.f != AF_UNSPEC) && (frc->fr_family != AF_UNSPEC) && 901 ($1.f != frc->fr_family)) 902 yyerror("1.src/dst address family mismatch"); 903 build_dstaddr_af(fr, &$1); 904 } 905 | lstart dstaddrlist lend 906 ; 907 908dstaddrlist: 909 addr { if (($1.f != AF_UNSPEC) && (frc->fr_family != AF_UNSPEC) && 910 ($1.f != frc->fr_family)) 911 yyerror("2.src/dst address family mismatch"); 912 build_dstaddr_af(fr, &$1); 913 } 914 | dstaddrlist lmore addr 915 { if (($3.f != AF_UNSPEC) && (frc->fr_family != AF_UNSPEC) && 916 ($3.f != frc->fr_family)) 917 yyerror("3.src/dst address family mismatch"); 918 build_dstaddr_af(fr, &$3); 919 } 920 ; 921 922 923dstport: 924 | portcomp 925 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 926 | portrange 927 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 928 fr->fr_dtop = $1.p2;) } 929 | porteq lstart dstportlist lend 930 { yyresetdict(); } 931 ; 932 933toport: 934 portcomp 935 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 936 | portrange 937 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 938 fr->fr_dtop = $1.p2;) } 939 | porteq lstart dstportlist lend 940 { yyresetdict(); } 941 ; 942 943dstportlist: 944 portnum { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $1;) } 945 | portnum ':' portnum 946 { DOREM(fr->fr_dcmp = FR_INCRANGE; fr->fr_dport = $1; \ 947 fr->fr_dtop = $3;) } 948 | portnum YY_RANGE_IN portnum 949 { DOREM(fr->fr_dcmp = FR_INRANGE; fr->fr_dport = $1; \ 950 fr->fr_dtop = $3;) } 951 | dstportlist lmore portnum 952 { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $3;) } 953 | dstportlist lmore portnum ':' portnum 954 { DOREM(fr->fr_dcmp = FR_INCRANGE; fr->fr_dport = $3; \ 955 fr->fr_dtop = $5;) } 956 | dstportlist lmore portnum YY_RANGE_IN portnum 957 { DOREM(fr->fr_dcmp = FR_INRANGE; fr->fr_dport = $3; \ 958 fr->fr_dtop = $5;) } 959 ; 960 961addr: pool '/' YY_NUMBER { pooled = 1; 962 yyexpectaddr = 0; 963 $$.type = FRI_LOOKUP; 964 $$.v = 0; 965 $$.ifpos = -1; 966 $$.f = AF_UNSPEC; 967 $$.a.iplookuptype = IPLT_POOL; 968 $$.a.iplookupsubtype = 0; 969 $$.a.iplookupnum = $3; } 970 | pool '/' YY_STR { pooled = 1; 971 $$.ifpos = -1; 972 $$.f = AF_UNSPEC; 973 $$.type = FRI_LOOKUP; 974 $$.a.iplookuptype = IPLT_POOL; 975 $$.a.iplookupsubtype = 1; 976 $$.a.iplookupname = addname(&fr, $3); 977 } 978 | pool '=' '(' { yyexpectaddr = 1; 979 pooled = 1; 980 } 981 poollist ')' { yyexpectaddr = 0; 982 $$.v = 0; 983 $$.ifpos = -1; 984 $$.f = AF_UNSPEC; 985 $$.type = FRI_LOOKUP; 986 $$.a.iplookuptype = IPLT_POOL; 987 $$.a.iplookupsubtype = 0; 988 $$.a.iplookupnum = makepool($5); 989 } 990 | hash '/' YY_NUMBER { hashed = 1; 991 yyexpectaddr = 0; 992 $$.v = 0; 993 $$.ifpos = -1; 994 $$.f = AF_UNSPEC; 995 $$.type = FRI_LOOKUP; 996 $$.a.iplookuptype = IPLT_HASH; 997 $$.a.iplookupsubtype = 0; 998 $$.a.iplookupnum = $3; 999 } 1000 | hash '/' YY_STR { hashed = 1; 1001 $$.type = FRI_LOOKUP; 1002 $$.v = 0; 1003 $$.ifpos = -1; 1004 $$.f = AF_UNSPEC; 1005 $$.a.iplookuptype = IPLT_HASH; 1006 $$.a.iplookupsubtype = 1; 1007 $$.a.iplookupname = addname(&fr, $3); 1008 } 1009 | hash '=' '(' { hashed = 1; 1010 yyexpectaddr = 1; 1011 } 1012 addrlist ')' { yyexpectaddr = 0; 1013 $$.v = 0; 1014 $$.ifpos = -1; 1015 $$.f = AF_UNSPEC; 1016 $$.type = FRI_LOOKUP; 1017 $$.a.iplookuptype = IPLT_HASH; 1018 $$.a.iplookupsubtype = 0; 1019 $$.a.iplookupnum = makehash($5); 1020 } 1021 | ipaddr { $$ = $1; 1022 yyexpectaddr = 0; } 1023 ; 1024 1025ipaddr: IPFY_ANY { memset(&($$), 0, sizeof($$)); 1026 $$.type = FRI_NORMAL; 1027 $$.ifpos = -1; 1028 yyexpectaddr = 0; 1029 } 1030 | hostname { memset(&($$), 0, sizeof($$)); 1031 $$.a = $1.adr; 1032 $$.f = $1.f; 1033 if ($1.f == AF_INET6) 1034 fill6bits(128, $$.m.i6); 1035 else if ($1.f == AF_INET) 1036 fill6bits(32, $$.m.i6); 1037 $$.v = ftov($1.f); 1038 $$.ifpos = dynamic; 1039 $$.type = FRI_NORMAL; 1040 } 1041 | hostname { yyresetdict(); } 1042 maskspace { yysetdict(maskwords); 1043 yyexpectaddr = 2; } 1044 ipmask { memset(&($$), 0, sizeof($$)); 1045 ntomask($1.f, $5, $$.m.i6); 1046 $$.a = $1.adr; 1047 $$.a.i6[0] &= $$.m.i6[0]; 1048 $$.a.i6[1] &= $$.m.i6[1]; 1049 $$.a.i6[2] &= $$.m.i6[2]; 1050 $$.a.i6[3] &= $$.m.i6[3]; 1051 $$.f = $1.f; 1052 $$.v = ftov($1.f); 1053 $$.type = ifpflag; 1054 $$.ifpos = dynamic; 1055 if (ifpflag != 0 && $$.v == 0) { 1056 if (frc->fr_family == AF_INET6){ 1057 $$.v = 6; 1058 $$.f = AF_INET6; 1059 } else { 1060 $$.v = 4; 1061 $$.f = AF_INET; 1062 } 1063 } 1064 yyresetdict(); 1065 yyexpectaddr = 0; 1066 } 1067 | '(' YY_STR ')' { memset(&($$), 0, sizeof($$)); 1068 $$.type = FRI_DYNAMIC; 1069 ifpflag = FRI_DYNAMIC; 1070 $$.ifpos = addname(&fr, $2); 1071 $$.lif = 0; 1072 } 1073 | '(' YY_STR ')' '/' 1074 { ifpflag = FRI_DYNAMIC; yysetdict(maskwords); } 1075 maskopts 1076 { memset(&($$), 0, sizeof($$)); 1077 $$.type = ifpflag; 1078 $$.ifpos = addname(&fr, $2); 1079 $$.lif = 0; 1080 if (frc->fr_family == AF_UNSPEC) 1081 frc->fr_family = AF_INET; 1082 if (ifpflag == FRI_DYNAMIC) { 1083 ntomask(frc->fr_family, 1084 $6, $$.m.i6); 1085 } 1086 yyresetdict(); 1087 yyexpectaddr = 0; 1088 } 1089 | '(' YY_STR ':' YY_NUMBER ')' '/' 1090 { ifpflag = FRI_DYNAMIC; yysetdict(maskwords); } 1091 maskopts 1092 { memset(&($$), 0, sizeof($$)); 1093 $$.type = ifpflag; 1094 $$.ifpos = addname(&fr, $2); 1095 $$.lif = $4; 1096 if (frc->fr_family == AF_UNSPEC) 1097 frc->fr_family = AF_INET; 1098 if (ifpflag == FRI_DYNAMIC) { 1099 ntomask(frc->fr_family, 1100 $8, $$.m.i6); 1101 } 1102 yyresetdict(); 1103 yyexpectaddr = 0; 1104 } 1105 ; 1106 1107maskspace: 1108 '/' 1109 | IPFY_MASK 1110 ; 1111 1112ipmask: ipv4 { $$ = count4bits($1.s_addr); } 1113 | YY_HEX { $$ = count4bits(htonl($1)); } 1114 | YY_NUMBER { $$ = $1; } 1115 | YY_IPV6 { $$ = count6bits($1.i6); } 1116 | maskopts { $$ = $1; } 1117 ; 1118 1119maskopts: 1120 IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 1121 ifpflag = FRI_BROADCAST; 1122 } else { 1123 YYERROR; 1124 } 1125 $$ = 0; 1126 } 1127 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 1128 ifpflag = FRI_NETWORK; 1129 } else { 1130 YYERROR; 1131 } 1132 $$ = 0; 1133 } 1134 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 1135 ifpflag = FRI_NETMASKED; 1136 } else { 1137 YYERROR; 1138 } 1139 $$ = 0; 1140 } 1141 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 1142 ifpflag = FRI_PEERADDR; 1143 } else { 1144 YYERROR; 1145 } 1146 $$ = 0; 1147 } 1148 | YY_NUMBER { $$ = $1; } 1149 ; 1150 1151hostname: 1152 ipv4 { memset(&($$), 0, sizeof($$)); 1153 $$.adr.in4 = $1; 1154 if (frc->fr_family == AF_INET6) 1155 YYERROR; 1156 $$.f = AF_INET; 1157 yyexpectaddr = 2; 1158 } 1159 | YY_NUMBER { memset(&($$), 0, sizeof($$)); 1160 if (frc->fr_family == AF_INET6) 1161 YYERROR; 1162 $$.adr.in4_addr = $1; 1163 $$.f = AF_INET; 1164 yyexpectaddr = 2; 1165 } 1166 | YY_HEX { memset(&($$), 0, sizeof($$)); 1167 if (frc->fr_family == AF_INET6) 1168 YYERROR; 1169 $$.adr.in4_addr = $1; 1170 $$.f = AF_INET; 1171 yyexpectaddr = 2; 1172 } 1173 | YY_STR { memset(&($$), 0, sizeof($$)); 1174 if (lookuphost($1, &$$.adr) == 0) 1175 $$.f = AF_INET; 1176 free($1); 1177 yyexpectaddr = 2; 1178 } 1179 | YY_IPV6 { memset(&($$), 0, sizeof($$)); 1180 if (frc->fr_family == AF_INET) 1181 YYERROR; 1182 $$.adr = $1; 1183 $$.f = AF_INET6; 1184 yyexpectaddr = 2; 1185 } 1186 ; 1187 1188addrlist: 1189 ipaddr { $$ = newalist(NULL); 1190 $$->al_family = $1.f; 1191 $$->al_i6addr = $1.a; 1192 $$->al_i6mask = $1.m; 1193 } 1194 | ipaddr ',' { yyexpectaddr = 1; } addrlist 1195 { $$ = newalist($4); 1196 $$->al_family = $1.f; 1197 $$->al_i6addr = $1.a; 1198 $$->al_i6mask = $1.m; 1199 } 1200 ; 1201 1202pool: IPFY_POOL { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1203 ; 1204 1205hash: IPFY_HASH { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1206 ; 1207 1208poollist: 1209 ipaddr { $$ = newalist(NULL); 1210 $$->al_family = $1.f; 1211 $$->al_i6addr = $1.a; 1212 $$->al_i6mask = $1.m; 1213 } 1214 | '!' ipaddr { $$ = newalist(NULL); 1215 $$->al_not = 1; 1216 $$->al_family = $2.f; 1217 $$->al_i6addr = $2.a; 1218 $$->al_i6mask = $2.m; 1219 } 1220 | poollist ',' ipaddr 1221 { $$ = newalist($1); 1222 $$->al_family = $3.f; 1223 $$->al_i6addr = $3.a; 1224 $$->al_i6mask = $3.m; 1225 } 1226 | poollist ',' '!' ipaddr 1227 { $$ = newalist($1); 1228 $$->al_not = 1; 1229 $$->al_family = $4.f; 1230 $$->al_i6addr = $4.a; 1231 $$->al_i6mask = $4.m; 1232 } 1233 ; 1234 1235port: IPFY_PORT { yyexpectaddr = 0; 1236 yycont = NULL; 1237 if (frc->fr_proto != 0 && 1238 frc->fr_proto != IPPROTO_UDP && 1239 frc->fr_proto != IPPROTO_TCP) 1240 yyerror("port use incorrect"); 1241 } 1242 ; 1243 1244portc: port compare { $$ = $2; 1245 yysetdict(NULL); 1246 } 1247 | porteq { $$ = $1; } 1248 ; 1249 1250porteq: port '=' { $$ = FR_EQUAL; 1251 yysetdict(NULL); 1252 } 1253 ; 1254 1255portr: IPFY_PORT { yyexpectaddr = 0; 1256 yycont = NULL; 1257 yysetdict(NULL); 1258 } 1259 ; 1260 1261portcomp: 1262 portc portnum { $$.pc = $1; 1263 $$.p1 = $2; 1264 yyresetdict(); 1265 } 1266 ; 1267 1268portrange: 1269 portr portnum range portnum { $$.p1 = $2; 1270 $$.pc = $3; 1271 $$.p2 = $4; 1272 yyresetdict(); 1273 } 1274 ; 1275 1276icmp: | itype icode 1277 ; 1278 1279itype: seticmptype icmptype 1280 { DOALL(fr->fr_icmp = htons($2 << 8); fr->fr_icmpm = htons(0xff00);); 1281 yyresetdict(); 1282 } 1283 | seticmptype lstart typelist lend { yyresetdict(); } 1284 ; 1285 1286seticmptype: 1287 IPFY_ICMPTYPE { if (frc->fr_family == AF_UNSPEC) 1288 frc->fr_family = AF_INET; 1289 if (frc->fr_family == AF_INET && 1290 frc->fr_type == FR_T_IPF && 1291 frc->fr_proto != IPPROTO_ICMP) { 1292 yyerror("proto not icmp"); 1293 } 1294 if (frc->fr_family == AF_INET6 && 1295 frc->fr_type == FR_T_IPF && 1296 frc->fr_proto != IPPROTO_ICMPV6) { 1297 yyerror("proto not ipv6-icmp"); 1298 } 1299 setipftype(); 1300 DOALL(if (fr->fr_family == AF_INET) { \ 1301 fr->fr_ip.fi_v = 4; \ 1302 fr->fr_mip.fi_v = 0xf; \ 1303 } 1304 if (fr->fr_family == AF_INET6) { \ 1305 fr->fr_ip.fi_v = 6; \ 1306 fr->fr_mip.fi_v = 0xf; \ 1307 } 1308 ) 1309 yysetdict(NULL); 1310 } 1311 ; 1312 1313icode: | seticmpcode icmpcode 1314 { DOALL(fr->fr_icmp |= htons($2); fr->fr_icmpm |= htons(0xff);); 1315 yyresetdict(); 1316 } 1317 | seticmpcode lstart codelist lend { yyresetdict(); } 1318 ; 1319 1320seticmpcode: 1321 IPFY_ICMPCODE { yysetdict(icmpcodewords); } 1322 ; 1323 1324typelist: 1325 icmptype 1326 { DOREM(fr->fr_icmp = htons($1 << 8); fr->fr_icmpm = htons(0xff00);) } 1327 | typelist lmore icmptype 1328 { DOREM(fr->fr_icmp = htons($3 << 8); fr->fr_icmpm = htons(0xff00);) } 1329 ; 1330 1331codelist: 1332 icmpcode 1333 { DOREM(fr->fr_icmp |= htons($1); fr->fr_icmpm |= htons(0xff);) } 1334 | codelist lmore icmpcode 1335 { DOREM(fr->fr_icmp &= htons(0xff00); fr->fr_icmp |= htons($3); \ 1336 fr->fr_icmpm |= htons(0xff);) } 1337 ; 1338 1339age: | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1340 fr->fr_age[1] = $2;) } 1341 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1342 { DOALL(fr->fr_age[0] = $2; \ 1343 fr->fr_age[1] = $4;) } 1344 ; 1345 1346keep: | IPFY_KEEP keepstate keep 1347 | IPFY_KEEP keepfrag keep 1348 ; 1349 1350keepstate: 1351 IPFY_STATE stateoptlist { DOALL(fr->fr_flags |= FR_KEEPSTATE;)} 1352 ; 1353 1354keepfrag: 1355 IPFY_FRAGS fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1356 | IPFY_FRAG fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1357 ; 1358 1359fragoptlist: 1360 | '(' fragopts ')' 1361 ; 1362 1363fragopts: 1364 fragopt lanother fragopts 1365 | fragopt 1366 ; 1367 1368fragopt: 1369 IPFY_STRICT { DOALL(fr->fr_flags |= FR_FRSTRICT;) } 1370 ; 1371 1372stateoptlist: 1373 | '(' stateopts ')' 1374 ; 1375 1376stateopts: 1377 stateopt lanother stateopts 1378 | stateopt 1379 ; 1380 1381stateopt: 1382 IPFY_LIMIT YY_NUMBER { DOALL(fr->fr_statemax = $2;) } 1383 | IPFY_STRICT { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1384 YYERROR; \ 1385 } else if (fr->fr_flags & FR_STLOOSE) {\ 1386 YYERROR; \ 1387 } else \ 1388 fr->fr_flags |= FR_STSTRICT;) 1389 } 1390 | IPFY_LOOSE { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1391 YYERROR; \ 1392 } else if (fr->fr_flags & FR_STSTRICT){\ 1393 YYERROR; \ 1394 } else \ 1395 fr->fr_flags |= FR_STLOOSE;) 1396 } 1397 | IPFY_NEWISN { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1398 YYERROR; \ 1399 } else \ 1400 fr->fr_flags |= FR_NEWISN;) 1401 } 1402 | IPFY_NOICMPERR { DOALL(fr->fr_flags |= FR_NOICMPERR;) } 1403 1404 | IPFY_SYNC { DOALL(fr->fr_flags |= FR_STATESYNC;) } 1405 | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1406 fr->fr_age[1] = $2;) } 1407 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1408 { DOALL(fr->fr_age[0] = $2; \ 1409 fr->fr_age[1] = $4;) } 1410 | IPFY_ICMPHEAD groupname 1411 { DOALL(seticmphead(&fr, $2);) 1412 free($2); 1413 } 1414 | IPFY_NOLOG 1415 { DOALL(fr->fr_nostatelog = 1;) } 1416 | IPFY_RPC 1417 { DOALL(fr->fr_rpc = 1;) } 1418 | IPFY_RPC IPFY_IN YY_STR 1419 { DOALL(fr->fr_rpc = 1;) } 1420 | IPFY_MAX_SRCS YY_NUMBER 1421 { DOALL(fr->fr_srctrack.ht_max_nodes = $2;) } 1422 | IPFY_MAX_PER_SRC YY_NUMBER 1423 { DOALL(fr->fr_srctrack.ht_max_per_node = $2; \ 1424 fr->fr_srctrack.ht_netmask = \ 1425 fr->fr_family == AF_INET ? 32: 128;) 1426 } 1427 | IPFY_MAX_PER_SRC YY_NUMBER '/' YY_NUMBER 1428 { DOALL(fr->fr_srctrack.ht_max_per_node = $2; \ 1429 fr->fr_srctrack.ht_netmask = $4;) 1430 } 1431 ; 1432 1433portnum: 1434 servicename { if (getport(frc, $1, 1435 &($$), NULL) == -1) 1436 yyerror("service unknown"); 1437 $$ = ntohs($$); 1438 free($1); 1439 } 1440 | YY_NUMBER { if ($1 > 65535) /* Unsigned */ 1441 yyerror("invalid port number"); 1442 else 1443 $$ = $1; 1444 } 1445 ; 1446 1447withlist: 1448 withopt { nowith = 0; } 1449 | withlist withopt { nowith = 0; } 1450 | withlist ',' withopt { nowith = 0; } 1451 ; 1452 1453withopt: 1454 opttype { DOALL(fr->fr_flx |= $1; fr->fr_mflx |= $1;) } 1455 | notwith opttype { DOALL(fr->fr_mflx |= $2;) } 1456 | ipopt ipopts { yyresetdict(); } 1457 | notwith ipopt ipopts { yyresetdict(); } 1458 | startv6hdr ipv6hdrs { yyresetdict(); } 1459 ; 1460 1461ipopt: IPFY_OPT { yysetdict(ipv4optwords); } 1462 ; 1463 1464startv6hdr: 1465 IPFY_V6HDR { if (frc->fr_family != AF_INET6) 1466 yyerror("only available with IPv6"); 1467 yysetdict(ipv6optwords); 1468 } 1469 ; 1470 1471notwith: 1472 IPFY_NOT { nowith = 1; } 1473 | IPFY_NO { nowith = 1; } 1474 ; 1475 1476opttype: 1477 IPFY_IPOPTS { $$ = FI_OPTIONS; } 1478 | IPFY_SHORT { $$ = FI_SHORT; } 1479 | IPFY_NAT { $$ = FI_NATED; } 1480 | IPFY_BAD { $$ = FI_BAD; } 1481 | IPFY_BADNAT { $$ = FI_BADNAT; } 1482 | IPFY_BADSRC { $$ = FI_BADSRC; } 1483 | IPFY_LOWTTL { $$ = FI_LOWTTL; } 1484 | IPFY_FRAG { $$ = FI_FRAG; } 1485 | IPFY_FRAGBODY { $$ = FI_FRAGBODY; } 1486 | IPFY_FRAGS { $$ = FI_FRAG; } 1487 | IPFY_MBCAST { $$ = FI_MBCAST; } 1488 | IPFY_MULTICAST { $$ = FI_MULTICAST; } 1489 | IPFY_BROADCAST { $$ = FI_BROADCAST; } 1490 | IPFY_STATE { $$ = FI_STATE; } 1491 | IPFY_OOW { $$ = FI_OOW; } 1492 | IPFY_AH { $$ = FI_AH; } 1493 | IPFY_V6HDRS { $$ = FI_V6EXTHDR; } 1494 ; 1495 1496ipopts: optlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1497 if (fr->fr_family == AF_UNSPEC) { 1498 fr->fr_family = AF_INET; 1499 fr->fr_ip.fi_v = 4; 1500 fr->fr_mip.fi_v = 0xf; 1501 } else if (fr->fr_family != AF_INET) { 1502 YYERROR; 1503 } 1504 if (!nowith) 1505 fr->fr_ip.fi_optmsk |= $1;) 1506 } 1507 ; 1508 1509optlist: 1510 opt { $$ |= $1; } 1511 | optlist ',' opt { $$ |= $1 | $3; } 1512 ; 1513 1514ipv6hdrs: 1515 ipv6hdrlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1516 if (!nowith) 1517 fr->fr_ip.fi_optmsk |= $1;) 1518 } 1519 ; 1520 1521ipv6hdrlist: 1522 ipv6hdr { $$ |= $1; } 1523 | ipv6hdrlist ',' ipv6hdr { $$ |= $1 | $3; } 1524 ; 1525 1526secname: 1527 seclevel { $$ |= $1; } 1528 | secname ',' seclevel { $$ |= $1 | $3; } 1529 ; 1530 1531seclevel: 1532 IPFY_SEC_UNC { $$ = secbit(IPSO_CLASS_UNCL); } 1533 | IPFY_SEC_CONF { $$ = secbit(IPSO_CLASS_CONF); } 1534 | IPFY_SEC_RSV1 { $$ = secbit(IPSO_CLASS_RES1); } 1535 | IPFY_SEC_RSV2 { $$ = secbit(IPSO_CLASS_RES2); } 1536 | IPFY_SEC_RSV3 { $$ = secbit(IPSO_CLASS_RES3); } 1537 | IPFY_SEC_RSV4 { $$ = secbit(IPSO_CLASS_RES4); } 1538 | IPFY_SEC_SEC { $$ = secbit(IPSO_CLASS_SECR); } 1539 | IPFY_SEC_TS { $$ = secbit(IPSO_CLASS_TOPS); } 1540 ; 1541 1542icmptype: 1543 YY_NUMBER { $$ = $1; } 1544 | YY_STR { $$ = geticmptype(frc->fr_family, $1); 1545 if ($$ == -1) 1546 yyerror("unrecognised icmp type"); 1547 } 1548 ; 1549 1550icmpcode: 1551 YY_NUMBER { $$ = $1; } 1552 | IPFY_ICMPC_NETUNR { $$ = ICMP_UNREACH_NET; } 1553 | IPFY_ICMPC_HSTUNR { $$ = ICMP_UNREACH_HOST; } 1554 | IPFY_ICMPC_PROUNR { $$ = ICMP_UNREACH_PROTOCOL; } 1555 | IPFY_ICMPC_PORUNR { $$ = ICMP_UNREACH_PORT; } 1556 | IPFY_ICMPC_NEEDF { $$ = ICMP_UNREACH_NEEDFRAG; } 1557 | IPFY_ICMPC_SRCFAIL { $$ = ICMP_UNREACH_SRCFAIL; } 1558 | IPFY_ICMPC_NETUNK { $$ = ICMP_UNREACH_NET_UNKNOWN; } 1559 | IPFY_ICMPC_HSTUNK { $$ = ICMP_UNREACH_HOST_UNKNOWN; } 1560 | IPFY_ICMPC_ISOLATE { $$ = ICMP_UNREACH_ISOLATED; } 1561 | IPFY_ICMPC_NETPRO { $$ = ICMP_UNREACH_NET_PROHIB; } 1562 | IPFY_ICMPC_HSTPRO { $$ = ICMP_UNREACH_HOST_PROHIB; } 1563 | IPFY_ICMPC_NETTOS { $$ = ICMP_UNREACH_TOSNET; } 1564 | IPFY_ICMPC_HSTTOS { $$ = ICMP_UNREACH_TOSHOST; } 1565 | IPFY_ICMPC_FLTPRO { $$ = ICMP_UNREACH_ADMIN_PROHIBIT; } 1566 | IPFY_ICMPC_HSTPRE { $$ = 14; } 1567 | IPFY_ICMPC_CUTPRE { $$ = 15; } 1568 ; 1569 1570opt: 1571 IPFY_IPOPT_NOP { $$ = getoptbyvalue(IPOPT_NOP); } 1572 | IPFY_IPOPT_RR { $$ = getoptbyvalue(IPOPT_RR); } 1573 | IPFY_IPOPT_ZSU { $$ = getoptbyvalue(IPOPT_ZSU); } 1574 | IPFY_IPOPT_MTUP { $$ = getoptbyvalue(IPOPT_MTUP); } 1575 | IPFY_IPOPT_MTUR { $$ = getoptbyvalue(IPOPT_MTUR); } 1576 | IPFY_IPOPT_ENCODE { $$ = getoptbyvalue(IPOPT_ENCODE); } 1577 | IPFY_IPOPT_TS { $$ = getoptbyvalue(IPOPT_TS); } 1578 | IPFY_IPOPT_TR { $$ = getoptbyvalue(IPOPT_TR); } 1579 | IPFY_IPOPT_SEC { $$ = getoptbyvalue(IPOPT_SECURITY); } 1580 | IPFY_IPOPT_LSRR { $$ = getoptbyvalue(IPOPT_LSRR); } 1581 | IPFY_IPOPT_ESEC { $$ = getoptbyvalue(IPOPT_E_SEC); } 1582 | IPFY_IPOPT_CIPSO { $$ = getoptbyvalue(IPOPT_CIPSO); } 1583 | IPFY_IPOPT_CIPSO doi { $$ = getoptbyvalue(IPOPT_CIPSO); } 1584 | IPFY_IPOPT_SATID { $$ = getoptbyvalue(IPOPT_SATID); } 1585 | IPFY_IPOPT_SSRR { $$ = getoptbyvalue(IPOPT_SSRR); } 1586 | IPFY_IPOPT_ADDEXT { $$ = getoptbyvalue(IPOPT_ADDEXT); } 1587 | IPFY_IPOPT_VISA { $$ = getoptbyvalue(IPOPT_VISA); } 1588 | IPFY_IPOPT_IMITD { $$ = getoptbyvalue(IPOPT_IMITD); } 1589 | IPFY_IPOPT_EIP { $$ = getoptbyvalue(IPOPT_EIP); } 1590 | IPFY_IPOPT_FINN { $$ = getoptbyvalue(IPOPT_FINN); } 1591 | IPFY_IPOPT_DPS { $$ = getoptbyvalue(IPOPT_DPS); } 1592 | IPFY_IPOPT_SDB { $$ = getoptbyvalue(IPOPT_SDB); } 1593 | IPFY_IPOPT_NSAPA { $$ = getoptbyvalue(IPOPT_NSAPA); } 1594 | IPFY_IPOPT_RTRALRT { $$ = getoptbyvalue(IPOPT_RTRALRT); } 1595 | IPFY_IPOPT_UMP { $$ = getoptbyvalue(IPOPT_UMP); } 1596 | setsecclass secname 1597 { DOALL(fr->fr_mip.fi_secmsk |= $2; 1598 if (fr->fr_family == AF_UNSPEC) { 1599 fr->fr_family = AF_INET; 1600 fr->fr_ip.fi_v = 4; 1601 fr->fr_mip.fi_v = 0xf; 1602 } else if (fr->fr_family != AF_INET) { 1603 YYERROR; 1604 } 1605 if (!nowith) 1606 fr->fr_ip.fi_secmsk |= $2;) 1607 $$ = 0; 1608 yyresetdict(); 1609 } 1610 ; 1611 1612setsecclass: 1613 IPFY_SECCLASS { yysetdict(ipv4secwords); } 1614 ; 1615 1616doi: IPFY_DOI YY_NUMBER { DOALL(fr->fr_doimask = 0xffffffff; \ 1617 if (!nowith) \ 1618 fr->fr_doi = $2;) } 1619 | IPFY_DOI YY_HEX { DOALL(fr->fr_doimask = 0xffffffff; \ 1620 if (!nowith) \ 1621 fr->fr_doi = $2;) } 1622 ; 1623 1624ipv6hdr: 1625 IPFY_AH { $$ = getv6optbyvalue(IPPROTO_AH); } 1626 | IPFY_IPV6OPT_DSTOPTS { $$ = getv6optbyvalue(IPPROTO_DSTOPTS); } 1627 | IPFY_IPV6OPT_ESP { $$ = getv6optbyvalue(IPPROTO_ESP); } 1628 | IPFY_IPV6OPT_HOPOPTS { $$ = getv6optbyvalue(IPPROTO_HOPOPTS); } 1629 | IPFY_IPV6OPT_IPV6 { $$ = getv6optbyvalue(IPPROTO_IPV6); } 1630 | IPFY_IPV6OPT_NONE { $$ = getv6optbyvalue(IPPROTO_NONE); } 1631 | IPFY_IPV6OPT_ROUTING { $$ = getv6optbyvalue(IPPROTO_ROUTING); } 1632 | IPFY_IPV6OPT_FRAG { $$ = getv6optbyvalue(IPPROTO_FRAGMENT); } 1633 | IPFY_IPV6OPT_MOBILITY { $$ = getv6optbyvalue(IPPROTO_MOBILITY); } 1634 ; 1635 1636level: IPFY_LEVEL { setsyslog(); } 1637 ; 1638 1639loglevel: 1640 priority { fr->fr_loglevel = LOG_LOCAL0|$1; } 1641 | facility '.' priority { fr->fr_loglevel = $1 | $3; } 1642 ; 1643 1644facility: 1645 IPFY_FAC_KERN { $$ = LOG_KERN; } 1646 | IPFY_FAC_USER { $$ = LOG_USER; } 1647 | IPFY_FAC_MAIL { $$ = LOG_MAIL; } 1648 | IPFY_FAC_DAEMON { $$ = LOG_DAEMON; } 1649 | IPFY_FAC_AUTH { $$ = LOG_AUTH; } 1650 | IPFY_FAC_SYSLOG { $$ = LOG_SYSLOG; } 1651 | IPFY_FAC_LPR { $$ = LOG_LPR; } 1652 | IPFY_FAC_NEWS { $$ = LOG_NEWS; } 1653 | IPFY_FAC_UUCP { $$ = LOG_UUCP; } 1654 | IPFY_FAC_CRON { $$ = LOG_CRON; } 1655 | IPFY_FAC_FTP { $$ = LOG_FTP; } 1656 | IPFY_FAC_AUTHPRIV { $$ = LOG_AUTHPRIV; } 1657 | IPFY_FAC_AUDIT { $$ = LOG_AUDIT; } 1658 | IPFY_FAC_LFMT { $$ = LOG_LFMT; } 1659 | IPFY_FAC_LOCAL0 { $$ = LOG_LOCAL0; } 1660 | IPFY_FAC_LOCAL1 { $$ = LOG_LOCAL1; } 1661 | IPFY_FAC_LOCAL2 { $$ = LOG_LOCAL2; } 1662 | IPFY_FAC_LOCAL3 { $$ = LOG_LOCAL3; } 1663 | IPFY_FAC_LOCAL4 { $$ = LOG_LOCAL4; } 1664 | IPFY_FAC_LOCAL5 { $$ = LOG_LOCAL5; } 1665 | IPFY_FAC_LOCAL6 { $$ = LOG_LOCAL6; } 1666 | IPFY_FAC_LOCAL7 { $$ = LOG_LOCAL7; } 1667 | IPFY_FAC_SECURITY { $$ = LOG_SECURITY; } 1668 ; 1669 1670priority: 1671 IPFY_PRI_EMERG { $$ = LOG_EMERG; } 1672 | IPFY_PRI_ALERT { $$ = LOG_ALERT; } 1673 | IPFY_PRI_CRIT { $$ = LOG_CRIT; } 1674 | IPFY_PRI_ERR { $$ = LOG_ERR; } 1675 | IPFY_PRI_WARN { $$ = LOG_WARNING; } 1676 | IPFY_PRI_NOTICE { $$ = LOG_NOTICE; } 1677 | IPFY_PRI_INFO { $$ = LOG_INFO; } 1678 | IPFY_PRI_DEBUG { $$ = LOG_DEBUG; } 1679 ; 1680 1681compare: 1682 YY_CMP_EQ { $$ = FR_EQUAL; } 1683 | YY_CMP_NE { $$ = FR_NEQUAL; } 1684 | YY_CMP_LT { $$ = FR_LESST; } 1685 | YY_CMP_LE { $$ = FR_LESSTE; } 1686 | YY_CMP_GT { $$ = FR_GREATERT; } 1687 | YY_CMP_GE { $$ = FR_GREATERTE; } 1688 ; 1689 1690range: YY_RANGE_IN { $$ = FR_INRANGE; } 1691 | YY_RANGE_OUT { $$ = FR_OUTRANGE; } 1692 | ':' { $$ = FR_INCRANGE; } 1693 ; 1694 1695servicename: 1696 YY_STR { $$ = $1; } 1697 ; 1698 1699interfacename: name { $$ = $1; } 1700 | name ':' YY_NUMBER 1701 { $$ = $1; 1702 fprintf(stderr, "%d: Logical interface %s:%d unsupported, " 1703 "use the physical interface %s instead.\n", 1704 yylineNum, $1, $3, $1); 1705 } 1706 ; 1707 1708name: YY_STR { $$ = $1; } 1709 | '-' { $$ = strdup("-"); } 1710 ; 1711 1712ipv4_16: 1713 YY_NUMBER '.' YY_NUMBER 1714 { if ($1 > 255 || $3 > 255) { 1715 yyerror("Invalid octet string for IP address"); 1716 return 0; 1717 } 1718 $$.s_addr = ($1 << 24) | ($3 << 16); 1719 $$.s_addr = htonl($$.s_addr); 1720 } 1721 ; 1722 1723ipv4_24: 1724 ipv4_16 '.' YY_NUMBER 1725 { if ($3 > 255) { 1726 yyerror("Invalid octet string for IP address"); 1727 return 0; 1728 } 1729 $$.s_addr |= htonl($3 << 8); 1730 } 1731 ; 1732 1733ipv4: ipv4_24 '.' YY_NUMBER 1734 { if ($3 > 255) { 1735 yyerror("Invalid octet string for IP address"); 1736 return 0; 1737 } 1738 $$.s_addr |= htonl($3); 1739 } 1740 | ipv4_24 1741 | ipv4_16 1742 ; 1743 1744%% 1745 1746 1747static struct wordtab ipfwords[] = { 1748 { "age", IPFY_AGE }, 1749 { "ah", IPFY_AH }, 1750 { "all", IPFY_ALL }, 1751 { "and", IPFY_AND }, 1752 { "auth", IPFY_AUTH }, 1753 { "bad", IPFY_BAD }, 1754 { "bad-nat", IPFY_BADNAT }, 1755 { "bad-src", IPFY_BADSRC }, 1756 { "bcast", IPFY_BROADCAST }, 1757 { "block", IPFY_BLOCK }, 1758 { "body", IPFY_BODY }, 1759 { "bpf-v4", IPFY_BPFV4 }, 1760#ifdef USE_INET6 1761 { "bpf-v6", IPFY_BPFV6 }, 1762#endif 1763 { "call", IPFY_CALL }, 1764 { "code", IPFY_ICMPCODE }, 1765 { "comment", IPFY_COMMENT }, 1766 { "count", IPFY_COUNT }, 1767 { "decapsulate", IPFY_DECAPS }, 1768 { "dstlist", IPFY_DSTLIST }, 1769 { "doi", IPFY_DOI }, 1770 { "dup-to", IPFY_DUPTO }, 1771 { "eq", YY_CMP_EQ }, 1772 { "esp", IPFY_ESP }, 1773 { "exp", IPFY_IPFEXPR }, 1774 { "family", IPFY_FAMILY }, 1775 { "fastroute", IPFY_FROUTE }, 1776 { "first", IPFY_FIRST }, 1777 { "flags", IPFY_FLAGS }, 1778 { "frag", IPFY_FRAG }, 1779 { "frag-body", IPFY_FRAGBODY }, 1780 { "frags", IPFY_FRAGS }, 1781 { "from", IPFY_FROM }, 1782 { "ge", YY_CMP_GE }, 1783 { "group", IPFY_GROUP }, 1784 { "gt", YY_CMP_GT }, 1785 { "head", IPFY_HEAD }, 1786 { "icmp", IPFY_ICMP }, 1787 { "icmp-head", IPFY_ICMPHEAD }, 1788 { "icmp-type", IPFY_ICMPTYPE }, 1789 { "in", IPFY_IN }, 1790 { "in-via", IPFY_INVIA }, 1791 { "inet", IPFY_INET }, 1792 { "inet6", IPFY_INET6 }, 1793 { "ipopt", IPFY_IPOPTS }, 1794 { "ipopts", IPFY_IPOPTS }, 1795 { "keep", IPFY_KEEP }, 1796 { "l5-as", IPFY_L5AS }, 1797 { "le", YY_CMP_LE }, 1798 { "level", IPFY_LEVEL }, 1799 { "limit", IPFY_LIMIT }, 1800 { "log", IPFY_LOG }, 1801 { "loose", IPFY_LOOSE }, 1802 { "lowttl", IPFY_LOWTTL }, 1803 { "lt", YY_CMP_LT }, 1804 { "mask", IPFY_MASK }, 1805 { "match-tag", IPFY_MATCHTAG }, 1806 { "max-per-src", IPFY_MAX_PER_SRC }, 1807 { "max-srcs", IPFY_MAX_SRCS }, 1808 { "mbcast", IPFY_MBCAST }, 1809 { "mcast", IPFY_MULTICAST }, 1810 { "multicast", IPFY_MULTICAST }, 1811 { "nat", IPFY_NAT }, 1812 { "ne", YY_CMP_NE }, 1813 { "net", IPFY_NETWORK }, 1814 { "newisn", IPFY_NEWISN }, 1815 { "no", IPFY_NO }, 1816 { "no-icmp-err", IPFY_NOICMPERR }, 1817 { "nolog", IPFY_NOLOG }, 1818 { "nomatch", IPFY_NOMATCH }, 1819 { "now", IPFY_NOW }, 1820 { "not", IPFY_NOT }, 1821 { "oow", IPFY_OOW }, 1822 { "on", IPFY_ON }, 1823 { "opt", IPFY_OPT }, 1824 { "or-block", IPFY_ORBLOCK }, 1825 { "out", IPFY_OUT }, 1826 { "out-via", IPFY_OUTVIA }, 1827 { "pass", IPFY_PASS }, 1828 { "port", IPFY_PORT }, 1829 { "pps", IPFY_PPS }, 1830 { "preauth", IPFY_PREAUTH }, 1831 { "proto", IPFY_PROTO }, 1832 { "quick", IPFY_QUICK }, 1833 { "reply-to", IPFY_REPLY_TO }, 1834 { "return-icmp", IPFY_RETICMP }, 1835 { "return-icmp-as-dest", IPFY_RETICMPASDST }, 1836 { "return-rst", IPFY_RETRST }, 1837 { "route-to", IPFY_ROUTETO }, 1838 { "rule-ttl", IPFY_RULETTL }, 1839 { "rpc", IPFY_RPC }, 1840 { "sec-class", IPFY_SECCLASS }, 1841 { "set", IPFY_SET }, 1842 { "set-tag", IPFY_SETTAG }, 1843 { "skip", IPFY_SKIP }, 1844 { "short", IPFY_SHORT }, 1845 { "state", IPFY_STATE }, 1846 { "state-age", IPFY_AGE }, 1847 { "strict", IPFY_STRICT }, 1848 { "sync", IPFY_SYNC }, 1849 { "tcp", IPFY_TCP }, 1850 { "tcp-udp", IPFY_TCPUDP }, 1851 { "tos", IPFY_TOS }, 1852 { "to", IPFY_TO }, 1853 { "ttl", IPFY_TTL }, 1854 { "udp", IPFY_UDP }, 1855 { "v6hdr", IPFY_V6HDR }, 1856 { "v6hdrs", IPFY_V6HDRS }, 1857 { "with", IPFY_WITH }, 1858 { NULL, 0 } 1859}; 1860 1861static struct wordtab addrwords[] = { 1862 { "any", IPFY_ANY }, 1863 { "hash", IPFY_HASH }, 1864 { "pool", IPFY_POOL }, 1865 { NULL, 0 } 1866}; 1867 1868static struct wordtab maskwords[] = { 1869 { "broadcast", IPFY_BROADCAST }, 1870 { "netmasked", IPFY_NETMASKED }, 1871 { "network", IPFY_NETWORK }, 1872 { "peer", IPFY_PEER }, 1873 { NULL, 0 } 1874}; 1875 1876static struct wordtab icmpcodewords[] = { 1877 { "cutoff-preced", IPFY_ICMPC_CUTPRE }, 1878 { "filter-prohib", IPFY_ICMPC_FLTPRO }, 1879 { "isolate", IPFY_ICMPC_ISOLATE }, 1880 { "needfrag", IPFY_ICMPC_NEEDF }, 1881 { "net-prohib", IPFY_ICMPC_NETPRO }, 1882 { "net-tos", IPFY_ICMPC_NETTOS }, 1883 { "host-preced", IPFY_ICMPC_HSTPRE }, 1884 { "host-prohib", IPFY_ICMPC_HSTPRO }, 1885 { "host-tos", IPFY_ICMPC_HSTTOS }, 1886 { "host-unk", IPFY_ICMPC_HSTUNK }, 1887 { "host-unr", IPFY_ICMPC_HSTUNR }, 1888 { "net-unk", IPFY_ICMPC_NETUNK }, 1889 { "net-unr", IPFY_ICMPC_NETUNR }, 1890 { "port-unr", IPFY_ICMPC_PORUNR }, 1891 { "proto-unr", IPFY_ICMPC_PROUNR }, 1892 { "srcfail", IPFY_ICMPC_SRCFAIL }, 1893 { NULL, 0 }, 1894}; 1895 1896static struct wordtab ipv4optwords[] = { 1897 { "addext", IPFY_IPOPT_ADDEXT }, 1898 { "cipso", IPFY_IPOPT_CIPSO }, 1899 { "dps", IPFY_IPOPT_DPS }, 1900 { "e-sec", IPFY_IPOPT_ESEC }, 1901 { "eip", IPFY_IPOPT_EIP }, 1902 { "encode", IPFY_IPOPT_ENCODE }, 1903 { "finn", IPFY_IPOPT_FINN }, 1904 { "imitd", IPFY_IPOPT_IMITD }, 1905 { "lsrr", IPFY_IPOPT_LSRR }, 1906 { "mtup", IPFY_IPOPT_MTUP }, 1907 { "mtur", IPFY_IPOPT_MTUR }, 1908 { "nop", IPFY_IPOPT_NOP }, 1909 { "nsapa", IPFY_IPOPT_NSAPA }, 1910 { "rr", IPFY_IPOPT_RR }, 1911 { "rtralrt", IPFY_IPOPT_RTRALRT }, 1912 { "satid", IPFY_IPOPT_SATID }, 1913 { "sdb", IPFY_IPOPT_SDB }, 1914 { "sec", IPFY_IPOPT_SEC }, 1915 { "ssrr", IPFY_IPOPT_SSRR }, 1916 { "tr", IPFY_IPOPT_TR }, 1917 { "ts", IPFY_IPOPT_TS }, 1918 { "ump", IPFY_IPOPT_UMP }, 1919 { "visa", IPFY_IPOPT_VISA }, 1920 { "zsu", IPFY_IPOPT_ZSU }, 1921 { NULL, 0 }, 1922}; 1923 1924static struct wordtab ipv4secwords[] = { 1925 { "confid", IPFY_SEC_CONF }, 1926 { "reserv-1", IPFY_SEC_RSV1 }, 1927 { "reserv-2", IPFY_SEC_RSV2 }, 1928 { "reserv-3", IPFY_SEC_RSV3 }, 1929 { "reserv-4", IPFY_SEC_RSV4 }, 1930 { "secret", IPFY_SEC_SEC }, 1931 { "topsecret", IPFY_SEC_TS }, 1932 { "unclass", IPFY_SEC_UNC }, 1933 { NULL, 0 }, 1934}; 1935 1936static struct wordtab ipv6optwords[] = { 1937 { "dstopts", IPFY_IPV6OPT_DSTOPTS }, 1938 { "esp", IPFY_IPV6OPT_ESP }, 1939 { "frag", IPFY_IPV6OPT_FRAG }, 1940 { "hopopts", IPFY_IPV6OPT_HOPOPTS }, 1941 { "ipv6", IPFY_IPV6OPT_IPV6 }, 1942 { "mobility", IPFY_IPV6OPT_MOBILITY }, 1943 { "none", IPFY_IPV6OPT_NONE }, 1944 { "routing", IPFY_IPV6OPT_ROUTING }, 1945 { NULL, 0 }, 1946}; 1947 1948static struct wordtab logwords[] = { 1949 { "kern", IPFY_FAC_KERN }, 1950 { "user", IPFY_FAC_USER }, 1951 { "mail", IPFY_FAC_MAIL }, 1952 { "daemon", IPFY_FAC_DAEMON }, 1953 { "auth", IPFY_FAC_AUTH }, 1954 { "syslog", IPFY_FAC_SYSLOG }, 1955 { "lpr", IPFY_FAC_LPR }, 1956 { "news", IPFY_FAC_NEWS }, 1957 { "uucp", IPFY_FAC_UUCP }, 1958 { "cron", IPFY_FAC_CRON }, 1959 { "ftp", IPFY_FAC_FTP }, 1960 { "authpriv", IPFY_FAC_AUTHPRIV }, 1961 { "audit", IPFY_FAC_AUDIT }, 1962 { "logalert", IPFY_FAC_LFMT }, 1963 { "console", IPFY_FAC_CONSOLE }, 1964 { "security", IPFY_FAC_SECURITY }, 1965 { "local0", IPFY_FAC_LOCAL0 }, 1966 { "local1", IPFY_FAC_LOCAL1 }, 1967 { "local2", IPFY_FAC_LOCAL2 }, 1968 { "local3", IPFY_FAC_LOCAL3 }, 1969 { "local4", IPFY_FAC_LOCAL4 }, 1970 { "local5", IPFY_FAC_LOCAL5 }, 1971 { "local6", IPFY_FAC_LOCAL6 }, 1972 { "local7", IPFY_FAC_LOCAL7 }, 1973 { "emerg", IPFY_PRI_EMERG }, 1974 { "alert", IPFY_PRI_ALERT }, 1975 { "crit", IPFY_PRI_CRIT }, 1976 { "err", IPFY_PRI_ERR }, 1977 { "warn", IPFY_PRI_WARN }, 1978 { "notice", IPFY_PRI_NOTICE }, 1979 { "info", IPFY_PRI_INFO }, 1980 { "debug", IPFY_PRI_DEBUG }, 1981 { NULL, 0 }, 1982}; 1983 1984 1985 1986 1987int ipf_parsefile(fd, addfunc, iocfuncs, filename) 1988int fd; 1989addfunc_t addfunc; 1990ioctlfunc_t *iocfuncs; 1991char *filename; 1992{ 1993 FILE *fp = NULL; 1994 char *s; 1995 1996 yylineNum = 1; 1997 yysettab(ipfwords); 1998 1999 s = getenv("YYDEBUG"); 2000 if (s != NULL) 2001 yydebug = atoi(s); 2002 else 2003 yydebug = 0; 2004 2005 if (strcmp(filename, "-")) { 2006 fp = fopen(filename, "r"); 2007 if (fp == NULL) { 2008 fprintf(stderr, "fopen(%s) failed: %s\n", filename, 2009 STRERROR(errno)); 2010 return -1; 2011 } 2012 } else 2013 fp = stdin; 2014 2015 while (ipf_parsesome(fd, addfunc, iocfuncs, fp) == 1) 2016 ; 2017 if (fp != NULL) 2018 fclose(fp); 2019 return 0; 2020} 2021 2022 2023int ipf_parsesome(fd, addfunc, iocfuncs, fp) 2024int fd; 2025addfunc_t addfunc; 2026ioctlfunc_t *iocfuncs; 2027FILE *fp; 2028{ 2029 char *s; 2030 int i; 2031 2032 ipffd = fd; 2033 for (i = 0; i <= IPL_LOGMAX; i++) 2034 ipfioctls[i] = iocfuncs[i]; 2035 ipfaddfunc = addfunc; 2036 2037 if (feof(fp)) 2038 return 0; 2039 i = fgetc(fp); 2040 if (i == EOF) 2041 return 0; 2042 if (ungetc(i, fp) == 0) 2043 return 0; 2044 if (feof(fp)) 2045 return 0; 2046 s = getenv("YYDEBUG"); 2047 if (s != NULL) 2048 yydebug = atoi(s); 2049 else 2050 yydebug = 0; 2051 2052 yyin = fp; 2053 yyparse(); 2054 return 1; 2055} 2056 2057 2058static void newrule() 2059{ 2060 frentry_t *frn; 2061 2062 frn = allocfr(); 2063 for (fr = frtop; fr != NULL && fr->fr_next != NULL; fr = fr->fr_next) 2064 ; 2065 if (fr != NULL) { 2066 fr->fr_next = frn; 2067 frn->fr_pnext = &fr->fr_next; 2068 } 2069 if (frtop == NULL) { 2070 frtop = frn; 2071 frn->fr_pnext = &frtop; 2072 } 2073 fr = frn; 2074 frc = frn; 2075 fr->fr_loglevel = 0xffff; 2076 fr->fr_isc = (void *)-1; 2077 fr->fr_logtag = FR_NOLOGTAG; 2078 fr->fr_type = FR_T_NONE; 2079 fr->fr_flineno = yylineNum; 2080 2081 if (use_inet6 == 1) 2082 fr->fr_family = AF_INET6; 2083 else if (use_inet6 == -1) 2084 fr->fr_family = AF_INET; 2085 2086 nrules = 1; 2087} 2088 2089 2090static void setipftype() 2091{ 2092 for (fr = frc; fr != NULL; fr = fr->fr_next) { 2093 if (fr->fr_type == FR_T_NONE) { 2094 fr->fr_type = FR_T_IPF; 2095 fr->fr_data = (void *)calloc(sizeof(fripf_t), 1); 2096 fr->fr_dsize = sizeof(fripf_t); 2097 fr->fr_family = frc->fr_family; 2098 if (fr->fr_family == AF_INET) { 2099 fr->fr_ip.fi_v = 4; 2100 } 2101 else if (fr->fr_family == AF_INET6) { 2102 fr->fr_ip.fi_v = 6; 2103 } 2104 fr->fr_mip.fi_v = 0xf; 2105 fr->fr_ipf->fri_sifpidx = -1; 2106 fr->fr_ipf->fri_difpidx = -1; 2107 } 2108 if (fr->fr_type != FR_T_IPF) { 2109 fprintf(stderr, "IPF Type not set\n"); 2110 } 2111 } 2112} 2113 2114 2115static frentry_t *addrule() 2116{ 2117 frentry_t *f, *f1, *f2; 2118 int count; 2119 2120 for (f2 = frc; f2->fr_next != NULL; f2 = f2->fr_next) 2121 ; 2122 2123 count = nrules; 2124 f = f2; 2125 for (f1 = frc; count > 0; count--, f1 = f1->fr_next) { 2126 f->fr_next = allocfr(); 2127 if (f->fr_next == NULL) 2128 return NULL; 2129 f->fr_next->fr_pnext = &f->fr_next; 2130 added++; 2131 f = f->fr_next; 2132 *f = *f1; 2133 f->fr_next = NULL; 2134 if (f->fr_caddr != NULL) { 2135 f->fr_caddr = malloc(f->fr_dsize); 2136 bcopy(f1->fr_caddr, f->fr_caddr, f->fr_dsize); 2137 } 2138 } 2139 2140 return f2->fr_next; 2141} 2142 2143 2144static int 2145lookuphost(name, addrp) 2146 char *name; 2147 i6addr_t *addrp; 2148{ 2149 int i; 2150 2151 hashed = 0; 2152 pooled = 0; 2153 dynamic = -1; 2154 2155 for (i = 0; i < 4; i++) { 2156 if (fr->fr_ifnames[i] == -1) 2157 continue; 2158 if (strcmp(name, fr->fr_names + fr->fr_ifnames[i]) == 0) { 2159 ifpflag = FRI_DYNAMIC; 2160 dynamic = addname(&fr, name); 2161 return 1; 2162 } 2163 } 2164 2165 if (gethost(AF_INET, name, addrp) == -1) { 2166 fprintf(stderr, "unknown name \"%s\"\n", name); 2167 return -1; 2168 } 2169 return 0; 2170} 2171 2172 2173static void dobpf(v, phrase) 2174int v; 2175char *phrase; 2176{ 2177#ifdef IPFILTER_BPF 2178 struct bpf_program bpf; 2179 struct pcap *p; 2180#endif 2181 fakebpf_t *fb; 2182 u_32_t l; 2183 char *s; 2184 int i; 2185 2186 for (fr = frc; fr != NULL; fr = fr->fr_next) { 2187 if (fr->fr_type != FR_T_NONE) { 2188 fprintf(stderr, "cannot mix IPF and BPF matching\n"); 2189 return; 2190 } 2191 fr->fr_family = vtof(v); 2192 fr->fr_type = FR_T_BPFOPC; 2193 2194 if (!strncmp(phrase, "0x", 2)) { 2195 fb = malloc(sizeof(fakebpf_t)); 2196 2197 for (i = 0, s = strtok(phrase, " \r\n\t"); s != NULL; 2198 s = strtok(NULL, " \r\n\t"), i++) { 2199 fb = realloc(fb, (i / 4 + 1) * sizeof(*fb)); 2200 l = (u_32_t)strtol(s, NULL, 0); 2201 switch (i & 3) 2202 { 2203 case 0 : 2204 fb[i / 4].fb_c = l & 0xffff; 2205 break; 2206 case 1 : 2207 fb[i / 4].fb_t = l & 0xff; 2208 break; 2209 case 2 : 2210 fb[i / 4].fb_f = l & 0xff; 2211 break; 2212 case 3 : 2213 fb[i / 4].fb_k = l; 2214 break; 2215 } 2216 } 2217 if ((i & 3) != 0) { 2218 fprintf(stderr, 2219 "Odd number of bytes in BPF code\n"); 2220 exit(1); 2221 } 2222 i--; 2223 fr->fr_dsize = (i / 4 + 1) * sizeof(*fb); 2224 fr->fr_data = fb; 2225 return; 2226 } 2227 2228#ifdef IPFILTER_BPF 2229 bzero((char *)&bpf, sizeof(bpf)); 2230 p = pcap_open_dead(DLT_RAW, 1); 2231 if (!p) { 2232 fprintf(stderr, "pcap_open_dead failed\n"); 2233 return; 2234 } 2235 2236 if (pcap_compile(p, &bpf, phrase, 1, 0xffffffff)) { 2237 pcap_perror(p, "ipf"); 2238 pcap_close(p); 2239 fprintf(stderr, "pcap parsing failed (%s)\n", phrase); 2240 return; 2241 } 2242 pcap_close(p); 2243 2244 fr->fr_dsize = bpf.bf_len * sizeof(struct bpf_insn); 2245 fr->fr_data = malloc(fr->fr_dsize); 2246 bcopy((char *)bpf.bf_insns, fr->fr_data, fr->fr_dsize); 2247 if (!bpf_validate(fr->fr_data, bpf.bf_len)) { 2248 fprintf(stderr, "BPF validation failed\n"); 2249 return; 2250 } 2251#endif 2252 } 2253 2254#ifdef IPFILTER_BPF 2255 if (opts & OPT_DEBUG) 2256 bpf_dump(&bpf, 0); 2257#else 2258 fprintf(stderr, "BPF filter expressions not supported\n"); 2259 exit(1); 2260#endif 2261} 2262 2263 2264static void resetaddr() 2265{ 2266 hashed = 0; 2267 pooled = 0; 2268 dynamic = -1; 2269} 2270 2271 2272static alist_t *newalist(ptr) 2273alist_t *ptr; 2274{ 2275 alist_t *al; 2276 2277 al = malloc(sizeof(*al)); 2278 if (al == NULL) 2279 return NULL; 2280 al->al_not = 0; 2281 al->al_next = ptr; 2282 return al; 2283} 2284 2285 2286static int 2287makepool(list) 2288 alist_t *list; 2289{ 2290 ip_pool_node_t *n, *top; 2291 ip_pool_t pool; 2292 alist_t *a; 2293 int num; 2294 2295 if (list == NULL) 2296 return 0; 2297 top = calloc(1, sizeof(*top)); 2298 if (top == NULL) 2299 return 0; 2300 2301 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2302 if (use_inet6 == 1) { 2303#ifdef AF_INET6 2304 n->ipn_addr.adf_family = AF_INET6; 2305 n->ipn_addr.adf_addr = a->al_i6addr; 2306 n->ipn_addr.adf_len = offsetof(addrfamily_t, 2307 adf_addr) + 16; 2308 n->ipn_mask.adf_family = AF_INET6; 2309 n->ipn_mask.adf_addr = a->al_i6mask; 2310 n->ipn_mask.adf_len = offsetof(addrfamily_t, 2311 adf_addr) + 16; 2312 2313#endif 2314 } else { 2315 n->ipn_addr.adf_family = AF_INET; 2316 n->ipn_addr.adf_addr.in4.s_addr = a->al_1; 2317 n->ipn_addr.adf_len = offsetof(addrfamily_t, 2318 adf_addr) + 4; 2319 n->ipn_mask.adf_family = AF_INET; 2320 n->ipn_mask.adf_addr.in4.s_addr = a->al_2; 2321 n->ipn_mask.adf_len = offsetof(addrfamily_t, 2322 adf_addr) + 4; 2323 } 2324 n->ipn_info = a->al_not; 2325 if (a->al_next != NULL) { 2326 n->ipn_next = calloc(1, sizeof(*n)); 2327 n = n->ipn_next; 2328 } 2329 } 2330 2331 bzero((char *)&pool, sizeof(pool)); 2332 pool.ipo_unit = IPL_LOGIPF; 2333 pool.ipo_list = top; 2334 num = load_pool(&pool, ipfioctls[IPL_LOGLOOKUP]); 2335 2336 while ((n = top) != NULL) { 2337 top = n->ipn_next; 2338 free(n); 2339 } 2340 return num; 2341} 2342 2343 2344static u_int makehash(list) 2345alist_t *list; 2346{ 2347 iphtent_t *n, *top; 2348 iphtable_t iph; 2349 alist_t *a; 2350 int num; 2351 2352 if (list == NULL) 2353 return 0; 2354 top = calloc(1, sizeof(*top)); 2355 if (top == NULL) 2356 return 0; 2357 2358 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2359 if (a->al_family == AF_INET6) { 2360 n->ipe_family = AF_INET6; 2361 n->ipe_addr = a->al_i6addr; 2362 n->ipe_mask = a->al_i6mask; 2363 } else { 2364 n->ipe_family = AF_INET; 2365 n->ipe_addr.in4_addr = a->al_1; 2366 n->ipe_mask.in4_addr = a->al_2; 2367 } 2368 n->ipe_value = 0; 2369 if (a->al_next != NULL) { 2370 n->ipe_next = calloc(1, sizeof(*n)); 2371 n = n->ipe_next; 2372 } 2373 } 2374 2375 bzero((char *)&iph, sizeof(iph)); 2376 iph.iph_unit = IPL_LOGIPF; 2377 iph.iph_type = IPHASH_LOOKUP; 2378 *iph.iph_name = '\0'; 2379 2380 if (load_hash(&iph, top, ipfioctls[IPL_LOGLOOKUP]) == 0) 2381 sscanf(iph.iph_name, "%u", &num); 2382 else 2383 num = 0; 2384 2385 while ((n = top) != NULL) { 2386 top = n->ipe_next; 2387 free(n); 2388 } 2389 return num; 2390} 2391 2392 2393int ipf_addrule(fd, ioctlfunc, ptr) 2394int fd; 2395ioctlfunc_t ioctlfunc; 2396void *ptr; 2397{ 2398 ioctlcmd_t add, del; 2399 frentry_t *fr; 2400 ipfobj_t obj; 2401 2402 if (ptr == NULL) 2403 return 0; 2404 2405 fr = ptr; 2406 add = 0; 2407 del = 0; 2408 2409 bzero((char *)&obj, sizeof(obj)); 2410 obj.ipfo_rev = IPFILTER_VERSION; 2411 obj.ipfo_size = fr->fr_size; 2412 obj.ipfo_type = IPFOBJ_FRENTRY; 2413 obj.ipfo_ptr = ptr; 2414 2415 if ((opts & OPT_DONOTHING) != 0) 2416 fd = -1; 2417 2418 if (opts & OPT_ZERORULEST) { 2419 add = SIOCZRLST; 2420 } else if (opts & OPT_INACTIVE) { 2421 add = (u_int)fr->fr_hits ? SIOCINIFR : 2422 SIOCADIFR; 2423 del = SIOCRMIFR; 2424 } else { 2425 add = (u_int)fr->fr_hits ? SIOCINAFR : 2426 SIOCADAFR; 2427 del = SIOCRMAFR; 2428 } 2429 2430 if ((opts & OPT_OUTQUE) != 0) 2431 fr->fr_flags |= FR_OUTQUE; 2432 if (fr->fr_hits) 2433 fr->fr_hits--; 2434 if ((opts & OPT_VERBOSE) != 0) 2435 printfr(fr, ioctlfunc); 2436 2437 if ((opts & OPT_DEBUG) != 0) { 2438 binprint(fr, sizeof(*fr)); 2439 if (fr->fr_data != NULL) 2440 binprint(fr->fr_data, fr->fr_dsize); 2441 } 2442 2443 if ((opts & OPT_ZERORULEST) != 0) { 2444 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2445 if ((opts & OPT_DONOTHING) == 0) { 2446 char msg[80]; 2447 2448 sprintf(msg, "%d:ioctl(zero rule)", 2449 fr->fr_flineno); 2450 return ipf_perror_fd(fd, ioctlfunc, msg); 2451 } 2452 } else { 2453#ifdef USE_QUAD_T 2454 printf("hits %qd bytes %qd ", 2455 (long long)fr->fr_hits, 2456 (long long)fr->fr_bytes); 2457#else 2458 printf("hits %ld bytes %ld ", 2459 fr->fr_hits, fr->fr_bytes); 2460#endif 2461 printfr(fr, ioctlfunc); 2462 } 2463 } else if ((opts & OPT_REMOVE) != 0) { 2464 if ((*ioctlfunc)(fd, del, (void *)&obj) == -1) { 2465 if ((opts & OPT_DONOTHING) == 0) { 2466 char msg[80]; 2467 2468 sprintf(msg, "%d:ioctl(delete rule)", 2469 fr->fr_flineno); 2470 return ipf_perror_fd(fd, ioctlfunc, msg); 2471 } 2472 } 2473 } else { 2474 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2475 if ((opts & OPT_DONOTHING) == 0) { 2476 char msg[80]; 2477 2478 sprintf(msg, "%d:ioctl(add/insert rule)", 2479 fr->fr_flineno); 2480 return ipf_perror_fd(fd, ioctlfunc, msg); 2481 } 2482 } 2483 } 2484 return 0; 2485} 2486 2487static void setsyslog() 2488{ 2489 yysetdict(logwords); 2490 yybreakondot = 1; 2491} 2492 2493 2494static void unsetsyslog() 2495{ 2496 yyresetdict(); 2497 yybreakondot = 0; 2498} 2499 2500 2501static void fillgroup(fr) 2502frentry_t *fr; 2503{ 2504 frentry_t *f; 2505 2506 for (f = frold; f != NULL; f = f->fr_next) { 2507 if (f->fr_grhead == -1 && fr->fr_group == -1) 2508 break; 2509 if (f->fr_grhead == -1 || fr->fr_group == -1) 2510 continue; 2511 if (strcmp(f->fr_names + f->fr_grhead, 2512 fr->fr_names + fr->fr_group) == 0) 2513 break; 2514 } 2515 2516 if (f == NULL) 2517 return; 2518 2519 /* 2520 * Only copy down matching fields if the rules are of the same type 2521 * and are of ipf type. The only fields that are copied are those 2522 * that impact the rule parsing itself, eg. need for knowing what the 2523 * protocol should be for rules with port comparisons in them. 2524 */ 2525 if (f->fr_type != fr->fr_type || f->fr_type != FR_T_IPF) 2526 return; 2527 2528 if (fr->fr_family == 0 && f->fr_family != 0) 2529 fr->fr_family = f->fr_family; 2530 2531 if (fr->fr_mproto == 0 && f->fr_mproto != 0) 2532 fr->fr_mproto = f->fr_mproto; 2533 if (fr->fr_proto == 0 && f->fr_proto != 0) 2534 fr->fr_proto = f->fr_proto; 2535 2536 if ((fr->fr_mproto == 0) && ((fr->fr_flx & FI_TCPUDP) == 0) && 2537 ((f->fr_flx & FI_TCPUDP) != 0)) { 2538 fr->fr_flx |= FI_TCPUDP; 2539 fr->fr_mflx |= FI_TCPUDP; 2540 } 2541} 2542 2543 2544static void doipfexpr(line) 2545char *line; 2546{ 2547 int *array; 2548 char *error; 2549 2550 array = parseipfexpr(line, &error); 2551 if (array == NULL) { 2552 fprintf(stderr, "%s:", error); 2553 yyerror("error parsing ipf matching expression"); 2554 return; 2555 } 2556 2557 fr->fr_type = FR_T_IPFEXPR; 2558 fr->fr_data = array; 2559 fr->fr_dsize = array[0] * sizeof(*array); 2560} 2561 2562 2563static void do_tuneint(varname, value) 2564char *varname; 2565int value; 2566{ 2567 char buffer[80]; 2568 2569 strncpy(buffer, varname, 60); 2570 buffer[59] = '\0'; 2571 strcat(buffer, "="); 2572 sprintf(buffer, "%u", value); 2573 ipf_dotuning(ipffd, buffer, ioctl); 2574} 2575 2576 2577static void do_tunestr(varname, value) 2578char *varname, *value; 2579{ 2580 2581 if (!strcasecmp(value, "true")) { 2582 do_tuneint(varname, 1); 2583 } else if (!strcasecmp(value, "false")) { 2584 do_tuneint(varname, 0); 2585 } else { 2586 yyerror("did not find true/false where expected"); 2587 } 2588} 2589 2590 2591static void setifname(frp, idx, name) 2592frentry_t **frp; 2593int idx; 2594char *name; 2595{ 2596 int pos; 2597 2598 pos = addname(frp, name); 2599 if (pos == -1) 2600 return; 2601 (*frp)->fr_ifnames[idx] = pos; 2602} 2603 2604 2605static int addname(frp, name) 2606frentry_t **frp; 2607char *name; 2608{ 2609 frentry_t *f; 2610 int nlen; 2611 int pos; 2612 2613 nlen = strlen(name) + 1; 2614 /* 2615 * realloc is harder to use here because the end of the structure 2616 * needs to be zero'd, else it gets junk bytes. 2617 */ 2618 f = calloc(1, (*frp)->fr_size + nlen); 2619 memcpy(f, *frp, (*frp)->fr_size); 2620 free(*frp); 2621 if (*frp == frc) 2622 frc = f; 2623 *frp = f; 2624 if (f == NULL) 2625 return -1; 2626 if (f->fr_pnext != NULL) 2627 *f->fr_pnext = f; 2628 f->fr_size += nlen; 2629 pos = f->fr_namelen; 2630 f->fr_namelen += nlen; 2631 strcpy(f->fr_names + pos, name); 2632 f->fr_names[f->fr_namelen] = '\0'; 2633 return pos; 2634} 2635 2636 2637static frentry_t *allocfr() 2638{ 2639 frentry_t *fr; 2640 2641 fr = calloc(1, sizeof(*fr)); 2642 if (fr != NULL) { 2643 fr->fr_size = sizeof(*fr); 2644 fr->fr_comment = -1; 2645 fr->fr_group = -1; 2646 fr->fr_grhead = -1; 2647 fr->fr_icmphead = -1; 2648 fr->fr_ifnames[0] = -1; 2649 fr->fr_ifnames[1] = -1; 2650 fr->fr_ifnames[2] = -1; 2651 fr->fr_ifnames[3] = -1; 2652 fr->fr_tif.fd_name = -1; 2653 fr->fr_rif.fd_name = -1; 2654 fr->fr_dif.fd_name = -1; 2655 } 2656 return fr; 2657} 2658 2659 2660static void setgroup(frp, name) 2661frentry_t **frp; 2662char *name; 2663{ 2664 int pos; 2665 2666 pos = addname(frp, name); 2667 if (pos == -1) 2668 return; 2669 (*frp)->fr_group = pos; 2670} 2671 2672 2673static void setgrhead(frp, name) 2674frentry_t **frp; 2675char *name; 2676{ 2677 int pos; 2678 2679 pos = addname(frp, name); 2680 if (pos == -1) 2681 return; 2682 (*frp)->fr_grhead = pos; 2683} 2684 2685 2686static void seticmphead(frp, name) 2687frentry_t **frp; 2688char *name; 2689{ 2690 int pos; 2691 2692 pos = addname(frp, name); 2693 if (pos == -1) 2694 return; 2695 (*frp)->fr_icmphead = pos; 2696} 2697 2698 2699static void 2700build_dstaddr_af(fp, ptr) 2701 frentry_t *fp; 2702 void *ptr; 2703{ 2704 struct ipp_s *ipp = ptr; 2705 frentry_t *f = fp; 2706 2707 if (f->fr_family != AF_UNSPEC && ipp->f == AF_UNSPEC) { 2708 ipp->f = f->fr_family; 2709 ipp->v = f->fr_ip.fi_v; 2710 } 2711 if (ipp->f == AF_INET) 2712 ipp->v = 4; 2713 else if (ipp->f == AF_INET6) 2714 ipp->v = 6; 2715 2716 for (; f != NULL; f = f->fr_next) { 2717 f->fr_ip.fi_dst = ipp->a; 2718 f->fr_mip.fi_dst = ipp->m; 2719 f->fr_family = ipp->f; 2720 f->fr_ip.fi_v = ipp->v; 2721 f->fr_mip.fi_v = 0xf; 2722 f->fr_datype = ipp->type; 2723 if (ipp->ifpos != -1) 2724 f->fr_ipf->fri_difpidx = ipp->ifpos; 2725 } 2726 fr = NULL; 2727} 2728 2729 2730static void 2731build_srcaddr_af(fp, ptr) 2732 frentry_t *fp; 2733 void *ptr; 2734{ 2735 struct ipp_s *ipp = ptr; 2736 frentry_t *f = fp; 2737 2738 if (f->fr_family != AF_UNSPEC && ipp->f == AF_UNSPEC) { 2739 ipp->f = f->fr_family; 2740 ipp->v = f->fr_ip.fi_v; 2741 } 2742 if (ipp->f == AF_INET) 2743 ipp->v = 4; 2744 else if (ipp->f == AF_INET6) 2745 ipp->v = 6; 2746 2747 for (; f != NULL; f = f->fr_next) { 2748 f->fr_ip.fi_src = ipp->a; 2749 f->fr_mip.fi_src = ipp->m; 2750 f->fr_family = ipp->f; 2751 f->fr_ip.fi_v = ipp->v; 2752 f->fr_mip.fi_v = 0xf; 2753 f->fr_satype = ipp->type; 2754 f->fr_ipf->fri_sifpidx = ipp->ifpos; 2755 } 2756 fr = NULL; 2757} 2758