1 %{ 2 /* 3 * Copyright (C) 2003 by Darren Reed. 4 * 5 * See the IPFILTER.LICENCE file for details on licencing. 6 * 7 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 8 * Use is subject to license terms. 9 */ 10 11 #pragma ident "%Z%%M% %I% %E% SMI" 12 13 #include "ipf.h" 14 #include <sys/ioctl.h> 15 #include <syslog.h> 16 #ifdef IPFILTER_BPF 17 # include "pcap-bpf.h" 18 # define _NET_BPF_H_ 19 # include <pcap.h> 20 #endif 21 #include "netinet/ip_pool.h" 22 #include "netinet/ip_htable.h" 23 #include "netinet/ipl.h" 24 #include "ipf_l.h" 25 26 #define YYDEBUG 1 27 #define DOALL(x) for (fr = frc; fr != NULL; fr = fr->fr_next) { x } 28 #define DOREM(x) for (; fr != NULL; fr = fr->fr_next) { x } 29 30 #define OPTION_LOG 0x1 31 #define OPTION_QUICK 0x2 32 #define OPTION_DUP 0x4 33 #define OPTION_PROUTE 0x8 34 #define OPTION_ON 0x10 35 #define OPTION_REPLYTO 0x20 36 #define OPTION_FROUTE 0x40 37 38 extern void yyerror __P((char *)); 39 extern int yyparse __P((void)); 40 extern int yylex __P((void)); 41 extern int yydebug; 42 extern FILE *yyin; 43 extern int yylineNum; 44 45 static void newrule __P((void)); 46 static void setipftype __P((void)); 47 static u_32_t lookuphost __P((char *)); 48 static void dobpf __P((int, char *)); 49 static void resetaddr __P((void)); 50 static struct alist_s *newalist __P((struct alist_s *)); 51 static u_int makehash __P((struct alist_s *)); 52 static int makepool __P((struct alist_s *)); 53 static frentry_t *addrule __P((void)); 54 static void setsyslog __P((void)); 55 static void unsetsyslog __P((void)); 56 static void fillgroup __P((frentry_t *)); 57 58 frentry_t *fr = NULL, *frc = NULL, *frtop = NULL, *frold = NULL; 59 60 static int ifpflag = 0; 61 static int nowith = 0; 62 static int dynamic = -1; 63 static int pooled = 0; 64 static int hashed = 0; 65 static int nrules = 0; 66 static int newlist = 0; 67 static int added = 0; 68 static int ipffd = -1; 69 static int ruleopts = 0; 70 static int *yycont = 0; 71 static ioctlfunc_t ipfioctl[IPL_LOGSIZE]; 72 static addfunc_t ipfaddfunc = NULL; 73 static struct wordtab ipfwords[95]; 74 static struct wordtab addrwords[4]; 75 static struct wordtab maskwords[5]; 76 static struct wordtab icmpcodewords[17]; 77 static struct wordtab icmptypewords[16]; 78 static struct wordtab ipv4optwords[25]; 79 static struct wordtab ipv4secwords[9]; 80 static struct wordtab ipv6optwords[8]; 81 static struct wordtab logwords[33]; 82 static int set_ipv6_addr = 0; 83 84 %} 85 %union { 86 char *str; 87 u_32_t num; 88 struct in_addr ipa; 89 frentry_t fr; 90 frtuc_t *frt; 91 struct alist_s *alist; 92 u_short port; 93 struct { 94 u_short p1; 95 u_short p2; 96 int pc; 97 } pc; 98 struct { 99 union i6addr a; 100 union i6addr m; 101 } ipp; 102 union i6addr ip6; 103 }; 104 105 %type <port> portnum 106 %type <num> facility priority icmpcode seclevel secname icmptype 107 %type <num> opt compare range opttype flagset optlist ipv6hdrlist ipv6hdr 108 %type <num> portc porteq 109 %type <ipa> hostname ipv4 ipv4mask ipv4_16 ipv4_24 110 %type <ip6> ipv6mask 111 %type <ipp> addr ipaddr 112 %type <str> servicename name interfacename 113 %type <pc> portrange portcomp 114 %type <alist> addrlist poollist 115 116 %token <num> YY_NUMBER YY_HEX 117 %token <str> YY_STR 118 %token YY_COMMENT 119 %token YY_CMP_EQ YY_CMP_NE YY_CMP_LE YY_CMP_GE YY_CMP_LT YY_CMP_GT 120 %token YY_RANGE_OUT YY_RANGE_IN 121 %token <ip6> YY_IPV6 122 123 %token IPFY_PASS IPFY_BLOCK IPFY_COUNT IPFY_CALL 124 %token IPFY_RETICMP IPFY_RETRST IPFY_RETICMPASDST 125 %token IPFY_IN IPFY_OUT 126 %token IPFY_QUICK IPFY_ON IPFY_OUTVIA IPFY_INVIA 127 %token IPFY_DUPTO IPFY_TO IPFY_FROUTE IPFY_REPLY_TO IPFY_ROUTETO 128 %token IPFY_TOS IPFY_TTL IPFY_PROTO 129 %token IPFY_HEAD IPFY_GROUP 130 %token IPFY_AUTH IPFY_PREAUTH 131 %token IPFY_LOG IPFY_BODY IPFY_FIRST IPFY_LEVEL IPFY_ORBLOCK 132 %token IPFY_LOGTAG IPFY_MATCHTAG IPFY_SETTAG IPFY_SKIP 133 %token IPFY_FROM IPFY_ALL IPFY_ANY IPFY_BPFV4 IPFY_BPFV6 IPFY_POOL IPFY_HASH 134 %token IPFY_PPS 135 %token IPFY_ESP IPFY_AH 136 %token IPFY_WITH IPFY_AND IPFY_NOT IPFY_NO IPFY_OPT 137 %token IPFY_TCPUDP IPFY_TCP IPFY_UDP 138 %token IPFY_FLAGS IPFY_MULTICAST 139 %token IPFY_MASK IPFY_BROADCAST IPFY_NETWORK IPFY_NETMASKED IPFY_PEER 140 %token IPFY_PORT 141 %token IPFY_NOW 142 %token IPFY_ICMP IPFY_ICMPTYPE IPFY_ICMPCODE 143 %token IPFY_IPOPTS IPFY_SHORT IPFY_NAT IPFY_BADSRC IPFY_LOWTTL IPFY_FRAG 144 %token IPFY_MBCAST IPFY_BAD IPFY_BADNAT IPFY_OOW IPFY_NEWISN IPFY_NOICMPERR 145 %token IPFY_KEEP IPFY_STATE IPFY_FRAGS IPFY_LIMIT IPFY_STRICT IPFY_AGE 146 %token IPFY_SYNC IPFY_FRAGBODY 147 %token IPFY_IPOPT_NOP IPFY_IPOPT_RR IPFY_IPOPT_ZSU IPFY_IPOPT_MTUP 148 %token IPFY_IPOPT_MTUR IPFY_IPOPT_ENCODE IPFY_IPOPT_TS IPFY_IPOPT_TR 149 %token IPFY_IPOPT_SEC IPFY_IPOPT_LSRR IPFY_IPOPT_ESEC IPFY_IPOPT_CIPSO 150 %token IPFY_IPOPT_SATID IPFY_IPOPT_SSRR IPFY_IPOPT_ADDEXT IPFY_IPOPT_VISA 151 %token IPFY_IPOPT_IMITD IPFY_IPOPT_EIP IPFY_IPOPT_FINN IPFY_IPOPT_DPS 152 %token IPFY_IPOPT_SDB IPFY_IPOPT_NSAPA IPFY_IPOPT_RTRALRT IPFY_IPOPT_UMP 153 %token IPFY_SECCLASS IPFY_SEC_UNC IPFY_SEC_CONF IPFY_SEC_RSV1 IPFY_SEC_RSV2 154 %token IPFY_SEC_RSV4 IPFY_SEC_SEC IPFY_SEC_TS IPFY_SEC_RSV3 155 156 %token IPF6_V6HDRS IPFY_IPV6OPT IPFY_IPV6OPT_DSTOPTS IPFY_IPV6OPT_HOPOPTS 157 %token IPFY_IPV6OPT_IPV6 IPFY_IPV6OPT_NONE IPFY_IPV6OPT_ROUTING 158 159 %token IPFY_ICMPT_UNR IPFY_ICMPT_ECHO IPFY_ICMPT_ECHOR IPFY_ICMPT_SQUENCH 160 %token IPFY_ICMPT_REDIR IPFY_ICMPT_TIMEX IPFY_ICMPT_PARAMP IPFY_ICMPT_TIMEST 161 %token IPFY_ICMPT_TIMESTREP IPFY_ICMPT_INFOREQ IPFY_ICMPT_INFOREP 162 %token IPFY_ICMPT_MASKREQ IPFY_ICMPT_MASKREP IPFY_ICMPT_ROUTERAD 163 %token IPFY_ICMPT_ROUTERSOL 164 165 %token IPFY_ICMPC_NETUNR IPFY_ICMPC_HSTUNR IPFY_ICMPC_PROUNR IPFY_ICMPC_PORUNR 166 %token IPFY_ICMPC_NEEDF IPFY_ICMPC_SRCFAIL IPFY_ICMPC_NETUNK IPFY_ICMPC_HSTUNK 167 %token IPFY_ICMPC_ISOLATE IPFY_ICMPC_NETPRO IPFY_ICMPC_HSTPRO 168 %token IPFY_ICMPC_NETTOS IPFY_ICMPC_HSTTOS IPFY_ICMPC_FLTPRO IPFY_ICMPC_HSTPRE 169 %token IPFY_ICMPC_CUTPRE 170 171 %token IPFY_FAC_KERN IPFY_FAC_USER IPFY_FAC_MAIL IPFY_FAC_DAEMON IPFY_FAC_AUTH 172 %token IPFY_FAC_SYSLOG IPFY_FAC_LPR IPFY_FAC_NEWS IPFY_FAC_UUCP IPFY_FAC_CRON 173 %token IPFY_FAC_LOCAL0 IPFY_FAC_LOCAL1 IPFY_FAC_LOCAL2 IPFY_FAC_LOCAL3 174 %token IPFY_FAC_LOCAL4 IPFY_FAC_LOCAL5 IPFY_FAC_LOCAL6 IPFY_FAC_LOCAL7 175 %token IPFY_FAC_SECURITY IPFY_FAC_FTP IPFY_FAC_AUTHPRIV IPFY_FAC_AUDIT 176 %token IPFY_FAC_LFMT IPFY_FAC_CONSOLE 177 178 %token IPFY_PRI_EMERG IPFY_PRI_ALERT IPFY_PRI_CRIT IPFY_PRI_ERR IPFY_PRI_WARN 179 %token IPFY_PRI_NOTICE IPFY_PRI_INFO IPFY_PRI_DEBUG 180 %% 181 file: line 182 | assign 183 | file line 184 | file assign 185 ; 186 187 line: xx rule { while ((fr = frtop) != NULL) { 188 frtop = fr->fr_next; 189 fr->fr_next = NULL; 190 (*ipfaddfunc)(ipffd, ipfioctl[IPL_LOGIPF], fr); 191 fr->fr_next = frold; 192 frold = fr; 193 } 194 resetlexer(); 195 } 196 | YY_COMMENT 197 ; 198 199 xx: { newrule(); } 200 ; 201 202 assign: YY_STR assigning YY_STR ';' { set_variable($1, $3); 203 resetlexer(); 204 free($1); 205 free($3); 206 } 207 ; 208 209 assigning: 210 '=' { yyvarnext = 1; } 211 ; 212 213 rule: inrule eol 214 | outrule eol 215 ; 216 217 eol: | ';' 218 ; 219 220 inrule: 221 rulehead markin { ruleopts = 0; } inopts rulemain ruletail intag ruletail2 222 ; 223 224 outrule: 225 rulehead markout { ruleopts = 0; } outopts rulemain ruletail outtag ruletail2 226 ; 227 228 rulehead: 229 collection action 230 | insert collection action 231 ; 232 233 markin: IPFY_IN { fr->fr_flags |= FR_INQUE; } 234 ; 235 236 markout: 237 IPFY_OUT { fr->fr_flags |= FR_OUTQUE; } 238 ; 239 240 rulemain: 241 ipfrule 242 | bpfrule 243 ; 244 245 ipfrule: 246 tos ttl proto ip 247 ; 248 249 bpfrule: 250 IPFY_BPFV4 '{' YY_STR '}' { dobpf(4, $3); free($3); } 251 | IPFY_BPFV6 '{' YY_STR '}' { dobpf(6, $3); free($3); } 252 ; 253 254 ruletail: 255 with keep head group 256 ; 257 258 ruletail2: 259 pps age new 260 ; 261 262 intag: settagin matchtagin 263 ; 264 265 outtag: settagout matchtagout 266 ; 267 268 insert: 269 '@' YY_NUMBER { fr->fr_hits = (U_QUAD_T)$2 + 1; } 270 ; 271 272 collection: 273 | YY_NUMBER { fr->fr_collect = $1; } 274 ; 275 276 action: block 277 | IPFY_PASS { fr->fr_flags |= FR_PASS; } 278 | log 279 | IPFY_COUNT { fr->fr_flags |= FR_ACCOUNT; } 280 | auth 281 | IPFY_SKIP YY_NUMBER { fr->fr_flags |= FR_SKIP; 282 fr->fr_arg = $2; } 283 | IPFY_CALL func 284 | IPFY_CALL IPFY_NOW func { fr->fr_flags |= FR_CALLNOW; } 285 ; 286 287 block: blocked 288 | blocked blockreturn 289 ; 290 291 blocked: 292 IPFY_BLOCK { fr->fr_flags = FR_BLOCK; } 293 ; 294 blockreturn: 295 IPFY_RETICMP { fr->fr_flags |= FR_RETICMP; } 296 | IPFY_RETICMP returncode { fr->fr_flags |= FR_RETICMP; } 297 | IPFY_RETICMPASDST { fr->fr_flags |= FR_FAKEICMP; } 298 | IPFY_RETICMPASDST returncode { fr->fr_flags |= FR_FAKEICMP; } 299 | IPFY_RETRST { fr->fr_flags |= FR_RETRST; } 300 ; 301 302 log: IPFY_LOG { fr->fr_flags |= FR_LOG; } 303 | IPFY_LOG logoptions { fr->fr_flags |= FR_LOG; } 304 ; 305 306 auth: IPFY_AUTH { fr->fr_flags |= FR_AUTH; } 307 | IPFY_AUTH IPFY_RETRST { fr->fr_flags |= (FR_AUTH|FR_RETRST);} 308 | IPFY_PREAUTH { fr->fr_flags |= FR_PREAUTH; } 309 ; 310 311 func: YY_STR '/' YY_NUMBER { fr->fr_func = nametokva($1, 312 ipfioctl[IPL_LOGIPF]); 313 fr->fr_arg = $3; 314 free($1); } 315 ; 316 317 inopts: 318 | inopts inopt 319 ; 320 321 inopt: 322 logopt 323 { 324 if ( ruleopts & OPTION_LOG ) 325 yyerror("Duplicate log option"); 326 ruleopts |= OPTION_LOG; 327 } 328 | quick 329 { 330 if ( ruleopts & OPTION_QUICK ) 331 yyerror("Duplicate quick option"); 332 ruleopts |= OPTION_QUICK; 333 } 334 | on 335 { 336 if ( ruleopts & OPTION_ON ) 337 yyerror("Duplicate on option"); 338 ruleopts |= OPTION_ON; 339 } 340 | dup 341 { 342 if ( ruleopts & OPTION_DUP ) 343 yyerror("Duplicate dup option"); 344 ruleopts |= OPTION_DUP; 345 } 346 | froute 347 { 348 if ( ruleopts & OPTION_FROUTE ) 349 yyerror("Duplicate froute option"); 350 ruleopts |= OPTION_FROUTE; 351 } 352 | proute 353 { 354 if ( ruleopts & OPTION_PROUTE ) 355 yyerror("Duplicate proute option"); 356 ruleopts |= OPTION_PROUTE; 357 } 358 | replyto 359 { 360 if ( ruleopts & OPTION_REPLYTO ) 361 yyerror("Duplicate replyto option"); 362 ruleopts |= OPTION_REPLYTO; 363 } 364 ; 365 366 outopts: 367 | outopts outopt 368 ; 369 370 outopt: 371 logopt 372 { 373 if ( ruleopts & OPTION_LOG ) 374 yyerror("Duplicate log option"); 375 ruleopts |= OPTION_LOG; 376 } 377 | quick 378 { 379 if ( ruleopts & OPTION_QUICK ) 380 yyerror("Duplicate quick option"); 381 ruleopts |= OPTION_QUICK; 382 } 383 | on 384 { 385 if ( ruleopts & OPTION_ON ) 386 yyerror("Duplicate on option"); 387 ruleopts |= OPTION_ON; 388 } 389 | dup 390 { 391 if ( ruleopts & OPTION_DUP ) 392 yyerror("Duplicate dup option"); 393 ruleopts |= OPTION_DUP; 394 } 395 | proute 396 { 397 if ( ruleopts & OPTION_PROUTE ) 398 yyerror("Duplicate proute option"); 399 ruleopts |= OPTION_PROUTE; 400 } 401 | replyto 402 { 403 if ( ruleopts & OPTION_REPLYTO ) 404 yyerror("Duplicate replyto option"); 405 ruleopts |= OPTION_REPLYTO; 406 } 407 ; 408 409 tos: | settos YY_NUMBER { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 410 | settos YY_HEX { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 411 | settos lstart toslist lend 412 ; 413 414 settos: IPFY_TOS { setipftype(); } 415 ; 416 417 toslist: 418 YY_NUMBER { DOALL(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 419 | YY_HEX { DOREM(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 420 | toslist lmore YY_NUMBER 421 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 422 | toslist lmore YY_HEX 423 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 424 ; 425 426 ttl: | setttl YY_NUMBER 427 { DOALL(fr->fr_ttl = $2; fr->fr_mttl = 0xff;) } 428 | setttl lstart ttllist lend 429 ; 430 431 lstart: '(' { newlist = 1; fr = frc; added = 0; } 432 ; 433 434 lend: ')' { nrules += added; } 435 ; 436 437 lmore: lanother { if (newlist == 1) { 438 newlist = 0; 439 } 440 fr = addrule(); 441 if (yycont != NULL) 442 *yycont = 1; 443 } 444 ; 445 446 lanother: 447 | ',' 448 ; 449 450 setttl: IPFY_TTL { setipftype(); } 451 ; 452 453 ttllist: 454 YY_NUMBER { DOREM(fr->fr_ttl = $1; fr->fr_mttl = 0xff;) } 455 | ttllist lmore YY_NUMBER 456 { DOREM(fr->fr_ttl = $3; fr->fr_mttl = 0xff;) } 457 ; 458 459 proto: | protox protocol { yyresetdict(); } 460 ; 461 462 protox: IPFY_PROTO { setipftype(); 463 fr = frc; 464 yysetdict(NULL); } 465 ; 466 467 ip: srcdst flags icmp 468 ; 469 470 group: | IPFY_GROUP YY_STR { DOALL(strncpy(fr->fr_group, $2, \ 471 FR_GROUPLEN); \ 472 fillgroup(fr);); 473 free($2); } 474 | IPFY_GROUP YY_NUMBER { DOALL(sprintf(fr->fr_group, "%d", \ 475 $2); \ 476 fillgroup(fr);) } 477 ; 478 479 head: | IPFY_HEAD YY_STR { DOALL(strncpy(fr->fr_grhead, $2, \ 480 FR_GROUPLEN);); 481 free($2); } 482 | IPFY_HEAD YY_NUMBER { DOALL(sprintf(fr->fr_grhead, "%d", \ 483 $2);) } 484 ; 485 486 settagin: 487 | IPFY_SETTAG '(' taginlist ')' 488 ; 489 490 taginlist: 491 taginspec 492 | taginlist ',' taginspec 493 ; 494 495 taginspec: 496 logtag 497 |nattag 498 ; 499 500 nattag: IPFY_NAT '=' YY_STR { DOALL(strncpy(fr->fr_nattag.ipt_tag,\ 501 $3, IPFTAG_LEN);); 502 free($3); } 503 | IPFY_NAT '=' YY_NUMBER { DOALL(sprintf(fr->fr_nattag.ipt_tag,\ 504 "%d", $3 & 0xffffffff);) } 505 ; 506 507 logtag: IPFY_LOG '=' YY_NUMBER { DOALL(fr->fr_logtag = $3;) } 508 ; 509 510 settagout: 511 | IPFY_SETTAG '(' tagoutlist ')' 512 ; 513 514 tagoutlist: 515 tagoutspec 516 | tagoutlist ',' tagoutspec 517 ; 518 519 tagoutspec: 520 logtag 521 | nattag 522 ; 523 524 matchtagin: 525 | IPFY_MATCHTAG '(' tagoutlist ')' 526 ; 527 528 matchtagout: 529 | IPFY_MATCHTAG '(' taginlist ')' 530 ; 531 532 pps: | IPFY_PPS YY_NUMBER { DOALL(fr->fr_pps = $2;) } 533 ; 534 535 new: | savegroup file restoregroup 536 ; 537 538 savegroup: 539 '{' 540 ; 541 542 restoregroup: 543 '}' 544 ; 545 546 logopt: log 547 ; 548 549 quick: 550 IPFY_QUICK { fr->fr_flags |= FR_QUICK; } 551 ; 552 553 on: IPFY_ON onname 554 | IPFY_ON onname IPFY_INVIA vianame 555 | IPFY_ON onname IPFY_OUTVIA vianame 556 ; 557 558 onname: interfacename 559 { strncpy(fr->fr_ifnames[0], $1, sizeof(fr->fr_ifnames[0])); 560 free($1); 561 } 562 | interfacename ',' interfacename 563 { strncpy(fr->fr_ifnames[0], $1, sizeof(fr->fr_ifnames[0])); 564 free($1); 565 strncpy(fr->fr_ifnames[1], $3, sizeof(fr->fr_ifnames[1])); 566 free($3); 567 } 568 ; 569 570 vianame: 571 name 572 { strncpy(fr->fr_ifnames[2], $1, sizeof(fr->fr_ifnames[2])); 573 free($1); 574 } 575 | name ',' name 576 { strncpy(fr->fr_ifnames[2], $1, sizeof(fr->fr_ifnames[2])); 577 free($1); 578 strncpy(fr->fr_ifnames[3], $3, sizeof(fr->fr_ifnames[3])); 579 free($3); 580 } 581 ; 582 583 dup: IPFY_DUPTO name 584 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 585 free($2); 586 } 587 | IPFY_DUPTO name duptoseparator hostname 588 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 589 fr->fr_dif.fd_ip = $4; 590 yyexpectaddr = 0; 591 free($2); 592 } 593 | IPFY_DUPTO name duptoseparator YY_IPV6 594 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 595 bcopy(&$4, &fr->fr_dif.fd_ip6, sizeof(fr->fr_dif.fd_ip6)); 596 yyexpectaddr = 0; 597 free($2); 598 } 599 ; 600 601 duptoseparator: 602 ':' { yyexpectaddr = 1; yycont = &yyexpectaddr; resetaddr(); } 603 ; 604 605 froute: IPFY_FROUTE { fr->fr_flags |= FR_FASTROUTE; } 606 ; 607 608 proute: routeto name 609 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 610 free($2); 611 } 612 | routeto name duptoseparator hostname 613 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 614 fr->fr_tif.fd_ip = $4; 615 yyexpectaddr = 0; 616 free($2); 617 } 618 | routeto name duptoseparator YY_IPV6 619 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 620 bcopy(&$4, &fr->fr_tif.fd_ip6, sizeof(fr->fr_tif.fd_ip6)); 621 yyexpectaddr = 0; 622 free($2); 623 } 624 ; 625 626 routeto: 627 IPFY_TO 628 | IPFY_ROUTETO 629 ; 630 631 replyto: 632 IPFY_REPLY_TO name 633 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 634 free($2); 635 } 636 | IPFY_REPLY_TO name duptoseparator hostname 637 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 638 fr->fr_rif.fd_ip = $4; 639 free($2); 640 } 641 ; 642 643 logoptions: 644 logoption 645 | logoptions logoption 646 ; 647 648 logoption: 649 IPFY_BODY { fr->fr_flags |= FR_LOGBODY; } 650 | IPFY_FIRST { fr->fr_flags |= FR_LOGFIRST; } 651 | IPFY_ORBLOCK { fr->fr_flags |= FR_LOGORBLOCK; } 652 | level loglevel { unsetsyslog(); } 653 ; 654 655 returncode: 656 starticmpcode icmpcode ')' { fr->fr_icode = $2; yyresetdict(); } 657 ; 658 659 starticmpcode: 660 '(' { yysetdict(icmpcodewords); } 661 ; 662 663 srcdst: | IPFY_ALL 664 | fromto 665 ; 666 667 protocol: 668 YY_NUMBER { DOREM(fr->fr_proto = $1; \ 669 fr->fr_mproto = 0xff;) } 670 | YY_STR { if (!strcmp($1, "tcp-udp")) { 671 DOREM(fr->fr_flx |= FI_TCPUDP; \ 672 fr->fr_mflx |= FI_TCPUDP;) 673 } else { 674 int p = getproto($1); 675 if (p == -1) 676 yyerror("protocol unknown"); 677 DOREM(fr->fr_proto = p; \ 678 fr->fr_mproto = 0xff;) 679 } 680 free($1); 681 } 682 | YY_STR nextstring YY_STR 683 { if (!strcmp($1, "tcp") && 684 !strcmp($3, "udp")) { 685 DOREM(fr->fr_flx |= FI_TCPUDP; \ 686 fr->fr_mflx |= FI_TCPUDP;) 687 } else 688 YYERROR; 689 free($1); 690 free($3); 691 } 692 ; 693 694 nextstring: 695 '/' { yysetdict(NULL); } 696 ; 697 698 fromto: from srcobject to dstobject { yyexpectaddr = 0; yycont = NULL; } 699 | to dstobject { yyexpectaddr = 0; yycont = NULL; } 700 | from srcobject { yyexpectaddr = 0; yycont = NULL; } 701 ; 702 703 from: IPFY_FROM { setipftype(); 704 if (fr == NULL) 705 fr = frc; 706 yyexpectaddr = 1; 707 if (yydebug) 708 printf("set yyexpectaddr\n"); 709 yycont = &yyexpectaddr; 710 yysetdict(addrwords); 711 resetaddr(); } 712 ; 713 714 to: IPFY_TO { if (fr == NULL) 715 fr = frc; 716 yyexpectaddr = 1; 717 if (yydebug) 718 printf("set yyexpectaddr\n"); 719 yycont = &yyexpectaddr; 720 yysetdict(addrwords); 721 resetaddr(); } 722 ; 723 724 with: | andwith withlist 725 ; 726 727 andwith: 728 IPFY_WITH { nowith = 0; setipftype(); } 729 | IPFY_AND { nowith = 0; setipftype(); } 730 ; 731 732 flags: | startflags flagset 733 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 734 | startflags flagset '/' flagset 735 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 736 | startflags '/' flagset 737 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 738 | startflags YY_NUMBER 739 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 740 | startflags '/' YY_NUMBER 741 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 742 | startflags YY_NUMBER '/' YY_NUMBER 743 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 744 | startflags flagset '/' YY_NUMBER 745 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 746 | startflags YY_NUMBER '/' flagset 747 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 748 ; 749 750 startflags: 751 IPFY_FLAGS { if (frc->fr_type != FR_T_IPF) 752 yyerror("flags with non-ipf type rule"); 753 if (frc->fr_proto != IPPROTO_TCP) 754 yyerror("flags with non-TCP rule"); 755 } 756 ; 757 758 flagset: 759 YY_STR { $$ = tcpflags($1); free($1); } 760 | YY_HEX { $$ = $1; } 761 ; 762 763 srcobject: 764 { yyresetdict(); } fromport 765 | srcaddr srcport 766 | '!' srcaddr srcport 767 { DOALL(fr->fr_flags |= FR_NOTSRCIP;) } 768 ; 769 770 srcaddr: 771 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_src, sizeof($1.a)); \ 772 bcopy(&($1.m), &fr->fr_mip.fi_src, sizeof($1.m)); \ 773 if (dynamic != -1) { \ 774 fr->fr_satype = ifpflag; \ 775 fr->fr_ipf->fri_sifpidx = dynamic; \ 776 } else if (pooled || hashed) \ 777 fr->fr_satype = FRI_LOOKUP;) 778 } 779 | lstart srcaddrlist lend 780 ; 781 782 srcaddrlist: 783 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_src, sizeof($1.a)); \ 784 bcopy(&($1.m), &fr->fr_mip.fi_src, sizeof($1.m)); \ 785 if (dynamic != -1) { \ 786 fr->fr_satype = ifpflag; \ 787 fr->fr_ipf->fri_sifpidx = dynamic; \ 788 } else if (pooled || hashed) \ 789 fr->fr_satype = FRI_LOOKUP;) 790 } 791 | srcaddrlist lmore addr 792 { DOREM(bcopy(&($3.a), &fr->fr_ip.fi_src, sizeof($3.a)); \ 793 bcopy(&($3.m), &fr->fr_mip.fi_src, sizeof($3.m)); \ 794 if (dynamic != -1) { \ 795 fr->fr_satype = ifpflag; \ 796 fr->fr_ipf->fri_sifpidx = dynamic; \ 797 } else if (pooled || hashed) \ 798 fr->fr_satype = FRI_LOOKUP;) 799 } 800 ; 801 802 srcport: 803 | portcomp 804 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 805 | portrange 806 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 807 fr->fr_stop = $1.p2;) } 808 | porteq lstart srcportlist lend 809 { yyresetdict(); } 810 ; 811 812 fromport: 813 portcomp 814 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 815 | portrange 816 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 817 fr->fr_stop = $1.p2;) } 818 | porteq lstart srcportlist lend 819 { yyresetdict(); } 820 ; 821 822 srcportlist: 823 portnum { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $1;) } 824 | srcportlist lmore portnum 825 { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $3;) } 826 ; 827 828 dstobject: 829 { yyresetdict(); } toport 830 | dstaddr dstport 831 | '!' dstaddr dstport 832 { DOALL(fr->fr_flags |= FR_NOTDSTIP;) } 833 ; 834 835 dstaddr: 836 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_dst, sizeof($1.a)); \ 837 bcopy(&($1.m), &fr->fr_mip.fi_dst, sizeof($1.m)); \ 838 if (dynamic != -1) { \ 839 fr->fr_datype = ifpflag; \ 840 fr->fr_ipf->fri_difpidx = dynamic; \ 841 } else if (pooled || hashed) \ 842 fr->fr_datype = FRI_LOOKUP;) 843 } 844 | lstart dstaddrlist lend 845 ; 846 847 dstaddrlist: 848 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_dst, sizeof($1.a)); \ 849 bcopy(&($1.m), &fr->fr_mip.fi_dst, sizeof($1.m)); \ 850 if (dynamic != -1) { \ 851 fr->fr_datype = ifpflag; \ 852 fr->fr_ipf->fri_difpidx = dynamic; \ 853 } else if (pooled || hashed) \ 854 fr->fr_datype = FRI_LOOKUP;) 855 } 856 | dstaddrlist lmore addr 857 { DOREM(bcopy(&($3.a), &fr->fr_ip.fi_dst, sizeof($3.a)); \ 858 bcopy(&($3.m), &fr->fr_mip.fi_dst, sizeof($3.m)); \ 859 if (dynamic != -1) { \ 860 fr->fr_datype = ifpflag; \ 861 fr->fr_ipf->fri_difpidx = dynamic; \ 862 } else if (pooled || hashed) \ 863 fr->fr_datype = FRI_LOOKUP;) 864 } 865 ; 866 867 868 dstport: 869 | portcomp 870 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 871 | portrange 872 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 873 fr->fr_dtop = $1.p2;) } 874 | porteq lstart dstportlist lend 875 { yyresetdict(); } 876 ; 877 878 toport: 879 portcomp 880 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 881 | portrange 882 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 883 fr->fr_dtop = $1.p2;) } 884 | porteq lstart dstportlist lend 885 { yyresetdict(); } 886 ; 887 888 dstportlist: 889 portnum { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $1;) } 890 | dstportlist lmore portnum 891 { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $3;) } 892 ; 893 894 addr: pool '/' YY_NUMBER { pooled = 1; 895 yyexpectaddr = 0; 896 $$.a.iplookuptype = IPLT_POOL; 897 $$.a.iplookupnum = $3; } 898 | pool '=' '(' poollist ')' { pooled = 1; 899 yyexpectaddr = 0; 900 $$.a.iplookuptype = IPLT_POOL; 901 $$.a.iplookupnum = makepool($4); } 902 | hash '/' YY_NUMBER { hashed = 1; 903 yyexpectaddr = 0; 904 $$.a.iplookuptype = IPLT_HASH; 905 $$.a.iplookupnum = $3; } 906 | hash '=' '(' addrlist ')' { hashed = 1; 907 yyexpectaddr = 0; 908 $$.a.iplookuptype = IPLT_HASH; 909 $$.a.iplookupnum = makehash($4); } 910 | ipaddr { bcopy(&$1, &$$, sizeof($$)); 911 yyexpectaddr = 0; } 912 ; 913 914 ipaddr: IPFY_ANY { bzero(&($$), sizeof($$)); 915 yyresetdict(); 916 yyexpectaddr = 0; } 917 | hostname { $$.a.in4 = $1; 918 $$.m.in4_addr = 0xffffffff; 919 yyexpectaddr = 0; } 920 | hostname { yyresetdict(); 921 $$.a.in4_addr = $1.s_addr; } 922 maskspace { yysetdict(maskwords); } 923 ipv4mask { $$.m.in4_addr = $5.s_addr; 924 $$.a.in4_addr &= $5.s_addr; 925 yyresetdict(); 926 yyexpectaddr = 0; } 927 | YY_IPV6 { set_ipv6_addr = 1; 928 bcopy(&$1, &$$.a, sizeof($$.a)); 929 fill6bits(128, (u_32_t *)&$$.m); 930 yyresetdict(); 931 yyexpectaddr = 0; } 932 | YY_IPV6 { set_ipv6_addr = 1; 933 yyresetdict(); 934 bcopy(&$1, &$$.a, sizeof($$.a)); } 935 maskspace { yysetdict(maskwords); } 936 ipv6mask { bcopy(&$5, &$$.m, sizeof($$.m)); 937 yyresetdict(); 938 yyexpectaddr = 0; } 939 ; 940 941 maskspace: 942 '/' 943 | IPFY_MASK 944 ; 945 946 ipv4mask: 947 ipv4 { $$ = $1; } 948 | YY_HEX { $$.s_addr = htonl($1); } 949 | YY_NUMBER { if (($1 >= 0) && ($1 <= 32)) { 950 ntomask(4, $1, (u_32_t *)&$$); 951 } else 952 yyerror("invalid mask"); 953 } 954 | IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 955 $$.s_addr = 0; 956 ifpflag = FRI_BROADCAST; 957 } else 958 YYERROR; 959 } 960 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 961 $$.s_addr = 0; 962 ifpflag = FRI_NETWORK; 963 } else 964 YYERROR; 965 } 966 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 967 $$.s_addr = 0; 968 ifpflag = FRI_NETMASKED; 969 } else 970 YYERROR; 971 } 972 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 973 $$.s_addr = 0; 974 ifpflag = FRI_PEERADDR; 975 } else 976 YYERROR; 977 } 978 ; 979 980 ipv6mask: 981 YY_NUMBER { if (($1 >= 0) && ($1 <= 128)) { 982 ntomask(6, $1, $$.i6); 983 } else 984 yyerror("invalid mask"); 985 } 986 | IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 987 bzero(&$$, sizeof($$)); 988 ifpflag = FRI_BROADCAST; 989 } else 990 YYERROR; 991 } 992 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 993 bzero(&$$, sizeof($$)); 994 ifpflag = FRI_BROADCAST; 995 } else 996 YYERROR; 997 } 998 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 999 bzero(&$$, sizeof($$)); 1000 ifpflag = FRI_BROADCAST; 1001 } else 1002 YYERROR; 1003 } 1004 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 1005 bzero(&$$, sizeof($$)); 1006 ifpflag = FRI_BROADCAST; 1007 } else 1008 YYERROR; 1009 } 1010 ; 1011 1012 hostname: 1013 ipv4 { $$ = $1; } 1014 | YY_NUMBER { $$.s_addr = $1; } 1015 | YY_HEX { $$.s_addr = $1; } 1016 | YY_STR { $$.s_addr = lookuphost($1); 1017 free($1); 1018 if ($$.s_addr == 0 && 1019 ifpflag != FRI_DYNAMIC) 1020 yyerror("Unknown hostname"); 1021 } 1022 ; 1023 1024 addrlist: 1025 ipaddr { $$ = newalist(NULL); 1026 if (set_ipv6_addr) 1027 $$->al_family = AF_INET6; 1028 else 1029 $$->al_family = AF_INET; 1030 set_ipv6_addr = 0; 1031 bcopy(&($1.a), &($$->al_i6addr), sizeof($1.a)); 1032 bcopy(&($1.m), &($$->al_i6mask), sizeof($1.m)); } 1033 | addrlist ',' ipaddr 1034 { $$ = newalist($1); 1035 if (set_ipv6_addr) 1036 $$->al_family = AF_INET6; 1037 else 1038 $$->al_family = AF_INET; 1039 set_ipv6_addr = 0; 1040 bcopy(&($3.a), &($$->al_i6addr), sizeof($3.a)); 1041 bcopy(&($3.m), &($$->al_i6mask), sizeof($3.m)); } 1042 ; 1043 1044 pool: IPFY_POOL { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1045 ; 1046 1047 hash: IPFY_HASH { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1048 ; 1049 1050 poollist: 1051 ipaddr { $$ = newalist(NULL); 1052 if (set_ipv6_addr) 1053 $$->al_family = AF_INET6; 1054 else 1055 $$->al_family = AF_INET; 1056 set_ipv6_addr = 0; 1057 bcopy(&($1.a), &($$->al_i6addr), sizeof($1.a)); 1058 bcopy(&($1.m), &($$->al_i6mask), sizeof($1.m)); } 1059 | '!' ipaddr { $$ = newalist(NULL); 1060 $$->al_not = 1; 1061 if (set_ipv6_addr) 1062 $$->al_family = AF_INET6; 1063 else 1064 $$->al_family = AF_INET; 1065 set_ipv6_addr = 0; 1066 bcopy(&($2.a), &($$->al_i6addr), sizeof($2.a)); 1067 bcopy(&($2.m), &($$->al_i6mask), sizeof($2.m)); } 1068 | poollist ',' ipaddr 1069 { $$ = newalist($1); 1070 if (set_ipv6_addr) 1071 $$->al_family = AF_INET6; 1072 else 1073 $$->al_family = AF_INET; 1074 set_ipv6_addr = 0; 1075 bcopy(&($3.a), &($$->al_i6addr), sizeof($3.a)); 1076 bcopy(&($3.m), &($$->al_i6mask), sizeof($3.m)); } 1077 | poollist ',' '!' ipaddr 1078 { $$ = newalist($1); 1079 $$->al_not = 1; 1080 if (set_ipv6_addr) 1081 $$->al_family = AF_INET6; 1082 else 1083 $$->al_family = AF_INET; 1084 set_ipv6_addr = 0; 1085 bcopy(&($4.a), &($$->al_i6addr), sizeof($4.a)); 1086 bcopy(&($4.m), &($$->al_i6mask), sizeof($4.m)); } 1087 ; 1088 1089 port: IPFY_PORT { yyexpectaddr = 0; 1090 yycont = NULL; 1091 } 1092 ; 1093 1094 portc: port compare { $$ = $2; 1095 yysetdict(NULL); } 1096 | porteq { $$ = $1; } 1097 ; 1098 1099 porteq: port '=' { $$ = FR_EQUAL; 1100 yysetdict(NULL); } 1101 ; 1102 1103 portr: IPFY_PORT { yyexpectaddr = 0; 1104 yycont = NULL; 1105 yysetdict(NULL); } 1106 ; 1107 1108 portcomp: 1109 portc portnum { $$.pc = $1; 1110 $$.p1 = $2; 1111 yyresetdict(); } 1112 ; 1113 1114 portrange: 1115 portr portnum range portnum { $$.p1 = $2; 1116 $$.pc = $3; 1117 $$.p2 = $4; 1118 yyresetdict(); } 1119 ; 1120 1121 icmp: | itype icode 1122 ; 1123 1124 itype: seticmptype icmptype 1125 { DOALL(fr->fr_icmp = htons($2 << 8); fr->fr_icmpm = htons(0xff00);); 1126 yyresetdict(); 1127 } 1128 | seticmptype lstart typelist lend { yyresetdict(); } 1129 ; 1130 1131 seticmptype: 1132 IPFY_ICMPTYPE { setipftype(); 1133 yysetdict(icmptypewords); } 1134 ; 1135 1136 icode: | seticmpcode icmpcode 1137 { DOALL(fr->fr_icmp |= htons($2); fr->fr_icmpm |= htons(0xff);); 1138 yyresetdict(); 1139 } 1140 | seticmpcode lstart codelist lend { yyresetdict(); } 1141 ; 1142 1143 seticmpcode: 1144 IPFY_ICMPCODE { yysetdict(icmpcodewords); } 1145 ; 1146 1147 typelist: 1148 icmptype 1149 { DOREM(fr->fr_icmp = htons($1 << 8); fr->fr_icmpm = htons(0xff00);) } 1150 | typelist lmore icmptype 1151 { DOREM(fr->fr_icmp = htons($3 << 8); fr->fr_icmpm = htons(0xff00);) } 1152 ; 1153 1154 codelist: 1155 icmpcode 1156 { DOREM(fr->fr_icmp |= htons($1); fr->fr_icmpm |= htons(0xff);) } 1157 | codelist lmore icmpcode 1158 { DOREM(fr->fr_icmp |= htons($3); fr->fr_icmpm |= htons(0xff);) } 1159 ; 1160 1161 age: | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1162 fr->fr_age[1] = $2;) } 1163 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1164 { DOALL(fr->fr_age[0] = $2; \ 1165 fr->fr_age[1] = $4;) } 1166 ; 1167 1168 keep: | IPFY_KEEP keepstate 1169 | IPFY_KEEP keepfrag 1170 | IPFY_KEEP keepstate IPFY_KEEP keepfrag 1171 | IPFY_KEEP keepfrag IPFY_KEEP keepstate 1172 ; 1173 1174 keepstate: 1175 IPFY_STATE stateoptlist { DOALL(fr->fr_flags |= FR_KEEPSTATE;)} 1176 ; 1177 1178 keepfrag: 1179 IPFY_FRAGS fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1180 | IPFY_FRAG fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1181 ; 1182 1183 fragoptlist: 1184 | '(' fragopts ')' 1185 ; 1186 1187 fragopts: 1188 fragopt lanother fragopts 1189 | fragopt 1190 ; 1191 1192 fragopt: 1193 IPFY_STRICT { DOALL(fr->fr_flags |= FR_FRSTRICT;) } 1194 ; 1195 1196 stateoptlist: 1197 | '(' stateopts ')' 1198 ; 1199 1200 stateopts: 1201 stateopt lanother stateopts 1202 | stateopt 1203 ; 1204 1205 stateopt: 1206 IPFY_LIMIT YY_NUMBER { DOALL(fr->fr_statemax = $2;) } 1207 | IPFY_STRICT { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1208 YYERROR; \ 1209 } else \ 1210 fr->fr_flags |= FR_STSTRICT;) 1211 } 1212 | IPFY_NEWISN { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1213 YYERROR; \ 1214 } else \ 1215 fr->fr_flags |= FR_NEWISN;) 1216 } 1217 | IPFY_NOICMPERR { DOALL(fr->fr_flags |= FR_NOICMPERR;) } 1218 1219 | IPFY_SYNC { DOALL(fr->fr_flags |= FR_STATESYNC;) } 1220 ; 1221 1222 portnum: 1223 servicename { if (getport(frc, $1, &($$)) == -1) 1224 yyerror("service unknown"); 1225 else 1226 $$ = ntohs($$); 1227 free($1); 1228 } 1229 | YY_NUMBER { if ($1 > 65535) /* Unsigned */ 1230 yyerror("invalid port number"); 1231 else 1232 $$ = $1; 1233 } 1234 ; 1235 1236 withlist: 1237 withopt 1238 | withlist withopt 1239 | withlist ',' withopt 1240 ; 1241 1242 withopt: 1243 opttype { DOALL(fr->fr_flx |= $1; fr->fr_mflx |= $1;) } 1244 | notwith opttype 1245 { DOALL(fr->fr_mflx |= $2;) } 1246 | ipopt ipopts { yyresetdict(); } 1247 | notwith ipopt ipopts { yyresetdict(); } 1248 | startv6hdrs ipv6hdrs { yyresetdict(); } 1249 ; 1250 1251 ipopt: IPFY_OPT { yysetdict(ipv4optwords); } 1252 ; 1253 1254 startv6hdrs: 1255 IPF6_V6HDRS { if (use_inet6 == 0) 1256 yyerror("only available with IPv6"); 1257 yysetdict(ipv6optwords); 1258 } 1259 ; 1260 1261 notwith: 1262 IPFY_NOT { nowith = 1; } 1263 | IPFY_NO { nowith = 1; } 1264 ; 1265 1266 opttype: 1267 IPFY_IPOPTS { $$ = FI_OPTIONS; } 1268 | IPFY_SHORT { $$ = FI_SHORT; } 1269 | IPFY_NAT { $$ = FI_NATED; } 1270 | IPFY_BAD { $$ = FI_BAD; } 1271 | IPFY_BADNAT { $$ = FI_BADNAT; } 1272 | IPFY_BADSRC { $$ = FI_BADSRC; } 1273 | IPFY_LOWTTL { $$ = FI_LOWTTL; } 1274 | IPFY_FRAG { $$ = FI_FRAG; } 1275 | IPFY_FRAGBODY { $$ = FI_FRAGBODY; } 1276 | IPFY_FRAGS { $$ = FI_FRAG; } 1277 | IPFY_MBCAST { $$ = FI_MBCAST; } 1278 | IPFY_MULTICAST { $$ = FI_MULTICAST; } 1279 | IPFY_BROADCAST { $$ = FI_BROADCAST; } 1280 | IPFY_STATE { $$ = FI_STATE; } 1281 | IPFY_OOW { $$ = FI_OOW; } 1282 ; 1283 1284 ipopts: optlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1285 if (!nowith) 1286 fr->fr_ip.fi_optmsk |= $1;) 1287 } 1288 ; 1289 1290 optlist: 1291 opt { $$ |= $1; } 1292 | optlist ',' opt { $$ |= $1 | $3; } 1293 ; 1294 1295 ipv6hdrs: 1296 ipv6hdrlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1297 if (!nowith) 1298 fr->fr_ip.fi_optmsk |= $1;) 1299 } 1300 ; 1301 1302 ipv6hdrlist: 1303 ipv6hdr { $$ |= $1; } 1304 | ipv6hdrlist ',' ipv6hdr { $$ |= $1 | $3; } 1305 ; 1306 1307 secname: 1308 seclevel { $$ |= $1; } 1309 | secname ',' seclevel { $$ |= $1 | $3; } 1310 ; 1311 1312 seclevel: 1313 IPFY_SEC_UNC { $$ = secbit(IPSO_CLASS_UNCL); } 1314 | IPFY_SEC_CONF { $$ = secbit(IPSO_CLASS_CONF); } 1315 | IPFY_SEC_RSV1 { $$ = secbit(IPSO_CLASS_RES1); } 1316 | IPFY_SEC_RSV2 { $$ = secbit(IPSO_CLASS_RES2); } 1317 | IPFY_SEC_RSV3 { $$ = secbit(IPSO_CLASS_RES3); } 1318 | IPFY_SEC_RSV4 { $$ = secbit(IPSO_CLASS_RES4); } 1319 | IPFY_SEC_SEC { $$ = secbit(IPSO_CLASS_SECR); } 1320 | IPFY_SEC_TS { $$ = secbit(IPSO_CLASS_TOPS); } 1321 ; 1322 1323 icmptype: 1324 YY_NUMBER { $$ = $1; } 1325 | IPFY_ICMPT_UNR { $$ = ICMP_UNREACH; } 1326 | IPFY_ICMPT_ECHO { $$ = ICMP_ECHO; } 1327 | IPFY_ICMPT_ECHOR { $$ = ICMP_ECHOREPLY; } 1328 | IPFY_ICMPT_SQUENCH { $$ = ICMP_SOURCEQUENCH; } 1329 | IPFY_ICMPT_REDIR { $$ = ICMP_REDIRECT; } 1330 | IPFY_ICMPT_TIMEX { $$ = ICMP_TIMXCEED; } 1331 | IPFY_ICMPT_PARAMP { $$ = ICMP_PARAMPROB; } 1332 | IPFY_ICMPT_TIMEST { $$ = ICMP_TSTAMP; } 1333 | IPFY_ICMPT_TIMESTREP { $$ = ICMP_TSTAMPREPLY; } 1334 | IPFY_ICMPT_INFOREQ { $$ = ICMP_IREQ; } 1335 | IPFY_ICMPT_INFOREP { $$ = ICMP_IREQREPLY; } 1336 | IPFY_ICMPT_MASKREQ { $$ = ICMP_MASKREQ; } 1337 | IPFY_ICMPT_MASKREP { $$ = ICMP_MASKREPLY; } 1338 | IPFY_ICMPT_ROUTERAD { $$ = ICMP_ROUTERADVERT; } 1339 | IPFY_ICMPT_ROUTERSOL { $$ = ICMP_ROUTERSOLICIT; } 1340 ; 1341 1342 icmpcode: 1343 YY_NUMBER { $$ = $1; } 1344 | IPFY_ICMPC_NETUNR { $$ = ICMP_UNREACH_NET; } 1345 | IPFY_ICMPC_HSTUNR { $$ = ICMP_UNREACH_HOST; } 1346 | IPFY_ICMPC_PROUNR { $$ = ICMP_UNREACH_PROTOCOL; } 1347 | IPFY_ICMPC_PORUNR { $$ = ICMP_UNREACH_PORT; } 1348 | IPFY_ICMPC_NEEDF { $$ = ICMP_UNREACH_NEEDFRAG; } 1349 | IPFY_ICMPC_SRCFAIL { $$ = ICMP_UNREACH_SRCFAIL; } 1350 | IPFY_ICMPC_NETUNK { $$ = ICMP_UNREACH_NET_UNKNOWN; } 1351 | IPFY_ICMPC_HSTUNK { $$ = ICMP_UNREACH_HOST_UNKNOWN; } 1352 | IPFY_ICMPC_ISOLATE { $$ = ICMP_UNREACH_ISOLATED; } 1353 | IPFY_ICMPC_NETPRO { $$ = ICMP_UNREACH_NET_PROHIB; } 1354 | IPFY_ICMPC_HSTPRO { $$ = ICMP_UNREACH_HOST_PROHIB; } 1355 | IPFY_ICMPC_NETTOS { $$ = ICMP_UNREACH_TOSNET; } 1356 | IPFY_ICMPC_HSTTOS { $$ = ICMP_UNREACH_TOSHOST; } 1357 | IPFY_ICMPC_FLTPRO { $$ = ICMP_UNREACH_ADMIN_PROHIBIT; } 1358 | IPFY_ICMPC_HSTPRE { $$ = 14; } 1359 | IPFY_ICMPC_CUTPRE { $$ = 15; } 1360 ; 1361 1362 opt: 1363 IPFY_IPOPT_NOP { $$ = getoptbyvalue(IPOPT_NOP); } 1364 | IPFY_IPOPT_RR { $$ = getoptbyvalue(IPOPT_RR); } 1365 | IPFY_IPOPT_ZSU { $$ = getoptbyvalue(IPOPT_ZSU); } 1366 | IPFY_IPOPT_MTUP { $$ = getoptbyvalue(IPOPT_MTUP); } 1367 | IPFY_IPOPT_MTUR { $$ = getoptbyvalue(IPOPT_MTUR); } 1368 | IPFY_IPOPT_ENCODE { $$ = getoptbyvalue(IPOPT_ENCODE); } 1369 | IPFY_IPOPT_TS { $$ = getoptbyvalue(IPOPT_TS); } 1370 | IPFY_IPOPT_TR { $$ = getoptbyvalue(IPOPT_TR); } 1371 | IPFY_IPOPT_SEC { $$ = getoptbyvalue(IPOPT_SECURITY); } 1372 | IPFY_IPOPT_LSRR { $$ = getoptbyvalue(IPOPT_LSRR); } 1373 | IPFY_IPOPT_ESEC { $$ = getoptbyvalue(IPOPT_E_SEC); } 1374 | IPFY_IPOPT_CIPSO { $$ = getoptbyvalue(IPOPT_CIPSO); } 1375 | IPFY_IPOPT_SATID { $$ = getoptbyvalue(IPOPT_SATID); } 1376 | IPFY_IPOPT_SSRR { $$ = getoptbyvalue(IPOPT_SSRR); } 1377 | IPFY_IPOPT_ADDEXT { $$ = getoptbyvalue(IPOPT_ADDEXT); } 1378 | IPFY_IPOPT_VISA { $$ = getoptbyvalue(IPOPT_VISA); } 1379 | IPFY_IPOPT_IMITD { $$ = getoptbyvalue(IPOPT_IMITD); } 1380 | IPFY_IPOPT_EIP { $$ = getoptbyvalue(IPOPT_EIP); } 1381 | IPFY_IPOPT_FINN { $$ = getoptbyvalue(IPOPT_FINN); } 1382 | IPFY_IPOPT_DPS { $$ = getoptbyvalue(IPOPT_DPS); } 1383 | IPFY_IPOPT_SDB { $$ = getoptbyvalue(IPOPT_SDB); } 1384 | IPFY_IPOPT_NSAPA { $$ = getoptbyvalue(IPOPT_NSAPA); } 1385 | IPFY_IPOPT_RTRALRT { $$ = getoptbyvalue(IPOPT_RTRALRT); } 1386 | IPFY_IPOPT_UMP { $$ = getoptbyvalue(IPOPT_UMP); } 1387 | setsecclass secname 1388 { DOALL(fr->fr_mip.fi_secmsk |= $2; 1389 if (!nowith) 1390 fr->fr_ip.fi_secmsk |= $2;) 1391 $$ = 0; 1392 yyresetdict(); 1393 } 1394 ; 1395 1396 setsecclass: 1397 IPFY_SECCLASS { yysetdict(ipv4secwords); } 1398 ; 1399 1400 ipv6hdr: 1401 IPFY_AH { $$ = getv6optbyvalue(IPPROTO_AH); } 1402 | IPFY_IPV6OPT_DSTOPTS { $$ = getv6optbyvalue(IPPROTO_DSTOPTS); } 1403 | IPFY_ESP { $$ = getv6optbyvalue(IPPROTO_ESP); } 1404 | IPFY_IPV6OPT_HOPOPTS { $$ = getv6optbyvalue(IPPROTO_HOPOPTS); } 1405 | IPFY_IPV6OPT_IPV6 { $$ = getv6optbyvalue(IPPROTO_IPV6); } 1406 | IPFY_IPV6OPT_NONE { $$ = getv6optbyvalue(IPPROTO_NONE); } 1407 | IPFY_IPV6OPT_ROUTING { $$ = getv6optbyvalue(IPPROTO_ROUTING); } 1408 | IPFY_FRAG { $$ = getv6optbyvalue(IPPROTO_FRAGMENT); } 1409 ; 1410 1411 level: IPFY_LEVEL { setsyslog(); } 1412 ; 1413 1414 loglevel: 1415 priority { fr->fr_loglevel = LOG_LOCAL0|$1; } 1416 | facility '.' priority { fr->fr_loglevel = $1 | $3; } 1417 ; 1418 1419 facility: 1420 IPFY_FAC_KERN { $$ = LOG_KERN; } 1421 | IPFY_FAC_USER { $$ = LOG_USER; } 1422 | IPFY_FAC_MAIL { $$ = LOG_MAIL; } 1423 | IPFY_FAC_DAEMON { $$ = LOG_DAEMON; } 1424 | IPFY_FAC_AUTH { $$ = LOG_AUTH; } 1425 | IPFY_FAC_SYSLOG { $$ = LOG_SYSLOG; } 1426 | IPFY_FAC_LPR { $$ = LOG_LPR; } 1427 | IPFY_FAC_NEWS { $$ = LOG_NEWS; } 1428 | IPFY_FAC_UUCP { $$ = LOG_UUCP; } 1429 | IPFY_FAC_CRON { $$ = LOG_CRON; } 1430 | IPFY_FAC_FTP { $$ = LOG_FTP; } 1431 | IPFY_FAC_AUTHPRIV { $$ = LOG_AUTHPRIV; } 1432 | IPFY_FAC_AUDIT { $$ = LOG_AUDIT; } 1433 | IPFY_FAC_LFMT { $$ = LOG_LFMT; } 1434 | IPFY_FAC_LOCAL0 { $$ = LOG_LOCAL0; } 1435 | IPFY_FAC_LOCAL1 { $$ = LOG_LOCAL1; } 1436 | IPFY_FAC_LOCAL2 { $$ = LOG_LOCAL2; } 1437 | IPFY_FAC_LOCAL3 { $$ = LOG_LOCAL3; } 1438 | IPFY_FAC_LOCAL4 { $$ = LOG_LOCAL4; } 1439 | IPFY_FAC_LOCAL5 { $$ = LOG_LOCAL5; } 1440 | IPFY_FAC_LOCAL6 { $$ = LOG_LOCAL6; } 1441 | IPFY_FAC_LOCAL7 { $$ = LOG_LOCAL7; } 1442 | IPFY_FAC_SECURITY { $$ = LOG_SECURITY; } 1443 ; 1444 1445 priority: 1446 IPFY_PRI_EMERG { $$ = LOG_EMERG; } 1447 | IPFY_PRI_ALERT { $$ = LOG_ALERT; } 1448 | IPFY_PRI_CRIT { $$ = LOG_CRIT; } 1449 | IPFY_PRI_ERR { $$ = LOG_ERR; } 1450 | IPFY_PRI_WARN { $$ = LOG_WARNING; } 1451 | IPFY_PRI_NOTICE { $$ = LOG_NOTICE; } 1452 | IPFY_PRI_INFO { $$ = LOG_INFO; } 1453 | IPFY_PRI_DEBUG { $$ = LOG_DEBUG; } 1454 ; 1455 1456 compare: 1457 YY_CMP_EQ { $$ = FR_EQUAL; } 1458 | YY_CMP_NE { $$ = FR_NEQUAL; } 1459 | YY_CMP_LT { $$ = FR_LESST; } 1460 | YY_CMP_LE { $$ = FR_LESSTE; } 1461 | YY_CMP_GT { $$ = FR_GREATERT; } 1462 | YY_CMP_GE { $$ = FR_GREATERTE; } 1463 ; 1464 1465 range: YY_RANGE_IN { $$ = FR_INRANGE; } 1466 | YY_RANGE_OUT { $$ = FR_OUTRANGE; } 1467 | ':' { $$ = FR_INCRANGE; } 1468 ; 1469 1470 servicename: 1471 YY_STR { $$ = $1; } 1472 ; 1473 1474 interfacename: YY_STR { $$ = $1; } 1475 | YY_STR ':' YY_NUMBER 1476 { $$ = $1; 1477 fprintf(stderr, "%d: Logical interface %s:%d unsupported, " 1478 "use the physical interface %s instead.\n", 1479 yylineNum, $1, $3, $1); 1480 } 1481 ; 1482 1483 name: YY_STR { $$ = $1; } 1484 ; 1485 1486 ipv4_16: 1487 YY_NUMBER '.' YY_NUMBER 1488 { if ($1 > 255 || $3 > 255) { 1489 yyerror("Invalid octet string for IP address"); 1490 return 0; 1491 } 1492 $$.s_addr = ($1 << 24) | ($3 << 16); 1493 $$.s_addr = htonl($$.s_addr); 1494 } 1495 ; 1496 1497 ipv4_24: 1498 ipv4_16 '.' YY_NUMBER 1499 { if ($3 > 255) { 1500 yyerror("Invalid octet string for IP address"); 1501 return 0; 1502 } 1503 $$.s_addr |= htonl($3 << 8); 1504 } 1505 ; 1506 1507 ipv4: ipv4_24 '.' YY_NUMBER 1508 { if ($3 > 255) { 1509 yyerror("Invalid octet string for IP address"); 1510 return 0; 1511 } 1512 $$.s_addr |= htonl($3); 1513 } 1514 | ipv4_24 1515 | ipv4_16 1516 ; 1517 1518 %% 1519 1520 1521 static struct wordtab ipfwords[95] = { 1522 { "age", IPFY_AGE }, 1523 { "ah", IPFY_AH }, 1524 { "all", IPFY_ALL }, 1525 { "and", IPFY_AND }, 1526 { "auth", IPFY_AUTH }, 1527 { "bad", IPFY_BAD }, 1528 { "bad-nat", IPFY_BADNAT }, 1529 { "bad-src", IPFY_BADSRC }, 1530 { "bcast", IPFY_BROADCAST }, 1531 { "block", IPFY_BLOCK }, 1532 { "body", IPFY_BODY }, 1533 { "bpf-v4", IPFY_BPFV4 }, 1534 #ifdef USE_INET6 1535 { "bpf-v6", IPFY_BPFV6 }, 1536 #endif 1537 { "call", IPFY_CALL }, 1538 { "code", IPFY_ICMPCODE }, 1539 { "count", IPFY_COUNT }, 1540 { "dup-to", IPFY_DUPTO }, 1541 { "eq", YY_CMP_EQ }, 1542 { "esp", IPFY_ESP }, 1543 { "fastroute", IPFY_FROUTE }, 1544 { "first", IPFY_FIRST }, 1545 { "flags", IPFY_FLAGS }, 1546 { "frag", IPFY_FRAG }, 1547 { "frag-body", IPFY_FRAGBODY }, 1548 { "frags", IPFY_FRAGS }, 1549 { "from", IPFY_FROM }, 1550 { "ge", YY_CMP_GE }, 1551 { "group", IPFY_GROUP }, 1552 { "gt", YY_CMP_GT }, 1553 { "head", IPFY_HEAD }, 1554 { "icmp", IPFY_ICMP }, 1555 { "icmp-type", IPFY_ICMPTYPE }, 1556 { "in", IPFY_IN }, 1557 { "in-via", IPFY_INVIA }, 1558 { "ipopt", IPFY_IPOPTS }, 1559 { "ipopts", IPFY_IPOPTS }, 1560 { "keep", IPFY_KEEP }, 1561 { "le", YY_CMP_LE }, 1562 { "level", IPFY_LEVEL }, 1563 { "limit", IPFY_LIMIT }, 1564 { "log", IPFY_LOG }, 1565 { "lowttl", IPFY_LOWTTL }, 1566 { "lt", YY_CMP_LT }, 1567 { "mask", IPFY_MASK }, 1568 { "match-tag", IPFY_MATCHTAG }, 1569 { "mbcast", IPFY_MBCAST }, 1570 { "multicast", IPFY_MULTICAST }, 1571 { "nat", IPFY_NAT }, 1572 { "ne", YY_CMP_NE }, 1573 { "net", IPFY_NETWORK }, 1574 { "newisn", IPFY_NEWISN }, 1575 { "no", IPFY_NO }, 1576 { "no-icmp-err", IPFY_NOICMPERR }, 1577 { "now", IPFY_NOW }, 1578 { "not", IPFY_NOT }, 1579 { "oow", IPFY_OOW }, 1580 { "on", IPFY_ON }, 1581 { "opt", IPFY_OPT }, 1582 { "or-block", IPFY_ORBLOCK }, 1583 { "out", IPFY_OUT }, 1584 { "out-via", IPFY_OUTVIA }, 1585 { "pass", IPFY_PASS }, 1586 { "port", IPFY_PORT }, 1587 { "pps", IPFY_PPS }, 1588 { "preauth", IPFY_PREAUTH }, 1589 { "proto", IPFY_PROTO }, 1590 { "quick", IPFY_QUICK }, 1591 { "reply-to", IPFY_REPLY_TO }, 1592 { "return-icmp", IPFY_RETICMP }, 1593 { "return-icmp-as-dest", IPFY_RETICMPASDST }, 1594 { "return-rst", IPFY_RETRST }, 1595 { "route-to", IPFY_ROUTETO }, 1596 { "sec-class", IPFY_SECCLASS }, 1597 { "set-tag", IPFY_SETTAG }, 1598 { "skip", IPFY_SKIP }, 1599 { "short", IPFY_SHORT }, 1600 { "state", IPFY_STATE }, 1601 { "state-age", IPFY_AGE }, 1602 { "strict", IPFY_STRICT }, 1603 { "sync", IPFY_SYNC }, 1604 { "tcp", IPFY_TCP }, 1605 { "tcp-udp", IPFY_TCPUDP }, 1606 { "tos", IPFY_TOS }, 1607 { "to", IPFY_TO }, 1608 { "ttl", IPFY_TTL }, 1609 { "udp", IPFY_UDP }, 1610 { "v6hdrs", IPF6_V6HDRS }, 1611 { "with", IPFY_WITH }, 1612 { NULL, 0 } 1613 }; 1614 1615 static struct wordtab addrwords[4] = { 1616 { "any", IPFY_ANY }, 1617 { "hash", IPFY_HASH }, 1618 { "pool", IPFY_POOL }, 1619 { NULL, 0 } 1620 }; 1621 1622 static struct wordtab maskwords[5] = { 1623 { "broadcast", IPFY_BROADCAST }, 1624 { "netmasked", IPFY_NETMASKED }, 1625 { "network", IPFY_NETWORK }, 1626 { "peer", IPFY_PEER }, 1627 { NULL, 0 } 1628 }; 1629 1630 static struct wordtab icmptypewords[16] = { 1631 { "echo", IPFY_ICMPT_ECHO }, 1632 { "echorep", IPFY_ICMPT_ECHOR }, 1633 { "inforeq", IPFY_ICMPT_INFOREQ }, 1634 { "inforep", IPFY_ICMPT_INFOREP }, 1635 { "maskrep", IPFY_ICMPT_MASKREP }, 1636 { "maskreq", IPFY_ICMPT_MASKREQ }, 1637 { "paramprob", IPFY_ICMPT_PARAMP }, 1638 { "redir", IPFY_ICMPT_REDIR }, 1639 { "unreach", IPFY_ICMPT_UNR }, 1640 { "routerad", IPFY_ICMPT_ROUTERAD }, 1641 { "routersol", IPFY_ICMPT_ROUTERSOL }, 1642 { "squench", IPFY_ICMPT_SQUENCH }, 1643 { "timest", IPFY_ICMPT_TIMEST }, 1644 { "timestrep", IPFY_ICMPT_TIMESTREP }, 1645 { "timex", IPFY_ICMPT_TIMEX }, 1646 { NULL, 0 }, 1647 }; 1648 1649 static struct wordtab icmpcodewords[17] = { 1650 { "cutoff-preced", IPFY_ICMPC_CUTPRE }, 1651 { "filter-prohib", IPFY_ICMPC_FLTPRO }, 1652 { "isolate", IPFY_ICMPC_ISOLATE }, 1653 { "needfrag", IPFY_ICMPC_NEEDF }, 1654 { "net-prohib", IPFY_ICMPC_NETPRO }, 1655 { "net-tos", IPFY_ICMPC_NETTOS }, 1656 { "host-preced", IPFY_ICMPC_HSTPRE }, 1657 { "host-prohib", IPFY_ICMPC_HSTPRO }, 1658 { "host-tos", IPFY_ICMPC_HSTTOS }, 1659 { "host-unk", IPFY_ICMPC_HSTUNK }, 1660 { "host-unr", IPFY_ICMPC_HSTUNR }, 1661 { "net-unk", IPFY_ICMPC_NETUNK }, 1662 { "net-unr", IPFY_ICMPC_NETUNR }, 1663 { "port-unr", IPFY_ICMPC_PORUNR }, 1664 { "proto-unr", IPFY_ICMPC_PROUNR }, 1665 { "srcfail", IPFY_ICMPC_SRCFAIL }, 1666 { NULL, 0 }, 1667 }; 1668 1669 static struct wordtab ipv4optwords[25] = { 1670 { "addext", IPFY_IPOPT_ADDEXT }, 1671 { "cipso", IPFY_IPOPT_CIPSO }, 1672 { "dps", IPFY_IPOPT_DPS }, 1673 { "e-sec", IPFY_IPOPT_ESEC }, 1674 { "eip", IPFY_IPOPT_EIP }, 1675 { "encode", IPFY_IPOPT_ENCODE }, 1676 { "finn", IPFY_IPOPT_FINN }, 1677 { "imitd", IPFY_IPOPT_IMITD }, 1678 { "lsrr", IPFY_IPOPT_LSRR }, 1679 { "mtup", IPFY_IPOPT_MTUP }, 1680 { "mtur", IPFY_IPOPT_MTUR }, 1681 { "nop", IPFY_IPOPT_NOP }, 1682 { "nsapa", IPFY_IPOPT_NSAPA }, 1683 { "rr", IPFY_IPOPT_RR }, 1684 { "rtralrt", IPFY_IPOPT_RTRALRT }, 1685 { "satid", IPFY_IPOPT_SATID }, 1686 { "sdb", IPFY_IPOPT_SDB }, 1687 { "sec", IPFY_IPOPT_SEC }, 1688 { "ssrr", IPFY_IPOPT_SSRR }, 1689 { "tr", IPFY_IPOPT_TR }, 1690 { "ts", IPFY_IPOPT_TS }, 1691 { "ump", IPFY_IPOPT_UMP }, 1692 { "visa", IPFY_IPOPT_VISA }, 1693 { "zsu", IPFY_IPOPT_ZSU }, 1694 { NULL, 0 }, 1695 }; 1696 1697 static struct wordtab ipv4secwords[9] = { 1698 { "confid", IPFY_SEC_CONF }, 1699 { "reserv-1", IPFY_SEC_RSV1 }, 1700 { "reserv-2", IPFY_SEC_RSV2 }, 1701 { "reserv-3", IPFY_SEC_RSV3 }, 1702 { "reserv-4", IPFY_SEC_RSV4 }, 1703 { "secret", IPFY_SEC_SEC }, 1704 { "topsecret", IPFY_SEC_TS }, 1705 { "unclass", IPFY_SEC_UNC }, 1706 { NULL, 0 }, 1707 }; 1708 1709 static struct wordtab ipv6optwords[8] = { 1710 { "dstopts", IPFY_IPV6OPT_DSTOPTS }, 1711 { "esp", IPFY_ESP }, 1712 { "frag", IPFY_FRAG }, 1713 { "hopopts", IPFY_IPV6OPT_HOPOPTS }, 1714 { "ipv6", IPFY_IPV6OPT_IPV6 }, 1715 { "none", IPFY_IPV6OPT_NONE }, 1716 { "routing", IPFY_IPV6OPT_ROUTING }, 1717 { NULL, 0 }, 1718 }; 1719 1720 static struct wordtab logwords[33] = { 1721 { "kern", IPFY_FAC_KERN }, 1722 { "user", IPFY_FAC_USER }, 1723 { "mail", IPFY_FAC_MAIL }, 1724 { "daemon", IPFY_FAC_DAEMON }, 1725 { "auth", IPFY_FAC_AUTH }, 1726 { "syslog", IPFY_FAC_SYSLOG }, 1727 { "lpr", IPFY_FAC_LPR }, 1728 { "news", IPFY_FAC_NEWS }, 1729 { "uucp", IPFY_FAC_UUCP }, 1730 { "cron", IPFY_FAC_CRON }, 1731 { "ftp", IPFY_FAC_FTP }, 1732 { "authpriv", IPFY_FAC_AUTHPRIV }, 1733 { "audit", IPFY_FAC_AUDIT }, 1734 { "logalert", IPFY_FAC_LFMT }, 1735 { "console", IPFY_FAC_CONSOLE }, 1736 { "security", IPFY_FAC_SECURITY }, 1737 { "local0", IPFY_FAC_LOCAL0 }, 1738 { "local1", IPFY_FAC_LOCAL1 }, 1739 { "local2", IPFY_FAC_LOCAL2 }, 1740 { "local3", IPFY_FAC_LOCAL3 }, 1741 { "local4", IPFY_FAC_LOCAL4 }, 1742 { "local5", IPFY_FAC_LOCAL5 }, 1743 { "local6", IPFY_FAC_LOCAL6 }, 1744 { "local7", IPFY_FAC_LOCAL7 }, 1745 { "emerg", IPFY_PRI_EMERG }, 1746 { "alert", IPFY_PRI_ALERT }, 1747 { "crit", IPFY_PRI_CRIT }, 1748 { "err", IPFY_PRI_ERR }, 1749 { "warn", IPFY_PRI_WARN }, 1750 { "notice", IPFY_PRI_NOTICE }, 1751 { "info", IPFY_PRI_INFO }, 1752 { "debug", IPFY_PRI_DEBUG }, 1753 { NULL, 0 }, 1754 }; 1755 1756 1757 1758 1759 int ipf_parsefile(fd, addfunc, iocfuncs, filename) 1760 int fd; 1761 addfunc_t addfunc; 1762 ioctlfunc_t *iocfuncs; 1763 char *filename; 1764 { 1765 FILE *fp = NULL; 1766 char *s; 1767 1768 yylineNum = 1; 1769 yysettab(ipfwords); 1770 1771 s = getenv("YYDEBUG"); 1772 if (s != NULL) 1773 yydebug = atoi(s); 1774 else 1775 yydebug = 0; 1776 1777 if (strcmp(filename, "-")) { 1778 fp = fopen(filename, "r"); 1779 if (fp == NULL) { 1780 fprintf(stderr, "fopen(%s) failed: %s\n", filename, 1781 STRERROR(errno)); 1782 return -1; 1783 } 1784 } else 1785 fp = stdin; 1786 1787 while (ipf_parsesome(fd, addfunc, iocfuncs, fp) == 1) 1788 ; 1789 if (fp != NULL) 1790 fclose(fp); 1791 return 0; 1792 } 1793 1794 1795 int ipf_parsesome(fd, addfunc, iocfuncs, fp) 1796 int fd; 1797 addfunc_t addfunc; 1798 ioctlfunc_t *iocfuncs; 1799 FILE *fp; 1800 { 1801 char *s; 1802 int i; 1803 1804 ipffd = fd; 1805 for (i = 0; i <= IPL_LOGMAX; i++) 1806 ipfioctl[i] = iocfuncs[i]; 1807 ipfaddfunc = addfunc; 1808 1809 if (feof(fp)) 1810 return 0; 1811 i = fgetc(fp); 1812 if (i == EOF) 1813 return 0; 1814 if (ungetc(i, fp) == 0) 1815 return 0; 1816 if (feof(fp)) 1817 return 0; 1818 s = getenv("YYDEBUG"); 1819 if (s != NULL) 1820 yydebug = atoi(s); 1821 else 1822 yydebug = 0; 1823 1824 yyin = fp; 1825 yyparse(); 1826 return 1; 1827 } 1828 1829 1830 static void newrule() 1831 { 1832 frentry_t *frn; 1833 1834 frn = (frentry_t *)calloc(1, sizeof(frentry_t)); 1835 if (frn == NULL) 1836 yyerror("sorry, out of memory"); 1837 for (fr = frtop; fr != NULL && fr->fr_next != NULL; fr = fr->fr_next) 1838 ; 1839 if (fr != NULL) 1840 fr->fr_next = frn; 1841 if (frtop == NULL) 1842 frtop = frn; 1843 fr = frn; 1844 frc = frn; 1845 fr->fr_loglevel = 0xffff; 1846 fr->fr_isc = (void *)-1; 1847 fr->fr_logtag = FR_NOLOGTAG; 1848 fr->fr_type = FR_T_NONE; 1849 if (use_inet6 != 0) 1850 fr->fr_v = 6; 1851 else 1852 fr->fr_v = 4; 1853 1854 nrules = 1; 1855 } 1856 1857 1858 static void setipftype() 1859 { 1860 for (fr = frc; fr != NULL; fr = fr->fr_next) { 1861 if (fr->fr_type == FR_T_NONE) { 1862 fr->fr_type = FR_T_IPF; 1863 fr->fr_data = (void *)calloc(sizeof(fripf_t), 1); 1864 if (fr->fr_data == NULL) 1865 yyerror("sorry, out of memory"); 1866 fr->fr_dsize = sizeof(fripf_t); 1867 fr->fr_ip.fi_v = frc->fr_v; 1868 fr->fr_mip.fi_v = 0xf; 1869 fr->fr_ipf->fri_sifpidx = -1; 1870 fr->fr_ipf->fri_difpidx = -1; 1871 } 1872 if (fr->fr_type != FR_T_IPF) { 1873 fprintf(stderr, "IPF Type not set\n"); 1874 } 1875 } 1876 } 1877 1878 1879 static frentry_t *addrule() 1880 { 1881 frentry_t *f, *f1, *f2; 1882 int count; 1883 1884 for (f2 = frc; f2->fr_next != NULL; f2 = f2->fr_next) 1885 ; 1886 1887 count = nrules; 1888 if (count == 0) { 1889 f = (frentry_t *)calloc(sizeof(*f), 1); 1890 if (f == NULL) 1891 yyerror("sorry, out of memory"); 1892 added++; 1893 f2->fr_next = f; 1894 bcopy(f2, f, sizeof(*f)); 1895 if (f2->fr_caddr != NULL) { 1896 f->fr_caddr = malloc(f->fr_dsize); 1897 if (f->fr_caddr == NULL) 1898 yyerror("sorry, out of memory"); 1899 bcopy(f2->fr_caddr, f->fr_caddr, f->fr_dsize); 1900 } 1901 f->fr_next = NULL; 1902 return f; 1903 } 1904 f = f2; 1905 for (f1 = frc; count > 0; count--, f1 = f1->fr_next) { 1906 f->fr_next = (frentry_t *)calloc(sizeof(*f), 1); 1907 if (f->fr_next == NULL) 1908 yyerror("sorry, out of memory"); 1909 added++; 1910 f = f->fr_next; 1911 bcopy(f1, f, sizeof(*f)); 1912 f->fr_next = NULL; 1913 if (f->fr_caddr != NULL) { 1914 f->fr_caddr = malloc(f->fr_dsize); 1915 if (f->fr_caddr == NULL) 1916 yyerror("sorry, out of memory"); 1917 bcopy(f1->fr_caddr, f->fr_caddr, f->fr_dsize); 1918 } 1919 } 1920 1921 return f2->fr_next; 1922 } 1923 1924 1925 static u_32_t lookuphost(name) 1926 char *name; 1927 { 1928 u_32_t addr; 1929 int i; 1930 1931 hashed = 0; 1932 pooled = 0; 1933 dynamic = -1; 1934 1935 for (i = 0; i < 4; i++) { 1936 if (strncmp(name, frc->fr_ifnames[i], 1937 sizeof(frc->fr_ifnames[i])) == 0) { 1938 ifpflag = FRI_DYNAMIC; 1939 dynamic = i; 1940 return 0; 1941 } 1942 } 1943 1944 if (gethost(name, &addr) == -1) { 1945 fprintf(stderr, "unknown name \"%s\"\n", name); 1946 return 0; 1947 } 1948 return addr; 1949 } 1950 1951 1952 static void dobpf(v, phrase) 1953 int v; 1954 char *phrase; 1955 { 1956 #ifdef IPFILTER_BPF 1957 struct bpf_program bpf; 1958 struct pcap *p; 1959 #endif 1960 fakebpf_t *fb; 1961 u_32_t l; 1962 char *s; 1963 int i; 1964 1965 for (fr = frc; fr != NULL; fr = fr->fr_next) { 1966 if (fr->fr_type != FR_T_NONE) { 1967 fprintf(stderr, "cannot mix IPF and BPF matching\n"); 1968 return; 1969 } 1970 fr->fr_v = v; 1971 fr->fr_type = FR_T_BPFOPC; 1972 1973 if (!strncmp(phrase, "\"0x", 2)) { 1974 phrase++; 1975 fb = malloc(sizeof(fakebpf_t)); 1976 if (fb == NULL) 1977 yyerror("sorry, out of memory"); 1978 1979 for (i = 0, s = strtok(phrase, " \r\n\t"); s != NULL; 1980 s = strtok(NULL, " \r\n\t"), i++) { 1981 fb = realloc(fb, (i / 4 + 1) * sizeof(*fb)); 1982 if (fb == NULL) 1983 yyerror("sorry, out of memory"); 1984 l = (u_32_t)strtol(s, NULL, 0); 1985 switch (i & 3) 1986 { 1987 case 0 : 1988 fb[i / 4].fb_c = l & 0xffff; 1989 break; 1990 case 1 : 1991 fb[i / 4].fb_t = l & 0xff; 1992 break; 1993 case 2 : 1994 fb[i / 4].fb_f = l & 0xff; 1995 break; 1996 case 3 : 1997 fb[i / 4].fb_k = l; 1998 break; 1999 } 2000 } 2001 if ((i & 3) != 0) { 2002 fprintf(stderr, 2003 "Odd number of bytes in BPF code\n"); 2004 exit(1); 2005 } 2006 i--; 2007 fr->fr_dsize = (i / 4 + 1) * sizeof(*fb); 2008 fr->fr_data = fb; 2009 return; 2010 } 2011 2012 #ifdef IPFILTER_BPF 2013 bzero((char *)&bpf, sizeof(bpf)); 2014 p = pcap_open_dead(DLT_RAW, 1); 2015 if (!p) { 2016 fprintf(stderr, "pcap_open_dead failed\n"); 2017 return; 2018 } 2019 2020 if (pcap_compile(p, &bpf, phrase, 1, 0xffffffff)) { 2021 pcap_perror(p, "ipf"); 2022 pcap_close(p); 2023 fprintf(stderr, "pcap parsing failed (%s)\n", phrase); 2024 return; 2025 } 2026 pcap_close(p); 2027 2028 fr->fr_dsize = bpf.bf_len * sizeof(struct bpf_insn); 2029 fr->fr_data = malloc(fr->fr_dsize); 2030 if (fr->fr_data == NULL) 2031 yyerror("sorry, out of memory"); 2032 bcopy((char *)bpf.bf_insns, fr->fr_data, fr->fr_dsize); 2033 if (!bpf_validate(fr->fr_data, bpf.bf_len)) { 2034 fprintf(stderr, "BPF validation failed\n"); 2035 return; 2036 } 2037 #endif 2038 } 2039 2040 #ifdef IPFILTER_BPF 2041 if (opts & OPT_DEBUG) 2042 bpf_dump(&bpf, 0); 2043 #else 2044 fprintf(stderr, "BPF filter expressions not supported\n"); 2045 exit(1); 2046 #endif 2047 } 2048 2049 2050 static void resetaddr() 2051 { 2052 hashed = 0; 2053 pooled = 0; 2054 dynamic = -1; 2055 } 2056 2057 2058 static alist_t *newalist(ptr) 2059 alist_t *ptr; 2060 { 2061 alist_t *al; 2062 2063 al = malloc(sizeof(*al)); 2064 if (al == NULL) 2065 return NULL; 2066 al->al_not = 0; 2067 al->al_next = ptr; 2068 return al; 2069 } 2070 2071 2072 static int makepool(list) 2073 alist_t *list; 2074 { 2075 ip_pool_node_t *n, *top; 2076 ip_pool_t pool; 2077 alist_t *a; 2078 int num; 2079 2080 if (list == NULL) 2081 return 0; 2082 top = calloc(1, sizeof(*top)); 2083 if (top == NULL) 2084 return 0; 2085 2086 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2087 n->ipn_addr.adf_family = a->al_family; 2088 n->ipn_mask.adf_family = a->al_family; 2089 (void *)bcopy((void *)&a->al_i6addr, 2090 (void *)&n->ipn_addr.adf_addr, 2091 sizeof(n->ipn_addr.adf_addr)); 2092 (void *)bcopy((void *)&a->al_i6mask, 2093 (void *)&n->ipn_mask.adf_addr, 2094 sizeof(n->ipn_mask.adf_addr)); 2095 n->ipn_info = a->al_not; 2096 if (a->al_next != NULL) { 2097 n->ipn_next = calloc(1, sizeof(*n)); 2098 if (n->ipn_next == NULL) 2099 yyerror("sorry, out of memory"); 2100 n = n->ipn_next; 2101 } 2102 } 2103 2104 bzero((char *)&pool, sizeof(pool)); 2105 pool.ipo_unit = IPL_LOGIPF; 2106 pool.ipo_list = top; 2107 num = load_pool(&pool, ipfioctl[IPL_LOGLOOKUP]); 2108 2109 while ((n = top) != NULL) { 2110 top = n->ipn_next; 2111 free(n); 2112 } 2113 return num; 2114 } 2115 2116 2117 static u_int makehash(list) 2118 alist_t *list; 2119 { 2120 iphtent_t *n, *top; 2121 iphtable_t iph; 2122 alist_t *a; 2123 int num; 2124 2125 if (list == NULL) 2126 return 0; 2127 top = calloc(1, sizeof(*top)); 2128 if (top == NULL) 2129 return 0; 2130 2131 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2132 n->ipe_family = a->al_family; 2133 (void *)bcopy((void *)&a->al_i6addr, 2134 (void *)&n->ipe_addr, 2135 sizeof(n->ipe_addr)); 2136 (void *)bcopy((void *)&a->al_i6mask, 2137 (void *)&n->ipe_mask, 2138 sizeof(n->ipe_mask)); 2139 n->ipe_value = 0; 2140 if (a->al_next != NULL) { 2141 n->ipe_next = calloc(1, sizeof(*n)); 2142 if (n->ipe_next == NULL) 2143 yyerror("sorry, out of memory"); 2144 n = n->ipe_next; 2145 } 2146 } 2147 2148 bzero((char *)&iph, sizeof(iph)); 2149 iph.iph_unit = IPL_LOGIPF; 2150 iph.iph_type = IPHASH_LOOKUP; 2151 *iph.iph_name = '\0'; 2152 2153 if (load_hash(&iph, top, ipfioctl[IPL_LOGLOOKUP]) == 0) 2154 sscanf(iph.iph_name, "%u", &num); 2155 else 2156 num = 0; 2157 2158 while ((n = top) != NULL) { 2159 top = n->ipe_next; 2160 free(n); 2161 } 2162 return num; 2163 } 2164 2165 2166 void ipf_addrule(fd, ioctlfunc, ptr) 2167 int fd; 2168 ioctlfunc_t ioctlfunc; 2169 void *ptr; 2170 { 2171 ioctlcmd_t add, del; 2172 frentry_t *fr; 2173 ipfobj_t obj; 2174 2175 fr = ptr; 2176 add = 0; 2177 del = 0; 2178 2179 bzero((char *)&obj, sizeof(obj)); 2180 obj.ipfo_rev = IPFILTER_VERSION; 2181 obj.ipfo_size = sizeof(*fr); 2182 obj.ipfo_type = IPFOBJ_FRENTRY; 2183 obj.ipfo_ptr = ptr; 2184 2185 if ((opts & OPT_DONOTHING) != 0) 2186 fd = -1; 2187 2188 if (opts & OPT_ZERORULEST) { 2189 add = SIOCZRLST; 2190 } else if (opts & OPT_INACTIVE) { 2191 add = (u_int)fr->fr_hits ? SIOCINIFR : 2192 SIOCADIFR; 2193 del = SIOCRMIFR; 2194 } else { 2195 add = (u_int)fr->fr_hits ? SIOCINAFR : 2196 SIOCADAFR; 2197 del = SIOCRMAFR; 2198 } 2199 2200 if (fr && (opts & OPT_OUTQUE)) 2201 fr->fr_flags |= FR_OUTQUE; 2202 if (fr->fr_hits) 2203 fr->fr_hits--; 2204 if (fr && (opts & OPT_VERBOSE)) 2205 printfr(fr, ioctlfunc); 2206 2207 if (opts & OPT_DEBUG) { 2208 binprint(fr, sizeof(*fr)); 2209 if (fr->fr_data != NULL) 2210 binprint(fr->fr_data, fr->fr_dsize); 2211 } 2212 2213 if ((opts & OPT_ZERORULEST) != 0) { 2214 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2215 if ((opts & OPT_DONOTHING) == 0) { 2216 fprintf(stderr, "%d:", yylineNum); 2217 perror("ioctl(SIOCZRLST)"); 2218 } 2219 } else { 2220 #ifdef USE_QUAD_T 2221 printf("hits %qd bytes %qd ", 2222 (long long)fr->fr_hits, 2223 (long long)fr->fr_bytes); 2224 #else 2225 printf("hits %ld bytes %ld ", 2226 fr->fr_hits, fr->fr_bytes); 2227 #endif 2228 printfr(fr, ioctlfunc); 2229 } 2230 } else if ((opts & OPT_REMOVE) != 0) { 2231 if ((*ioctlfunc)(fd, del, (void *)&obj) == -1) { 2232 if ((opts & OPT_DONOTHING) != 0) { 2233 fprintf(stderr, "%d:", yylineNum); 2234 perror("ioctl(delete rule)"); 2235 } 2236 } 2237 } else { 2238 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2239 if (!(opts & OPT_DONOTHING)) { 2240 fprintf(stderr, "%d:", yylineNum); 2241 perror("ioctl(add/insert rule)"); 2242 } 2243 } 2244 } 2245 } 2246 2247 static void setsyslog() 2248 { 2249 yysetdict(logwords); 2250 yybreakondot = 1; 2251 } 2252 2253 2254 static void unsetsyslog() 2255 { 2256 yyresetdict(); 2257 yybreakondot = 0; 2258 } 2259 2260 2261 static void fillgroup(fr) 2262 frentry_t *fr; 2263 { 2264 frentry_t *f; 2265 2266 for (f = frold; f != NULL; f = f->fr_next) 2267 if (strncmp(f->fr_grhead, fr->fr_group, FR_GROUPLEN) == 0) 2268 break; 2269 if (f == NULL) 2270 return; 2271 2272 /* 2273 * Only copy down matching fields if the rules are of the same type 2274 * and are of ipf type. The only fields that are copied are those 2275 * that impact the rule parsing itself, eg. need for knowing what the 2276 * protocol should be for rules with port comparisons in them. 2277 */ 2278 if (f->fr_type != fr->fr_type || f->fr_type != FR_T_IPF) 2279 return; 2280 2281 if (fr->fr_v == 0 && f->fr_v != 0) 2282 fr->fr_v = f->fr_v; 2283 2284 if (fr->fr_mproto == 0 && f->fr_mproto != 0) 2285 fr->fr_mproto = f->fr_mproto; 2286 if (fr->fr_proto == 0 && f->fr_proto != 0) 2287 fr->fr_proto = f->fr_proto; 2288 2289 if ((fr->fr_mproto == 0) && ((fr->fr_flx & FI_TCPUDP) == 0) && 2290 ((f->fr_flx & FI_TCPUDP) != 0)) 2291 fr->fr_flx |= FI_TCPUDP; 2292 } 2293