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 *, i6addr_t *)); 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> ipv4 ipv4_16 ipv4_24 110 %type <ip6> hostname mask 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 %token IPFY_SET_LOOPBACK IPFY_SET 181 %% 182 file: line 183 | assign 184 | file line 185 | file assign 186 ; 187 188 line: xx rule { while ((fr = frtop) != NULL) { 189 frtop = fr->fr_next; 190 fr->fr_next = NULL; 191 (*ipfaddfunc)(ipffd, ipfioctl[IPL_LOGIPF], fr); 192 fr->fr_next = frold; 193 frold = fr; 194 } 195 resetlexer(); 196 } 197 | YY_COMMENT 198 | set 199 ; 200 201 xx: { newrule(); } 202 ; 203 204 assign: YY_STR assigning YY_STR ';' { set_variable($1, $3); 205 resetlexer(); 206 free($1); 207 free($3); 208 } 209 ; 210 211 assigning: 212 '=' { yyvarnext = 1; } 213 ; 214 215 set: 216 IPFY_SET IPFY_SET_LOOPBACK YY_STR ';' 217 { 218 int data; 219 if (frold != NULL) { 220 yyerror("ipf rules before \"set\""); 221 return 0; 222 } 223 if (!strcmp($3, "true")) 224 data = 1; 225 else if (!strcmp($3, "false")) 226 data = 0; 227 else { 228 yyerror("invalid argument for ipf_loopback"); 229 return 0; 230 } 231 if (((opts & OPT_DONOTHING) == 0) && 232 (ioctl(ipffd, SIOCIPFLP, &data) == -1)) 233 perror("ioctl(SIOCIPFLP)"); 234 } 235 ; 236 237 rule: inrule eol 238 | outrule eol 239 ; 240 241 eol: | ';' 242 ; 243 244 inrule: 245 rulehead markin { ruleopts = 0; } inopts rulemain ruletail intag ruletail2 246 ; 247 248 outrule: 249 rulehead markout { ruleopts = 0; } outopts rulemain ruletail outtag ruletail2 250 ; 251 252 rulehead: 253 collection action 254 | insert collection action 255 ; 256 257 markin: IPFY_IN { fr->fr_flags |= FR_INQUE; } 258 ; 259 260 markout: 261 IPFY_OUT { fr->fr_flags |= FR_OUTQUE; } 262 ; 263 264 rulemain: 265 ipfrule 266 | bpfrule 267 ; 268 269 ipfrule: 270 tos ttl proto ip 271 ; 272 273 bpfrule: 274 IPFY_BPFV4 '{' YY_STR '}' { dobpf(4, $3); free($3); } 275 | IPFY_BPFV6 '{' YY_STR '}' { dobpf(6, $3); free($3); } 276 ; 277 278 ruletail: 279 with keep head group 280 ; 281 282 ruletail2: 283 pps age new 284 ; 285 286 intag: settagin matchtagin 287 ; 288 289 outtag: settagout matchtagout 290 ; 291 292 insert: 293 '@' YY_NUMBER { fr->fr_hits = (U_QUAD_T)$2 + 1; } 294 ; 295 296 collection: 297 | YY_NUMBER { fr->fr_collect = $1; } 298 ; 299 300 action: block 301 | IPFY_PASS { fr->fr_flags |= FR_PASS; } 302 | log 303 | IPFY_COUNT { fr->fr_flags |= FR_ACCOUNT; } 304 | auth 305 | IPFY_SKIP YY_NUMBER { fr->fr_flags |= FR_SKIP; 306 fr->fr_arg = $2; } 307 | IPFY_CALL func 308 | IPFY_CALL IPFY_NOW func { fr->fr_flags |= FR_CALLNOW; } 309 ; 310 311 block: blocked 312 | blocked blockreturn 313 ; 314 315 blocked: 316 IPFY_BLOCK { fr->fr_flags = FR_BLOCK; } 317 ; 318 blockreturn: 319 IPFY_RETICMP { fr->fr_flags |= FR_RETICMP; } 320 | IPFY_RETICMP returncode { fr->fr_flags |= FR_RETICMP; } 321 | IPFY_RETICMPASDST { fr->fr_flags |= FR_FAKEICMP; } 322 | IPFY_RETICMPASDST returncode { fr->fr_flags |= FR_FAKEICMP; } 323 | IPFY_RETRST { fr->fr_flags |= FR_RETRST; } 324 ; 325 326 log: IPFY_LOG { fr->fr_flags |= FR_LOG; } 327 | IPFY_LOG logoptions { fr->fr_flags |= FR_LOG; } 328 ; 329 330 auth: IPFY_AUTH { fr->fr_flags |= FR_AUTH; } 331 | IPFY_AUTH IPFY_RETRST { fr->fr_flags |= (FR_AUTH|FR_RETRST);} 332 | IPFY_PREAUTH { fr->fr_flags |= FR_PREAUTH; } 333 ; 334 335 func: YY_STR '/' YY_NUMBER { fr->fr_func = nametokva($1, 336 ipfioctl[IPL_LOGIPF]); 337 fr->fr_arg = $3; 338 free($1); } 339 ; 340 341 inopts: 342 | inopts inopt 343 ; 344 345 inopt: 346 logopt 347 { 348 if ( ruleopts & OPTION_LOG ) 349 yyerror("Duplicate log option"); 350 ruleopts |= OPTION_LOG; 351 } 352 | quick 353 { 354 if ( ruleopts & OPTION_QUICK ) 355 yyerror("Duplicate quick option"); 356 ruleopts |= OPTION_QUICK; 357 } 358 | on 359 { 360 if ( ruleopts & OPTION_ON ) 361 yyerror("Duplicate on option"); 362 ruleopts |= OPTION_ON; 363 } 364 | dup 365 { 366 if ( ruleopts & OPTION_DUP ) 367 yyerror("Duplicate dup option"); 368 ruleopts |= OPTION_DUP; 369 } 370 | froute 371 { 372 if ( ruleopts & OPTION_FROUTE ) 373 yyerror("Duplicate froute option"); 374 ruleopts |= OPTION_FROUTE; 375 } 376 | proute 377 { 378 if ( ruleopts & OPTION_PROUTE ) 379 yyerror("Duplicate proute option"); 380 ruleopts |= OPTION_PROUTE; 381 } 382 | replyto 383 { 384 if ( ruleopts & OPTION_REPLYTO ) 385 yyerror("Duplicate replyto option"); 386 ruleopts |= OPTION_REPLYTO; 387 } 388 ; 389 390 outopts: 391 | outopts outopt 392 ; 393 394 outopt: 395 logopt 396 { 397 if ( ruleopts & OPTION_LOG ) 398 yyerror("Duplicate log option"); 399 ruleopts |= OPTION_LOG; 400 } 401 | quick 402 { 403 if ( ruleopts & OPTION_QUICK ) 404 yyerror("Duplicate quick option"); 405 ruleopts |= OPTION_QUICK; 406 } 407 | on 408 { 409 if ( ruleopts & OPTION_ON ) 410 yyerror("Duplicate on option"); 411 ruleopts |= OPTION_ON; 412 } 413 | dup 414 { 415 if ( ruleopts & OPTION_DUP ) 416 yyerror("Duplicate dup option"); 417 ruleopts |= OPTION_DUP; 418 } 419 | proute 420 { 421 if ( ruleopts & OPTION_PROUTE ) 422 yyerror("Duplicate proute option"); 423 ruleopts |= OPTION_PROUTE; 424 } 425 | replyto 426 { 427 if ( ruleopts & OPTION_REPLYTO ) 428 yyerror("Duplicate replyto option"); 429 ruleopts |= OPTION_REPLYTO; 430 } 431 ; 432 433 tos: | settos YY_NUMBER { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 434 | settos YY_HEX { DOALL(fr->fr_tos = $2; fr->fr_mtos = 0xff;) } 435 | settos lstart toslist lend 436 ; 437 438 settos: IPFY_TOS { setipftype(); } 439 ; 440 441 toslist: 442 YY_NUMBER { DOALL(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 443 | YY_HEX { DOREM(fr->fr_tos = $1; fr->fr_mtos = 0xff;) } 444 | toslist lmore YY_NUMBER 445 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 446 | toslist lmore YY_HEX 447 { DOREM(fr->fr_tos = $3; fr->fr_mtos = 0xff;) } 448 ; 449 450 ttl: | setttl YY_NUMBER 451 { DOALL(fr->fr_ttl = $2; fr->fr_mttl = 0xff;) } 452 | setttl lstart ttllist lend 453 ; 454 455 lstart: '(' { newlist = 1; fr = frc; added = 0; } 456 ; 457 458 lend: ')' { nrules += added; } 459 ; 460 461 lmore: lanother { if (newlist == 1) { 462 newlist = 0; 463 } 464 fr = addrule(); 465 if (yycont != NULL) 466 *yycont = 1; 467 } 468 ; 469 470 lanother: 471 | ',' 472 ; 473 474 setttl: IPFY_TTL { setipftype(); } 475 ; 476 477 ttllist: 478 YY_NUMBER { DOREM(fr->fr_ttl = $1; fr->fr_mttl = 0xff;) } 479 | ttllist lmore YY_NUMBER 480 { DOREM(fr->fr_ttl = $3; fr->fr_mttl = 0xff;) } 481 ; 482 483 proto: | protox protocol { yyresetdict(); } 484 ; 485 486 protox: IPFY_PROTO { setipftype(); 487 fr = frc; 488 yysetdict(NULL); } 489 ; 490 491 ip: srcdst flags icmp 492 ; 493 494 group: | IPFY_GROUP YY_STR { DOALL(strncpy(fr->fr_group, $2, \ 495 FR_GROUPLEN); \ 496 fillgroup(fr);); 497 free($2); } 498 | IPFY_GROUP YY_NUMBER { DOALL(sprintf(fr->fr_group, "%d", \ 499 $2); \ 500 fillgroup(fr);) } 501 ; 502 503 head: | IPFY_HEAD YY_STR { DOALL(strncpy(fr->fr_grhead, $2, \ 504 FR_GROUPLEN);); 505 free($2); } 506 | IPFY_HEAD YY_NUMBER { DOALL(sprintf(fr->fr_grhead, "%d", \ 507 $2);) } 508 ; 509 510 settagin: 511 | IPFY_SETTAG '(' taginlist ')' 512 ; 513 514 taginlist: 515 taginspec 516 | taginlist ',' taginspec 517 ; 518 519 taginspec: 520 logtag 521 |nattag 522 ; 523 524 nattag: IPFY_NAT '=' YY_STR { DOALL(strncpy(fr->fr_nattag.ipt_tag,\ 525 $3, IPFTAG_LEN);); 526 free($3); } 527 | IPFY_NAT '=' YY_NUMBER { DOALL(sprintf(fr->fr_nattag.ipt_tag,\ 528 "%d", $3 & 0xffffffff);) } 529 ; 530 531 logtag: IPFY_LOG '=' YY_NUMBER { DOALL(fr->fr_logtag = $3;) } 532 ; 533 534 settagout: 535 | IPFY_SETTAG '(' tagoutlist ')' 536 ; 537 538 tagoutlist: 539 tagoutspec 540 | tagoutlist ',' tagoutspec 541 ; 542 543 tagoutspec: 544 logtag 545 | nattag 546 ; 547 548 matchtagin: 549 | IPFY_MATCHTAG '(' tagoutlist ')' 550 ; 551 552 matchtagout: 553 | IPFY_MATCHTAG '(' taginlist ')' 554 ; 555 556 pps: | IPFY_PPS YY_NUMBER { DOALL(fr->fr_pps = $2;) } 557 ; 558 559 new: | savegroup file restoregroup 560 ; 561 562 savegroup: 563 '{' 564 ; 565 566 restoregroup: 567 '}' 568 ; 569 570 logopt: log 571 ; 572 573 quick: 574 IPFY_QUICK { fr->fr_flags |= FR_QUICK; } 575 ; 576 577 on: IPFY_ON onname 578 | IPFY_ON onname IPFY_INVIA vianame 579 | IPFY_ON onname IPFY_OUTVIA vianame 580 ; 581 582 onname: interfacename 583 { strncpy(fr->fr_ifnames[0], $1, sizeof(fr->fr_ifnames[0])); 584 free($1); 585 } 586 | interfacename ',' interfacename 587 { strncpy(fr->fr_ifnames[0], $1, sizeof(fr->fr_ifnames[0])); 588 free($1); 589 strncpy(fr->fr_ifnames[1], $3, sizeof(fr->fr_ifnames[1])); 590 free($3); 591 } 592 ; 593 594 vianame: 595 name 596 { strncpy(fr->fr_ifnames[2], $1, sizeof(fr->fr_ifnames[2])); 597 free($1); 598 } 599 | name ',' name 600 { strncpy(fr->fr_ifnames[2], $1, sizeof(fr->fr_ifnames[2])); 601 free($1); 602 strncpy(fr->fr_ifnames[3], $3, sizeof(fr->fr_ifnames[3])); 603 free($3); 604 } 605 ; 606 607 dup: IPFY_DUPTO name 608 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 609 free($2); 610 } 611 | IPFY_DUPTO name duptoseparator hostname 612 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 613 if (use_inet6 == 0) 614 fr->fr_dif.fd_ip = $4.in4; 615 else 616 bcopy(&$4, &fr->fr_dif.fd_ip6, sizeof(fr->fr_dif.fd_ip6)); 617 yyexpectaddr = 0; 618 free($2); 619 } 620 | IPFY_DUPTO name duptoseparator YY_IPV6 621 { strncpy(fr->fr_dif.fd_ifname, $2, sizeof(fr->fr_dif.fd_ifname)); 622 bcopy(&$4, &fr->fr_dif.fd_ip6, sizeof(fr->fr_dif.fd_ip6)); 623 yyexpectaddr = 0; 624 free($2); 625 } 626 ; 627 628 duptoseparator: 629 ':' { yyexpectaddr = 1; yycont = &yyexpectaddr; resetaddr(); } 630 ; 631 632 froute: IPFY_FROUTE { fr->fr_flags |= FR_FASTROUTE; } 633 ; 634 635 proute: routeto name 636 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 637 free($2); 638 } 639 | routeto name duptoseparator hostname 640 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 641 if (use_inet6 == 0) 642 fr->fr_tif.fd_ip = $4.in4; 643 else 644 bcopy(&$4, &fr->fr_tif.fd_ip6, sizeof(fr->fr_tif.fd_ip6)); 645 yyexpectaddr = 0; 646 free($2); 647 } 648 | routeto name duptoseparator YY_IPV6 649 { strncpy(fr->fr_tif.fd_ifname, $2, sizeof(fr->fr_tif.fd_ifname)); 650 bcopy(&$4, &fr->fr_tif.fd_ip6, sizeof(fr->fr_tif.fd_ip6)); 651 yyexpectaddr = 0; 652 free($2); 653 } 654 ; 655 656 routeto: 657 IPFY_TO 658 | IPFY_ROUTETO 659 ; 660 661 replyto: 662 IPFY_REPLY_TO name 663 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 664 free($2); 665 } 666 | IPFY_REPLY_TO name duptoseparator hostname 667 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 668 if (use_inet6 == 0) 669 fr->fr_rif.fd_ip = $4.in4; 670 else 671 bcopy(&$4, &fr->fr_rif.fd_ip6, sizeof(fr->fr_rif.fd_ip6)); 672 yyexpectaddr = 0; 673 free($2); 674 } 675 | IPFY_REPLY_TO name duptoseparator YY_IPV6 676 { strncpy(fr->fr_rif.fd_ifname, $2, sizeof(fr->fr_rif.fd_ifname)); 677 bcopy(&$4, &fr->fr_rif.fd_ip6, sizeof(fr->fr_rif.fd_ip6)); 678 yyexpectaddr = 0; 679 free($2); 680 } 681 ; 682 683 logoptions: 684 logoption 685 | logoptions logoption 686 ; 687 688 logoption: 689 IPFY_BODY { fr->fr_flags |= FR_LOGBODY; } 690 | IPFY_FIRST { fr->fr_flags |= FR_LOGFIRST; } 691 | IPFY_ORBLOCK { fr->fr_flags |= FR_LOGORBLOCK; } 692 | level loglevel { unsetsyslog(); } 693 ; 694 695 returncode: 696 starticmpcode icmpcode ')' { fr->fr_icode = $2; yyresetdict(); } 697 ; 698 699 starticmpcode: 700 '(' { yysetdict(icmpcodewords); } 701 ; 702 703 srcdst: | IPFY_ALL 704 | fromto 705 ; 706 707 protocol: 708 YY_NUMBER { DOREM(fr->fr_proto = $1; \ 709 fr->fr_mproto = 0xff;) } 710 | YY_STR { if (!strcmp($1, "tcp-udp")) { 711 DOREM(fr->fr_flx |= FI_TCPUDP; \ 712 fr->fr_mflx |= FI_TCPUDP;) 713 } else { 714 int p = getproto($1); 715 if (p == -1) 716 yyerror("protocol unknown"); 717 DOREM(fr->fr_proto = p; \ 718 fr->fr_mproto = 0xff;) 719 } 720 free($1); 721 } 722 | YY_STR nextstring YY_STR 723 { if (!strcmp($1, "tcp") && 724 !strcmp($3, "udp")) { 725 DOREM(fr->fr_flx |= FI_TCPUDP; \ 726 fr->fr_mflx |= FI_TCPUDP;) 727 } else 728 YYERROR; 729 free($1); 730 free($3); 731 } 732 ; 733 734 nextstring: 735 '/' { yysetdict(NULL); } 736 ; 737 738 fromto: from srcobject to dstobject { yyexpectaddr = 0; yycont = NULL; } 739 | to dstobject { yyexpectaddr = 0; yycont = NULL; } 740 | from srcobject { yyexpectaddr = 0; yycont = NULL; } 741 ; 742 743 from: IPFY_FROM { setipftype(); 744 if (fr == NULL) 745 fr = frc; 746 yyexpectaddr = 1; 747 if (yydebug) 748 printf("set yyexpectaddr\n"); 749 yycont = &yyexpectaddr; 750 yysetdict(addrwords); 751 resetaddr(); } 752 ; 753 754 to: IPFY_TO { if (fr == NULL) 755 fr = frc; 756 yyexpectaddr = 1; 757 if (yydebug) 758 printf("set yyexpectaddr\n"); 759 yycont = &yyexpectaddr; 760 yysetdict(addrwords); 761 resetaddr(); } 762 ; 763 764 with: | andwith withlist 765 ; 766 767 andwith: 768 IPFY_WITH { nowith = 0; setipftype(); } 769 | IPFY_AND { nowith = 0; setipftype(); } 770 ; 771 772 flags: | startflags flagset 773 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 774 | startflags flagset '/' flagset 775 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 776 | startflags '/' flagset 777 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 778 | startflags YY_NUMBER 779 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = FR_TCPFMAX;) } 780 | startflags '/' YY_NUMBER 781 { DOALL(fr->fr_tcpf = 0; fr->fr_tcpfm = $3;) } 782 | startflags YY_NUMBER '/' YY_NUMBER 783 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 784 | startflags flagset '/' YY_NUMBER 785 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 786 | startflags YY_NUMBER '/' flagset 787 { DOALL(fr->fr_tcpf = $2; fr->fr_tcpfm = $4;) } 788 ; 789 790 startflags: 791 IPFY_FLAGS { if (frc->fr_type != FR_T_IPF) 792 yyerror("flags with non-ipf type rule"); 793 if (frc->fr_proto != IPPROTO_TCP) 794 yyerror("flags with non-TCP rule"); 795 } 796 ; 797 798 flagset: 799 YY_STR { $$ = tcpflags($1); free($1); } 800 | YY_HEX { $$ = $1; } 801 ; 802 803 srcobject: 804 { yyresetdict(); } fromport 805 | srcaddr srcport 806 | '!' srcaddr srcport 807 { DOALL(fr->fr_flags |= FR_NOTSRCIP;) } 808 ; 809 810 srcaddr: 811 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_src, sizeof($1.a)); \ 812 bcopy(&($1.m), &fr->fr_mip.fi_src, sizeof($1.m)); \ 813 if (dynamic != -1) { \ 814 fr->fr_satype = ifpflag; \ 815 fr->fr_ipf->fri_sifpidx = dynamic; \ 816 } else if (pooled || hashed) \ 817 fr->fr_satype = FRI_LOOKUP;) 818 } 819 | lstart srcaddrlist lend 820 ; 821 822 srcaddrlist: 823 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_src, sizeof($1.a)); \ 824 bcopy(&($1.m), &fr->fr_mip.fi_src, sizeof($1.m)); \ 825 if (dynamic != -1) { \ 826 fr->fr_satype = ifpflag; \ 827 fr->fr_ipf->fri_sifpidx = dynamic; \ 828 } else if (pooled || hashed) \ 829 fr->fr_satype = FRI_LOOKUP;) 830 } 831 | srcaddrlist lmore addr 832 { DOREM(bcopy(&($3.a), &fr->fr_ip.fi_src, sizeof($3.a)); \ 833 bcopy(&($3.m), &fr->fr_mip.fi_src, sizeof($3.m)); \ 834 if (dynamic != -1) { \ 835 fr->fr_satype = ifpflag; \ 836 fr->fr_ipf->fri_sifpidx = dynamic; \ 837 } else if (pooled || hashed) \ 838 fr->fr_satype = FRI_LOOKUP;) 839 } 840 ; 841 842 srcport: 843 | portcomp 844 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 845 | portrange 846 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 847 fr->fr_stop = $1.p2;) } 848 | porteq lstart srcportlist lend 849 { yyresetdict(); } 850 ; 851 852 fromport: 853 portcomp 854 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1;) } 855 | portrange 856 { DOALL(fr->fr_scmp = $1.pc; fr->fr_sport = $1.p1; \ 857 fr->fr_stop = $1.p2;) } 858 | porteq lstart srcportlist lend 859 { yyresetdict(); } 860 ; 861 862 srcportlist: 863 portnum { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $1;) } 864 | srcportlist lmore portnum 865 { DOREM(fr->fr_scmp = FR_EQUAL; fr->fr_sport = $3;) } 866 ; 867 868 dstobject: 869 { yyresetdict(); } toport 870 | dstaddr dstport 871 | '!' dstaddr dstport 872 { DOALL(fr->fr_flags |= FR_NOTDSTIP;) } 873 ; 874 875 dstaddr: 876 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_dst, sizeof($1.a)); \ 877 bcopy(&($1.m), &fr->fr_mip.fi_dst, sizeof($1.m)); \ 878 if (dynamic != -1) { \ 879 fr->fr_datype = ifpflag; \ 880 fr->fr_ipf->fri_difpidx = dynamic; \ 881 } else if (pooled || hashed) \ 882 fr->fr_datype = FRI_LOOKUP;) 883 } 884 | lstart dstaddrlist lend 885 ; 886 887 dstaddrlist: 888 addr { DOREM(bcopy(&($1.a), &fr->fr_ip.fi_dst, sizeof($1.a)); \ 889 bcopy(&($1.m), &fr->fr_mip.fi_dst, sizeof($1.m)); \ 890 if (dynamic != -1) { \ 891 fr->fr_datype = ifpflag; \ 892 fr->fr_ipf->fri_difpidx = dynamic; \ 893 } else if (pooled || hashed) \ 894 fr->fr_datype = FRI_LOOKUP;) 895 } 896 | dstaddrlist lmore addr 897 { DOREM(bcopy(&($3.a), &fr->fr_ip.fi_dst, sizeof($3.a)); \ 898 bcopy(&($3.m), &fr->fr_mip.fi_dst, sizeof($3.m)); \ 899 if (dynamic != -1) { \ 900 fr->fr_datype = ifpflag; \ 901 fr->fr_ipf->fri_difpidx = dynamic; \ 902 } else if (pooled || hashed) \ 903 fr->fr_datype = FRI_LOOKUP;) 904 } 905 ; 906 907 908 dstport: 909 | portcomp 910 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 911 | portrange 912 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 913 fr->fr_dtop = $1.p2;) } 914 | porteq lstart dstportlist lend 915 { yyresetdict(); } 916 ; 917 918 toport: 919 portcomp 920 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1;) } 921 | portrange 922 { DOALL(fr->fr_dcmp = $1.pc; fr->fr_dport = $1.p1; \ 923 fr->fr_dtop = $1.p2;) } 924 | porteq lstart dstportlist lend 925 { yyresetdict(); } 926 ; 927 928 dstportlist: 929 portnum { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $1;) } 930 | dstportlist lmore portnum 931 { DOREM(fr->fr_dcmp = FR_EQUAL; fr->fr_dport = $3;) } 932 ; 933 934 addr: pool '/' YY_NUMBER { pooled = 1; 935 yyexpectaddr = 0; 936 $$.a.iplookuptype = IPLT_POOL; 937 $$.a.iplookupnum = $3; } 938 | pool '=' '(' poollist ')' { pooled = 1; 939 yyexpectaddr = 0; 940 $$.a.iplookuptype = IPLT_POOL; 941 $$.a.iplookupnum = makepool($4); } 942 | hash '/' YY_NUMBER { hashed = 1; 943 yyexpectaddr = 0; 944 $$.a.iplookuptype = IPLT_HASH; 945 $$.a.iplookupnum = $3; } 946 | hash '=' '(' addrlist ')' { hashed = 1; 947 yyexpectaddr = 0; 948 $$.a.iplookuptype = IPLT_HASH; 949 $$.a.iplookupnum = makehash($4); } 950 | ipaddr { bcopy(&$1, &$$, sizeof($$)); 951 yyexpectaddr = 0; } 952 ; 953 954 ipaddr: IPFY_ANY { bzero(&($$), sizeof($$)); 955 yyresetdict(); 956 yyexpectaddr = 0; } 957 | hostname { if (use_inet6 == 0) { 958 $$.a.in4 = $1.in4; 959 $$.m.in4_addr = 0xffffffff; 960 } else { 961 set_ipv6_addr = 1; 962 bcopy(&$1, &$$.a, sizeof($$.a)); 963 fill6bits(128, (u_32_t *)&$$.m); 964 } 965 yyexpectaddr = 0; } 966 | hostname { yyresetdict(); 967 if (use_inet6 == 0) 968 $$.a.in4 = $1.in4; 969 else { 970 set_ipv6_addr = 1; 971 bcopy(&$1, &$$.a, sizeof($$.a)); 972 } 973 } 974 maskspace { yysetdict(maskwords); } 975 mask { if (use_inet6 == 0) { 976 $$.m.in4_addr = $5.in4.s_addr; 977 $$.a.in4_addr &= $5.in4.s_addr; 978 } else 979 bcopy(&$5, &$$.m, sizeof($$.m)); 980 yyresetdict(); 981 yyexpectaddr = 0; } 982 | YY_IPV6 { set_ipv6_addr = 1; 983 bcopy(&$1, &$$.a, sizeof($$.a)); 984 fill6bits(128, (u_32_t *)&$$.m); 985 yyresetdict(); 986 yyexpectaddr = 0; } 987 | YY_IPV6 { set_ipv6_addr = 1; 988 yyresetdict(); 989 bcopy(&$1, &$$.a, sizeof($$.a)); } 990 maskspace { yysetdict(maskwords); } 991 mask { bcopy(&$5, &$$.m, sizeof($$.m)); 992 yyresetdict(); 993 yyexpectaddr = 0; } 994 ; 995 996 maskspace: 997 '/' 998 | IPFY_MASK 999 ; 1000 1001 mask: 1002 ipv4 { $$.in4 = $1; } 1003 | YY_HEX { $$.in4.s_addr = htonl($1); } 1004 | YY_NUMBER { if ((use_inet6 == 0) && ($1 <= 32)) 1005 ntomask(4, $1, (u_32_t *)&$$.in4); 1006 else if ((use_inet6 != 0) && ($1 <= 128)) 1007 ntomask(6, $1, $$.i6); 1008 else { 1009 yyerror("Bad value specified for netmask"); 1010 return 0; 1011 } 1012 } 1013 | IPFY_BROADCAST { if (ifpflag == FRI_DYNAMIC) { 1014 bzero(&$$, sizeof($$)); 1015 ifpflag = FRI_BROADCAST; 1016 } else 1017 YYERROR; 1018 } 1019 | IPFY_NETWORK { if (ifpflag == FRI_DYNAMIC) { 1020 bzero(&$$, sizeof($$)); 1021 ifpflag = FRI_NETWORK; 1022 } else 1023 YYERROR; 1024 } 1025 | IPFY_NETMASKED { if (ifpflag == FRI_DYNAMIC) { 1026 bzero(&$$, sizeof($$)); 1027 ifpflag = FRI_NETMASKED; 1028 } else 1029 YYERROR; 1030 } 1031 | IPFY_PEER { if (ifpflag == FRI_DYNAMIC) { 1032 bzero(&$$, sizeof($$)); 1033 ifpflag = FRI_PEERADDR; 1034 } else 1035 YYERROR; 1036 } 1037 ; 1038 1039 hostname: 1040 ipv4 { $$.in4 = $1; } 1041 | YY_NUMBER { $$.in4.s_addr = $1; } 1042 | YY_HEX { $$.in4.s_addr = $1; } 1043 | YY_STR { if (lookuphost($1, &$$) == 1) 1044 free($1); 1045 else { 1046 free($1); 1047 if (ifpflag != FRI_DYNAMIC) 1048 yyerror("Unknown hostname"); 1049 } 1050 } 1051 ; 1052 1053 addrlist: 1054 ipaddr { $$ = newalist(NULL); 1055 if (set_ipv6_addr) 1056 $$->al_family = AF_INET6; 1057 else 1058 $$->al_family = AF_INET; 1059 set_ipv6_addr = 0; 1060 bcopy(&($1.a), &($$->al_i6addr), sizeof($1.a)); 1061 bcopy(&($1.m), &($$->al_i6mask), sizeof($1.m)); } 1062 | addrlist ',' ipaddr 1063 { $$ = newalist($1); 1064 if (set_ipv6_addr) 1065 $$->al_family = AF_INET6; 1066 else 1067 $$->al_family = AF_INET; 1068 set_ipv6_addr = 0; 1069 bcopy(&($3.a), &($$->al_i6addr), sizeof($3.a)); 1070 bcopy(&($3.m), &($$->al_i6mask), sizeof($3.m)); } 1071 ; 1072 1073 pool: IPFY_POOL { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1074 ; 1075 1076 hash: IPFY_HASH { yyexpectaddr = 0; yycont = NULL; yyresetdict(); } 1077 ; 1078 1079 poollist: 1080 ipaddr { $$ = newalist(NULL); 1081 if (set_ipv6_addr) 1082 $$->al_family = AF_INET6; 1083 else 1084 $$->al_family = AF_INET; 1085 set_ipv6_addr = 0; 1086 bcopy(&($1.a), &($$->al_i6addr), sizeof($1.a)); 1087 bcopy(&($1.m), &($$->al_i6mask), sizeof($1.m)); } 1088 | '!' ipaddr { $$ = newalist(NULL); 1089 $$->al_not = 1; 1090 if (set_ipv6_addr) 1091 $$->al_family = AF_INET6; 1092 else 1093 $$->al_family = AF_INET; 1094 set_ipv6_addr = 0; 1095 bcopy(&($2.a), &($$->al_i6addr), sizeof($2.a)); 1096 bcopy(&($2.m), &($$->al_i6mask), sizeof($2.m)); } 1097 | poollist ',' ipaddr 1098 { $$ = newalist($1); 1099 if (set_ipv6_addr) 1100 $$->al_family = AF_INET6; 1101 else 1102 $$->al_family = AF_INET; 1103 set_ipv6_addr = 0; 1104 bcopy(&($3.a), &($$->al_i6addr), sizeof($3.a)); 1105 bcopy(&($3.m), &($$->al_i6mask), sizeof($3.m)); } 1106 | poollist ',' '!' ipaddr 1107 { $$ = newalist($1); 1108 $$->al_not = 1; 1109 if (set_ipv6_addr) 1110 $$->al_family = AF_INET6; 1111 else 1112 $$->al_family = AF_INET; 1113 set_ipv6_addr = 0; 1114 bcopy(&($4.a), &($$->al_i6addr), sizeof($4.a)); 1115 bcopy(&($4.m), &($$->al_i6mask), sizeof($4.m)); } 1116 ; 1117 1118 port: IPFY_PORT { yyexpectaddr = 0; 1119 yycont = NULL; 1120 } 1121 ; 1122 1123 portc: port compare { $$ = $2; 1124 yysetdict(NULL); } 1125 | porteq { $$ = $1; } 1126 ; 1127 1128 porteq: port '=' { $$ = FR_EQUAL; 1129 yysetdict(NULL); } 1130 ; 1131 1132 portr: IPFY_PORT { yyexpectaddr = 0; 1133 yycont = NULL; 1134 yysetdict(NULL); } 1135 ; 1136 1137 portcomp: 1138 portc portnum { $$.pc = $1; 1139 $$.p1 = $2; 1140 yyresetdict(); } 1141 ; 1142 1143 portrange: 1144 portr portnum range portnum { $$.p1 = $2; 1145 $$.pc = $3; 1146 $$.p2 = $4; 1147 yyresetdict(); } 1148 ; 1149 1150 icmp: | itype icode 1151 ; 1152 1153 itype: seticmptype icmptype 1154 { DOALL(fr->fr_icmp = htons($2 << 8); fr->fr_icmpm = htons(0xff00);); 1155 yyresetdict(); 1156 } 1157 | seticmptype lstart typelist lend { yyresetdict(); } 1158 ; 1159 1160 seticmptype: 1161 IPFY_ICMPTYPE { setipftype(); 1162 yysetdict(icmptypewords); } 1163 ; 1164 1165 icode: | seticmpcode icmpcode 1166 { DOALL(fr->fr_icmp |= htons($2); fr->fr_icmpm |= htons(0xff);); 1167 yyresetdict(); 1168 } 1169 | seticmpcode lstart codelist lend { yyresetdict(); } 1170 ; 1171 1172 seticmpcode: 1173 IPFY_ICMPCODE { yysetdict(icmpcodewords); } 1174 ; 1175 1176 typelist: 1177 icmptype 1178 { DOREM(fr->fr_icmp = htons($1 << 8); fr->fr_icmpm = htons(0xff00);) } 1179 | typelist lmore icmptype 1180 { DOREM(fr->fr_icmp = htons($3 << 8); fr->fr_icmpm = htons(0xff00);) } 1181 ; 1182 1183 codelist: 1184 icmpcode 1185 { DOREM(fr->fr_icmp |= htons($1); fr->fr_icmpm |= htons(0xff);) } 1186 | codelist lmore icmpcode 1187 { DOREM(fr->fr_icmp |= htons($3); fr->fr_icmpm |= htons(0xff);) } 1188 ; 1189 1190 age: | IPFY_AGE YY_NUMBER { DOALL(fr->fr_age[0] = $2; \ 1191 fr->fr_age[1] = $2;) } 1192 | IPFY_AGE YY_NUMBER '/' YY_NUMBER 1193 { DOALL(fr->fr_age[0] = $2; \ 1194 fr->fr_age[1] = $4;) } 1195 ; 1196 1197 keep: | IPFY_KEEP keepstate 1198 | IPFY_KEEP keepfrag 1199 | IPFY_KEEP keepstate IPFY_KEEP keepfrag 1200 | IPFY_KEEP keepfrag IPFY_KEEP keepstate 1201 ; 1202 1203 keepstate: 1204 IPFY_STATE stateoptlist { DOALL(fr->fr_flags |= FR_KEEPSTATE;)} 1205 ; 1206 1207 keepfrag: 1208 IPFY_FRAGS fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1209 | IPFY_FRAG fragoptlist { DOALL(fr->fr_flags |= FR_KEEPFRAG;) } 1210 ; 1211 1212 fragoptlist: 1213 | '(' fragopts ')' 1214 ; 1215 1216 fragopts: 1217 fragopt lanother fragopts 1218 | fragopt 1219 ; 1220 1221 fragopt: 1222 IPFY_STRICT { DOALL(fr->fr_flags |= FR_FRSTRICT;) } 1223 ; 1224 1225 stateoptlist: 1226 | '(' stateopts ')' 1227 ; 1228 1229 stateopts: 1230 stateopt lanother stateopts 1231 | stateopt 1232 ; 1233 1234 stateopt: 1235 IPFY_LIMIT YY_NUMBER { DOALL(fr->fr_statemax = $2;) } 1236 | IPFY_STRICT { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1237 YYERROR; \ 1238 } else \ 1239 fr->fr_flags |= FR_STSTRICT;) 1240 } 1241 | IPFY_NEWISN { DOALL(if (fr->fr_proto != IPPROTO_TCP) { \ 1242 YYERROR; \ 1243 } else \ 1244 fr->fr_flags |= FR_NEWISN;) 1245 } 1246 | IPFY_NOICMPERR { DOALL(fr->fr_flags |= FR_NOICMPERR;) } 1247 1248 | IPFY_SYNC { DOALL(fr->fr_flags |= FR_STATESYNC;) } 1249 ; 1250 1251 portnum: 1252 servicename { if (getport(frc, $1, &($$)) == -1) 1253 yyerror("service unknown"); 1254 else 1255 $$ = ntohs($$); 1256 free($1); 1257 } 1258 | YY_NUMBER { if ($1 > 65535) /* Unsigned */ 1259 yyerror("invalid port number"); 1260 else 1261 $$ = $1; 1262 } 1263 ; 1264 1265 withlist: 1266 withopt 1267 | withlist withopt 1268 | withlist ',' withopt 1269 ; 1270 1271 withopt: 1272 opttype { DOALL(fr->fr_flx |= $1; fr->fr_mflx |= $1;) } 1273 | notwith opttype 1274 { DOALL(fr->fr_mflx |= $2;) } 1275 | ipopt ipopts { yyresetdict(); } 1276 | notwith ipopt ipopts { yyresetdict(); } 1277 | startv6hdrs ipv6hdrs { yyresetdict(); } 1278 ; 1279 1280 ipopt: IPFY_OPT { yysetdict(ipv4optwords); } 1281 ; 1282 1283 startv6hdrs: 1284 IPF6_V6HDRS { if (use_inet6 == 0) 1285 yyerror("only available with IPv6"); 1286 yysetdict(ipv6optwords); 1287 } 1288 ; 1289 1290 notwith: 1291 IPFY_NOT { nowith = 1; } 1292 | IPFY_NO { nowith = 1; } 1293 ; 1294 1295 opttype: 1296 IPFY_IPOPTS { $$ = FI_OPTIONS; } 1297 | IPFY_SHORT { $$ = FI_SHORT; } 1298 | IPFY_NAT { $$ = FI_NATED; } 1299 | IPFY_BAD { $$ = FI_BAD; } 1300 | IPFY_BADNAT { $$ = FI_BADNAT; } 1301 | IPFY_BADSRC { $$ = FI_BADSRC; } 1302 | IPFY_LOWTTL { $$ = FI_LOWTTL; } 1303 | IPFY_FRAG { $$ = FI_FRAG; } 1304 | IPFY_FRAGBODY { $$ = FI_FRAGBODY; } 1305 | IPFY_FRAGS { $$ = FI_FRAG; } 1306 | IPFY_MBCAST { $$ = FI_MBCAST; } 1307 | IPFY_MULTICAST { $$ = FI_MULTICAST; } 1308 | IPFY_BROADCAST { $$ = FI_BROADCAST; } 1309 | IPFY_STATE { $$ = FI_STATE; } 1310 | IPFY_OOW { $$ = FI_OOW; } 1311 ; 1312 1313 ipopts: optlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1314 if (!nowith) 1315 fr->fr_ip.fi_optmsk |= $1;) 1316 } 1317 ; 1318 1319 optlist: 1320 opt { $$ |= $1; } 1321 | optlist ',' opt { $$ |= $1 | $3; } 1322 ; 1323 1324 ipv6hdrs: 1325 ipv6hdrlist { DOALL(fr->fr_mip.fi_optmsk |= $1; 1326 if (!nowith) 1327 fr->fr_ip.fi_optmsk |= $1;) 1328 } 1329 ; 1330 1331 ipv6hdrlist: 1332 ipv6hdr { $$ |= $1; } 1333 | ipv6hdrlist ',' ipv6hdr { $$ |= $1 | $3; } 1334 ; 1335 1336 secname: 1337 seclevel { $$ |= $1; } 1338 | secname ',' seclevel { $$ |= $1 | $3; } 1339 ; 1340 1341 seclevel: 1342 IPFY_SEC_UNC { $$ = secbit(IPSO_CLASS_UNCL); } 1343 | IPFY_SEC_CONF { $$ = secbit(IPSO_CLASS_CONF); } 1344 | IPFY_SEC_RSV1 { $$ = secbit(IPSO_CLASS_RES1); } 1345 | IPFY_SEC_RSV2 { $$ = secbit(IPSO_CLASS_RES2); } 1346 | IPFY_SEC_RSV3 { $$ = secbit(IPSO_CLASS_RES3); } 1347 | IPFY_SEC_RSV4 { $$ = secbit(IPSO_CLASS_RES4); } 1348 | IPFY_SEC_SEC { $$ = secbit(IPSO_CLASS_SECR); } 1349 | IPFY_SEC_TS { $$ = secbit(IPSO_CLASS_TOPS); } 1350 ; 1351 1352 icmptype: 1353 YY_NUMBER { $$ = $1; } 1354 | IPFY_ICMPT_UNR { $$ = ICMP_UNREACH; } 1355 | IPFY_ICMPT_ECHO { $$ = ICMP_ECHO; } 1356 | IPFY_ICMPT_ECHOR { $$ = ICMP_ECHOREPLY; } 1357 | IPFY_ICMPT_SQUENCH { $$ = ICMP_SOURCEQUENCH; } 1358 | IPFY_ICMPT_REDIR { $$ = ICMP_REDIRECT; } 1359 | IPFY_ICMPT_TIMEX { $$ = ICMP_TIMXCEED; } 1360 | IPFY_ICMPT_PARAMP { $$ = ICMP_PARAMPROB; } 1361 | IPFY_ICMPT_TIMEST { $$ = ICMP_TSTAMP; } 1362 | IPFY_ICMPT_TIMESTREP { $$ = ICMP_TSTAMPREPLY; } 1363 | IPFY_ICMPT_INFOREQ { $$ = ICMP_IREQ; } 1364 | IPFY_ICMPT_INFOREP { $$ = ICMP_IREQREPLY; } 1365 | IPFY_ICMPT_MASKREQ { $$ = ICMP_MASKREQ; } 1366 | IPFY_ICMPT_MASKREP { $$ = ICMP_MASKREPLY; } 1367 | IPFY_ICMPT_ROUTERAD { $$ = ICMP_ROUTERADVERT; } 1368 | IPFY_ICMPT_ROUTERSOL { $$ = ICMP_ROUTERSOLICIT; } 1369 ; 1370 1371 icmpcode: 1372 YY_NUMBER { $$ = $1; } 1373 | IPFY_ICMPC_NETUNR { $$ = ICMP_UNREACH_NET; } 1374 | IPFY_ICMPC_HSTUNR { $$ = ICMP_UNREACH_HOST; } 1375 | IPFY_ICMPC_PROUNR { $$ = ICMP_UNREACH_PROTOCOL; } 1376 | IPFY_ICMPC_PORUNR { $$ = ICMP_UNREACH_PORT; } 1377 | IPFY_ICMPC_NEEDF { $$ = ICMP_UNREACH_NEEDFRAG; } 1378 | IPFY_ICMPC_SRCFAIL { $$ = ICMP_UNREACH_SRCFAIL; } 1379 | IPFY_ICMPC_NETUNK { $$ = ICMP_UNREACH_NET_UNKNOWN; } 1380 | IPFY_ICMPC_HSTUNK { $$ = ICMP_UNREACH_HOST_UNKNOWN; } 1381 | IPFY_ICMPC_ISOLATE { $$ = ICMP_UNREACH_ISOLATED; } 1382 | IPFY_ICMPC_NETPRO { $$ = ICMP_UNREACH_NET_PROHIB; } 1383 | IPFY_ICMPC_HSTPRO { $$ = ICMP_UNREACH_HOST_PROHIB; } 1384 | IPFY_ICMPC_NETTOS { $$ = ICMP_UNREACH_TOSNET; } 1385 | IPFY_ICMPC_HSTTOS { $$ = ICMP_UNREACH_TOSHOST; } 1386 | IPFY_ICMPC_FLTPRO { $$ = ICMP_UNREACH_ADMIN_PROHIBIT; } 1387 | IPFY_ICMPC_HSTPRE { $$ = 14; } 1388 | IPFY_ICMPC_CUTPRE { $$ = 15; } 1389 ; 1390 1391 opt: 1392 IPFY_IPOPT_NOP { $$ = getoptbyvalue(IPOPT_NOP); } 1393 | IPFY_IPOPT_RR { $$ = getoptbyvalue(IPOPT_RR); } 1394 | IPFY_IPOPT_ZSU { $$ = getoptbyvalue(IPOPT_ZSU); } 1395 | IPFY_IPOPT_MTUP { $$ = getoptbyvalue(IPOPT_MTUP); } 1396 | IPFY_IPOPT_MTUR { $$ = getoptbyvalue(IPOPT_MTUR); } 1397 | IPFY_IPOPT_ENCODE { $$ = getoptbyvalue(IPOPT_ENCODE); } 1398 | IPFY_IPOPT_TS { $$ = getoptbyvalue(IPOPT_TS); } 1399 | IPFY_IPOPT_TR { $$ = getoptbyvalue(IPOPT_TR); } 1400 | IPFY_IPOPT_SEC { $$ = getoptbyvalue(IPOPT_SECURITY); } 1401 | IPFY_IPOPT_LSRR { $$ = getoptbyvalue(IPOPT_LSRR); } 1402 | IPFY_IPOPT_ESEC { $$ = getoptbyvalue(IPOPT_E_SEC); } 1403 | IPFY_IPOPT_CIPSO { $$ = getoptbyvalue(IPOPT_CIPSO); } 1404 | IPFY_IPOPT_SATID { $$ = getoptbyvalue(IPOPT_SATID); } 1405 | IPFY_IPOPT_SSRR { $$ = getoptbyvalue(IPOPT_SSRR); } 1406 | IPFY_IPOPT_ADDEXT { $$ = getoptbyvalue(IPOPT_ADDEXT); } 1407 | IPFY_IPOPT_VISA { $$ = getoptbyvalue(IPOPT_VISA); } 1408 | IPFY_IPOPT_IMITD { $$ = getoptbyvalue(IPOPT_IMITD); } 1409 | IPFY_IPOPT_EIP { $$ = getoptbyvalue(IPOPT_EIP); } 1410 | IPFY_IPOPT_FINN { $$ = getoptbyvalue(IPOPT_FINN); } 1411 | IPFY_IPOPT_DPS { $$ = getoptbyvalue(IPOPT_DPS); } 1412 | IPFY_IPOPT_SDB { $$ = getoptbyvalue(IPOPT_SDB); } 1413 | IPFY_IPOPT_NSAPA { $$ = getoptbyvalue(IPOPT_NSAPA); } 1414 | IPFY_IPOPT_RTRALRT { $$ = getoptbyvalue(IPOPT_RTRALRT); } 1415 | IPFY_IPOPT_UMP { $$ = getoptbyvalue(IPOPT_UMP); } 1416 | setsecclass secname 1417 { DOALL(fr->fr_mip.fi_secmsk |= $2; 1418 if (!nowith) 1419 fr->fr_ip.fi_secmsk |= $2;) 1420 $$ = 0; 1421 yyresetdict(); 1422 } 1423 ; 1424 1425 setsecclass: 1426 IPFY_SECCLASS { yysetdict(ipv4secwords); } 1427 ; 1428 1429 ipv6hdr: 1430 IPFY_AH { $$ = getv6optbyvalue(IPPROTO_AH); } 1431 | IPFY_IPV6OPT_DSTOPTS { $$ = getv6optbyvalue(IPPROTO_DSTOPTS); } 1432 | IPFY_ESP { $$ = getv6optbyvalue(IPPROTO_ESP); } 1433 | IPFY_IPV6OPT_HOPOPTS { $$ = getv6optbyvalue(IPPROTO_HOPOPTS); } 1434 | IPFY_IPV6OPT_IPV6 { $$ = getv6optbyvalue(IPPROTO_IPV6); } 1435 | IPFY_IPV6OPT_NONE { $$ = getv6optbyvalue(IPPROTO_NONE); } 1436 | IPFY_IPV6OPT_ROUTING { $$ = getv6optbyvalue(IPPROTO_ROUTING); } 1437 | IPFY_FRAG { $$ = getv6optbyvalue(IPPROTO_FRAGMENT); } 1438 ; 1439 1440 level: IPFY_LEVEL { setsyslog(); } 1441 ; 1442 1443 loglevel: 1444 priority { fr->fr_loglevel = LOG_LOCAL0|$1; } 1445 | facility '.' priority { fr->fr_loglevel = $1 | $3; } 1446 ; 1447 1448 facility: 1449 IPFY_FAC_KERN { $$ = LOG_KERN; } 1450 | IPFY_FAC_USER { $$ = LOG_USER; } 1451 | IPFY_FAC_MAIL { $$ = LOG_MAIL; } 1452 | IPFY_FAC_DAEMON { $$ = LOG_DAEMON; } 1453 | IPFY_FAC_AUTH { $$ = LOG_AUTH; } 1454 | IPFY_FAC_SYSLOG { $$ = LOG_SYSLOG; } 1455 | IPFY_FAC_LPR { $$ = LOG_LPR; } 1456 | IPFY_FAC_NEWS { $$ = LOG_NEWS; } 1457 | IPFY_FAC_UUCP { $$ = LOG_UUCP; } 1458 | IPFY_FAC_CRON { $$ = LOG_CRON; } 1459 | IPFY_FAC_FTP { $$ = LOG_FTP; } 1460 | IPFY_FAC_AUTHPRIV { $$ = LOG_AUTHPRIV; } 1461 | IPFY_FAC_AUDIT { $$ = LOG_AUDIT; } 1462 | IPFY_FAC_LFMT { $$ = LOG_LFMT; } 1463 | IPFY_FAC_LOCAL0 { $$ = LOG_LOCAL0; } 1464 | IPFY_FAC_LOCAL1 { $$ = LOG_LOCAL1; } 1465 | IPFY_FAC_LOCAL2 { $$ = LOG_LOCAL2; } 1466 | IPFY_FAC_LOCAL3 { $$ = LOG_LOCAL3; } 1467 | IPFY_FAC_LOCAL4 { $$ = LOG_LOCAL4; } 1468 | IPFY_FAC_LOCAL5 { $$ = LOG_LOCAL5; } 1469 | IPFY_FAC_LOCAL6 { $$ = LOG_LOCAL6; } 1470 | IPFY_FAC_LOCAL7 { $$ = LOG_LOCAL7; } 1471 | IPFY_FAC_SECURITY { $$ = LOG_SECURITY; } 1472 ; 1473 1474 priority: 1475 IPFY_PRI_EMERG { $$ = LOG_EMERG; } 1476 | IPFY_PRI_ALERT { $$ = LOG_ALERT; } 1477 | IPFY_PRI_CRIT { $$ = LOG_CRIT; } 1478 | IPFY_PRI_ERR { $$ = LOG_ERR; } 1479 | IPFY_PRI_WARN { $$ = LOG_WARNING; } 1480 | IPFY_PRI_NOTICE { $$ = LOG_NOTICE; } 1481 | IPFY_PRI_INFO { $$ = LOG_INFO; } 1482 | IPFY_PRI_DEBUG { $$ = LOG_DEBUG; } 1483 ; 1484 1485 compare: 1486 YY_CMP_EQ { $$ = FR_EQUAL; } 1487 | YY_CMP_NE { $$ = FR_NEQUAL; } 1488 | YY_CMP_LT { $$ = FR_LESST; } 1489 | YY_CMP_LE { $$ = FR_LESSTE; } 1490 | YY_CMP_GT { $$ = FR_GREATERT; } 1491 | YY_CMP_GE { $$ = FR_GREATERTE; } 1492 ; 1493 1494 range: YY_RANGE_IN { $$ = FR_INRANGE; } 1495 | YY_RANGE_OUT { $$ = FR_OUTRANGE; } 1496 | ':' { $$ = FR_INCRANGE; } 1497 ; 1498 1499 servicename: 1500 YY_STR { $$ = $1; } 1501 ; 1502 1503 interfacename: YY_STR { $$ = $1; } 1504 | YY_STR ':' YY_NUMBER 1505 { $$ = $1; 1506 fprintf(stderr, "%d: Logical interface %s:%d unsupported, " 1507 "use the physical interface %s instead.\n", 1508 yylineNum, $1, $3, $1); 1509 } 1510 ; 1511 1512 name: YY_STR { $$ = $1; } 1513 ; 1514 1515 ipv4_16: 1516 YY_NUMBER '.' YY_NUMBER 1517 { if ($1 > 255 || $3 > 255) { 1518 yyerror("Invalid octet string for IP address"); 1519 return 0; 1520 } 1521 $$.s_addr = ($1 << 24) | ($3 << 16); 1522 $$.s_addr = htonl($$.s_addr); 1523 } 1524 ; 1525 1526 ipv4_24: 1527 ipv4_16 '.' YY_NUMBER 1528 { if ($3 > 255) { 1529 yyerror("Invalid octet string for IP address"); 1530 return 0; 1531 } 1532 $$.s_addr |= htonl($3 << 8); 1533 } 1534 ; 1535 1536 ipv4: ipv4_24 '.' YY_NUMBER 1537 { if ($3 > 255) { 1538 yyerror("Invalid octet string for IP address"); 1539 return 0; 1540 } 1541 $$.s_addr |= htonl($3); 1542 } 1543 | ipv4_24 1544 | ipv4_16 1545 ; 1546 1547 %% 1548 1549 1550 static struct wordtab ipfwords[95] = { 1551 { "age", IPFY_AGE }, 1552 { "ah", IPFY_AH }, 1553 { "all", IPFY_ALL }, 1554 { "and", IPFY_AND }, 1555 { "auth", IPFY_AUTH }, 1556 { "bad", IPFY_BAD }, 1557 { "bad-nat", IPFY_BADNAT }, 1558 { "bad-src", IPFY_BADSRC }, 1559 { "bcast", IPFY_BROADCAST }, 1560 { "block", IPFY_BLOCK }, 1561 { "body", IPFY_BODY }, 1562 { "bpf-v4", IPFY_BPFV4 }, 1563 #ifdef USE_INET6 1564 { "bpf-v6", IPFY_BPFV6 }, 1565 #endif 1566 { "call", IPFY_CALL }, 1567 { "code", IPFY_ICMPCODE }, 1568 { "count", IPFY_COUNT }, 1569 { "dup-to", IPFY_DUPTO }, 1570 { "eq", YY_CMP_EQ }, 1571 { "esp", IPFY_ESP }, 1572 { "fastroute", IPFY_FROUTE }, 1573 { "first", IPFY_FIRST }, 1574 { "flags", IPFY_FLAGS }, 1575 { "frag", IPFY_FRAG }, 1576 { "frag-body", IPFY_FRAGBODY }, 1577 { "frags", IPFY_FRAGS }, 1578 { "from", IPFY_FROM }, 1579 { "ge", YY_CMP_GE }, 1580 { "group", IPFY_GROUP }, 1581 { "gt", YY_CMP_GT }, 1582 { "head", IPFY_HEAD }, 1583 { "icmp", IPFY_ICMP }, 1584 { "icmp-type", IPFY_ICMPTYPE }, 1585 { "in", IPFY_IN }, 1586 { "in-via", IPFY_INVIA }, 1587 { "intercept_loopback", IPFY_SET_LOOPBACK }, 1588 { "ipopt", IPFY_IPOPTS }, 1589 { "ipopts", IPFY_IPOPTS }, 1590 { "keep", IPFY_KEEP }, 1591 { "le", YY_CMP_LE }, 1592 { "level", IPFY_LEVEL }, 1593 { "limit", IPFY_LIMIT }, 1594 { "log", IPFY_LOG }, 1595 { "lowttl", IPFY_LOWTTL }, 1596 { "lt", YY_CMP_LT }, 1597 { "mask", IPFY_MASK }, 1598 { "match-tag", IPFY_MATCHTAG }, 1599 { "mbcast", IPFY_MBCAST }, 1600 { "multicast", IPFY_MULTICAST }, 1601 { "nat", IPFY_NAT }, 1602 { "ne", YY_CMP_NE }, 1603 { "net", IPFY_NETWORK }, 1604 { "newisn", IPFY_NEWISN }, 1605 { "no", IPFY_NO }, 1606 { "no-icmp-err", IPFY_NOICMPERR }, 1607 { "now", IPFY_NOW }, 1608 { "not", IPFY_NOT }, 1609 { "oow", IPFY_OOW }, 1610 { "on", IPFY_ON }, 1611 { "opt", IPFY_OPT }, 1612 { "or-block", IPFY_ORBLOCK }, 1613 { "out", IPFY_OUT }, 1614 { "out-via", IPFY_OUTVIA }, 1615 { "pass", IPFY_PASS }, 1616 { "port", IPFY_PORT }, 1617 { "pps", IPFY_PPS }, 1618 { "preauth", IPFY_PREAUTH }, 1619 { "proto", IPFY_PROTO }, 1620 { "quick", IPFY_QUICK }, 1621 { "reply-to", IPFY_REPLY_TO }, 1622 { "return-icmp", IPFY_RETICMP }, 1623 { "return-icmp-as-dest", IPFY_RETICMPASDST }, 1624 { "return-rst", IPFY_RETRST }, 1625 { "route-to", IPFY_ROUTETO }, 1626 { "sec-class", IPFY_SECCLASS }, 1627 { "set-tag", IPFY_SETTAG }, 1628 { "set", IPFY_SET }, 1629 { "skip", IPFY_SKIP }, 1630 { "short", IPFY_SHORT }, 1631 { "state", IPFY_STATE }, 1632 { "state-age", IPFY_AGE }, 1633 { "strict", IPFY_STRICT }, 1634 { "sync", IPFY_SYNC }, 1635 { "tcp", IPFY_TCP }, 1636 { "tcp-udp", IPFY_TCPUDP }, 1637 { "tos", IPFY_TOS }, 1638 { "to", IPFY_TO }, 1639 { "ttl", IPFY_TTL }, 1640 { "udp", IPFY_UDP }, 1641 { "v6hdrs", IPF6_V6HDRS }, 1642 { "with", IPFY_WITH }, 1643 { NULL, 0 } 1644 }; 1645 1646 static struct wordtab addrwords[4] = { 1647 { "any", IPFY_ANY }, 1648 { "hash", IPFY_HASH }, 1649 { "pool", IPFY_POOL }, 1650 { NULL, 0 } 1651 }; 1652 1653 static struct wordtab maskwords[5] = { 1654 { "broadcast", IPFY_BROADCAST }, 1655 { "netmasked", IPFY_NETMASKED }, 1656 { "network", IPFY_NETWORK }, 1657 { "peer", IPFY_PEER }, 1658 { NULL, 0 } 1659 }; 1660 1661 static struct wordtab icmptypewords[16] = { 1662 { "echo", IPFY_ICMPT_ECHO }, 1663 { "echorep", IPFY_ICMPT_ECHOR }, 1664 { "inforeq", IPFY_ICMPT_INFOREQ }, 1665 { "inforep", IPFY_ICMPT_INFOREP }, 1666 { "maskrep", IPFY_ICMPT_MASKREP }, 1667 { "maskreq", IPFY_ICMPT_MASKREQ }, 1668 { "paramprob", IPFY_ICMPT_PARAMP }, 1669 { "redir", IPFY_ICMPT_REDIR }, 1670 { "unreach", IPFY_ICMPT_UNR }, 1671 { "routerad", IPFY_ICMPT_ROUTERAD }, 1672 { "routersol", IPFY_ICMPT_ROUTERSOL }, 1673 { "squench", IPFY_ICMPT_SQUENCH }, 1674 { "timest", IPFY_ICMPT_TIMEST }, 1675 { "timestrep", IPFY_ICMPT_TIMESTREP }, 1676 { "timex", IPFY_ICMPT_TIMEX }, 1677 { NULL, 0 }, 1678 }; 1679 1680 static struct wordtab icmpcodewords[17] = { 1681 { "cutoff-preced", IPFY_ICMPC_CUTPRE }, 1682 { "filter-prohib", IPFY_ICMPC_FLTPRO }, 1683 { "isolate", IPFY_ICMPC_ISOLATE }, 1684 { "needfrag", IPFY_ICMPC_NEEDF }, 1685 { "net-prohib", IPFY_ICMPC_NETPRO }, 1686 { "net-tos", IPFY_ICMPC_NETTOS }, 1687 { "host-preced", IPFY_ICMPC_HSTPRE }, 1688 { "host-prohib", IPFY_ICMPC_HSTPRO }, 1689 { "host-tos", IPFY_ICMPC_HSTTOS }, 1690 { "host-unk", IPFY_ICMPC_HSTUNK }, 1691 { "host-unr", IPFY_ICMPC_HSTUNR }, 1692 { "net-unk", IPFY_ICMPC_NETUNK }, 1693 { "net-unr", IPFY_ICMPC_NETUNR }, 1694 { "port-unr", IPFY_ICMPC_PORUNR }, 1695 { "proto-unr", IPFY_ICMPC_PROUNR }, 1696 { "srcfail", IPFY_ICMPC_SRCFAIL }, 1697 { NULL, 0 }, 1698 }; 1699 1700 static struct wordtab ipv4optwords[25] = { 1701 { "addext", IPFY_IPOPT_ADDEXT }, 1702 { "cipso", IPFY_IPOPT_CIPSO }, 1703 { "dps", IPFY_IPOPT_DPS }, 1704 { "e-sec", IPFY_IPOPT_ESEC }, 1705 { "eip", IPFY_IPOPT_EIP }, 1706 { "encode", IPFY_IPOPT_ENCODE }, 1707 { "finn", IPFY_IPOPT_FINN }, 1708 { "imitd", IPFY_IPOPT_IMITD }, 1709 { "lsrr", IPFY_IPOPT_LSRR }, 1710 { "mtup", IPFY_IPOPT_MTUP }, 1711 { "mtur", IPFY_IPOPT_MTUR }, 1712 { "nop", IPFY_IPOPT_NOP }, 1713 { "nsapa", IPFY_IPOPT_NSAPA }, 1714 { "rr", IPFY_IPOPT_RR }, 1715 { "rtralrt", IPFY_IPOPT_RTRALRT }, 1716 { "satid", IPFY_IPOPT_SATID }, 1717 { "sdb", IPFY_IPOPT_SDB }, 1718 { "sec", IPFY_IPOPT_SEC }, 1719 { "ssrr", IPFY_IPOPT_SSRR }, 1720 { "tr", IPFY_IPOPT_TR }, 1721 { "ts", IPFY_IPOPT_TS }, 1722 { "ump", IPFY_IPOPT_UMP }, 1723 { "visa", IPFY_IPOPT_VISA }, 1724 { "zsu", IPFY_IPOPT_ZSU }, 1725 { NULL, 0 }, 1726 }; 1727 1728 static struct wordtab ipv4secwords[9] = { 1729 { "confid", IPFY_SEC_CONF }, 1730 { "reserv-1", IPFY_SEC_RSV1 }, 1731 { "reserv-2", IPFY_SEC_RSV2 }, 1732 { "reserv-3", IPFY_SEC_RSV3 }, 1733 { "reserv-4", IPFY_SEC_RSV4 }, 1734 { "secret", IPFY_SEC_SEC }, 1735 { "topsecret", IPFY_SEC_TS }, 1736 { "unclass", IPFY_SEC_UNC }, 1737 { NULL, 0 }, 1738 }; 1739 1740 static struct wordtab ipv6optwords[8] = { 1741 { "dstopts", IPFY_IPV6OPT_DSTOPTS }, 1742 { "esp", IPFY_ESP }, 1743 { "frag", IPFY_FRAG }, 1744 { "hopopts", IPFY_IPV6OPT_HOPOPTS }, 1745 { "ipv6", IPFY_IPV6OPT_IPV6 }, 1746 { "none", IPFY_IPV6OPT_NONE }, 1747 { "routing", IPFY_IPV6OPT_ROUTING }, 1748 { NULL, 0 }, 1749 }; 1750 1751 static struct wordtab logwords[33] = { 1752 { "kern", IPFY_FAC_KERN }, 1753 { "user", IPFY_FAC_USER }, 1754 { "mail", IPFY_FAC_MAIL }, 1755 { "daemon", IPFY_FAC_DAEMON }, 1756 { "auth", IPFY_FAC_AUTH }, 1757 { "syslog", IPFY_FAC_SYSLOG }, 1758 { "lpr", IPFY_FAC_LPR }, 1759 { "news", IPFY_FAC_NEWS }, 1760 { "uucp", IPFY_FAC_UUCP }, 1761 { "cron", IPFY_FAC_CRON }, 1762 { "ftp", IPFY_FAC_FTP }, 1763 { "authpriv", IPFY_FAC_AUTHPRIV }, 1764 { "audit", IPFY_FAC_AUDIT }, 1765 { "logalert", IPFY_FAC_LFMT }, 1766 { "console", IPFY_FAC_CONSOLE }, 1767 { "security", IPFY_FAC_SECURITY }, 1768 { "local0", IPFY_FAC_LOCAL0 }, 1769 { "local1", IPFY_FAC_LOCAL1 }, 1770 { "local2", IPFY_FAC_LOCAL2 }, 1771 { "local3", IPFY_FAC_LOCAL3 }, 1772 { "local4", IPFY_FAC_LOCAL4 }, 1773 { "local5", IPFY_FAC_LOCAL5 }, 1774 { "local6", IPFY_FAC_LOCAL6 }, 1775 { "local7", IPFY_FAC_LOCAL7 }, 1776 { "emerg", IPFY_PRI_EMERG }, 1777 { "alert", IPFY_PRI_ALERT }, 1778 { "crit", IPFY_PRI_CRIT }, 1779 { "err", IPFY_PRI_ERR }, 1780 { "warn", IPFY_PRI_WARN }, 1781 { "notice", IPFY_PRI_NOTICE }, 1782 { "info", IPFY_PRI_INFO }, 1783 { "debug", IPFY_PRI_DEBUG }, 1784 { NULL, 0 }, 1785 }; 1786 1787 1788 1789 1790 int ipf_parsefile(fd, addfunc, iocfuncs, filename) 1791 int fd; 1792 addfunc_t addfunc; 1793 ioctlfunc_t *iocfuncs; 1794 char *filename; 1795 { 1796 FILE *fp = NULL; 1797 char *s; 1798 1799 yylineNum = 1; 1800 yysettab(ipfwords); 1801 1802 s = getenv("YYDEBUG"); 1803 if (s != NULL) 1804 yydebug = atoi(s); 1805 else 1806 yydebug = 0; 1807 1808 if (strcmp(filename, "-")) { 1809 fp = fopen(filename, "r"); 1810 if (fp == NULL) { 1811 fprintf(stderr, "fopen(%s) failed: %s\n", filename, 1812 STRERROR(errno)); 1813 return -1; 1814 } 1815 } else 1816 fp = stdin; 1817 1818 while (ipf_parsesome(fd, addfunc, iocfuncs, fp) == 1) 1819 ; 1820 if (fp != NULL) 1821 fclose(fp); 1822 return 0; 1823 } 1824 1825 1826 int ipf_parsesome(fd, addfunc, iocfuncs, fp) 1827 int fd; 1828 addfunc_t addfunc; 1829 ioctlfunc_t *iocfuncs; 1830 FILE *fp; 1831 { 1832 char *s; 1833 int i; 1834 1835 ipffd = fd; 1836 for (i = 0; i <= IPL_LOGMAX; i++) 1837 ipfioctl[i] = iocfuncs[i]; 1838 ipfaddfunc = addfunc; 1839 1840 if (feof(fp)) 1841 return 0; 1842 i = fgetc(fp); 1843 if (i == EOF) 1844 return 0; 1845 if (ungetc(i, fp) == 0) 1846 return 0; 1847 if (feof(fp)) 1848 return 0; 1849 s = getenv("YYDEBUG"); 1850 if (s != NULL) 1851 yydebug = atoi(s); 1852 else 1853 yydebug = 0; 1854 1855 yyin = fp; 1856 yyparse(); 1857 return 1; 1858 } 1859 1860 1861 static void newrule() 1862 { 1863 frentry_t *frn; 1864 1865 frn = (frentry_t *)calloc(1, sizeof(frentry_t)); 1866 if (frn == NULL) 1867 yyerror("sorry, out of memory"); 1868 for (fr = frtop; fr != NULL && fr->fr_next != NULL; fr = fr->fr_next) 1869 ; 1870 if (fr != NULL) 1871 fr->fr_next = frn; 1872 if (frtop == NULL) 1873 frtop = frn; 1874 fr = frn; 1875 frc = frn; 1876 fr->fr_loglevel = 0xffff; 1877 fr->fr_isc = (void *)-1; 1878 fr->fr_logtag = FR_NOLOGTAG; 1879 fr->fr_type = FR_T_NONE; 1880 if (use_inet6 != 0) 1881 fr->fr_v = 6; 1882 else 1883 fr->fr_v = 4; 1884 1885 nrules = 1; 1886 } 1887 1888 1889 static void setipftype() 1890 { 1891 for (fr = frc; fr != NULL; fr = fr->fr_next) { 1892 if (fr->fr_type == FR_T_NONE) { 1893 fr->fr_type = FR_T_IPF; 1894 fr->fr_data = (void *)calloc(sizeof(fripf_t), 1); 1895 if (fr->fr_data == NULL) 1896 yyerror("sorry, out of memory"); 1897 fr->fr_dsize = sizeof(fripf_t); 1898 fr->fr_ip.fi_v = frc->fr_v; 1899 fr->fr_mip.fi_v = 0xf; 1900 fr->fr_ipf->fri_sifpidx = -1; 1901 fr->fr_ipf->fri_difpidx = -1; 1902 } 1903 if (fr->fr_type != FR_T_IPF) { 1904 fprintf(stderr, "IPF Type not set\n"); 1905 } 1906 } 1907 } 1908 1909 1910 static frentry_t *addrule() 1911 { 1912 frentry_t *f, *f1, *f2; 1913 int count; 1914 1915 for (f2 = frc; f2->fr_next != NULL; f2 = f2->fr_next) 1916 ; 1917 1918 count = nrules; 1919 if (count == 0) { 1920 f = (frentry_t *)calloc(sizeof(*f), 1); 1921 if (f == NULL) 1922 yyerror("sorry, out of memory"); 1923 added++; 1924 f2->fr_next = f; 1925 bcopy(f2, f, sizeof(*f)); 1926 if (f2->fr_caddr != NULL) { 1927 f->fr_caddr = malloc(f->fr_dsize); 1928 if (f->fr_caddr == NULL) 1929 yyerror("sorry, out of memory"); 1930 bcopy(f2->fr_caddr, f->fr_caddr, f->fr_dsize); 1931 } 1932 f->fr_next = NULL; 1933 return f; 1934 } 1935 f = f2; 1936 for (f1 = frc; count > 0; count--, f1 = f1->fr_next) { 1937 f->fr_next = (frentry_t *)calloc(sizeof(*f), 1); 1938 if (f->fr_next == NULL) 1939 yyerror("sorry, out of memory"); 1940 added++; 1941 f = f->fr_next; 1942 bcopy(f1, f, sizeof(*f)); 1943 f->fr_next = NULL; 1944 if (f->fr_caddr != NULL) { 1945 f->fr_caddr = malloc(f->fr_dsize); 1946 if (f->fr_caddr == NULL) 1947 yyerror("sorry, out of memory"); 1948 bcopy(f1->fr_caddr, f->fr_caddr, f->fr_dsize); 1949 } 1950 } 1951 1952 return f2->fr_next; 1953 } 1954 1955 1956 static u_32_t lookuphost(name, addr) 1957 char *name; 1958 i6addr_t *addr; 1959 { 1960 int i; 1961 1962 hashed = 0; 1963 pooled = 0; 1964 dynamic = -1; 1965 1966 for (i = 0; i < 4; i++) { 1967 if (strncmp(name, frc->fr_ifnames[i], 1968 sizeof(frc->fr_ifnames[i])) == 0) { 1969 ifpflag = FRI_DYNAMIC; 1970 dynamic = i; 1971 return 0; 1972 } 1973 } 1974 1975 if (gethost(name, addr, use_inet6) == -1) { 1976 fprintf(stderr, "unknown name \"%s\"\n", name); 1977 return 0; 1978 } 1979 return 1; 1980 } 1981 1982 1983 static void dobpf(v, phrase) 1984 int v; 1985 char *phrase; 1986 { 1987 #ifdef IPFILTER_BPF 1988 struct bpf_program bpf; 1989 struct pcap *p; 1990 #endif 1991 fakebpf_t *fb; 1992 u_32_t l; 1993 char *s; 1994 int i; 1995 1996 for (fr = frc; fr != NULL; fr = fr->fr_next) { 1997 if (fr->fr_type != FR_T_NONE) { 1998 fprintf(stderr, "cannot mix IPF and BPF matching\n"); 1999 return; 2000 } 2001 fr->fr_v = v; 2002 fr->fr_type = FR_T_BPFOPC; 2003 2004 if (!strncmp(phrase, "\"0x", 2)) { 2005 phrase++; 2006 fb = malloc(sizeof(fakebpf_t)); 2007 if (fb == NULL) 2008 yyerror("sorry, out of memory"); 2009 2010 for (i = 0, s = strtok(phrase, " \r\n\t"); s != NULL; 2011 s = strtok(NULL, " \r\n\t"), i++) { 2012 fb = realloc(fb, (i / 4 + 1) * sizeof(*fb)); 2013 if (fb == NULL) 2014 yyerror("sorry, out of memory"); 2015 l = (u_32_t)strtol(s, NULL, 0); 2016 switch (i & 3) 2017 { 2018 case 0 : 2019 fb[i / 4].fb_c = l & 0xffff; 2020 break; 2021 case 1 : 2022 fb[i / 4].fb_t = l & 0xff; 2023 break; 2024 case 2 : 2025 fb[i / 4].fb_f = l & 0xff; 2026 break; 2027 case 3 : 2028 fb[i / 4].fb_k = l; 2029 break; 2030 } 2031 } 2032 if ((i & 3) != 0) { 2033 fprintf(stderr, 2034 "Odd number of bytes in BPF code\n"); 2035 exit(1); 2036 } 2037 i--; 2038 fr->fr_dsize = (i / 4 + 1) * sizeof(*fb); 2039 fr->fr_data = fb; 2040 return; 2041 } 2042 2043 #ifdef IPFILTER_BPF 2044 bzero((char *)&bpf, sizeof(bpf)); 2045 p = pcap_open_dead(DLT_RAW, 1); 2046 if (!p) { 2047 fprintf(stderr, "pcap_open_dead failed\n"); 2048 return; 2049 } 2050 2051 if (pcap_compile(p, &bpf, phrase, 1, 0xffffffff)) { 2052 pcap_perror(p, "ipf"); 2053 pcap_close(p); 2054 fprintf(stderr, "pcap parsing failed (%s)\n", phrase); 2055 return; 2056 } 2057 pcap_close(p); 2058 2059 fr->fr_dsize = bpf.bf_len * sizeof(struct bpf_insn); 2060 fr->fr_data = malloc(fr->fr_dsize); 2061 if (fr->fr_data == NULL) 2062 yyerror("sorry, out of memory"); 2063 bcopy((char *)bpf.bf_insns, fr->fr_data, fr->fr_dsize); 2064 if (!bpf_validate(fr->fr_data, bpf.bf_len)) { 2065 fprintf(stderr, "BPF validation failed\n"); 2066 return; 2067 } 2068 #endif 2069 } 2070 2071 #ifdef IPFILTER_BPF 2072 if (opts & OPT_DEBUG) 2073 bpf_dump(&bpf, 0); 2074 #else 2075 fprintf(stderr, "BPF filter expressions not supported\n"); 2076 exit(1); 2077 #endif 2078 } 2079 2080 2081 static void resetaddr() 2082 { 2083 hashed = 0; 2084 pooled = 0; 2085 dynamic = -1; 2086 } 2087 2088 2089 static alist_t *newalist(ptr) 2090 alist_t *ptr; 2091 { 2092 alist_t *al; 2093 2094 al = malloc(sizeof(*al)); 2095 if (al == NULL) 2096 return NULL; 2097 al->al_not = 0; 2098 al->al_next = ptr; 2099 return al; 2100 } 2101 2102 2103 static int makepool(list) 2104 alist_t *list; 2105 { 2106 ip_pool_node_t *n, *top; 2107 ip_pool_t pool; 2108 alist_t *a; 2109 int num; 2110 2111 if (list == NULL) 2112 return 0; 2113 top = calloc(1, sizeof(*top)); 2114 if (top == NULL) 2115 return 0; 2116 2117 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2118 n->ipn_addr.adf_family = a->al_family; 2119 n->ipn_mask.adf_family = a->al_family; 2120 (void *)bcopy((void *)&a->al_i6addr, 2121 (void *)&n->ipn_addr.adf_addr, 2122 sizeof(n->ipn_addr.adf_addr)); 2123 (void *)bcopy((void *)&a->al_i6mask, 2124 (void *)&n->ipn_mask.adf_addr, 2125 sizeof(n->ipn_mask.adf_addr)); 2126 n->ipn_info = a->al_not; 2127 if (a->al_next != NULL) { 2128 n->ipn_next = calloc(1, sizeof(*n)); 2129 if (n->ipn_next == NULL) 2130 yyerror("sorry, out of memory"); 2131 n = n->ipn_next; 2132 } 2133 } 2134 2135 bzero((char *)&pool, sizeof(pool)); 2136 pool.ipo_unit = IPL_LOGIPF; 2137 pool.ipo_list = top; 2138 num = load_pool(&pool, ipfioctl[IPL_LOGLOOKUP]); 2139 2140 while ((n = top) != NULL) { 2141 top = n->ipn_next; 2142 free(n); 2143 } 2144 return num; 2145 } 2146 2147 2148 static u_int makehash(list) 2149 alist_t *list; 2150 { 2151 iphtent_t *n, *top; 2152 iphtable_t iph; 2153 alist_t *a; 2154 int num; 2155 2156 if (list == NULL) 2157 return 0; 2158 top = calloc(1, sizeof(*top)); 2159 if (top == NULL) 2160 return 0; 2161 2162 for (n = top, a = list; (n != NULL) && (a != NULL); a = a->al_next) { 2163 n->ipe_family = a->al_family; 2164 (void *)bcopy((void *)&a->al_i6addr, 2165 (void *)&n->ipe_addr, 2166 sizeof(n->ipe_addr)); 2167 (void *)bcopy((void *)&a->al_i6mask, 2168 (void *)&n->ipe_mask, 2169 sizeof(n->ipe_mask)); 2170 n->ipe_value = 0; 2171 if (a->al_next != NULL) { 2172 n->ipe_next = calloc(1, sizeof(*n)); 2173 if (n->ipe_next == NULL) 2174 yyerror("sorry, out of memory"); 2175 n = n->ipe_next; 2176 } 2177 } 2178 2179 bzero((char *)&iph, sizeof(iph)); 2180 iph.iph_unit = IPL_LOGIPF; 2181 iph.iph_type = IPHASH_LOOKUP; 2182 *iph.iph_name = '\0'; 2183 2184 if (load_hash(&iph, top, ipfioctl[IPL_LOGLOOKUP]) == 0) 2185 sscanf(iph.iph_name, "%u", &num); 2186 else 2187 num = 0; 2188 2189 while ((n = top) != NULL) { 2190 top = n->ipe_next; 2191 free(n); 2192 } 2193 return num; 2194 } 2195 2196 2197 void ipf_addrule(fd, ioctlfunc, ptr) 2198 int fd; 2199 ioctlfunc_t ioctlfunc; 2200 void *ptr; 2201 { 2202 ioctlcmd_t add, del; 2203 frentry_t *fr; 2204 ipfobj_t obj; 2205 2206 fr = ptr; 2207 add = 0; 2208 del = 0; 2209 2210 bzero((char *)&obj, sizeof(obj)); 2211 obj.ipfo_rev = IPFILTER_VERSION; 2212 obj.ipfo_size = sizeof(*fr); 2213 obj.ipfo_type = IPFOBJ_FRENTRY; 2214 obj.ipfo_ptr = ptr; 2215 2216 if ((opts & OPT_DONOTHING) != 0) 2217 fd = -1; 2218 2219 if (opts & OPT_ZERORULEST) { 2220 add = SIOCZRLST; 2221 } else if (opts & OPT_INACTIVE) { 2222 add = (u_int)fr->fr_hits ? SIOCINIFR : 2223 SIOCADIFR; 2224 del = SIOCRMIFR; 2225 } else { 2226 add = (u_int)fr->fr_hits ? SIOCINAFR : 2227 SIOCADAFR; 2228 del = SIOCRMAFR; 2229 } 2230 2231 if (fr && (opts & OPT_OUTQUE)) 2232 fr->fr_flags |= FR_OUTQUE; 2233 if (fr->fr_hits) 2234 fr->fr_hits--; 2235 if (fr && (opts & OPT_VERBOSE)) 2236 printfr(fr, ioctlfunc); 2237 2238 if (opts & OPT_DEBUG) { 2239 binprint(fr, sizeof(*fr)); 2240 if (fr->fr_data != NULL) 2241 binprint(fr->fr_data, fr->fr_dsize); 2242 } 2243 2244 if ((opts & OPT_ZERORULEST) != 0) { 2245 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2246 if ((opts & OPT_DONOTHING) == 0) { 2247 fprintf(stderr, "%d:", yylineNum); 2248 perror("ioctl(SIOCZRLST)"); 2249 } 2250 } else { 2251 #ifdef USE_QUAD_T 2252 printf("hits %qd bytes %qd ", 2253 (long long)fr->fr_hits, 2254 (long long)fr->fr_bytes); 2255 #else 2256 printf("hits %ld bytes %ld ", 2257 fr->fr_hits, fr->fr_bytes); 2258 #endif 2259 printfr(fr, ioctlfunc); 2260 } 2261 } else if ((opts & OPT_REMOVE) != 0) { 2262 if ((*ioctlfunc)(fd, del, (void *)&obj) == -1) { 2263 if ((opts & OPT_DONOTHING) != 0) { 2264 fprintf(stderr, "%d:", yylineNum); 2265 perror("ioctl(delete rule)"); 2266 } 2267 } 2268 } else { 2269 if ((*ioctlfunc)(fd, add, (void *)&obj) == -1) { 2270 if (!(opts & OPT_DONOTHING)) { 2271 fprintf(stderr, "%d:", yylineNum); 2272 perror("ioctl(add/insert rule)"); 2273 } 2274 } 2275 } 2276 } 2277 2278 static void setsyslog() 2279 { 2280 yysetdict(logwords); 2281 yybreakondot = 1; 2282 } 2283 2284 2285 static void unsetsyslog() 2286 { 2287 yyresetdict(); 2288 yybreakondot = 0; 2289 } 2290 2291 2292 static void fillgroup(fr) 2293 frentry_t *fr; 2294 { 2295 frentry_t *f; 2296 2297 for (f = frold; f != NULL; f = f->fr_next) 2298 if (strncmp(f->fr_grhead, fr->fr_group, FR_GROUPLEN) == 0) 2299 break; 2300 if (f == NULL) 2301 return; 2302 2303 /* 2304 * Only copy down matching fields if the rules are of the same type 2305 * and are of ipf type. The only fields that are copied are those 2306 * that impact the rule parsing itself, eg. need for knowing what the 2307 * protocol should be for rules with port comparisons in them. 2308 */ 2309 if (f->fr_type != fr->fr_type || f->fr_type != FR_T_IPF) 2310 return; 2311 2312 if (fr->fr_v == 0 && f->fr_v != 0) 2313 fr->fr_v = f->fr_v; 2314 2315 if (fr->fr_mproto == 0 && f->fr_mproto != 0) 2316 fr->fr_mproto = f->fr_mproto; 2317 if (fr->fr_proto == 0 && f->fr_proto != 0) 2318 fr->fr_proto = f->fr_proto; 2319 2320 if ((fr->fr_mproto == 0) && ((fr->fr_flx & FI_TCPUDP) == 0) && 2321 ((f->fr_flx & FI_TCPUDP) != 0)) 2322 fr->fr_flx |= FI_TCPUDP; 2323 } 2324