%{ /* $OpenBSD: scanner.l,v 1.33 2024/09/24 14:20:31 sthen Exp $ */ /* * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #include #include #include #include #include #include #include "pcap-int.h" #include "gencode.h" #include #ifdef INET6 #include #include #endif /*INET6*/ #ifdef HAVE_OS_PROTO_H #include "os-proto.h" #endif #include "grammar.h" static int stoi(char *); static inline int xdtoi(int); #ifdef FLEX_SCANNER #define YY_NO_UNPUT #undef YY_INPUT #define YY_INPUT(buf, result, max)\ {\ const char *src = in_buffer;\ int i;\ \ if (*src == 0)\ result = YY_NULL;\ else {\ for (i = 0; *src && i < max; ++i)\ buf[i] = *src++;\ in_buffer += i;\ result = i;\ }\ } #else #undef getc #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++) #endif extern YYSTYPE yylval; static const char *in_buffer; %} N ([0-9]+|(0X|0x)[0-9A-Fa-f]+) B ([0-9A-Fa-f][0-9A-Fa-f]?) W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?) %a 15000 %o 17000 %e 6000 %k 4000 %p 19000 V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: V660 ::{W}:{W}:{W}:{W}:{W}:{W} V661 {W}::{W}:{W}:{W}:{W}:{W} V662 {W}:{W}::{W}:{W}:{W}:{W} V663 {W}:{W}:{W}::{W}:{W}:{W} V664 {W}:{W}:{W}:{W}::{W}:{W} V665 {W}:{W}:{W}:{W}:{W}::{W} V666 {W}:{W}:{W}:{W}:{W}:{W}:: V650 ::{W}:{W}:{W}:{W}:{W} V651 {W}::{W}:{W}:{W}:{W} V652 {W}:{W}::{W}:{W}:{W} V653 {W}:{W}:{W}::{W}:{W} V654 {W}:{W}:{W}:{W}::{W} V655 {W}:{W}:{W}:{W}:{W}:: V640 ::{W}:{W}:{W}:{W} V641 {W}::{W}:{W}:{W} V642 {W}:{W}::{W}:{W} V643 {W}:{W}:{W}::{W} V644 {W}:{W}:{W}:{W}:: V630 ::{W}:{W}:{W} V631 {W}::{W}:{W} V632 {W}:{W}::{W} V633 {W}:{W}:{W}:: V620 ::{W}:{W} V621 {W}::{W} V622 {W}:{W}:: V610 ::{W} V611 {W}:: V600 :: V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} V6104 ::{W}:{N}\.{N}\.{N}\.{N} V6114 {W}::{N}\.{N}\.{N}\.{N} V6004 ::{N}\.{N}\.{N}\.{N} V6 ({V680}|{V670}|{V671}|{V672}|{V673}|{V674}|{V675}|{V676}|{V677}|{V660}|{V661}|{V662}|{V663}|{V664}|{V665}|{V666}|{V650}|{V651}|{V652}|{V653}|{V654}|{V655}|{V640}|{V641}|{V642}|{V643}|{V644}|{V630}|{V631}|{V632}|{V633}|{V620}|{V621}|{V622}|{V610}|{V611}|{V600}|{V6604}|{V6504}|{V6514}|{V6524}|{V6534}|{V6544}|{V6554}|{V6404}|{V6414}|{V6424}|{V6434}|{V6444}|{V6304}|{V6314}|{V6324}|{V6334}|{V6204}|{V6214}|{V6224}|{V6104}|{V6114}|{V6004}) %% dst return DST; src return SRC; link|ether|ppp|slip return LINK; fddi return LINK; arp return ARP; rarp return RARP; ip return IP; tcp return TCP; udp return UDP; icmp return ICMP; igmp return IGMP; igrp return IGRP; pim return PIM; ip6 return IPV6; icmp6 return ICMPV6; ah return AH; esp return ESP; atalk return ATALK; decnet return DECNET; lat return LAT; sca return SCA; moprc return MOPRC; mopdl return MOPDL; stp return STP; host return HOST; net return NET; mask return MASK; port return PORT; proto return PROTO; protochain { #ifdef NO_PROTOCHAIN bpf_error("%s not supported", yytext); #else return PROTOCHAIN; #endif } gateway return GATEWAY; less return LESS; greater return GREATER; byte return BYTE; broadcast return TK_BROADCAST; multicast return TK_MULTICAST; and|"&&" return AND; or|"||" return OR; not return '!'; len|length return LEN; rnd|random return RND; sample return SAMPLE; inbound return INBOUND; outbound return OUTBOUND; vlan return VLAN; mpls return MPLS; on|ifname return PF_IFNAME; rset|ruleset return PF_RSET; rnr|rulenum return PF_RNR; srnr|subrulenum return PF_SRNR; reason return PF_REASON; action return PF_ACTION; wlan return LINK; type return TYPE; subtype return SUBTYPE; direction|dir return DIR; address1|addr1 return ADDR1; address2|addr2 return ADDR2; address3|addr3 return ADDR3; address4|addr4 return ADDR4; [ \n\t] ; [+\-*/:\[\]!<>()&|=] return yytext[0]; ">=" return GEQ; "<=" return LEQ; "!=" return NEQ; "==" return '='; "<<" return LSH; ">>" return RSH; {N} { yylval.i = stoi((char *)yytext); return NUM; } ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) { yylval.s = sdup((char *)yytext); return HID; } {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext); return EID; } {V6} { #ifdef INET6 struct addrinfo hints, *res; memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; hints.ai_flags = AI_NUMERICHOST; if (getaddrinfo(yytext, NULL, &hints, &res)) bpf_error("bogus IPv6 address %s", yytext); else { yylval.e = sdup((char *)yytext); return HID6; } #else bpf_error("IPv6 address %s not supported", yytext); #endif /*INET6*/ } {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); } icmptype { yylval.i = 0; return NUM; } icmpcode { yylval.i = 1; return NUM; } icmp-echoreply { yylval.i = 0; return NUM; } icmp-unreach { yylval.i = 3; return NUM; } icmp-sourcequench { yylval.i = 4; return NUM; } icmp-redirect { yylval.i = 5; return NUM; } icmp-echo { yylval.i = 8; return NUM; } icmp-routeradvert { yylval.i = 9; return NUM; } icmp-routersolicit { yylval.i = 10; return NUM; } icmp-timxceed { yylval.i = 11; return NUM; } icmp-paramprob { yylval.i = 12; return NUM; } icmp-tstamp { yylval.i = 13; return NUM; } icmp-tstampreply { yylval.i = 14; return NUM; } icmp-ireq { yylval.i = 15; return NUM; } icmp-ireqreply { yylval.i = 16; return NUM; } icmp-maskreq { yylval.i = 17; return NUM; } icmp-maskreply { yylval.i = 18; return NUM; } tcpflags { yylval.i = 13; return NUM; } tcp-fin { yylval.i = 0x01; return NUM; } tcp-syn { yylval.i = 0x02; return NUM; } tcp-rst { yylval.i = 0x04; return NUM; } tcp-push { yylval.i = 0x08; return NUM; } tcp-ack { yylval.i = 0x10; return NUM; } tcp-urg { yylval.i = 0x20; return NUM; } [A-Za-z0-9][-_.A-Za-z0-9]*[.A-Za-z0-9] { yylval.s = sdup((char *)yytext); return ID; } [A-Za-z] { yylval.s = sdup((char *)yytext); return ID; } "\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; } [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { size_t len = strlen(yytext) * 4 + 1; char *v = malloc(len); if (v != NULL) strnvis(v, yytext, len, 0); bpf_error("illegal token: %s", v); free(v); } . { char v[5]; vis(v, *yytext, VIS_OCTAL, 0); bpf_error("illegal char '%s'", v); } %% void lex_init(const char *buf) { in_buffer = buf; yyrestart(NULL); } /* * Also define a yywrap. Note that if we're using flex, it will * define a macro to map this identifier to pcap_wrap. */ int yywrap(void) { return 1; } /* Hex digit to integer. */ static inline int xdtoi(int c) { if (isdigit(c)) return c - '0'; else if (islower(c)) return c - 'a' + 10; else return c - 'A' + 10; } /* * Convert string to integer. Just like atoi(), but checks for * preceding 0x or 0 and uses hex or octal instead of decimal. */ static int stoi(char *s) { int base = 10; int n = 0; if (*s == '0') { if (s[1] == 'x' || s[1] == 'X') { s += 2; base = 16; } else { base = 8; s += 1; } } while (*s) n = n * base + xdtoi(*s++); return n; }