npf_scan.l revision 1.20
1 /* $NetBSD: npf_scan.l,v 1.20 2014/03/14 11:29:45 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2011-2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Martin Husemann. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 %{ 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <err.h> 36 37 #include "npfctl.h" 38 #include "npf_parse.h" 39 40 int yycolumn; 41 42 #define YY_USER_ACTION yycolumn += yyleng; 43 44 extern int yyparsetarget; 45 extern int yylineno; 46 extern const char * yyfilename; 47 extern int yyparse(void); 48 extern void yyrestart(FILE *); 49 50 void 51 npfctl_parse_file(const char *name) 52 { 53 FILE *fp; 54 55 fp = fopen(name, "r"); 56 if (fp == NULL) { 57 err(EXIT_FAILURE, "open '%s'", name); 58 } 59 yyparsetarget = NPFCTL_PARSE_FILE; 60 yyrestart(fp); 61 yylineno = 1; 62 yycolumn = 0; 63 yyfilename = name; 64 yyparse(); 65 fclose(fp); 66 } 67 68 void 69 npfctl_parse_string(const char *str) 70 { 71 YY_BUFFER_STATE bs; 72 73 yyparsetarget = NPFCTL_PARSE_STRING; 74 bs = yy_scan_string(str); 75 yyfilename = "stdin"; 76 yyparse(); 77 yy_delete_buffer(bs); 78 } 79 80 %} 81 82 %option noyywrap nounput noinput 83 84 ID [a-zA-Z_][a-zA-Z_0-9]* 85 DID [a-zA-Z_][a-zA-Z_0-9-]* 86 NUMBER [0-9]+ 87 88 %% 89 alg return ALG; 90 table return TABLE; 91 type return TYPE; 92 hash return HASH; 93 tree return TREE; 94 cdb return CDB; 95 static return TSTATIC; 96 dynamic return TDYNAMIC; 97 file return TFILE; 98 map return MAP; 99 "<->" return ARROWBOTH; 100 "<-" return ARROWLEFT; 101 "->" return ARROWRIGHT; 102 algo return ALGO; 103 npt66 return NPT66; 104 "-" return MINUS; 105 procedure return PROCEDURE; 106 \\\n yylineno++; yycolumn = 0; 107 \n yylineno++; yycolumn = 0; return SEPLINE; 108 ; return SEPLINE; 109 name return NAME; 110 group return GROUP; 111 default return DEFAULT; 112 in return IN; 113 out return OUT; 114 forw return FORW; 115 interface return INTERFACE; 116 all return ALL; 117 block return BLOCK; 118 pass return PASS; 119 pcap-filter return PCAP_FILTER; 120 stateful return STATEFUL; 121 stateful-ends return STATEFUL_ENDS; 122 apply return APPLY; 123 final return FINAL; 124 quick return FINAL; 125 on return ON; 126 inet6 return INET6; 127 inet4 return INET4; 128 proto return PROTO; 129 family return FAMILY; 130 tcp return TCP; 131 icmp { yylval.num = IPPROTO_ICMP; return ICMP; } 132 ipv6-icmp { yylval.num = IPPROTO_ICMPV6; return ICMP6; } 133 \"ipv6-icmp\" { yylval.num = IPPROTO_ICMPV6; return ICMP6; } 134 return-rst return RETURNRST; 135 return-icmp return RETURNICMP; 136 return return RETURN; 137 ruleset return RULESET; 138 from return FROM; 139 to return TO; 140 port return PORT; 141 flags return FLAGS; 142 icmp-type return ICMPTYPE; 143 code return CODE; 144 any return ANY; 145 146 "/" return SLASH; 147 "{" return CURLY_OPEN; 148 "}" return CURLY_CLOSE; 149 "(" return PAR_OPEN; 150 ")" return PAR_CLOSE; 151 "," return COMMA; 152 "=" return EQ; 153 154 "0x"[0-9a-fA-F]+ { 155 char *endp, *buf = ecalloc(1, yyleng + 1); 156 buf[yyleng] = 0; 157 yylval.num = strtoul(buf+2, &endp, 16); 158 free(buf); 159 return HEX; 160 } 161 162 {NUMBER}"."{NUMBER} { 163 char *endp, *buf = estrndup(yytext, yyleng); 164 yylval.fpnum = strtod(buf, &endp); 165 free(buf); 166 return FPNUM; 167 } 168 169 [0-9a-fA-F]+":"[0-9a-fA-F:]* { 170 yylval.str = estrndup(yytext, yyleng); 171 return IPV6ADDR; 172 } 173 174 {NUMBER}"."[0-9][0-9.]* { 175 yylval.str = estrndup(yytext, yyleng); 176 return IPV4ADDR; 177 } 178 179 {NUMBER} { 180 char *endp, *buf = estrndup(yytext, yyleng); 181 yylval.num = strtoul(buf, &endp, 10); 182 free(buf); 183 return NUM; 184 } 185 186 "<"{DID}">" { 187 yylval.str = estrndup(yytext + 1, yyleng - 2); 188 return TABLE_ID; 189 } 190 191 "$"{ID} { 192 yylval.str = estrndup(yytext + 1, yyleng - 1); 193 return VAR_ID; 194 } 195 196 {ID} { 197 yylval.str = estrndup(yytext, yyleng); 198 return IDENTIFIER; 199 } 200 201 \"[^\"]*\" { 202 yylval.str = estrndup(yytext + 1, yyleng - 2); 203 return STRING; 204 } 205 206 #.*$ /* drop comment until end of line */ 207 [ \t] /* eat whitespace */ 208 209 : return COLON; 210
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