npf_scan.l revision 1.17
1 /* $NetBSD: npf_scan.l,v 1.17 2014/02/06 02:51:28 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 "-" return MINUS; 103 procedure return PROCEDURE; 104 \\\n yylineno++; yycolumn = 0; 105 \n yylineno++; yycolumn = 0; return SEPLINE; 106 ; return SEPLINE; 107 name return NAME; 108 group return GROUP; 109 default return DEFAULT; 110 in return IN; 111 out return OUT; 112 forw return FORW; 113 interface return INTERFACE; 114 all return ALL; 115 block return BLOCK; 116 pass return PASS; 117 pcap-filter return PCAP_FILTER; 118 stateful return STATEFUL; 119 apply return APPLY; 120 final return FINAL; 121 quick return FINAL; 122 on return ON; 123 inet6 return INET6; 124 inet4 return INET4; 125 inet return INET4; 126 proto return PROTO; 127 family return FAMILY; 128 tcp return TCP; 129 icmp { yylval.num = IPPROTO_ICMP; return ICMP; } 130 ipv6-icmp { yylval.num = IPPROTO_ICMPV6; return ICMP6; } 131 \"ipv6-icmp\" { yylval.num = IPPROTO_ICMPV6; return ICMP6; } 132 return-rst return RETURNRST; 133 return-icmp return RETURNICMP; 134 return return RETURN; 135 ruleset return RULESET; 136 from return FROM; 137 to return TO; 138 port return PORT; 139 flags return FLAGS; 140 icmp-type return ICMPTYPE; 141 code return CODE; 142 any return ANY; 143 144 "/" return SLASH; 145 "{" return CURLY_OPEN; 146 "}" return CURLY_CLOSE; 147 "(" return PAR_OPEN; 148 ")" return PAR_CLOSE; 149 "," return COMMA; 150 "=" return EQ; 151 152 "0x"[0-9a-fA-F]+ { 153 char *endp, *buf = ecalloc(1, yyleng + 1); 154 buf[yyleng] = 0; 155 yylval.num = strtoul(buf+2, &endp, 16); 156 free(buf); 157 return HEX; 158 } 159 160 {NUMBER}"."{NUMBER} { 161 char *endp, *buf = estrndup(yytext, yyleng); 162 yylval.fpnum = strtod(buf, &endp); 163 free(buf); 164 return FPNUM; 165 } 166 167 [0-9a-fA-F]+":"[0-9a-fA-F:]* { 168 yylval.str = estrndup(yytext, yyleng); 169 return IPV6ADDR; 170 } 171 172 {NUMBER}"."[0-9][0-9.]* { 173 yylval.str = estrndup(yytext, yyleng); 174 return IPV4ADDR; 175 } 176 177 {NUMBER} { 178 char *endp, *buf = estrndup(yytext, yyleng); 179 yylval.num = strtoul(buf, &endp, 10); 180 free(buf); 181 return NUM; 182 } 183 184 "<"{DID}">" { 185 yylval.str = estrndup(yytext + 1, yyleng - 2); 186 return TABLE_ID; 187 } 188 189 "$"{ID} { 190 yylval.str = estrndup(yytext + 1, yyleng - 1); 191 return VAR_ID; 192 } 193 194 {ID} { 195 yylval.str = estrndup(yytext, yyleng); 196 return IDENTIFIER; 197 } 198 199 \"[^\"]*\" { 200 yylval.str = estrndup(yytext + 1, yyleng - 2); 201 return STRING; 202 } 203 204 #.*$ /* drop comment until end of line */ 205 [ \t] /* eat whitespace */ 206 207 : return COLON; 208
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