d7a561a137
- Fixes a bunch of bugs related to ematches
- Adds support for the nbyte ematch
- Adds a bison/flex parser for ematch expressions, expressions
may look like this:
ip.length > 256 && pattern(ip6.src = 3ffe::/16)
documenation on syntax follows
- adds ematch support to the basic classifier (--ematch EXPR)
105 lines
2.3 KiB
Text
105 lines
2.3 KiB
Text
/*
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* lib/route/cls/ematch_grammar.l ematch expression grammar
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
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*/
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%{
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#include <netlink-local.h>
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#include <netlink-tc.h>
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#include <netlink/netlink.h>
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#include <netlink/route/cls/ematch.h>
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#include <netlink/route/cls/ematch/cmp.h>
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#include "ematch_syntax.h"
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%}
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%option 8bit
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%option reentrant
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%option warn
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%option noyywrap
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%option noinput
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%option nounput
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%option bison-bridge
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%option prefix="ematch_"
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%x QUOTE
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%%
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[ \t\r\n]+
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\" {
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NL_DBG(4, "Beginning of quote\n");
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yylval->q.len = 32;
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if (!(yylval->q.data = calloc(1, yylval->q.len)))
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return ERROR;
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yylval->q.index = 0;
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BEGIN(QUOTE);
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}
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<QUOTE>[^\\\n\"]+ {
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memcpy(yylval->q.data + yylval->q.index, yytext,
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strlen(yytext));
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yylval->q.index += strlen(yytext);
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}
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<QUOTE>\" {
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BEGIN(0);
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return QUOTED;
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}
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[[:digit:]]+ |
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0[xX][[:xdigit:]]+ {
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yylval->i = strtoul(yytext, NULL, 0);
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return NUMBER;
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}
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eq |
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"=" return KW_EQ;
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gt |
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">" return KW_GT;
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lt |
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"<" return KW_LT;
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[aA][nN][dD] |
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"&&" { yylval->i = TCF_EM_REL_AND; return LOGIC; }
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[oO][rR] |
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"||" { yylval->i = TCF_EM_REL_OR; return LOGIC; }
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[nN][oO][tT] |
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"!" return NOT;
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[cC][mM][pP] { yylval->i = TCF_EM_CMP; return EMATCH_CMP; }
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[pP][aA][tT][tT][eE][rR][nN] { yylval->i = TCF_EM_NBYTE; return EMATCH_NBYTE; }
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"(" return KW_OPEN;
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")" return KW_CLOSE;
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[mM][aA][sS][kK] return KW_MASK;
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[aA][tT] return KW_AT;
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"+" return KW_PLUS;
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[uU]8 { yylval->i = TCF_EM_ALIGN_U8; return ALIGN; }
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[uU]16 { yylval->i = TCF_EM_ALIGN_U16; return ALIGN; }
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[uU]32 { yylval->i = TCF_EM_ALIGN_U32; return ALIGN; }
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[lL][iI][nN][kK] |
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[eE][tT][hH] { yylval->i = TCF_LAYER_LINK; return LAYER; }
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[nN][eE][tT] |
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[iI][pP]6 |
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[iI][pP] { yylval->i = TCF_LAYER_NETWORK; return LAYER; }
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[tT][rR][aA][nN][sS][pP][oO][rR][tT] |
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[tT][cC][pP] { yylval->i = TCF_LAYER_TRANSPORT; return LAYER; }
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[^ \t\r\n+()=<>&|\"]+ {
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yylval->s = strdup(yytext);
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if (yylval->s == NULL)
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return ERROR;
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NL_DBG(4, "lex STR=%s\n", yylval->s);
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return STR;
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}
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