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/*
* netsniff-ng - the packet sniffing beast
* By Daniel Borkmann <daniel@netsniff-ng.org>
* Copyright 2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
* Swiss federal institute of technology (ETH Zurich)
* Subject to the GPL, version 2.
*/
/* lex-func-prefix: yy */
%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "bpf_parser.tab.h"
#include "xmalloc.h"
extern void yyerror(const char *);
%}
%option align
%option nounput
%option noyywrap
%option noreject
%option 8bit
%option caseless
%option noinput
%option nodefault
number_oct ([0][0-9]+)
number_hex ([0][x][a-fA-F0-9]+)
number_bin ([0][b][0-1]+)
number_dec (([0])|([-+]?[1-9][0-9]*))
label [a-zA-Z_][a-zA-Z0-9_]+
%%
"ldb" { return OP_LDB; }
"ldh" { return OP_LDH; }
"ld" { return OP_LD; }
"ldi" { return OP_LDI; }
"ldx" { return OP_LDX; }
"ldxi" { return OP_LDXI; }
"ldxb" { return OP_LDXB; }
"st" { return OP_ST; }
"stx" { return OP_STX; }
"jmp"|"ja" { return OP_JMP; }
"jeq" { return OP_JEQ; }
"jneq"|"jne" { return OP_JNEQ; }
"jlt" { return OP_JLT; }
"jle" { return OP_JLE; }
"jgt" { return OP_JGT; }
"jge" { return OP_JGE; }
"jset" { return OP_JSET; }
"add" { return OP_ADD; }
"sub" { return OP_SUB; }
"mul" { return OP_MUL; }
"div" { return OP_DIV; }
"mod" { return OP_MOD; }
"neg" { return OP_NEG; }
"and" { return OP_AND; }
"xor" { return OP_XOR; }
"or" { return OP_OR; }
"lsh" { return OP_LSH; }
"rsh" { return OP_RSH; }
"ret" { return OP_RET; }
"tax" { return OP_TAX; }
"txa" { return OP_TXA; }
"#"?("len"|"pktlen") { return K_PKT_LEN; }
"#"?("pto"|"proto") { return K_PROTO; }
"#"?("type") { return K_TYPE; }
"#"?("poff") { return K_POFF; }
"#"?("ifx"|"ifidx") { return K_IFIDX; }
"#"?("nla") { return K_NLATTR; }
"#"?("nlan") { return K_NLATTR_NEST; }
"#"?("mark") { return K_MARK; }
"#"?("que"|"queue"|"Q") { return K_QUEUE; }
"#"?("hat"|"hatype") { return K_HATYPE; }
"#"?("rxh"|"rxhash") { return K_RXHASH; }
"#"?("cpu") { return K_CPU; }
"#"?("vlant"|"vlan_tci") { return K_VLANT; }
"#"?("vlana"|"vlan_acc") { return K_VLANP; }
"#"?("vlanp") { return K_VLANP; }
":" { return ':'; }
"," { return ','; }
"#" { return '#'; }
"[" { return '['; }
"]" { return ']'; }
"(" { return '('; }
")" { return ')'; }
"x" { return 'x'; }
"a" { return 'a'; }
"+" { return '+'; }
"M" { return 'M'; }
"*" { return '*'; }
"&" { return '&'; }
{number_hex} { yylval.number = strtoul(yytext, NULL, 16);
return number; }
{number_oct} { yylval.number = strtol(yytext + 1, NULL, 8);
return number; }
{number_bin} { yylval.number = strtol(yytext + 2, NULL, 2);
return number; }
{number_dec} { yylval.number = strtol(yytext, NULL, 10);
return number; }
{label} { yylval.label = xstrdup(yytext);
return label; }
"/*"([^\*]|\*[^/])*"*/" { /* NOP */ }
";"[^\n]* {/* NOP */}
^#.* {/* NOP */}
"\n" { yylineno++; }
[ \t]+ {/* NOP */ }
. { printf("Unknown character '%s'", yytext);
yyerror("lex Unknown character"); }
%%
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