2 * netsniff-ng - the packet sniffing beast
3 * By Daniel Borkmann <daniel@netsniff-ng.org>
4 * Copyright 2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
5 * Swiss federal institute of technology (ETH Zurich)
6 * Subject to the GPL, version 2.
9 /* lex-func-prefix: yy */
18 #include "bpf_parser.tab.h"
21 extern void yyerror(const char *);
42 number_dec {digit_n}|{digit_s}{digit}*
43 number_oct {digit_n}{digit}+
44 number_hex {digit_n}{hex_x}{hex}+
45 number_bin {digit_n}{bindigit_b}{bindigit}+
49 label {label_s}{label_me}+
53 "ldb" { return OP_LDB; }
54 "ldh" { return OP_LDH; }
55 "ld" { return OP_LD; }
56 "ldx" { return OP_LDX; }
57 "ldxb" { return OP_LDXB; }
58 "st" { return OP_ST; }
59 "stx" { return OP_STX; }
60 "jmp"|"ja" { return OP_JMP; }
61 "jeq" { return OP_JEQ; }
62 "jgt" { return OP_JGT; }
63 "jge" { return OP_JGE; }
64 "jset" { return OP_JSET; }
65 "add" { return OP_ADD; }
66 "sub" { return OP_SUB; }
67 "mul" { return OP_MUL; }
68 "div" { return OP_DIV; }
69 "mod" { return OP_MOD; }
70 "neg" { return OP_NEG; }
71 "and" { return OP_AND; }
72 "xor" { return OP_XOR; }
73 "or" { return OP_OR; }
74 "lsh" { return OP_LSH; }
75 "rsh" { return OP_RSH; }
76 "ret" { return OP_RET; }
77 "tax" { return OP_TAX; }
78 "txa" { return OP_TXA; }
79 "len"|"pktlen" { return K_PKT_LEN; }
80 "pto"|"proto" { return K_PROTO; }
81 "type" { return K_TYPE; }
82 "ifx"|"ifidx" { return K_IFIDX; }
83 "nla" { return K_NLATTR; }
84 "nlan" { return K_NLATTR_NEST; }
85 "mark" { return K_MARK; }
86 "que"|"queue" { return K_QUEUE; }
87 "hat"|"hatype" { return K_HATYPE; }
88 "rxh"|"rxhash" { return K_RXHASH; }
89 "cpu" { return K_CPU; }
105 {number_hex} { yylval.number = strtoul(yytext, NULL, 16);
108 {number_dec} { yylval.number = strtol(yytext, NULL, 10);
111 {number_oct} { yylval.number = strtol(yytext, NULL, 8);
114 {number_bin} { yylval.number = strtol(yytext + 2, NULL, 2);
117 {label} { yylval.label = xstrdup(yytext);
120 "/*"([^\*]|\*[^/])*"*/" { /* NOP */ }
121 ";"[^\n]* {/* NOP */}
124 . { printf("Unknown character '%s'", yytext);
125 yyerror("lex Unknown character"); }