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| author | Vadim Kochan <vadim4j@gmail.com> | 2016-01-26 22:25:04 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-01-28 16:15:17 +0100 |
| commit | f3c3677c5dd67d7edda5bee5b316e014be231337 (patch) | |
| tree | fba2a79fc32b2e753cc0ea1b46882c0cf6507960 /trafgen_lexer.l | |
| parent | 5ad97d9ef3f77a246a588f4256d92f831e542f5d (diff) | |
trafgen: parser: Add syntax to generate Ethernet header fields
Add function 'eth()' to support generating Ethernet header fields from the
trafgen configuration language.
Supported fields:
da|daddr destination address, default: 00:00:00:00:00:00
sa|saddr source address, default: device MAC
prot|proto protocol number, default: 0x0000
Example usage:
{ eth(prot=0x0800, da=11:22:33:44:55:66), fill(0xff, 60) }
{ eth(prot=0x0800) }
{ eth() }
It is important that proto_init is called before fields will be filled
to initialize the specified proto with header fields.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: document supported keywords in commit message]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'trafgen_lexer.l')
| -rw-r--r-- | trafgen_lexer.l | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/trafgen_lexer.l b/trafgen_lexer.l index 6c27b0c..d209116 100644 --- a/trafgen_lexer.l +++ b/trafgen_lexer.l @@ -19,6 +19,7 @@ #include "trafgen_parser.tab.h" #include "xmalloc.h" #include "built_in.h" +#include "str.h" extern void yyerror(const char *); @@ -75,6 +76,9 @@ number_bin ([0]?[b][0-1]+) number_dec (([0])|([1-9][0-9]*)) number_ascii ([a-zA-Z]) +mac_hex ([a-fA-F0-9]+) +mac ({mac_hex}:{mac_hex}:{mac_hex}:{mac_hex}:{mac_hex}:{mac_hex}) + %% "cpu" { return K_CPU; } @@ -99,6 +103,12 @@ number_ascii ([a-zA-Z]) "const32"|"c32" { return K_CONST32; } "const64"|"c64" { return K_CONST64; } +"daddr"|"da" { return K_DADDR; } +"saddr"|"sa" { return K_SADDR; } +"prot"[o]? { return K_PROT; } + +"eth" { return K_ETH; } + [ ]*"-"[ ]* { return '-'; } [ ]*"+"[ ]* { return '+'; } [ ]*"*"[ ]* { return '*'; } @@ -117,6 +127,7 @@ number_ascii ([a-zA-Z]) "]" { return ']'; } "," { return ','; } ":" { return ':'; } +"=" { return '='; } "\n" { yylineno++; } @@ -146,6 +157,10 @@ number_ascii ([a-zA-Z]) {number_ascii} { yylval.number = (uint8_t) (*yytext); return number; } +{mac} { if (str2mac(yytext, yylval.bytes, 256)) + panic("Failed to parse MAC address %s\n", yytext); + return mac; } + "'\\x"[a-fA-F0-9]{2}"'" { yylval.number = strtol(yytext + 3, NULL, 16); return number; } |