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usb_replay.y
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usb_replay.y
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%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "usb_replay.h"
#include "error.h"
int yylex(void);
void yyerror(char *);
extern char *yytext;
#define YYSTYPE urb_t *
%}
%token CTRL BULK INTR ISOC OUT IN HEX FLOAT
%%
document:
document packet '\n' { perform_transfer(yylval); }
|
;
direction:
| OUT { yylval->direction = OUT; }
| IN { yylval->direction = IN; }
endpoint: '('
FLOAT { sscanf(yytext, "%d.%d", &(yylval->device_address), &(yylval->endpoint)); }
')'
timestamp: '#' FLOAT
non_ctrl:
| BULK { yylval->type = BULK; }
| INTR { yylval->type = INTR; }
| ISOC { yylval->type = ISOC; }
bmRequestType: HEX { yylval->bmRequestType = hex_to_int(yytext); }
bRequest: HEX { yylval->bRequest = hex_to_int(yytext); }
wValue: HEX { yylval->wValue = hex_to_int(yytext); }
wIndex: HEX { yylval->wIndex = hex_to_int(yytext); }
data: HEX { hex_to_buf(yytext, yylval->data); yylval->data_size = strlen(yytext) / 2; }
packet_body:
| CTRL '_' direction endpoint ':' bmRequestType ':' bRequest ':' wValue ':' wIndex ':' data
{
yylval->type = CTRL;
}
| non_ctrl '_' direction endpoint ':' data
;
packet: packet_body { yylval->timing = 0; }
| packet_body timestamp { sscanf(yytext, "%Lf", &(yylval->timing)); }
;
%%
void yyerror(char *s) {
fprintf(stderr, "%s\n", s);
}
int main(int argc, char **argv) {
/* Parsing args */
if(argc != 3) {
print_help_and_exit(argv);
}
int vid, pid;
if(!sscanf(argv[1], "%x:%x", &vid, &pid)) {
ERROR("Couldn't parse vid:pid");
}
/* Initializations */
if(!freopen(argv[2], "r", stdin)) {
PERROR("Couldn't open file\n");
}
if(!(yylval = malloc(sizeof(urb_t)))) {
ERROR("Couldn't malloc");
}
usb_init(vid, pid);
printf("Sending traffic... ");
fflush(stdout);
yyparse();
printf("\n");
/* Dismiss */
free(yylval);
fclose(stdin);
return 0;
}