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 /* yaac-func-prefix: yy */
20 #include "trafgen_parser.tab.h"
21 #include "trafgen_conf.h"
25 #define YYERROR_VERBOSE 0
27 #define YYENABLE_NLS 1
28 #define YYLTYPE_IS_TRIVIAL 1
32 extern
int yylex(void);
33 extern
void yyerror(const char *);
37 extern
struct packet
*packets
;
39 #define packet_last (plen - 1)
40 #define payload_last (packets[packet_last].len - 1)
42 extern
struct packet_dyn
*packet_dyn
;
44 #define packetd_last (dlen - 1)
45 #define packetdc_last (packet_dyn[packetd_last].clen - 1)
46 #define packetdr_last (packet_dyn[packetd_last].rlen - 1)
48 static int dfunc_note_flag
= 0, our_cpu
, min_cpu
= -1, max_cpu
= -1;
50 static inline
int test_ignore
(void)
52 if
(min_cpu
< 0 && max_cpu
< 0)
54 else if
(max_cpu
>= our_cpu
&& min_cpu
<= our_cpu
)
60 static void give_note_dynamic
(void)
62 if
(!dfunc_note_flag
) {
63 printf
("Note: dynamic elements like drnd, dinc, ddec and "
64 "others make trafgen slower!\n");
69 static inline
void __init_new_packet_slot
(struct packet
*slot
)
75 static inline
void __init_new_counter_slot
(struct packet_dyn
*slot
)
81 static inline
void __init_new_randomizer_slot
(struct packet_dyn
*slot
)
87 static void realloc_packet
(void)
93 packets
= xrealloc
(packets
, 1, plen
* sizeof
(*packets
));
95 __init_new_packet_slot
(&packets
[packet_last
]);
98 packet_dyn
= xrealloc
(packet_dyn
, 1, dlen
* sizeof
(*packet_dyn
));
100 __init_new_counter_slot
(&packet_dyn
[packetd_last
]);
101 __init_new_randomizer_slot
(&packet_dyn
[packetd_last
]);
104 static void set_byte
(uint8_t val
)
106 struct packet
*pkt
= &packets
[packet_last
];
112 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
113 pkt
->payload
[payload_last
] = val
;
116 static void set_fill
(uint8_t val
, size_t len
)
119 struct packet
*pkt
= &packets
[packet_last
];
125 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
126 for
(i
= 0; i
< len
; ++i
)
127 pkt
->payload
[payload_last
- i
] = val
;
130 static void set_rnd
(size_t len
)
133 struct packet
*pkt
= &packets
[packet_last
];
139 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
140 for
(i
= 0; i
< len
; ++i
)
141 pkt
->payload
[payload_last
- i
] = (uint8_t) rand
();
144 static void set_seqinc
(uint8_t start
, size_t len
, uint8_t stepping
)
147 struct packet
*pkt
= &packets
[packet_last
];
153 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
154 for
(i
= 0; i
< len
; ++i
) {
155 off_t off
= len
- 1 - i
;
157 pkt
->payload
[payload_last
- off
] = start
;
162 static void set_seqdec
(uint8_t start
, size_t len
, uint8_t stepping
)
165 struct packet
*pkt
= &packets
[packet_last
];
171 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
172 for
(i
= 0; i
< len
; ++i
) {
173 int off
= len
- 1 - i
;
175 pkt
->payload
[payload_last
- off
] = start
;
180 static inline
void __setup_new_counter
(struct counter
*c
, uint8_t start
,
181 uint8_t stop
, uint8_t stepping
,
187 c
->val
= (type
== TYPE_INC
) ? start
: stop
;
188 c
->off
= payload_last
;
192 static inline
void __setup_new_randomizer
(struct randomizer
*r
)
194 r
->val
= (uint8_t) rand
();
195 r
->off
= payload_last
;
198 static void set_drnd
(void)
200 struct packet
*pkt
= &packets
[packet_last
];
201 struct packet_dyn
*pktd
= &packet_dyn
[packetd_last
];
209 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
212 pktd
->rnd
= xrealloc
(pktd
->rnd
, 1, pktd
->rlen
* sizeof
(struct randomizer
));
214 __setup_new_randomizer
(&pktd
->rnd
[packetdr_last
]);
217 static void set_dincdec
(uint8_t start
, uint8_t stop
, uint8_t stepping
, int type
)
219 struct packet
*pkt
= &packets
[packet_last
];
220 struct packet_dyn
*pktd
= &packet_dyn
[packetd_last
];
228 pkt
->payload
= xrealloc
(pkt
->payload
, 1, pkt
->len
);
231 pktd
->cnt
=xrealloc
(pktd
->cnt
, 1, pktd
->clen
* sizeof
(struct counter
));
233 __setup_new_counter
(&pktd
->cnt
[packetdc_last
], start
, stop
, stepping
, type
);
242 %token K_COMMENT K_FILL K_RND K_SEQINC K_SEQDEC K_DRND K_DINC K_DDEC K_WHITE K_CPU
244 %token
',' '{' '}' '(' ')' '[' ']' ':'
248 %type
<number
> number
255 | packets inline_comment
{ }
256 | packets K_WHITE
{ }
264 : '{' delimiter payload delimiter
'}' {
265 min_cpu
= max_cpu
= -1;
268 | K_CPU
'(' number
':' number
')' ':' K_WHITE
'{' delimiter payload delimiter
'}' {
272 if
(min_cpu
> max_cpu
) {
280 | K_CPU
'(' number
')' ':' K_WHITE
'{' delimiter payload delimiter
'}' {
281 min_cpu
= max_cpu
= $3;
288 | payload elem_delimiter
{ }
302 : K_FILL
'(' number delimiter number
')'
303 { set_fill
($3, $5); }
307 : K_RND
'(' number
')'
312 : K_SEQINC
'(' number delimiter number
')'
313 { set_seqinc
($3, $5, 1); }
314 | K_SEQINC
'(' number delimiter number delimiter number
')'
315 { set_seqinc
($3, $5, $7); }
319 : K_SEQDEC
'(' number delimiter number
')'
320 { set_seqdec
($3, $5, 1); }
321 | K_SEQDEC
'(' number delimiter number delimiter number
')'
322 { set_seqdec
($3, $5, $7); }
328 | K_DRND
'(' number
')'
331 for
(i
= 0; i
< max
; ++i
)
337 : K_DINC
'(' number delimiter number
')'
338 { set_dincdec
($3, $5, 1, TYPE_INC
); }
339 | K_DINC
'(' number delimiter number delimiter number
')'
340 { set_dincdec
($3, $5, $7, TYPE_INC
); }
344 : K_DDEC
'(' number delimiter number
')'
345 { set_dincdec
($3, $5, 1, TYPE_DEC
); }
346 | K_DDEC
'(' number delimiter number delimiter number
')'
347 { set_dincdec
($3, $5, $7, TYPE_DEC
); }
351 : number
{ set_byte
((uint8_t) $1); }
364 static void finalize_packet
(void)
366 /* XXX hack ... we allocated one packet pointer too much */
371 static void dump_conf
(void)
375 for
(i
= 0; i
< plen
; ++i
) {
376 printf
("[%zu] pkt\n", i
);
377 printf
(" len %zu cnts %zu rnds %zu\n",
383 for
(j
= 0; j
< packets
[i
].len
; ++j
)
384 printf
("%02x ", packets
[i
].payload
[j
]);
387 for
(j
= 0; j
< packet_dyn
[i
].clen
; ++j
)
388 printf
(" cnt%zu [%u,%u], inc %u, off %ld type %s\n", j
,
389 packet_dyn
[i
].cnt
[j
].min
,
390 packet_dyn
[i
].cnt
[j
].max
,
391 packet_dyn
[i
].cnt
[j
].inc
,
392 packet_dyn
[i
].cnt
[j
].off
,
393 packet_dyn
[i
].cnt
[j
].type
== TYPE_INC ?
396 for
(j
= 0; j
< packet_dyn
[i
].rlen
; ++j
)
397 printf
(" rnd%zu off %ld\n", j
,
398 packet_dyn
[i
].rnd
[j
].off
);
402 void cleanup_packets
(void)
406 for
(i
= 0; i
< plen
; ++i
) {
407 if
(packets
[i
].len
> 0)
408 xfree
(packets
[i
].payload
);
413 for
(i
= 0; i
< dlen
; ++i
) {
414 free
(packet_dyn
[i
].cnt
);
415 free
(packet_dyn
[i
].rnd
);
421 int compile_packets
(char *file
, int verbose
, int cpu
)
425 yyin
= fopen
(file
, "r");
427 panic
("Cannot open file!\n");
433 if
(our_cpu
== 0 && verbose
)
440 void yyerror(const char *err
)
442 panic
("Syntax error at line%d, at char '%s'! %s!\n", yylineno
, yytext
, err
);