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 <net/if_arp.h>
21 #include <netinet/in.h>
22 #include <linux/if_ether.h>
23 #include <linux/icmpv6.h>
26 #include "trafgen_parser.tab.h"
27 #include "trafgen_conf.h"
28 #include "trafgen_proto.h"
29 #include "trafgen_l2.h"
30 #include "trafgen_l3.h"
31 #include "trafgen_l4.h"
38 #define YYERROR_VERBOSE 0
40 #define YYENABLE_NLS 1
41 #define YYLTYPE_IS_TRIVIAL 1
45 extern
int yylex(void);
46 extern
void yy_scan_string
(char *);
47 extern
void yylex_destroy
();
48 extern
void yyerror(const char *);
52 extern
struct packet
*packets
;
55 #define packet_last (plen - 1)
57 #define payload_last (packets[packet_last].len - 1)
59 extern
struct packet_dyn
*packet_dyn
;
62 #define packetd_last (dlen - 1)
64 #define packetdc_last (packet_dyn[packetd_last].clen - 1)
65 #define packetdr_last (packet_dyn[packetd_last].rlen - 1)
66 #define packetds_last (packet_dyn[packetd_last].slen - 1)
68 static int our_cpu
, min_cpu
= -1, max_cpu
= -1;
70 static struct proto_hdr
*hdr
;
72 static inline
int test_ignore
(void)
74 if
(min_cpu
< 0 && max_cpu
< 0)
76 else if
(max_cpu
>= our_cpu
&& min_cpu
<= our_cpu
)
82 static inline
void __init_new_packet_slot
(struct packet
*slot
)
88 static inline
void __init_new_counter_slot
(struct packet_dyn
*slot
)
94 static inline
void __init_new_randomizer_slot
(struct packet_dyn
*slot
)
100 static inline
void __init_new_csum_slot
(struct packet_dyn
*slot
)
106 static inline
void __setup_new_counter
(struct counter
*c
, uint8_t start
,
107 uint8_t stop
, uint8_t stepping
,
113 c
->val
= (type
== TYPE_INC
) ? start
: stop
;
114 c
->off
= payload_last
;
118 static inline
void __setup_new_randomizer
(struct randomizer
*r
)
120 r
->off
= payload_last
;
123 static inline
void __setup_new_csum16
(struct csum16
*s
, off_t from
, off_t to
,
126 s
->off
= payload_last
- 1;
132 static void realloc_packet
(void)
138 packets
= xrealloc
(packets
, plen
* sizeof
(*packets
));
140 __init_new_packet_slot
(&packets
[packet_last
]);
143 packet_dyn
= xrealloc
(packet_dyn
, dlen
* sizeof
(*packet_dyn
));
145 __init_new_counter_slot
(&packet_dyn
[packetd_last
]);
146 __init_new_randomizer_slot
(&packet_dyn
[packetd_last
]);
147 __init_new_csum_slot
(&packet_dyn
[packetd_last
]);
150 struct packet
*current_packet
(void)
152 return
&packets
[packet_last
];
155 static void set_byte
(uint8_t val
)
157 struct packet
*pkt
= &packets
[packet_last
];
163 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
164 pkt
->payload
[payload_last
] = val
;
167 static void set_multi_byte
(uint8_t *s
, size_t len
)
171 for
(i
= 0; i
< len
; ++i
)
175 void set_fill
(uint8_t val
, size_t len
)
178 struct packet
*pkt
= &packets
[packet_last
];
184 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
185 for
(i
= 0; i
< len
; ++i
)
186 pkt
->payload
[payload_last
- i
] = val
;
189 static void __set_csum16_dynamic
(size_t from
, size_t to
, enum csum which
)
191 struct packet
*pkt
= &packets
[packet_last
];
192 struct packet_dyn
*pktd
= &packet_dyn
[packetd_last
];
195 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
198 pktd
->csum
= xrealloc
(pktd
->csum
, pktd
->slen
* sizeof
(struct csum16
));
200 __setup_new_csum16
(&pktd
->csum
[packetds_last
], from
, to
, which
);
203 static void __set_csum16_static
(size_t from
, size_t to
, enum csum which __maybe_unused
)
205 struct packet
*pkt
= &packets
[packet_last
];
209 sum
= htons
(calc_csum
(pkt
->payload
+ from
, to
- from
));
210 psum
= (uint8_t *) &sum
;
216 static inline
bool is_dynamic_csum
(enum csum which
)
229 static void set_csum16
(size_t from
, size_t to
, enum csum which
)
231 struct packet
*pkt
= &packets
[packet_last
];
232 struct packet_dyn
*pktd
= &packet_dyn
[packetd_last
];
244 bug_on
(!(from
< to
));
246 if
(packet_dyn_has_elems
(pktd
) || to
>= pkt
->len || is_dynamic_csum
(which
))
247 __set_csum16_dynamic
(from
, to
, which
);
249 __set_csum16_static
(from
, to
, which
);
252 static void set_rnd
(size_t len
)
255 struct packet
*pkt
= &packets
[packet_last
];
261 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
262 for
(i
= 0; i
< len
; ++i
)
263 pkt
->payload
[payload_last
- i
] = (uint8_t) rand
();
266 static void set_sequential_inc
(uint8_t start
, size_t len
, uint8_t stepping
)
269 struct packet
*pkt
= &packets
[packet_last
];
275 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
276 for
(i
= 0; i
< len
; ++i
) {
277 off_t off
= len
- 1 - i
;
279 pkt
->payload
[payload_last
- off
] = start
;
284 static void set_sequential_dec
(uint8_t start
, size_t len
, uint8_t stepping
)
287 struct packet
*pkt
= &packets
[packet_last
];
293 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
294 for
(i
= 0; i
< len
; ++i
) {
295 int off
= len
- 1 - i
;
297 pkt
->payload
[payload_last
- off
] = start
;
302 static void set_dynamic_rnd
(void)
304 struct packet
*pkt
= &packets
[packet_last
];
305 struct packet_dyn
*pktd
= &packet_dyn
[packetd_last
];
311 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
314 pktd
->rnd
= xrealloc
(pktd
->rnd
, pktd
->rlen
* sizeof
(struct randomizer
));
316 __setup_new_randomizer
(&pktd
->rnd
[packetdr_last
]);
319 static void set_dynamic_incdec
(uint8_t start
, uint8_t stop
, uint8_t stepping
,
322 struct packet
*pkt
= &packets
[packet_last
];
323 struct packet_dyn
*pktd
= &packet_dyn
[packetd_last
];
329 pkt
->payload
= xrealloc
(pkt
->payload
, pkt
->len
);
332 pktd
->cnt
= xrealloc
(pktd
->cnt
, pktd
->clen
* sizeof
(struct counter
));
334 __setup_new_counter
(&pktd
->cnt
[packetdc_last
], start
, stop
, stepping
, type
);
337 static void proto_add
(enum proto_id pid
)
339 hdr
= proto_header_init
(pid
);
345 struct in_addr ip4_addr
;
346 struct in6_addr ip6_addr
;
347 long long int number
;
352 %token K_COMMENT K_FILL K_RND K_SEQINC K_SEQDEC K_DRND K_DINC K_DDEC K_WHITE
353 %token K_CPU K_CSUMIP K_CSUMUDP K_CSUMTCP K_CSUMUDP6 K_CSUMTCP6 K_CONST8 K_CONST16 K_CONST32 K_CONST64
355 %token K_DADDR K_SADDR K_ETYPE K_TYPE
356 %token K_OPER K_SHA K_SPA K_THA K_TPA K_REQUEST K_REPLY K_PTYPE K_HTYPE
357 %token K_PROT K_TTL K_DSCP K_ECN K_TOS K_LEN K_ID K_FLAGS K_FRAG K_IHL K_VER K_CSUM K_DF K_MF
358 %token K_FLOW K_NEXT_HDR K_HOP_LIMIT
359 %token K_MTYPE K_CODE K_ECHO_REQUEST K_ECHO_REPLY
360 %token K_SPORT K_DPORT
361 %token K_SEQ K_ACK_SEQ K_DOFF K_CWR K_ECE K_URG K_ACK K_PSH K_RST K_SYN K_FIN K_WINDOW K_URG_PTR
362 %token K_TPID K_TCI K_PCP K_DEI K_1Q K_1AD
363 %token K_LABEL K_TC K_LAST K_EXP
372 %token
',' '{' '}' '(' ')' '[' ']' ':' '-' '+' '*' '/' '%' '&' '|' '<' '>' '^'
374 %token number
string mac ip4_addr ip6_addr
376 %type
<number
> number expression
379 %type
<ip4_addr
> ip4_addr
380 %type
<ip6_addr
> ip6_addr
382 %left
'-' '+' '*' '/' '%' '&' '|' '<' '>' '^'
389 | packets inline_comment
{ }
390 | packets K_WHITE
{ }
410 | delimiter_nowhite
{ }
418 : '{' noenforce_white payload noenforce_white
'}' {
419 min_cpu
= max_cpu
= -1;
421 proto_packet_finish
();
425 | K_CPU
'(' number cpu_delim number
')' ':' noenforce_white
'{' noenforce_white payload noenforce_white
'}' {
429 if
(min_cpu
> max_cpu
) {
436 proto_packet_finish
();
440 | K_CPU
'(' number
')' ':' noenforce_white
'{' noenforce_white payload noenforce_white
'}' {
441 min_cpu
= max_cpu
= $3;
443 proto_packet_finish
();
451 | payload elem_delimiter
{ }
455 : delimiter_nowhite
{ }
464 : number
{ set_byte
((uint8_t) $1); }
465 |
string { set_multi_byte
((uint8_t *) $1 + 1, strlen
($1) - 2); }
475 | proto
{ proto_header_finish
(hdr
); }
482 | expression
'+' expression
484 | expression
'-' expression
486 | expression
'*' expression
488 | expression
'/' expression
490 | expression
'%' expression
492 | expression
'&' expression
494 | expression
'|' expression
496 | expression
'^' expression
498 | expression
'<' '<' expression
500 | expression
'>' '>' expression
509 : K_FILL
'(' number delimiter number
')'
510 { set_fill
($3, $5); }
514 : K_CONST8
'(' expression
')'
515 { set_byte
((uint8_t) $3); }
516 | K_CONST16
'(' expression
')' {
517 uint16_t __c
= cpu_to_be16
((uint16_t) $3);
519 set_multi_byte
((uint8_t *) &__c
, sizeof
(__c
));
521 | K_CONST32
'(' expression
')' {
522 uint32_t __c
= cpu_to_be32
((uint32_t) $3);
524 set_multi_byte
((uint8_t *) &__c
, sizeof
(__c
));
526 | K_CONST64
'(' expression
')' {
527 uint64_t __c
= cpu_to_be64
((uint64_t) $3);
529 set_multi_byte
((uint8_t *) &__c
, sizeof
(__c
));
534 : K_RND
'(' number
')'
539 : K_CSUMIP
'(' number delimiter number
')'
540 { set_csum16
($3, $5, CSUM_IP
); }
541 | K_CSUMTCP
'(' number delimiter number
')'
542 { set_csum16
($3, $5, CSUM_TCP
); }
543 | K_CSUMUDP
'(' number delimiter number
')'
544 { set_csum16
($3, $5, CSUM_UDP
); }
545 | K_CSUMTCP6
'(' number delimiter number
')'
546 { set_csum16
($3, $5, CSUM_TCP6
); }
547 | K_CSUMUDP6
'(' number delimiter number
')'
548 { set_csum16
($3, $5, CSUM_UDP6
); }
552 : K_SEQINC
'(' number delimiter number
')'
553 { set_sequential_inc
($3, $5, 1); }
554 | K_SEQINC
'(' number delimiter number delimiter number
')'
555 { set_sequential_inc
($3, $5, $7); }
559 : K_SEQDEC
'(' number delimiter number
')'
560 { set_sequential_dec
($3, $5, 1); }
561 | K_SEQDEC
'(' number delimiter number delimiter number
')'
562 { set_sequential_dec
($3, $5, $7); }
567 { set_dynamic_rnd
(); }
568 | K_DRND
'(' number
')'
571 for
(i
= 0; i
< max
; ++i
)
577 : K_DINC
'(' number delimiter number
')'
578 { set_dynamic_incdec
($3, $5, 1, TYPE_INC
); }
579 | K_DINC
'(' number delimiter number delimiter number
')'
580 { set_dynamic_incdec
($3, $5, $7, TYPE_INC
); }
584 : K_DDEC
'(' number delimiter number
')'
585 { set_dynamic_incdec
($3, $5, 1, TYPE_DEC
); }
586 | K_DDEC
'(' number delimiter number delimiter number
')'
587 { set_dynamic_incdec
($3, $5, $7, TYPE_DEC
); }
603 : eth
'(' eth_param_list
')' { }
607 : K_ETH
{ proto_add
(PROTO_ETH
); }
613 | eth_field delimiter eth_param_list
{ }
623 : K_DADDR skip_white
'=' skip_white mac
624 { proto_field_set_bytes
(hdr
, ETH_DST_ADDR
, $5); }
625 | K_SADDR skip_white
'=' skip_white mac
626 { proto_field_set_bytes
(hdr
, ETH_SRC_ADDR
, $5); }
627 | eth_type skip_white
'=' skip_white number
628 { proto_field_set_be16
(hdr
, ETH_TYPE
, $5); }
632 : vlan
'(' vlan_param_list
')' { }
636 : K_VLAN
{ proto_add
(PROTO_VLAN
); }
642 | vlan_field delimiter vlan_param_list
{ }
651 : vlan_type skip_white
'=' skip_white number
652 { proto_field_set_be16
(hdr
, VLAN_TPID
, $5); }
654 { proto_field_set_be16
(hdr
, VLAN_TPID
, ETH_P_8021Q
); }
656 { proto_field_set_be16
(hdr
, VLAN_TPID
, ETH_P_8021AD
); }
657 | K_TCI skip_white
'=' skip_white number
658 { proto_field_set_be16
(hdr
, VLAN_TCI
, $5); }
659 | K_PCP skip_white
'=' skip_white number
660 { proto_field_set_be16
(hdr
, VLAN_PCP
, $5); }
661 | K_DEI skip_white
'=' skip_white number
662 { proto_field_set_be16
(hdr
, VLAN_DEI
, $5); }
663 | K_ID skip_white
'=' skip_white number
664 { proto_field_set_be16
(hdr
, VLAN_VID
, $5); }
668 : mpls
'(' mpls_param_list
')' { }
672 : K_MPLS
{ proto_add
(PROTO_MPLS
); }
678 | mpls_field delimiter mpls_param_list
{ }
687 : K_LABEL skip_white
'=' skip_white number
688 { proto_field_set_be32
(hdr
, MPLS_LABEL
, $5); }
689 | mpls_tc skip_white
'=' skip_white number
690 { proto_field_set_be32
(hdr
, MPLS_TC
, $5); }
691 | K_LAST skip_white
'=' skip_white number
692 { proto_field_set_be32
(hdr
, MPLS_LAST
, $5); }
693 | K_TTL skip_white
'=' skip_white number
694 { proto_field_set_be32
(hdr
, MPLS_TTL
, $5); }
698 : arp
'(' arp_param_list
')' { }
704 | arp_field delimiter arp_param_list
{ }
708 : K_OPER skip_white
'=' skip_white K_REQUEST
709 { proto_field_set_be16
(hdr
, ARP_OPER
, ARPOP_REQUEST
); }
710 | K_OPER skip_white
'=' skip_white K_REPLY
711 { proto_field_set_be16
(hdr
, ARP_OPER
, ARPOP_REPLY
); }
712 | K_OPER skip_white
'=' skip_white number
713 { proto_field_set_be16
(hdr
, ARP_OPER
, $5); }
715 { proto_field_set_be16
(hdr
, ARP_OPER
, ARPOP_REQUEST
); }
717 { proto_field_set_be16
(hdr
, ARP_OPER
, ARPOP_REPLY
); }
718 | K_HTYPE skip_white
'=' skip_white number
719 { proto_field_set_be16
(hdr
, ARP_HTYPE
, $5); }
720 | K_PTYPE skip_white
'=' skip_white number
721 { proto_field_set_be16
(hdr
, ARP_PTYPE
, $5); }
722 | K_SHA skip_white
'=' skip_white mac
723 { proto_field_set_bytes
(hdr
, ARP_SHA
, $5); }
724 | K_THA skip_white
'=' skip_white mac
725 { proto_field_set_bytes
(hdr
, ARP_THA
, $5); }
726 | K_SPA skip_white
'=' skip_white ip4_addr
727 { proto_field_set_u32
(hdr
, ARP_SPA
, $5.s_addr
); }
728 | K_TPA skip_white
'=' skip_white ip4_addr
729 { proto_field_set_u32
(hdr
, ARP_TPA
, $5.s_addr
); }
732 : K_ARP
{ proto_add
(PROTO_ARP
); }
736 : ip4
'(' ip4_param_list
')' { }
742 | ip4_field delimiter ip4_param_list
{ }
746 : K_VER skip_white
'=' skip_white number
747 { proto_field_set_u8
(hdr
, IP4_VER
, $5); }
748 | K_IHL skip_white
'=' skip_white number
749 { proto_field_set_u8
(hdr
, IP4_IHL
, $5); }
750 | K_DADDR skip_white
'=' skip_white ip4_addr
751 { proto_field_set_u32
(hdr
, IP4_DADDR
, $5.s_addr
); }
752 | K_SADDR skip_white
'=' skip_white ip4_addr
753 { proto_field_set_u32
(hdr
, IP4_SADDR
, $5.s_addr
); }
754 | K_PROT skip_white
'=' skip_white number
755 { proto_field_set_u8
(hdr
, IP4_PROTO
, $5); }
756 | K_TTL skip_white
'=' skip_white number
757 { proto_field_set_u8
(hdr
, IP4_TTL
, $5); }
758 | K_DSCP skip_white
'=' skip_white number
759 { proto_field_set_u8
(hdr
, IP4_DSCP
, $5); }
760 | K_ECN skip_white
'=' skip_white number
761 { proto_field_set_u8
(hdr
, IP4_ECN
, $5); }
762 | K_TOS skip_white
'=' skip_white number
763 { proto_field_set_u8
(hdr
, IP4_TOS
, $5); }
764 | K_LEN skip_white
'=' skip_white number
765 { proto_field_set_be16
(hdr
, IP4_LEN
, $5); }
766 | K_ID skip_white
'=' skip_white number
767 { proto_field_set_be16
(hdr
, IP4_ID
, $5); }
768 | K_FLAGS skip_white
'=' skip_white number
769 { proto_field_set_be16
(hdr
, IP4_FLAGS
, $5); }
770 | K_DF
{ proto_field_set_be16
(hdr
, IP4_DF
, 1); }
771 | K_MF
{ proto_field_set_be16
(hdr
, IP4_MF
, 1); }
772 | K_FRAG skip_white
'=' skip_white number
773 { proto_field_set_be16
(hdr
, IP4_FRAG_OFFS
, $5); }
774 | K_CSUM skip_white
'=' skip_white number
775 { proto_field_set_be16
(hdr
, IP4_CSUM
, $5); }
779 : K_IP4
{ proto_add
(PROTO_IP4
); }
783 : ip6
'(' ip6_param_list
')' { }
789 | ip6_field delimiter ip6_param_list
{ }
798 : K_VER skip_white
'=' skip_white number
799 { proto_field_set_be32
(hdr
, IP6_VER
, $5); }
800 | K_TC skip_white
'=' skip_white number
801 { proto_field_set_be32
(hdr
, IP6_CLASS
, $5); }
802 | K_FLOW skip_white
'=' skip_white number
803 { proto_field_set_be32
(hdr
, IP6_FLOW_LBL
, $5); }
804 | K_LEN skip_white
'=' skip_white number
805 { proto_field_set_be16
(hdr
, IP6_LEN
, $5); }
806 | K_NEXT_HDR skip_white
'=' skip_white number
807 { proto_field_set_u8
(hdr
, IP6_NEXT_HDR
, $5); }
808 | ip6_hop_limit skip_white
'=' skip_white number
809 { proto_field_set_u8
(hdr
, IP6_HOP_LIMIT
, $5); }
810 | K_SADDR skip_white
'=' skip_white ip6_addr
811 { proto_field_set_bytes
(hdr
, IP6_SADDR
, (uint8_t *)&($5.s6_addr
)); }
812 | K_DADDR skip_white
'=' skip_white ip6_addr
813 { proto_field_set_bytes
(hdr
, IP6_DADDR
, (uint8_t *)&($5.s6_addr
)); }
817 : K_IP6
{ proto_add
(PROTO_IP6
); }
821 : icmp6
'(' icmp6_param_list
')' { }
826 | icmp6_field delimiter icmp6_param_list
{ }
830 : K_MTYPE skip_white
'=' skip_white number
831 { proto_field_set_u8
(hdr
, ICMPV6_TYPE
, $5); }
832 | K_MTYPE skip_white
'=' K_ECHO_REQUEST
833 { proto_field_set_u8
(hdr
, ICMPV6_TYPE
, ICMPV6_ECHO_REQUEST
); }
835 { proto_field_set_u8
(hdr
, ICMPV6_TYPE
, ICMPV6_ECHO_REQUEST
); }
836 | K_MTYPE skip_white
'=' K_ECHO_REPLY
837 { proto_field_set_u8
(hdr
, ICMPV6_TYPE
, ICMPV6_ECHO_REPLY
); }
839 { proto_field_set_u8
(hdr
, ICMPV6_TYPE
, ICMPV6_ECHO_REPLY
); }
840 | K_CODE skip_white
'=' skip_white number
841 { proto_field_set_u8
(hdr
, ICMPV6_CODE
, $5); }
842 | K_CSUM skip_white
'=' skip_white number
843 { proto_field_set_be16
(hdr
, ICMPV6_CSUM
, $5); }
847 : K_ICMP6
{ proto_add
(PROTO_ICMP6
); }
851 : udp
'(' udp_param_list
')' { }
857 | udp_field delimiter udp_param_list
{ }
861 : K_SPORT skip_white
'=' skip_white number
862 { proto_field_set_be16
(hdr
, UDP_SPORT
, $5); }
863 | K_DPORT skip_white
'=' skip_white number
864 { proto_field_set_be16
(hdr
, UDP_DPORT
, $5); }
865 | K_LEN skip_white
'=' skip_white number
866 { proto_field_set_be16
(hdr
, UDP_LEN
, $5); }
867 | K_CSUM skip_white
'=' skip_white number
868 { proto_field_set_be16
(hdr
, UDP_CSUM
, $5); }
872 : K_UDP
{ proto_add
(PROTO_UDP
); }
876 : tcp
'(' tcp_param_list
')' { }
882 | tcp_field delimiter tcp_param_list
{ }
886 : K_SPORT skip_white
'=' skip_white number
887 { proto_field_set_be16
(hdr
, TCP_SPORT
, $5); }
888 | K_DPORT skip_white
'=' skip_white number
889 { proto_field_set_be16
(hdr
, TCP_DPORT
, $5); }
890 | K_SEQ skip_white
'=' skip_white number
891 { proto_field_set_be32
(hdr
, TCP_SEQ
, $5); }
892 | K_ACK_SEQ skip_white
'=' skip_white number
893 { proto_field_set_be32
(hdr
, TCP_ACK_SEQ
, $5); }
894 | K_DOFF skip_white
'=' skip_white number
895 { proto_field_set_be16
(hdr
, TCP_DOFF
, $5); }
896 | K_CWR
{ proto_field_set_be16
(hdr
, TCP_CWR
, 1); }
897 | K_ECE
{ proto_field_set_be16
(hdr
, TCP_ECE
, 1); }
898 | K_URG
{ proto_field_set_be16
(hdr
, TCP_URG
, 1); }
899 | K_ACK
{ proto_field_set_be16
(hdr
, TCP_ACK
, 1); }
900 | K_PSH
{ proto_field_set_be16
(hdr
, TCP_PSH
, 1); }
901 | K_RST
{ proto_field_set_be16
(hdr
, TCP_RST
, 1); }
902 | K_SYN
{ proto_field_set_be16
(hdr
, TCP_SYN
, 1); }
903 | K_FIN
{ proto_field_set_be16
(hdr
, TCP_FIN
, 1); }
904 | K_WINDOW skip_white
'=' skip_white number
905 { proto_field_set_be16
(hdr
, TCP_WINDOW
, $5); }
906 | K_CSUM skip_white
'=' skip_white number
907 { proto_field_set_be16
(hdr
, TCP_CSUM
, $5); }
908 | K_URG_PTR skip_white
'=' skip_white number
909 { proto_field_set_be16
(hdr
, TCP_URG_PTR
, $5); }
913 : K_TCP
{ proto_add
(PROTO_TCP
); }
918 static void finalize_packet
(void)
920 /* XXX hack ... we allocated one packet pointer too much */
925 static void dump_conf
(void)
929 for
(i
= 0; i
< plen
; ++i
) {
930 printf
("[%zu] pkt\n", i
);
931 printf
(" len %zu cnts %zu rnds %zu\n",
937 for
(j
= 0; j
< packets
[i
].len
; ++j
)
938 printf
("%02x ", packets
[i
].payload
[j
]);
941 for
(j
= 0; j
< packet_dyn
[i
].clen
; ++j
)
942 printf
(" cnt%zu [%u,%u], inc %u, off %jd type %s\n", j
,
943 packet_dyn
[i
].cnt
[j
].min
,
944 packet_dyn
[i
].cnt
[j
].max
,
945 packet_dyn
[i
].cnt
[j
].inc
,
946 (intmax_t)packet_dyn
[i
].cnt
[j
].off
,
947 packet_dyn
[i
].cnt
[j
].type
== TYPE_INC ?
950 for
(j
= 0; j
< packet_dyn
[i
].rlen
; ++j
)
951 printf
(" rnd%zu off %jd\n", j
,
952 (intmax_t)packet_dyn
[i
].rnd
[j
].off
);
956 void cleanup_packets
(void)
960 for
(i
= 0; i
< plen
; ++i
) {
961 if
(packets
[i
].len
> 0)
962 xfree
(packets
[i
].payload
);
967 for
(i
= 0; i
< dlen
; ++i
) {
968 free
(packet_dyn
[i
].cnt
);
969 free
(packet_dyn
[i
].rnd
);
975 void compile_packets
(char *file
, bool verbose
, unsigned int cpu
,
976 bool invoke_cpp
, char *const cpp_argv
[])
981 memset
(tmp_file
, 0, sizeof
(tmp_file
));
985 if
(cpp_exec
(file
, tmp_file
, sizeof
(tmp_file
), cpp_argv
)) {
986 fprintf
(stderr
, "Failed to invoke C preprocessor!\n");
992 if
(!strncmp
("-", file
, strlen
("-")))
995 yyin
= fopen
(file
, "r");
997 fprintf
(stderr
, "Cannot open %s: %s!\n", file
, strerror
(errno
));
1006 if
(our_cpu
== 0 && verbose
)
1011 if
(yyin
&& yyin
!= stdin
)
1020 void compile_packets_str
(char *str
, bool verbose
, unsigned int cpu
)
1027 yy_scan_string
(str
);
1032 if
(our_cpu
== 0 && verbose
)
1043 void yyerror(const char *err
)
1045 fprintf
(stderr
, "Syntax error at line %d, char '%s': %s\n", yylineno
, yytext
, err
);