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| author | Tobias Klauser <tklauser@distanz.ch> | 2016-02-01 15:56:10 +0100 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-02-01 16:22:24 +0100 |
| commit | f26175af848bfb3faaedd98b402949e8bd7ab8bc (patch) | |
| tree | 3901fb68dd629e08abc02b81349ff4cb6b26f213 /trafgen_parser.y | |
| parent | 0042946ef9e332e32af00a0fe0c6c7b6eec4b0e1 (diff) | |
trafgen: parser: Add TCP header generation function
Add a function 'tcp()' to generate TCP headers from the trafgen
configuration language.
Fields supported:
sp|sport TCP source port (default 0)
dp|dport TCP destination port (default 0)
seq Sequence number (default: 0)
aseq|ackseq Acknowledgement number (default 0)
doff|hlen Header length/data offset (default: 5)
cwr Congestion Window Reduced flag (default: 0)
ece|ecn ECN-Echo flag (default: 0)
urg Urgent flag (default: 0)
ack Acknowledgement flag (default: 0)
psh Push flag (default: 0)
rst Reset flag (default: 0)
syn Synchronize flag (default: 0)
fin Finish flag (default: 0)
win|window Receive window size (default: 0)
csum Checksum field (calculated automatically)
urgptr Urgent pointer (default: 0)
Example (SYN on port 80/http):
{ tcp(dport=80, syn, window=5840) }
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'trafgen_parser.y')
| -rw-r--r-- | trafgen_parser.y | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/trafgen_parser.y b/trafgen_parser.y index e512aed..7387c14 100644 --- a/trafgen_parser.y +++ b/trafgen_parser.y @@ -354,11 +354,12 @@ static void proto_add(enum proto_id pid) %token K_OPER K_SHA K_SPA K_THA K_TPA K_REQUEST K_REPLY K_PTYPE K_HTYPE %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 %token K_SPORT K_DPORT +%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 %token K_ETH %token K_ARP %token K_IP4 -%token K_UDP +%token K_UDP K_TCP %token ',' '{' '}' '(' ')' '[' ']' ':' '-' '+' '*' '/' '%' '&' '|' '<' '>' '^' @@ -582,6 +583,7 @@ proto | arp_proto { } | ip4_proto { } | udp_proto { } + | tcp_proto { } ; eth_proto @@ -717,6 +719,47 @@ udp : K_UDP { proto_add(PROTO_UDP); } ; +tcp_proto + : tcp '(' tcp_param_list ')' { } + ; + +tcp_param_list + : { } + | tcp_field { } + | tcp_field delimiter tcp_param_list { } + ; + +tcp_field + : K_SPORT skip_white '=' skip_white number + { proto_field_set_be16(hdr, TCP_SPORT, $5); } + | K_DPORT skip_white '=' skip_white number + { proto_field_set_be16(hdr, TCP_DPORT, $5); } + | K_SEQ skip_white '=' skip_white number + { proto_field_set_be32(hdr, TCP_SEQ, $5); } + | K_ACK_SEQ skip_white '=' skip_white number + { proto_field_set_be32(hdr, TCP_ACK_SEQ, $5); } + | K_DOFF skip_white '=' skip_white number + { proto_field_set_be16(hdr, TCP_DOFF, $5); } + | K_CWR { proto_field_set_be16(hdr, TCP_CWR, 1); } + | K_ECE { proto_field_set_be16(hdr, TCP_ECE, 1); } + | K_URG { proto_field_set_be16(hdr, TCP_URG, 1); } + | K_ACK { proto_field_set_be16(hdr, TCP_ACK, 1); } + | K_PSH { proto_field_set_be16(hdr, TCP_PSH, 1); } + | K_RST { proto_field_set_be16(hdr, TCP_RST, 1); } + | K_SYN { proto_field_set_be16(hdr, TCP_SYN, 1); } + | K_FIN { proto_field_set_be16(hdr, TCP_FIN, 1); } + | K_WINDOW skip_white '=' skip_white number + { proto_field_set_be16(hdr, TCP_WINDOW, $5); } + | K_CSUM skip_white '=' skip_white number + { proto_field_set_be16(hdr, TCP_CSUM, $5); } + | K_URG_PTR skip_white '=' skip_white number + { proto_field_set_be16(hdr, TCP_URG_PTR, $5); } + ; + +tcp + : K_TCP { proto_add(PROTO_TCP); } + ; + %% static void finalize_packet(void) |