Add syntax to specify IPv4 header fields:
{ ip(df, mf, frag=100, prot=0x1, ecn=2, dscp=20) }
Signed-off-by: Vadim Kochan <vadi...@gmail.com>
---
trafgen_lexer.l | 15 +++++++++++++++
trafgen_parser.y | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+)
diff --git a/trafgen_lexer.l b/trafgen_lexer.l
index 9bbd982..b9bcd10 100644
--- a/trafgen_lexer.l
+++ b/trafgen_lexer.l
@@ -117,8 +117,23 @@ ip_addr ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)
"resp"|"reply" { return F_RESP; }
"op" { return F_OPER; }
+"ihl" { return F_IHL; }
+"ver" { return F_VER; }
+"ttl" { return F_TTL; }
+"dscp" { return F_DSCP; }
+"ecn" { return F_ECN; }
+"tos" { return F_TOS; }
+"len" { return F_LEN; }
+"id" { return F_ID; }
+"flags" { return F_FLAGS; }
+"frag" { return F_FRAG; }
+"csum" { return F_CSUM; }
+"df" { return F_DF; }
+"mf" { return F_MF; }
+
"eth" { return P_ETH; }
"arp" { return P_ARP; }
+"ip" { return P_IP4; }
[ ]*"-"[ ]* { return '-'; }
[ ]*"+"[ ]* { return '+'; }
diff --git a/trafgen_parser.y b/trafgen_parser.y
index 185b4a8..e36babf 100644
--- a/trafgen_parser.y
+++ b/trafgen_parser.y
@@ -25,6 +25,7 @@
#include "trafgen_conf.h"
#include "trafgen_proto.h"
#include "trafgen_l2.h"
+#include "trafgen_l3.h"
#include "built_in.h"
#include "die.h"
#include "str.h"
@@ -350,9 +351,11 @@ static void proto_init(enum proto_id pid)
%token F_DADDR F_SADDR F_PROT
%token F_OPER F_SHA F_SPA F_THA F_TPA F_REQ F_RESP
+%token F_TTL F_DSCP F_ECN F_TOS F_LEN F_ID F_FLAGS F_FRAG F_IHL F_VER F_CSUM
F_DF F_MF
%token P_ETH
%token P_ARP
+%token P_IP4
%token ',' '{' '}' '(' ')' '[' ']' ':' '-' '+' '*' '/' '%' '&' '|' '<' '>' '^'
@@ -574,6 +577,7 @@ ddec
proto
: eth_proto { }
| arp_proto { }
+ | ip4_proto { }
;
eth_proto
@@ -627,6 +631,53 @@ arp
: P_ARP { proto_init(PROTO_ARP); }
;
+ip4_proto
+ : ip4 '(' ip4_param_list ')' { }
+ ;
+
+ip4_param_list
+ : { }
+ | ip4_field { }
+ | ip4_field delimiter ip4_param_list { }
+ ;
+
+ip4_field
+ : F_VER skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_VER, $5); }
+ | F_IHL skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_IHL, $5); }
+ | F_DADDR skip_white '=' skip_white ip_addr
+ { proto_field_set_u32(PROTO_IP4, IP4_DADDR, $5.s_addr); }
+ | F_SADDR skip_white '=' skip_white ip_addr
+ { proto_field_set_u32(PROTO_IP4, IP4_SADDR, $5.s_addr); }
+ | F_PROT skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_PROTO, $5); }
+ | F_TTL skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_TTL, $5); }
+ | F_DSCP skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_DSCP, $5); }
+ | F_ECN skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_ECN, $5); }
+ | F_TOS skip_white '=' skip_white number
+ { proto_field_set_u8(PROTO_IP4, IP4_TOS, $5); }
+ | F_LEN skip_white '=' skip_white number
+ { proto_field_set_be16(PROTO_IP4, IP4_LEN, $5); }
+ | F_ID skip_white '=' skip_white number
+ { proto_field_set_be16(PROTO_IP4, IP4_ID, $5); }
+ | F_FLAGS skip_white '=' skip_white number
+ { proto_field_set_be16(PROTO_IP4, IP4_FLAGS, $5); }
+ | F_DF { proto_field_set_be16(PROTO_IP4, IP4_DF, 1); }
+ | F_MF { proto_field_set_be16(PROTO_IP4, IP4_MF, 1); }
+ | F_FRAG skip_white '=' skip_white number
+ { proto_field_set_be16(PROTO_IP4, IP4_FRAG_OFFS, $5); }
+ | F_CSUM skip_white '=' skip_white number
+ { proto_field_set_be16(PROTO_IP4, IP4_CSUM, $5); }
+ ;
+
+ip4
+ : P_IP4 { proto_init(PROTO_IP4); }
+ ;
+
%%
static void finalize_packet(void)
--
2.6.3
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