[netsniff-ng] [PATCH 5/6] trafgen: parser: Add 'pfc()' function for PFC header

[Vadim Kochan]

Add 'pfc()' function for PFC header creation with fields:

    code             - MAC Control opcode
    prio             - Priority enable vector
    prio(0)..prio(7) - Enable/disable pause for prio X
    time(0)..time(7) - Set pause time for prio X

Signed-off-by: Vadim Kochan <vadi...@gmail.com>
---
 trafgen_lexer.l  |  4 +++-
 trafgen_parser.y | 40 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/trafgen_lexer.l b/trafgen_lexer.l
index 324a171..025fbfe 100644
--- a/trafgen_lexer.l
+++ b/trafgen_lexer.l
@@ -118,8 +118,9 @@ ip6_addr    
(({a_hex}?:)?({a_hex}?:)?({a_hex}?:)?({a_hex}?:)?({a_hex}?:)?({a_hex}?:
 "etype"                { return K_ETYPE; }
 "type"         { return K_TYPE; }
 
-       /* IEEE 802.3X PAUSE */
+       /* PFC/IEEE 802.3X PAUSE */
 "time"         { return K_TIME; }
+"pri"|"prio"   { return K_PRIO; }
 
        /* VLAN (802.1Q & 802.1ad) */
 "tpid"         { return K_TPID; }
@@ -196,6 +197,7 @@ ip6_addr    
(({a_hex}?:)?({a_hex}?:)?({a_hex}?:)?({a_hex}?:)?({a_hex}?:)?({a_hex}?:
 
 "eth"          { return K_ETH; }
 "pause"         { return K_PAUSE; }
+"pfc"          { return K_PFC; }
 "vlan"         { return K_VLAN; }
 "mpls"         { return K_MPLS; }
 "arp"          { return K_ARP; }
diff --git a/trafgen_parser.y b/trafgen_parser.y
index 6526756..8ebf464 100644
--- a/trafgen_parser.y
+++ b/trafgen_parser.y
@@ -461,7 +461,7 @@ static void proto_field_expr_eval(void)
 %token K_CPU K_CSUMIP K_CSUMUDP K_CSUMTCP K_CSUMUDP6 K_CSUMTCP6 K_CONST8 
K_CONST16 K_CONST32 K_CONST64
 
 %token K_DADDR K_SADDR K_ETYPE K_TYPE
-%token K_TIME
+%token K_TIME K_PRIO
 %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_FLOW K_NEXT_HDR K_HOP_LIMIT
@@ -475,6 +475,7 @@ static void proto_field_expr_eval(void)
 
 %token K_ETH
 %token K_PAUSE
+%token K_PFC
 %token K_VLAN K_MPLS
 %token K_ARP
 %token K_IP4 K_IP6
@@ -702,6 +703,7 @@ ddec
 proto
        : eth_proto { }
        | pause_proto { }
+       | pfc_proto { }
        | vlan_proto { }
        | mpls_proto { }
        | arp_proto { }
@@ -806,6 +808,42 @@ pause_expr
                { proto_field_expr_eval(); }
        ;
 
+pfc_proto
+       : pfc '(' pfc_param_list ')' { }
+       ;
+
+pfc
+       : K_PFC { proto_add(PROTO_PFC); }
+       ;
+
+pfc_param_list
+       : { }
+       | pfc_expr { }
+       | pfc_expr delimiter pfc_param_list { }
+       ;
+
+pfc_field
+       : K_CODE { proto_field_set(PFC_OPCODE); }
+       | K_PRIO { proto_field_set(PFC_PRIO); }
+       | K_PRIO '(' number ')'
+               { if ($3 > 7) {
+                     yyerror("pfc: Invalid prio(index) parameter");
+                     panic("pfc: prio(0)..prio(7) is allowed only\n");
+                 }
+                 proto_field_set(PFC_PRIO_0 + $3); }
+       | K_TIME '(' number ')'
+               { if ($3 > 7) {
+                     yyerror("pfc: Invalid time(index) parameter");
+                     panic("pfc: time(0)..time(7) is allowed only\n");
+                 }
+                 proto_field_set(PFC_TIME_0 + $3); }
+       ;
+
+pfc_expr
+       : pfc_field skip_white '=' skip_white field_expr
+               { proto_field_expr_eval(); }
+       ;
+
 vlan_proto
        : vlan '(' vlan_param_list ')' { }
        ;
-- 
2.9.3

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