[PATCH] src: proto: support DF, LE, VA for DSCP

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Add a couple of aliases for well-known DSCP values.

As per RFC 4594, add "df" as an alias of "cs0" with 0x00 value.

As per RFC 5865, add "va" for VOICE-ADMIT with 0x2c value.

As per RFC 8622, add "le" for Lower-Effort with 0x01 value.

tc-cake(8) in diffserv8 mode would benefit from having "le" alias since
it corresponds to "Tin 0".

Signed-off-by: Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>
---
 src/proto.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/proto.c b/src/proto.c
index a013a00d..84555b9e 100644
--- a/src/proto.c
+++ b/src/proto.c
@@ -684,7 +684,9 @@ static const struct symbol_table dscp_type_tbl = {
 		SYMBOL("cs5",	0x28),
 		SYMBOL("cs6",	0x30),
 		SYMBOL("cs7",	0x38),
+		SYMBOL("df",	0x00),
 		SYMBOL("be",	0x00),
+		SYMBOL("le",	0x01),
 		SYMBOL("af11",	0x0a),
 		SYMBOL("af12",	0x0c),
 		SYMBOL("af13",	0x0e),
@@ -697,6 +699,7 @@ static const struct symbol_table dscp_type_tbl = {
 		SYMBOL("af41",	0x22),
 		SYMBOL("af42",	0x24),
 		SYMBOL("af43",	0x26),
+		SYMBOL("va",	0x2c),
 		SYMBOL("ef",	0x2e),
 		SYMBOL_LIST_END
 	},
-- 
2.36.1




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