From: Willy Tarreau <w@1wt.eu>
Date: Tue, 29 Sep 2026 14:19:07 +0000 (+0200)
Subject: MINOR: stick-table: provide a function to estimate on-wire data size
X-Git-Tag: v3.5-dev8~95
X-Git-Url: https://git.kaiwu.me/?a=commitdiff_plain;h=1e7260bc6948a57ac585b13d9ca8e57843a0f7f7;p=haproxy.git

MINOR: stick-table: provide a function to estimate on-wire data size

We'll need to estimate the on-wire size of the stored data as a majorant
to adjust key sizes, so let's provide a new function for this. It
considers all varint at their maximum size.
---

diff --git a/include/haproxy/stick_table.h b/include/haproxy/stick_table.h
index 37d85faf3..72bdc9558 100644
--- a/include/haproxy/stick_table.h
+++ b/include/haproxy/stick_table.h
@@ -141,6 +141,25 @@ static inline int stktable_type_size(int type)
 	return 0;
 }
 
+/* return upper protocol size for standard data type <type> when transported
+ * over the peers protocol.
+ */
+static inline int stktable_type_proto_size(int type)
+{
+	switch(type) {
+	case STD_T_SINT:
+	case STD_T_UINT:
+		return 5;  // 32-bit varint
+	case STD_T_ULL:
+		return 9;  // 64-bit varint
+	case STD_T_FRQP:
+		return 15; // 3*32-bit varint
+	case STD_T_DICT:
+		return 5;  // 32-bit varint
+	}
+	return 0;
+}
+
 int stktable_alloc_data_type(struct stktable *t, int type, const char *sa, const char *sa2);
 
 /* return pointer for data type <type> in sticky session <ts> of table <t>, all