From 372c6748ca58bfc4d59b5d4caae290d9c19729ef Mon Sep 17 00:00:00 2001
From: bol-van <none@none.none>
Date: Thu, 15 Jan 2026 23:30:55 +0300
Subject: [PATCH] zapret-lib,antidpi: optimizations

---
 lua/zapret-antidpi.lua | 4 ++--
 lua/zapret-lib.lua     | 9 ++++++---
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lua/zapret-antidpi.lua b/lua/zapret-antidpi.lua
index 077391b..4e11345 100644
--- a/lua/zapret-antidpi.lua
+++ b/lua/zapret-antidpi.lua
@@ -1080,7 +1080,7 @@ function oob(ctx, desync)
 			local data = desync.reasm_data or desync.dis.payload
 			if not desync.arg.drop_ack and #data==0  then
 				DLOG("oob: sending empty ACK")
-				if not rawsend_dissect(desync.dis) then	return end
+				if not rawsend_dissect(desync.dis,rawsend_opts_base(desync)) then return end
 			end
 			if #data>0 then
 				local oob = desync.arg.char or (desync.arg.byte and bu8(desync.arg.byte) or nil) or "\x00"
@@ -1107,7 +1107,7 @@ function oob(ctx, desync)
 				dis_oob.payload = string.sub(data, 1, urp-1) .. oob .. string.sub(data, urp)
 				dis_oob.tcp.th_flags = bitor(dis_oob.tcp.th_flags, TH_URG)
 				DLOG("oob: sending OOB")
-				if not rawsend_dissect_segmented(desync, dis_oob, desync.tcp_mss, desync_opts(desync)) then
+				if not rawsend_dissect_segmented(desync, dis_oob) then
 					instance_cutoff_shim(ctx, desync)
 					return
 				end
diff --git a/lua/zapret-lib.lua b/lua/zapret-lib.lua
index 4cc70b4..748b875 100644
--- a/lua/zapret-lib.lua
+++ b/lua/zapret-lib.lua
@@ -1069,10 +1069,13 @@ end
 
 -- send dissect with tcp segmentation based on mss value. appply specified rawsend options.
 function rawsend_dissect_segmented(desync, dis, mss, options)
+	dis = dis or desync.dis
 	local discopy = deepcopy(dis)
+	options = options or desync_opts(desync)
 	apply_fooling(desync, discopy, options and options.fooling)
 
 	if dis.tcp then
+		mss = mss or desync.tcp_mss
 		local extra_len = l3l4_extra_len(discopy)
 		if extra_len >= mss then return false end
 		local max_data = mss - extra_len
@@ -1114,13 +1117,13 @@ end
 
 -- send specified payload based on existing L3/L4 headers in the dissect. add seq to tcp.th_seq.
 function rawsend_payload_segmented(desync, payload, seq, options)
-	options = options or desync_opts(desync)
-	local dis = deepcopy(desync.dis)
+	-- save some cpu and ram
+	local dis = (payload or seq and seq~=0) and deepcopy(desync.dis) or desync.dis
 	if payload then dis.payload = payload end
 	if dis.tcp and seq then
 		dis.tcp.th_seq = dis.tcp.th_seq + seq
 	end
-	return rawsend_dissect_segmented(desync, dis, desync.tcp_mss, options)
+	return rawsend_dissect_segmented(desync, dis, nil, options)
 end