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zapret-antidpi: oob

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bol-van
2026-01-15 20:02:53 +03:00
parent 93d81ca4b2
commit 67a8ee47e3
3 changed files with 103 additions and 2 deletions
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12
lua/zapret-lib.lua
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@@ -310,6 +310,7 @@ function pos_str(desync, pos)
return pos.mode..pos_get(desync, pos.mode)
end
-- convert array a to packed string using 'packer' function. only numeric indexes starting from 1, order preserved
function barray(a, packer)
if a then
@@ -1075,6 +1076,8 @@ function rawsend_dissect_segmented(desync, dis, mss, options)
local extra_len = l3l4_extra_len(discopy)
if extra_len >= mss then return false end
local max_data = mss - extra_len
local urp = dis.tcp.th_urp
local oob = bitand(dis.tcp.th_flags, TH_URG)~=0
if #discopy.payload > max_data then
local pos=1
local len
@@ -1083,6 +1086,15 @@ function rawsend_dissect_segmented(desync, dis, mss, options)
while pos <= #payload do
len = #payload - pos + 1
if len > max_data then len = max_data end
if oob then
if urp>=pos and urp<(pos+len)then
discopy.tcp.th_flags = bitor(dis.tcp.th_flags, TH_URG)
discopy.tcp.th_urp = urp-pos+1
else
discopy.tcp.th_flags = bitand(dis.tcp.th_flags, bitnot(TH_URG))
discopy.tcp.th_urp = 0
end
end
discopy.payload = string.sub(payload,pos,pos+len-1)
apply_ip_id(desync, discopy, options and options.ipid)
if not rawsend_dissect_ipfrag(discopy, options) then