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zapret-lib,zapret-antidpi: support sni=%var in tls_mod

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bol-van
2025-12-07 15:08:56 +03:00
parent 2b5eb3cd2d
commit 3a153035e8
1 changed files with 24 additions and 12 deletions
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36
lua/zapret-lib.lua
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@@ -571,7 +571,31 @@ function dissect_nld(domain, level)
end
return nil
end
-- location is url compatible with Location: header
-- hostname is original hostname
function is_dpi_redirect(hostname, location)
local ds = dissect_url(location)
if ds.domain then
local sld1 = dissect_nld(hostname,2)
local sld2 = dissect_nld(ds.domain,2)
return sld2 and sld1~=sld2
end
return false
end
-- support sni=%var
function tls_mod_shim(desync, blob, modlist, payload)
local p1,p2 = string.find(modlist,"sni=%%[^,]+")
if p1 then
local var = string.sub(modlist,p1+5,p2)
local val = desync[var] or _G[var]
if not val then
error("tls_mod_shim: non-existent var '"..var.."'")
end
modlist = string.sub(modlist,1,p1+3)..val..string.sub(modlist,p2+1)
end
return tls_mod(blob,modlist,payload)
end
-- convert comma separated list of tcp flags to tcp.th_flags bit field
function parse_tcp_flags(s)
@@ -1316,15 +1340,3 @@ function ipfrag2(dis, ipfrag_options)
return {dis1,dis2}
end
-- location is url compatible with Location: header
-- hostname is original hostname
function is_dpi_redirect(hostname, location)
local ds = dissect_url(location)
if ds.domain then
local sld1 = dissect_nld(hostname,2)
local sld2 = dissect_nld(ds.domain,2)
return sld2 and sld1~=sld2
end
return false
end