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nfqws2: remove any arithmetics beyond 32 bit

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bol-van
2025-12-06 09:57:08 +03:00
parent 0dc29c9c35
commit 9cebc5cc37
2 changed files with 58 additions and 27 deletions
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8
lua/zapret-lib.lua
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@@ -668,10 +668,10 @@ function apply_fooling(desync, dis, fooling_options)
if not dis then dis = desync.dis end
if dis.tcp then
if tonumber(fooling_options.tcp_seq) then
dis.tcp.th_seq = dis.tcp.th_seq + fooling_options.tcp_seq
dis.tcp.th_seq = u32add(dis.tcp.th_seq, fooling_options.tcp_seq)
end
if tonumber(fooling_options.tcp_ack) then
dis.tcp.th_ack = dis.tcp.th_ack + fooling_options.tcp_ack
dis.tcp.th_ack = u32add(dis.tcp.th_ack, fooling_options.tcp_ack)
end
if fooling_options.tcp_flags_unset then
dis.tcp.th_flags = bitand(dis.tcp.th_flags, bitnot(parse_tcp_flags(fooling_options.tcp_flags_unset)))
@@ -682,7 +682,7 @@ function apply_fooling(desync, dis, fooling_options)
if tonumber(fooling_options.tcp_ts) then
local idx = find_tcp_option(dis.tcp.options,TCP_KIND_TS)
if idx and (dis.tcp.options[idx].data and #dis.tcp.options[idx].data or 0)==8 then
dis.tcp.options[idx].data = bu32(u32(dis.tcp.options[idx].data)+fooling_options.tcp_ts)..string.sub(dis.tcp.options[idx].data,5)
dis.tcp.options[idx].data = bu32(u32add(u32(dis.tcp.options[idx].data),fooling_options.tcp_ts))..string.sub(dis.tcp.options[idx].data,5)
else
DLOG("apply_fooling: timestamp tcp option not present or invalid")
end
@@ -1196,3 +1196,5 @@ function ipfrag2(dis, ipfrag_options)
return {dis1,dis2}
end
print(bitor(-4,-2))