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nfqws: apply split+seqovl only to the first reasm fragment

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bol-van 2025-01-19 11:58:31 +03:00
parent 29ab747e5b
commit e0e935c2ae
2 changed files with 3 additions and 2 deletions
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1
docs/changes.txt
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@ -447,3 +447,4 @@ v70
blockcheck: override all dialog questions and enable batch mode
blockcheck: parallel attempts
nfqws: weaken wireguard initiation recognition. use len=148 and data[0]=1 signature
nfqws: apply split+seqovl only to the first reasm fragment

4
nfq/desync.c
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@ -1327,7 +1327,7 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
// do seqovl only to the first packet
// otherwise it's prone to race condition on server side
// what happens first : server pushes socket buffer to process or another packet with seqovl arrives
seqovl = i==0 ? seqovl_pos : 0;
seqovl = (i==0 && reasm_offset==0) ? seqovl_pos : 0;
#ifdef __linux__
// only linux return error if MTU is exceeded
for(;;seqovl=0)
@ -1573,7 +1573,7 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
return verdict;
unsigned int seqovl = seqovl_pos;
unsigned int seqovl = reasm_offset ? 0 : seqovl_pos;
#ifdef __linux__
// only linux return error if MTU is exceeded
for(;;seqovl=0)