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nfqws: --dpi-desync-fake-tcp-mod=seq

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bol-van
2025-09-23 10:50:51 +03:00
parent 59bce0036b
commit e384f88931
4 changed files with 63 additions and 3 deletions
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8
nfq/desync.c
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@@ -1900,7 +1900,9 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
uint8_t *fake_data;
uint8_t fake_data_buf[FAKE_MAX_TCP];
int n=0;
uint32_t sequence, sequence0;
sequence = sequence0 = ntohl(dis->tcp->th_seq);
ip_id = IP4_IP_ID_FIX(dis->ip);
LIST_FOREACH(fake_item, fake, next)
@@ -1919,7 +1921,7 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
fake_data = fake_item->data;
}
pkt1_len = sizeof(pkt1);
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, false, 0, dis->tcp->th_seq, dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, false, 0, htonl(sequence), dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
DF,ttl_fake,IP4_TOS(dis->ip),ip_id,IP6_FLOW(dis->ip6),
dp->desync_fooling_mode,dp->desync_ts_increment,dp->desync_badseq_increment,dp->desync_badseq_ack_increment,
fake_data, fake_item->size, pkt1, &pkt1_len))
@@ -1927,7 +1929,8 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
reasm_orig_cancel(ctrack);
goto send_orig;
}
DLOG("sending fake[%d] : ", n);
DLOG("sending fake[%d] seq=+%u : ", n, sequence-sequence0);
hexdump_limited_dlog(fake_data,fake_item->size,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
{
@@ -1935,6 +1938,7 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
goto send_orig;
}
ip_id=IP4_IP_ID_NEXT(ip_id);
if (dp->tcp_mod.seq) sequence += fake_item->size;
}
}
bFake = true;