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nfqws: --dpi-desync-fakedsplit-mod=altorder

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bol-van
2025-09-23 14:06:23 +03:00
parent 528c27a01a
commit c467e696e3
4 changed files with 86 additions and 20 deletions
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45
nfq/desync.c
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@@ -2418,11 +2418,15 @@ send_orig_clean:
dp->desync_fooling_mode,dp->desync_ts_increment,dp->desync_badseq_increment,dp->desync_badseq_ack_increment,
pat, split_pos, fakeseg, &fakeseg_len))
goto send_orig;
ip_id=IP4_IP_ID_NEXT(ip_id);
DLOG("sending fake(1) 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos);
hexdump_limited_dlog(pat,split_pos,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
goto send_orig;
if (dp->fs_mod.ordering==0)
{
ip_id=IP4_IP_ID_NEXT(ip_id);
DLOG("sending fake(1) 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos);
hexdump_limited_dlog(pat,split_pos,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
goto send_orig;
}
unsigned int seqovl = reasm_offset ? 0 : seqovl_pos;
#ifdef __linux__
@@ -2435,7 +2439,7 @@ send_orig_clean:
seg_len = split_pos+seqovl;
if (seg_len>sizeof(ovlseg))
{
DLOG("seqovl is too large");
DLOG("seqovl is too large\n");
goto send_orig;
}
fill_pattern(ovlseg,seqovl,dp->seqovl_pattern,sizeof(dp->seqovl_pattern));
@@ -2472,12 +2476,15 @@ send_orig_clean:
break;
}
#endif
if (dis->ip) ((struct ip*)fakeseg)->ip_id = ip_id;
ip_id=IP4_IP_ID_NEXT(ip_id);
DLOG("sending fake(2) 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos);
hexdump_limited_dlog(pat,split_pos,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
goto send_orig;
if (dp->fs_mod.ordering<=1)
{
if (dis->ip) ((struct ip*)fakeseg)->ip_id = ip_id;
ip_id=IP4_IP_ID_NEXT(ip_id);
DLOG("sending fake(2) 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos);
hexdump_limited_dlog(pat,split_pos,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
goto send_orig;
}
fakeseg_len = sizeof(fakeseg);
if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, false, 0, net32_add(dis->tcp->th_seq,split_pos), dis->tcp->th_ack, dis->tcp->th_win, scale_factor, timestamps,
@@ -2503,12 +2510,14 @@ send_orig_clean:
if (!rawsend((struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
goto send_orig;
if (dis->ip) ((struct ip*)fakeseg)->ip_id = ip_id;
DLOG("sending fake(2) 2nd tcp segment %zu-%zu len=%zu : ",split_pos,dis->len_payload-1, dis->len_payload-split_pos);
hexdump_limited_dlog(pat+split_pos,dis->len_payload-split_pos,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
goto send_orig;
if (dp->fs_mod.ordering<=2)
{
if (dis->ip) ((struct ip*)fakeseg)->ip_id = ip_id;
DLOG("sending fake(2) 2nd tcp segment %zu-%zu len=%zu : ",split_pos,dis->len_payload-1, dis->len_payload-split_pos);
hexdump_limited_dlog(pat+split_pos,dis->len_payload-split_pos,PKTDATA_MAXDUMP); DLOG("\n");
if (!rawsend_rep(dp->desync_repeats,(struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
goto send_orig;
}
return VERDICT_DROP;
}