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nfqws: rewrite default split pos logic

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bol-van
2024-11-13 13:28:43 +03:00
parent 14e9fc4d43
commit 611292281c
2 changed files with 11 additions and 8 deletions
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8
nfq/desync.c
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@@ -1129,17 +1129,10 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
fake_size = dp->fake_unknown_size;
break;
}
const struct proto_pos defpos={marker:PM_ABS,pos:2};
if (dp->desync_mode==DESYNC_MULTISPLIT || dp->desync_mode==DESYNC_MULTIDISORDER || dp->desync_mode2==DESYNC_MULTISPLIT || dp->desync_mode2==DESYNC_MULTIDISORDER)
{
split_pos=0;
ResolveMultiPos(rdata_payload, rlen_payload, l7proto, dp->splits, dp->split_count, multisplit_pos, &multisplit_count);
if (!multisplit_count)
{
multisplit_pos[multisplit_count] = ResolvePos(rdata_payload, rlen_payload, l7proto, &defpos);
if (!multisplit_pos[multisplit_count]) multisplit_pos[multisplit_count] = 1;
multisplit_count++;
}
if (params.debug)
{
if (multisplit_count)
@@ -1185,7 +1178,6 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
for(i=0,split_pos=0;i<dp->split_count && !split_pos;i++)
if (dp->splits[i].marker==PM_ABS)
split_pos = ResolvePos(rdata_payload, rlen_payload, l7proto, dp->splits+i);
if (!split_pos) split_pos = ResolvePos(rdata_payload, rlen_payload, l7proto, &defpos);
if (!split_pos) split_pos = 1;
DLOG("regular split pos: %zu\n",split_pos);
if (!split_pos || split_pos>rlen_payload) split_pos=1;