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nfqws: --methodeol

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bol-van
2024-11-23 13:14:02 +03:00
parent a3048ae120
commit 9184317549
3 changed files with 160 additions and 130 deletions
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41
nfq/desync.c
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@@ -1082,7 +1082,7 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
}
ttl_fake = (ctrack_replay && ctrack_replay->autottl) ? ctrack_replay->autottl : (dis->ip6 ? (dp->desync_ttl6 ? dp->desync_ttl6 : ttl_orig) : (dp->desync_ttl ? dp->desync_ttl : ttl_orig));
if ((l7proto == HTTP) && (dp->hostcase || dp->hostnospace || dp->domcase) && HttpFindHost(&phost,dis->data_payload,dis->len_payload))
if ((l7proto == HTTP) && (dp->hostcase || dp->hostnospace || dp->domcase || dp->methodeol) && HttpFindHost(&phost,dis->data_payload,dis->len_payload))
{
if (dp->hostcase)
{
@@ -1098,23 +1098,38 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
verdict=VERDICT_MODIFY;
}
uint8_t *pua;
if (dp->hostnospace &&
(pua = (uint8_t*)memmem(dis->data_payload, dis->len_payload, "\r\nUser-Agent: ", 14)) &&
(pua = (uint8_t*)memmem(pua + 1, dis->len_payload - (pua - dis->data_payload) - 1, "\r\n", 2)))
if (dp->hostnospace)
{
DLOG("removing space after Host: and adding it to User-Agent:\n");
if (pua > phost)
if ((pua = (uint8_t*)memmem(dis->data_payload, dis->len_payload, "\r\nUser-Agent: ", 14)) &&
(pua = (uint8_t*)memmem(pua + 1, dis->len_payload - (pua - dis->data_payload) - 1, "\r\n", 2)))
{
memmove(phost + 5, phost + 6, pua - phost - 6);
pua[-1]=' ';
DLOG("removing space after Host: and adding it to User-Agent:\n");
if (pua > phost)
{
memmove(phost + 5, phost + 6, pua - phost - 6);
pua[-1]=' ';
}
else
{
memmove(pua + 1, pua, phost - pua + 5);
*pua = ' ';
}
verdict=VERDICT_MODIFY;
}
}
else if (dp->methodeol)
{
if (phost[5]==' ' || phost[5]=='\t')
{
DLOG("removing space after Host: and adding '\\n' before method\n");
memmove(dis->data_payload+1,dis->data_payload,phost-dis->data_payload+5);
dis->data_payload[0]='\n';
verdict=VERDICT_MODIFY;
}
else
{
memmove(pua + 1, pua, phost - pua + 5);
*pua = ' ';
}
verdict=VERDICT_MODIFY;
DLOG("cannot do methodeol because there's no space or tab after Host:\n");
}
}
if (dp->desync_mode==DESYNC_NONE)