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ipp2p: bittorrent commands

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After testing I decide to write my patch to bittorrent GET commands
from xt_ipp2p.c because old procedure is useless for modified and/or
private trackers.

BTW: info_hash may be 3rd argument, passkey (private trackers) may be
1st argument (or not) etc. so we need to search.
This commit is contained in:
Tomasz Tomkowiak
2010-01-26 06:16:00 +03:00
committed by Jan Engelhardt
parent 2ef714cc93
commit 43864ac6f1
2 changed files with 8 additions and 8 deletions
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1
doc/changelog.txt
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@@ -1,6 +1,7 @@
HEAD
====
- ipp2p: updated bittorent command recognition
Xtables-addons 1.23 (February 24 2010)

15
extensions/xt_ipp2p.c
View File

@@ -505,19 +505,18 @@ search_bittorrent(const unsigned char *payload, const unsigned int plen)
if (payload[0] == 0x13)
if (memcmp(payload + 1, "BitTorrent protocol", 19) == 0)
return IPP2P_BIT * 100;
/*
* get tracker commandos, all starts with GET /
* then it can follow: scrape| announce
* and then ?hash_info=
* Any tracker command starts with GET / then *may be* some file on web server
* (e.g. announce.php or dupa.pl or whatever.cgi or NOTHING for tracker on root dir)
* but *must have* one (or more) of strings listed below (true for scrape and announce)
*/
if (memcmp(payload, "GET /", 5) == 0) {
/* message scrape */
if (memcmp(payload + 5, "scrape?info_hash=", 17) == 0)
if (HX_memmem(payload, plen, "info_hash=", 9) != NULL)
return IPP2P_BIT * 100 + 1;
/* message announce */
if (memcmp(payload + 5, "announce?info_hash=", 19) == 0)
if (HX_memmem(payload, plen, "peer_id=", 8) != NULL)
return IPP2P_BIT * 100 + 2;
if (HX_memmem(payload, plen, "passkey=", 8) != NULL)
return IPP2P_BIT * 100 + 4;
}
} else {
/* bitcomet encryptes the first packet, so we have to detect another