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| author | MadCamel <madcamel@gmail.com> | 2010-04-04 13:48:37 -0400 |
|---|---|---|
| committer | MadCamel <madcamel@gmail.com> | 2010-04-04 13:48:37 -0400 |
| commit | 30728fa5dca858af79038878d597ffd24cb1fc26 (patch) | |
| tree | ed2c7e54c6b70128a9d57ac03b837b32996dc9ed /src/map/battle.c | |
| parent | 6d2fb0bf050c95a6ea1dbed09c7faef05b77253f (diff) | |
| download | tmwa-30728fa5dca858af79038878d597ffd24cb1fc26.tar.gz tmwa-30728fa5dca858af79038878d597ffd24cb1fc26.tar.bz2 tmwa-30728fa5dca858af79038878d597ffd24cb1fc26.tar.xz tmwa-30728fa5dca858af79038878d597ffd24cb1fc26.zip | |
Added packet rate limiter and flood prevention system.
The idea behind this is to keep abusive clients from flooding the
server. Everything from over-voracious auto pick-up to exploitation
of NPC vulnerabilities is mitigated by this. It will also eventually
reduce server traffic, load, and possibly lag.
Config options in battle_athena.conf:
packet_spam_flood (default 30)
packet_spam_threshold (default 2)
packet_spam_kick (default 1)
Each packet type has a specified allowed incoming rate in milliseconds,
if this rate is exceeded the packet is ignored. If over 'flood' overruns
in 'threshold' seconds are detected, a flood is logged and a kick may be
triggered depending on the 'kick' config boolean.
The packet rates and flood thresholds have been tested and tweaked
on a live server, this should only affect abusive clients. Only
extremely abusive clients will trigger a log/kick condition.
This probably obsoletes the trade and kick spam code.
Diffstat (limited to 'src/map/battle.c')
| -rw-r--r-- | src/map/battle.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/src/map/battle.c b/src/map/battle.c index 579ea55..1cee690 100644 --- a/src/map/battle.c +++ b/src/map/battle.c @@ -5662,6 +5662,11 @@ int battle_config_read (const char *cfgName) battle_config.sit_spam_flood = 15; battle_config.sit_spam_ban = 0; battle_config.sit_spam_warn = 3; + + battle_config.packet_spam_threshold = 2; + battle_config.packet_spam_flood = 30; + battle_config.packet_spam_kick = 1; + } fp = fopen_ (cfgName, "r"); @@ -6122,7 +6127,13 @@ int battle_config_read (const char *cfgName) { "sit_spam_ban", &battle_config.sit_spam_ban}, { - "sit_spam_warn", &battle_config.sit_spam_warn} + "sit_spam_warn", &battle_config.sit_spam_warn}, + { + "packet_spam_threshold", &battle_config.packet_spam_threshold}, + { + "packet_spam_flood", &battle_config.packet_spam_flood}, + { + "packet_spam_kick", &battle_config.packet_spam_kick} }; if (line[0] == '/' && line[1] == '/') @@ -6304,6 +6315,21 @@ int battle_config_read (const char *cfgName) else if (battle_config.sit_spam_threshold > 32767) battle_config.sit_spam_threshold = 32767; + if (battle_config.packet_spam_threshold < 0) + battle_config.packet_spam_threshold = 0; + else if (battle_config.packet_spam_threshold > 32767) + battle_config.packet_spam_threshold = 32767; + + if (battle_config.packet_spam_flood < 0) + battle_config.packet_spam_flood = 0; + else if (battle_config.packet_spam_flood > 32767) + battle_config.packet_spam_flood = 32767; + + if (battle_config.packet_spam_kick < 0) + battle_config.packet_spam_kick = 0; + else if (battle_config.packet_spam_kick > 1) + battle_config.packet_spam_kick = 1; + // at least 1 client must be accepted if ((battle_config.packet_ver_flag & 63) == 0) // added by [Yor] battle_config.packet_ver_flag = 63; // accept all clients |