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Improve previous PT_TEXTCMD/PT_TEXTCMD2 check, add another one to ignore zero size textcmds!

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This commit is contained in:
Monster Iestyn 2017-05-23 17:35:32 +01:00
parent 0b0b738a6f
commit 7147e0fcaf
1 changed files with 16 additions and 4 deletions
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20
src/d_clisrv.c
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@ -3736,11 +3736,23 @@ FILESTAMP
tic_t tic = maketic; tic_t tic = maketic;
UINT8 *textcmd; UINT8 *textcmd;
// ignore if the textcmd size var is actually larger than it should be // ignore if the textcmd has a reported size of zero
if (BASEPACKETSIZE + netbuffer->u.textcmd[0] > (size_t)doomcom->datalength) // this shouldn't be sent at all
if (!netbuffer->u.textcmd[0])
{ {
DEBFILE(va("GetPacket: Bad Textcmd packet size! (expected %d, actual %d)\n", DEBFILE(va("GetPacket: Textcmd with size 0 detected! (node %u, player %d)\n",
BASEPACKETSIZE + netbuffer->u.textcmd[0], doomcom->datalength)); node, netconsole));
Net_UnAcknowledgePacket(node);
break;
}
// ignore if the textcmd size var is actually larger than it should be
// BASEPACKETSIZE + 1 (for size) + textcmd[0] should == datalength
if (netbuffer->u.textcmd[0] > (size_t)doomcom->datalength-BASEPACKETSIZE-1)
{
DEBFILE(va("GetPacket: Bad Textcmd packet size! (expected %d, actual %d, node %u, player %d)\n",
netbuffer->u.textcmd[0], (size_t)doomcom->datalength-BASEPACKETSIZE-1,
node, netconsole));
Net_UnAcknowledgePacket(node); Net_UnAcknowledgePacket(node);
break; break;
} }