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nfqws: do not allow increasing scale factor

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bol-van 2021-03-12 15:44:25 +03:00
parent bdf4c30973
commit 199bf7c9b0
1 changed files with 9 additions and 3 deletions
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12
nfq/darkmagic.c
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@ -669,9 +669,15 @@ void tcp_rewrite_wscale(struct tcphdr *tcp, uint8_t scale_factor)
if (scale && scale[1]==3) // length should be 3 if (scale && scale[1]==3) // length should be 3
{ {
scale_factor_old=scale[2]; scale_factor_old=scale[2];
scale[2]=scale_factor; // do not allow increasing scale factor
if (scale_factor_old!=scale_factor) if (scale_factor>=scale_factor_old)
DLOG("Scale factor change %u => %u\n", scale_factor_old, scale_factor) DLOG("Scale factor %u unchanged\n", scale_factor_old)
else
{
scale[2]=scale_factor;
if (scale_factor_old!=scale_factor)
DLOG("Scale factor change %u => %u\n", scale_factor_old, scale_factor)
}
} }
} }
} }