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TARPIT: move XTTARPIT_RESET to its own function

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Moves XTTARPIT_RESET into its own function.

Signed-off-by: Josh Hunt <johunt@akamai.com>
This commit is contained in:
Josh Hunt
2012-07-08 11:11:22 -07:00
committed by Jan Engelhardt
parent a9f383daf8
commit 48fbc6783e
1 changed files with 11 additions and 6 deletions
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17
extensions/xt_TARPIT.c
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@@ -132,6 +132,16 @@ static bool xttarpit_honeypot(struct tcphdr *tcph, const struct tcphdr *oth,
return true; return true;
} }
static void xttarpit_reset(struct tcphdr *tcph, const struct tcphdr *oth)
{
tcph->window = 0;
tcph->ack = false;
tcph->syn = false;
tcph->rst = true;
tcph->seq = oth->ack_seq;
tcph->ack_seq = oth->seq;
}
static void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook, static void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook,
unsigned int mode) unsigned int mode)
{ {
@@ -205,12 +215,7 @@ static void tarpit_tcp(struct sk_buff *oldskb, unsigned int hook,
if (!xttarpit_honeypot(tcph, oth, payload)) if (!xttarpit_honeypot(tcph, oth, payload))
return; return;
} else if (mode == XTTARPIT_RESET) { } else if (mode == XTTARPIT_RESET) {
tcph->window = 0; xttarpit_reset(tcph, oth);
tcph->ack = false;
tcph->syn = false;
tcph->rst = true;
tcph->seq = oth->ack_seq;
tcph->ack_seq = oth->seq;
} }
/* Adjust TCP checksum */ /* Adjust TCP checksum */