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Commit ce556b3a authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
Browse files

[NETFILTER]: xt_tcpmss: minor cleanups 



- remove unused define
- remove useless wrapper function
- use new line for expression after condition

Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5fa2a760

net/netfilter/xt_tcpmss.c

+18 −30
Original line number Original line Diff line number Diff line
@@ -18,21 +18,22 @@ 
#include <linux/netfilter_ipv4/ip_tables.h>

#include <linux/netfilter_ipv4/ip_tables.h>

#include <linux/netfilter_ipv6/ip6_tables.h>

#include <linux/netfilter_ipv6/ip6_tables.h>





#define TH_SYN 0x02



MODULE_LICENSE("GPL");

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");

MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");

MODULE_DESCRIPTION("iptables TCP MSS match module");

MODULE_DESCRIPTION("iptables TCP MSS match module");

MODULE_ALIAS("ipt_tcpmss");

MODULE_ALIAS("ipt_tcpmss");





/* Returns 1 if the mss option is set and matched by the range, 0 otherwise */

static int

static inline int

match(const struct sk_buff *skb,

mssoption_match(u_int16_t min, u_int16_t max,

      const struct net_device *in,

		const struct sk_buff *skb,

      const struct net_device *out,

      const struct xt_match *match,

      const void *matchinfo,

      int offset,

      unsigned int protoff,

      unsigned int protoff,

		int invert,

      int *hotdrop)

      int *hotdrop)

{

{

	const struct xt_tcpmss_match_info *info = matchinfo;

	struct tcphdr _tcph, *th;

	struct tcphdr _tcph, *th;

	/* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */

	/* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */

	u8 _opt[15 * 4 - sizeof(_tcph)], *op;

	u8 _opt[15 * 4 - sizeof(_tcph)], *op;
@@ -64,35 +65,22 @@ mssoption_match(u_int16_t min, u_int16_t max, 




			mssval = (op[i+2] << 8) | op[i+3];

			mssval = (op[i+2] << 8) | op[i+3];

			

			

			return (mssval >= min && mssval <= max) ^ invert;

			return (mssval >= info->mss_min &&

			        mssval <= info->mss_max) ^ info->invert;

		}

		}

		if (op[i] < 2) i++;

		if (op[i] < 2)

		else i += op[i+1]?:1;

			i++;

		else

			i += op[i+1] ? : 1;

	}

	}

out:

out:

	return invert;

	return info->invert;





dropit:

dropit:

	*hotdrop = 1;

	*hotdrop = 1;

	return 0;

	return 0;

}

}





static int

match(const struct sk_buff *skb,

      const struct net_device *in,

      const struct net_device *out,

      const struct xt_match *match,

      const void *matchinfo,

      int offset,

      unsigned int protoff,

      int *hotdrop)

{

	const struct xt_tcpmss_match_info *info = matchinfo;



	return mssoption_match(info->mss_min, info->mss_max, skb, protoff,

			       info->invert, hotdrop);

}



static struct xt_match xt_tcpmss_match[] = {

static struct xt_match xt_tcpmss_match[] = {

	{

	{

		.name		= "tcpmss",

		.name		= "tcpmss",