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[IPV6] ROUTE: Add support for fwmask in routing rules.

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Add support for fwmark masks.
A mask of 0xFFFFFFFF is used when a mark value != 0 is sent without a mask.

Based on patch for net/ipv4/fib_rules.c by Patrick McHardy <kaber@trash.net>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-08-25 16:05:43 -07:00 committed by David S. Miller
parent 2613aad5ab
commit cd9d742622
1 changed files with 22 additions and 2 deletions
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24
net/ipv6/fib6_rules.c
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@ -28,6 +28,7 @@ struct fib6_rule
struct rt6key dst;
#ifdef CONFIG_IPV6_ROUTE_FWMARK
u32 fwmark;
u32 fwmask;
#endif
u8 tclass;
};
@ -128,7 +129,7 @@ static int fib6_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
return 0;
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (r->fwmark && (r->fwmark != fl->fl6_fwmark))
if ((r->fwmark ^ fl->fl6_fwmark) / r->fwmask)
return 0;
#endif
@ -141,6 +142,7 @@ static struct nla_policy fib6_rule_policy[FRA_MAX+1] __read_mostly = {
[FRA_SRC] = { .minlen = sizeof(struct in6_addr) },
[FRA_DST] = { .minlen = sizeof(struct in6_addr) },
[FRA_FWMARK] = { .type = NLA_U32 },
[FRA_FWMASK] = { .type = NLA_U32 },
[FRA_TABLE] = { .type = NLA_U32 },
};
@ -174,8 +176,20 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
sizeof(struct in6_addr));
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (tb[FRA_FWMARK])
if (tb[FRA_FWMARK]) {
rule6->fwmark = nla_get_u32(tb[FRA_FWMARK]);
if (rule6->fwmark) {
/*
* if the mark value is non-zero,
* all bits are compared by default
* unless a mask is explicitly specified.
*/
rule6->fwmask = 0xFFFFFFFF;
}
}
if (tb[FRA_FWMASK])
rule6->fwmask = nla_get_u32(tb[FRA_FWMASK]);
#endif
rule6->src.plen = frh->src_len;
@ -212,6 +226,9 @@ static int fib6_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (tb[FRA_FWMARK] && (rule6->fwmark != nla_get_u32(tb[FRA_FWMARK])))
return 0;
if (tb[FRA_FWMASK] && (rule6->fwmask != nla_get_u32(tb[FRA_FWMASK])))
return 0;
#endif
return 1;
@ -238,6 +255,9 @@ static int fib6_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (rule6->fwmark)
NLA_PUT_U32(skb, FRA_FWMARK, rule6->fwmark);
if (rule6->fwmask)
NLA_PUT_U32(skb, FRA_FWMASK, rule6->fwmask);
#endif
return 0;