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[DECNET]: Add support for fwmark masks in routing rules

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

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Steven Whitehouse <steve@chygwyn.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-08-25 16:11:08 -07:00 committed by David S. Miller
parent bbfb39cbf6
commit 88e91f2903
1 changed files with 18 additions and 2 deletions
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20
net/decnet/dn_rules.c
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@ -47,6 +47,7 @@ struct dn_fib_rule
u8 flags;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
u32 fwmark;
u32 fwmask;
#endif
};
@ -116,6 +117,7 @@ static struct nla_policy dn_fib_rule_policy[FRA_MAX+1] __read_mostly = {
[FRA_SRC] = { .type = NLA_U16 },
[FRA_DST] = { .type = NLA_U16 },
[FRA_FWMARK] = { .type = NLA_U32 },
[FRA_FWMASK] = { .type = NLA_U32 },
[FRA_TABLE] = { .type = NLA_U32 },
};
@ -130,7 +132,7 @@ static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
return 0;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (r->fwmark && (r->fwmark != fl->fld_fwmark))
if ((r->fwmark ^ fl->fld_fwmark) & r->fwmask)
return 0;
#endif
@ -168,8 +170,17 @@ static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
r->dst = nla_get_u16(tb[FRA_DST]);
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (tb[FRA_FWMARK])
if (tb[FRA_FWMARK]) {
r->fwmark = nla_get_u32(tb[FRA_FWMARK]);
if (r->fwmark)
/* compatibility: if the mark value is non-zero all bits
* are compared unless a mask is explicitly specified.
*/
r->fwmask = 0xFFFFFFFF;
}
if (tb[FRA_FWMASK])
r->fwmask = nla_get_u32(tb[FRA_FWMASK]);
#endif
r->src_len = frh->src_len;
@ -195,6 +206,9 @@ static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (tb[FRA_FWMARK] && (r->fwmark != nla_get_u32(tb[FRA_FWMARK])))
return 0;
if (tb[FRA_FWMASK] && (r->fwmask != nla_get_u32(tb[FRA_FWMASK])))
return 0;
#endif
if (tb[FRA_SRC] && (r->src != nla_get_u16(tb[FRA_SRC])))
@ -237,6 +251,8 @@ static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (r->fwmark)
NLA_PUT_U32(skb, FRA_FWMARK, r->fwmark);
if (r->fwmask || r->fwmark)
NLA_PUT_U32(skb, FRA_FWMASK, r->fwmask);
#endif
if (r->dst_len)
NLA_PUT_U16(skb, FRA_DST, r->dst);