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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2006-08-25 16:05:43 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 15:18:08 -0700
commitcd9d742622fbc2190221e0b2aca80596bfd17733 (patch)
tree4734f16bf89a5e7c24427058e494a5815ec6fca6 /net/ipv6
parent2613aad5ab28579687519918cdc353af0eed5a3f (diff)
[IPV6] ROUTE: Add support for fwmask in routing rules.
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>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/fib6_rules.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 3d64c71f52d..ee4aa43ad97 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -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;