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[IPV6]: Support Source Address Selection API (RFC5014).

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki
2008-03-25 09:37:42 +09:00
parent 1d5d236d30
commit 7cbca67c07
12 changed files with 146 additions and 13 deletions
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17
net/ipv6/addrconf.c
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@@ -909,6 +909,7 @@ struct ipv6_saddr_dst {
int ifindex;
int scope;
int label;
unsigned int prefs;
};
static inline int ipv6_saddr_preferred(int type)
@@ -984,9 +985,12 @@ static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score,
break;
#ifdef CONFIG_IPV6_MIP6
case IPV6_SADDR_RULE_HOA:
{
/* Rule 4: Prefer home address */
ret = !!(score->ifa->flags & IFA_F_HOMEADDRESS);
int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
break;
}
#endif
case IPV6_SADDR_RULE_OIF:
/* Rule 5: Prefer outgoing interface */
@@ -1000,11 +1004,16 @@ static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score,
break;
#ifdef CONFIG_IPV6_PRIVACY
case IPV6_SADDR_RULE_PRIVACY:
{
/* Rule 7: Prefer public address
* Note: prefer temprary address if use_tempaddr >= 2
*/
ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ (score->ifa->idev->cnf.use_tempaddr >= 2);
int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
!!(dst->prefs & IPV6_PREFER_SRC_TMP) :
score->ifa->idev->cnf.use_tempaddr >= 2;
ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
break;
}
#endif
case IPV6_SADDR_RULE_ORCHID:
/* Rule 8-: Prefer ORCHID vs ORCHID or
@@ -1030,7 +1039,8 @@ out:
}
int ipv6_dev_get_saddr(struct net_device *dst_dev,
struct in6_addr *daddr, struct in6_addr *saddr)
struct in6_addr *daddr, unsigned int prefs,
struct in6_addr *saddr)
{
struct ipv6_saddr_score scores[2],
*score = &scores[0], *hiscore = &scores[1];
@@ -1044,6 +1054,7 @@ int ipv6_dev_get_saddr(struct net_device *dst_dev,
dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
dst.scope = __ipv6_addr_src_scope(dst_type);
dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex);
dst.prefs = prefs;
hiscore->rule = -1;
hiscore->ifa = NULL;