diff options
| author | Noriaki TAKAMIYA <takamiya@po.ntts.co.jp> | 2006-09-22 14:45:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 15:20:29 -0700 |
| commit | 3b9f9a1c3903b64c38505f9fed3bb11e48dbc931 (patch) | |
| tree | 0a508ef9ea7f9795d28333204c0a40c843b81e50 /net | |
| parent | 55ebaef1d5db9c1c76ba01a87fd986db5dee550d (diff) | |
[IPV6] ADDRCONF: Mobile IPv6 Home Address support.
IFA_F_HOMEADDRESS is introduced for Mobile IPv6 Home Addresses on
Mobile Node.
The IFA_F_HOMEADDRESS flag should be set for Mobile IPv6 Home
Addresses for 2 purposes. 1) We need to check this on receipt of
Type 2 Routing Header (RFC3775 Secion 6.4), 2) We prefer Home
Address(es) in source address selection (RFC3484 Section 5 Rule 4).
Signed-off-by: Noriaki TAKAMIYA <takamiya@po.ntts.co.jp>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index adb583a2615..c1867635239 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1038,9 +1038,27 @@ int ipv6_dev_get_saddr(struct net_device *daddr_dev, continue; } - /* Rule 4: Prefer home address -- not implemented yet */ + /* Rule 4: Prefer home address */ +#ifdef CONFIG_IPV6_MIP6 + if (hiscore.rule < 4) { + if (ifa_result->flags & IFA_F_HOMEADDRESS) + hiscore.attrs |= IPV6_SADDR_SCORE_HOA; + hiscore.rule++; + } + if (ifa->flags & IFA_F_HOMEADDRESS) { + score.attrs |= IPV6_SADDR_SCORE_HOA; + if (!(ifa_result->flags & IFA_F_HOMEADDRESS)) { + score.rule = 4; + goto record_it; + } + } else { + if (hiscore.attrs & IPV6_SADDR_SCORE_HOA) + continue; + } +#else if (hiscore.rule < 4) hiscore.rule++; +#endif /* Rule 5: Prefer outgoing interface */ if (hiscore.rule < 5) { @@ -2759,6 +2777,26 @@ void if6_proc_exit(void) } #endif /* CONFIG_PROC_FS */ +#ifdef CONFIG_IPV6_MIP6 +/* Check if address is a home address configured on any interface. */ +int ipv6_chk_home_addr(struct in6_addr *addr) +{ + int ret = 0; + struct inet6_ifaddr * ifp; + u8 hash = ipv6_addr_hash(addr); + read_lock_bh(&addrconf_hash_lock); + for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) { + if (ipv6_addr_cmp(&ifp->addr, addr) == 0 && + (ifp->flags & IFA_F_HOMEADDRESS)) { + ret = 1; + break; + } + } + read_unlock_bh(&addrconf_hash_lock); + return ret; +} +#endif + /* * Periodic address status verification */ @@ -2930,7 +2968,7 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, prefered_lft = 0x7FFFFFFF/HZ; spin_lock_bh(&ifp->lock); - ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD)) | ifa_flags; + ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; ifp->tstamp = jiffies; ifp->valid_lft = valid_lft; ifp->prefered_lft = prefered_lft; @@ -2981,7 +3019,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) return -ENODEV; /* We ignore other flags so far. */ - ifa_flags = ifm->ifa_flags & IFA_F_NODAD; + ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); ifa = ipv6_get_ifaddr(pfx, dev, 1); if (ifa == NULL) { |