Commit 2a8cc6c8 authored by YOSHIFUJI Hideaki's avatar YOSHIFUJI Hideaki Committed by David S. Miller

[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.

Policy table is implemented as an RCU linear list since we do not expect
large list nor frequent updates.
Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 303065a8
/*
* if_addrlabel.h - netlink interface for address labels
*
* Copyright (C)2007 USAGI/WIDE Project, All Rights Reserved.
*
* Authors:
* YOSHIFUJI Hideaki @ USAGI/WIDE <yoshfuji@linux-ipv6.org>
*/
#ifndef __LINUX_IF_ADDRLABEL_H
#define __LINUX_IF_ADDRLABEL_H
struct ifaddrlblmsg
{
__u8 ifal_family; /* Address family */
__u8 __ifal_reserved; /* Reserved */
__u8 ifal_prefixlen; /* Prefix length */
__u8 ifal_flags; /* Flags */
__u32 ifal_index; /* Link index */
__u32 ifal_seq; /* sequence number */
};
enum
{
IFAL_ADDRESS = 1,
IFAL_LABEL = 2,
__IFAL_MAX
};
#define IFAL_MAX (__IFAL_MAX - 1)
#endif
......@@ -100,6 +100,13 @@ enum {
RTM_NEWNDUSEROPT = 68,
#define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
RTM_NEWADDRLABEL = 72,
#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
RTM_DELADDRLABEL,
#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
RTM_GETADDRLABEL,
#define RTM_GETADDRLABEL RTM_GETADDRLABEL
__RTM_MAX,
#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
};
......
......@@ -83,6 +83,14 @@ extern void addrconf_join_solict(struct net_device *dev,
extern void addrconf_leave_solict(struct inet6_dev *idev,
struct in6_addr *addr);
/*
* IPv6 Address Label subsystem (addrlabel.c)
*/
extern int ipv6_addr_label_init(void);
extern void ipv6_addr_label_rtnl_register(void);
extern u32 ipv6_addr_label(const struct in6_addr *addr,
int type, int ifindex);
/*
* multicast prototypes (mcast.c)
*/
......
......@@ -5,6 +5,7 @@
obj-$(CONFIG_IPV6) += ipv6.o
ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
addrlabel.o \
route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o udplite.o \
raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
exthdrs.o sysctl_net_ipv6.o datagram.o \
......
......@@ -874,36 +874,6 @@ static inline int ipv6_saddr_preferred(int type)
return 0;
}
/* static matching label */
static inline int ipv6_addr_label(const struct in6_addr *addr, int type,
int ifindex)
{
/*
* prefix (longest match) label
* -----------------------------
* ::1/128 0
* ::/0 1
* 2002::/16 2
* ::/96 3
* ::ffff:0:0/96 4
* fc00::/7 5
* 2001::/32 6
*/
if (type & IPV6_ADDR_LOOPBACK)
return 0;
else if (type & IPV6_ADDR_COMPATv4)
return 3;
else if (type & IPV6_ADDR_MAPPED)
return 4;
else if (addr->s6_addr32[0] == htonl(0x20010000))
return 6;
else if (addr->s6_addr16[0] == htons(0x2002))
return 2;
else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
return 5;
return 1;
}
int ipv6_dev_get_saddr(struct net_device *daddr_dev,
struct in6_addr *daddr, struct in6_addr *saddr)
{
......@@ -4189,7 +4159,13 @@ EXPORT_SYMBOL(unregister_inet6addr_notifier);
int __init addrconf_init(void)
{
int err = 0;
int err;
if ((err = ipv6_addr_label_init()) < 0) {
printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
err);
return err;
}
/* The addrconf netdev notifier requires that loopback_dev
* has it's ipv6 private information allocated and setup
......@@ -4240,6 +4216,8 @@ int __init addrconf_init(void)
__rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
__rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
ipv6_addr_label_rtnl_register();
#ifdef CONFIG_SYSCTL
addrconf_sysctl.sysctl_header =
register_sysctl_table(addrconf_sysctl.addrconf_root_dir);
......
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