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Message-Id: <20080403.113811.105715223.yoshfuji@linux-ipv6.org>
Date: Thu, 03 Apr 2008 11:38:11 +0900 (JST)
From: YOSHIFUJI Hideaki / 吉藤英明
<yoshfuji@...ux-ipv6.org>
To: davem@...emloft.net
Cc: yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org,
fred.l.templin@...ing.com
Subject: [RFC net-2.6.26] [IPV6] SIT: ISATAP Updates.
Hello.
This updates ISATAP implementation in Linux kernel
based on the update from Templin, Fred L <fred.l.templin@...ing.com>.
One big question is the "dump" support (4th commit).
Since we cannot use copy_to_user family inside the lock,
nasty kcalloc() is used inside the lock so far...
Patches are also available at
git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-dev.git net-2.6.26-isatap-20080403
Regards,
---
HEADLINES
---------
[IPV6] SIT: Add PRL management for ISATAP.
[IPV6] SIT: Fix locking issues in PRL management.
[IPV6] SIT: Disallow 0.0.0.0 in PRL and Flush PRL if given for DEL.
[IPV6] SIT: Add SIOCGETPRL ioctl to get/dump PRL.
[IPV6] NDISC: Ignore route information with /0 prefix from interior router.
[IPV6]: Unify ip6_onlink() and ipip6_onlink().
[IPV6] NDISC: Don't rely on node-type hint from L2 unless required.
DIFFSTAT
--------
include/linux/if_tunnel.h | 22 +++-
include/linux/skbuff.h | 5 +
include/net/addrconf.h | 4 +
include/net/ipip.h | 10 ++
include/net/ndisc.h | 9 ++
net/ipv6/Kconfig | 4 +
net/ipv6/addrconf.c | 25 ++++
net/ipv6/anycast.c | 25 ----
net/ipv6/ndisc.c | 42 +++++++
net/ipv6/route.c | 2
net/ipv6/sit.c | 257 +++++++++++++++++++++++++++++++++++++--------
11 files changed, 330 insertions(+), 75 deletions(-)
CHANGESETS
----------
commit fadf6bf06069138f8e97c9a963be38348ba2708b
Author: Templin, Fred L <Fred.L.Templin@...ing.com>
Date: Tue Mar 11 18:35:59 2008 -0400
[IPV6] SIT: Add PRL management for ISATAP.
This patch updates the Linux the Intra-Site Automatic Tunnel Addressing
Protocol (ISATAP) implementation. It places the ISATAP potential router
list (PRL) in the kernel and adds three new private ioctls for PRL
management.
[Add several changes of structure name, constant names etc. - yoshfuji]
Signed-off-by: Fred L. Templin <fred.l.templin@...ing.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index 228eb4e..f20c224 100644
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -7,6 +7,9 @@
#define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1)
#define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2)
#define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3)
+#define SIOCADDPRL (SIOCDEVPRIVATE + 5)
+#define SIOCDELPRL (SIOCDEVPRIVATE + 6)
+#define SIOCCHGPRL (SIOCDEVPRIVATE + 7)
#define GRE_CSUM __constant_htons(0x8000)
#define GRE_ROUTING __constant_htons(0x4000)
@@ -17,9 +20,6 @@
#define GRE_FLAGS __constant_htons(0x00F8)
#define GRE_VERSION __constant_htons(0x0007)
-/* i_flags values for SIT mode */
-#define SIT_ISATAP 0x0001
-
struct ip_tunnel_parm
{
char name[IFNAMSIZ];
@@ -31,4 +31,16 @@ struct ip_tunnel_parm
struct iphdr iph;
};
+/* SIT-mode i_flags */
+#define SIT_ISATAP 0x0001
+
+struct ip_tunnel_prl {
+ __be32 addr;
+ __u16 flags;
+ __u16 __reserved;
+};
+
+/* PRL flags */
+#define PRL_DEFAULT 0x0001
+
#endif /* _IF_TUNNEL_H_ */
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index ff72145..e10e55c 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -313,7 +313,8 @@ struct sk_buff {
__u16 tc_verd; /* traffic control verdict */
#endif
#endif
- /* 2 byte hole */
+ __u8 ndisc_nodetype:2;
+ /* 14 bit hole */
#ifdef CONFIG_NET_DMA
dma_cookie_t dma_cookie;
diff --git a/include/net/ipip.h b/include/net/ipip.h
index 549e132..205536a 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -24,6 +24,13 @@ struct ip_tunnel
int mlink;
struct ip_tunnel_parm parms;
+ struct ip_tunnel_prl_entry *prl; /* potential router list */
+};
+
+struct ip_tunnel_prl_entry
+{
+ struct ip_tunnel_prl_entry *next;
+ struct ip_tunnel_prl entry;
};
#define IPTUNNEL_XMIT() do { \
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 5aedf32..9f2bae6 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -12,6 +12,15 @@
#define NDISC_REDIRECT 137
/*
+ * Router type: cross-layer information from link-layer to
+ * IPv6 layer reported by certain link types (e.g., RFC4214).
+ */
+#define NDISC_NODETYPE_UNSPEC 0 /* unspecified (default) */
+#define NDISC_NODETYPE_HOST 1 /* host or unauthorized router */
+#define NDISC_NODETYPE_NODEFAULT 2 /* non-default router */
+#define NDISC_NODETYPE_DEFAULT 3 /* default router */
+
+/*
* ndisc options
*/
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 510aa74..53b5460 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1092,6 +1092,12 @@ static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 RA: from host or unauthorized router\n");
+ return;
+ }
+
/*
* set the RA_RECV flag in the interface
*/
@@ -1115,6 +1121,10 @@ static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
+ /* skip link-specific parameters from interior routers */
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+ goto skip_linkparms;
+
if (in6_dev->if_flags & IF_RS_SENT) {
/*
* flag that an RA was received after an RS was sent
@@ -1229,6 +1239,8 @@ skip_defrtr:
}
}
+skip_linkparms:
+
/*
* Process options.
*/
@@ -1268,6 +1280,10 @@ skip_defrtr:
}
#endif
+ /* skip link-specific ndopts from interior routers */
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+ goto out;
+
if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {
struct nd_opt_hdr *p;
for (p = ndopts.nd_opts_pi;
@@ -1331,6 +1347,14 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
int optlen;
u8 *lladdr = NULL;
+ switch (skb->ndisc_nodetype) {
+ case NDISC_NODETYPE_HOST:
+ case NDISC_NODETYPE_NODEFAULT:
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 Redirect: from host or unauthorized router\n");
+ return;
+ }
+
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: source address is not link-local.\n");
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index cd82b6d..f17b2f6 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1699,8 +1699,6 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
return rt;
}
-EXPORT_SYMBOL(rt6_get_dflt_router);
-
struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
struct net_device *dev,
unsigned int pref)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 1b8196c..4786419 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -16,7 +16,7 @@
* Changes:
* Roger Venning <r.venning@...stra.com>: 6to4 support
* Nate Thompson <nate@...bog.net>: 6to4 support
- * Fred L. Templin <fltemplin@....org>: isatap support
+ * Fred Templin <fred.l.templin@...ing.com>: isatap support
*/
#include <linux/module.h>
@@ -197,6 +197,119 @@ failed:
return NULL;
}
+static struct ip_tunnel_prl_entry *
+ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
+{
+ struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *)NULL;
+
+ for (p = t->prl; p; p = p->next)
+ if (p->entry.addr == addr)
+ break;
+ return p;
+
+}
+
+static int
+ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
+{
+ struct ip_tunnel_prl_entry *p;
+
+ for (p = t->prl; p; p = p->next) {
+ if (p->entry.addr == a->addr) {
+ if (chg) {
+ p->entry = *a;
+ return 0;
+ }
+ return -EEXIST;
+ }
+ }
+
+ if (chg)
+ return -ENXIO;
+
+ p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL);
+ if (!p)
+ return -ENOBUFS;
+
+ p->entry = *a;
+ p->next = t->prl;
+ t->prl = p;
+ return 0;
+}
+
+static int
+ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
+{
+ struct ip_tunnel_prl_entry *x, **p;
+
+ if (a) {
+ for (p = &t->prl; *p; p = &(*p)->next) {
+ if ((*p)->entry.addr == a->addr) {
+ x = *p;
+ *p = x->next;
+ kfree(x);
+ return 0;
+ }
+ }
+ return -ENXIO;
+ } else {
+ while (t->prl) {
+ x = t->prl;
+ t->prl = t->prl->next;
+ kfree(x);
+ }
+ }
+ return 0;
+}
+
+/* copied directly from anycast.c */
+static int
+ipip6_onlink(struct in6_addr *addr, struct net_device *dev)
+{
+ struct inet6_dev *idev;
+ struct inet6_ifaddr *ifa;
+ int onlink;
+
+ onlink = 0;
+ rcu_read_lock();
+ idev = __in6_dev_get(dev);
+ if (idev) {
+ read_lock_bh(&idev->lock);
+ for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
+ onlink = ipv6_prefix_equal(addr, &ifa->addr,
+ ifa->prefix_len);
+ if (onlink)
+ break;
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ rcu_read_unlock();
+ return onlink;
+}
+
+static int
+isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
+{
+ struct ip_tunnel_prl_entry *p = ipip6_tunnel_locate_prl(t, iph->saddr);
+ int ok = 1;
+
+ if (p) {
+ if (p->entry.flags & PRL_DEFAULT)
+ skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT;
+ else
+ skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT;
+ } else {
+ struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr;
+ if (ipv6_addr_is_isatap(addr6) &&
+ (addr6->s6_addr32[3] == iph->saddr) &&
+ ipip6_onlink(addr6, t->dev))
+ skb->ndisc_nodetype = NDISC_NODETYPE_HOST;
+ else
+ ok = 0;
+ }
+ return ok;
+}
+
static void ipip6_tunnel_uninit(struct net_device *dev)
{
if (dev == ipip6_fb_tunnel_dev) {
@@ -206,6 +319,7 @@ static void ipip6_tunnel_uninit(struct net_device *dev)
dev_put(dev);
} else {
ipip6_tunnel_unlink(netdev_priv(dev));
+ ipip6_tunnel_del_prl(netdev_priv(dev), 0);
dev_put(dev);
}
}
@@ -365,48 +479,6 @@ static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
IP6_ECN_set_ce(ipv6_hdr(skb));
}
-/* ISATAP (RFC4214) - check source address */
-static int
-isatap_srcok(struct sk_buff *skb, struct iphdr *iph, struct net_device *dev)
-{
- struct neighbour *neigh;
- struct dst_entry *dst;
- struct rt6_info *rt;
- struct flowi fl;
- struct in6_addr *addr6;
- struct in6_addr rtr;
- struct ipv6hdr *iph6;
- int ok = 0;
-
- /* from onlink default router */
- ipv6_addr_set(&rtr, htonl(0xFE800000), 0, 0, 0);
- ipv6_isatap_eui64(rtr.s6_addr + 8, iph->saddr);
- if ((rt = rt6_get_dflt_router(&rtr, dev))) {
- dst_release(&rt->u.dst);
- return 1;
- }
-
- iph6 = ipv6_hdr(skb);
- memset(&fl, 0, sizeof(fl));
- fl.proto = iph6->nexthdr;
- ipv6_addr_copy(&fl.fl6_dst, &iph6->saddr);
- fl.oif = dev->ifindex;
- security_skb_classify_flow(skb, &fl);
-
- dst = ip6_route_output(&init_net, NULL, &fl);
- if (!dst->error && (dst->dev == dev) && (neigh = dst->neighbour)) {
-
- addr6 = (struct in6_addr*)&neigh->primary_key;
-
- /* from correct previous hop */
- if (ipv6_addr_is_isatap(addr6) &&
- (addr6->s6_addr32[3] == iph->saddr))
- ok = 1;
- }
- dst_release(dst);
- return ok;
-}
-
static int ipip6_rcv(struct sk_buff *skb)
{
struct iphdr *iph;
@@ -427,7 +499,7 @@ static int ipip6_rcv(struct sk_buff *skb)
skb->pkt_type = PACKET_HOST;
if ((tunnel->dev->priv_flags & IFF_ISATAP) &&
- !isatap_srcok(skb, iph, tunnel->dev)) {
+ !isatap_chksrc(skb, iph, tunnel)) {
tunnel->stat.rx_errors++;
read_unlock(&ipip6_lock);
kfree_skb(skb);
@@ -707,6 +779,7 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
{
int err = 0;
struct ip_tunnel_parm p;
+ struct ip_tunnel_prl prl;
struct ip_tunnel *t;
switch (cmd) {
@@ -806,6 +879,31 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
err = 0;
break;
+ case SIOCADDPRL:
+ case SIOCDELPRL:
+ case SIOCCHGPRL:
+ err = -EPERM;
+ if (!capable(CAP_NET_ADMIN))
+ goto done;
+ err = -EINVAL;
+ if (dev == ipip6_fb_tunnel_dev)
+ goto done;
+ err = -EFAULT;
+ if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl)))
+ goto done;
+ err = -ENOENT;
+ if (!(t = netdev_priv(dev)))
+ goto done;
+
+ ipip6_tunnel_unlink(t);
+ if (cmd == SIOCDELPRL)
+ err = ipip6_tunnel_del_prl(t, &prl);
+ else
+ err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL);
+ ipip6_tunnel_link(t);
+ netdev_state_change(dev);
+ break;
+
default:
err = -EINVAL;
}
---
commit 3fcfa12904e83cc291cf2b7b05ff2530068920a4
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Sat Mar 22 17:42:57 2008 +0900
[IPV6] SIT: Fix locking issues in PRL management.
To protect PRL list, use ipip6_lock.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 4786419..ee0cc28 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -198,7 +198,7 @@ failed:
}
static struct ip_tunnel_prl_entry *
-ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
+__ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
{
struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *)NULL;
@@ -213,34 +213,46 @@ static int
ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
{
struct ip_tunnel_prl_entry *p;
+ int err = 0;
+
+ write_lock(&ipip6_lock);
for (p = t->prl; p; p = p->next) {
if (p->entry.addr == a->addr) {
- if (chg) {
- p->entry = *a;
- return 0;
- }
- return -EEXIST;
+ if (chg)
+ goto update;
+ err = -EEXIST;
+ goto out;
}
}
- if (chg)
- return -ENXIO;
+ if (chg) {
+ err = -ENXIO;
+ goto out;
+ }
p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL);
- if (!p)
- return -ENOBUFS;
+ if (!p) {
+ err = -ENOBUFS;
+ goto out;
+ }
- p->entry = *a;
p->next = t->prl;
t->prl = p;
- return 0;
+update:
+ p->entry = *a;
+out:
+ write_unlock(&ipip6_lock);
+ return err;
}
static int
ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
{
struct ip_tunnel_prl_entry *x, **p;
+ int err = 0;
+
+ write_lock(&ipip6_lock);
if (a) {
for (p = &t->prl; *p; p = &(*p)->next) {
@@ -248,10 +260,10 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
x = *p;
*p = x->next;
kfree(x);
- return 0;
+ goto out;
}
}
- return -ENXIO;
+ err = -ENXIO;
} else {
while (t->prl) {
x = t->prl;
@@ -259,6 +271,8 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
kfree(x);
}
}
+out:
+ write_unlock(&ipip6_lock);
return 0;
}
@@ -290,9 +304,11 @@ ipip6_onlink(struct in6_addr *addr, struct net_device *dev)
static int
isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
{
- struct ip_tunnel_prl_entry *p = ipip6_tunnel_locate_prl(t, iph->saddr);
+ struct ip_tunnel_prl_entry *p;
int ok = 1;
+ read_lock(&ipip6_lock);
+ p = __ipip6_tunnel_locate_prl(t, iph->saddr);
if (p) {
if (p->entry.flags & PRL_DEFAULT)
skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT;
@@ -307,6 +323,7 @@ isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
else
ok = 0;
}
+ read_unlock(&ipip6_lock);
return ok;
}
@@ -895,12 +912,10 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
if (!(t = netdev_priv(dev)))
goto done;
- ipip6_tunnel_unlink(t);
if (cmd == SIOCDELPRL)
err = ipip6_tunnel_del_prl(t, &prl);
else
err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL);
- ipip6_tunnel_link(t);
netdev_state_change(dev);
break;
---
commit 0009ae1f50fb10178b5f54216ce567f3cb1d7267
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Sat Mar 22 17:50:59 2008 +0900
[IPV6] SIT: Disallow 0.0.0.0 in PRL and Flush PRL if given for DEL.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index ee0cc28..84c1ed2 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -215,6 +215,9 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
struct ip_tunnel_prl_entry *p;
int err = 0;
+ if (a->addr == htonl(INADDR_ANY))
+ return -EINVAL;
+
write_lock(&ipip6_lock);
for (p = t->prl; p; p = p->next) {
@@ -254,7 +257,7 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
write_lock(&ipip6_lock);
- if (a) {
+ if (a && a->addr != htonl(INADDR_ANY)) {
for (p = &t->prl; *p; p = &(*p)->next) {
if ((*p)->entry.addr == a->addr) {
x = *p;
---
commit 300aaeeaab5f447fcf40e911afe96df3de28f0db
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Mon Mar 24 18:28:39 2008 +0900
[IPV6] SIT: Add SIOCGETPRL ioctl to get/dump PRL.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index f20c224..f1fbe9c 100644
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -7,6 +7,7 @@
#define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1)
#define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2)
#define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3)
+#define SIOCGETPRL (SIOCDEVPRIVATE + 4)
#define SIOCADDPRL (SIOCDEVPRIVATE + 5)
#define SIOCDELPRL (SIOCDEVPRIVATE + 6)
#define SIOCCHGPRL (SIOCDEVPRIVATE + 7)
@@ -38,6 +39,9 @@ struct ip_tunnel_prl {
__be32 addr;
__u16 flags;
__u16 __reserved;
+ __u32 datalen;
+ __u32 __reserved2;
+ void __user *data;
};
/* PRL flags */
diff --git a/include/net/ipip.h b/include/net/ipip.h
index 205536a..633ed4d 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -24,13 +24,16 @@ struct ip_tunnel
int mlink;
struct ip_tunnel_parm parms;
+
struct ip_tunnel_prl_entry *prl; /* potential router list */
+ unsigned int prl_count; /* # of entries in PRL */
};
struct ip_tunnel_prl_entry
{
struct ip_tunnel_prl_entry *next;
- struct ip_tunnel_prl entry;
+ __be32 addr;
+ u16 flags;
};
#define IPTUNNEL_XMIT() do { \
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 84c1ed2..08a483a 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -203,12 +203,73 @@ __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *)NULL;
for (p = t->prl; p; p = p->next)
- if (p->entry.addr == addr)
+ if (p->addr == addr)
break;
return p;
}
+static int ipip6_tunnel_get_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
+{
+ struct ip_tunnel_prl *kp;
+ struct ip_tunnel_prl_entry *prl;
+ unsigned int cmax, c = 0, ca, len;
+ int ret = 0;
+
+ cmax = a->datalen / sizeof(*a);
+ if (cmax > 1 && a->addr != htonl(INADDR_ANY))
+ cmax = 1;
+
+ /* For simple GET or for root users,
+ * we try harder to allocate.
+ */
+ kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ?
+ kcalloc(cmax, sizeof(*kp), GFP_KERNEL) :
+ NULL;
+
+ read_lock(&ipip6_lock);
+
+ ca = t->prl_count < cmax ? t->prl_count : cmax;
+
+ if (!kp) {
+ /* We don't try hard to allocate much memory for
+ * non-root users.
+ * For root users, retry allocating enough memory for
+ * the answer.
+ */
+ kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC);
+ if (!kp) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ }
+
+ c = 0;
+ for (prl = t->prl; prl; prl = prl->next) {
+ if (c > cmax)
+ break;
+ if (a->addr != htonl(INADDR_ANY) && prl->addr != a->addr)
+ continue;
+ kp[c].addr = prl->addr;
+ kp[c].flags = prl->flags;
+ c++;
+ if (a->addr != htonl(INADDR_ANY))
+ break;
+ }
+out:
+ read_unlock(&ipip6_lock);
+
+ len = sizeof(*kp) * c;
+ ret = len ? copy_to_user(a->data, kp, len) : 0;
+
+ kfree(kp);
+ if (ret)
+ return -EFAULT;
+
+ a->datalen = len;
+ return 0;
+}
+
static int
ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
{
@@ -221,7 +282,7 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
write_lock(&ipip6_lock);
for (p = t->prl; p; p = p->next) {
- if (p->entry.addr == a->addr) {
+ if (p->addr == a->addr) {
if (chg)
goto update;
err = -EEXIST;
@@ -242,8 +303,10 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
p->next = t->prl;
t->prl = p;
+ t->prl_count++;
update:
- p->entry = *a;
+ p->addr = a->addr;
+ p->flags = a->flags;
out:
write_unlock(&ipip6_lock);
return err;
@@ -259,10 +322,11 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
if (a && a->addr != htonl(INADDR_ANY)) {
for (p = &t->prl; *p; p = &(*p)->next) {
- if ((*p)->entry.addr == a->addr) {
+ if ((*p)->addr == a->addr) {
x = *p;
*p = x->next;
kfree(x);
+ t->prl_count--;
goto out;
}
}
@@ -272,6 +336,7 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
x = t->prl;
t->prl = t->prl->next;
kfree(x);
+ t->prl_count--;
}
}
out:
@@ -313,7 +378,7 @@ isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
read_lock(&ipip6_lock);
p = __ipip6_tunnel_locate_prl(t, iph->saddr);
if (p) {
- if (p->entry.flags & PRL_DEFAULT)
+ if (p->flags & PRL_DEFAULT)
skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT;
else
skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT;
@@ -899,11 +964,12 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
err = 0;
break;
+ case SIOCGETPRL:
case SIOCADDPRL:
case SIOCDELPRL:
case SIOCCHGPRL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (cmd != SIOCGETPRL && !capable(CAP_NET_ADMIN))
goto done;
err = -EINVAL;
if (dev == ipip6_fb_tunnel_dev)
@@ -915,11 +981,23 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
if (!(t = netdev_priv(dev)))
goto done;
- if (cmd == SIOCDELPRL)
+ switch (cmd) {
+ case SIOCGETPRL:
+ err = ipip6_tunnel_get_prl(t, &prl);
+ if (!err && copy_to_user(ifr->ifr_ifru.ifru_data,
+ &prl, sizeof(prl)))
+ err = -EFAULT;
+ break;
+ case SIOCDELPRL:
err = ipip6_tunnel_del_prl(t, &prl);
- else
+ break;
+ case SIOCADDPRL:
+ case SIOCCHGPRL:
err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL);
- netdev_state_change(dev);
+ break;
+ }
+ if (cmd != SIOCGETPRL)
+ netdev_state_change(dev);
break;
default:
---
commit 6294e000736401d4415ad41f408e56e14aaaf7b4
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Sat Mar 15 23:56:52 2008 -0400
[IPV6] NDISC: Ignore route information with /0 prefix from interior router.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 53b5460..16273e1 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1272,7 +1272,13 @@ skip_linkparms:
for (p = ndopts.nd_opts_ri;
p;
p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) {
- if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
+ struct route_info *ri = (struct route_info *)p;
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT &&
+ ri->prefix_len == 0)
+ continue;
+#endif
+ if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
continue;
rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,
&ipv6_hdr(skb)->saddr);
---
commit 52eeeb8481d705e61e2e9aae974e7799a93783e9
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Sat Mar 15 22:54:23 2008 -0400
[IPV6]: Unify ip6_onlink() and ipip6_onlink().
Both are identical, let's create ipv6_chk_prefix() and use it
in both places.
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index d89b0bc..bdcc863 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -71,6 +71,10 @@ extern int ipv6_chk_addr(struct net *net,
extern int ipv6_chk_home_addr(struct net *net,
struct in6_addr *addr);
#endif
+
+extern int ipv6_chk_prefix(struct in6_addr *addr,
+ struct net_device *dev);
+
extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
struct in6_addr *addr,
struct net_device *dev,
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 5ab9973..c17f8c0 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1249,6 +1249,31 @@ int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
return ifp != NULL;
}
+int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
+{
+ struct inet6_dev *idev;
+ struct inet6_ifaddr *ifa;
+ int onlink;
+
+ onlink = 0;
+ rcu_read_lock();
+ idev = __in6_dev_get(dev);
+ if (idev) {
+ read_lock_bh(&idev->lock);
+ for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
+ onlink = ipv6_prefix_equal(addr, &ifa->addr,
+ ifa->prefix_len);
+ if (onlink)
+ break;
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ rcu_read_unlock();
+ return onlink;
+}
+
+EXPORT_SYMBOL(ipv6_chk_prefix);
+
struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, struct in6_addr *addr,
struct net_device *dev, int strict)
{
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 463bd95..36e8174 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -48,29 +48,6 @@ static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr);
/* Big ac list lock for all the sockets */
static DEFINE_RWLOCK(ipv6_sk_ac_lock);
-static int
-ip6_onlink(struct in6_addr *addr, struct net_device *dev)
-{
- struct inet6_dev *idev;
- struct inet6_ifaddr *ifa;
- int onlink;
-
- onlink = 0;
- rcu_read_lock();
- idev = __in6_dev_get(dev);
- if (idev) {
- read_lock_bh(&idev->lock);
- for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
- onlink = ipv6_prefix_equal(addr, &ifa->addr,
- ifa->prefix_len);
- if (onlink)
- break;
- }
- read_unlock_bh(&idev->lock);
- }
- rcu_read_unlock();
- return onlink;
-}
/*
* socket join an anycast group
@@ -142,7 +119,7 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
* This obviates the need for propagating anycast routes while
* still allowing some non-router anycast participation.
*/
- if (!ip6_onlink(addr, dev)) {
+ if (!ipv6_chk_prefix(addr, dev)) {
if (ishost)
err = -EADDRNOTAVAIL;
if (err)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 08a483a..cc16fe0 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -344,31 +344,6 @@ out:
return 0;
}
-/* copied directly from anycast.c */
-static int
-ipip6_onlink(struct in6_addr *addr, struct net_device *dev)
-{
- struct inet6_dev *idev;
- struct inet6_ifaddr *ifa;
- int onlink;
-
- onlink = 0;
- rcu_read_lock();
- idev = __in6_dev_get(dev);
- if (idev) {
- read_lock_bh(&idev->lock);
- for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
- onlink = ipv6_prefix_equal(addr, &ifa->addr,
- ifa->prefix_len);
- if (onlink)
- break;
- }
- read_unlock_bh(&idev->lock);
- }
- rcu_read_unlock();
- return onlink;
-}
-
static int
isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
{
@@ -386,7 +361,7 @@ isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr;
if (ipv6_addr_is_isatap(addr6) &&
(addr6->s6_addr32[3] == iph->saddr) &&
- ipip6_onlink(addr6, t->dev))
+ ipv6_chk_prefix(addr6, t->dev))
skb->ndisc_nodetype = NDISC_NODETYPE_HOST;
else
ok = 0;
---
commit de357cc01334a468e4d5b7ba66a17b0d3ca9d63e
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Sat Mar 15 23:59:18 2008 -0400
[IPV6] NDISC: Don't rely on node-type hint from L2 unless required.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index e10e55c..e517701 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -313,7 +313,9 @@ struct sk_buff {
__u16 tc_verd; /* traffic control verdict */
#endif
#endif
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
__u8 ndisc_nodetype:2;
+#endif
/* 14 bit hole */
#ifdef CONFIG_NET_DMA
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index 47263e4..7d2e7f0 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -168,6 +168,7 @@ config IPV6_SIT
tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
depends on IPV6
select INET_TUNNEL
+ select IPV6_NDISC_NODETYPE
default y
---help---
Tunneling means encapsulating data of one protocol type within
@@ -178,6 +179,9 @@ config IPV6_SIT
Saying M here will produce a module called sit.ko. If unsure, say Y.
+config IPV6_NDISC_NODETYPE
+ bool
+
config IPV6_TUNNEL
tristate "IPv6: IP-in-IPv6 tunnel (RFC2473)"
select INET6_TUNNEL
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 16273e1..c400b87 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1092,11 +1092,13 @@ static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 RA: from host or unauthorized router\n");
return;
}
+#endif
/*
* set the RA_RECV flag in the interface
@@ -1121,9 +1123,11 @@ static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
/* skip link-specific parameters from interior routers */
if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
goto skip_linkparms;
+#endif
if (in6_dev->if_flags & IF_RS_SENT) {
/*
@@ -1239,7 +1243,9 @@ skip_defrtr:
}
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
skip_linkparms:
+#endif
/*
* Process options.
@@ -1286,9 +1292,11 @@ skip_linkparms:
}
#endif
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
/* skip link-specific ndopts from interior routers */
if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
goto out;
+#endif
if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {
struct nd_opt_hdr *p;
@@ -1353,6 +1361,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
int optlen;
u8 *lladdr = NULL;
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
switch (skb->ndisc_nodetype) {
case NDISC_NODETYPE_HOST:
case NDISC_NODETYPE_NODEFAULT:
@@ -1360,6 +1369,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
"ICMPv6 Redirect: from host or unauthorized router\n");
return;
}
+#endif
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
ND_PRINTK2(KERN_WARNING
---
--
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