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Revert "sit: stateless autoconf for isatap" 

This reverts commit 645069299a.

While the code does not actually break anything, it does not completely follow
RFC5214 yet. After talking back with Fred L. Templin, I agree that completing the
ISATAP specific RS/RA code, would pollute the kernel a lot with code that is better
implemented in userspace.

The kernel should not send RS packages for ISATAP at all.

Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de>
Acked-by: Fred L. Templin <Fred.L.Templin@boeing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sascha Hlusiak 2009-09-26 20:28:07 -07:00 committed by David S. Miller
parent 7eaf5077b3
commit d1f8297a96
4 changed files with 1 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/if_tunnel.h
View File

@ -44,7 +44,7 @@ struct ip_tunnel_prl {
__u16 flags;
__u16 __reserved;
__u32 datalen;
__u32 rs_delay;
__u32 __reserved2;
/* data follows */
};

7
include/net/ipip.h
View File

@ -27,18 +27,11 @@ struct ip_tunnel
unsigned int prl_count; /* # of entries in PRL */
};
/* ISATAP: default interval between RS in secondy */
#define IPTUNNEL_RS_DEFAULT_DELAY (900)
struct ip_tunnel_prl_entry
{
struct ip_tunnel_prl_entry *next;
__be32 addr;
u16 flags;
unsigned long rs_delay;
struct timer_list rs_timer;
struct ip_tunnel *tunnel;
spinlock_t lock;
};
#define IPTUNNEL_XMIT() do { \

1
net/ipv6/ndisc.c
View File

@ -658,7 +658,6 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
&icmp6h, NULL,
send_sllao ? ND_OPT_SOURCE_LL_ADDR : 0);
}
EXPORT_SYMBOL(ndisc_send_rs);
static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb)

58
net/ipv6/sit.c
View File

@ -15,7 +15,6 @@
* Roger Venning <r.venning@telstra.com>: 6to4 support
* Nate Thompson <nate@thebog.net>: 6to4 support
* Fred Templin <fred.l.templin@boeing.com>: isatap support
* Sascha Hlusiak <mail@saschahlusiak.de>: stateless autoconf for isatap
*/
#include <linux/module.h>
@ -223,44 +222,6 @@ failed:
return NULL;
}
static void ipip6_tunnel_rs_timer(unsigned long data)
{
struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *) data;
struct inet6_dev *ifp;
struct inet6_ifaddr *addr;
spin_lock(&p->lock);
ifp = __in6_dev_get(p->tunnel->dev);
read_lock_bh(&ifp->lock);
for (addr = ifp->addr_list; addr; addr = addr->if_next) {
struct in6_addr rtr;
if (!(ipv6_addr_type(&addr->addr) & IPV6_ADDR_LINKLOCAL))
continue;
/* Send RS to guessed linklocal address of router
*
* Better: send to ff02::2 encapsuled in unicast directly
* to router-v4 instead of guessing the v6 address.
*
* Cisco/Windows seem to not set the u/l bit correctly,
* so we won't guess right.
*/
ipv6_addr_set(&rtr, htonl(0xFE800000), 0, 0, 0);
if (!__ipv6_isatap_ifid(rtr.s6_addr + 8,
p->addr)) {
ndisc_send_rs(p->tunnel->dev, &addr->addr, &rtr);
}
}
read_unlock_bh(&ifp->lock);
mod_timer(&p->rs_timer, jiffies + HZ * p->rs_delay);
spin_unlock(&p->lock);
return;
}
static struct ip_tunnel_prl_entry *
__ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
{
@ -319,7 +280,6 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t,
continue;
kp[c].addr = prl->addr;
kp[c].flags = prl->flags;
kp[c].rs_delay = prl->rs_delay;
c++;
if (kprl.addr != htonl(INADDR_ANY))
break;
@ -369,23 +329,11 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
}
p->next = t->prl;
p->tunnel = t;
t->prl = p;
t->prl_count++;
spin_lock_init(&p->lock);
setup_timer(&p->rs_timer, ipip6_tunnel_rs_timer, (unsigned long) p);
update:
p->addr = a->addr;
p->flags = a->flags;
p->rs_delay = a->rs_delay;
if (p->rs_delay == 0)
p->rs_delay = IPTUNNEL_RS_DEFAULT_DELAY;
spin_lock(&p->lock);
del_timer(&p->rs_timer);
if (p->flags & PRL_DEFAULT)
mod_timer(&p->rs_timer, jiffies + 1);
spin_unlock(&p->lock);
out:
write_unlock(&ipip6_lock);
return err;
@ -404,9 +352,6 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
if ((*p)->addr == a->addr) {
x = *p;
*p = x->next;
spin_lock(&x->lock);
del_timer(&x->rs_timer);
spin_unlock(&x->lock);
kfree(x);
t->prl_count--;
goto out;
@ -417,9 +362,6 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
while (t->prl) {
x = t->prl;
t->prl = t->prl->next;
spin_lock(&x->lock);
del_timer(&x->rs_timer);
spin_unlock(&x->lock);
kfree(x);
t->prl_count--;
}