* [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses
@ 2013-11-14 12:51 Nicolas Dichtel
2013-11-14 12:51 ` [PATCH net 2/3] sit: link local routes are missing Nicolas Dichtel
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Nicolas Dichtel @ 2013-11-14 12:51 UTC (permalink / raw)
To: davem; +Cc: netdev, Nicolas Dichtel
When the local IPv4 endpoint is wilcard (0.0.0.0), the prefix length is
correctly set, ie 64 if the address is a link local one or 96 if the address is
a v4 mapped one.
But when the local endpoint is specified, the prefix length is set to 128 for
both kind of address. This patch fix this wrong prefix length.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
---
net/ipv6/addrconf.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index cd3fb301da38..4e558e5e0e42 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2555,7 +2555,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
struct in6_addr addr;
struct net_device *dev;
struct net *net = dev_net(idev->dev);
- int scope;
+ int scope, plen;
ASSERT_RTNL();
@@ -2565,12 +2565,14 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
if (idev->dev->flags&IFF_POINTOPOINT) {
addr.s6_addr32[0] = htonl(0xfe800000);
scope = IFA_LINK;
+ plen = 64;
} else {
scope = IPV6_ADDR_COMPATv4;
+ plen = 96;
}
if (addr.s6_addr32[3]) {
- add_addr(idev, &addr, 128, scope);
+ add_addr(idev, &addr, plen, scope);
return;
}
@@ -2582,7 +2584,6 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
int flag = scope;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
- int plen;
addr.s6_addr32[3] = ifa->ifa_local;
@@ -2593,10 +2594,6 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
continue;
flag |= IFA_HOST;
}
- if (idev->dev->flags&IFF_POINTOPOINT)
- plen = 64;
- else
- plen = 96;
add_addr(idev, &addr, plen, flag);
}
--
1.8.4.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH net 2/3] sit: link local routes are missing
2013-11-14 12:51 [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses Nicolas Dichtel
@ 2013-11-14 12:51 ` Nicolas Dichtel
2013-11-14 21:59 ` David Miller
2013-11-14 12:51 ` [PATCH net 3/3] sit/gre6: don't try to add the same route two times Nicolas Dichtel
2013-11-14 21:59 ` [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses David Miller
2 siblings, 1 reply; 6+ messages in thread
From: Nicolas Dichtel @ 2013-11-14 12:51 UTC (permalink / raw)
To: davem; +Cc: netdev, Nicolas Dichtel
When a link local address was added to a sit interface, the corresponding route
was not configured. This breaks routing protocols that use the link local
address, like OSPFv3.
To ease the code reading, I remove sit_route_add(), which only adds v4 mapped
routes, and add this kind of route directly in sit_add_v4_addrs(). Thus link
local and v4 mapped routes are configured in the same place.
Reported-by: Li Hongjun <hongjun.li@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
---
net/ipv6/addrconf.c | 24 +++++-------------------
1 file changed, 5 insertions(+), 19 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 4e558e5e0e42..237bceb74c4e 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2006,23 +2006,6 @@ static void addrconf_add_mroute(struct net_device *dev)
ip6_route_add(&cfg);
}
-#if IS_ENABLED(CONFIG_IPV6_SIT)
-static void sit_route_add(struct net_device *dev)
-{
- struct fib6_config cfg = {
- .fc_table = RT6_TABLE_MAIN,
- .fc_metric = IP6_RT_PRIO_ADDRCONF,
- .fc_ifindex = dev->ifindex,
- .fc_dst_len = 96,
- .fc_flags = RTF_UP | RTF_NONEXTHOP,
- .fc_nlinfo.nl_net = dev_net(dev),
- };
-
- /* prefix length - 96 bits "::d.d.d.d" */
- ip6_route_add(&cfg);
-}
-#endif
-
static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
{
struct inet6_dev *idev;
@@ -2556,6 +2539,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
struct net_device *dev;
struct net *net = dev_net(idev->dev);
int scope, plen;
+ u32 pflags = 0;
ASSERT_RTNL();
@@ -2569,10 +2553,12 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
} else {
scope = IPV6_ADDR_COMPATv4;
plen = 96;
+ pflags |= RTF_NONEXTHOP;
}
if (addr.s6_addr32[3]) {
add_addr(idev, &addr, plen, scope);
+ addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
return;
}
@@ -2596,6 +2582,8 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
}
add_addr(idev, &addr, plen, flag);
+ addrconf_prefix_route(&addr, plen, idev->dev, 0,
+ pflags);
}
}
}
@@ -2731,8 +2719,6 @@ static void addrconf_sit_config(struct net_device *dev)
if (dev->flags&IFF_POINTOPOINT)
addrconf_add_mroute(dev);
- else
- sit_route_add(dev);
}
#endif
--
1.8.4.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH net 3/3] sit/gre6: don't try to add the same route two times
2013-11-14 12:51 [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses Nicolas Dichtel
2013-11-14 12:51 ` [PATCH net 2/3] sit: link local routes are missing Nicolas Dichtel
@ 2013-11-14 12:51 ` Nicolas Dichtel
2013-11-14 21:59 ` David Miller
2013-11-14 21:59 ` [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses David Miller
2 siblings, 1 reply; 6+ messages in thread
From: Nicolas Dichtel @ 2013-11-14 12:51 UTC (permalink / raw)
To: davem; +Cc: netdev, Nicolas Dichtel
addrconf_add_linklocal() already adds the link local route, so there is no
reason to add it before calling this function.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
---
net/ipv6/addrconf.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 237bceb74c4e..cfc47b364e51 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2709,7 +2709,6 @@ static void addrconf_sit_config(struct net_device *dev)
struct in6_addr addr;
ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
- addrconf_prefix_route(&addr, 64, dev, 0, 0);
if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
addrconf_add_linklocal(idev, &addr);
return;
@@ -2736,8 +2735,6 @@ static void addrconf_gre_config(struct net_device *dev)
}
ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
- addrconf_prefix_route(&addr, 64, dev, 0, 0);
-
if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
addrconf_add_linklocal(idev, &addr);
}
--
1.8.4.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses
2013-11-14 12:51 [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses Nicolas Dichtel
2013-11-14 12:51 ` [PATCH net 2/3] sit: link local routes are missing Nicolas Dichtel
2013-11-14 12:51 ` [PATCH net 3/3] sit/gre6: don't try to add the same route two times Nicolas Dichtel
@ 2013-11-14 21:59 ` David Miller
2 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2013-11-14 21:59 UTC (permalink / raw)
To: nicolas.dichtel; +Cc: netdev
From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Thu, 14 Nov 2013 13:51:05 +0100
> When the local IPv4 endpoint is wilcard (0.0.0.0), the prefix length is
> correctly set, ie 64 if the address is a link local one or 96 if the address is
> a v4 mapped one.
> But when the local endpoint is specified, the prefix length is set to 128 for
> both kind of address. This patch fix this wrong prefix length.
>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Applied.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net 2/3] sit: link local routes are missing
2013-11-14 12:51 ` [PATCH net 2/3] sit: link local routes are missing Nicolas Dichtel
@ 2013-11-14 21:59 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2013-11-14 21:59 UTC (permalink / raw)
To: nicolas.dichtel; +Cc: netdev
From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Thu, 14 Nov 2013 13:51:06 +0100
> When a link local address was added to a sit interface, the corresponding route
> was not configured. This breaks routing protocols that use the link local
> address, like OSPFv3.
>
> To ease the code reading, I remove sit_route_add(), which only adds v4 mapped
> routes, and add this kind of route directly in sit_add_v4_addrs(). Thus link
> local and v4 mapped routes are configured in the same place.
>
> Reported-by: Li Hongjun <hongjun.li@6wind.com>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Applied.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net 3/3] sit/gre6: don't try to add the same route two times
2013-11-14 12:51 ` [PATCH net 3/3] sit/gre6: don't try to add the same route two times Nicolas Dichtel
@ 2013-11-14 21:59 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2013-11-14 21:59 UTC (permalink / raw)
To: nicolas.dichtel; +Cc: netdev
From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Thu, 14 Nov 2013 13:51:07 +0100
> addrconf_add_linklocal() already adds the link local route, so there is no
> reason to add it before calling this function.
>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Applied.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2013-11-14 12:51 [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses Nicolas Dichtel
2013-11-14 12:51 ` [PATCH net 2/3] sit: link local routes are missing Nicolas Dichtel
2013-11-14 21:59 ` David Miller
2013-11-14 12:51 ` [PATCH net 3/3] sit/gre6: don't try to add the same route two times Nicolas Dichtel
2013-11-14 21:59 ` David Miller
2013-11-14 21:59 ` [PATCH net 1/3] sit: fix prefix length of ll and v4mapped addresses David Miller
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