* [PATCH net-next-2.6 v2] ipv6: adding ip_nonlocal_bind option from ipv4
@ 2010-07-05 10:12 Michal Humpula
2010-07-05 10:30 ` YOSHIFUJI Hideaki
0 siblings, 1 reply; 3+ messages in thread
From: Michal Humpula @ 2010-07-05 10:12 UTC (permalink / raw)
To: netdev
Adds ability to bind to non-local IPv6 address the same way as for IPv4
Signed-off-by: Michal Humpula <michal.humpula@web4u.cz>
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index f350c69..1ebed5e 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -963,6 +963,11 @@ bindv6only - BOOLEAN
Default: FALSE (as specified in RFC2553bis)
+ipv6_nonlocal_bind - BOOLEAN
+ If set, allows processes to bind() to non-local IPv6 addresses,
+ which can be quite useful - but may break some applications.
+ Default: 0
+
IPv6 Fragmentation:
ip6frag_high_thresh - INTEGER
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 7bb5cb6..8957ead 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -528,6 +528,7 @@ enum {
NET_IPV6_IP6FRAG_TIME=23,
NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
NET_IPV6_MLD_MAX_MSF=25,
+ NET_IPV6_NONLOCAL_BIND=26
};
enum {
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 1f84124..f459fcb 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -641,6 +641,8 @@ static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
#endif
#ifdef CONFIG_SYSCTL
+extern int sysctl_ipv6_nonlocal_bind;
+
extern ctl_table ipv6_route_table_template[];
extern ctl_table ipv6_icmp_table_template[];
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index 1357c57..525edae 100644
--- a/kernel/sysctl_binary.c
+++ b/kernel/sysctl_binary.c
@@ -559,6 +559,7 @@ static const struct bin_table bin_net_ipv6_table[] = {
{ CTL_DIR, NET_IPV6_ROUTE, "route", bin_net_ipv6_route_table },
{ CTL_DIR, NET_IPV6_ICMP, "icmp", bin_net_ipv6_icmp_table },
{ CTL_INT, NET_IPV6_BINDV6ONLY, "bindv6only" },
+ { CTL_INT, NET_IPV6_NONLOCAL_BIND, "ipv6_nonlocal_bind" },
{ CTL_INT, NET_IPV6_IP6FRAG_HIGH_THRESH, "ip6frag_high_thresh" },
{ CTL_INT, NET_IPV6_IP6FRAG_LOW_THRESH, "ip6frag_low_thresh" },
{ CTL_INT, NET_IPV6_IP6FRAG_TIME, "ip6frag_time" },
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index e830cd4..ed59ec4 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -252,6 +252,8 @@ out_rcu_unlock:
goto out;
}
+int sysctl_ipv6_nonlocal_bind __read_mostly;
+EXPORT_SYMBOL(sysctl_ipv6_nonlocal_bind);
/* bind for INET6 API */
int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
@@ -342,12 +344,11 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
* unspecified and mapped address have a v4 equivalent.
*/
v4addr = LOOPBACK4_IPV6;
- if (!(addr_type & IPV6_ADDR_MULTICAST)) {
- if (!ipv6_chk_addr(net, &addr->sin6_addr,
- dev, 0)) {
- err = -EADDRNOTAVAIL;
- goto out_unlock;
- }
+ if (!(addr_type & IPV6_ADDR_MULTICAST) &&
+ !sysctl_ipv6_nonlocal_bind &&
+ !ipv6_chk_addr(net, &addr->sin6_addr, dev, 0)) {
+ err = -EADDRNOTAVAIL;
+ goto out_unlock;
}
rcu_read_unlock();
}
diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index fa1d8f4..56bfe76 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -35,6 +35,13 @@ static ctl_table ipv6_table_template[] = {
.mode = 0644,
.proc_handler = proc_dointvec
},
+ {
+ .procname = "ipv6_nonlocal_bind",
+ .data = &sysctl_ipv6_nonlocal_bind,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
{ }
};
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH net-next-2.6 v2] ipv6: adding ip_nonlocal_bind option from ipv4
2010-07-05 10:12 [PATCH net-next-2.6 v2] ipv6: adding ip_nonlocal_bind option from ipv4 Michal Humpula
@ 2010-07-05 10:30 ` YOSHIFUJI Hideaki
2010-07-05 11:59 ` Michal Humpula
0 siblings, 1 reply; 3+ messages in thread
From: YOSHIFUJI Hideaki @ 2010-07-05 10:30 UTC (permalink / raw)
To: Michal Humpula; +Cc: netdev, yoshfuji
Hello.
Mails are crossing, but additional comments below.
Michal Humpula wrote:
> diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
> index 1357c57..525edae 100644
> --- a/kernel/sysctl_binary.c
> +++ b/kernel/sysctl_binary.c
> @@ -559,6 +559,7 @@ static const struct bin_table bin_net_ipv6_table[] = {
> { CTL_DIR, NET_IPV6_ROUTE, "route", bin_net_ipv6_route_table },
> { CTL_DIR, NET_IPV6_ICMP, "icmp", bin_net_ipv6_icmp_table },
> { CTL_INT, NET_IPV6_BINDV6ONLY, "bindv6only" },
> + { CTL_INT, NET_IPV6_NONLOCAL_BIND, "ipv6_nonlocal_bind" },
> { CTL_INT, NET_IPV6_IP6FRAG_HIGH_THRESH, "ip6frag_high_thresh" },
> { CTL_INT, NET_IPV6_IP6FRAG_LOW_THRESH, "ip6frag_low_thresh" },
> { CTL_INT, NET_IPV6_IP6FRAG_TIME, "ip6frag_time" },
No more binary interface.
> diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
> index e830cd4..ed59ec4 100644
> --- a/net/ipv6/af_inet6.c
> +++ b/net/ipv6/af_inet6.c
> @@ -252,6 +252,8 @@ out_rcu_unlock:
> goto out;
> }
>
> +int sysctl_ipv6_nonlocal_bind __read_mostly;
> +EXPORT_SYMBOL(sysctl_ipv6_nonlocal_bind);
>
why?
In IPv4 it seems to be exported for SCTP. Probably you need to
look into SCTP as well.
--yoshfuji
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH net-next-2.6 v2] ipv6: adding ip_nonlocal_bind option from ipv4
2010-07-05 10:30 ` YOSHIFUJI Hideaki
@ 2010-07-05 11:59 ` Michal Humpula
0 siblings, 0 replies; 3+ messages in thread
From: Michal Humpula @ 2010-07-05 11:59 UTC (permalink / raw)
To: YOSHIFUJI Hideaki; +Cc: netdev
On Monday 05 of July 2010 12:30:32 YOSHIFUJI Hideaki wrote:
> Hello.
>
> Mails are crossing, but additional comments below.
>
> Michal Humpula wrote:
> > diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
> > index 1357c57..525edae 100644
> > --- a/kernel/sysctl_binary.c
> > +++ b/kernel/sysctl_binary.c
> > @@ -559,6 +559,7 @@ static const struct bin_table bin_net_ipv6_table[] =
> > {
> >
> > { CTL_DIR, NET_IPV6_ROUTE, "route", bin_net_ipv6_route_table },
> > { CTL_DIR, NET_IPV6_ICMP, "icmp", bin_net_ipv6_icmp_table },
> > { CTL_INT, NET_IPV6_BINDV6ONLY, "bindv6only" },
> >
> > + { CTL_INT, NET_IPV6_NONLOCAL_BIND, "ipv6_nonlocal_bind" },
> >
> > { CTL_INT, NET_IPV6_IP6FRAG_HIGH_THRESH, "ip6frag_high_thresh" },
> > { CTL_INT, NET_IPV6_IP6FRAG_LOW_THRESH, "ip6frag_low_thresh" },
> > { CTL_INT, NET_IPV6_IP6FRAG_TIME, "ip6frag_time" },
>
> No more binary interface.
>
> > diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
> > index e830cd4..ed59ec4 100644
> > --- a/net/ipv6/af_inet6.c
> > +++ b/net/ipv6/af_inet6.c
> >
> > @@ -252,6 +252,8 @@ out_rcu_unlock:
> > goto out;
> >
> > }
> >
> > +int sysctl_ipv6_nonlocal_bind __read_mostly;
> > +EXPORT_SYMBOL(sysctl_ipv6_nonlocal_bind);
>
> why?
>
> In IPv4 it seems to be exported for SCTP. Probably you need to
> look into SCTP as well.
>
> --yoshfuji
Thanks for review. I should obviously wait a little bit longer before posting the v2.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-07-05 10:12 [PATCH net-next-2.6 v2] ipv6: adding ip_nonlocal_bind option from ipv4 Michal Humpula
2010-07-05 10:30 ` YOSHIFUJI Hideaki
2010-07-05 11:59 ` Michal Humpula
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