Patchwork [iproute2] vxlan: add ipv6 support

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Submitter Amerigo Wang
Date April 17, 2013, 5:10 a.m.
Message ID <1366175423-27310-7-git-send-email-amwang@redhat.com>
Download mbox | patch
Permalink /patch/237152/
State Awaiting Upstream
Delegated to: stephen hemminger
Headers show

Comments

Amerigo Wang - April 17, 2013, 5:10 a.m.
From: Cong Wang <amwang@redhat.com>

Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Cong Wang <amwang@redhat.com>
---
 include/linux/if_link.h |    2 ++
 ip/iplink_vxlan.c       |   45 ++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 40 insertions(+), 7 deletions(-)

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stephen hemminger - April 18, 2013, 10:55 p.m.
On Wed, 17 Apr 2013 13:10:23 +0800
Cong Wang <amwang@redhat.com> wrote:

> From: Cong Wang <amwang@redhat.com>
> 
> Cc: Stephen Hemminger <stephen@networkplumber.org>
> Signed-off-by: Cong Wang <amwang@redhat.com>
> ---
>  include/linux/if_link.h |    2 ++
>  ip/iplink_vxlan.c       |   45 ++++++++++++++++++++++++++++++++++++++-------
>  2 files changed, 40 insertions(+), 7 deletions(-)
> 

Resubmit after net-next is merged to upstream.
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stephen hemminger - April 18, 2013, 10:57 p.m.
On Wed, 17 Apr 2013 13:10:23 +0800
Cong Wang <amwang@redhat.com> wrote:

> +			if (!inet_pton(AF_INET, *argv, &gaddr)) {
> +				if (!inet_pton(AF_INET6, *argv, &gaddr6)) {
> +					fprintf(stderr, "Invalid address \"%s\"\n", *argv);
> +					return -1;
> +				} else if (!IN6_IS_ADDR_MULTICAST(&gaddr6))
> +					invarg("invald group address", *argv);
> +			} else if (!IN_MULTICAST(ntohl(gaddr)))
> +					invarg("invald group address", *argv);

Maybe using getaddrinfo would be better to allow symbolic names as well?
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Amerigo Wang - April 19, 2013, 11:36 a.m.
On Thu, 2013-04-18 at 15:55 -0700, Stephen Hemminger wrote:
> On Wed, 17 Apr 2013 13:10:23 +0800
> Cong Wang <amwang@redhat.com> wrote:
> 
> > From: Cong Wang <amwang@redhat.com>
> > 
> > Cc: Stephen Hemminger <stephen@networkplumber.org>
> > Signed-off-by: Cong Wang <amwang@redhat.com>
> > ---
> >  include/linux/if_link.h |    2 ++
> >  ip/iplink_vxlan.c       |   45 ++++++++++++++++++++++++++++++++++++++-------
> >  2 files changed, 40 insertions(+), 7 deletions(-)
> > 
> 
> Resubmit after net-next is merged to upstream.

Sure, I carry it for completeness.


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Amerigo Wang - April 19, 2013, 2:20 p.m.
On Thu, 2013-04-18 at 15:57 -0700, Stephen Hemminger wrote:
> On Wed, 17 Apr 2013 13:10:23 +0800
> Cong Wang <amwang@redhat.com> wrote:
> 
> > +			if (!inet_pton(AF_INET, *argv, &gaddr)) {
> > +				if (!inet_pton(AF_INET6, *argv, &gaddr6)) {
> > +					fprintf(stderr, "Invalid address \"%s\"\n", *argv);
> > +					return -1;
> > +				} else if (!IN6_IS_ADDR_MULTICAST(&gaddr6))
> > +					invarg("invald group address", *argv);
> > +			} else if (!IN_MULTICAST(ntohl(gaddr)))
> > +					invarg("invald group address", *argv);
> 
> Maybe using getaddrinfo would be better to allow symbolic names as well?

Yes, but I don't think many people use symbolic name for a multicast
group?

Thanks.

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stephen hemminger - April 19, 2013, 3:26 p.m.
On Fri, 19 Apr 2013 22:20:12 +0800
Cong Wang <amwang@redhat.com> wrote:

> On Thu, 2013-04-18 at 15:57 -0700, Stephen Hemminger wrote:
> > On Wed, 17 Apr 2013 13:10:23 +0800
> > Cong Wang <amwang@redhat.com> wrote:
> > 
> > > +			if (!inet_pton(AF_INET, *argv, &gaddr)) {
> > > +				if (!inet_pton(AF_INET6, *argv, &gaddr6)) {
> > > +					fprintf(stderr, "Invalid address \"%s\"\n", *argv);
> > > +					return -1;
> > > +				} else if (!IN6_IS_ADDR_MULTICAST(&gaddr6))
> > > +					invarg("invald group address", *argv);
> > > +			} else if (!IN_MULTICAST(ntohl(gaddr)))
> > > +					invarg("invald group address", *argv);
> > 
> > Maybe using getaddrinfo would be better to allow symbolic names as well?
> 
> Yes, but I don't think many people use symbolic name for a multicast
> group?
> 
> Thanks.
> 

You can use AI_NUMERICHOST to avoid symbolic names.
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Patch

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 40167af..a5f43d5 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -306,6 +306,8 @@  enum {
 	IFLA_VXLAN_RSC,
 	IFLA_VXLAN_L2MISS,
 	IFLA_VXLAN_L3MISS,
+	IFLA_VXLAN_REMOTE6,
+	IFLA_VXLAN_LOCAL6,
 	__IFLA_VXLAN_MAX
 };
 #define IFLA_VXLAN_MAX	(__IFLA_VXLAN_MAX - 1)
diff --git a/ip/iplink_vxlan.c b/ip/iplink_vxlan.c
index 1025326..661ab9e 100644
--- a/ip/iplink_vxlan.c
+++ b/ip/iplink_vxlan.c
@@ -42,6 +42,8 @@  static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
 	int vni_set = 0;
 	__u32 saddr = 0;
 	__u32 gaddr = 0;
+	struct in6_addr saddr6 = IN6ADDR_ANY_INIT;
+	struct in6_addr gaddr6 = IN6ADDR_ANY_INIT;
 	unsigned link = 0;
 	__u8 tos = 0;
 	__u8 ttl = 0;
@@ -65,15 +67,26 @@  static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
 			vni_set = 1;
 		} else if (!matches(*argv, "group")) {
 			NEXT_ARG();
-			gaddr = get_addr32(*argv);
-
-			if (!IN_MULTICAST(ntohl(gaddr)))
-				invarg("invald group address", *argv);
+			if (!inet_pton(AF_INET, *argv, &gaddr)) {
+				if (!inet_pton(AF_INET6, *argv, &gaddr6)) {
+					fprintf(stderr, "Invalid address \"%s\"\n", *argv);
+					return -1;
+				} else if (!IN6_IS_ADDR_MULTICAST(&gaddr6))
+					invarg("invald group address", *argv);
+			} else if (!IN_MULTICAST(ntohl(gaddr)))
+					invarg("invald group address", *argv);
 		} else if (!matches(*argv, "local")) {
 			NEXT_ARG();
-			if (strcmp(*argv, "any"))
-				saddr = get_addr32(*argv);
-			if (IN_MULTICAST(ntohl(saddr)))
+			if (strcmp(*argv, "any")) {
+				if (!inet_pton(AF_INET, *argv, &saddr)) {
+					if (!inet_pton(AF_INET6, *argv, &saddr6)) {
+						fprintf(stderr, "Invalid address \"%s\"\n", *argv);
+						return -1;
+					}
+				}
+			}
+
+			if (IN_MULTICAST(ntohl(saddr)) || IN6_IS_ADDR_MULTICAST(&saddr6))
 				invarg("invalid local address", *argv);
 		} else if (!matches(*argv, "dev")) {
 			NEXT_ARG();
@@ -163,8 +176,14 @@  static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
 	addattr32(n, 1024, IFLA_VXLAN_ID, vni);
 	if (gaddr)
 		addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4);
+	else if (memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) != 0)
+		addattr_l(n, 1024, IFLA_VXLAN_REMOTE6, &gaddr6, sizeof(struct in6_addr));
+
 	if (saddr)
 		addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4);
+	else if (memcmp(&saddr6, &in6addr_any, sizeof(saddr6)) != 0)
+		addattr_l(n, 1024, IFLA_VXLAN_LOCAL6, &saddr6, sizeof(struct in6_addr));
+
 	if (link)
 		addattr32(n, 1024, IFLA_VXLAN_LINK, link);
 	addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);
@@ -211,6 +230,12 @@  static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 		if (addr)
 			fprintf(f, "group %s ",
 				format_host(AF_INET, 4, &addr, s1, sizeof(s1)));
+	} else if (tb[IFLA_VXLAN_REMOTE6]) {
+		struct in6_addr addr;
+		memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_REMOTE6]), sizeof(struct in6_addr));
+		if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0)
+			fprintf(f, "group %s ",
+				format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1)));
 	}
 
 	if (tb[IFLA_VXLAN_LOCAL]) {
@@ -218,6 +243,12 @@  static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 		if (addr)
 			fprintf(f, "local %s ",
 				format_host(AF_INET, 4, &addr, s1, sizeof(s1)));
+	} else if (tb[IFLA_VXLAN_LOCAL6]) {
+		struct in6_addr addr;
+		memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr));
+		if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0)
+			fprintf(f, "local %s ",
+				format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1)));
 	}
 
 	if (tb[IFLA_VXLAN_LINK] &&