From c8eb33c2c25521a8c915b234fec3706369063da3 Mon Sep 17 00:00:00 2001
From: Tim Kourt <tim.a.kourt@linux.intel.com>
Date: Fri, 27 Sep 2019 12:52:22 -0700
Subject: [PATCH] rtnlutil: Add parser for IPv6 RTNL packet

At this time, we are only looking for IFA_ADDRESS attribute that
represents the IPv6 IP address.
---
 src/rtnlutil.c | 30 ++++++++++++++++++++++++++++++
 src/rtnlutil.h |  3 +++
 2 files changed, 33 insertions(+)

diff --git a/src/rtnlutil.c b/src/rtnlutil.c
index d20b3284..b1d6450e 100644
--- a/src/rtnlutil.c
+++ b/src/rtnlutil.c
@@ -418,3 +418,33 @@ uint32_t rtnl_route_ipv4_add_gateway(struct l_netlink *rtnl, int ifindex,
 				gateway, src, priority_offset, proto, cb,
 				user_data, destroy);
 }
+
+void rtnl_ifaddr_ipv6_extract(const struct ifaddrmsg *ifa, int len, char **ip)
+{
+	struct in6_addr in6_addr;
+	struct rtattr *attr;
+	char address[128];
+
+	for (attr = IFA_RTA(ifa); RTA_OK(attr, len);
+						attr = RTA_NEXT(attr, len)) {
+		switch (attr->rta_type) {
+		case IFA_ADDRESS:
+			if (!ip)
+				break;
+
+			memcpy(&in6_addr.s6_addr, RTA_DATA(attr),
+						sizeof(in6_addr.s6_addr));
+
+			if (!inet_ntop(AF_INET6, &in6_addr, address,
+							INET6_ADDRSTRLEN)) {
+
+				l_error("rtnl: Failed to extract IPv6 address");
+				break;
+			}
+
+			*ip = l_strdup(address);
+
+			break;
+		}
+	}
+}
diff --git a/src/rtnlutil.h b/src/rtnlutil.h
index b159d959..8c0a923d 100644
--- a/src/rtnlutil.h
+++ b/src/rtnlutil.h
@@ -67,3 +67,6 @@ uint32_t rtnl_route_ipv4_add_gateway(struct l_netlink *rtnl, int ifindex,
 					l_netlink_command_func_t cb,
 					void *user_data,
 					l_netlink_destroy_func_t destroy);
+
+void rtnl_ifaddr_ipv6_extract(const struct ifaddrmsg *ifa, int bytes,
+								char **ip);