From f3f343c04bc8bfef533da315b19301a2454b8e1a Mon Sep 17 00:00:00 2001
From: Tim Kourt <tim.a.kourt@linux.intel.com>
Date: Tue, 25 Jun 2019 15:20:53 -0700
Subject: [PATCH] rtnlutil: Add parser for ifaddrmsg struct

Its purpose is to extract interface label, ip, and
broadcast addresses out of ifaddrmsg rntl message.
---
 src/rtnlutil.c | 36 ++++++++++++++++++++++++++++++++++++
 src/rtnlutil.h |  3 +++
 2 files changed, 39 insertions(+)

diff --git a/src/rtnlutil.c b/src/rtnlutil.c
index 57196ff8..963faed3 100644
--- a/src/rtnlutil.c
+++ b/src/rtnlutil.c
@@ -26,6 +26,7 @@
 
 #include <sys/socket.h>
 #include <linux/rtnetlink.h>
+#include <arpa/inet.h>
 
 #include <ell/ell.h>
 
@@ -74,3 +75,38 @@ uint32_t rtnl_set_linkmode_and_operstate(struct l_netlink *rtnl, int ifindex,
 
 	return id;
 }
+
+void rtnl_ifaddr_extract(const struct ifaddrmsg *ifa, int bytes,
+				char **label, char **ip, char **broadcast)
+{
+	struct in_addr in_addr;
+	struct rtattr *attr;
+
+	for (attr = IFA_RTA(ifa); RTA_OK(attr, bytes);
+						attr = RTA_NEXT(attr, bytes)) {
+		switch (attr->rta_type) {
+		case IFA_LOCAL:
+			if (!ip)
+				break;
+
+			in_addr = *((struct in_addr *) RTA_DATA(attr));
+			*ip = l_strdup(inet_ntoa(in_addr));
+
+			break;
+		case IFA_BROADCAST:
+			if (!broadcast)
+				break;
+
+			in_addr = *((struct in_addr *) RTA_DATA(attr));
+			*broadcast = l_strdup(inet_ntoa(in_addr));
+
+			break;
+		case IFA_LABEL:
+			if (!label)
+				break;
+
+			*label = l_strdup(RTA_DATA(attr));
+			break;
+		}
+	}
+}
diff --git a/src/rtnlutil.h b/src/rtnlutil.h
index 0caa7179..030a6baf 100644
--- a/src/rtnlutil.h
+++ b/src/rtnlutil.h
@@ -25,3 +25,6 @@ uint32_t rtnl_set_linkmode_and_operstate(struct l_netlink *rtnl, int ifindex,
 					l_netlink_command_func_t cb,
 					void *user_data,
 					l_netlink_destroy_func_t destroy);
+
+void rtnl_ifaddr_extract(const struct ifaddrmsg *ifa, int bytes,
+				char **label, char **ip, char **broadcast);