netlink: Use struct in_addr for IPv4 addresses, not bare uint32_t

This improves consistency with IPv6 and makes it harder to misuse these as
some other sort of value.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/netlink.c b/netlink.c
index 5366982..47f2ba1 100644
--- a/netlink.c
+++ b/netlink.c
@@ -265,9 +265,9 @@ void nl_route_set_def(unsigned int ifi, sa_family_t af, void *gw)
 			} r6;
 			struct {
 				struct rtattr rta_dst;
-				uint32_t d;
+				struct in_addr d;
 				struct rtattr rta_gw;
-				uint32_t a;
+				struct in_addr a;
 			} r4;
 		} set;
 	} req = {
@@ -309,7 +309,7 @@ void nl_route_set_def(unsigned int ifi, sa_family_t af, void *gw)
 		req.set.r4.rta_dst.rta_type = RTA_DST;
 		req.set.r4.rta_dst.rta_len = rta_len;
 
-		req.set.r4.a = *(uint32_t *)gw;
+		memcpy(&req.set.r4.a, gw, sizeof(req.set.r4.a));
 		req.set.r4.rta_gw.rta_type = RTA_GATEWAY;
 		req.set.r4.rta_gw.rta_len = rta_len;
 	}
@@ -470,9 +470,9 @@ void nl_addr_set(unsigned int ifi, sa_family_t af, void *addr, int prefix_len)
 		union {
 			struct {
 				struct rtattr rta_l;
-				uint32_t l;
+				struct in_addr l;
 				struct rtattr rta_a;
-				uint32_t a;
+				struct in_addr a;
 			} a4;
 			struct {
 				struct rtattr rta_l;
@@ -516,7 +516,7 @@ void nl_addr_set(unsigned int ifi, sa_family_t af, void *addr, int prefix_len)
 		req.nlh.nlmsg_len = offsetof(struct req_t, set.a4)
 			+ sizeof(req.set.a4);
 
-		req.set.a4.l = req.set.a4.a = *(uint32_t *)addr;
+		memcpy(&req.set.a4.l, addr, sizeof(req.set.a4.l));
 		req.set.a4.rta_l.rta_len = rta_len;
 		req.set.a4.rta_l.rta_type = IFA_LOCAL;
 		req.set.a4.rta_a.rta_len = rta_len;