ip: make -resolve addr to print names rather than addresses

As a system admin I occasionally want to be able to check that all
interfaces has a name in DNS or /etc/hosts file.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

ip/ipaddress.c

@@ -636,7 +636,7 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 		fprintf(fp, "    family %d ", ifa->ifa_family);
 
 	if (rta_tb[IFA_LOCAL]) {
-		fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
+		fprintf(fp, "%s", format_host(ifa->ifa_family,
 					      RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 					      RTA_DATA(rta_tb[IFA_LOCAL]),
 					      abuf, sizeof(abuf)));
@@ -647,7 +647,7 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 			fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 		} else {
 			fprintf(fp, " peer %s/%d ",
-				rt_addr_n2a(ifa->ifa_family,
+				format_host(ifa->ifa_family,
 					    RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 					    RTA_DATA(rta_tb[IFA_ADDRESS]),
 					    abuf, sizeof(abuf)),
@@ -657,14 +657,14 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 
 	if (rta_tb[IFA_BROADCAST]) {
 		fprintf(fp, "brd %s ",
-			rt_addr_n2a(ifa->ifa_family,
+			format_host(ifa->ifa_family,
 				    RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 				    RTA_DATA(rta_tb[IFA_BROADCAST]),
 				    abuf, sizeof(abuf)));
 	}
 	if (rta_tb[IFA_ANYCAST]) {
 		fprintf(fp, "any %s ",
-			rt_addr_n2a(ifa->ifa_family,
+			format_host(ifa->ifa_family,
 				    RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 				    RTA_DATA(rta_tb[IFA_ANYCAST]),
 				    abuf, sizeof(abuf)));