netconf: add support for ignore route attribute

Add support for ignore route attribute, and refine the code to use
rta_getattr_* function to get attribute value.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

ip/ipnetconf.c

@@ -37,6 +37,11 @@ static void usage(void)
 	exit(-1);
 }
 
+static void print_onoff(FILE *f, const char *flag, __u32 val)
+{
+	fprintf(f, "%s %s ", flag, val ? "on" : "off");
+}
+
 static struct rtattr *netconf_rta(struct netconfmsg *ncm)
 {
 	return (struct rtattr *)((char *)ncm
@@ -84,7 +89,7 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
 	}
 
 	if (tb[NETCONFA_IFINDEX]) {
-		int *ifindex = (int *)RTA_DATA(tb[NETCONFA_IFINDEX]);
+		int *ifindex = (int *)rta_getattr_str(tb[NETCONFA_IFINDEX]);
 
 		switch (*ifindex) {
 		case NETCONFA_IFINDEX_ALL:
@@ -100,10 +105,10 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
 	}
 
 	if (tb[NETCONFA_FORWARDING])
-		fprintf(fp, "forwarding %s ",
-			*(int *)RTA_DATA(tb[NETCONFA_FORWARDING])?"on":"off");
+		print_onoff(fp, "forwarding",
+				rta_getattr_u32(tb[NETCONFA_FORWARDING]));
 	if (tb[NETCONFA_RP_FILTER]) {
-		int rp_filter = *(int *)RTA_DATA(tb[NETCONFA_RP_FILTER]);
+		__u32 rp_filter = rta_getattr_u32(tb[NETCONFA_RP_FILTER]);
 
 		if (rp_filter == 0)
 			fprintf(fp, "rp_filter off ");
@@ -115,12 +120,16 @@ int print_netconf(const struct sockaddr_nl *who, struct rtnl_ctrl_data *ctrl,
 			fprintf(fp, "rp_filter unknown mode ");
 	}
 	if (tb[NETCONFA_MC_FORWARDING])
-		fprintf(fp, "mc_forwarding %d ",
-			*(int *)RTA_DATA(tb[NETCONFA_MC_FORWARDING]));
+		print_onoff(fp, "mc_forwarding",
+				rta_getattr_u32(tb[NETCONFA_MC_FORWARDING]));
 
 	if (tb[NETCONFA_PROXY_NEIGH])
-		fprintf(fp, "proxy_neigh %s ",
-			*(int *)RTA_DATA(tb[NETCONFA_PROXY_NEIGH])?"on":"off");
+		print_onoff(fp, "proxy_neigh",
+				rta_getattr_u32(tb[NETCONFA_PROXY_NEIGH]));
+
+	if (tb[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN])
+		print_onoff(fp, "ignore_routes_with_linkdown",
+		     rta_getattr_u32(tb[NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN]));
 
 	fprintf(fp, "\n");
 	fflush(fp);