Replace RTNL_LINK_NOT_FOUND with just 0

The interface index 0 is reserved and can be safely used to
signal that the device does not exist.

4 files changed, 9 insertions, 30 deletions

diff --git a/lib/route/addr.c b/lib/route/addr.c
index e9101a0..905dce2 100644
--- a/lib/route/addr.c
+++ b/lib/route/addr.c
@@ -872,10 +872,7 @@ void rtnl_addr_set_ifindex(struct rtnl_addr *addr, int ifindex)
 
 int rtnl_addr_get_ifindex(struct rtnl_addr *addr)
 {
-	if (addr->ce_mask & ADDR_ATTR_IFINDEX)
-		return addr->a_ifindex;
-	else
-		return RTNL_LINK_NOT_FOUND;
+	return addr->a_ifindex;
 }
 
 void rtnl_addr_set_family(struct rtnl_addr *addr, int family)
@@ -886,10 +883,7 @@ void rtnl_addr_set_family(struct rtnl_addr *addr, int family)
 
 int rtnl_addr_get_family(struct rtnl_addr *addr)
 {
-	if (addr->ce_mask & ADDR_ATTR_FAMILY)
-		return addr->a_family;
-	else
-		return AF_UNSPEC;
+	return addr->a_family;
 }
 
 void rtnl_addr_set_prefixlen(struct rtnl_addr *addr, int prefix)
diff --git a/lib/route/link.c b/lib/route/link.c
index 182aba8..510932f 100644
--- a/lib/route/link.c
+++ b/lib/route/link.c
@@ -1092,11 +1092,11 @@ char * rtnl_link_i2name(struct nl_cache *cache, int ifindex, char *dst,
  * @arg cache		link cache
  * @arg name		link name
  *
- * @return interface index or RTNL_LINK_NOT_FOUND if no match was found.
+ * @return interface index or 0 if no match was found.
  */
 int rtnl_link_name2i(struct nl_cache *cache, const char *name)
 {
-	int ifindex = RTNL_LINK_NOT_FOUND;
+	int ifindex = 0;
 	struct rtnl_link *link;
 	
 	link = rtnl_link_get_by_name(cache, name);
@@ -1366,10 +1366,7 @@ void rtnl_link_set_ifindex(struct rtnl_link *link, int ifindex)
 
 int rtnl_link_get_ifindex(struct rtnl_link *link)
 {
-	if (link->ce_mask & LINK_ATTR_IFINDEX)
-		return link->l_index;
-	else
-		return RTNL_LINK_NOT_FOUND;
+	return link->l_index;
 }
 
 void rtnl_link_set_mtu(struct rtnl_link *link, unsigned int mtu)
@@ -1422,10 +1419,7 @@ void rtnl_link_set_link(struct rtnl_link *link, int ifindex)
 
 int rtnl_link_get_link(struct rtnl_link *link)
 {
-	if (link->ce_mask & LINK_ATTR_LINK)
-		return link->l_link;
-	else
-		return RTNL_LINK_NOT_FOUND;
+	return link->l_link;
 }
 
 void rtnl_link_set_master(struct rtnl_link *link, int ifindex)
@@ -1436,10 +1430,7 @@ void rtnl_link_set_master(struct rtnl_link *link, int ifindex)
 
 int rtnl_link_get_master(struct rtnl_link *link)
 {
-	if (link->ce_mask & LINK_ATTR_MASTER)
-		return link->l_master;
-	else
-		return RTNL_LINK_NOT_FOUND;
+	return link->l_master;
 }
 
 void rtnl_link_set_operstate(struct rtnl_link *link, uint8_t operstate)
diff --git a/lib/route/neigh.c b/lib/route/neigh.c
index 723df7b..3c8fb1c 100644
--- a/lib/route/neigh.c
+++ b/lib/route/neigh.c
@@ -883,10 +883,7 @@ void rtnl_neigh_set_ifindex(struct rtnl_neigh *neigh, int ifindex)
 
 int rtnl_neigh_get_ifindex(struct rtnl_neigh *neigh)
 {
-	if (neigh->ce_mask & NEIGH_ATTR_IFINDEX)
-		return neigh->n_ifindex;
-	else
-		return RTNL_LINK_NOT_FOUND;
+	return neigh->n_ifindex;
 }
 
 static inline int __assign_addr(struct rtnl_neigh *neigh, struct nl_addr **pos,
diff --git a/lib/route/tc.c b/lib/route/tc.c
index de909be..15e88d4 100644
--- a/lib/route/tc.c
+++ b/lib/route/tc.c
@@ -274,10 +274,7 @@ void tca_set_ifindex(struct rtnl_tca *t, int ifindex)
 
 int tca_get_ifindex(struct rtnl_tca *t)
 {
-	if (t->ce_mask & TCA_ATTR_IFINDEX)
-		return t->tc_ifindex;
-	else
-		return RTNL_LINK_NOT_FOUND;
+	return t->tc_ifindex;
 }
 
 void tca_set_handle(struct rtnl_tca *t, uint32_t handle)