lib: constify a few parameters of helper functions

Parameters should be const whenever possible to improve code
readability and remove the need to cast away the constness of
const arguments.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/lib/if.c b/lib/if.c
index ff95cd904..5c0f5e61a 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -410,7 +410,7 @@ struct interface *if_lookup_by_index_all_vrf(ifindex_t ifindex)
 }
 
 /* Lookup interface by IP address. */
-struct interface *if_lookup_exact_address(void *src, int family,
+struct interface *if_lookup_exact_address(const void *src, int family,
 					  vrf_id_t vrf_id)
 {
 	struct vrf *vrf = vrf_lookup_by_id(vrf_id);
@@ -442,7 +442,7 @@ struct interface *if_lookup_exact_address(void *src, int family,
 }
 
 /* Lookup interface by IP address. */
-struct connected *if_lookup_address(void *matchaddr, int family,
+struct connected *if_lookup_address(const void *matchaddr, int family,
 				    vrf_id_t vrf_id)
 {
 	struct vrf *vrf = vrf_lookup_by_id(vrf_id);
@@ -479,7 +479,7 @@ struct connected *if_lookup_address(void *matchaddr, int family,
 }
 
 /* Lookup interface by prefix */
-struct interface *if_lookup_prefix(struct prefix *prefix, vrf_id_t vrf_id)
+struct interface *if_lookup_prefix(const struct prefix *prefix, vrf_id_t vrf_id)
 {
 	struct vrf *vrf = vrf_lookup_by_id(vrf_id);
 	struct listnode *cnode;
@@ -982,7 +982,8 @@ nbr_connected_log(struct nbr_connected *connected, char *str)
 }
 
 /* If two connected address has same prefix return 1. */
-static int connected_same_prefix(struct prefix *p1, struct prefix *p2)
+static int connected_same_prefix(const struct prefix *p1,
+				 const struct prefix *p2)
 {
 	if (p1->family == p2->family) {
 		if (p1->family == AF_INET
@@ -1010,7 +1011,7 @@ unsigned int connected_count_by_family(struct interface *ifp, int family)
 }
 
 struct connected *connected_lookup_prefix_exact(struct interface *ifp,
-						struct prefix *p)
+						const struct prefix *p)
 {
 	struct listnode *node;
 	struct listnode *next;
@@ -1049,7 +1050,7 @@ struct connected *connected_delete_by_prefix(struct interface *ifp,
 /* Find the address on our side that will be used when packets
    are sent to dst. */
 struct connected *connected_lookup_prefix(struct interface *ifp,
-					  struct prefix *addr)
+					  const struct prefix *addr)
 {
 	struct listnode *cnode;
 	struct connected *c;