netlink: constify conntrack object parameter of nl_*_conntrack()

This patch constifies the first parameter, which is a conntrack
object, in all nl_*_conntrack() functions.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

2 files changed, 8 insertions, 7 deletions

diff --git a/include/netlink.h b/include/netlink.h
index 7e2b94c..af98c5e 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -20,15 +20,15 @@ void nl_resize_socket_buffer(struct nfct_handle *h);
 
 int nl_dump_conntrack_table(void);
 
-int nl_exist_conntrack(struct nf_conntrack *ct);
+int nl_exist_conntrack(const struct nf_conntrack *ct);
 
-int nl_get_conntrack(struct nf_conntrack *ct);
+int nl_get_conntrack(const struct nf_conntrack *ct);
 
 int nl_create_conntrack(const struct nf_conntrack *ct);
 
 int nl_update_conntrack(const struct nf_conntrack *ct);
 
-int nl_destroy_conntrack(struct nf_conntrack *ct);
+int nl_destroy_conntrack(const struct nf_conntrack *ct);
 
 static inline int ct_is_related(const struct nf_conntrack *ct)
 {
diff --git a/src/netlink.c b/src/netlink.c
index 5929232..89c85d7 100644
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -154,7 +154,8 @@ int nl_overrun_request_resync(void)
 	return nfct_send(STATE(overrun), NFCT_Q_DUMP, &family);
 }
 
-static int __nl_get_conntrack(struct nfct_handle *h, struct nf_conntrack *ct)
+static int
+__nl_get_conntrack(struct nfct_handle *h, const struct nf_conntrack *ct)
 {
 	int ret;
 	char __tmp[nfct_maxsize()];
@@ -172,13 +173,13 @@ static int __nl_get_conntrack(struct nfct_handle *h, struct nf_conntrack *ct)
 	return 1;
 }
 
-int nl_exist_conntrack(struct nf_conntrack *ct)
+int nl_exist_conntrack(const struct nf_conntrack *ct)
 {
 	return __nl_get_conntrack(STATE(request), ct);
 }
 
 /* get the conntrack and update the cache */
-int nl_get_conntrack(struct nf_conntrack *ct)
+int nl_get_conntrack(const struct nf_conntrack *ct)
 {
 	return __nl_get_conntrack(STATE(dump), ct);
 }
@@ -268,7 +269,7 @@ int nl_update_conntrack(const struct nf_conntrack *orig)
 	return ret;
 }
 
-int nl_destroy_conntrack(struct nf_conntrack *ct)
+int nl_destroy_conntrack(const struct nf_conntrack *ct)
 {
 	return nfct_query(STATE(dump), NFCT_Q_DESTROY, ct);
 }