libnftnl: constify object arguments to various functions

flow table support needs constant object arguments to printing functions
to avoid ugly casts. While at it, also constify object arguments to message
construction, destructor and a few helper functions.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/expr/log.c b/src/expr/log.c
index f615d8e..c3dc0a6 100644
--- a/src/expr/log.c
+++ b/src/expr/log.c
@@ -123,7 +123,7 @@ static int nftnl_expr_log_cb(const struct nlattr *attr, void *data)
 }
 
 static void
-nftnl_expr_log_build(struct nlmsghdr *nlh, struct nftnl_expr *e)
+nftnl_expr_log_build(struct nlmsghdr *nlh, const struct nftnl_expr *e)
 {
 	struct nftnl_expr_log *log = nftnl_expr_data(e);
 
@@ -265,7 +265,7 @@ static int nftnl_expr_log_xml_parse(struct nftnl_expr *e,
 }
 
 static int nftnl_expr_log_snprintf_default(char *buf, size_t size,
-					      struct nftnl_expr *e)
+					   const struct nftnl_expr *e)
 {
 	struct nftnl_expr_log *log = nftnl_expr_data(e);
 	int ret, offset = 0, len = size;
@@ -288,7 +288,7 @@ static int nftnl_expr_log_snprintf_default(char *buf, size_t size,
 }
 
 static int nftnl_expr_log_export(char *buf, size_t size,
-				    struct nftnl_expr *e, int type)
+				 const struct nftnl_expr *e, int type)
 {
 	struct nftnl_expr_log *log = nftnl_expr_data(e);
 	NFTNL_BUF_INIT(b, buf, size);
@@ -311,7 +311,7 @@ static int nftnl_expr_log_export(char *buf, size_t size,
 
 static int
 nftnl_expr_log_snprintf(char *buf, size_t len, uint32_t type,
-			    uint32_t flags, struct nftnl_expr *e)
+			uint32_t flags, const struct nftnl_expr *e)
 {
 	switch(type) {
 	case NFTNL_OUTPUT_DEFAULT:
@@ -325,7 +325,7 @@ nftnl_expr_log_snprintf(char *buf, size_t len, uint32_t type,
 	return -1;
 }
 
-static void nftnl_expr_log_free(struct nftnl_expr *e)
+static void nftnl_expr_log_free(const struct nftnl_expr *e)
 {
 	struct nftnl_expr_log *log = nftnl_expr_data(e);