1 files changed, 7 insertions, 7 deletions

diff --git a/include/libnftnl/gen.h b/include/libnftnl/gen.h
index 3eb8470..d0f638f 100644
--- a/include/libnftnl/gen.h
+++ b/include/libnftnl/gen.h
@@ -15,7 +15,7 @@ extern "C" {
 struct nftnl_gen;
 
 struct nftnl_gen *nftnl_gen_alloc(void);
-void nftnl_gen_free(struct nftnl_gen *);
+void nftnl_gen_free(const struct nftnl_gen *);
 
 enum {
 	NFTNL_GEN_ID 	= 0,
@@ -28,18 +28,18 @@ void nftnl_gen_unset(struct nftnl_gen *gen, uint16_t attr);
 void nftnl_gen_set(struct nftnl_gen *gen, uint16_t attr, const void *data);
 void nftnl_gen_set_data(struct nftnl_gen *gen, uint16_t attr,
 			     const void *data, uint32_t data_len);
-const void *nftnl_gen_get(struct nftnl_gen *gen, uint16_t attr);
-const void *nftnl_gen_get_data(struct nftnl_gen *gen, uint16_t attr,
-				    uint32_t *data_len);
+const void *nftnl_gen_get(const struct nftnl_gen *gen, uint16_t attr);
+const void *nftnl_gen_get_data(const struct nftnl_gen *gen, uint16_t attr,
+			       uint32_t *data_len);
 
 void nftnl_gen_set_u32(struct nftnl_gen *gen, uint16_t attr, uint32_t data);
-uint32_t nftnl_gen_get_u32(struct nftnl_gen *gen, uint16_t attr);
+uint32_t nftnl_gen_get_u32(const struct nftnl_gen *gen, uint16_t attr);
 
 struct nlmsghdr;
 int nftnl_gen_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_gen *gen);
 
-int nftnl_gen_snprintf(char *buf, size_t size, struct nftnl_gen *gen, uint32_t type, uint32_t flags);
-int nftnl_gen_fprintf(FILE *fp, struct nftnl_gen *gen, uint32_t type, uint32_t flags);
+int nftnl_gen_snprintf(char *buf, size_t size, const struct nftnl_gen *gen, uint32_t type, uint32_t flags);
+int nftnl_gen_fprintf(FILE *fp, const struct nftnl_gen *gen, uint32_t type, uint32_t flags);
 
 #define nftnl_gen_nlmsg_build_hdr	nftnl_nlmsg_build_hdr
 int nftnl_gen_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_gen *gen);