lib: Use const for ssm_pk_buff getters

Mark ssm_pk_buff_get_off, _head, _tail, and _len as taking a const
struct ssm_pk_buff *. Cast through the flex array in _head and _tail
since the buffer view they return remains mutable.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 6 insertions, 6 deletions

diff --git a/src/lib/ssm/pool.c b/src/lib/ssm/pool.c
index f2c94133..5265fb4d 100644
--- a/src/lib/ssm/pool.c
+++ b/src/lib/ssm/pool.c
@@ -783,28 +783,28 @@ int ssm_pool_remove(struct ssm_pool * pool,
         return 0;
 }
 
-size_t ssm_pk_buff_get_off(struct ssm_pk_buff * spb)
+size_t ssm_pk_buff_get_off(const struct ssm_pk_buff * spb)
 {
         assert(spb != NULL);
 
         return spb->off;
 }
 
-uint8_t * ssm_pk_buff_head(struct ssm_pk_buff * spb)
+uint8_t * ssm_pk_buff_head(const struct ssm_pk_buff * spb)
 {
         assert(spb != NULL);
 
-        return spb->data + spb->pk_head;
+        return (uint8_t *) spb->data + spb->pk_head;
 }
 
-uint8_t * ssm_pk_buff_tail(struct ssm_pk_buff * spb)
+uint8_t * ssm_pk_buff_tail(const struct ssm_pk_buff * spb)
 {
         assert(spb != NULL);
 
-        return spb->data + spb->pk_tail;
+        return (uint8_t *) spb->data + spb->pk_tail;
 }
 
-size_t ssm_pk_buff_len(struct ssm_pk_buff * spb)
+size_t ssm_pk_buff_len(const struct ssm_pk_buff * spb)
 {
         assert(spb != NULL);