ensure that decoded z_bytes never contanin non-_is_alloc slice

include/zenoh-pico/collections/bytes.h

@@ -73,7 +73,7 @@ int8_t _z_bytes_from_uint64(_z_bytes_t *b, uint64_t val);
 int8_t _z_bytes_from_float(_z_bytes_t *b, float val);
 int8_t _z_bytes_from_double(_z_bytes_t *b, double val);
 size_t _z_bytes_to_buf(const _z_bytes_t *bytes, uint8_t *dst, size_t len);
-int8_t _z_bytes_from_buf(_z_bytes_t *b, uint8_t *src, size_t len);
+int8_t _z_bytes_from_buf(_z_bytes_t *b, const uint8_t *src, size_t len);
 int8_t _z_bytes_serialize_from_pair(_z_bytes_t *out, _z_bytes_t *first, _z_bytes_t *second);
 int8_t _z_bytes_deserialize_into_pair(const _z_bytes_t *bs, _z_bytes_t *first_out, _z_bytes_t *second_out);
 _z_slice_t _z_bytes_try_get_contiguous(const _z_bytes_t *bs);

src/collections/bytes.c

@@ -106,7 +106,7 @@ int8_t _z_bytes_from_slice(_z_bytes_t *b, _z_slice_t s) {
     return _z_arc_slice_svec_append(&b->_slices, &arc_s) ? _Z_RES_OK : _Z_ERR_SYSTEM_OUT_OF_MEMORY;
 }
 
-int8_t _z_bytes_from_buf(_z_bytes_t *b, uint8_t *src, size_t len) {
+int8_t _z_bytes_from_buf(_z_bytes_t *b, const uint8_t *src, size_t len) {
     *b = _z_bytes_null();
     _z_slice_t s = _z_slice_wrap_copy(src, len);
     if (s.len != len) return _Z_ERR_SYSTEM_OUT_OF_MEMORY;

src/protocol/codec.c

@@ -281,7 +281,11 @@ int8_t _z_slice_decode(_z_slice_t *bs, _z_zbuf_t *zbf) { return _z_slice_decode_
 int8_t _z_bytes_decode(_z_bytes_t *bs, _z_zbuf_t *zbf) {
     _z_slice_t s;
     _Z_RETURN_IF_ERR(_z_slice_decode(&s, zbf));
-    return _z_bytes_from_slice(bs, s);
+    if (s._is_alloc) {
+        return _z_bytes_from_slice(bs, s);
+    } else {
+        return _z_bytes_from_buf(bs, s.start, s.len);
+    }
 }
 
 int8_t _z_bytes_encode_val(_z_wbuf_t *wbf, const _z_bytes_t *bs) {