Fix shared cipher linkage and transport type includes

src/chat/chat_attachment.c

@@ -6,7 +6,7 @@
 #include "chat_feedback.h"
 #include "member_sync.h"
 #include "../utun_instance.h"
-#include "../transport_layer/etcp_connections.h"
+#include "../transport_layer/etcp.h"
 #include "../routing_layer/etcp_router.h"
 #include "../routing_layer/topo_node_sqlite.h"
 #include "../media_delivery/media_index.h"

src/dm/dm_crypto.h

@@ -14,6 +14,10 @@
 #include <stddef.h>
 #include "../media_async/media_crypto.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 
 #define DM_CONTENT_KEY_SIZE  32
 #define DM_NONCE_SIZE        13   /* AES-CCM требует ровно 13 байт */
@@ -35,4 +39,8 @@ int dm_derive_content_key(const uint8_t my_priv[32], const uint8_t peer_pub[32],
  * не пересекается между направлениями (author различается). */
 void dm_build_nonce(uint64_t conv_id, uint64_t author, uint64_t seq, uint8_t nonce[DM_NONCE_SIZE]);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* DM_CRYPTO_H */