diff --git a/src/transport/socket.h b/src/transport/socket.h
new file mode 100644
index 0000000..17751ca
--- /dev/null
+++ b/src/transport/socket.h
@@ -0,0 +1,14 @@
+#ifndef LIBPLDM_SRC_TRANSPORT_SOCKET_H
+#define LIBPLDM_SRC_TRANSPORT_SOCKET_H
+
+struct pldm_socket_sndbuf {
+	int size;
+	int socket;
+	int max_size;
+};
+
+int pldm_socket_sndbuf_init(struct pldm_socket_sndbuf *ctx, int socket);
+int pldm_socket_sndbuf_accomodate(struct pldm_socket_sndbuf *ctx, int msg_len);
+int pldm_socket_sndbuf_get(struct pldm_socket_sndbuf *ctx);
+
+#endif // LIBPLDM_SRC_TRANSPORT_SOCKET_H