1 files changed, 43 insertions, 0 deletions
diff --git a/include/zaprus.h b/include/zaprus.h
new file mode 100644
index 0000000..6638117
--- /dev/null
+++ b/include/zaprus.h
@@ -0,0 +1,43 @@
+// Copyright 2026 Robby Zambito
+//
+// This file is part of zaprus.
+//
+// Zaprus is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+// Zaprus is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with Zaprus. If not, see <https://www.gnu.org/licenses/>. 
+
+#ifndef ZAPRUS_H
+#define ZAPRUS_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef void* zaprus_client;
+typedef void* zaprus_connection;
+
+// Returns NULL if there was an error.
+zaprus_client zaprus_init_client(void);
+
+void zaprus_deinit_client(zaprus_client client);
+
+// Returns 0 on success, else returns 1.
+int zaprus_client_send_relay(zaprus_client client, const char* payload, size_t payload_len, const char dest[4]);
+
+// Returns NULL if there was an error.
+// Caller should call zaprus_deinit_connection when done with the connection.
+zaprus_connection zaprus_connect(zaprus_client client, const char* payload, size_t payload_len);
+
+void zaprus_deinit_connection(zaprus_connection connection);
+
+// Capacity is the maximum length of the output buffer.
+// out_len is modified to specify how much of the capacity is used by the response.
+// Blocks until the next message is available, or returns 1 if the underlying socket times out.
+// Returns 0 on success, else returns 1.
+int zaprus_connection_next(zaprus_connection connection, char *out, size_t capacity, size_t *out_len);
+
+// Returns 0 on success, else returns 1.
+int zaprus_connection_send(zaprus_connection connection, const char *payload, size_t payload_len);
+
+#endif // ZAPRUS_H