Add native GNS server bridge

server/native_transport/co_gns_server_bridge.h

@@ -0,0 +1,88 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(_WIN32)
+#if defined(CO_GNS_BRIDGE_BUILD)
+#define CO_GNS_API __declspec(dllexport)
+#else
+#define CO_GNS_API __declspec(dllimport)
+#endif
+#else
+#define CO_GNS_API __attribute__((visibility("default")))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void* co_gns_server_handle;
+
+enum co_gns_event_type
+{
+    CO_GNS_EVENT_NONE = 0,
+    CO_GNS_EVENT_CONNECTED = 1,
+    CO_GNS_EVENT_DISCONNECTED = 2,
+    CO_GNS_EVENT_MESSAGE = 3,
+    CO_GNS_EVENT_OVERSIZE_MESSAGE = 4
+};
+
+enum co_gns_delivery
+{
+    CO_GNS_DELIVERY_UNRELIABLE_SEQUENCED = 0,
+    CO_GNS_DELIVERY_RELIABLE_ORDERED = 1
+};
+
+enum co_gns_send_result
+{
+    CO_GNS_SEND_ERROR = -1,
+    CO_GNS_SEND_SENT = 0,
+    CO_GNS_SEND_DROPPED = 1,
+    CO_GNS_SEND_BACKPRESSURE = 2,
+    CO_GNS_SEND_NOT_CONNECTED = 3,
+    CO_GNS_SEND_TOO_LARGE = 4
+};
+
+typedef struct co_gns_event
+{
+    uint32_t type;
+    uint32_t connection_id;
+    int32_t reason;
+    uint32_t payload_size;
+    char debug[128];
+} co_gns_event;
+
+CO_GNS_API int co_gns_server_create(
+    const char* bind_host,
+    uint16_t port,
+    co_gns_server_handle* out_handle,
+    char* error_buffer,
+    size_t error_buffer_size);
+
+CO_GNS_API void co_gns_server_destroy(co_gns_server_handle handle);
+CO_GNS_API uint16_t co_gns_server_local_port(co_gns_server_handle handle);
+CO_GNS_API uint32_t co_gns_server_connection_count(co_gns_server_handle handle);
+
+CO_GNS_API int co_gns_server_poll(
+    co_gns_server_handle handle,
+    co_gns_event* out_event,
+    void* payload_buffer,
+    uint32_t payload_capacity);
+
+CO_GNS_API int co_gns_server_send(
+    co_gns_server_handle handle,
+    uint32_t connection_id,
+    const void* payload,
+    uint32_t payload_size,
+    uint32_t delivery);
+
+CO_GNS_API int co_gns_server_disconnect(
+    co_gns_server_handle handle,
+    uint32_t connection_id,
+    int32_t reason,
+    const char* debug);
+
+#ifdef __cplusplus
+}
+#endif