Diff: esp32-driver/ESP32Stack.cpp

Revision:

0:8f8e8f3cbd1c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/esp32-driver/ESP32Stack.cpp	Thu Jun 21 17:50:21 2018 +0000
@@ -0,0 +1,204 @@
+/* ESP32 implementation of NetworkInterfaceAPI
+ * Copyright (c) 2015 ARM Limited
+ * Copyright (c) 2017 Renesas Electronics Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <string.h>
+#include "ESP32Stack.h"
+
+// ESP32Stack implementation
+ESP32Stack::ESP32Stack(PinName en, PinName io0, PinName tx, PinName rx, bool debug,
+    PinName rts, PinName cts, int baudrate)
+{
+    _esp = ESP32::getESP32Inst(en, io0, tx, rx, debug, rts, cts, baudrate);
+}
+
+struct esp32_socket {
+    int id;
+    nsapi_protocol_t proto;
+    bool connected;
+    SocketAddress addr;
+    bool accept_id;
+    bool tcp_server;
+};
+
+int ESP32Stack::socket_open(void **handle, nsapi_protocol_t proto)
+{
+    // Look for an unused socket
+    int id = _esp->get_free_id();
+
+    if (id == -1) {
+        return NSAPI_ERROR_NO_SOCKET;
+    }
+
+    struct esp32_socket *socket = new struct esp32_socket;
+    if (!socket) {
+        return NSAPI_ERROR_NO_SOCKET;
+    }
+
+    socket->id = id;
+    socket->proto = proto;
+    socket->connected = false;
+    socket->accept_id = false;
+    socket->tcp_server = false;
+    *handle = socket;
+    return 0;
+}
+
+int ESP32Stack::socket_close(void *handle)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+    int err = 0;
+
+    if (!_esp->close(socket->id, socket->accept_id)) {
+        err = NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    if (socket->tcp_server) {
+        _esp->del_server();
+    }
+
+    delete socket;
+    return err;
+}
+
+int ESP32Stack::socket_bind(void *handle, const SocketAddress &address)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+
+    socket->addr = address;
+    return 0;
+}
+
+int ESP32Stack::socket_listen(void *handle, int backlog)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+
+    (void)backlog;
+
+    if (socket->proto != NSAPI_TCP) {
+        return NSAPI_ERROR_UNSUPPORTED;
+    }
+
+    if (!_esp->cre_server(socket->addr.get_port())) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    socket->tcp_server = true;
+    return 0;
+}
+
+int ESP32Stack::socket_connect(void *handle, const SocketAddress &addr)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+
+    const char *proto = (socket->proto == NSAPI_UDP) ? "UDP" : "TCP";
+    if (!_esp->open(proto, socket->id, addr.get_ip_address(), addr.get_port())) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    socket->connected = true;
+    return 0;
+}
+
+int ESP32Stack::socket_accept(void *server, void **socket, SocketAddress *addr)
+{
+    int id;
+
+    if (!_esp->accept(&id)) {
+        return NSAPI_ERROR_NO_SOCKET;
+    }
+
+    struct esp32_socket *socket_new = new struct esp32_socket;
+    if (!socket_new) {
+        return NSAPI_ERROR_NO_SOCKET;
+    }
+
+    socket_new->id = id;
+    socket_new->proto = NSAPI_TCP;
+    socket_new->connected = true;
+    socket_new->accept_id = true;
+    socket_new->tcp_server = false;
+    *socket = socket_new;
+
+    return 0;
+}
+
+int ESP32Stack::socket_send(void *handle, const void *data, unsigned size)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+
+    if (!_esp->send(socket->id, data, size)) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    return size;
+}
+
+int ESP32Stack::socket_recv(void *handle, void *data, unsigned size)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+
+    int32_t recv = _esp->recv(socket->id, data, size);
+    if (recv == -1) {
+        return NSAPI_ERROR_WOULD_BLOCK;
+    } else if (recv < 0) {
+        return NSAPI_ERROR_NO_SOCKET;
+    } else {
+        // do nothing
+    }
+
+    return recv;
+}
+
+int ESP32Stack::socket_sendto(void *handle, const SocketAddress &addr, const void *data, unsigned size)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+
+    if (socket->connected && socket->addr != addr) {
+        if (!_esp->close(socket->id, socket->accept_id)) {
+            return NSAPI_ERROR_DEVICE_ERROR;
+        }
+        socket->connected = false;
+    }
+
+    if (!socket->connected) {
+        int err = socket_connect(socket, addr);
+        if (err < 0) {
+            return err;
+        }
+        socket->addr = addr;
+    }
+    
+    return socket_send(socket, data, size);
+}
+
+int ESP32Stack::socket_recvfrom(void *handle, SocketAddress *addr, void *data, unsigned size)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+    int ret = socket_recv(socket, data, size);
+    if (ret >= 0 && addr) {
+        *addr = socket->addr;
+    }
+
+    return ret;
+}
+
+void ESP32Stack::socket_attach(void *handle, void (*callback)(void *), void *data)
+{
+    struct esp32_socket *socket = (struct esp32_socket *)handle;
+    _esp->attach(socket->id, callback, data);
+}
+