Diff: features/netsocket/NetworkStack.cpp

Revision:

0:38ceb79fef03

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/netsocket/NetworkStack.cpp	Wed Nov 28 15:10:15 2018 +0000
@@ -0,0 +1,368 @@
+/* Socket
+ * Copyright (c) 2015 ARM Limited
+ *
+ * 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 "NetworkStack.h"
+#include "nsapi_dns.h"
+#include "mbed.h"
+#include "stddef.h"
+#include <new>
+
+// Default NetworkStack operations
+const char *NetworkStack::get_ip_address()
+{
+    return 0;
+
+}
+nsapi_error_t NetworkStack::gethostbyname(const char *name, SocketAddress *address, nsapi_version_t version)
+{
+    if (name[0] == '\0') {
+        return NSAPI_ERROR_PARAMETER;
+    }
+
+    // check for simple ip addresses
+    if (address->set_ip_address(name)) {
+        if (version != NSAPI_UNSPEC && address->get_ip_version() != version) {
+            return NSAPI_ERROR_DNS_FAILURE;
+        }
+
+        return NSAPI_ERROR_OK;
+    }
+
+    // if the version is unspecified, try to guess the version from the
+    // ip address of the underlying stack
+    if (version == NSAPI_UNSPEC) {
+        SocketAddress testaddress;
+        if (testaddress.set_ip_address(this->get_ip_address())) {
+            version = testaddress.get_ip_version();
+        }
+    }
+
+    return nsapi_dns_query(this, name, address, version);
+}
+
+nsapi_value_or_error_t NetworkStack::gethostbyname_async(const char *name, hostbyname_cb_t callback, nsapi_version_t version)
+{
+    SocketAddress address;
+
+    if (name[0] == '\0') {
+        return NSAPI_ERROR_PARAMETER;
+    }
+
+    // check for simple ip addresses
+    if (address.set_ip_address(name)) {
+        if (version != NSAPI_UNSPEC && address.get_ip_version() != version) {
+            return NSAPI_ERROR_DNS_FAILURE;
+        }
+
+        callback(NSAPI_ERROR_OK, &address);
+        return NSAPI_ERROR_OK;
+    }
+
+    // if the version is unspecified, try to guess the version from the
+    // ip address of the underlying stack
+    if (version == NSAPI_UNSPEC) {
+        SocketAddress testaddress;
+        if (testaddress.set_ip_address(this->get_ip_address())) {
+            version = testaddress.get_ip_version();
+        }
+    }
+
+    call_in_callback_cb_t call_in_cb = get_call_in_callback();
+
+    return nsapi_dns_query_async(this, name, callback, call_in_cb, version);
+}
+
+nsapi_error_t NetworkStack::gethostbyname_async_cancel(int id)
+{
+    return nsapi_dns_query_async_cancel(id);
+}
+
+nsapi_error_t NetworkStack::add_dns_server(const SocketAddress &address)
+{
+    return nsapi_dns_add_server(address);
+}
+
+nsapi_error_t NetworkStack::get_dns_server(int index, SocketAddress *address)
+{
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
+nsapi_error_t NetworkStack::setstackopt(int level, int optname, const void *optval, unsigned optlen)
+{
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
+nsapi_error_t NetworkStack::getstackopt(int level, int optname, void *optval, unsigned *optlen)
+{
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
+nsapi_error_t NetworkStack::setsockopt(void *handle, int level, int optname, const void *optval, unsigned optlen)
+{
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
+nsapi_error_t NetworkStack::getsockopt(void *handle, int level, int optname, void *optval, unsigned *optlen)
+{
+    return NSAPI_ERROR_UNSUPPORTED;
+}
+
+nsapi_error_t NetworkStack::call_in(int delay, mbed::Callback<void()> func)
+{
+    static events::EventQueue *event_queue = mbed::mbed_event_queue();
+
+    if (!event_queue) {
+        return NSAPI_ERROR_NO_MEMORY;
+    }
+
+    if (delay > 0) {
+        if (event_queue->call_in(delay, func) == 0) {
+            return NSAPI_ERROR_NO_MEMORY;
+        }
+    } else {
+        if (event_queue->call(func) == 0) {
+            return NSAPI_ERROR_NO_MEMORY;
+        }
+    }
+
+    return NSAPI_ERROR_OK;
+}
+
+call_in_callback_cb_t NetworkStack::get_call_in_callback()
+{
+    call_in_callback_cb_t cb(this, &NetworkStack::call_in);
+    return cb;
+}
+
+// NetworkStackWrapper class for encapsulating the raw nsapi_stack structure
+class NetworkStackWrapper : public NetworkStack {
+private:
+    inline nsapi_stack_t *_stack()
+    {
+        return reinterpret_cast<nsapi_stack_t *>(
+                   reinterpret_cast<uint8_t *>(this)
+                   - offsetof(nsapi_stack_t, _stack_buffer));
+    }
+
+    inline const nsapi_stack_api_t *_stack_api()
+    {
+        return _stack()->stack_api;
+    }
+
+public:
+    virtual const char *get_ip_address()
+    {
+        if (!_stack_api()->get_ip_address) {
+            return 0;
+        }
+
+        static uint8_t buffer[sizeof(SocketAddress)];
+        SocketAddress *address = new (buffer) SocketAddress(_stack_api()->get_ip_address(_stack()));
+        return address->get_ip_address();
+    }
+
+    virtual nsapi_error_t gethostbyname(const char *name, SocketAddress *address, nsapi_version_t version)
+    {
+        if (!_stack_api()->gethostbyname) {
+            return NetworkStack::gethostbyname(name, address, version);
+        }
+
+        nsapi_addr_t addr = {NSAPI_UNSPEC, 0};
+        nsapi_error_t err = _stack_api()->gethostbyname(_stack(), name, &addr, version);
+        address->set_addr(addr);
+        return err;
+    }
+
+    virtual nsapi_error_t add_dns_server(const SocketAddress &address)
+    {
+        if (!_stack_api()->add_dns_server) {
+            return NetworkStack::add_dns_server(address);
+        }
+
+        return _stack_api()->add_dns_server(_stack(), address.get_addr());
+    }
+
+    virtual nsapi_error_t setstackopt(int level, int optname, const void *optval, unsigned optlen)
+    {
+        if (!_stack_api()->setstackopt) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->setstackopt(_stack(), level, optname, optval, optlen);
+    }
+
+    virtual nsapi_error_t getstackopt(int level, int optname, void *optval, unsigned *optlen)
+    {
+        if (!_stack_api()->getstackopt) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->getstackopt(_stack(), level, optname, optval, optlen);
+    }
+
+protected:
+    virtual nsapi_error_t socket_open(nsapi_socket_t *socket, nsapi_protocol_t proto)
+    {
+        if (!_stack_api()->socket_open) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_open(_stack(), socket, proto);
+    }
+
+    virtual nsapi_error_t socket_close(nsapi_socket_t socket)
+    {
+        if (!_stack_api()->socket_close) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_close(_stack(), socket);
+    }
+
+    virtual nsapi_error_t socket_bind(nsapi_socket_t socket, const SocketAddress &address)
+    {
+        if (!_stack_api()->socket_bind) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_bind(_stack(), socket, address.get_addr(), address.get_port());
+    }
+
+    virtual nsapi_error_t socket_listen(nsapi_socket_t socket, int backlog)
+    {
+        if (!_stack_api()->socket_listen) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_listen(_stack(), socket, backlog);
+    }
+
+    virtual nsapi_error_t socket_connect(nsapi_socket_t socket, const SocketAddress &address)
+    {
+        if (!_stack_api()->socket_connect) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_connect(_stack(), socket, address.get_addr(), address.get_port());
+    }
+
+    virtual nsapi_error_t socket_accept(nsapi_socket_t server, nsapi_socket_t *socket, SocketAddress *address)
+    {
+        if (!_stack_api()->socket_accept) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        nsapi_addr_t addr = {NSAPI_IPv4, 0};
+        uint16_t port = 0;
+
+        nsapi_error_t err = _stack_api()->socket_accept(_stack(), server, socket, &addr, &port);
+
+        if (address) {
+            address->set_addr(addr);
+            address->set_port(port);
+        }
+
+        return err;
+    }
+
+    virtual nsapi_size_or_error_t socket_send(nsapi_socket_t socket, const void *data, nsapi_size_t size)
+    {
+        if (!_stack_api()->socket_send) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_send(_stack(), socket, data, size);
+    }
+
+    virtual nsapi_size_or_error_t socket_recv(nsapi_socket_t socket, void *data, nsapi_size_t size)
+    {
+        if (!_stack_api()->socket_recv) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_recv(_stack(), socket, data, size);
+    }
+
+    virtual nsapi_size_or_error_t socket_sendto(nsapi_socket_t socket, const SocketAddress &address, const void *data, nsapi_size_t size)
+    {
+        if (!_stack_api()->socket_sendto) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->socket_sendto(_stack(), socket, address.get_addr(), address.get_port(), data, size);
+    }
+
+    virtual nsapi_size_or_error_t socket_recvfrom(nsapi_socket_t socket, SocketAddress *address, void *data, nsapi_size_t size)
+    {
+        if (!_stack_api()->socket_recvfrom) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        nsapi_addr_t addr = {NSAPI_IPv4, 0};
+        uint16_t port = 0;
+
+        nsapi_size_or_error_t err = _stack_api()->socket_recvfrom(_stack(), socket, &addr, &port, data, size);
+
+        if (address) {
+            address->set_addr(addr);
+            address->set_port(port);
+        }
+
+        return err;
+    }
+
+    virtual void socket_attach(nsapi_socket_t socket, void (*callback)(void *), void *data)
+    {
+        if (!_stack_api()->socket_attach) {
+            return;
+        }
+
+        return _stack_api()->socket_attach(_stack(), socket, callback, data);
+    }
+
+    virtual nsapi_error_t setsockopt(nsapi_socket_t socket, int level, int optname, const void *optval, unsigned optlen)
+    {
+        if (!_stack_api()->setsockopt) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->setsockopt(_stack(), socket, level, optname, optval, optlen);
+    }
+
+    virtual nsapi_error_t getsockopt(nsapi_socket_t socket, int level, int optname, void *optval, unsigned *optlen)
+    {
+        if (!_stack_api()->getsockopt) {
+            return NSAPI_ERROR_UNSUPPORTED;
+        }
+
+        return _stack_api()->getsockopt(_stack(), socket, level, optname, optval, optlen);
+    }
+};
+
+
+// Conversion function for network stacks
+NetworkStack *nsapi_create_stack(nsapi_stack_t *stack)
+{
+    MBED_STATIC_ASSERT(sizeof stack->_stack_buffer >= sizeof(NetworkStackWrapper),
+                       "The nsapi_stack_t stack buffer must fit a NetworkStackWrapper");
+    return new (stack->_stack_buffer) NetworkStackWrapper;
+}
+
+NetworkStack *nsapi_create_stack(NetworkStack *stack)
+{
+    return stack;
+}
+