mirror of https://github.com/ARMmbed/mbed-os.git
207 lines
4.7 KiB
C++
207 lines
4.7 KiB
C++
/* LWIP implementation of NetworkInterfaceAPI
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* Copyright (c) 2015 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "LWIPInterface.h"
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#include "mbed.h"
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#include "lwip/inet.h"
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#include "lwip/netif.h"
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#include "lwip/dhcp.h"
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#include "lwip/tcpip.h"
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#include "lwip/sockets.h"
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#include "lwip/netdb.h"
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#include "netif/etharp.h"
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#include "eth_arch.h"
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#define LWIP_TIMEOUT 15000
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/* TCP/IP and Network Interface Initialisation */
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static struct netif netif;
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static char ip_addr[NS_IP_SIZE] = "\0";
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static char mac_addr[NS_MAC_SIZE] = "\0";
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static Semaphore tcpip_inited(0);
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static Semaphore netif_linked(0);
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static Semaphore netif_up(0);
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static void tcpip_init_done(void *)
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{
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tcpip_inited.release();
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}
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static void netif_link_callback(struct netif *netif)
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{
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if (netif_is_link_up(netif)) {
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netif_linked.release();
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}
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}
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static void netif_status_callback(struct netif *netif)
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{
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if (netif_is_up(netif)) {
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strcpy(ip_addr, inet_ntoa(netif->ip_addr));
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netif_up.release();
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}
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}
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static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw)
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{
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tcpip_init(tcpip_init_done, NULL);
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tcpip_inited.wait();
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memset((void*) &netif, 0, sizeof(netif));
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netif_add(&netif, ipaddr, netmask, gw, NULL, eth_arch_enetif_init, tcpip_input);
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netif_set_default(&netif);
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netif_set_link_callback (&netif, netif_link_callback);
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netif_set_status_callback(&netif, netif_status_callback);
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}
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static void set_mac_address(void)
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{
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#if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
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snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", MBED_MAC_ADDR_0, MBED_MAC_ADDR_1, MBED_MAC_ADDR_2,
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MBED_MAC_ADDR_3, MBED_MAC_ADDR_4, MBED_MAC_ADDR_5);
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#else
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char mac[6];
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mbed_mac_address(mac);
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snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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#endif
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}
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// LWIPInterface implementation
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int32_t LWIPInterface::connect()
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{
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// Set up network
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set_mac_address();
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init_netif(0, 0, 0);
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// Connect to network
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eth_arch_enable_interrupts();
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dhcp_start(&netif);
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// Wait for an IP Address
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// -1: error, 0: timeout
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if (netif_up.wait(LWIP_TIMEOUT) < 0) {
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return NS_ERROR_TIMEOUT;
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}
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return 0;
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}
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int32_t LWIPInterface::disconnect()
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{
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dhcp_release(&netif);
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dhcp_stop(&netif);
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eth_arch_disable_interrupts();
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return 0;
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}
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const char *LWIPInterface::getIPAddress()
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{
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return ip_addr;
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}
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const char *LWIPInterface::getMACAddress()
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{
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return mac_addr;
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}
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SocketInterface *LWIPInterface::createSocket(ns_protocol_t proto)
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{
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int type = (proto == NS_UDP) ? SOCK_DGRAM : SOCK_STREAM;
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int fd = lwip_socket(AF_INET, type, 0);
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if (fd < 0) {
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return 0;
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}
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return new LWIPSocket(fd);
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}
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void LWIPInterface::destroySocket(SocketInterface *siface)
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{
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LWIPSocket *socket = (LWIPSocket *)siface;
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lwip_close(socket->fd);
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delete socket;
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}
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// TCP SocketInterface implementation
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int32_t LWIPInterface::LWIPSocket::open(const char *ip, uint16_t port)
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{
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struct sockaddr_in host;
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memset(&host, 0, sizeof host);
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inet_aton(ip, &host.sin_addr);
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host.sin_family = AF_INET;
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host.sin_port = htons(port);
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if (lwip_connect(fd, (const struct sockaddr *)&host, sizeof host) < 0) {
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return NS_ERROR_NO_CONNECTION;
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}
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return 0;
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}
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int32_t LWIPInterface::LWIPSocket::close()
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{
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return 0;
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}
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int32_t LWIPInterface::LWIPSocket::send(const void *voiddata, uint32_t size)
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{
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uint8_t *data = (uint8_t *)voiddata;
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uint32_t writtenLen = 0;
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while (writtenLen < size) {
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int ret = lwip_send(fd, data + writtenLen, size - writtenLen, 0);
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if (ret > 0) {
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writtenLen += ret;
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} else if (ret == 0) {
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return NS_ERROR_NO_CONNECTION;
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} else {
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return NS_ERROR_DEVICE_ERROR;
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}
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}
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return writtenLen;
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}
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int32_t LWIPInterface::LWIPSocket::recv(void *data, uint32_t size)
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{
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int ret = lwip_recv(fd, data, size, MSG_DONTWAIT);
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if (ret > 0) {
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return ret;
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} else if (ret == 0) {
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return NS_ERROR_NO_CONNECTION;
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} else if (ret == -1) {
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return NS_ERROR_WOULD_BLOCK;
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} else {
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return NS_ERROR_DEVICE_ERROR;
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}
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}
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