Implementation of the NetworkSocketAPI for LWIP
Dependencies: lwip-eth lwip-sys lwip
Dependents: HelloLWIPInterface HelloLWIPInterfaceNonBlocking LWIPInterfaceTests SimpleHTTPExample ... more
LWIPInterface.cpp
- Committer:
- geky
- Date:
- 2016-02-29
- Revision:
- 4:a7349bd7776c
- Parent:
- 3:774869068511
- Child:
- 5:2c7d2186543c
File content as of revision 4:a7349bd7776c:
/* LWIP implementation of NetworkInterfaceAPI * 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 "LWIPInterface.h" #include "mbed.h" #include "lwip/inet.h" #include "lwip/netif.h" #include "lwip/dhcp.h" #include "lwip/tcpip.h" #include "lwip/sockets.h" #include "lwip/netdb.h" #include "netif/etharp.h" #include "eth_arch.h" #define LWIP_TIMEOUT 15000 /* TCP/IP and Network Interface Initialisation */ static LWIPInterface *iface = 0; static struct netif netif; static char mac_addr[NS_MAC_SIZE] = "\0"; static Semaphore tcpip_inited(0); static Semaphore netif_linked(0); static Semaphore netif_up(0); static void tcpip_init_done(void *) { tcpip_inited.release(); } static void netif_link_callback(struct netif *netif) { if (netif_is_link_up(netif)) { netif_linked.release(); } } static void netif_status_callback(struct netif *netif) { if (netif_is_up(netif)) { iface->setIPAddress (inet_ntoa(netif->ip_addr)); iface->setNetworkMask(inet_ntoa(netif->netmask)); iface->setGateway (inet_ntoa(netif->gw)); netif_up.release(); } } static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) { tcpip_init(tcpip_init_done, NULL); tcpip_inited.wait(); memset((void*) &netif, 0, sizeof(netif)); netif_add(&netif, ipaddr, netmask, gw, NULL, eth_arch_enetif_init, tcpip_input); netif_set_default(&netif); netif_set_link_callback (&netif, netif_link_callback); netif_set_status_callback(&netif, netif_status_callback); } static void set_mac_address(void) { #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE) snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", MBED_MAC_ADDR_0, MBED_MAC_ADDR_1, MBED_MAC_ADDR_2, MBED_MAC_ADDR_3, MBED_MAC_ADDR_4, MBED_MAC_ADDR_5); #else char mac[6]; mbed_mac_address(mac); snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); #endif } // LWIPInterface implementation int32_t LWIPInterface::connect() { // Only one instance of LWIP is currently supported if (iface) { return NS_ERROR_DEVICE_ERROR; } iface = this; // Set up network set_mac_address(); if (getDHCP()) { init_netif(0, 0, 0); } else { ip_addr_t ip_n, mask_n, gateway_n; inet_aton(getIPAddress(), &ip_n); inet_aton(getNetworkMask(), &mask_n); inet_aton(getGateway(), &gateway_n); init_netif(&ip_n, &mask_n, &gateway_n); } // Connect to network eth_arch_enable_interrupts(); if (getDHCP()) { dhcp_start(&netif); // Wait for an IP Address // -1: error, 0: timeout if (netif_up.wait(LWIP_TIMEOUT) < 0) { return NS_ERROR_TIMEOUT; } } else { netif_set_up(&netif); // Wait for the link up if (netif_linked.wait(LWIP_TIMEOUT) < 0) { return NS_ERROR_TIMEOUT; } } return 0; } int32_t LWIPInterface::disconnect() { if (getDHCP()) { dhcp_release(&netif); dhcp_stop(&netif); } else { netif_set_down(&netif); } eth_arch_disable_interrupts(); return 0; } const char *LWIPInterface::getMACAddress() { return mac_addr; } SocketInterface *LWIPInterface::createSocket(ns_protocol_t proto) { int type = (proto == NS_UDP) ? SOCK_DGRAM : SOCK_STREAM; int fd = lwip_socket(AF_INET, type, 0); if (fd < 0) { return 0; } return new LWIPSocket(fd); } void LWIPInterface::destroySocket(SocketInterface *siface) { LWIPSocket *socket = (LWIPSocket *)siface; lwip_close(socket->fd); delete socket; } // TCP SocketInterface implementation int32_t LWIPInterface::LWIPSocket::open(const char *ip, uint16_t port) { struct sockaddr_in host; memset(&host, 0, sizeof host); inet_aton(ip, &host.sin_addr); host.sin_family = AF_INET; host.sin_port = htons(port); if (lwip_connect(fd, (const struct sockaddr *)&host, sizeof host) < 0) { return NS_ERROR_NO_CONNECTION; } return 0; } int32_t LWIPInterface::LWIPSocket::close() { return 0; } int32_t LWIPInterface::LWIPSocket::send(const void *voiddata, uint32_t size) { uint8_t *data = (uint8_t *)voiddata; uint32_t writtenLen = 0; while (writtenLen < size) { int ret = lwip_send(fd, data + writtenLen, size - writtenLen, 0); if (ret > 0) { writtenLen += ret; } else if (ret == 0) { return NS_ERROR_NO_CONNECTION; } else { return NS_ERROR_DEVICE_ERROR; } } return 0; } int32_t LWIPInterface::LWIPSocket::recv(void *data, uint32_t size) { int ret = lwip_recv(fd, data, size, MSG_DONTWAIT); if (ret > 0) { return ret; } else if (ret == 0) { return NS_ERROR_NO_CONNECTION; } else if (ret == -1) { return 0; } else { return NS_ERROR_DEVICE_ERROR; } }