NetworkSocketAPI / LWIPInterface

Implementation of the NetworkSocketAPI for LWIP

Dependencies:   lwip-eth lwip-sys lwip

Dependents:   HelloLWIPInterface HelloLWIPInterfaceNonBlocking LWIPInterfaceTests SimpleHTTPExample ... more

LWIPInterface.cpp@11:82796df87b0a, 2016-04-01 (annotated)

Committer:
geky
Date:
Fri Apr 01 17:18:39 2016 +0000
Revision:
11:82796df87b0a
Parent:
8:cef01e812975
Child:
12:899403b675fe
Updated NSAPI

Who changed what in which revision?

UserRevisionLine numberNew contents of line
geky 1:2fbcfc9c12dd 1 /* LWIP implementation of NetworkInterfaceAPI
geky 1:2fbcfc9c12dd 2 * Copyright (c) 2015 ARM Limited
geky 1:2fbcfc9c12dd 3 *
geky 1:2fbcfc9c12dd 4 * Licensed under the Apache License, Version 2.0 (the "License");
geky 1:2fbcfc9c12dd 5 * you may not use this file except in compliance with the License.
geky 1:2fbcfc9c12dd 6 * You may obtain a copy of the License at
geky 1:2fbcfc9c12dd 7 *
geky 1:2fbcfc9c12dd 8 * http://www.apache.org/licenses/LICENSE-2.0
geky 1:2fbcfc9c12dd 9 *
geky 1:2fbcfc9c12dd 10 * Unless required by applicable law or agreed to in writing, software
geky 1:2fbcfc9c12dd 11 * distributed under the License is distributed on an "AS IS" BASIS,
geky 1:2fbcfc9c12dd 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
geky 1:2fbcfc9c12dd 13 * See the License for the specific language governing permissions and
geky 1:2fbcfc9c12dd 14 * limitations under the License.
geky 1:2fbcfc9c12dd 15 */
sam_grove 8:cef01e812975 16
Christopher Haster 2:7fb7e78cb17f 17 #include "LWIPInterface.h"
Christopher Haster 2:7fb7e78cb17f 18
Christopher Haster 2:7fb7e78cb17f 19 #include "mbed.h"
Christopher Haster 2:7fb7e78cb17f 20 #include "lwip/inet.h"
Christopher Haster 2:7fb7e78cb17f 21 #include "lwip/netif.h"
Christopher Haster 2:7fb7e78cb17f 22 #include "lwip/dhcp.h"
Christopher Haster 2:7fb7e78cb17f 23 #include "lwip/tcpip.h"
Christopher Haster 2:7fb7e78cb17f 24 #include "lwip/sockets.h"
Christopher Haster 2:7fb7e78cb17f 25 #include "lwip/netdb.h"
Christopher Haster 2:7fb7e78cb17f 26 #include "netif/etharp.h"
Christopher Haster 2:7fb7e78cb17f 27 #include "eth_arch.h"
Christopher Haster 2:7fb7e78cb17f 28
Christopher Haster 2:7fb7e78cb17f 29
Christopher Haster 2:7fb7e78cb17f 30 #define LWIP_TIMEOUT 15000
Christopher Haster 2:7fb7e78cb17f 31
Christopher Haster 2:7fb7e78cb17f 32
Christopher Haster 2:7fb7e78cb17f 33 /* TCP/IP and Network Interface Initialisation */
Christopher Haster 2:7fb7e78cb17f 34 static struct netif netif;
Christopher Haster 2:7fb7e78cb17f 35
geky 5:2c7d2186543c 36 static char ip_addr[NS_IP_SIZE] = "\0";
Christopher Haster 2:7fb7e78cb17f 37 static char mac_addr[NS_MAC_SIZE] = "\0";
Christopher Haster 2:7fb7e78cb17f 38
Christopher Haster 2:7fb7e78cb17f 39 static Semaphore tcpip_inited(0);
Christopher Haster 2:7fb7e78cb17f 40 static Semaphore netif_linked(0);
Christopher Haster 2:7fb7e78cb17f 41 static Semaphore netif_up(0);
Christopher Haster 2:7fb7e78cb17f 42
sam_grove 8:cef01e812975 43 static void tcpip_init_done(void *)
sam_grove 8:cef01e812975 44 {
Christopher Haster 2:7fb7e78cb17f 45 tcpip_inited.release();
Christopher Haster 2:7fb7e78cb17f 46 }
Christopher Haster 2:7fb7e78cb17f 47
sam_grove 8:cef01e812975 48 static void netif_link_callback(struct netif *netif)
sam_grove 8:cef01e812975 49 {
Christopher Haster 2:7fb7e78cb17f 50 if (netif_is_link_up(netif)) {
Christopher Haster 2:7fb7e78cb17f 51 netif_linked.release();
Christopher Haster 2:7fb7e78cb17f 52 }
Christopher Haster 2:7fb7e78cb17f 53 }
Christopher Haster 2:7fb7e78cb17f 54
sam_grove 8:cef01e812975 55 static void netif_status_callback(struct netif *netif)
sam_grove 8:cef01e812975 56 {
Christopher Haster 2:7fb7e78cb17f 57 if (netif_is_up(netif)) {
geky 5:2c7d2186543c 58 strcpy(ip_addr, inet_ntoa(netif->ip_addr));
Christopher Haster 2:7fb7e78cb17f 59 netif_up.release();
Christopher Haster 2:7fb7e78cb17f 60 }
Christopher Haster 2:7fb7e78cb17f 61 }
Christopher Haster 2:7fb7e78cb17f 62
sam_grove 8:cef01e812975 63 static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw)
sam_grove 8:cef01e812975 64 {
Christopher Haster 2:7fb7e78cb17f 65 tcpip_init(tcpip_init_done, NULL);
Christopher Haster 2:7fb7e78cb17f 66 tcpip_inited.wait();
sam_grove 8:cef01e812975 67
Christopher Haster 2:7fb7e78cb17f 68 memset((void*) &netif, 0, sizeof(netif));
Christopher Haster 2:7fb7e78cb17f 69 netif_add(&netif, ipaddr, netmask, gw, NULL, eth_arch_enetif_init, tcpip_input);
Christopher Haster 2:7fb7e78cb17f 70 netif_set_default(&netif);
sam_grove 8:cef01e812975 71
Christopher Haster 2:7fb7e78cb17f 72 netif_set_link_callback (&netif, netif_link_callback);
Christopher Haster 2:7fb7e78cb17f 73 netif_set_status_callback(&netif, netif_status_callback);
Christopher Haster 2:7fb7e78cb17f 74 }
Christopher Haster 2:7fb7e78cb17f 75
sam_grove 8:cef01e812975 76 static void set_mac_address(void)
sam_grove 8:cef01e812975 77 {
Christopher Haster 2:7fb7e78cb17f 78 #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
Christopher Haster 2:7fb7e78cb17f 79 snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", MBED_MAC_ADDR_0, MBED_MAC_ADDR_1, MBED_MAC_ADDR_2,
Christopher Haster 2:7fb7e78cb17f 80 MBED_MAC_ADDR_3, MBED_MAC_ADDR_4, MBED_MAC_ADDR_5);
Christopher Haster 2:7fb7e78cb17f 81 #else
Christopher Haster 2:7fb7e78cb17f 82 char mac[6];
Christopher Haster 2:7fb7e78cb17f 83 mbed_mac_address(mac);
Christopher Haster 2:7fb7e78cb17f 84 snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
Christopher Haster 2:7fb7e78cb17f 85 #endif
Christopher Haster 2:7fb7e78cb17f 86 }
Christopher Haster 2:7fb7e78cb17f 87
Christopher Haster 2:7fb7e78cb17f 88
Christopher Haster 2:7fb7e78cb17f 89 // LWIPInterface implementation
Christopher Haster 2:7fb7e78cb17f 90 int32_t LWIPInterface::connect()
Christopher Haster 2:7fb7e78cb17f 91 {
Christopher Haster 2:7fb7e78cb17f 92 // Set up network
Christopher Haster 2:7fb7e78cb17f 93 set_mac_address();
geky 5:2c7d2186543c 94 init_netif(0, 0, 0);
Christopher Haster 2:7fb7e78cb17f 95
Christopher Haster 2:7fb7e78cb17f 96 // Connect to network
Christopher Haster 2:7fb7e78cb17f 97 eth_arch_enable_interrupts();
Christopher Haster 2:7fb7e78cb17f 98
geky 5:2c7d2186543c 99 dhcp_start(&netif);
sam_grove 8:cef01e812975 100
geky 5:2c7d2186543c 101 // Wait for an IP Address
geky 5:2c7d2186543c 102 // -1: error, 0: timeout
geky 5:2c7d2186543c 103 if (netif_up.wait(LWIP_TIMEOUT) < 0) {
geky 5:2c7d2186543c 104 return NS_ERROR_TIMEOUT;
Christopher Haster 2:7fb7e78cb17f 105 }
Christopher Haster 2:7fb7e78cb17f 106
Christopher Haster 2:7fb7e78cb17f 107 return 0;
Christopher Haster 2:7fb7e78cb17f 108 }
Christopher Haster 2:7fb7e78cb17f 109
Christopher Haster 2:7fb7e78cb17f 110 int32_t LWIPInterface::disconnect()
Christopher Haster 2:7fb7e78cb17f 111 {
geky 5:2c7d2186543c 112 dhcp_release(&netif);
geky 5:2c7d2186543c 113 dhcp_stop(&netif);
sam_grove 8:cef01e812975 114
Christopher Haster 2:7fb7e78cb17f 115 eth_arch_disable_interrupts();
sam_grove 8:cef01e812975 116
Christopher Haster 2:7fb7e78cb17f 117 return 0;
Christopher Haster 2:7fb7e78cb17f 118 }
Christopher Haster 2:7fb7e78cb17f 119
geky 5:2c7d2186543c 120 const char *LWIPInterface::getIPAddress()
geky 5:2c7d2186543c 121 {
geky 5:2c7d2186543c 122 return ip_addr;
geky 5:2c7d2186543c 123 }
geky 5:2c7d2186543c 124
sam_grove 8:cef01e812975 125 const char *LWIPInterface::getMACAddress()
Christopher Haster 2:7fb7e78cb17f 126 {
Christopher Haster 2:7fb7e78cb17f 127 return mac_addr;
Christopher Haster 2:7fb7e78cb17f 128 }
Christopher Haster 2:7fb7e78cb17f 129
geky 3:774869068511 130 SocketInterface *LWIPInterface::createSocket(ns_protocol_t proto)
Christopher Haster 2:7fb7e78cb17f 131 {
geky 3:774869068511 132 int type = (proto == NS_UDP) ? SOCK_DGRAM : SOCK_STREAM;
Christopher Haster 2:7fb7e78cb17f 133 int fd = lwip_socket(AF_INET, type, 0);
Christopher Haster 2:7fb7e78cb17f 134 if (fd < 0) {
Christopher Haster 2:7fb7e78cb17f 135 return 0;
Christopher Haster 2:7fb7e78cb17f 136 }
Christopher Haster 2:7fb7e78cb17f 137
Christopher Haster 2:7fb7e78cb17f 138 return new LWIPSocket(fd);
Christopher Haster 2:7fb7e78cb17f 139 }
Christopher Haster 2:7fb7e78cb17f 140
Christopher Haster 2:7fb7e78cb17f 141 void LWIPInterface::destroySocket(SocketInterface *siface)
Christopher Haster 2:7fb7e78cb17f 142 {
Christopher Haster 2:7fb7e78cb17f 143 LWIPSocket *socket = (LWIPSocket *)siface;
Christopher Haster 2:7fb7e78cb17f 144 lwip_close(socket->fd);
Christopher Haster 2:7fb7e78cb17f 145
Christopher Haster 2:7fb7e78cb17f 146 delete socket;
Christopher Haster 2:7fb7e78cb17f 147 }
Christopher Haster 2:7fb7e78cb17f 148
Christopher Haster 2:7fb7e78cb17f 149
Christopher Haster 2:7fb7e78cb17f 150 // TCP SocketInterface implementation
geky 4:a7349bd7776c 151 int32_t LWIPInterface::LWIPSocket::open(const char *ip, uint16_t port)
Christopher Haster 2:7fb7e78cb17f 152 {
Christopher Haster 2:7fb7e78cb17f 153 struct sockaddr_in host;
Christopher Haster 2:7fb7e78cb17f 154 memset(&host, 0, sizeof host);
Christopher Haster 2:7fb7e78cb17f 155 inet_aton(ip, &host.sin_addr);
Christopher Haster 2:7fb7e78cb17f 156 host.sin_family = AF_INET;
Christopher Haster 2:7fb7e78cb17f 157 host.sin_port = htons(port);
Christopher Haster 2:7fb7e78cb17f 158
Christopher Haster 2:7fb7e78cb17f 159 if (lwip_connect(fd, (const struct sockaddr *)&host, sizeof host) < 0) {
Christopher Haster 2:7fb7e78cb17f 160 return NS_ERROR_NO_CONNECTION;
Christopher Haster 2:7fb7e78cb17f 161 }
Christopher Haster 2:7fb7e78cb17f 162
Christopher Haster 2:7fb7e78cb17f 163 return 0;
Christopher Haster 2:7fb7e78cb17f 164 }
Christopher Haster 2:7fb7e78cb17f 165
geky 4:a7349bd7776c 166 int32_t LWIPInterface::LWIPSocket::close()
Christopher Haster 2:7fb7e78cb17f 167 {
Christopher Haster 2:7fb7e78cb17f 168 return 0;
Christopher Haster 2:7fb7e78cb17f 169 }
Christopher Haster 2:7fb7e78cb17f 170
geky 4:a7349bd7776c 171 int32_t LWIPInterface::LWIPSocket::send(const void *voiddata, uint32_t size)
Christopher Haster 2:7fb7e78cb17f 172 {
Christopher Haster 2:7fb7e78cb17f 173 uint8_t *data = (uint8_t *)voiddata;
Christopher Haster 2:7fb7e78cb17f 174 uint32_t writtenLen = 0;
Christopher Haster 2:7fb7e78cb17f 175
Christopher Haster 2:7fb7e78cb17f 176 while (writtenLen < size) {
Christopher Haster 2:7fb7e78cb17f 177 int ret = lwip_send(fd, data + writtenLen, size - writtenLen, 0);
Christopher Haster 2:7fb7e78cb17f 178
Christopher Haster 2:7fb7e78cb17f 179 if (ret > 0) {
Christopher Haster 2:7fb7e78cb17f 180 writtenLen += ret;
Christopher Haster 2:7fb7e78cb17f 181 } else if (ret == 0) {
Christopher Haster 2:7fb7e78cb17f 182 return NS_ERROR_NO_CONNECTION;
Christopher Haster 2:7fb7e78cb17f 183 } else {
Christopher Haster 2:7fb7e78cb17f 184 return NS_ERROR_DEVICE_ERROR;
Christopher Haster 2:7fb7e78cb17f 185 }
Christopher Haster 2:7fb7e78cb17f 186 }
Christopher Haster 2:7fb7e78cb17f 187
geky 11:82796df87b0a 188 return writtenLen;
Christopher Haster 2:7fb7e78cb17f 189 }
Christopher Haster 2:7fb7e78cb17f 190
geky 4:a7349bd7776c 191 int32_t LWIPInterface::LWIPSocket::recv(void *data, uint32_t size)
Christopher Haster 2:7fb7e78cb17f 192 {
Christopher Haster 2:7fb7e78cb17f 193 int ret = lwip_recv(fd, data, size, MSG_DONTWAIT);
Christopher Haster 2:7fb7e78cb17f 194
Christopher Haster 2:7fb7e78cb17f 195 if (ret > 0) {
Christopher Haster 2:7fb7e78cb17f 196 return ret;
Christopher Haster 2:7fb7e78cb17f 197 } else if (ret == 0) {
Christopher Haster 2:7fb7e78cb17f 198 return NS_ERROR_NO_CONNECTION;
Christopher Haster 2:7fb7e78cb17f 199 } else if (ret == -1) {
geky 11:82796df87b0a 200 return NS_ERROR_WOULD_BLOCK;
Christopher Haster 2:7fb7e78cb17f 201 } else {
Christopher Haster 2:7fb7e78cb17f 202 return NS_ERROR_DEVICE_ERROR;
Christopher Haster 2:7fb7e78cb17f 203 }
Christopher Haster 2:7fb7e78cb17f 204 }
Christopher Haster 2:7fb7e78cb17f 205
Christopher Haster 2:7fb7e78cb17f 206