mbed IP library over Ethernet

Dependencies:   Socket lwip-eth lwip-sys lwip

Dependents:   mURI_HTTPserver

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EthernetInterface.cpp

00001 /* EthernetInterface.cpp */
00002 /* Copyright (C) 2012 mbed.org, MIT License
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00005  * and associated documentation files (the "Software"), to deal in the Software without restriction,
00006  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
00007  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
00008  * furnished to do so, subject to the following conditions:
00009  *
00010  * The above copyright notice and this permission notice shall be included in all copies or
00011  * substantial portions of the Software.
00012  *
00013  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00014  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00015  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00016  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00017  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00018  */
00019 #include "EthernetInterface.h"
00020 
00021 #include "lwip/inet.h"
00022 #include "lwip/netif.h"
00023 #include "netif/etharp.h"
00024 #include "lwip/dhcp.h"
00025 #include "arch/lpc17_emac.h"
00026 #include "lpc_phy.h"
00027 #include "lwip/tcpip.h"
00028 
00029 #include "mbed.h"
00030 
00031 /* TCP/IP and Network Interface Initialisation */
00032 static struct netif lpcNetif;
00033 
00034 static char mac_addr[19];
00035 static char ip_addr[17] = "\0";
00036 static char gateway[17] = "\0";
00037 static char networkmask[17] = "\0";
00038 static bool use_dhcp = false;
00039 
00040 static Semaphore tcpip_inited(0);
00041 static Semaphore netif_linked(0);
00042 static Semaphore netif_up(0);
00043 
00044 static void tcpip_init_done(void *arg) {
00045     tcpip_inited.release();
00046 }
00047 
00048 static void netif_link_callback(struct netif *netif) {
00049     if (netif_is_link_up(netif)) {
00050         netif_linked.release();
00051     }
00052 }
00053 
00054 static void netif_status_callback(struct netif *netif) {
00055     if (netif_is_up(netif)) {
00056         strcpy(ip_addr, inet_ntoa(netif->ip_addr));
00057         strcpy(gateway, inet_ntoa(netif->gw));
00058         strcpy(networkmask, inet_ntoa(netif->netmask));
00059         netif_up.release();
00060     }
00061 }
00062 
00063 static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) {
00064     tcpip_init(tcpip_init_done, NULL);
00065     tcpip_inited.wait();
00066     
00067     memset((void*) &lpcNetif, 0, sizeof(lpcNetif));
00068     netif_add(&lpcNetif, ipaddr, netmask, gw, NULL, lpc_enetif_init, tcpip_input);
00069     netif_set_default(&lpcNetif);
00070     
00071     netif_set_link_callback  (&lpcNetif, netif_link_callback);
00072     netif_set_status_callback(&lpcNetif, netif_status_callback);
00073 }
00074 
00075 static void set_mac_address(void) {
00076 #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
00077     snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", MBED_MAC_ADDR_0, MBED_MAC_ADDR_1, MBED_MAC_ADDR_2,
00078              MBED_MAC_ADDR_3, MBED_MAC_ADDR_4, MBED_MAC_ADDR_5);
00079 #else
00080     char mac[6];
00081     mbed_mac_address(mac);
00082     snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
00083 #endif
00084 }
00085 
00086 int EthernetInterface::init() {
00087     use_dhcp = true;
00088     set_mac_address();
00089     init_netif(NULL, NULL, NULL);
00090     return 0;
00091 }
00092 
00093 int EthernetInterface::init(const char* ip, const char* mask, const char* gateway) {
00094     use_dhcp = false;
00095     
00096     set_mac_address();
00097     strcpy(ip_addr, ip);
00098     
00099     ip_addr_t ip_n, mask_n, gateway_n;
00100     inet_aton(ip, &ip_n);
00101     inet_aton(mask, &mask_n);
00102     inet_aton(gateway, &gateway_n);
00103     init_netif(&ip_n, &mask_n, &gateway_n);
00104     
00105     return 0;
00106 }
00107 
00108 int EthernetInterface::connect(unsigned int timeout_ms) {
00109     NVIC_SetPriority(ENET_IRQn, ((0x01 << 3) | 0x01));
00110     NVIC_EnableIRQ(ENET_IRQn);
00111     
00112     int inited;
00113     if (use_dhcp) {
00114         dhcp_start(&lpcNetif);
00115         
00116         // Wait for an IP Address
00117         // -1: error, 0: timeout
00118         inited = netif_up.wait(timeout_ms);
00119     } else {
00120         netif_set_up(&lpcNetif);
00121         
00122         // Wait for the link up
00123         inited = netif_linked.wait(timeout_ms);
00124     }
00125     
00126     return (inited > 0) ? (0) : (-1);
00127 }
00128 
00129 int EthernetInterface::disconnect() {
00130     if (use_dhcp) {
00131         dhcp_release(&lpcNetif);
00132         dhcp_stop(&lpcNetif);
00133     } else {
00134         netif_set_down(&lpcNetif);
00135     }
00136     
00137     NVIC_DisableIRQ(ENET_IRQn);
00138     
00139     return 0;
00140 }
00141 
00142 char* EthernetInterface::getMACAddress() {
00143     return mac_addr;
00144 }
00145 
00146 char* EthernetInterface::getIPAddress() {
00147     return ip_addr;
00148 }
00149 
00150 char* EthernetInterface::getGateway() {
00151     return gateway;
00152 }
00153 
00154 char* EthernetInterface::getNetworkMask() {
00155     return networkmask;
00156 }
00157 
00158