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 "eth_arch.h"
00026 #include "lwip/tcpip.h"
00027 
00028 #include "mbed.h"
00029 
00030 /* TCP/IP and Network Interface Initialisation */
00031 static struct netif netif;
00032 
00033 static char mac_addr[19];
00034 static char ip_addr[17] = "\0";
00035 static char gateway[17] = "\0";
00036 static char networkmask[17] = "\0";
00037 static bool use_dhcp = false;
00038 
00039 static Semaphore tcpip_inited(0);
00040 static Semaphore netif_linked(0);
00041 static Semaphore netif_up(0);
00042 
00043 static void tcpip_init_done(void *arg) {
00044     tcpip_inited.release();
00045 }
00046 
00047 static void netif_link_callback(struct netif *netif) {
00048     if (netif_is_link_up(netif)) {
00049         netif_linked.release();
00050     }
00051 }
00052 
00053 static void netif_status_callback(struct netif *netif) {
00054     if (netif_is_up(netif)) {
00055         strcpy(ip_addr, inet_ntoa(netif->ip_addr));
00056         strcpy(gateway, inet_ntoa(netif->gw));
00057         strcpy(networkmask, inet_ntoa(netif->netmask));
00058         netif_up.release();
00059     }
00060 }
00061 
00062 static void init_netif(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) {
00063     tcpip_init(tcpip_init_done, NULL);
00064     tcpip_inited.wait();
00065     
00066     memset((void*) &netif, 0, sizeof(netif));
00067     netif_add(&netif, ipaddr, netmask, gw, NULL, eth_arch_enetif_init, tcpip_input);
00068     netif_set_default(&netif);
00069     
00070     netif_set_link_callback  (&netif, netif_link_callback);
00071     netif_set_status_callback(&netif, netif_status_callback);
00072 }
00073 
00074 static void set_mac_address(void) {
00075 #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
00076     snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", MBED_MAC_ADDR_0, MBED_MAC_ADDR_1, MBED_MAC_ADDR_2,
00077              MBED_MAC_ADDR_3, MBED_MAC_ADDR_4, MBED_MAC_ADDR_5);
00078 #else
00079     char mac[6];
00080     mbed_mac_address(mac);
00081     snprintf(mac_addr, 19, "%02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
00082 #endif
00083 }
00084 
00085 int EthernetInterface::init() {
00086     use_dhcp = true;
00087     set_mac_address();
00088     init_netif(NULL, NULL, NULL);
00089     return 0;
00090 }
00091 
00092 int EthernetInterface::init(const char* ip, const char* mask, const char* gateway) {
00093     use_dhcp = false;
00094     
00095     set_mac_address();
00096     strcpy(ip_addr, ip);
00097     
00098     ip_addr_t ip_n, mask_n, gateway_n;
00099     inet_aton(ip, &ip_n);
00100     inet_aton(mask, &mask_n);
00101     inet_aton(gateway, &gateway_n);
00102     init_netif(&ip_n, &mask_n, &gateway_n);
00103     
00104     return 0;
00105 }
00106 
00107 int EthernetInterface::connect(unsigned int timeout_ms) {
00108     eth_arch_enable_interrupts();
00109 
00110     int inited;
00111     if (use_dhcp) {
00112         dhcp_start(&netif);
00113         
00114         // Wait for an IP Address
00115         // -1: error, 0: timeout
00116         inited = netif_up.wait(timeout_ms);
00117     } else {
00118         netif_set_up(&netif);
00119         
00120         // Wait for the link up
00121         inited = netif_linked.wait(timeout_ms);
00122     }
00123     
00124     return (inited > 0) ? (0) : (-1);
00125 }
00126 
00127 int EthernetInterface::disconnect() {
00128     if (use_dhcp) {
00129         dhcp_release(&netif);
00130         dhcp_stop(&netif);
00131     } else {
00132         netif_set_down(&netif);
00133     }
00134     
00135     eth_arch_disable_interrupts();
00136     
00137     return 0;
00138 }
00139 
00140 char* EthernetInterface::getMACAddress() {
00141     return mac_addr;
00142 }
00143 
00144 char* EthernetInterface::getIPAddress() {
00145     return ip_addr;
00146 }
00147 
00148 char* EthernetInterface::getGateway() {
00149     return gateway;
00150 }
00151 
00152 char* EthernetInterface::getNetworkMask() {
00153     return networkmask;
00154 }
00155 
00156