mbed IP library over Ethernet with setName and setNewAddress

Dependencies:   Socket lwip-eth lwip-sys lwip

Dependents:   JRO_CR2 JRO_DDSv2 JRO_DDSv2_rev2019

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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 "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 static char myName[33];  // holds the name, when setName() is called.
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*) &netif, 0, sizeof(netif));
00068     netif_add(&netif, ipaddr, netmask, gw, NULL, eth_arch_enetif_init, tcpip_input);
00069     netif_set_default(&netif);
00070     
00071     netif_set_link_callback  (&netif, netif_link_callback);
00072     netif_set_status_callback(&netif, 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 static void set_new_addr(ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) {
00087     
00088     netif_set_addr(&netif, ipaddr, netmask, gw);
00089     
00090 }
00091 
00092 int EthernetInterface::init() {
00093     use_dhcp = true;
00094     set_mac_address();
00095     init_netif(NULL, NULL, NULL);
00096     return 0;
00097 }
00098 
00099 int EthernetInterface::init(const char* ip, const char* mask, const char* gateway) {
00100     use_dhcp = false;
00101     
00102     set_mac_address();
00103     strcpy(ip_addr, ip);
00104     
00105     ip_addr_t ip_n, mask_n, gateway_n;
00106     inet_aton(ip, &ip_n);
00107     inet_aton(mask, &mask_n);
00108     inet_aton(gateway, &gateway_n);
00109     init_netif(&ip_n, &mask_n, &gateway_n);
00110     
00111     return 0;
00112 }
00113 
00114 int EthernetInterface::setNewAddr(const char* ip, const char* mask, const char* gateway) {
00115     use_dhcp = false;
00116     
00117     strcpy(ip_addr, ip);
00118     
00119     ip_addr_t ip_n, mask_n, gateway_n;
00120     inet_aton(ip, &ip_n);
00121     inet_aton(mask, &mask_n);
00122     inet_aton(gateway, &gateway_n);
00123     set_new_addr(&ip_n, &mask_n, &gateway_n);
00124     
00125     return 0;
00126 }
00127 
00128 int EthernetInterface::setName(const char * myname) {
00129     //int i;
00130     
00131     strncpy(myName, myname, 32);
00132     myName[32] = '\0';  // be sure it is NULL terminated.
00133     // make the name 'safe'
00134     /*
00135     for (i=0; i<32 && myName[i]; i++) {
00136         if (!inRange(myName[i], '0', '9')
00137         &&  !inRange(myName[i], 'A', 'Z')
00138         &&  !inRange(myName[i], 'a', 'z'))
00139             myName[i] = '-';
00140     }
00141     */
00142     netif_set_hostname(&netif, myName);
00143     return 0;
00144 }
00145 
00146 int EthernetInterface::connect(unsigned int timeout_ms) {
00147     eth_arch_enable_interrupts();
00148 
00149     int inited;
00150     if (use_dhcp) {
00151         dhcp_start(&netif);
00152         
00153         // Wait for an IP Address
00154         // -1: error, 0: timeout
00155         inited = netif_up.wait(timeout_ms);
00156     } else {
00157         netif_set_up(&netif);
00158         
00159         // Wait for the link up
00160         inited = netif_linked.wait(timeout_ms);
00161     }
00162     
00163     return (inited > 0) ? (0) : (-1);
00164 }
00165 
00166 int EthernetInterface::disconnect() {
00167     if (use_dhcp) {
00168         dhcp_release(&netif);
00169         dhcp_stop(&netif);
00170     } else {
00171         netif_set_down(&netif);
00172     }
00173     
00174     eth_arch_disable_interrupts();
00175     
00176     return 0;
00177 }
00178 
00179 char* EthernetInterface::getMACAddress() {
00180     return mac_addr;
00181 }
00182 
00183 char* EthernetInterface::getIPAddress() {
00184     return ip_addr;
00185 }
00186 
00187 char* EthernetInterface::getGateway() {
00188     return gateway;
00189 }
00190 
00191 char* EthernetInterface::getNetworkMask() {
00192     return networkmask;
00193 }
00194 
00195