Daiki Kato
Dhcp server sample.
Dependents: GR-PEACH_WebCamera_AP
mbedボードをDHCPサーバとして使用するためのライブラリです。mbedボードとPCを直結する際などに使用してください。
このクラスは5つのIPアドレスを割り当てられることができます。
IPアドレスの上位3バイトはサーバーアドレスと同じで、下の1バイトは、10-14が割り当てられます。
例えば、サーバーアドレスが"192.168.0.1"の場合、IPアドレスは"192.168.0.10"～"192.168.0.14"が割り当てられます。
EthernetInterfaceでconnectを実行した後に、DhcpServerを使用してください。
EthernetInterface eth;
eth.init("192.168.0.1", "255.255.255.0", "192.168.0.1");
eth.connect();
DhcpServer dhcp_server("HostName", eth.getIPAddress());
Library in Beta!
This library is in Beta.
このライブラリはβ版です。
Diff: DhcpServer.cpp
- Revision:
- 0:1c2747611cab
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DhcpServer.cpp Fri Mar 25 05:00:52 2016 +0000
@@ -0,0 +1,189 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "lwip/netif.h"
+#include "TCPSocketConnection.h"
+#include "TCPSocketServer.h"
+#include "Endpoint.h"
+#include "UDPSocket.h"
+#include "dhcp.h"
+#include "DhcpServer.h"
+
+#define CONNECT_NUM (5)
+#define IP_ADDER_START (10)
+
+#define OFS_XID (4)
+#define OFS_YIADDR (16)
+#define OFS_SIADDR (20)
+#define OFS_CHADDR (28)
+#define OFS_SNAME (44)
+#define OFS_COOKIE (236)
+#define OFS_OPTIONS (240)
+
+static char receivebuff[500];
+static char sendbuff[300] = {0};
+static UDPSocket dhcp_server;
+static Thread * dhcpThread = NULL;
+static char chaddr_tbl[CONNECT_NUM][6] = {0};
+static const char mac_no_use[6] = {0, 0, 0, 0, 0, 0};
+
+
+static void dhcp_task_static(void const *argument) {
+ Endpoint client;
+ int cnt;
+ int tbl_index;
+
+ dhcp_server.bind(67);
+ dhcp_server.set_broadcasting(true);
+
+ while (true) {
+ int n = dhcp_server.receiveFrom(client, receivebuff, sizeof(receivebuff));
+ if (n > 0) {
+ client.set_address("255.255.255.255", 68);
+
+ sendbuff[OFS_XID + 0] = receivebuff[OFS_XID + 0];
+ sendbuff[OFS_XID + 1] = receivebuff[OFS_XID + 1];
+ sendbuff[OFS_XID + 2] = receivebuff[OFS_XID + 2];
+ sendbuff[OFS_XID + 3] = receivebuff[OFS_XID + 3];
+
+ tbl_index = -1;
+ for (cnt = 0; cnt < CONNECT_NUM; cnt++) {
+ if (memcmp(&receivebuff[OFS_CHADDR], chaddr_tbl[cnt], 6) == 0) {
+ tbl_index = cnt;
+ break;
+ }
+ }
+ if (tbl_index == -1) {
+ sendbuff[OFS_YIADDR + 0] = 0;
+ sendbuff[OFS_YIADDR + 1] = 0;
+ sendbuff[OFS_YIADDR + 2] = 0;
+ sendbuff[OFS_YIADDR + 3] = 0;
+ } else {
+ sendbuff[OFS_YIADDR + 0] = sendbuff[OFS_SIADDR + 0];
+ sendbuff[OFS_YIADDR + 1] = sendbuff[OFS_SIADDR + 1];
+ sendbuff[OFS_YIADDR + 2] = sendbuff[OFS_SIADDR + 2];
+ sendbuff[OFS_YIADDR + 3] = IP_ADDER_START + tbl_index;
+ }
+
+ sendbuff[OFS_CHADDR + 0] = receivebuff[OFS_CHADDR + 0];
+ sendbuff[OFS_CHADDR + 1] = receivebuff[OFS_CHADDR + 1];
+ sendbuff[OFS_CHADDR + 2] = receivebuff[OFS_CHADDR + 2];
+ sendbuff[OFS_CHADDR + 3] = receivebuff[OFS_CHADDR + 3];
+ sendbuff[OFS_CHADDR + 4] = receivebuff[OFS_CHADDR + 4];
+ sendbuff[OFS_CHADDR + 5] = receivebuff[OFS_CHADDR + 5];
+
+ if (receivebuff[OFS_OPTIONS + 2] == DHCP_DISCOVER) {
+ sendbuff[OFS_OPTIONS + 2] = DHCP_OFFER;
+ if (tbl_index == -1) {
+ for (cnt = 0; cnt < CONNECT_NUM; cnt++) {
+ if (memcmp( chaddr_tbl[cnt], mac_no_use, 6) == 0) {
+ tbl_index = cnt;
+ break;
+ }
+ }
+ }
+ if (tbl_index != -1) {
+ chaddr_tbl[tbl_index][0] = receivebuff[OFS_CHADDR + 0];
+ chaddr_tbl[tbl_index][1] = receivebuff[OFS_CHADDR + 1];
+ chaddr_tbl[tbl_index][2] = receivebuff[OFS_CHADDR + 2];
+ chaddr_tbl[tbl_index][3] = receivebuff[OFS_CHADDR + 3];
+ chaddr_tbl[tbl_index][4] = receivebuff[OFS_CHADDR + 4];
+ chaddr_tbl[tbl_index][5] = receivebuff[OFS_CHADDR + 5];
+ sendbuff[OFS_YIADDR + 0] = sendbuff[OFS_SIADDR + 0];
+ sendbuff[OFS_YIADDR + 1] = sendbuff[OFS_SIADDR + 1];
+ sendbuff[OFS_YIADDR + 2] = sendbuff[OFS_SIADDR + 2];
+ sendbuff[OFS_YIADDR + 3] = IP_ADDER_START + tbl_index;
+ }
+ dhcp_server.sendTo(client, sendbuff, 300);
+ } else if (receivebuff[OFS_OPTIONS + 2] == DHCP_REQUEST) {
+ if (tbl_index != -1) {
+ sendbuff[OFS_OPTIONS + 2] = DHCP_ACK;
+ } else {
+ sendbuff[OFS_OPTIONS + 2] = DHCP_NAK;
+ }
+ dhcp_server.sendTo(client, sendbuff, 300);
+ } else if (receivebuff[OFS_OPTIONS + 2] == DHCP_RELEASE) {
+ if (tbl_index != -1) {
+ memset(chaddr_tbl[tbl_index], 0, 6);
+ }
+ } else {
+ // do nothing
+ }
+ }
+ }
+}
+
+DhcpServer::DhcpServer(char * name, char * ipadder) {
+ int i;
+ int len;
+ int ofs;
+
+ sscanf(ipadder, "%d.%d.%d.%d", (int *)&sendbuff[OFS_SIADDR + 0], (int *)&sendbuff[OFS_SIADDR + 1],
+ (int *)&sendbuff[OFS_SIADDR + 2], (int *)&sendbuff[OFS_SIADDR + 3]);
+
+ len = strlen(name);
+ for (i = 0; (i < len) && (i < DHCP_SNAME_LEN); i++) {
+ sendbuff[OFS_SNAME + i] = name[i];
+ }
+
+ sendbuff[0] = 0x02;
+ sendbuff[1] = 0x01;
+ sendbuff[2] = 0x06;
+ sendbuff[3] = 0x00;
+
+ sendbuff[OFS_COOKIE + 0] = 0x63;
+ sendbuff[OFS_COOKIE + 1] = 0x82;
+ sendbuff[OFS_COOKIE + 2] = 0x53;
+ sendbuff[OFS_COOKIE + 3] = 0x63;
+
+ ofs = OFS_OPTIONS;
+ sendbuff[ofs++] = DHCP_OPTION_MESSAGE_TYPE;
+ sendbuff[ofs++] = DHCP_OPTION_MESSAGE_TYPE_LEN;
+ sendbuff[ofs++] = 0;
+
+ sendbuff[ofs++] = DHCP_OPTION_SERVER_ID;
+ sendbuff[ofs++] = 0x04;
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 0];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 1];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 2];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 3];
+
+ sendbuff[ofs++] = DHCP_OPTION_LEASE_TIME;
+ sendbuff[ofs++] = 0x04;
+ sendbuff[ofs++] = 0x00;
+ sendbuff[ofs++] = 0x01;
+ sendbuff[ofs++] = 0x4e;
+ sendbuff[ofs++] = 0x20;
+
+ sendbuff[ofs++] = DHCP_OPTION_SUBNET_MASK;
+ sendbuff[ofs++] = 0x04;
+ sendbuff[ofs++] = 0xff;
+ sendbuff[ofs++] = 0xff;
+ sendbuff[ofs++] = 0xff;
+ sendbuff[ofs++] = 0xf0;
+
+ sendbuff[ofs++] = DHCP_OPTION_ROUTER;
+ sendbuff[ofs++] = 0x04;
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 0];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 1];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 2];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 3];
+
+ sendbuff[ofs++] = DHCP_OPTION_DNS_SERVER;
+ sendbuff[ofs++] = 0x04;
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 0];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 1];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 2];
+ sendbuff[ofs++] = sendbuff[OFS_SIADDR + 3];
+
+ sendbuff[ofs++] = 0xff;
+
+ if (dhcpThread == NULL) {
+ dhcpThread = new Thread(&dhcp_task_static, NULL, osPriorityNormal, (1024 * 8));
+ }
+}
+
+DhcpServer::~DhcpServer() {
+ if (dhcpThread != NULL) {
+ delete dhcpThread;
+ }
+}