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。
DhcpServer.cpp
- Committer:
- dkato
- Date:
- 2016-03-25
- Revision:
- 0:1c2747611cab
File content as of revision 0:1c2747611cab:
#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; } }