DHCPClient.h

00001 // DHCPClient.h 2012/4/21
00002 #ifndef DHCPCLIENT_H
00003 #define DHCPCLIENT_H
00004 #include "UDPSocket.h"
00005 
00006 
00007 #define DHCP_OFFSET_OP 0
00008 #define DHCP_OFFSET_XID 4
00009 #define DHCP_OFFSET_YIADDR 16
00010 #define DHCP_OFFSET_CHADDR 28
00011 #define DHCP_OFFSET_MAGIC_COOKIE 236
00012 #define DHCP_OFFSET_OPTIONS 240
00013 #define DHCP_MAX_PACKET_SIZE 600
00014 
00015 class DHCPClient {
00016     int discover(uint8_t buf[], int size);
00017     int request(uint8_t buf[], int size);
00018     int offer_ack(uint8_t buf[], int size);
00019     bool verify(uint8_t buf[], int len);
00020 public:
00021     void callback(UDPSocketEvent e);
00022     int setup(int timeout_ms = 15000);
00023     DHCPClient();
00024     uint8_t chaddr[6]; // MAC
00025     uint8_t yiaddr[4]; // IP
00026     uint8_t dnsaddr[4]; // DNS
00027     uint8_t gateway[4];
00028     uint8_t netmask[4];
00029 private:
00030     UDPSocket* m_udp;
00031     uint8_t xid[4];
00032     bool exit_flag;
00033     Timer m_interval;
00034     int m_retry;
00035 };
00036 #endif //DHCPCLIENT_H