An access controller for man doors at our facility. It receives Wiegand signals from a keypad/card reader and activates a relay to open the door. Access codes are stored in EEPROM. The active code list is updated from TFTP on a local server.
Dependencies: 24LCxx_I2C CardReader USBHOST
Diff: DHCPOptions.h
- Revision:
- 0:a56239ae90c2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DHCPOptions.h Mon Sep 25 19:02:40 2017 +0000 @@ -0,0 +1,86 @@ + +#ifndef DHCPOPTIONS_H_ +#define DHCPOPTIONS_H_ + +#include <cstdint> +#include "EthernetInterface.h" +#include "NetworkStack.h" +#include "UDPSocket.h" +#include <inet.h> + +using std::uint8_t; +using std::uint16_t; +using std::uint32_t; + +#define MAC_STRING_LENGTH 17 +#define DHCP_BROADCAST_ADDRESS "255.255.255.255" +#define DHCP_SERVER_PORT 67 +#define DHCP_CLIENT_PORT 68 +#define DHCP_DEFAULT_TIMEOUT 1000 +#define DHCP_PACKET_SIZE 576 + +#define DHCP_OP_REQUEST 1 // Request op +#define DHCP_HTYPE 1 // Ethernet +#define DHCP_HLEN 6 // MAC 6 octet +#define DHCP_HOPS 0 +#define DHCP_SECS 0 +#define DHCP_FLAGS 0 +#define DHCP_CIADDR 0 +#define DHCP_YIADDR 0 +#define DHCP_SIADDR 0 +#define DHCP_GIADDR 0 +#define DHCP_MAGIC_COOKIE 0x63825363 // See, it is magic after all! +#define DHCP_PREQLIST 55 +#define DHCP_OPTION_TFTPSERVER 66 +#define DHCP_OPTION_STOP 255 + +#define DHCP_CHADDR_SIZE 16 +#define DHCP_SNAME_SIZE 64 +#define DHCP_FILE_SIZE 128 +#define DHCP_OPTIONS_SIZE 312 + +class DHCPOptions +{ +public: + DHCPOptions(EthernetInterface *stack) : m_eth(stack) {} + + /* Get DHCP Options from the server. Blocks until completion. */ + int getOptions(char* tftp_server, const char* mac_address, const uint32_t timeout = DHCP_DEFAULT_TIMEOUT); //Blocking + +private: + EthernetInterface *m_eth; + UDPSocket m_sock; + + struct DHCPPacket + { + uint8_t op; + uint8_t htype; + uint8_t hlen; + uint8_t hops; + uint32_t xid; + uint16_t secs; + uint16_t flags; + uint32_t ciaddr; + uint32_t yiaddr; + uint32_t siaddr; + uint32_t giaddr; + char chaddr[DHCP_CHADDR_SIZE]; + char sname[DHCP_SNAME_SIZE]; + char file[DHCP_FILE_SIZE]; + + //Options + uint32_t magic; // magic cookie + uint8_t op_mtype; // message type + uint8_t mtype_len; + uint8_t mtype; + char options[DHCP_OPTIONS_SIZE]; + + } __attribute__ ((packed)); + + int decodeOptions(char* tftp_server, DHCPPacket& pkt); + int macStrToBin(char* macBin, const char* macStr); + unsigned char charToNum(const char input); +}; + +#endif /* DHCPOPTIONS_H_ */ +