76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
#ifndef ETHERLIB_DHCP_H
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#define ETHERLIB_DHCP_H
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#include <stdint.h>
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//#include "../../eth_interface.h"
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#include "etherlib/cbd_table.h"
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#include "etherlib_options.h"
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typedef struct {
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uint8_t op; ///< Operations
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uint8_t htype; ///< Hardware type
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uint8_t hlen; ///< Hardware address length
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uint8_t hops; ///< Number of network hops
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uint32_t xid; ///< Transaction ID
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uint16_t secs; ///< Seconds elapsed since client started trying to boot
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uint16_t flags; ///< Flags
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uint32_t ciaddr; ///< Client IP address (filled in DHCPREQUEST)
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uint32_t yiaddr; ///< 'Your' client IP address
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uint32_t siaddr; ///< DHCP server IP address
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uint32_t giaddr; ///< Relay agent IP address
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uint8_t chaddr[16]; ///< Client hardware address
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char * sname; ///< Optional server host name
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char * file; ///< Boot file name
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} DhcpProps;
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/**
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* DHCP state.
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*/
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typedef enum {
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DHCP_INIT_REBOOT,
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DHCP_REBOOTING,
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DHCP_INIT,
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DHCP_REQUESTING,
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DHCP_SELECTING,
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DHCP_REBINDING,
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DHCP_BOUND,
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DHCP_RENEWING
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} DhcpFSMState;
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/**
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* DHCP id codes.
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*/
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typedef enum {
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DHCP_BOOTREQUEST = 1,
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DHCP_BOOTREPLY = 0
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} DhcpOpCode;
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#define DHCP_MIN_PACKET_SIZE (312)
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#define DHCP_CLIENT_PORT (68)
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#define DHCP_SERVER_PORT (67)
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struct EthInterface_;
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typedef struct {
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DhcpFSMState state; ///< DHCP state machine state
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void *buf; ///< Pointer to packet an allocated packet buffer
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cbd desc; ///< UDP connection block descriptor
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uint32_t tranId; ///< Transaction ID
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struct EthInterface_ *intf; ///< Pointer to corresponding Ethernet interface
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ETHLIB_OS_MTX_TYPE procMtx; ///< Mutex protecting the state machine
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} DhcpState;
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/**
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* Initiate DHCP on interface
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* @param intf interface
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*/
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void dhcp_initiate(struct EthInterface_ * intf);
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/**
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* Start DHCP operation.
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* @param s pointer to DhcpState structure
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*/
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void dhcp_start(DhcpState * s);
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#endif //ETHERLIB_DHCP_H
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