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120 lines
4 KiB
C
120 lines
4 KiB
C
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#ifndef __DHCPS_H__
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#define __DHCPS_H__
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#include "lwip/arch.h"
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#include "lwip/netif.h"
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#include "lwip/udp.h"
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#include "lwip/stats.h"
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#include "lwip/sys.h"
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#include <platform/platform_stdlib.h>
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#define IS_USE_FIXED_IP 0
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#define debug_dhcps 0
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/* dhcp server states */
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#define DHCP_SERVER_STATE_OFFER (1)
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#define DHCP_SERVER_STATE_DECLINE (2)
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#define DHCP_SERVER_STATE_ACK (3)
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#define DHCP_SERVER_STATE_NAK (4)
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#define DHCP_SERVER_STATE_IDLE (5)
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#define BOOTP_BROADCAST (0x8000)
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#define DHCP_MESSAGE_OP_REQUEST (1)
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#define DHCP_MESSAGE_OP_REPLY (2)
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#define DHCP_MESSAGE_HTYPE (1)
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#define DHCP_MESSAGE_HLEN (6)
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#define DHCP_SERVER_PORT (67)
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#define DHCP_CLIENT_PORT (68)
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#define DHCP_MESSAGE_TYPE_DISCOVER (1)
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#define DHCP_MESSAGE_TYPE_OFFER (2)
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#define DHCP_MESSAGE_TYPE_REQUEST (3)
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#define DHCP_MESSAGE_TYPE_DECLINE (4)
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#define DHCP_MESSAGE_TYPE_ACK (5)
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#define DHCP_MESSAGE_TYPE_NAK (6)
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#define DHCP_MESSAGE_TYPE_RELEASE (7)
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#define DHCP_OPTION_LENGTH_ONE (1)
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#define DHCP_OPTION_LENGTH_TWO (2)
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#define DHCP_OPTION_LENGTH_THREE (3)
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#define DHCP_OPTION_LENGTH_FOUR (4)
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#define DHCP_OPTION_CODE_SUBNET_MASK (1)
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#define DHCP_OPTION_CODE_ROUTER (3)
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#define DHCP_OPTION_CODE_DNS_SERVER (6)
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#define DHCP_OPTION_CODE_INTERFACE_MTU (26)
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#define DHCP_OPTION_CODE_BROADCAST_ADDRESS (28)
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#define DHCP_OPTION_CODE_PERFORM_ROUTER_DISCOVERY (31)
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#define DHCP_OPTION_CODE_REQUEST_IP_ADDRESS (50)
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#define DHCP_OPTION_CODE_LEASE_TIME (51)
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#define DHCP_OPTION_CODE_MSG_TYPE (53)
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#define DHCP_OPTION_CODE_SERVER_ID (54)
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#define DHCP_OPTION_CODE_REQ_LIST (55)
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#define DHCP_OPTION_CODE_END (255)
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#define IP_FREE_TO_USE (1)
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#define IP_ALREADY_IN_USE (0)
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#define HW_ADDRESS_LENGTH (6)
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/* Reference by RFC 2131 */
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struct dhcps_msg {
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uint8_t op; /* Message op code/message type. 1 = BOOTREQUEST, 2 = BOOTREPLY */
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uint8_t htype; /* Hardware address type */
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uint8_t hlen; /* Hardware address length */
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uint8_t hops; /* Client sets to zero, optionally used by relay agents
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when booting via a relay agent */
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uint8_t xid[4]; /* Transaction ID, a random number chosen by the client,
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used by the client and server to associate messages and
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responses between a client and a server */
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uint16_t secs; /* Filled in by client, seconds elapsed since client began address
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acquisition or renewal process.*/
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uint16_t flags; /* bit 0: Broadcast flag, bit 1~15:MBZ must 0*/
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uint8_t ciaddr[4]; /* Client IP address; only filled in if client is in BOUND,
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RENEW or REBINDING state and can respond to ARP requests. */
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uint8_t yiaddr[4]; /* 'your' (client) IP address */
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uint8_t siaddr[4]; /* IP address of next server to use in bootstrap;
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returned in DHCPOFFER, DHCPACK by server. */
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uint8_t giaddr[4]; /* Relay agent IP address, used in booting via a relay agent.*/
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uint8_t chaddr[16]; /* Client hardware address */
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uint8_t sname[64]; /* Optional server host name, null terminated string.*/
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uint8_t file[128]; /* Boot file name, null terminated string; "generic" name or
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null in DHCPDISCOVER, fully qualified directory-path name in DHCPOFFER.*/
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uint8_t options[312]; /* Optional parameters field. reference the RFC 2132 */
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};
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/* use this to check whether the message is dhcp related or not */
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static const uint8_t dhcp_magic_cookie[4] = {99, 130, 83, 99};
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static const uint8_t dhcp_option_lease_time_one_day[] = {0x00, 0x01, 0x51, 0x80};
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#ifdef CLASS_B_NET
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static const uint8_t dhcp_option_interface_mtu[] = {0x05, 0xDC}; // 1500
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#else
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static const uint8_t dhcp_option_interface_mtu[] = {0x02, 0x40}; // 576
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#endif
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struct table {
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uint32_t ip_range[8];
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};
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struct address_pool{
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uint32_t start;
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uint32_t end;
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};
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/* expose API */
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extern uint8_t dhcps_ip4addr_pool_start, dhcps_ip4addr_pool_end;
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void dhcps_init(struct netif * pnetif);
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void dhcps_deinit(void);
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extern struct netif *netif_default;
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#endif
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