minix/include/net/gen/dhcp.h

   1 /*      net/gen/dhcp.h - DHCP packet format             Author: Kees J. Bot
   2  *                                                              1 Dec 2000
   3  */
   4
   5 #ifndef __NET__GEN__DHCP_H__
   6 #define __NET__GEN__DHCP_H__
   7
   8 typedef struct dhcp {
   9         u8_t            op;             /* Message opcode/type. */
  10         u8_t            htype;          /* Hardware address type. */
  11         u8_t            hlen;           /* Hardware address length. */
  12         u8_t            hops;           /* Hop count when relaying. */
  13         u32_t           xid;            /* Transaction ID. */
  14         u16_t           secs;           /* Seconds past since client began. */
  15         u16_t           flags;          /* Flags. */
  16         ipaddr_t        ciaddr;         /* Client IP address. */
  17         ipaddr_t        yiaddr;         /* "Your" IP address. */
  18         ipaddr_t        siaddr;         /* Boot server IP address. */
  19         ipaddr_t        giaddr;         /* Relay agent (gateway) IP address. */
  20         u8_t            chaddr[16];     /* Client hardware address. */
  21         u8_t            sname[64];      /* Server host name. */
  22         u8_t            file[128];      /* Boot file. */
  23         u32_t           magic;          /* Magic number. */
  24         u8_t            options[308];   /* Optional parameters. */
  25 } dhcp_t;
  26
  27 /* DHCP operations and stuff: */
  28 #define DHCP_BOOTREQUEST         1      /* Boot request message. */
  29 #define DHCP_BOOTREPLY           2      /* Boot reply message. */
  30 #define DHCP_HTYPE_ETH           1      /* Ethernet hardware type. */
  31 #define DHCP_HLEN_ETH            6      /* Ethernet hardware address length. */
  32 #define DHCP_FLAGS_BCAST    0x8000U     /* Reply must be broadcast to client. */
  33
  34                                         /* "Magic" first four option bytes. */
  35 #define DHCP_MAGIC      htonl(0x63825363UL)
  36
  37 /* DHCP common tags: */
  38 #define DHCP_TAG_NETMASK         1      /* Netmask. */
  39 #define DHCP_TAG_GATEWAY         3      /* Gateway list. */
  40 #define DHCP_TAG_DNS             6      /* DNS Nameserver list. */
  41 #define DHCP_TAG_HOSTNAME       12      /* Host name. */
  42 #define DHCP_TAG_DOMAIN         15      /* Domain. */
  43 #define DHCP_TAG_IPMTU          26      /* Interface MTU. */
  44
  45 /* DHCP protocol tags: */
  46 #define DHCP_TAG_REQIP          50      /* Request this IP. */
  47 #define DHCP_TAG_LEASE          51      /* Lease time requested/offered. */
  48 #define DHCP_TAG_OVERLOAD       52      /* Options continued in file/sname. */
  49 #define DHCP_TAG_TYPE           53      /* DHCP message (values below). */
  50 #define DHCP_TAG_SERVERID       54      /* Server identifier. */
  51 #define DHCP_TAG_REQPAR         55      /* Parameters requested. */
  52 #define DHCP_TAG_MESSAGE        56      /* Error message. */
  53 #define DHCP_TAG_MAXDHCP        57      /* Max DHCP packet size. */
  54 #define DHCP_TAG_RENEWAL        58      /* Time to go into renewal state. */
  55 #define DHCP_TAG_REBINDING      59      /* Time to go into rebinding state. */
  56 #define DHCP_TAG_CLASSID        60      /* Class identifier. */
  57 #define DHCP_TAG_CLIENTID       61      /* Client identifier. */
  58
  59 /* DHCP messages: */
  60 #define DHCP_DISCOVER            1      /* Locate available servers. */
  61 #define DHCP_OFFER               2      /* Parameters offered to client. */
  62 #define DHCP_REQUEST             3      /* (Re)request offered parameters. */
  63 #define DHCP_DECLINE             4      /* Client declines offer. */
  64 #define DHCP_ACK                 5      /* Server acknowlegdes request. */
  65 #define DHCP_NAK                 6      /* Server denies request. */
  66 #define DHCP_RELEASE             7      /* Client relinguishes address. */
  67 #define DHCP_INFORM              8      /* Client requests just local config. */
  68
  69 void dhcp_init(dhcp_t *_dp);
  70 int dhcp_settag(dhcp_t *_dp, int _tag, void *_data, size_t _len);
  71 int dhcp_gettag(dhcp_t *_dp, int _searchtag, u8_t **_pdata, size_t *_plen);
  72
  73 #endif /* __NET__GEN__DHCP_H__ */