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- /* Dynamic Host Configuration Protocol / BOOTP */
- enum
- {
- OfferTimeout= 60, /* when an offer times out */
- MaxLease= 60*60, /* longest lease for dynamic binding */
- MinLease= 15*60, /* shortest lease for dynamic binding */
- StaticLease= 30*60, /* lease for static binding */
- IPUDPHDRSIZE= 28, /* size of an IP plus UDP header */
- MINSUPPORTED= 576, /* biggest IP message the client must support */
- /* lengths of some bootp fields */
- Maxhwlen= 16,
- Maxfilelen= 128,
- Maxoptlen= 312-4,
- /* bootp types */
- Bootrequest= 1,
- Bootreply= 2,
- /* bootp flags */
- Fbroadcast= 1<<15,
- /* dhcp v4 types */
- Discover= 1,
- Offer= 2,
- Request= 3,
- Decline= 4,
- Ack= 5,
- Nak= 6,
- Release= 7,
- Inform= 8,
- /* bootp option types */
- OBend= 255,
- OBpad= 0,
- OBmask= 1,
- OBtimeoff= 2,
- OBrouter= 3,
- OBtimeserver= 4,
- OBnameserver= 5,
- OBdnserver= 6,
- OBlogserver= 7,
- OBcookieserver= 8,
- OBlprserver= 9,
- OBimpressserver= 10,
- OBrlserver= 11,
- OBhostname= 12, /* 0xc0 */
- OBbflen= 13,
- OBdumpfile= 14,
- OBdomainname= 15,
- OBswapserver= 16, /* 0x10 */
- OBrootpath= 17,
- OBextpath= 18,
- OBipforward= 19,
- OBnonlocal= 20,
- OBpolicyfilter= 21,
- OBmaxdatagram= 22,
- OBttl= 23,
- OBpathtimeout= 24,
- OBpathplateau= 25,
- OBmtu= 26,
- OBsubnetslocal= 27,
- OBbaddr= 28,
- OBdiscovermask= 29,
- OBsupplymask= 30,
- OBdiscoverrouter= 31,
- OBrsserver= 32, /* 0x20 */
- OBstaticroutes= 33,
- OBtrailerencap= 34,
- OBarptimeout= 35,
- OBetherencap= 36,
- OBtcpttl= 37,
- OBtcpka= 38,
- OBtcpkag= 39,
- OBnisdomain= 40,
- OBniserver= 41,
- OBntpserver= 42,
- OBvendorinfo= 43, /* 0x2b */
- OBnetbiosns= 44,
- OBnetbiosdds= 45,
- OBnetbiostype= 46,
- OBnetbiosscope= 47,
- OBxfontserver= 48, /* 0x30 */
- OBxdispmanager= 49,
- OBnisplusdomain= 64, /* 0x40 */
- OBnisplusserver= 65,
- OBhomeagent= 68,
- OBsmtpserver= 69,
- OBpop3server= 70,
- OBnntpserver= 71,
- OBwwwserver= 72,
- OBfingerserver= 73,
- OBircserver= 74,
- OBstserver= 75,
- OBstdaserver= 76,
- /* dhcp v4 options */
- ODipaddr= 50, /* 0x32 */
- ODlease= 51,
- ODoverload= 52,
- ODtype= 53, /* 0x35 */
- ODserverid= 54, /* 0x36 */
- ODparams= 55, /* 0x37 */
- ODmessage= 56,
- ODmaxmsg= 57,
- ODrenewaltime= 58,
- ODrebindingtime= 59,
- ODvendorclass= 60,
- ODclientid= 61, /* 0x3d */
- ODtftpserver= 66,
- ODbootfile= 67,
- /* plan9 vendor info options */
- OP9fs= 128, /* plan9 file servers */
- OP9auth= 129, /* plan9 auth servers */
- };
- /* a lease that never expires */
- #define Lforever ~0UL
- /* dhcp states */
- enum {
- Sinit,
- Sselecting,
- Srequesting,
- Sbound,
- Srenewing,
- Srebinding,
- };
- typedef struct Bootp Bootp;
- struct Bootp
- {
- /* Udphdr (included because of structure alignment on the alpha) */
- uchar udphdr[Udphdrsize];
- uchar op; /* opcode */
- uchar htype; /* hardware type */
- uchar hlen; /* hardware address len */
- uchar hops; /* hops */
- uchar xid[4]; /* a random number */
- uchar secs[2]; /* elapsed since client started booting */
- uchar flags[2];
- uchar ciaddr[IPv4addrlen]; /* client IP address (client tells server) */
- uchar yiaddr[IPv4addrlen]; /* client IP address (server tells client) */
- uchar siaddr[IPv4addrlen]; /* server IP address */
- uchar giaddr[IPv4addrlen]; /* gateway IP address */
- uchar chaddr[Maxhwlen]; /* client hardware address */
- char sname[64]; /* server host name (optional) */
- char file[Maxfilelen]; /* boot file name */
- uchar optmagic[4];
- uchar optdata[Maxoptlen];
- };
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