sys/src/cmd/ip/dhcp.h

   1 /* Dynamic Host Configuration Protocol / BOOTP */
   2 enum
   3 {
   4         OfferTimeout=   60,             /* when an offer times out */
   5         MaxLease=       60*60,          /* longest lease for dynamic binding */
   6         MinLease=       15*60,          /* shortest lease for dynamic binding */
   7         StaticLease=    30*60,          /* lease for static binding */
   8
   9         IPUDPHDRSIZE=   28,             /* size of an IP plus UDP header */
  10         MINSUPPORTED=   576,            /* biggest IP message the client must support */
  11
  12         /* lengths of some bootp fields */
  13         Maxhwlen=       16,
  14         Maxfilelen=     128,
  15         Maxoptlen=      312-4,
  16
  17         /* bootp types */
  18         Bootrequest=    1,
  19         Bootreply=      2,
  20
  21         /* bootp flags */
  22         Fbroadcast=     1<<15,
  23
  24         /* dhcp v4 types */
  25         Discover=       1,
  26         Offer=          2,
  27         Request=        3,
  28         Decline=        4,
  29         Ack=            5,
  30         Nak=            6,
  31         Release=        7,
  32         Inform=         8,
  33
  34         /* bootp option types */
  35         OBend=                  255,
  36         OBpad=                  0,
  37         OBmask=                 1,
  38         OBtimeoff=              2,
  39         OBrouter=               3,
  40         OBtimeserver=           4,
  41         OBnameserver=           5,
  42         OBdnserver=             6,
  43         OBlogserver=            7,
  44         OBcookieserver=         8,
  45         OBlprserver=            9,
  46         OBimpressserver=        10,
  47         OBrlserver=             11,
  48         OBhostname=             12,     /* 0x0c */
  49         OBbflen=                13,
  50         OBdumpfile=             14,
  51         OBdomainname=           15,
  52         OBrootserver=           16,     /* 0x10 */
  53         OBrootpath=             17,
  54         OBextpath=              18,
  55         OBipforward=            19,
  56         OBnonlocal=             20,
  57         OBpolicyfilter=         21,
  58         OBmaxdatagram=          22,
  59         OBttl=                  23,
  60         OBpathtimeout=          24,
  61         OBpathplateau=          25,
  62         OBmtu=                  26,
  63         OBsubnetslocal=         27,
  64         OBbaddr=                28,
  65         OBdiscovermask=         29,
  66         OBsupplymask=           30,
  67         OBdiscoverrouter=       31,
  68         OBrsserver=             32,     /* 0x20 */
  69         OBstaticroutes=         33,
  70         OBtrailerencap=         34,
  71         OBarptimeout=           35,
  72         OBetherencap=           36,
  73         OBtcpttl=               37,
  74         OBtcpka=                38,
  75         OBtcpkag=               39,
  76         OBnisdomain=            40,
  77         OBniserver=             41,
  78         OBntpserver=            42,
  79         OBvendorinfo=           43,     /* 0x2b */
  80         OBnetbiosns=            44,
  81         OBnetbiosdds=           45,
  82         OBnetbiostype=          46,
  83         OBnetbiosscope=         47,
  84         OBxfontserver=          48,     /* 0x30 */
  85         OBxdispmanager=         49,
  86         OBnisplusdomain=        64,     /* 0x40 */
  87         OBnisplusserver=        65,
  88         OBhomeagent=            68,
  89         OBsmtpserver=           69,
  90         OBpop3server=           70,
  91         OBnntpserver=           71,
  92         OBwwwserver=            72,
  93         OBfingerserver=         73,
  94         OBircserver=            74,
  95         OBstserver=             75,
  96         OBstdaserver=           76,
  97
  98         /* dhcp v4 options */
  99         ODipaddr=               50,     /* 0x32 */
 100         ODlease=                51,
 101         ODoverload=             52,
 102         ODtype=                 53,     /* 0x35 */
 103         ODserverid=             54,     /* 0x36 */
 104         ODparams=               55,     /* 0x37 */
 105         ODmessage=              56,
 106         ODmaxmsg=               57,
 107         ODrenewaltime=          58,
 108         ODrebindingtime=        59,
 109         ODvendorclass=          60,
 110         ODclientid=             61,     /* 0x3d */
 111         ODtftpserver=           66,
 112         ODbootfile=             67,
 113
 114         ODdnsdomain=            119,
 115         ODclasslessroutes=      121,
 116
 117         /* plan9 vendor info options, v4 addresses only (deprecated) */
 118         OP9fsv4=                128,    /* plan9 file servers */
 119         OP9authv4=              129,    /* plan9 auth servers */
 120
 121         /* plan9 vendor info options, textual addresses, thus v4 or v6 */
 122         OP9fs=                  130,    /* plan9 file servers */
 123         OP9auth=                131,    /* plan9 auth servers */
 124         OP9ipaddr=              132,    /* client's address */
 125         OP9ipmask=              133,    /* client's subnet mask */
 126         OP9ipgw=                134,    /* client's gateway */
 127 /*      OP9dns=                 135,    /* dns servers */
 128 };
 129
 130 /* a lease that never expires */
 131 #define Lforever        ~0UL
 132
 133 /* dhcp states */
 134 enum {
 135         Sinit,
 136         Sselecting,
 137         Srequesting,
 138         Sbound,
 139         Srenewing,
 140         Srebinding,
 141 };
 142
 143 typedef struct Bootp    Bootp;
 144 struct Bootp
 145 {
 146         /* Udphdr (included because of structure alignment on the alpha) */
 147         uchar   udphdr[Udphdrsize];
 148
 149         uchar   op;                     /* opcode */
 150         uchar   htype;                  /* hardware type */
 151         uchar   hlen;                   /* hardware address len */
 152         uchar   hops;                   /* hops */
 153         uchar   xid[4];                 /* a random number */
 154         uchar   secs[2];                /* elapsed since client started booting */
 155         uchar   flags[2];
 156         uchar   ciaddr[IPv4addrlen];    /* client IP address (client tells server) */
 157         uchar   yiaddr[IPv4addrlen];    /* client IP address (server tells client) */
 158         uchar   siaddr[IPv4addrlen];    /* server IP address */
 159         uchar   giaddr[IPv4addrlen];    /* gateway IP address */
 160         uchar   chaddr[Maxhwlen];       /* client hardware address */
 161         char    sname[64];              /* server host name (optional) */
 162         char    file[Maxfilelen];       /* boot file name */
 163         uchar   optmagic[4];
 164         uchar   optdata[Maxoptlen];
 165 };