i386/linux-2.3.21/include/net/dn.h

   1 #ifndef _NET_DN_H
   2 #define _NET_DN_H
   3
   4 #include <linux/dn.h>
   5 #include <asm/byteorder.h>
   6
   7 typedef unsigned short dn_address;
   8
   9 #define dn_ntohs(x) le16_to_cpu(x)
  10 #define dn_htons(x) cpu_to_le16(x)
  11
  12 struct dn_scp                                   /* Session Control Port */
  13 {
  14         unsigned char           state;
  15 #define DN_O     1                      /* Open                 */
  16 #define DN_CR    2                      /* Connect Receive      */
  17 #define DN_DR    3                      /* Disconnect Reject    */
  18 #define DN_DRC   4                      /* Discon. Rej. Complete*/
  19 #define DN_CC    5                      /* Connect Confirm      */
  20 #define DN_CI    6                      /* Connect Initiate     */
  21 #define DN_NR    7                      /* No resources         */
  22 #define DN_NC    8                      /* No communication     */
  23 #define DN_CD    9                      /* Connect Delivery     */
  24 #define DN_RJ    10                     /* Rejected             */
  25 #define DN_RUN   11                     /* Running              */
  26 #define DN_DI    12                     /* Disconnect Initiate  */
  27 #define DN_DIC   13                     /* Disconnect Complete  */
  28 #define DN_DN    14                     /* Disconnect Notificat */
  29 #define DN_CL    15                     /* Closed               */
  30 #define DN_CN    16                     /* Closed Notification  */
  31
  32         unsigned short          addrloc;
  33         unsigned short          addrrem;
  34         unsigned short          numdat;
  35         unsigned short          numoth;
  36         unsigned short          numoth_rcv;
  37         unsigned short          numdat_rcv;
  38         unsigned short          ackxmt_dat;
  39         unsigned short          ackxmt_oth;
  40         unsigned short          ackrcv_dat;
  41         unsigned short          ackrcv_oth;
  42         unsigned char           flowrem_sw;
  43         unsigned char           flowloc_sw;
  44 #define DN_SEND         2
  45 #define DN_DONTSEND     1
  46 #define DN_NOCHANGE     0
  47         unsigned char           accept_mode;
  48         unsigned short          mss;
  49         unsigned long           seg_size; /* Running total of current segment */
  50
  51         struct optdata_dn     conndata_in;
  52         struct optdata_dn     conndata_out;
  53         struct optdata_dn     discdata_in;
  54         struct optdata_dn     discdata_out;
  55         struct accessdata_dn  accessdata;
  56
  57         struct sockaddr_dn addr; /* Local address  */
  58         struct sockaddr_dn peer; /* Remote address */
  59
  60         /*
  61          * In this case the RTT estimation is not specified in the
  62          * docs, nor is any back off algorithm. Here we follow well
  63          * known tcp algorithms with a few small variations.
  64          *
  65          * snd_window: Max number of packets we send before we wait for
  66          *             an ack to come back. This will become part of a
  67          *             more complicated scheme when we support flow
  68          *             control.
  69          *
  70          * nsp_srtt:   Round-Trip-Time (x8) in jiffies. This is a rolling
  71          *             average.
  72          * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
  73          *             varience of the smoothed average (but calculated in
  74          *             a simpler way than for normal statistical varience
  75          *             calculations).
  76          *
  77          * nsp_rxtshift: Backoff counter. Value is zero normally, each time
  78          *               a packet is lost is increases by one until an ack
  79          *               is received. Its used to index an array of backoff
  80          *               multipliers.
  81          */
  82 #define NSP_MIN_WINDOW 1
  83 #define NSP_MAX_WINDOW 512
  84         unsigned long snd_window;
  85 #define NSP_INITIAL_SRTT (HZ)
  86         unsigned long nsp_srtt;
  87 #define NSP_INITIAL_RTTVAR (HZ*3)
  88         unsigned long nsp_rttvar;
  89 #define NSP_MAXRXTSHIFT 12
  90         unsigned long nsp_rxtshift;
  91
  92         /*
  93          * Output queues, one for data, one for otherdata/linkservice
  94          */
  95         struct sk_buff_head data_xmit_queue;
  96         struct sk_buff_head other_xmit_queue;
  97
  98         /*
  99          * Input queue for other data
 100          */
 101         struct sk_buff_head other_receive_queue;
 102         int other_report;
 103
 104         /*
 105          * Stuff to do with the slow timer
 106          */
 107         unsigned long stamp;          /* time of last transmit */
 108         unsigned long persist;
 109         int (*persist_fxn)(struct sock *sk);
 110         unsigned long keepalive;
 111         void (*keepalive_fxn)(struct sock *sk);
 112
 113         /*
 114          * This stuff is for the fast timer for delayed acks
 115          */
 116         struct timer_list delack_timer;
 117         int delack_pending;
 118         void (*delack_fxn)(struct sock *sk);
 119 };
 120
 121 /*
 122  * src,dst : Source and Destination DECnet addresses
 123  * neigh: Address from which we've just got this skb.
 124  * hops : Number of hops through the network
 125  * dst_port, src_port : NSP port numbers
 126  * services, info : Useful data extracted from conninit messages
 127  * rt_flags : Routing flags byte
 128  * nsp_flags : NSP layer flags byte
 129  * segsize : Size of segment
 130  * segnum : Number, for data, otherdata and linkservice
 131  * xmit_count : Number of times we've transmitted this skb
 132  * stamp : Time stamp of first transmission, used in RTT calculations
 133  * iif: Input interface number
 134  *
 135  * As a general policy, this structure keeps all addresses in network
 136  * byte order, and all else in host byte order. Thus dst, src, dst_port
 137  * src_port and neigh are in network order. All else is in host order.
 138  *
 139  */
 140 struct dn_skb_cb {
 141         unsigned short dst;
 142         unsigned short src;
 143         unsigned short neigh;
 144         unsigned short hops;
 145         unsigned short dst_port;
 146         unsigned short src_port;
 147         unsigned char services;
 148         unsigned char info;
 149         unsigned char rt_flags;
 150         unsigned char nsp_flags;
 151         unsigned short segsize;
 152         unsigned short segnum;
 153         unsigned short xmit_count;
 154         unsigned long stamp;
 155         int iif;
 156 };
 157
 158 static __inline__ dn_address dn_eth2dn(unsigned char *ethaddr)
 159 {
 160         return ethaddr[4] | (ethaddr[5] << 8);
 161 }
 162
 163 static __inline__ dn_address dn_saddr2dn(struct sockaddr_dn *saddr)
 164 {
 165         return *(dn_address *)saddr->sdn_nodeaddr;
 166 }
 167
 168 static __inline__ void dn_dn2eth(unsigned char *ethaddr, dn_address addr)
 169 {
 170         ethaddr[0] = 0xAA;
 171         ethaddr[1] = 0x00;
 172         ethaddr[2] = 0x04;
 173         ethaddr[3] = 0x00;
 174         ethaddr[4] = (unsigned char)(addr & 0xff);
 175         ethaddr[5] = (unsigned char)(addr >> 8);
 176 }
 177
 178 #define DN_MENUVER_ACC 0x01
 179 #define DN_MENUVER_USR 0x02
 180 #define DN_MENUVER_PRX 0x04
 181 #define DN_MENUVER_UIC 0x08
 182
 183 extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
 184 extern struct sock *dn_find_by_skb(struct sk_buff *skb);
 185 #define DN_ASCBUF_LEN 7
 186 extern char *dn_addr2asc(dn_address, char *);
 187 extern void dn_destroy_sock(struct sock *sk);
 188
 189 extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
 190 extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
 191
 192 extern void dn_start_slow_timer(struct sock *sk);
 193 extern void dn_stop_slow_timer(struct sock *sk);
 194 extern void dn_start_fast_timer(struct sock *sk);
 195 extern void dn_stop_fast_timer(struct sock *sk);
 196
 197 extern dn_address decnet_address;
 198 extern unsigned char decnet_ether_address[6];
 199 extern int decnet_node_type;
 200 extern int decnet_debug_level;
 201 extern int decnet_time_wait;
 202 extern int decnet_dn_count;
 203 extern int decnet_di_count;
 204 extern int decnet_dr_count;
 205
 206 #endif /* _NET_DN_H */