7 #include <asm/byteorder.h>
9 #define dn_ntohs(x) le16_to_cpu(x)
10 #define dn_htons(x) cpu_to_le16(x)
12 struct dn_scp /* Session Control Port */
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 */
62 unsigned long seg_total; /* Running total of current segment */
64 struct optdata_dn conndata_in;
65 struct optdata_dn conndata_out;
66 struct optdata_dn discdata_in;
67 struct optdata_dn discdata_out;
68 struct accessdata_dn accessdata;
70 struct sockaddr_dn addr; /* Local address */
71 struct sockaddr_dn peer; /* Remote address */
74 * In this case the RTT estimation is not specified in the
75 * docs, nor is any back off algorithm. Here we follow well
76 * known tcp algorithms with a few small variations.
78 * snd_window: Max number of packets we send before we wait for
79 * an ack to come back. This will become part of a
80 * more complicated scheme when we support flow
83 * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
85 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
86 * varience of the smoothed average (but calculated in
87 * a simpler way than for normal statistical varience
90 * nsp_rxtshift: Backoff counter. Value is zero normally, each time
91 * a packet is lost is increases by one until an ack
92 * is received. Its used to index an array of backoff
95 #define NSP_MIN_WINDOW 1
96 #define NSP_MAX_WINDOW (0x07fe)
97 unsigned long max_window;
98 unsigned long snd_window;
99 #define NSP_INITIAL_SRTT (HZ)
100 unsigned long nsp_srtt;
101 #define NSP_INITIAL_RTTVAR (HZ*3)
102 unsigned long nsp_rttvar;
103 #define NSP_MAXRXTSHIFT 12
104 unsigned long nsp_rxtshift;
107 * Output queues, one for data, one for otherdata/linkservice
109 struct sk_buff_head data_xmit_queue;
110 struct sk_buff_head other_xmit_queue;
113 * Input queue for other data
115 struct sk_buff_head other_receive_queue;
119 * Stuff to do with the slow timer
121 unsigned long stamp; /* time of last transmit */
122 unsigned long persist;
123 int (*persist_fxn)(struct sock *sk);
124 unsigned long keepalive;
125 void (*keepalive_fxn)(struct sock *sk);
128 * This stuff is for the fast timer for delayed acks
130 struct timer_list delack_timer;
132 void (*delack_fxn)(struct sock *sk);
136 static inline struct dn_scp *DN_SK(struct sock *sk)
138 return (struct dn_scp *)(sk + 1);
142 * src,dst : Source and Destination DECnet addresses
143 * hops : Number of hops through the network
144 * dst_port, src_port : NSP port numbers
145 * services, info : Useful data extracted from conninit messages
146 * rt_flags : Routing flags byte
147 * nsp_flags : NSP layer flags byte
148 * segsize : Size of segment
149 * segnum : Number, for data, otherdata and linkservice
150 * xmit_count : Number of times we've transmitted this skb
151 * stamp : Time stamp of most recent transmission, used in RTT calculations
152 * iif: Input interface number
154 * As a general policy, this structure keeps all addresses in network
155 * byte order, and all else in host byte order. Thus dst, src, dst_port
156 * and src_port are in network order. All else is in host order.
159 #define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
177 static inline __le16 dn_eth2dn(unsigned char *ethaddr)
179 return dn_htons(ethaddr[4] | (ethaddr[5] << 8));
182 static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
184 return *(__le16 *)saddr->sdn_nodeaddr;
187 static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
189 __u16 a = dn_ntohs(addr);
194 ethaddr[4] = (__u8)(a & 0xff);
195 ethaddr[5] = (__u8)(a >> 8);
198 static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp)
200 fl->uli_u.dnports.sport = scp->addrloc;
201 fl->uli_u.dnports.dport = scp->addrrem;
202 fl->uli_u.dnports.objnum = scp->addr.sdn_objnum;
203 if (fl->uli_u.dnports.objnum == 0) {
204 fl->uli_u.dnports.objnamel = (__u8)dn_ntohs(scp->addr.sdn_objnamel);
205 memcpy(fl->uli_u.dnports.objname, scp->addr.sdn_objname, 16);
209 extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu);
211 #define DN_MENUVER_ACC 0x01
212 #define DN_MENUVER_USR 0x02
213 #define DN_MENUVER_PRX 0x04
214 #define DN_MENUVER_UIC 0x08
216 extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
217 extern struct sock *dn_find_by_skb(struct sk_buff *skb);
218 #define DN_ASCBUF_LEN 9
219 extern char *dn_addr2asc(__u16, char *);
220 extern int dn_destroy_timer(struct sock *sk);
222 extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
223 extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
225 extern void dn_start_slow_timer(struct sock *sk);
226 extern void dn_stop_slow_timer(struct sock *sk);
228 extern __le16 decnet_address;
229 extern int decnet_debug_level;
230 extern int decnet_time_wait;
231 extern int decnet_dn_count;
232 extern int decnet_di_count;
233 extern int decnet_dr_count;
234 extern int decnet_no_fc_max_cwnd;
236 extern int sysctl_decnet_mem[3];
237 extern int sysctl_decnet_wmem[3];
238 extern int sysctl_decnet_rmem[3];
240 #endif /* _NET_DN_H */