aboutsummaryrefslogtreecommitdiff
path: root/include/net/dn.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/dn.h')
-rw-r--r--include/net/dn.h236
1 files changed, 236 insertions, 0 deletions
diff --git a/include/net/dn.h b/include/net/dn.h
new file mode 100644
index 00000000000..5551c46db39
--- /dev/null
+++ b/include/net/dn.h
@@ -0,0 +1,236 @@
+#ifndef _NET_DN_H
+#define _NET_DN_H
+
+#include <linux/dn.h>
+#include <net/sock.h>
+#include <asm/byteorder.h>
+
+typedef unsigned short dn_address;
+
+#define dn_ntohs(x) le16_to_cpu((unsigned short)(x))
+#define dn_htons(x) cpu_to_le16((unsigned short)(x))
+
+struct dn_scp /* Session Control Port */
+{
+ unsigned char state;
+#define DN_O 1 /* Open */
+#define DN_CR 2 /* Connect Receive */
+#define DN_DR 3 /* Disconnect Reject */
+#define DN_DRC 4 /* Discon. Rej. Complete*/
+#define DN_CC 5 /* Connect Confirm */
+#define DN_CI 6 /* Connect Initiate */
+#define DN_NR 7 /* No resources */
+#define DN_NC 8 /* No communication */
+#define DN_CD 9 /* Connect Delivery */
+#define DN_RJ 10 /* Rejected */
+#define DN_RUN 11 /* Running */
+#define DN_DI 12 /* Disconnect Initiate */
+#define DN_DIC 13 /* Disconnect Complete */
+#define DN_DN 14 /* Disconnect Notificat */
+#define DN_CL 15 /* Closed */
+#define DN_CN 16 /* Closed Notification */
+
+ unsigned short addrloc;
+ unsigned short addrrem;
+ unsigned short numdat;
+ unsigned short numoth;
+ unsigned short numoth_rcv;
+ unsigned short numdat_rcv;
+ unsigned short ackxmt_dat;
+ unsigned short ackxmt_oth;
+ unsigned short ackrcv_dat;
+ unsigned short ackrcv_oth;
+ unsigned char flowrem_sw;
+ unsigned char flowloc_sw;
+#define DN_SEND 2
+#define DN_DONTSEND 1
+#define DN_NOCHANGE 0
+ unsigned short flowrem_dat;
+ unsigned short flowrem_oth;
+ unsigned short flowloc_dat;
+ unsigned short flowloc_oth;
+ unsigned char services_rem;
+ unsigned char services_loc;
+ unsigned char info_rem;
+ unsigned char info_loc;
+
+ unsigned short segsize_rem;
+ unsigned short segsize_loc;
+
+ unsigned char nonagle;
+ unsigned char multi_ireq;
+ unsigned char accept_mode;
+ unsigned long seg_total; /* Running total of current segment */
+
+ struct optdata_dn conndata_in;
+ struct optdata_dn conndata_out;
+ struct optdata_dn discdata_in;
+ struct optdata_dn discdata_out;
+ struct accessdata_dn accessdata;
+
+ struct sockaddr_dn addr; /* Local address */
+ struct sockaddr_dn peer; /* Remote address */
+
+ /*
+ * In this case the RTT estimation is not specified in the
+ * docs, nor is any back off algorithm. Here we follow well
+ * known tcp algorithms with a few small variations.
+ *
+ * snd_window: Max number of packets we send before we wait for
+ * an ack to come back. This will become part of a
+ * more complicated scheme when we support flow
+ * control.
+ *
+ * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
+ * average.
+ * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
+ * varience of the smoothed average (but calculated in
+ * a simpler way than for normal statistical varience
+ * calculations).
+ *
+ * nsp_rxtshift: Backoff counter. Value is zero normally, each time
+ * a packet is lost is increases by one until an ack
+ * is received. Its used to index an array of backoff
+ * multipliers.
+ */
+#define NSP_MIN_WINDOW 1
+#define NSP_MAX_WINDOW (0x07fe)
+ unsigned long max_window;
+ unsigned long snd_window;
+#define NSP_INITIAL_SRTT (HZ)
+ unsigned long nsp_srtt;
+#define NSP_INITIAL_RTTVAR (HZ*3)
+ unsigned long nsp_rttvar;
+#define NSP_MAXRXTSHIFT 12
+ unsigned long nsp_rxtshift;
+
+ /*
+ * Output queues, one for data, one for otherdata/linkservice
+ */
+ struct sk_buff_head data_xmit_queue;
+ struct sk_buff_head other_xmit_queue;
+
+ /*
+ * Input queue for other data
+ */
+ struct sk_buff_head other_receive_queue;
+ int other_report;
+
+ /*
+ * Stuff to do with the slow timer
+ */
+ unsigned long stamp; /* time of last transmit */
+ unsigned long persist;
+ int (*persist_fxn)(struct sock *sk);
+ unsigned long keepalive;
+ void (*keepalive_fxn)(struct sock *sk);
+
+ /*
+ * This stuff is for the fast timer for delayed acks
+ */
+ struct timer_list delack_timer;
+ int delack_pending;
+ void (*delack_fxn)(struct sock *sk);
+
+};
+
+static inline struct dn_scp *DN_SK(struct sock *sk)
+{
+ return (struct dn_scp *)(sk + 1);
+}
+
+/*
+ * src,dst : Source and Destination DECnet addresses
+ * hops : Number of hops through the network
+ * dst_port, src_port : NSP port numbers
+ * services, info : Useful data extracted from conninit messages
+ * rt_flags : Routing flags byte
+ * nsp_flags : NSP layer flags byte
+ * segsize : Size of segment
+ * segnum : Number, for data, otherdata and linkservice
+ * xmit_count : Number of times we've transmitted this skb
+ * stamp : Time stamp of most recent transmission, used in RTT calculations
+ * iif: Input interface number
+ *
+ * As a general policy, this structure keeps all addresses in network
+ * byte order, and all else in host byte order. Thus dst, src, dst_port
+ * and src_port are in network order. All else is in host order.
+ *
+ */
+#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
+struct dn_skb_cb {
+ unsigned short dst;
+ unsigned short src;
+ unsigned short hops;
+ unsigned short dst_port;
+ unsigned short src_port;
+ unsigned char services;
+ unsigned char info;
+ unsigned char rt_flags;
+ unsigned char nsp_flags;
+ unsigned short segsize;
+ unsigned short segnum;
+ unsigned short xmit_count;
+ unsigned long stamp;
+ int iif;
+};
+
+static inline dn_address dn_eth2dn(unsigned char *ethaddr)
+{
+ return ethaddr[4] | (ethaddr[5] << 8);
+}
+
+static inline dn_address dn_saddr2dn(struct sockaddr_dn *saddr)
+{
+ return *(dn_address *)saddr->sdn_nodeaddr;
+}
+
+static inline void dn_dn2eth(unsigned char *ethaddr, dn_address addr)
+{
+ ethaddr[0] = 0xAA;
+ ethaddr[1] = 0x00;
+ ethaddr[2] = 0x04;
+ ethaddr[3] = 0x00;
+ ethaddr[4] = (unsigned char)(addr & 0xff);
+ ethaddr[5] = (unsigned char)(addr >> 8);
+}
+
+static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp)
+{
+ fl->uli_u.dnports.sport = scp->addrloc;
+ fl->uli_u.dnports.dport = scp->addrrem;
+ fl->uli_u.dnports.objnum = scp->addr.sdn_objnum;
+ if (fl->uli_u.dnports.objnum == 0) {
+ fl->uli_u.dnports.objnamel = scp->addr.sdn_objnamel;
+ memcpy(fl->uli_u.dnports.objname, scp->addr.sdn_objname, 16);
+ }
+}
+
+extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu);
+
+#define DN_MENUVER_ACC 0x01
+#define DN_MENUVER_USR 0x02
+#define DN_MENUVER_PRX 0x04
+#define DN_MENUVER_UIC 0x08
+
+extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
+extern struct sock *dn_find_by_skb(struct sk_buff *skb);
+#define DN_ASCBUF_LEN 9
+extern char *dn_addr2asc(dn_address, char *);
+extern int dn_destroy_timer(struct sock *sk);
+
+extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
+extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
+
+extern void dn_start_slow_timer(struct sock *sk);
+extern void dn_stop_slow_timer(struct sock *sk);
+
+extern dn_address decnet_address;
+extern int decnet_debug_level;
+extern int decnet_time_wait;
+extern int decnet_dn_count;
+extern int decnet_di_count;
+extern int decnet_dr_count;
+extern int decnet_no_fc_max_cwnd;
+
+#endif /* _NET_DN_H */