#ifndef _NET_DN_H #define _NET_DN_H #include #include typedef unsigned short dn_address; #define dn_ntohs(x) le16_to_cpu(x) #define dn_htons(x) cpu_to_le16(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 char accept_mode; unsigned short mss; unsigned long seg_size; /* 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 512 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); }; /* * src,dst : Source and Destination DECnet addresses * neigh: Address from which we've just got this skb. * 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 first 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 * src_port and neigh are in network order. All else is in host order. * */ struct dn_skb_cb { unsigned short dst; unsigned short src; unsigned short neigh; 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); } #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 7 extern char *dn_addr2asc(dn_address, char *); extern void dn_destroy_sock(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 void dn_start_fast_timer(struct sock *sk); extern void dn_stop_fast_timer(struct sock *sk); extern dn_address decnet_address; extern unsigned char decnet_ether_address[6]; extern int decnet_node_type; 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; #endif /* _NET_DN_H */