1#ifndef _NET_DN_H 2#define _NET_DN_H 3 4#include <linux/dn.h> 5#include <net/sock.h> 6#include <asm/byteorder.h> 7#include <asm/unaligned.h> 8 9struct dn_scp /* Session Control Port */ 10{ 11 unsigned char state; 12#define DN_O 1 /* Open */ 13#define DN_CR 2 /* Connect Receive */ 14#define DN_DR 3 /* Disconnect Reject */ 15#define DN_DRC 4 /* Discon. Rej. Complete*/ 16#define DN_CC 5 /* Connect Confirm */ 17#define DN_CI 6 /* Connect Initiate */ 18#define DN_NR 7 /* No resources */ 19#define DN_NC 8 /* No communication */ 20#define DN_CD 9 /* Connect Delivery */ 21#define DN_RJ 10 /* Rejected */ 22#define DN_RUN 11 /* Running */ 23#define DN_DI 12 /* Disconnect Initiate */ 24#define DN_DIC 13 /* Disconnect Complete */ 25#define DN_DN 14 /* Disconnect Notificat */ 26#define DN_CL 15 /* Closed */ 27#define DN_CN 16 /* Closed Notification */ 28 29 __le16 addrloc; 30 __le16 addrrem; 31 __u16 numdat; 32 __u16 numoth; 33 __u16 numoth_rcv; 34 __u16 numdat_rcv; 35 __u16 ackxmt_dat; 36 __u16 ackxmt_oth; 37 __u16 ackrcv_dat; 38 __u16 ackrcv_oth; 39 __u8 flowrem_sw; 40 __u8 flowloc_sw; 41#define DN_SEND 2 42#define DN_DONTSEND 1 43#define DN_NOCHANGE 0 44 __u16 flowrem_dat; 45 __u16 flowrem_oth; 46 __u16 flowloc_dat; 47 __u16 flowloc_oth; 48 __u8 services_rem; 49 __u8 services_loc; 50 __u8 info_rem; 51 __u8 info_loc; 52 53 __u16 segsize_rem; 54 __u16 segsize_loc; 55 56 __u8 nonagle; 57 __u8 multi_ireq; 58 __u8 accept_mode; 59 unsigned long seg_total; /* Running total of current segment */ 60 61 struct optdata_dn conndata_in; 62 struct optdata_dn conndata_out; 63 struct optdata_dn discdata_in; 64 struct optdata_dn discdata_out; 65 struct accessdata_dn accessdata; 66 67 struct sockaddr_dn addr; /* Local address */ 68 struct sockaddr_dn peer; /* Remote address */ 69 70 /* 71 * In this case the RTT estimation is not specified in the 72 * docs, nor is any back off algorithm. Here we follow well 73 * known tcp algorithms with a few small variations. 74 * 75 * snd_window: Max number of packets we send before we wait for 76 * an ack to come back. This will become part of a 77 * more complicated scheme when we support flow 78 * control. 79 * 80 * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling 81 * average. 82 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the 83 * varience of the smoothed average (but calculated in 84 * a simpler way than for normal statistical varience 85 * calculations). 86 * 87 * nsp_rxtshift: Backoff counter. Value is zero normally, each time 88 * a packet is lost is increases by one until an ack 89 * is received. Its used to index an array of backoff 90 * multipliers. 91 */ 92#define NSP_MIN_WINDOW 1 93#define NSP_MAX_WINDOW (0x07fe) 94 unsigned long max_window; 95 unsigned long snd_window; 96#define NSP_INITIAL_SRTT (HZ) 97 unsigned long nsp_srtt; 98#define NSP_INITIAL_RTTVAR (HZ*3) 99 unsigned long nsp_rttvar; 100#define NSP_MAXRXTSHIFT 12 101 unsigned long nsp_rxtshift; 102 103 /* 104 * Output queues, one for data, one for otherdata/linkservice 105 */ 106 struct sk_buff_head data_xmit_queue; 107 struct sk_buff_head other_xmit_queue; 108 109 /* 110 * Input queue for other data 111 */ 112 struct sk_buff_head other_receive_queue; 113 int other_report; 114 115 /* 116 * Stuff to do with the slow timer 117 */ 118 unsigned long stamp; /* time of last transmit */ 119 unsigned long persist; 120 int (*persist_fxn)(struct sock *sk); 121 unsigned long keepalive; 122 void (*keepalive_fxn)(struct sock *sk); 123 124 /* 125 * This stuff is for the fast timer for delayed acks 126 */ 127 struct timer_list delack_timer; 128 int delack_pending; 129 void (*delack_fxn)(struct sock *sk); 130 131}; 132 133static inline struct dn_scp *DN_SK(struct sock *sk) 134{ 135 return (struct dn_scp *)(sk + 1); 136} 137 138/* 139 * src,dst : Source and Destination DECnet addresses 140 * hops : Number of hops through the network 141 * dst_port, src_port : NSP port numbers 142 * services, info : Useful data extracted from conninit messages 143 * rt_flags : Routing flags byte 144 * nsp_flags : NSP layer flags byte 145 * segsize : Size of segment 146 * segnum : Number, for data, otherdata and linkservice 147 * xmit_count : Number of times we've transmitted this skb 148 * stamp : Time stamp of most recent transmission, used in RTT calculations 149 * iif: Input interface number 150 * 151 * As a general policy, this structure keeps all addresses in network 152 * byte order, and all else in host byte order. Thus dst, src, dst_port 153 * and src_port are in network order. All else is in host order. 154 * 155 */ 156#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb) 157struct dn_skb_cb { 158 __le16 dst; 159 __le16 src; 160 __u16 hops; 161 __le16 dst_port; 162 __le16 src_port; 163 __u8 services; 164 __u8 info; 165 __u8 rt_flags; 166 __u8 nsp_flags; 167 __u16 segsize; 168 __u16 segnum; 169 __u16 xmit_count; 170 unsigned long stamp; 171 int iif; 172}; 173 174static inline __le16 dn_eth2dn(unsigned char *ethaddr) 175{ 176 return get_unaligned((__le16 *)(ethaddr + 4)); 177} 178 179static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) 180{ 181 return *(__le16 *)saddr->sdn_nodeaddr; 182} 183 184static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) 185{ 186 __u16 a = le16_to_cpu(addr); 187 ethaddr[0] = 0xAA; 188 ethaddr[1] = 0x00; 189 ethaddr[2] = 0x04; 190 ethaddr[3] = 0x00; 191 ethaddr[4] = (__u8)(a & 0xff); 192 ethaddr[5] = (__u8)(a >> 8); 193} 194 195static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp) 196{ 197 fl->uli_u.dnports.sport = scp->addrloc; 198 fl->uli_u.dnports.dport = scp->addrrem; 199} 200 201extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu); 202 203#define DN_MENUVER_ACC 0x01 204#define DN_MENUVER_USR 0x02 205#define DN_MENUVER_PRX 0x04 206#define DN_MENUVER_UIC 0x08 207 208extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); 209extern struct sock *dn_find_by_skb(struct sk_buff *skb); 210#define DN_ASCBUF_LEN 9 211extern char *dn_addr2asc(__u16, char *); 212extern int dn_destroy_timer(struct sock *sk); 213 214extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type); 215extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type); 216 217extern void dn_start_slow_timer(struct sock *sk); 218extern void dn_stop_slow_timer(struct sock *sk); 219 220extern __le16 decnet_address; 221extern int decnet_debug_level; 222extern int decnet_time_wait; 223extern int decnet_dn_count; 224extern int decnet_di_count; 225extern int decnet_dr_count; 226extern int decnet_no_fc_max_cwnd; 227 228extern int sysctl_decnet_mem[3]; 229extern int sysctl_decnet_wmem[3]; 230extern int sysctl_decnet_rmem[3]; 231 232#endif /* _NET_DN_H */ 233