1#ifndef _NET_DN_H 2#define _NET_DN_H 3 4#include <linux/dn.h> 5#include <net/sock.h> 6#include <net/flow.h> 7#include <asm/byteorder.h> 8#include <asm/unaligned.h> 9 10struct dn_scp /* Session Control Port */ 11{ 12 unsigned char state; 13#define DN_O 1 /* Open */ 14#define DN_CR 2 /* Connect Receive */ 15#define DN_DR 3 /* Disconnect Reject */ 16#define DN_DRC 4 /* Discon. Rej. Complete*/ 17#define DN_CC 5 /* Connect Confirm */ 18#define DN_CI 6 /* Connect Initiate */ 19#define DN_NR 7 /* No resources */ 20#define DN_NC 8 /* No communication */ 21#define DN_CD 9 /* Connect Delivery */ 22#define DN_RJ 10 /* Rejected */ 23#define DN_RUN 11 /* Running */ 24#define DN_DI 12 /* Disconnect Initiate */ 25#define DN_DIC 13 /* Disconnect Complete */ 26#define DN_DN 14 /* Disconnect Notificat */ 27#define DN_CL 15 /* Closed */ 28#define DN_CN 16 /* Closed Notification */ 29 30 __le16 addrloc; 31 __le16 addrrem; 32 __u16 numdat; 33 __u16 numoth; 34 __u16 numoth_rcv; 35 __u16 numdat_rcv; 36 __u16 ackxmt_dat; 37 __u16 ackxmt_oth; 38 __u16 ackrcv_dat; 39 __u16 ackrcv_oth; 40 __u8 flowrem_sw; 41 __u8 flowloc_sw; 42#define DN_SEND 2 43#define DN_DONTSEND 1 44#define DN_NOCHANGE 0 45 __u16 flowrem_dat; 46 __u16 flowrem_oth; 47 __u16 flowloc_dat; 48 __u16 flowloc_oth; 49 __u8 services_rem; 50 __u8 services_loc; 51 __u8 info_rem; 52 __u8 info_loc; 53 54 __u16 segsize_rem; 55 __u16 segsize_loc; 56 57 __u8 nonagle; 58 __u8 multi_ireq; 59 __u8 accept_mode; 60 unsigned long seg_total; /* Running total of current segment */ 61 62 struct optdata_dn conndata_in; 63 struct optdata_dn conndata_out; 64 struct optdata_dn discdata_in; 65 struct optdata_dn discdata_out; 66 struct accessdata_dn accessdata; 67 68 struct sockaddr_dn addr; /* Local address */ 69 struct sockaddr_dn peer; /* Remote address */ 70 71 /* 72 * In this case the RTT estimation is not specified in the 73 * docs, nor is any back off algorithm. Here we follow well 74 * known tcp algorithms with a few small variations. 75 * 76 * snd_window: Max number of packets we send before we wait for 77 * an ack to come back. This will become part of a 78 * more complicated scheme when we support flow 79 * control. 80 * 81 * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling 82 * average. 83 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the 84 * varience of the smoothed average (but calculated in 85 * a simpler way than for normal statistical varience 86 * calculations). 87 * 88 * nsp_rxtshift: Backoff counter. Value is zero normally, each time 89 * a packet is lost is increases by one until an ack 90 * is received. Its used to index an array of backoff 91 * multipliers. 92 */ 93#define NSP_MIN_WINDOW 1 94#define NSP_MAX_WINDOW (0x07fe) 95 unsigned long max_window; 96 unsigned long snd_window; 97#define NSP_INITIAL_SRTT (HZ) 98 unsigned long nsp_srtt; 99#define NSP_INITIAL_RTTVAR (HZ*3) 100 unsigned long nsp_rttvar; 101#define NSP_MAXRXTSHIFT 12 102 unsigned long nsp_rxtshift; 103 104 /* 105 * Output queues, one for data, one for otherdata/linkservice 106 */ 107 struct sk_buff_head data_xmit_queue; 108 struct sk_buff_head other_xmit_queue; 109 110 /* 111 * Input queue for other data 112 */ 113 struct sk_buff_head other_receive_queue; 114 int other_report; 115 116 /* 117 * Stuff to do with the slow timer 118 */ 119 unsigned long stamp; /* time of last transmit */ 120 unsigned long persist; 121 int (*persist_fxn)(struct sock *sk); 122 unsigned long keepalive; 123 void (*keepalive_fxn)(struct sock *sk); 124 125 /* 126 * This stuff is for the fast timer for delayed acks 127 */ 128 struct timer_list delack_timer; 129 int delack_pending; 130 void (*delack_fxn)(struct sock *sk); 131 132}; 133 134static inline struct dn_scp *DN_SK(struct sock *sk) 135{ 136 return (struct dn_scp *)(sk + 1); 137} 138 139/* 140 * src,dst : Source and Destination DECnet addresses 141 * hops : Number of hops through the network 142 * dst_port, src_port : NSP port numbers 143 * services, info : Useful data extracted from conninit messages 144 * rt_flags : Routing flags byte 145 * nsp_flags : NSP layer flags byte 146 * segsize : Size of segment 147 * segnum : Number, for data, otherdata and linkservice 148 * xmit_count : Number of times we've transmitted this skb 149 * stamp : Time stamp of most recent transmission, used in RTT calculations 150 * iif: Input interface number 151 * 152 * As a general policy, this structure keeps all addresses in network 153 * byte order, and all else in host byte order. Thus dst, src, dst_port 154 * and src_port are in network order. All else is in host order. 155 * 156 */ 157#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb) 158struct dn_skb_cb { 159 __le16 dst; 160 __le16 src; 161 __u16 hops; 162 __le16 dst_port; 163 __le16 src_port; 164 __u8 services; 165 __u8 info; 166 __u8 rt_flags; 167 __u8 nsp_flags; 168 __u16 segsize; 169 __u16 segnum; 170 __u16 xmit_count; 171 unsigned long stamp; 172 int iif; 173}; 174 175static inline __le16 dn_eth2dn(unsigned char *ethaddr) 176{ 177 return get_unaligned((__le16 *)(ethaddr + 4)); 178} 179 180static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) 181{ 182 return *(__le16 *)saddr->sdn_nodeaddr; 183} 184 185static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) 186{ 187 __u16 a = le16_to_cpu(addr); 188 ethaddr[0] = 0xAA; 189 ethaddr[1] = 0x00; 190 ethaddr[2] = 0x04; 191 ethaddr[3] = 0x00; 192 ethaddr[4] = (__u8)(a & 0xff); 193 ethaddr[5] = (__u8)(a >> 8); 194} 195 196static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp) 197{ 198 fld->fld_sport = scp->addrloc; 199 fld->fld_dport = scp->addrrem; 200} 201 202extern unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu); 203 204#define DN_MENUVER_ACC 0x01 205#define DN_MENUVER_USR 0x02 206#define DN_MENUVER_PRX 0x04 207#define DN_MENUVER_UIC 0x08 208 209extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); 210extern struct sock *dn_find_by_skb(struct sk_buff *skb); 211#define DN_ASCBUF_LEN 9 212extern char *dn_addr2asc(__u16, char *); 213extern int dn_destroy_timer(struct sock *sk); 214 215extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type); 216extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type); 217 218extern void dn_start_slow_timer(struct sock *sk); 219extern void dn_stop_slow_timer(struct sock *sk); 220 221extern __le16 decnet_address; 222extern int decnet_debug_level; 223extern int decnet_time_wait; 224extern int decnet_dn_count; 225extern int decnet_di_count; 226extern int decnet_dr_count; 227extern int decnet_no_fc_max_cwnd; 228 229extern long sysctl_decnet_mem[3]; 230extern int sysctl_decnet_wmem[3]; 231extern int sysctl_decnet_rmem[3]; 232 233#endif /* _NET_DN_H */ 234