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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 | #ifndef _NET_DN_H #define _NET_DN_H #include <linux/dn.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); }; #define DN_SK(__sk) ((struct dn_scp *)(__sk)->sk_protinfo) /* * 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 void dn_start_fast_timer(struct sock *sk); extern void dn_stop_fast_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 */ |