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TOMOYO Linux Cross Reference
Linux/include/net/dn.h

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  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 
 10 struct 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 
134 static 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)
158 struct 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 
175 static inline __le16 dn_eth2dn(unsigned char *ethaddr)
176 {
177         return get_unaligned((__le16 *)(ethaddr + 4));
178 }
179 
180 static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
181 {
182         return *(__le16 *)saddr->sdn_nodeaddr;
183 }
184 
185 static 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 
196 static 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 
202 extern 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 
209 extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
210 extern struct sock *dn_find_by_skb(struct sk_buff *skb);
211 #define DN_ASCBUF_LEN 9
212 extern char *dn_addr2asc(__u16, char *);
213 extern int dn_destroy_timer(struct sock *sk);
214 
215 extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
216 extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, unsigned char *type);
217 
218 extern void dn_start_slow_timer(struct sock *sk);
219 extern void dn_stop_slow_timer(struct sock *sk);
220 
221 extern __le16 decnet_address;
222 extern int decnet_debug_level;
223 extern int decnet_time_wait;
224 extern int decnet_dn_count;
225 extern int decnet_di_count;
226 extern int decnet_dr_count;
227 extern int decnet_no_fc_max_cwnd;
228 
229 extern long sysctl_decnet_mem[3];
230 extern int sysctl_decnet_wmem[3];
231 extern int sysctl_decnet_rmem[3];
232 
233 #endif /* _NET_DN_H */
234 

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