| #ifndef _NET_DN_H |
| #define _NET_DN_H |
| |
| #include <linux/dn.h> |
| #include <net/sock.h> |
| #include <net/flow.h> |
| #include <asm/byteorder.h> |
| #include <asm/unaligned.h> |
| |
| 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 */ |
| |
| __le16 addrloc; |
| __le16 addrrem; |
| __u16 numdat; |
| __u16 numoth; |
| __u16 numoth_rcv; |
| __u16 numdat_rcv; |
| __u16 ackxmt_dat; |
| __u16 ackxmt_oth; |
| __u16 ackrcv_dat; |
| __u16 ackrcv_oth; |
| __u8 flowrem_sw; |
| __u8 flowloc_sw; |
| #define DN_SEND 2 |
| #define DN_DONTSEND 1 |
| #define DN_NOCHANGE 0 |
| __u16 flowrem_dat; |
| __u16 flowrem_oth; |
| __u16 flowloc_dat; |
| __u16 flowloc_oth; |
| __u8 services_rem; |
| __u8 services_loc; |
| __u8 info_rem; |
| __u8 info_loc; |
| |
| __u16 segsize_rem; |
| __u16 segsize_loc; |
| |
| __u8 nonagle; |
| __u8 multi_ireq; |
| __u8 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); |
| |
| }; |
| |
| static inline struct dn_scp *DN_SK(struct sock *sk) |
| { |
| return (struct dn_scp *)(sk + 1); |
| } |
| |
| /* |
| * 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 { |
| __le16 dst; |
| __le16 src; |
| __u16 hops; |
| __le16 dst_port; |
| __le16 src_port; |
| __u8 services; |
| __u8 info; |
| __u8 rt_flags; |
| __u8 nsp_flags; |
| __u16 segsize; |
| __u16 segnum; |
| __u16 xmit_count; |
| unsigned long stamp; |
| int iif; |
| }; |
| |
| static inline __le16 dn_eth2dn(unsigned char *ethaddr) |
| { |
| return get_unaligned((__le16 *)(ethaddr + 4)); |
| } |
| |
| static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) |
| { |
| return *(__le16 *)saddr->sdn_nodeaddr; |
| } |
| |
| static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) |
| { |
| __u16 a = le16_to_cpu(addr); |
| ethaddr[0] = 0xAA; |
| ethaddr[1] = 0x00; |
| ethaddr[2] = 0x04; |
| ethaddr[3] = 0x00; |
| ethaddr[4] = (__u8)(a & 0xff); |
| ethaddr[5] = (__u8)(a >> 8); |
| } |
| |
| static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp) |
| { |
| fld->fld_sport = scp->addrloc; |
| fld->fld_dport = scp->addrrem; |
| } |
| |
| unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu); |
| void dn_register_sysctl(void); |
| void dn_unregister_sysctl(void); |
| |
| #define DN_MENUVER_ACC 0x01 |
| #define DN_MENUVER_USR 0x02 |
| #define DN_MENUVER_PRX 0x04 |
| #define DN_MENUVER_UIC 0x08 |
| |
| struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); |
| struct sock *dn_find_by_skb(struct sk_buff *skb); |
| #define DN_ASCBUF_LEN 9 |
| char *dn_addr2asc(__u16, char *); |
| int dn_destroy_timer(struct sock *sk); |
| |
| int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, |
| unsigned char type); |
| int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, |
| unsigned char *type); |
| |
| void dn_start_slow_timer(struct sock *sk); |
| void dn_stop_slow_timer(struct sock *sk); |
| |
| extern __le16 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; |
| |
| extern long sysctl_decnet_mem[3]; |
| extern int sysctl_decnet_wmem[3]; |
| extern int sysctl_decnet_rmem[3]; |
| |
| #endif /* _NET_DN_H */ |
