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Diffstat (limited to '')
| -rw-r--r-- | include/net/dn.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/include/net/dn.h b/include/net/dn.h new file mode 100644 index 000000000..56ab0726c --- /dev/null +++ b/include/net/dn.h @@ -0,0 +1,231 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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); + +}; + +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 */ |