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linux/include/net/dn.h
Steven Whitehouse 1f12bcc9d1 [DECNET]: add memory buffer settings 
The patch (originally from Steve) simply adds memory buffer settings to 
DECnet similar to those in TCP.

Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-12-05 13:42:06 -08:00

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#ifndef _NET_DN_H
#define _NET_DN_H
#include <linux/dn.h>
#include <net/sock.h>
#include <net/tcp.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);
};
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 {
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 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;
extern int sysctl_decnet_mem[3];
extern int sysctl_decnet_wmem[3];
extern int sysctl_decnet_rmem[3];
#endif /* _NET_DN_H */
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