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231 lines
6.9 KiB
231 lines
6.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _NET_DN_H |
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#define _NET_DN_H |
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#include <linux/dn.h> |
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#include <net/sock.h> |
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#include <net/flow.h> |
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#include <asm/byteorder.h> |
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#include <asm/unaligned.h> |
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struct dn_scp /* Session Control Port */ |
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{ |
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unsigned char state; |
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#define DN_O 1 /* Open */ |
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#define DN_CR 2 /* Connect Receive */ |
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#define DN_DR 3 /* Disconnect Reject */ |
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#define DN_DRC 4 /* Discon. Rej. Complete*/ |
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#define DN_CC 5 /* Connect Confirm */ |
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#define DN_CI 6 /* Connect Initiate */ |
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#define DN_NR 7 /* No resources */ |
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#define DN_NC 8 /* No communication */ |
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#define DN_CD 9 /* Connect Delivery */ |
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#define DN_RJ 10 /* Rejected */ |
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#define DN_RUN 11 /* Running */ |
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#define DN_DI 12 /* Disconnect Initiate */ |
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#define DN_DIC 13 /* Disconnect Complete */ |
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#define DN_DN 14 /* Disconnect Notificat */ |
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#define DN_CL 15 /* Closed */ |
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#define DN_CN 16 /* Closed Notification */ |
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__le16 addrloc; |
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__le16 addrrem; |
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__u16 numdat; |
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__u16 numoth; |
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__u16 numoth_rcv; |
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__u16 numdat_rcv; |
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__u16 ackxmt_dat; |
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__u16 ackxmt_oth; |
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__u16 ackrcv_dat; |
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__u16 ackrcv_oth; |
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__u8 flowrem_sw; |
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__u8 flowloc_sw; |
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#define DN_SEND 2 |
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#define DN_DONTSEND 1 |
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#define DN_NOCHANGE 0 |
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__u16 flowrem_dat; |
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__u16 flowrem_oth; |
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__u16 flowloc_dat; |
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__u16 flowloc_oth; |
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__u8 services_rem; |
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__u8 services_loc; |
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__u8 info_rem; |
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__u8 info_loc; |
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__u16 segsize_rem; |
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__u16 segsize_loc; |
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__u8 nonagle; |
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__u8 multi_ireq; |
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__u8 accept_mode; |
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unsigned long seg_total; /* Running total of current segment */ |
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struct optdata_dn conndata_in; |
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struct optdata_dn conndata_out; |
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struct optdata_dn discdata_in; |
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struct optdata_dn discdata_out; |
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struct accessdata_dn accessdata; |
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struct sockaddr_dn addr; /* Local address */ |
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struct sockaddr_dn peer; /* Remote address */ |
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/* |
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* In this case the RTT estimation is not specified in the |
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* docs, nor is any back off algorithm. Here we follow well |
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* known tcp algorithms with a few small variations. |
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* |
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* snd_window: Max number of packets we send before we wait for |
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* an ack to come back. This will become part of a |
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* more complicated scheme when we support flow |
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* control. |
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* |
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* nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling |
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* average. |
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* nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the |
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* varience of the smoothed average (but calculated in |
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* a simpler way than for normal statistical varience |
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* calculations). |
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* |
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* nsp_rxtshift: Backoff counter. Value is zero normally, each time |
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* a packet is lost is increases by one until an ack |
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* is received. Its used to index an array of backoff |
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* multipliers. |
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*/ |
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#define NSP_MIN_WINDOW 1 |
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#define NSP_MAX_WINDOW (0x07fe) |
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unsigned long max_window; |
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unsigned long snd_window; |
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#define NSP_INITIAL_SRTT (HZ) |
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unsigned long nsp_srtt; |
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#define NSP_INITIAL_RTTVAR (HZ*3) |
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unsigned long nsp_rttvar; |
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#define NSP_MAXRXTSHIFT 12 |
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unsigned long nsp_rxtshift; |
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/* |
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* Output queues, one for data, one for otherdata/linkservice |
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*/ |
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struct sk_buff_head data_xmit_queue; |
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struct sk_buff_head other_xmit_queue; |
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/* |
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* Input queue for other data |
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*/ |
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struct sk_buff_head other_receive_queue; |
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int other_report; |
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/* |
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* Stuff to do with the slow timer |
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*/ |
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unsigned long stamp; /* time of last transmit */ |
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unsigned long persist; |
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int (*persist_fxn)(struct sock *sk); |
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unsigned long keepalive; |
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void (*keepalive_fxn)(struct sock *sk); |
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}; |
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static inline struct dn_scp *DN_SK(struct sock *sk) |
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{ |
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return (struct dn_scp *)(sk + 1); |
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} |
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/* |
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* src,dst : Source and Destination DECnet addresses |
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* hops : Number of hops through the network |
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* dst_port, src_port : NSP port numbers |
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* services, info : Useful data extracted from conninit messages |
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* rt_flags : Routing flags byte |
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* nsp_flags : NSP layer flags byte |
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* segsize : Size of segment |
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* segnum : Number, for data, otherdata and linkservice |
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* xmit_count : Number of times we've transmitted this skb |
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* stamp : Time stamp of most recent transmission, used in RTT calculations |
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* iif: Input interface number |
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* |
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* As a general policy, this structure keeps all addresses in network |
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* byte order, and all else in host byte order. Thus dst, src, dst_port |
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* and src_port are in network order. All else is in host order. |
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* |
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*/ |
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#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb) |
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struct dn_skb_cb { |
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__le16 dst; |
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__le16 src; |
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__u16 hops; |
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__le16 dst_port; |
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__le16 src_port; |
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__u8 services; |
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__u8 info; |
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__u8 rt_flags; |
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__u8 nsp_flags; |
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__u16 segsize; |
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__u16 segnum; |
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__u16 xmit_count; |
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unsigned long stamp; |
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int iif; |
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}; |
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static inline __le16 dn_eth2dn(unsigned char *ethaddr) |
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{ |
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return get_unaligned((__le16 *)(ethaddr + 4)); |
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} |
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static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr) |
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{ |
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return *(__le16 *)saddr->sdn_nodeaddr; |
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} |
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static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr) |
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{ |
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__u16 a = le16_to_cpu(addr); |
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ethaddr[0] = 0xAA; |
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ethaddr[1] = 0x00; |
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ethaddr[2] = 0x04; |
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ethaddr[3] = 0x00; |
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ethaddr[4] = (__u8)(a & 0xff); |
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ethaddr[5] = (__u8)(a >> 8); |
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} |
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static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp) |
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{ |
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fld->fld_sport = scp->addrloc; |
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fld->fld_dport = scp->addrrem; |
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} |
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unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu); |
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void dn_register_sysctl(void); |
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void dn_unregister_sysctl(void); |
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#define DN_MENUVER_ACC 0x01 |
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#define DN_MENUVER_USR 0x02 |
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#define DN_MENUVER_PRX 0x04 |
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#define DN_MENUVER_UIC 0x08 |
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struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr); |
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struct sock *dn_find_by_skb(struct sk_buff *skb); |
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#define DN_ASCBUF_LEN 9 |
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char *dn_addr2asc(__u16, char *); |
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int dn_destroy_timer(struct sock *sk); |
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int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, |
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unsigned char type); |
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int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr, |
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unsigned char *type); |
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void dn_start_slow_timer(struct sock *sk); |
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void dn_stop_slow_timer(struct sock *sk); |
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extern __le16 decnet_address; |
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extern int decnet_debug_level; |
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extern int decnet_time_wait; |
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extern int decnet_dn_count; |
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extern int decnet_di_count; |
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extern int decnet_dr_count; |
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extern int decnet_no_fc_max_cwnd; |
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extern long sysctl_decnet_mem[3]; |
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extern int sysctl_decnet_wmem[3]; |
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extern int sysctl_decnet_rmem[3]; |
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#endif /* _NET_DN_H */
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