2005-04-17 06:20:36 +08:00
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/*
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* Declarations of AX.25 type objects.
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*
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* Alan Cox (GW4PTS) 10/11/93
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*/
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#ifndef _AX25_H
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#define _AX25_H
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#include <linux/config.h>
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#include <linux/ax25.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/list.h>
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#include <asm/atomic.h>
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#define AX25_T1CLAMPLO 1
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#define AX25_T1CLAMPHI (30 * HZ)
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#define AX25_BPQ_HEADER_LEN 16
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#define AX25_KISS_HEADER_LEN 1
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#define AX25_HEADER_LEN 17
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#define AX25_ADDR_LEN 7
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#define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN)
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#define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
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/* AX.25 Protocol IDs */
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#define AX25_P_ROSE 0x01
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#define AX25_P_IP 0xCC
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#define AX25_P_ARP 0xCD
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#define AX25_P_TEXT 0xF0
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#define AX25_P_NETROM 0xCF
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#define AX25_P_SEGMENT 0x08
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/* AX.25 Segment control values */
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#define AX25_SEG_REM 0x7F
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#define AX25_SEG_FIRST 0x80
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#define AX25_CBIT 0x80 /* Command/Response bit */
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#define AX25_EBIT 0x01 /* HDLC Address Extension bit */
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#define AX25_HBIT 0x80 /* Has been repeated bit */
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#define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */
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#define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */
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#define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */
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#define AX25_COND_ACK_PENDING 0x01
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#define AX25_COND_REJECT 0x02
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#define AX25_COND_PEER_RX_BUSY 0x04
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#define AX25_COND_OWN_RX_BUSY 0x08
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#define AX25_COND_DAMA_MODE 0x10
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#ifndef _LINUX_NETDEVICE_H
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#include <linux/netdevice.h>
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#endif
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/* Upper sub-layer (LAPB) definitions */
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/* Control field templates */
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#define AX25_I 0x00 /* Information frames */
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#define AX25_S 0x01 /* Supervisory frames */
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#define AX25_RR 0x01 /* Receiver ready */
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#define AX25_RNR 0x05 /* Receiver not ready */
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#define AX25_REJ 0x09 /* Reject */
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#define AX25_U 0x03 /* Unnumbered frames */
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#define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */
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#define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */
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#define AX25_DISC 0x43 /* Disconnect */
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#define AX25_DM 0x0f /* Disconnected mode */
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#define AX25_UA 0x63 /* Unnumbered acknowledge */
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#define AX25_FRMR 0x87 /* Frame reject */
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#define AX25_UI 0x03 /* Unnumbered information */
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#define AX25_XID 0xaf /* Exchange information */
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#define AX25_TEST 0xe3 /* Test */
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#define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
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#define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
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#define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
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#define AX25_POLLOFF 0
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#define AX25_POLLON 1
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/* AX25 L2 C-bit */
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#define AX25_COMMAND 1
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#define AX25_RESPONSE 2
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/* Define Link State constants. */
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enum {
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AX25_STATE_0,
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AX25_STATE_1,
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AX25_STATE_2,
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AX25_STATE_3,
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AX25_STATE_4
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};
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#define AX25_MODULUS 8 /* Standard AX.25 modulus */
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#define AX25_EMODULUS 128 /* Extended AX.25 modulus */
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enum {
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AX25_PROTO_STD_SIMPLEX,
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AX25_PROTO_STD_DUPLEX,
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AX25_PROTO_DAMA_SLAVE,
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AX25_PROTO_DAMA_MASTER
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};
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enum {
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AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
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AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
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AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
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AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
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AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
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AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
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AX25_VALUES_T1, /* Default T1 timeout value */
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AX25_VALUES_T2, /* Default T2 timeout value */
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AX25_VALUES_T3, /* Default T3 timeout value */
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AX25_VALUES_IDLE, /* Connected mode idle timer */
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AX25_VALUES_N2, /* Default N2 value */
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AX25_VALUES_PACLEN, /* AX.25 MTU */
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AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */
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AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */
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AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
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};
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#define AX25_DEF_IPDEFMODE 0 /* Datagram */
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#define AX25_DEF_AXDEFMODE 0 /* Normal */
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#define AX25_DEF_BACKOFF 1 /* Linear backoff */
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#define AX25_DEF_CONMODE 2 /* Connected mode allowed */
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#define AX25_DEF_WINDOW 2 /* Window=2 */
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#define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
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#define AX25_DEF_T1 (10 * HZ) /* T1=10s */
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#define AX25_DEF_T2 (3 * HZ) /* T2=3s */
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#define AX25_DEF_T3 (300 * HZ) /* T3=300s */
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#define AX25_DEF_N2 10 /* N2=10 */
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#define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */
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#define AX25_DEF_PACLEN 256 /* Paclen=256 */
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#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */
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#define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */
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typedef struct ax25_uid_assoc {
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struct ax25_uid_assoc *next;
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uid_t uid;
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ax25_address call;
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} ax25_uid_assoc;
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typedef struct {
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ax25_address calls[AX25_MAX_DIGIS];
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unsigned char repeated[AX25_MAX_DIGIS];
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unsigned char ndigi;
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char lastrepeat;
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} ax25_digi;
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typedef struct ax25_route {
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struct ax25_route *next;
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atomic_t ref;
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ax25_address callsign;
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struct net_device *dev;
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ax25_digi *digipeat;
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char ip_mode;
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struct timer_list timer;
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} ax25_route;
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typedef struct {
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char slave; /* slave_mode? */
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struct timer_list slave_timer; /* timeout timer */
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unsigned short slave_timeout; /* when? */
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} ax25_dama_info;
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struct ctl_table;
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typedef struct ax25_dev {
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struct ax25_dev *next;
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struct net_device *dev;
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struct net_device *forward;
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struct ctl_table *systable;
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int values[AX25_MAX_VALUES];
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#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
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ax25_dama_info dama;
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#endif
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} ax25_dev;
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typedef struct ax25_cb {
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struct hlist_node ax25_node;
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ax25_address source_addr, dest_addr;
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ax25_digi *digipeat;
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ax25_dev *ax25_dev;
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unsigned char iamdigi;
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unsigned char state, modulus, pidincl;
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unsigned short vs, vr, va;
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unsigned char condition, backoff;
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unsigned char n2, n2count;
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struct timer_list t1timer, t2timer, t3timer, idletimer;
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unsigned long t1, t2, t3, idle, rtt;
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unsigned short paclen, fragno, fraglen;
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struct sk_buff_head write_queue;
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struct sk_buff_head reseq_queue;
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struct sk_buff_head ack_queue;
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struct sk_buff_head frag_queue;
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unsigned char window;
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struct timer_list timer, dtimer;
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struct sock *sk; /* Backlink to socket */
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atomic_t refcount;
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} ax25_cb;
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#define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo)
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#define ax25_for_each(__ax25, node, list) \
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hlist_for_each_entry(__ax25, node, list, ax25_node)
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#define ax25_cb_hold(__ax25) \
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atomic_inc(&((__ax25)->refcount))
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static __inline__ void ax25_cb_put(ax25_cb *ax25)
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{
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if (atomic_dec_and_test(&ax25->refcount)) {
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if (ax25->digipeat)
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kfree(ax25->digipeat);
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kfree(ax25);
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}
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}
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2005-04-25 09:53:06 +08:00
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static inline unsigned short ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
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{
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skb->dev = dev;
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skb->pkt_type = PACKET_HOST;
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skb->mac.raw = skb->data;
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return htons(ETH_P_AX25);
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}
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2005-04-17 06:20:36 +08:00
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/* af_ax25.c */
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extern struct hlist_head ax25_list;
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extern spinlock_t ax25_list_lock;
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extern void ax25_cb_add(ax25_cb *);
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struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
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struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
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extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
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extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
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extern void ax25_destroy_socket(ax25_cb *);
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extern ax25_cb *ax25_create_cb(void);
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extern void ax25_fillin_cb(ax25_cb *, ax25_dev *);
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extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
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/* ax25_addr.c */
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extern ax25_address null_ax25_address;
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extern char *ax2asc(ax25_address *);
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extern ax25_address *asc2ax(char *);
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extern int ax25cmp(ax25_address *, ax25_address *);
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extern int ax25digicmp(ax25_digi *, ax25_digi *);
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extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *);
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extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int);
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extern int ax25_addr_size(ax25_digi *);
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extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
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/* ax25_dev.c */
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extern ax25_dev *ax25_dev_list;
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extern spinlock_t ax25_dev_lock;
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static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
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{
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return dev->ax25_ptr;
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}
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extern ax25_dev *ax25_addr_ax25dev(ax25_address *);
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extern void ax25_dev_device_up(struct net_device *);
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extern void ax25_dev_device_down(struct net_device *);
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extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
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extern struct net_device *ax25_fwd_dev(struct net_device *);
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extern void ax25_dev_free(void);
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/* ax25_ds_in.c */
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extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
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/* ax25_ds_subr.c */
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extern void ax25_ds_nr_error_recovery(ax25_cb *);
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extern void ax25_ds_enquiry_response(ax25_cb *);
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extern void ax25_ds_establish_data_link(ax25_cb *);
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extern void ax25_dev_dama_off(ax25_dev *);
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extern void ax25_dama_on(ax25_cb *);
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extern void ax25_dama_off(ax25_cb *);
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/* ax25_ds_timer.c */
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extern void ax25_ds_set_timer(ax25_dev *);
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extern void ax25_ds_del_timer(ax25_dev *);
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extern void ax25_ds_timer(ax25_cb *);
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extern void ax25_ds_t1_timeout(ax25_cb *);
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extern void ax25_ds_heartbeat_expiry(ax25_cb *);
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extern void ax25_ds_t3timer_expiry(ax25_cb *);
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extern void ax25_ds_idletimer_expiry(ax25_cb *);
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/* ax25_iface.c */
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extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *));
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extern void ax25_protocol_release(unsigned int);
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extern int ax25_linkfail_register(void (*)(ax25_cb *, int));
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extern void ax25_linkfail_release(void (*)(ax25_cb *, int));
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extern int ax25_listen_register(ax25_address *, struct net_device *);
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extern void ax25_listen_release(ax25_address *, struct net_device *);
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extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
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extern int ax25_listen_mine(ax25_address *, struct net_device *);
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extern void ax25_link_failed(ax25_cb *, int);
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extern int ax25_protocol_is_registered(unsigned int);
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/* ax25_in.c */
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extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
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extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *);
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/* ax25_ip.c */
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extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int);
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extern int ax25_rebuild_header(struct sk_buff *);
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/* ax25_out.c */
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extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
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extern void ax25_output(ax25_cb *, int, struct sk_buff *);
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extern void ax25_kick(ax25_cb *);
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extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
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2005-04-22 07:46:56 +08:00
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extern void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
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2005-04-17 06:20:36 +08:00
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extern int ax25_check_iframes_acked(ax25_cb *, unsigned short);
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/* ax25_route.c */
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extern void ax25_rt_device_down(struct net_device *);
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extern int ax25_rt_ioctl(unsigned int, void __user *);
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extern struct file_operations ax25_route_fops;
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extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
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extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *,
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struct net_device *);
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extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
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extern void ax25_rt_free(void);
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static inline void ax25_put_route(ax25_route *ax25_rt)
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{
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atomic_dec(&ax25_rt->ref);
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}
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/* ax25_std_in.c */
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extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
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/* ax25_std_subr.c */
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extern void ax25_std_nr_error_recovery(ax25_cb *);
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extern void ax25_std_establish_data_link(ax25_cb *);
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extern void ax25_std_transmit_enquiry(ax25_cb *);
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extern void ax25_std_enquiry_response(ax25_cb *);
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extern void ax25_std_timeout_response(ax25_cb *);
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/* ax25_std_timer.c */
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extern void ax25_std_heartbeat_expiry(ax25_cb *);
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extern void ax25_std_t1timer_expiry(ax25_cb *);
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extern void ax25_std_t2timer_expiry(ax25_cb *);
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extern void ax25_std_t3timer_expiry(ax25_cb *);
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extern void ax25_std_idletimer_expiry(ax25_cb *);
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/* ax25_subr.c */
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extern void ax25_clear_queues(ax25_cb *);
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extern void ax25_frames_acked(ax25_cb *, unsigned short);
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extern void ax25_requeue_frames(ax25_cb *);
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extern int ax25_validate_nr(ax25_cb *, unsigned short);
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extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
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extern void ax25_send_control(ax25_cb *, int, int, int);
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extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *);
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extern void ax25_calculate_t1(ax25_cb *);
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extern void ax25_calculate_rtt(ax25_cb *);
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extern void ax25_disconnect(ax25_cb *, int);
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/* ax25_timer.c */
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extern void ax25_start_heartbeat(ax25_cb *);
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extern void ax25_start_t1timer(ax25_cb *);
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extern void ax25_start_t2timer(ax25_cb *);
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extern void ax25_start_t3timer(ax25_cb *);
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extern void ax25_start_idletimer(ax25_cb *);
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extern void ax25_stop_heartbeat(ax25_cb *);
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extern void ax25_stop_t1timer(ax25_cb *);
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extern void ax25_stop_t2timer(ax25_cb *);
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extern void ax25_stop_t3timer(ax25_cb *);
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extern void ax25_stop_idletimer(ax25_cb *);
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extern int ax25_t1timer_running(ax25_cb *);
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extern unsigned long ax25_display_timer(struct timer_list *);
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/* ax25_uid.c */
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extern int ax25_uid_policy;
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extern ax25_address *ax25_findbyuid(uid_t);
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extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *);
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extern struct file_operations ax25_uid_fops;
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extern void ax25_uid_free(void);
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/* sysctl_net_ax25.c */
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#ifdef CONFIG_SYSCTL
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extern void ax25_register_sysctl(void);
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extern void ax25_unregister_sysctl(void);
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#else
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static inline void ax25_register_sysctl(void) {};
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static inline void ax25_unregister_sysctl(void) {};
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#endif /* CONFIG_SYSCTL */
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#endif
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