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272 lines
7.7 KiB
272 lines
7.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Declarations of NET/ROM type objects. |
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* |
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* Jonathan Naylor G4KLX 9/4/95 |
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*/ |
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#ifndef _NETROM_H |
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#define _NETROM_H |
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#include <linux/netrom.h> |
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#include <linux/list.h> |
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#include <linux/slab.h> |
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#include <net/sock.h> |
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#include <linux/refcount.h> |
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#include <linux/seq_file.h> |
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#define NR_NETWORK_LEN 15 |
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#define NR_TRANSPORT_LEN 5 |
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#define NR_PROTO_IP 0x0C |
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#define NR_PROTOEXT 0x00 |
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#define NR_CONNREQ 0x01 |
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#define NR_CONNACK 0x02 |
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#define NR_DISCREQ 0x03 |
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#define NR_DISCACK 0x04 |
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#define NR_INFO 0x05 |
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#define NR_INFOACK 0x06 |
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#define NR_RESET 0x07 |
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#define NR_CHOKE_FLAG 0x80 |
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#define NR_NAK_FLAG 0x40 |
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#define NR_MORE_FLAG 0x20 |
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/* Define Link State constants. */ |
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enum { |
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NR_STATE_0, |
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NR_STATE_1, |
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NR_STATE_2, |
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NR_STATE_3 |
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}; |
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#define NR_COND_ACK_PENDING 0x01 |
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#define NR_COND_REJECT 0x02 |
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#define NR_COND_PEER_RX_BUSY 0x04 |
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#define NR_COND_OWN_RX_BUSY 0x08 |
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#define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */ |
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#define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ |
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#define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ |
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#define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ |
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#define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */ |
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#define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ |
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#define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ |
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#define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ |
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#define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ |
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#define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ |
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#define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ |
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#define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ |
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#define NR_MODULUS 256 |
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#define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ |
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#define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ |
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struct nr_sock { |
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struct sock sock; |
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ax25_address user_addr, source_addr, dest_addr; |
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struct net_device *device; |
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unsigned char my_index, my_id; |
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unsigned char your_index, your_id; |
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unsigned char state, condition, bpqext, window; |
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unsigned short vs, vr, va, vl; |
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unsigned char n2, n2count; |
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unsigned long t1, t2, t4, idle; |
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unsigned short fraglen; |
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struct timer_list t1timer; |
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struct timer_list t2timer; |
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struct timer_list t4timer; |
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struct timer_list idletimer; |
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struct sk_buff_head ack_queue; |
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struct sk_buff_head reseq_queue; |
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struct sk_buff_head frag_queue; |
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}; |
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#define nr_sk(sk) ((struct nr_sock *)(sk)) |
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struct nr_neigh { |
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struct hlist_node neigh_node; |
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ax25_address callsign; |
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ax25_digi *digipeat; |
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ax25_cb *ax25; |
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struct net_device *dev; |
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unsigned char quality; |
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unsigned char locked; |
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unsigned short count; |
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unsigned int number; |
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unsigned char failed; |
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refcount_t refcount; |
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}; |
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struct nr_route { |
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unsigned char quality; |
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unsigned char obs_count; |
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struct nr_neigh *neighbour; |
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}; |
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struct nr_node { |
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struct hlist_node node_node; |
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ax25_address callsign; |
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char mnemonic[7]; |
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unsigned char which; |
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unsigned char count; |
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struct nr_route routes[3]; |
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refcount_t refcount; |
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spinlock_t node_lock; |
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}; |
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/********************************************************************* |
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* nr_node & nr_neigh lists, refcounting and locking |
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*********************************************************************/ |
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#define nr_node_hold(__nr_node) \ |
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refcount_inc(&((__nr_node)->refcount)) |
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static __inline__ void nr_node_put(struct nr_node *nr_node) |
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{ |
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if (refcount_dec_and_test(&nr_node->refcount)) { |
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kfree(nr_node); |
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} |
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} |
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#define nr_neigh_hold(__nr_neigh) \ |
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refcount_inc(&((__nr_neigh)->refcount)) |
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static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) |
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{ |
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if (refcount_dec_and_test(&nr_neigh->refcount)) { |
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if (nr_neigh->ax25) |
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ax25_cb_put(nr_neigh->ax25); |
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kfree(nr_neigh->digipeat); |
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kfree(nr_neigh); |
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} |
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} |
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/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. |
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*/ |
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static __inline__ void nr_node_lock(struct nr_node *nr_node) |
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{ |
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nr_node_hold(nr_node); |
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spin_lock_bh(&nr_node->node_lock); |
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} |
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static __inline__ void nr_node_unlock(struct nr_node *nr_node) |
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{ |
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spin_unlock_bh(&nr_node->node_lock); |
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nr_node_put(nr_node); |
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} |
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#define nr_neigh_for_each(__nr_neigh, list) \ |
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hlist_for_each_entry(__nr_neigh, list, neigh_node) |
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#define nr_neigh_for_each_safe(__nr_neigh, node2, list) \ |
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hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node) |
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#define nr_node_for_each(__nr_node, list) \ |
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hlist_for_each_entry(__nr_node, list, node_node) |
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#define nr_node_for_each_safe(__nr_node, node2, list) \ |
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hlist_for_each_entry_safe(__nr_node, node2, list, node_node) |
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/*********************************************************************/ |
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/* af_netrom.c */ |
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extern int sysctl_netrom_default_path_quality; |
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extern int sysctl_netrom_obsolescence_count_initialiser; |
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extern int sysctl_netrom_network_ttl_initialiser; |
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extern int sysctl_netrom_transport_timeout; |
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extern int sysctl_netrom_transport_maximum_tries; |
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extern int sysctl_netrom_transport_acknowledge_delay; |
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extern int sysctl_netrom_transport_busy_delay; |
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extern int sysctl_netrom_transport_requested_window_size; |
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extern int sysctl_netrom_transport_no_activity_timeout; |
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extern int sysctl_netrom_routing_control; |
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extern int sysctl_netrom_link_fails_count; |
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extern int sysctl_netrom_reset_circuit; |
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int nr_rx_frame(struct sk_buff *, struct net_device *); |
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void nr_destroy_socket(struct sock *); |
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/* nr_dev.c */ |
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int nr_rx_ip(struct sk_buff *, struct net_device *); |
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void nr_setup(struct net_device *); |
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/* nr_in.c */ |
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int nr_process_rx_frame(struct sock *, struct sk_buff *); |
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/* nr_loopback.c */ |
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void nr_loopback_init(void); |
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void nr_loopback_clear(void); |
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int nr_loopback_queue(struct sk_buff *); |
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/* nr_out.c */ |
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void nr_output(struct sock *, struct sk_buff *); |
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void nr_send_nak_frame(struct sock *); |
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void nr_kick(struct sock *); |
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void nr_transmit_buffer(struct sock *, struct sk_buff *); |
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void nr_establish_data_link(struct sock *); |
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void nr_enquiry_response(struct sock *); |
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void nr_check_iframes_acked(struct sock *, unsigned short); |
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/* nr_route.c */ |
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void nr_rt_device_down(struct net_device *); |
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struct net_device *nr_dev_first(void); |
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struct net_device *nr_dev_get(ax25_address *); |
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int nr_rt_ioctl(unsigned int, void __user *); |
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void nr_link_failed(ax25_cb *, int); |
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int nr_route_frame(struct sk_buff *, ax25_cb *); |
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extern const struct seq_operations nr_node_seqops; |
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extern const struct seq_operations nr_neigh_seqops; |
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void nr_rt_free(void); |
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/* nr_subr.c */ |
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void nr_clear_queues(struct sock *); |
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void nr_frames_acked(struct sock *, unsigned short); |
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void nr_requeue_frames(struct sock *); |
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int nr_validate_nr(struct sock *, unsigned short); |
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int nr_in_rx_window(struct sock *, unsigned short); |
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void nr_write_internal(struct sock *, int); |
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void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags); |
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/* |
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* This routine is called when a Connect Acknowledge with the Choke Flag |
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* set is needed to refuse a connection. |
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*/ |
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#define nr_transmit_refusal(skb, mine) \ |
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do { \ |
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__nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ |
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} while (0) |
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/* |
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* This routine is called when we don't have a circuit matching an incoming |
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* NET/ROM packet. This is an G8PZT Xrouter extension. |
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*/ |
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#define nr_transmit_reset(skb, mine) \ |
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do { \ |
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__nr_transmit_reply((skb), (mine), NR_RESET); \ |
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} while (0) |
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void nr_disconnect(struct sock *, int); |
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/* nr_timer.c */ |
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void nr_init_timers(struct sock *sk); |
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void nr_start_heartbeat(struct sock *); |
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void nr_start_t1timer(struct sock *); |
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void nr_start_t2timer(struct sock *); |
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void nr_start_t4timer(struct sock *); |
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void nr_start_idletimer(struct sock *); |
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void nr_stop_heartbeat(struct sock *); |
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void nr_stop_t1timer(struct sock *); |
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void nr_stop_t2timer(struct sock *); |
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void nr_stop_t4timer(struct sock *); |
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void nr_stop_idletimer(struct sock *); |
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int nr_t1timer_running(struct sock *); |
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/* sysctl_net_netrom.c */ |
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int nr_register_sysctl(void); |
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void nr_unregister_sysctl(void); |
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#endif
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