Root/
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by |
4 | * the Free Software Foundation; either version 2 of the License, or |
5 | * (at your option) any later version. |
6 | * |
7 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) |
8 | */ |
9 | #include <linux/errno.h> |
10 | #include <linux/types.h> |
11 | #include <linux/socket.h> |
12 | #include <linux/in.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/timer.h> |
15 | #include <linux/string.h> |
16 | #include <linux/sockios.h> |
17 | #include <linux/net.h> |
18 | #include <net/ax25.h> |
19 | #include <linux/inet.h> |
20 | #include <linux/netdevice.h> |
21 | #include <linux/skbuff.h> |
22 | #include <net/sock.h> |
23 | #include <asm/uaccess.h> |
24 | #include <asm/system.h> |
25 | #include <linux/fcntl.h> |
26 | #include <linux/mm.h> |
27 | #include <linux/interrupt.h> |
28 | |
29 | /* |
30 | * The following routines are taken from page 170 of the 7th ARRL Computer |
31 | * Networking Conference paper, as is the whole state machine. |
32 | */ |
33 | |
34 | void ax25_std_nr_error_recovery(ax25_cb *ax25) |
35 | { |
36 | ax25_std_establish_data_link(ax25); |
37 | } |
38 | |
39 | void ax25_std_establish_data_link(ax25_cb *ax25) |
40 | { |
41 | ax25->condition = 0x00; |
42 | ax25->n2count = 0; |
43 | |
44 | if (ax25->modulus == AX25_MODULUS) |
45 | ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND); |
46 | else |
47 | ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND); |
48 | |
49 | ax25_calculate_t1(ax25); |
50 | ax25_stop_idletimer(ax25); |
51 | ax25_stop_t3timer(ax25); |
52 | ax25_stop_t2timer(ax25); |
53 | ax25_start_t1timer(ax25); |
54 | } |
55 | |
56 | void ax25_std_transmit_enquiry(ax25_cb *ax25) |
57 | { |
58 | if (ax25->condition & AX25_COND_OWN_RX_BUSY) |
59 | ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_COMMAND); |
60 | else |
61 | ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_COMMAND); |
62 | |
63 | ax25->condition &= ~AX25_COND_ACK_PENDING; |
64 | |
65 | ax25_calculate_t1(ax25); |
66 | ax25_start_t1timer(ax25); |
67 | } |
68 | |
69 | void ax25_std_enquiry_response(ax25_cb *ax25) |
70 | { |
71 | if (ax25->condition & AX25_COND_OWN_RX_BUSY) |
72 | ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_RESPONSE); |
73 | else |
74 | ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_RESPONSE); |
75 | |
76 | ax25->condition &= ~AX25_COND_ACK_PENDING; |
77 | } |
78 | |
79 | void ax25_std_timeout_response(ax25_cb *ax25) |
80 | { |
81 | if (ax25->condition & AX25_COND_OWN_RX_BUSY) |
82 | ax25_send_control(ax25, AX25_RNR, AX25_POLLOFF, AX25_RESPONSE); |
83 | else |
84 | ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE); |
85 | |
86 | ax25->condition &= ~AX25_COND_ACK_PENDING; |
87 | } |
88 |
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javiroman/ks7010
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9