File: /usr/src/linux/net/ax25/sysctl_net_ax25.c
1 /* -*- linux-c -*-
2 * sysctl_net_ax25.c: sysctl interface to net AX.25 subsystem.
3 *
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/ax25 directory entry (empty =) ). [MS]
6 */
7
8 #include <linux/config.h>
9 #include <linux/mm.h>
10 #include <linux/sysctl.h>
11 #include <net/ax25.h>
12
13 static int min_ipdefmode[] = {0}, max_ipdefmode[] = {1};
14 static int min_axdefmode[] = {0}, max_axdefmode[] = {1};
15 static int min_backoff[] = {0}, max_backoff[] = {2};
16 static int min_conmode[] = {0}, max_conmode[] = {2};
17 static int min_window[] = {1}, max_window[] = {7};
18 static int min_ewindow[] = {1}, max_ewindow[] = {63};
19 static int min_t1[] = {1}, max_t1[] = {30 * HZ};
20 static int min_t2[] = {1}, max_t2[] = {20 * HZ};
21 static int min_t3[] = {0}, max_t3[] = {3600 * HZ};
22 static int min_idle[] = {0}, max_idle[] = {65535 * HZ};
23 static int min_n2[] = {1}, max_n2[] = {31};
24 static int min_paclen[] = {1}, max_paclen[] = {512};
25 static int min_proto[] = {0}, max_proto[] = {3};
26 static int min_ds_timeout[] = {0}, max_ds_timeout[] = {65535 * HZ};
27
28 static struct ctl_table_header *ax25_table_header;
29
30 static ctl_table *ax25_table;
31 static int ax25_table_size;
32
33 static ctl_table ax25_dir_table[] = {
34 {NET_AX25, "ax25", NULL, 0, 0555, NULL},
35 {0}
36 };
37
38 static ctl_table ax25_root_table[] = {
39 {CTL_NET, "net", NULL, 0, 0555, ax25_dir_table},
40 {0}
41 };
42
43 static const ctl_table ax25_param_table[] = {
44 {NET_AX25_IP_DEFAULT_MODE, "ip_default_mode",
45 NULL, sizeof(int), 0644, NULL,
46 &proc_dointvec_minmax, &sysctl_intvec, NULL,
47 &min_ipdefmode, &max_ipdefmode},
48 {NET_AX25_DEFAULT_MODE, "ax25_default_mode",
49 NULL, sizeof(int), 0644, NULL,
50 &proc_dointvec_minmax, &sysctl_intvec, NULL,
51 &min_axdefmode, &max_axdefmode},
52 {NET_AX25_BACKOFF_TYPE, "backoff_type",
53 NULL, sizeof(int), 0644, NULL,
54 &proc_dointvec_minmax, &sysctl_intvec, NULL,
55 &min_backoff, &max_backoff},
56 {NET_AX25_CONNECT_MODE, "connect_mode",
57 NULL, sizeof(int), 0644, NULL,
58 &proc_dointvec_minmax, &sysctl_intvec, NULL,
59 &min_conmode, &max_conmode},
60 {NET_AX25_STANDARD_WINDOW, "standard_window_size",
61 NULL, sizeof(int), 0644, NULL,
62 &proc_dointvec_minmax, &sysctl_intvec, NULL,
63 &min_window, &max_window},
64 {NET_AX25_EXTENDED_WINDOW, "extended_window_size",
65 NULL, sizeof(int), 0644, NULL,
66 &proc_dointvec_minmax, &sysctl_intvec, NULL,
67 &min_ewindow, &max_ewindow},
68 {NET_AX25_T1_TIMEOUT, "t1_timeout",
69 NULL, sizeof(int), 0644, NULL,
70 &proc_dointvec_minmax, &sysctl_intvec, NULL,
71 &min_t1, &max_t1},
72 {NET_AX25_T2_TIMEOUT, "t2_timeout",
73 NULL, sizeof(int), 0644, NULL,
74 &proc_dointvec_minmax, &sysctl_intvec, NULL,
75 &min_t2, &max_t2},
76 {NET_AX25_T3_TIMEOUT, "t3_timeout",
77 NULL, sizeof(int), 0644, NULL,
78 &proc_dointvec_minmax, &sysctl_intvec, NULL,
79 &min_t3, &max_t3},
80 {NET_AX25_IDLE_TIMEOUT, "idle_timeout",
81 NULL, sizeof(int), 0644, NULL,
82 &proc_dointvec_minmax, &sysctl_intvec, NULL,
83 &min_idle, &max_idle},
84 {NET_AX25_N2, "maximum_retry_count",
85 NULL, sizeof(int), 0644, NULL,
86 &proc_dointvec_minmax, &sysctl_intvec, NULL,
87 &min_n2, &max_n2},
88 {NET_AX25_PACLEN, "maximum_packet_length",
89 NULL, sizeof(int), 0644, NULL,
90 &proc_dointvec_minmax, &sysctl_intvec, NULL,
91 &min_paclen, &max_paclen},
92 {NET_AX25_PROTOCOL, "protocol",
93 NULL, sizeof(int), 0644, NULL,
94 &proc_dointvec_minmax, &sysctl_intvec, NULL,
95 &min_proto, &max_proto},
96 {NET_AX25_DAMA_SLAVE_TIMEOUT, "dama_slave_timeout",
97 NULL, sizeof(int), 0644, NULL,
98 &proc_dointvec_minmax, &sysctl_intvec, NULL,
99 &min_ds_timeout, &max_ds_timeout},
100 {0} /* that's all, folks! */
101 };
102
103 void ax25_register_sysctl(void)
104 {
105 ax25_dev *ax25_dev;
106 int n, k;
107
108 for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
109 ax25_table_size += sizeof(ctl_table);
110
111 if ((ax25_table = kmalloc(ax25_table_size, GFP_ATOMIC)) == NULL)
112 return;
113
114 memset(ax25_table, 0x00, ax25_table_size);
115
116 for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
117 ctl_table *child = kmalloc(sizeof(ax25_param_table), GFP_ATOMIC);
118 if (!child) {
119 while (n--)
120 kfree(ax25_table[n].child);
121 kfree(ax25_table);
122 return;
123 }
124 memcpy(child, ax25_param_table, sizeof(ax25_param_table));
125 ax25_table[n].child = ax25_dev->systable = child;
126 ax25_table[n].ctl_name = n + 1;
127 ax25_table[n].procname = ax25_dev->dev->name;
128 ax25_table[n].mode = 0555;
129
130 #ifndef CONFIG_AX25_DAMA_SLAVE
131 /*
132 * We do not wish to have a representation of this parameter
133 * in /proc/sys/ when configured *not* to include the
134 * AX.25 DAMA slave code, do we?
135 */
136
137 child[AX25_VALUES_DS_TIMEOUT].procname = NULL;
138 #endif
139
140 child[AX25_MAX_VALUES].ctl_name = 0; /* just in case... */
141
142 for (k = 0; k < AX25_MAX_VALUES; k++)
143 child[k].data = &ax25_dev->values[k];
144
145 n++;
146 }
147
148 ax25_dir_table[0].child = ax25_table;
149
150 ax25_table_header = register_sysctl_table(ax25_root_table, 1);
151 }
152
153 void ax25_unregister_sysctl(void)
154 {
155 ctl_table *p;
156 unregister_sysctl_table(ax25_table_header);
157
158 ax25_dir_table[0].child = NULL;
159 for (p = ax25_table; p->ctl_name; p++)
160 kfree(p->child);
161 kfree(ax25_table);
162 }
163