dccp: fix return value for sequence-invalid packets
[linux-2.6.git] / net / dccp / sysctl.c
1 /*
2  *  net/dccp/sysctl.c
3  *
4  *  An implementation of the DCCP protocol
5  *  Arnaldo Carvalho de Melo <acme@mandriva.com>
6  *
7  *      This program is free software; you can redistribute it and/or
8  *      modify it under the terms of the GNU General Public License v2
9  *      as published by the Free Software Foundation.
10  */
11
12 #include <linux/mm.h>
13 #include <linux/sysctl.h>
14 #include "dccp.h"
15 #include "feat.h"
16
17 #ifndef CONFIG_SYSCTL
18 #error This file should not be compiled without CONFIG_SYSCTL defined
19 #endif
20
21 /* Boundary values */
22 static int              zero     = 0,
23                         u8_max   = 0xFF;
24 static unsigned long    seqw_min = 32;
25
26 static struct ctl_table dccp_default_table[] = {
27         {
28                 .procname       = "seq_window",
29                 .data           = &sysctl_dccp_sequence_window,
30                 .maxlen         = sizeof(sysctl_dccp_sequence_window),
31                 .mode           = 0644,
32                 .proc_handler   = proc_doulongvec_minmax,
33                 .extra1         = &seqw_min,            /* RFC 4340, 7.5.2 */
34         },
35         {
36                 .procname       = "rx_ccid",
37                 .data           = &sysctl_dccp_rx_ccid,
38                 .maxlen         = sizeof(sysctl_dccp_rx_ccid),
39                 .mode           = 0644,
40                 .proc_handler   = proc_dointvec_minmax,
41                 .extra1         = &zero,
42                 .extra2         = &u8_max,              /* RFC 4340, 10. */
43         },
44         {
45                 .procname       = "tx_ccid",
46                 .data           = &sysctl_dccp_tx_ccid,
47                 .maxlen         = sizeof(sysctl_dccp_tx_ccid),
48                 .mode           = 0644,
49                 .proc_handler   = proc_dointvec_minmax,
50                 .extra1         = &zero,
51                 .extra2         = &u8_max,              /* RFC 4340, 10. */
52         },
53         {
54                 .procname       = "request_retries",
55                 .data           = &sysctl_dccp_request_retries,
56                 .maxlen         = sizeof(sysctl_dccp_request_retries),
57                 .mode           = 0644,
58                 .proc_handler   = proc_dointvec_minmax,
59                 .extra1         = &zero,
60                 .extra2         = &u8_max,
61         },
62         {
63                 .procname       = "retries1",
64                 .data           = &sysctl_dccp_retries1,
65                 .maxlen         = sizeof(sysctl_dccp_retries1),
66                 .mode           = 0644,
67                 .proc_handler   = proc_dointvec_minmax,
68                 .extra1         = &zero,
69                 .extra2         = &u8_max,
70         },
71         {
72                 .procname       = "retries2",
73                 .data           = &sysctl_dccp_retries2,
74                 .maxlen         = sizeof(sysctl_dccp_retries2),
75                 .mode           = 0644,
76                 .proc_handler   = proc_dointvec_minmax,
77                 .extra1         = &zero,
78                 .extra2         = &u8_max,
79         },
80         {
81                 .procname       = "tx_qlen",
82                 .data           = &sysctl_dccp_tx_qlen,
83                 .maxlen         = sizeof(sysctl_dccp_tx_qlen),
84                 .mode           = 0644,
85                 .proc_handler   = proc_dointvec_minmax,
86                 .extra1         = &zero,
87         },
88         {
89                 .procname       = "sync_ratelimit",
90                 .data           = &sysctl_dccp_sync_ratelimit,
91                 .maxlen         = sizeof(sysctl_dccp_sync_ratelimit),
92                 .mode           = 0644,
93                 .proc_handler   = proc_dointvec_ms_jiffies,
94         },
95
96         { }
97 };
98
99 static struct ctl_path dccp_path[] = {
100         { .procname = "net", },
101         { .procname = "dccp", },
102         { .procname = "default", },
103         { }
104 };
105
106 static struct ctl_table_header *dccp_table_header;
107
108 int __init dccp_sysctl_init(void)
109 {
110         dccp_table_header = register_sysctl_paths(dccp_path,
111                         dccp_default_table);
112
113         return dccp_table_header != NULL ? 0 : -ENOMEM;
114 }
115
116 void dccp_sysctl_exit(void)
117 {
118         if (dccp_table_header != NULL) {
119                 unregister_sysctl_table(dccp_table_header);
120                 dccp_table_header = NULL;
121         }
122 }