2e2e9e92bd
This adds 3 sysctls which govern the retransmission behaviour of DCCP control packets (3way handshake, feature negotiation). It removes 4 FIXMEs from the code. The close resemblance of sysctl variables to their TCP analogues is emphasised not only by their name, but also by giving them the same initial values. This is useful since there is not much practical experience with DCCP yet. Furthermore, with regard to the previous patch, it is now possible to limit the number of keepalive-Responses by setting net.dccp.default.request_retries (also a bit like in TCP). Lastly, added documentation of all existing DCCP sysctls. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/*
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* net/dccp/sysctl.c
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*
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* An implementation of the DCCP protocol
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* Arnaldo Carvalho de Melo <acme@mandriva.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License v2
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* as published by the Free Software Foundation.
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*/
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#include <linux/mm.h>
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#include <linux/sysctl.h>
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#include "dccp.h"
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#include "feat.h"
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#ifndef CONFIG_SYSCTL
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#error This file should not be compiled without CONFIG_SYSCTL defined
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#endif
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static struct ctl_table dccp_default_table[] = {
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{
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.ctl_name = NET_DCCP_DEFAULT_SEQ_WINDOW,
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.procname = "seq_window",
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.data = &dccp_feat_default_sequence_window,
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.maxlen = sizeof(dccp_feat_default_sequence_window),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_RX_CCID,
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.procname = "rx_ccid",
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.data = &dccp_feat_default_rx_ccid,
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.maxlen = sizeof(dccp_feat_default_rx_ccid),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_TX_CCID,
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.procname = "tx_ccid",
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.data = &dccp_feat_default_tx_ccid,
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.maxlen = sizeof(dccp_feat_default_tx_ccid),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_ACK_RATIO,
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.procname = "ack_ratio",
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.data = &dccp_feat_default_ack_ratio,
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.maxlen = sizeof(dccp_feat_default_ack_ratio),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_SEND_ACKVEC,
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.procname = "send_ackvec",
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.data = &dccp_feat_default_send_ack_vector,
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.maxlen = sizeof(dccp_feat_default_send_ack_vector),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_SEND_NDP,
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.procname = "send_ndp",
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.data = &dccp_feat_default_send_ndp_count,
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.maxlen = sizeof(dccp_feat_default_send_ndp_count),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_REQ_RETRIES,
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.procname = "request_retries",
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.data = &sysctl_dccp_request_retries,
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.maxlen = sizeof(sysctl_dccp_request_retries),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_RETRIES1,
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.procname = "retries1",
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.data = &sysctl_dccp_retries1,
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.maxlen = sizeof(sysctl_dccp_retries1),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.ctl_name = NET_DCCP_DEFAULT_RETRIES2,
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.procname = "retries2",
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.data = &sysctl_dccp_retries2,
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.maxlen = sizeof(sysctl_dccp_retries2),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{ .ctl_name = 0, }
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};
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static struct ctl_table dccp_table[] = {
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{
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.ctl_name = NET_DCCP_DEFAULT,
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.procname = "default",
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.mode = 0555,
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.child = dccp_default_table,
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},
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{ .ctl_name = 0, },
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};
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static struct ctl_table dccp_dir_table[] = {
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{
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.ctl_name = NET_DCCP,
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.procname = "dccp",
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.mode = 0555,
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.child = dccp_table,
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},
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{ .ctl_name = 0, },
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};
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static struct ctl_table dccp_root_table[] = {
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{
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.ctl_name = CTL_NET,
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.procname = "net",
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.mode = 0555,
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.child = dccp_dir_table,
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},
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{ .ctl_name = 0, },
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};
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static struct ctl_table_header *dccp_table_header;
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int __init dccp_sysctl_init(void)
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{
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dccp_table_header = register_sysctl_table(dccp_root_table, 1);
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return dccp_table_header != NULL ? 0 : -ENOMEM;
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}
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void dccp_sysctl_exit(void)
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{
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if (dccp_table_header != NULL) {
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unregister_sysctl_table(dccp_table_header);
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dccp_table_header = NULL;
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}
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}
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