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ipv6 addrconf: disallow rtr_solicits < -1

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This disallows setting /proc/sys/net/ipv6/conf/*/router_solicitations
to values below -1.

-1 continues to mean an unlimited number of retransmits.

Note: this depends on 'ipv6 addrconf: remove addrconf_sysctl_hop_limit()'

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maciej Żenczykowski 2016-10-07 01:00:49 -07:00 committed by David S. Miller
parent 7aa6ec2296
commit cb4a4c691e
1 changed files with 3 additions and 1 deletions
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4
net/ipv6/addrconf.c
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@ -5729,6 +5729,7 @@ int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl,
return ret; return ret;
} }
static int minus_one = -1;
static const int one = 1; static const int one = 1;
static const int two_five_five = 255; static const int two_five_five = 255;
@ -5789,7 +5790,8 @@ static const struct ctl_table addrconf_sysctl[] = {
.data = &ipv6_devconf.rtr_solicits, .data = &ipv6_devconf.rtr_solicits,
.maxlen = sizeof(int), .maxlen = sizeof(int),
.mode = 0644, .mode = 0644,
.proc_handler = proc_dointvec, .proc_handler = proc_dointvec_minmax,
.extra1 = &minus_one,
}, },
{ {
.procname = "router_solicitation_interval", .procname = "router_solicitation_interval",