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kernel-netlink: Allow to override xfrm_acq_expires value

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When using auto=route, current xfrm_acq_expires default value
implies that tunnel can be down for up to 165 seconds, if
other peer rejected first IKE request with an AUTH_FAILED or
NO_PROPOSAL_CHOSEN error message. These error messages are
completely normal in setups where another application
pushes configuration to both strongSwans without waiting
for acknowledgment that they have updated their configurations.

This patch allows strongswan to override xfrm_acq_expires default
value by setting charon.plugins.kernel-netlink.xfrm_acq_expires in
strongswan.conf.

Signed-off-by: Ansis Atteka <[email protected]>
This commit is contained in:
Ansis Atteka
2013-09-23 10:45:14 +02:00
committed by Martin Willi
parent 2c4d772a79
commit 255b9dac5d
2 changed files with 15 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
man/strongswan.conf.5.in
+5
View File
@@ -626,6 +626,11 @@ Set MTU of ipsecN device
.BR charon.plugins.kernel-netlink.roam_events " [yes]"
Whether to trigger roam events when interfaces, addresses or routes change
.TP
.BR charon.plugins.kernel-netlink.xfrm_acq_expires " [165]"
Lifetime of XFRM acquire state in kernel, value gets written to
/proc/sys/net/core/xfrm_acq_expires. Indirecly controls the delay of XFRM
acquire messages sent.
.TP
.BR charon.plugins.kernel-pfroute.vip_wait " [1000]"
Time in ms to wait until virtual IP addresses appear/disappear before failing.
.TP
src/libhydra/plugins/kernel_netlink/kernel_netlink_ipsec.c
+10 -6
View File
@@ -76,6 +76,9 @@
/** Default replay window size, if not set using charon.replay_window */
#define DEFAULT_REPLAY_WINDOW 32
/** Default lifetime of an acquire XFRM state (in seconds) */
#define DEFAULT_ACQUIRE_LIFETIME 165
/**
* Map the limit for bytes and packets to XFRM_INF by default
*/
@@ -2631,7 +2634,7 @@ kernel_netlink_ipsec_t *kernel_netlink_ipsec_create()
{
private_kernel_netlink_ipsec_t *this;
bool register_for_events = TRUE;
int fd;
FILE *f;
INIT(this,
.public = {
@@ -2673,12 +2676,13 @@ kernel_netlink_ipsec_t *kernel_netlink_ipsec_create()
register_for_events = FALSE;
}
/* disable lifetimes for allocated SPIs in kernel */
fd = open("/proc/sys/net/core/xfrm_acq_expires", O_WRONLY);
if (fd > 0)
f = fopen("/proc/sys/net/core/xfrm_acq_expires", "w");
if (f)
{
ignore_result(write(fd, "165", 3));
close(fd);
fprintf(f, "%u", lib->settings->get_int(lib->settings,
"%s.plugins.kernel-netlink.xfrm_acq_expires",
DEFAULT_ACQUIRE_LIFETIME, hydra->daemon));
fclose(f);
}
this->socket_xfrm = netlink_socket_create(NETLINK_XFRM);