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nic_router: fix link state on dhcp server reconfig

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When reconfiguring the NIC router modifies the information that DHCP clients
received through a DHCP server of the NIC router, the link state of the
correspodning interface has to do a "down-up" sequence. This provides a signal
to the DHCP clients to redo DHCP, receive the new information and update
accordingly.

Fixes #3931
This commit is contained in:
Martin Stein 2020-11-17 13:00:27 +01:00 committed by Norman Feske
parent b0327d0544
commit 8d8edaea5d
1 changed files with 7 additions and 0 deletions
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7
repos/os/src/server/nic_router/interface.cc
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@ -1861,6 +1861,7 @@ void Interface::_update_icmp_links(Domain &cln_dom)
void Interface::_update_dhcp_allocations(Domain &old_domain,
Domain &new_domain)
{
bool dhcp_clients_outdated { false };
try {
Dhcp_server &old_dhcp_srv = old_domain.dhcp_server();
Dhcp_server &new_dhcp_srv = new_domain.dhcp_server();
@ -1890,6 +1891,7 @@ void Interface::_update_dhcp_allocations(Domain &old_domain,
}
}
/* dismiss DHCP allocation */
dhcp_clients_outdated = true;
_dhcp_allocations.remove(allocation);
_destroy_dhcp_allocation(allocation, old_domain);
});
@ -1897,6 +1899,7 @@ void Interface::_update_dhcp_allocations(Domain &old_domain,
catch (Pointer<Dhcp_server>::Invalid) {
/* dismiss all DHCP allocations */
dhcp_clients_outdated = true;
while (Dhcp_allocation *allocation = _dhcp_allocations.first()) {
if (_config().verbose()) {
log("[", new_domain, "] dismiss DHCP allocation: ",
@ -1906,6 +1909,10 @@ void Interface::_update_dhcp_allocations(Domain &old_domain,
_destroy_dhcp_allocation(*allocation, old_domain);
}
}
if (dhcp_clients_outdated) {
_policy.interface_unready();
_policy.interface_ready();
}
}