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DHCP: DECLINE address on ARP defend failure

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Also, drop the lease.
This should get us a new address from the DHCP server when we
re-enter DISCOVER to avoid looping on the same address and fail
again.
This commit is contained in:
Roy Marples 2023-12-24 12:07:25 +00:00
parent e65e82a58d
commit 8ab7ca1eb4
1 changed files with 8 additions and 0 deletions
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8
src/dhcp.c
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@ -1944,7 +1944,11 @@ dhcp_expire(void *arg)
static void
dhcp_decline(struct interface *ifp)
{
struct dhcp_state *state = D_STATE(ifp);
// Set the expired state so we send over BPF as this could be
// an address defence failure.
state->added |= STATE_EXPIRED;
send_message(ifp, DHCP_DECLINE, NULL);
}
#endif
@ -2098,8 +2102,12 @@ static void
dhcp_arp_defend_failed(struct arp_state *astate)
{
struct interface *ifp = astate->iface;
struct dhcp_state *state = D_STATE(ifp);
if (!(ifp->options->options & (DHCPCD_INFORM | DHCPCD_STATIC)))
dhcp_decline(ifp);
dhcp_drop(ifp, "EXPIRED");
dhcp_unlink(ifp->ctx, state->leasefile);
dhcp_start1(ifp);
}
#endif