udhcpc: Unconditionally call deconfig script, not only if lease is active

The udhcpc script may be used to setup fallback configuration (E.G. IPv4LL,
fixed IP address, ..) that also needs to be cleaned up on release (E.G.
when SIGUSR2 is called or on shutdown with -R), so unconditionally call
deconfig.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 16 insertions, 6 deletions

diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c
index 6ff040d9e..ddf3412a0 100644
--- a/networking/udhcp/d6_dhcpc.c
+++ b/networking/udhcp/d6_dhcpc.c
@@ -800,10 +800,15 @@ static void perform_d6_release(struct in6_addr *server_ipv6, struct in6_addr *ou
         ) {
                 bb_error_msg("unicasting a release");
                 send_d6_release(server_ipv6, our_cur_ipv6); /* unicast */
-                d6_run_script(NULL, "deconfig");
         }
         bb_error_msg("entering released state");
-
+/*
+ * We can be here on: SIGUSR2,
+ * or on exit (SIGTERM) and -R "release on quit" is specified.
+ * Users requested to be notified in all cases, even if not in one
+ * of the states above.
+ */
+        d6_run_script(NULL, "deconfig");
         change_listen_mode(LISTEN_NONE);
         state = RELEASED;
 }
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 8a16e987d..bef73277a 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -1129,9 +1129,15 @@ static void perform_release(uint32_t server_addr, uint32_t requested_ip)
                 bb_error_msg("unicasting a release of %s to %s",
                                 inet_ntoa(temp_addr), buffer);
                 send_release(server_addr, requested_ip); /* unicast */
-                udhcp_run_script(NULL, "deconfig");
         }
         bb_error_msg("entering released state");
+/*
+ * We can be here on: SIGUSR2,
+ * or on exit (SIGTERM) and -R "release on quit" is specified.
+ * Users requested to be notified in all cases, even if not in one
+ * of the states above.
+ */
+        udhcp_run_script(NULL, "deconfig");
 
         change_listen_mode(LISTEN_NONE);
         state = RELEASED;
@@ -1813,9 +1819,8 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
                                         temp = udhcp_get_option(&packet, DHCP_SERVER_ID);
                                         if (!temp) {
  non_matching_svid:
-                                                log1("%s with wrong server ID, ignoring packet",
-                                                        "Received DHCP NAK"
-                                                );
+                                                log1("received DHCP NAK with wrong"
+                                                        " server ID, ignoring packet");
                                                 continue;
                                         }
                                         move_from_unaligned32(svid, temp);