1 files changed, 110 insertions, 0 deletions

diff --git a/meta/recipes-core/busybox/busybox-1.17.3/busybox-udhcpc-no_deconfig.patch b/meta/recipes-core/busybox/busybox-1.17.3/busybox-udhcpc-no_deconfig.patch
new file mode 100644
index 0000000000..cdf56b826c
--- /dev/null
+++ b/meta/recipes-core/busybox/busybox-1.17.3/busybox-udhcpc-no_deconfig.patch
@@ -0,0 +1,110 @@
+Add a new option -D to the udhcpc client that allows for
+dhcp renewal to occur without having to down the interface
+in the process.
+
+Signed-off-by: Greg Moffatt <greg.moffatt@windriver.com>
+
+Updated to latest Busybox 1.17.3
+
+Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
+
+diff -ur busybox-1.17.3.orig/networking/udhcp/dhcpc.c busybox-1.17.3/networking/udhcp/dhcpc.c
+--- busybox-1.17.3.orig/networking/udhcp/dhcpc.c
++++ busybox-1.17.3/networking/udhcp/dhcpc.c
+@@ -35,6 +35,9 @@
+ #endif
+ #include <linux/filter.h>
+ 
++/* option whether to down the interface when reconfiguring */
++static int allow_deconfig = 1;
++
+ /* struct client_config_t client_config is in bb_common_bufsiz1 */
+ 
+ 
+@@ -709,7 +712,8 @@
+                state = RENEW_REQUESTED;
+                break;
+        case RENEW_REQUESTED: /* impatient are we? fine, square 1 */
+-               udhcp_run_script(NULL, "deconfig");
++               if (allow_deconfig)
++                       udhcp_run_script(NULL, "deconfig");
+        case REQUESTING:
+        case RELEASED:
+                change_listen_mode(LISTEN_RAW);
+@@ -733,7 +737,8 @@
+                bb_info_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");
++               if (allow_deconfig)
++                       udhcp_run_script(NULL, "deconfig");
+        }
+        bb_info_msg("Entering released state");
+ 
+@@ -836,6 +841,7 @@
+                OPT_o = 1 << 18,
+                OPT_x = 1 << 19,
+                OPT_f = 1 << 20,
++               OPT_D = 1 << 21,
+ /* The rest has variable bit positions, need to be clever */
+                OPTBIT_f = 20,
+                USE_FOR_MMU(             OPTBIT_b,)
+@@ -861,7 +867,7 @@
+ #endif
+                ;
+        IF_LONG_OPTS(applet_long_options = udhcpc_longopts;)
+-       opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:SA:O:ox:f"
++       opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:SA:O:ox:fD"
+                USE_FOR_MMU("b")
+                IF_FEATURE_UDHCPC_ARPING("a")
+                IF_FEATURE_UDHCP_PORT("P:")
+@@ -950,6 +956,9 @@
+                logmode |= LOGMODE_SYSLOG;
+        }
+ 
++       if (opt & OPT_D)
++               allow_deconfig = 0;
++
+        /* Make sure fd 0,1,2 are open */
+        bb_sanitize_stdio();
+        /* Equivalent of doing a fflush after every \n */
+@@ -964,7 +973,8 @@
+        srand(monotonic_us());
+ 
+        state = INIT_SELECTING;
+-       udhcp_run_script(NULL, "deconfig");
++       if (allow_deconfig)
++               udhcp_run_script(NULL, "deconfig");
+        change_listen_mode(LISTEN_RAW);
+        packet_num = 0;
+        timeout = 0;
+@@ -1100,7 +1110,8 @@
+                                }
+                                /* Timed out, enter init state */
+                                bb_info_msg("Lease lost, entering init state");
+-                               udhcp_run_script(NULL, "deconfig");
++                               if (allow_deconfig)
++                                       udhcp_run_script(NULL, "deconfig");
+                                state = INIT_SELECTING;
+                                /*timeout = 0; - already is */
+                                packet_num = 0;
+@@ -1246,7 +1257,8 @@
+                                                send_decline(xid, server_addr, packet.yiaddr);
+ 
+                                                if (state != REQUESTING)
+-                                                       udhcp_run_script(NULL, "deconfig");
++                                                       if (allow_deconfig)
++                                                               udhcp_run_script(NULL, "deconfig");
+                                                change_listen_mode(LISTEN_RAW);
+                                                state = INIT_SELECTING;
+                                                requested_ip = 0;
+@@ -1292,7 +1304,8 @@
+                                bb_info_msg("Received DHCP NAK");
+                                udhcp_run_script(&packet, "nak");
+                                if (state != REQUESTING)
+-                                       udhcp_run_script(NULL, "deconfig");
++                                       if (allow_deconfig)
++                                               udhcp_run_script(NULL, "deconfig");
+                                change_listen_mode(LISTEN_RAW);
+                                sleep(3); /* avoid excessive network traffic */
+                                state = INIT_SELECTING;