Package: isc-dhcp
Version: 4.3.5-3
Followup-For: Bug #863426
User: [email protected]
Usertags: origin-ubuntu artful ubuntu-patch

Dear Maintainer,

an updated isc-dhcp patch is attached, that moves the interface alias
stripping to client/dhclient.c as soon as the parameter is parsed from argv.
This allows dhclient to handle the interface name with no alias at all times.
The previous patch failed to allow dhclient to release the interface.

Thanks for considering the patch.
diff -Nru isc-dhcp-4.3.5/debian/control isc-dhcp-4.3.5/debian/control
--- isc-dhcp-4.3.5/debian/control       2017-01-19 12:11:21.000000000 -0500
+++ isc-dhcp-4.3.5/debian/control       2017-06-07 16:38:45.000000000 -0400
@@ -1,8 +1,7 @@
 Source: isc-dhcp
 Section: net
 Priority: important
-Maintainer: Ubuntu Developers <[email protected]>
-XSBC-Original-Maintainer: Debian ISC DHCP maintainers 
<[email protected]>
+Maintainer: Debian ISC DHCP maintainers 
<[email protected]>
 Uploaders: Andrew Pollock <[email protected]>, Michael Gilbert 
<[email protected]>
 Vcs-Git: https://anonscm.debian.org/pkg-dhcp/isc-dhcp.git
 Vcs-Browser: 
https://anonscm.debian.org/gitweb/?p=pkg-dhcp/isc-dhcp.git;a=summary
diff -Nru isc-dhcp-4.3.5/debian/patches/series 
isc-dhcp-4.3.5/debian/patches/series
--- isc-dhcp-4.3.5/debian/patches/series        2017-01-19 12:11:21.000000000 
-0500
+++ isc-dhcp-4.3.5/debian/patches/series        2017-06-07 16:38:38.000000000 
-0400
@@ -32,3 +32,4 @@
 dhcp-improved-xid-correct-byte-order.patch
 dhcp-4.2.4-dhclient-options-changed.patch
 ubuntu-dhcpd-conf.patch
+strip-interface-alias.patch
diff -Nru isc-dhcp-4.3.5/debian/patches/strip-interface-alias.patch 
isc-dhcp-4.3.5/debian/patches/strip-interface-alias.patch
--- isc-dhcp-4.3.5/debian/patches/strip-interface-alias.patch   1969-12-31 
19:00:00.000000000 -0500
+++ isc-dhcp-4.3.5/debian/patches/strip-interface-alias.patch   2017-06-07 
16:38:38.000000000 -0400
@@ -0,0 +1,39 @@
+Author: Dan Streetman <[email protected]>
+Description: Since isc-dhcp strips the interface alias from all
+  interfaces it enumerates, when comparing the cmdline interface
+  name to find the matching enumerated interface, the cmdline name
+  must have its alias stripped also.  Without this, DHCPv6 fails
+  when using an interface alias.
+Forwarded: yes
+Bug: [ISC bug tracking is private; bug email has been sent]
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1693819
+
+
+Index: isc-dhcp-4.3.5/client/dhclient.c
+===================================================================
+--- isc-dhcp-4.3.5.orig/client/dhclient.c
++++ isc-dhcp-4.3.5/client/dhclient.c
+@@ -447,15 +447,19 @@ main(int argc, char **argv) {
+                             " requested interface %s", argv[i]);
+               } else {
+                   struct interface_info *tmp = NULL;
++                  int len;
+ 
+                   status = interface_allocate(&tmp, MDL);
+                   if (status != ISC_R_SUCCESS)
+                       log_fatal("Can't record interface %s:%s",
+                                 argv[i], isc_result_totext(status));
+-                  if (strlen(argv[i]) >= sizeof(tmp->name))
+-                          log_fatal("%s: interface name too long (is %ld)",
+-                                    argv[i], (long)strlen(argv[i]));
+-                  strcpy(tmp->name, argv[i]);
++                  /* strip any interface alias, e.g. eth1:1 -> eth1 */
++                  len = strchrnul(argv[i], ':') - argv[i];
++                  if (len >= sizeof(tmp->name))
++                          log_fatal("%s: interface name too long (is %d)",
++                                    argv[i], len);
++                  strncpy(tmp->name, argv[i], len);
++                  tmp->name[len] = 0;
+                   if (interfaces) {
+                           interface_reference(&tmp->next,
+                                               interfaces, MDL);

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