The following reply was made to PR bin/166656; it has been noted by GNATS. From: dfil...@freebsd.org (dfilter service) To: bug-follo...@freebsd.org Cc: Subject: Re: bin/166656: commit references a PR Date: Wed, 22 Aug 2012 13:53:49 +0000 (UTC)
Author: jhb Date: Wed Aug 22 13:53:37 2012 New Revision: 239564 URL: http://svn.freebsd.org/changeset/base/239564 Log: Revert r239356 and use an alternate algorithm. First, don't exit when the link goes down on an interface. Instead, teach dhclient to track changes in link state and to enter the reboot state when the link on an interface goes up causing dhclient to attempt to renew its existing lease. Second, remove the change I added to clear the old lease when dhclient exits due to an error (such as ifconfig down). If an interface is using autoconfiguration it should keep its autoconfiguration as much as possible. If the next time it needs a configuration it is able to reuse the previous autoconfiguration, then leaving the settings intact allows existing connections to survive temporary outages, etc. PR: bin/166656 MFC after: 1 month Modified: head/sbin/dhclient/dhclient.c head/sbin/dhclient/dhcpd.h Modified: head/sbin/dhclient/dhclient.c ============================================================================== --- head/sbin/dhclient/dhclient.c Wed Aug 22 08:27:37 2012 (r239563) +++ head/sbin/dhclient/dhclient.c Wed Aug 22 13:53:37 2012 (r239564) @@ -218,6 +218,7 @@ routehandler(struct protocol *p) struct sockaddr *sa; struct iaddr a; ssize_t n; + int linkstat; n = read(routefd, &msg, sizeof(msg)); rtm = (struct rt_msghdr *)msg; @@ -278,10 +279,14 @@ routehandler(struct protocol *p) ifi->name); goto die; } - if (!interface_link_status(ifi->name)) { - warning("Interface %s is down, dhclient exiting", - ifi->name); - goto die; + linkstat = interface_link_status(ifi->name); + if (linkstat != ifi->linkstat) { + debug("%s link state %s -> %s", ifi->name, + ifi->linkstat ? "up" : "down", + linkstat ? "up" : "down"); + ifi->linkstat = linkstat; + if (linkstat) + state_reboot(ifi); } break; case RTM_IFANNOUNCE: @@ -321,8 +326,6 @@ routehandler(struct protocol *p) die: script_init("FAIL", NULL); - if (ifi->client->active) - script_write_params("old_", ifi->client->active); if (ifi->client->alias) script_write_params("alias_", ifi->client->alias); script_go(); @@ -437,6 +440,7 @@ main(int argc, char *argv[]) } fprintf(stderr, " got link\n"); } + ifi->linkstat = 1; if ((nullfd = open(_PATH_DEVNULL, O_RDWR, 0)) == -1) error("cannot open %s: %m", _PATH_DEVNULL); Modified: head/sbin/dhclient/dhcpd.h ============================================================================== --- head/sbin/dhclient/dhcpd.h Wed Aug 22 08:27:37 2012 (r239563) +++ head/sbin/dhclient/dhcpd.h Wed Aug 22 13:53:37 2012 (r239564) @@ -208,6 +208,7 @@ struct interface_info { int errors; int dead; u_int16_t index; + int linkstat; }; struct timeout { _______________________________________________ svn-src-...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org" _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
