[Midnightbsd-cvs] src [8834] trunk/sbin/dhclient: teach dhclient to track changes in link state

[laffer1 at midnightbsd.org]

Revision: 8834
          http://svnweb.midnightbsd.org/src/?rev=8834
Author:   laffer1
Date:     2016-09-25 23:59:24 -0400 (Sun, 25 Sep 2016)
Log Message:
-----------
teach dhclient to track changes in link state

Modified Paths:
--------------
    trunk/sbin/dhclient/dhclient.c
    trunk/sbin/dhclient/dhcpd.h

Modified: trunk/sbin/dhclient/dhclient.c
===================================================================
--- trunk/sbin/dhclient/dhclient.c	2016-09-26 03:58:46 UTC (rev 8833)
+++ trunk/sbin/dhclient/dhclient.c	2016-09-26 03:59:24 UTC (rev 8834)
@@ -218,6 +218,7 @@
 	struct sockaddr *sa;
 	struct iaddr a;
 	ssize_t n;
+	int linkstat;
 
 	n = read(routefd, &msg, sizeof(msg));
 	rtm = (struct rt_msghdr *)msg;
@@ -278,6 +279,15 @@
 			    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:
 		ifan = (struct if_announcemsghdr *)rtm;
@@ -430,6 +440,7 @@
 		}
 		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: trunk/sbin/dhclient/dhcpd.h
===================================================================
--- trunk/sbin/dhclient/dhcpd.h	2016-09-26 03:58:46 UTC (rev 8833)
+++ trunk/sbin/dhclient/dhcpd.h	2016-09-26 03:59:24 UTC (rev 8834)
@@ -208,6 +208,7 @@
 	int			 errors;
 	int			 dead;
 	u_int16_t		 index;
+	int			 linkstat;
 };
 
 struct timeout {