patch to fix RHBZ 1319858, 1319859

vtun-client-sighup.patch

@@ -0,0 +1,33 @@
+When sending a SIGHUP to a vtun client process which is unable to connect
+to the remote server, it will attempt to reconnect without sleeping between
+consecutive attempts. This results in a CPU usage spike, and a flood of
+data sent to syslog.
+This patch causes the first sleep after SIGHUP to be discarded, then allows
+sleep to be used again in subsequent iterations.
+diff -NarU5 a/client.c b/client.c
+--- a/client.c	2012-07-08 01:32:57.000000000 -0400
++++ b/client.c	2016-03-21 17:17:34.111775616 -0400
+@@ -131,10 +131,11 @@
+ 
+         if( connect_t(s,(struct sockaddr *) &svr_addr, host->timeout) ){
+ 	   if (!vtun.quiet || errno != ETIMEDOUT)
+ 	      vtun_syslog(LOG_INFO,"Connect to %s failed. %s(%d)", vtun.svr_name,
+ 					strerror(errno), errno);
++	      client_term = 0;
+         } else {
+ 	   if( auth_client(s, host) ){   
+ 	      vtun_syslog(LOG_INFO,"Session %s[%s] opened",host->host,vtun.svr_name);
+ 
+  	      host->rmt_fd = s;
+@@ -143,10 +144,11 @@
+ 	      client_term = tunnel(host);
+ 
+ 	      vtun_syslog(LOG_INFO,"Session %s[%s] closed",host->host,vtun.svr_name);
+ 	   } else {
+ 	      vtun_syslog(LOG_INFO,"Connection denied by %s",vtun.svr_name);
++	      client_term = 0;
+ 	   }
+ 	}
+ 	close(s);
+ 	free_sopt(&host->sopt);
+      }

vtun.spec

@@ -1,6 +1,6 @@
 Name: vtun
 Version: 3.0.3
-Release: 11%{?dist}
+Release: 15%{?dist}
 Summary: Virtual tunnel over TCP/IP networks
 License: GPLv2+
 Group: System Environment/Daemons
@@ -10,6 +10,7 @@ Source1: vtun.socket
 Source2: vtun.service
 Source3: vtun.sysconfig
 Patch0: vtun-nostrip.patch
+Patch1: vtun-client-sighup.patch
 
 Requires(post): systemd-units
 Requires(preun): systemd-units
@@ -32,10 +33,14 @@ require modification to any kernel parts.
 %prep
 %setup -q
 %patch0 -p1
+%patch1 -p1
 
 %build
 %{__autoconf}
-%configure
+# FIXME: Package suffers from c11/inline issues.
+# Workaround by appending --std=gnu89 to CFLAGS
+# Proper fix would be to fix the source-code
+%configure CFLAGS="${RPM_OPT_FLAGS} --std=gnu89"
 make %{?_smp_mflags}
 
 %install
@@ -68,6 +73,19 @@ make install DESTDIR=%{buildroot} INSTALL_OWNER= INSTALL="/usr/bin/install -p"
 %{_mandir}/man8/vtund.8*
 
 %changelog
+* Mon Mar 21 2016 Gabriel Somlo <somlo at cmu.edu> 3.0.3-15
+- patch to fix #1319858,#1319859,#1319861
+
+* Fri Feb 05 2016 Fedora Release Engineering <releng@fedoraproject.org> - 3.0.3-14
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
+
+* Mon Jun 22 2015 Ralf Corsépius <corsepiu@fedoraproject.org> - 3.0.3-13
+- Append --stdc=gnu89 to CFLAGS (Work-around to c11/inline compatibility
+  issues. Fix FTBFS).
+
+* Fri Jun 19 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 3.0.3-12
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
+
 * Tue Dec 23 2014 Gabriel Somlo <somlo at cmu.edu> 3.0.3-11
 - enhanced service file (remove "KillMode", use default "cgroup" mode)