1 Introduction

Installer Cisco VPN Client sur un Linux c'est une tannée !! C'est pourquoi j'ai décidé de faire une documentation ou il n'y a qu'à faire copier / coller.

2 Prérequis

Il vous faudra tout ce qu'il faut pour compiler (gcc, g++...) :

yum

yum install gcc glibc

3 Installation

On va télécharger une version 4 :

wget

wget http://projects.tuxx-home.at/ciscovpn/clients/linux/4.8.02/vpnclient-linux-x86_64-4.8.02.0030-k9.tar.gz

On décompresse tout ce petit monde :

tar

tar -xzvf vpnclient-linux-x86_64-4.8.02.0030-k9.tar.gz
cd vpnclient

On insère le patch suivant pour la compatibilité du 64 bits :

vpnclient-linux-4.8.02-64bit.patch

diff -urN vpnclient.orig/Makefile vpnclient/Makefile
--- vpnclient.orig/Makefile	2008-06-23 17:59:12.000000000 +0100
+++ vpnclient/Makefile	2008-07-09 23:16:54.000000000 +0100
@@ -12,7 +12,9 @@
 SOURCE_OBJS := linuxcniapi.o frag.o IPSecDrvOS_linux.o interceptor.o linuxkernelapi.o
 
 ifeq ($(SUBARCH),x86_64)
-CFLAGS += -mcmodel=kernel -mno-red-zone
+# Must NOT fiddle with CFLAGS
+# CFLAGS += -mcmodel=kernel -mno-red-zone
+EXTRA_CFLAGS += -mcmodel=kernel -mno-red-zone
 NO_SOURCE_OBJS := libdriver64.so
 else
 NO_SOURCE_OBJS := libdriver.so
diff -urN vpnclient.orig/frag.c vpnclient/frag.c
--- vpnclient.orig/frag.c	2008-06-23 17:59:12.000000000 +0100
+++ vpnclient/frag.c	2008-07-09 23:16:54.000000000 +0100
@@ -22,7 +22,9 @@
 #include "frag.h"
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-#define SKB_IPHDR(skb) ((struct iphdr*)skb->network_header)
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ */
+#define SKB_IPHDR(skb) ((struct iphdr*)skb_network_header)
 #else
 #define SKB_IPHDR(skb) skb->nh.iph
 #endif
diff -urN vpnclient.orig/interceptor.c vpnclient/interceptor.c
--- vpnclient.orig/interceptor.c	2008-06-23 17:59:12.000000000 +0100
+++ vpnclient/interceptor.c	2008-07-09 23:34:51.000000000 +0100
@@ -637,19 +637,30 @@
 
     reset_inject_status(&pBinding->recv_stat);
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-    if (skb->mac_header)
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ */
+    if (skb_mac_header_was_set(skb))
 #else
     if (skb->mac.raw)
 #endif
     {
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-        hard_header_len = skb->data - skb->mac_header;
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ */
+        hard_header_len = skb->data - skb_mac_header(skb);
 #else
         hard_header_len = skb->data - skb->mac.raw;
 #endif
         if ((hard_header_len < 0) || (hard_header_len > skb_headroom(skb)))
         {
             printk(KERN_DEBUG "bad hh len %d\n", hard_header_len);
+
+            printk(KERN_DEBUG "bad hh len %d, mac: %d, data: %p, head: %p\n",
+                hard_header_len,
+                skb->mac_header,    /* actualy ptr in 32-bit */
+                skb->data,
+                skb->head);
+
             hard_header_len = 0;
         }
     }
@@ -664,7 +675,9 @@
     {
     case ETH_HLEN:
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-        CniNewFragment(ETH_HLEN, skb->mac_header, &MacHdr, CNI_USE_BUFFER);
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ */
+        CniNewFragment(ETH_HLEN, skb_mac_header(skb), &MacHdr, CNI_USE_BUFFER);
 #else
         CniNewFragment(ETH_HLEN, skb->mac.raw, &MacHdr, CNI_USE_BUFFER);
 #endif
@@ -782,7 +795,9 @@
 #endif //LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
     reset_inject_status(&pBinding->send_stat);
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-    hard_header_len = skb->network_header - skb->data;
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ */
+    hard_header_len = skb_network_header(skb) - skb->data;
 #else
     hard_header_len = skb->nh.raw - skb->data;
 #endif
diff -urN vpnclient.orig/linuxcniapi.c vpnclient/linuxcniapi.c
--- vpnclient.orig/linuxcniapi.c	2008-06-23 17:59:12.000000000 +0100
+++ vpnclient/linuxcniapi.c	2008-07-09 23:16:54.000000000 +0100
@@ -338,8 +338,12 @@
     skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-    skb->network_header = (sk_buff_data_t) skb->data;
-    skb->mac_header = (sk_buff_data_t)pMac;
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ * We have to use (pMac - skb->data) to get an offset.
+ * We need to cast ptrs to byte ptrs and take the difference.
+ */
+    skb_reset_network_header(skb);
+    skb_set_mac_header(skb, (int)((void *)pMac - (void *)skb->data));
 #else
     skb->nh.iph = (struct iphdr *) skb->data;
     skb->mac.raw = pMac;
@@ -478,8 +482,12 @@
     skb->dev = pBinding->pDevice;
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-    skb->mac_header = (sk_buff_data_t)pMac;
-    skb->network_header = (sk_buff_data_t)pIP;
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ * We have to use (pIP/pMac - skb->data) to get an offset.
+ * We need to cast ptrs to byte ptrs and take the difference.
+ */
+    skb_set_mac_header(skb, (int)((void *)pMac - (void *)skb->data));
+    skb_set_network_header(skb, (int)((void *)pIP - (void *)skb->data));
 #else
     skb->mac.raw = pMac;
     skb->nh.raw = pIP;
@@ -487,8 +495,13 @@
 
     /*ip header length is in 32bit words */
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-    skb->transport_header = (sk_buff_data_t)
-      (pIP + (((struct iphdr*)(skb->network_header))->ihl * 4));
+/* 2.6.22 added an inline function for 32-/64-bit usage here, so use it.
+ * We have to use (pIP - skb->data) to get an offset.
+ * We need to cast ptrs to byte ptrs and take the difference.
+ */
+    skb_set_transport_header(skb,
+        ((int)((void *)pIP - (void *)skb->data) +
+           (((struct iphdr*)(skb_network_header(skb)))->ihl * 4)));
 #else
     skb->h.raw = pIP + (skb->nh.iph->ihl * 4);
 #endif
diff -urN vpnclient.orig/linuxkernelapi.c vpnclient/linuxkernelapi.c
--- vpnclient.orig/linuxkernelapi.c	2008-06-23 17:59:12.000000000 +0100
+++ vpnclient/linuxkernelapi.c	2008-07-09 23:16:54.000000000 +0100
@@ -9,7 +9,10 @@
     void*rc = kmalloc(size, GFP_ATOMIC);
     if(NULL == rc)
     {
-        printk("<1> os_malloc size %d failed\n",size);
+/* Allow for 32- or 64-bit size        
+ *        printk("<1> os_malloc size %d failed\n",size);
+ */
+        printk("<1> os_malloc size %ld failed\n", (long)size);
     }
 
     return rc;

Et celui là pour les noyaux au dessus de 2.6.31 :

vpnclient-linux-2.6.31-final.diff

diff -uBbr vpnclient.orig/interceptor.c vpnclient/interceptor.c
--- vpnclient.orig/interceptor.c	2009-10-07 20:22:56.000000000 +0200
+++ vpnclient/interceptor.c	2009-10-07 20:28:48.000000000 +0200
@@ -120,6 +120,14 @@
     .notifier_call = handle_netdev_event,
 };
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
+static const struct net_device_ops vpn_netdev_ops = {
+ .ndo_start_xmit = interceptor_tx,
+ .ndo_get_stats = interceptor_stats,
+ .ndo_do_ioctl = interceptor_ioctl,
+};
+#endif
+
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
 static int
 #else
@@ -128,10 +136,13 @@
 interceptor_init(struct net_device *dev)
 {
     ether_setup(dev);
-
+    #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
+    dev->netdev_ops = &vpn_netdev_ops;
+    #else
     dev->hard_start_xmit = interceptor_tx;
     dev->get_stats = interceptor_stats;
     dev->do_ioctl = interceptor_ioctl;
+    #endif
 
     dev->mtu = ETH_DATA_LEN-MTU_REDUCTION;
     kernel_memcpy(dev->dev_addr, interceptor_eth_addr,ETH_ALEN);
@@ -268,8 +279,13 @@
     Bindings[i].original_mtu = dev->mtu;
 
     /*replace the original send function with our send function */
+    #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
+    Bindings[i].InjectSend = dev->netdev_ops->ndo_start_xmit;
+    dev->netdev_ops->ndo_start_xmit = replacement_dev_xmit;
+    #else
     Bindings[i].InjectSend = dev->hard_start_xmit;
     dev->hard_start_xmit = replacement_dev_xmit;
+    #endif
 
     /*copy in the ip packet handler function and packet type struct */
     Bindings[i].InjectReceive = original_ip_handler.orig_handler_func;
@@ -291,7 +307,11 @@
     if (b)
     {   
         rc = 0;
+        #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
+        dev->netdev_ops->ndo_start_xmit = b->InjectSend;
+        #else
         dev->hard_start_xmit = b->InjectSend;
+        #endif
         kernel_memset(b, 0, sizeof(BINDING));
     }
     else

On patch ensuite :

patch

patch < vpnclient-linux-4.8.02-64bit.patch 
patch < vpnclient-linux-2.6.31-final.diff

Les 2 dernières modifs pour la route :

sed

sed -i 's/^CFLAGS/EXTRA_CFLAGS/' Makefile
sed -i 's/const\ struct\ net_device_ops\ \*netdev_ops;/struct\ net_device_ops\ \*netdev_ops;/' `find /usr/src -name netdevice.h`

Et ensuite on peut enfin lancer l'installation :

./vpn_install

> ./vpn_install
Cisco Systems VPN Client Version 4.8.02 (0030) Linux Installer
Copyright (C) 1998-2006 Cisco Systems, Inc. All Rights Reserved.
By installing this product you agree that you have read the
license.txt file (The VPN Client license) and will comply with
its terms.
Directory where binaries will be installed [/usr/local/bin]
Automatically start the VPN service at boot time [yes]
In order to build the VPN kernel module, you must have the
kernel headers for the version of the kernel you are running.
Directory containing linux kernel source code [/lib/modules/2.6.32-131.0.15.el6.x86_64/build]
* Binaries will be installed in "/usr/local/bin".
* Modules will be installed in "/lib/modules/2.6.32-131.0.15.el6.x86_64/CiscoVPN".
* The VPN service will be started AUTOMATICALLY at boot time.
* Kernel source from "/lib/modules/2.6.32-131.0.15.el6.x86_64/build" will be used to build the module.
Is the above correct [y]
Making module
make -C /lib/modules/2.6.32-131.0.15.el6.x86_64/build SUBDIRS=/root/test/vpnclient modules
make[1]: Entering directory `/usr/src/kernels/2.6.32-131.0.15.el6.x86_64'
CC [M] /root/test/vpnclient/linuxcniapi.o
CC [M] /root/test/vpnclient/frag.o
CC [M] /root/test/vpnclient/interceptor.o
/root/test/vpnclient/interceptor.c: In function ‘interceptor_init’:
/root/test/vpnclient/interceptor.c:140: warning: assignment discards qualifiers from pointer target type
CC [M] /root/test/vpnclient/linuxkernelapi.o
LD [M] /root/test/vpnclient/cisco_ipsec.o
Building modules, stage 2.
MODPOST 1 modules
WARNING: could not find /root/test/vpnclient/.libdriver64.so.cmd for /root/test/vpnclient/libdriver64.so
CC /root/test/vpnclient/cisco_ipsec.mod.o
LD [M] /root/test/vpnclient/cisco_ipsec.ko.unsigned
NO SIGN [M] /root/test/vpnclient/cisco_ipsec.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.32-131.0.15.el6.x86_64'
Create module directory "/lib/modules/2.6.32-131.0.15.el6.x86_64/CiscoVPN".
Copying module to directory "/lib/modules/2.6.32-131.0.15.el6.x86_64/CiscoVPN".
Already have group 'bin'
Creating start/stop script "/etc/init.d/vpnclient_init".
/etc/init.d/vpnclient_init
Enabling start/stop script for run level 3,4 and 5.
Creating global config /etc/opt/cisco-vpnclient
Installing license.txt (VPN Client license) in "/opt/cisco-vpnclient/":
/opt/cisco-vpnclient/license.txt
Installing bundled user profiles in "/etc/opt/cisco-vpnclient/Profiles/":
* New Profiles : sample
Copying binaries to directory "/opt/cisco-vpnclient/bin".
Adding symlinks to "/usr/local/bin".
/opt/cisco-vpnclient/bin/vpnclient
/opt/cisco-vpnclient/bin/cisco_cert_mgr
/opt/cisco-vpnclient/bin/ipseclog
Copying setuid binaries to directory "/opt/cisco-vpnclient/bin".
/opt/cisco-vpnclient/bin/cvpnd
Copying libraries to directory "/opt/cisco-vpnclient/lib".
/opt/cisco-vpnclient/lib/libvpnapi.so
Copying header files to directory "/opt/cisco-vpnclient/include".
/opt/cisco-vpnclient/include/vpnapi.h
Setting permissions.
/opt/cisco-vpnclient/bin/cvpnd (setuid root)
/opt/cisco-vpnclient (group bin readable)
/etc/opt/cisco-vpnclient (group bin readable)
/etc/opt/cisco-vpnclient/Profiles (group bin readable)
/etc/opt/cisco-vpnclient/Certificates (group bin readable)
* You may wish to change these permissions to restrict access to root.
* You must run "/etc/init.d/vpnclient_init start" before using the client.
* This script will be run AUTOMATICALLY every time you reboot your computer.

4 Ressources

http://micro.stanford.edu/wiki/How_to_install_and_configure_the_Cisco_VPN_client_on_a_Linux_computer
http://www.lamnk.com/blog/vpn/how-to-install-cisco-vpn-client-on-ubuntu-jaunty-jackalope-and-karmic-koala-64-bit/
http://forum.tuxx-home.at/viewtopic.php?f=15&t=957



Software version	4.8.02
Operating System	RHEL 6.2
Website	Cisco Website
Last Update	06/04/2012
Others

Cisco VPN Client : Installation sur une Red Hat 6

Contents

1 Introduction

2 Prérequis

3 Installation

4 Ressources

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