common/aiccu_linux.c

   1 /**********************************************************
   2  SixXS - Automatic IPv6 Connectivity Configuration Utility
   3 ***********************************************************
   4  Copyright 2003-2005 SixXS - http://www.sixxs.net
   5 ***********************************************************
   6  common/aiccu_linux.c - AICCU Linux Abstracted functions
   7 ***********************************************************
   8  $Author: jeroen $
   9  $Id: aiccu_linux.c,v 1.15 2007-01-15 12:18:58 jeroen Exp $
  10  $Date: 2007-01-15 12:18:58 $
  11 **********************************************************/
  12
  13 #include "aiccu.h"
  14
  15 bool aiccu_os_install(void)
  16 {
  17         /* Check if IPv6 support is available */
  18         if (access("/proc/net/if_inet6", F_OK))
  19         {
  20                 /* Doing the modprobe doesn't guarantee success unfortunately */
  21                 (void)system("modprobe -q ipv6 2>/dev/null >/dev/null");
  22
  23                 /* Thus test it again */
  24                 if (access("/proc/net/if_inet6", F_OK))
  25                 {
  26                         dolog(LOG_ERR, "No IPv6 Stack found! Please check your kernel and module configuration\n");
  27                         return false;
  28                 }
  29         }
  30
  31         /* Try to load modules (SIT tunnel, TUN/TAP)
  32          * They can be kernel builtins and there is no easy
  33          * way to check if they are loaded/built except for
  34          * trying to use them and fail at that point
  35          */
  36         (void)system("modprobe -q sit 2>/dev/null >/dev/null");
  37         (void)system("modprobe -q tun 2>/dev/null >/dev/null");
  38
  39         return true;
  40 }
  41
  42 bool aiccu_os_setup(struct TIC_Tunnel *hTunnel)
  43 {
  44         if (hTunnel->uses_tundev == 0)
  45         {
  46                 aiccu_exec(
  47                         "ip tunnel add %s mode sit %s%s remote %s",
  48                         g_aiccu->ipv6_interface,
  49                         strcmp(hTunnel->sIPv4_Local, "heartbeat") == 0 ? "" : "local ",
  50                         strcmp(hTunnel->sIPv4_Local, "heartbeat") == 0 ? "" : hTunnel->sIPv4_Local,
  51                         hTunnel->sIPv4_POP);
  52         }
  53
  54         aiccu_exec(
  55                 "ip link set %s up",
  56                 g_aiccu->ipv6_interface);
  57
  58         aiccu_exec(
  59                 "ip link set mtu %u dev %s",
  60                 hTunnel->nMTU,
  61                 g_aiccu->ipv6_interface);
  62
  63         if (hTunnel->uses_tundev == 0)
  64         {
  65                 aiccu_exec(
  66                         "ip tunnel change %s ttl 64",
  67                         g_aiccu->ipv6_interface);
  68         }
  69         else
  70         {
  71                 /* Add a LinkLocal address for AYIYA tunnels */
  72                 aiccu_exec(
  73                         "ip -6 addr add %s/%u dev %s",
  74                         hTunnel->sIPv6_LinkLocal,
  75                         64,
  76                         g_aiccu->ipv6_interface);
  77         }
  78
  79         aiccu_exec(
  80                 "ip -6 addr add %s/%u dev %s",
  81                 hTunnel->sIPv6_Local,
  82                 hTunnel->nIPv6_PrefixLength,
  83                 g_aiccu->ipv6_interface);
  84
  85         if (g_aiccu->defaultroute)
  86         {
  87                 aiccu_exec(
  88                         "ip -6 ro add %s via %s dev %s",
  89                         "default",
  90                         hTunnel->sIPv6_POP,
  91                         g_aiccu->ipv6_interface);
  92         }
  93
  94         return true;
  95 }
  96
  97 void aiccu_os_reconfig(struct TIC_Tunnel *hTunnel)
  98 {
  99         if (hTunnel->uses_tundev == 0)
 100         {
 101                 aiccu_exec(
 102                         "ip tunnel change %s local %s",
 103                         g_aiccu->ipv6_interface,
 104                         hTunnel->sIPv4_Local);
 105         }
 106 }
 107
 108 void aiccu_os_delete(struct TIC_Tunnel *hTunnel)
 109 {
 110         hTunnel = hTunnel;
 111         aiccu_exec(
 112                 "ip link set %s down",
 113                 g_aiccu->ipv6_interface);
 114
 115         if (hTunnel->uses_tundev == 0)
 116         {
 117                 aiccu_exec(
 118                         "ip tunnel del %s",
 119                         g_aiccu->ipv6_interface);
 120         }
 121 }
 122