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         char buffer[1024];
  45
  46         if (hTunnel->uses_tundev == 0)
  47         {
  48                 aiccu_exec(
  49                         "ip tunnel add %s mode sit %s%s remote %s",
  50                         g_aiccu->ipv6_interface,
  51                         strcmp(hTunnel->sIPv4_Local, "heartbeat") == 0 ? "" : "local ",
  52                         strcmp(hTunnel->sIPv4_Local, "heartbeat") == 0 ? "" : hTunnel->sIPv4_Local,
  53                         hTunnel->sIPv4_POP);
  54         }
  55
  56         aiccu_exec(
  57                 "ip link set %s up",
  58                 g_aiccu->ipv6_interface);
  59
  60         aiccu_exec(
  61                 "ip link set mtu %u dev %s",
  62                 hTunnel->nMTU,
  63                 g_aiccu->ipv6_interface);
  64
  65         if (hTunnel->uses_tundev == 0)
  66         {
  67                 aiccu_exec(
  68                         "ip tunnel change %s ttl 64",
  69                         g_aiccu->ipv6_interface);
  70         }
  71         else
  72         {
  73                 /* Add a LinkLocal address for AYIYA tunnels */
  74                 aiccu_exec(
  75                         "ip -6 addr add %s/%u dev %s",
  76                         hTunnel->sIPv6_LinkLocal,
  77                         64,
  78                         g_aiccu->ipv6_interface);
  79         }
  80
  81         aiccu_exec(
  82                 "ip -6 addr add %s/%u dev %s",
  83                 hTunnel->sIPv6_Local,
  84                 hTunnel->nIPv6_PrefixLength,
  85                 g_aiccu->ipv6_interface);
  86
  87         if (g_aiccu->defaultroute)
  88         {
  89                 aiccu_exec(
  90                         "ip -6 ro add %s via %s dev %s",
  91                         "default",
  92                         hTunnel->sIPv6_POP,
  93                         g_aiccu->ipv6_interface);
  94         }
  95
  96         if (g_aiccu->setupscript)
  97         {
  98                 setenv("ACTION", "up", 1);
  99                 setenv("TUNNEL_TYPE", hTunnel->sType, 1);
 100                 setenv("INTERFACE", g_aiccu->ipv6_interface, 1);
 101                 setenv("REMOTE_ADDRESS", hTunnel->sIPv6_POP, 1);
 102
 103                 snprintf(buffer, sizeof(buffer), "%s/%u",
 104                         hTunnel->sIPv6_Local, hTunnel->nIPv6_PrefixLength);
 105                 setenv("LOCAL_ADDRESS", buffer, 1);
 106                 setenv("LINK_LOCAL_ADDRESS", hTunnel->sIPv6_LinkLocal, 1);
 107
 108                 snprintf(buffer, sizeof(buffer), "%u", hTunnel->nMTU);
 109                 setenv("MTU", buffer, 1);
 110
 111                 aiccu_exec("%s", g_aiccu->setupscript);
 112         }
 113
 114         return true;
 115 }
 116
 117 void aiccu_os_reconfig(struct TIC_Tunnel *hTunnel)
 118 {
 119         if (hTunnel->uses_tundev == 0)
 120         {
 121                 aiccu_exec(
 122                         "ip tunnel change %s local %s",
 123                         g_aiccu->ipv6_interface,
 124                         hTunnel->sIPv4_Local);
 125         }
 126 }
 127
 128 void aiccu_os_delete(struct TIC_Tunnel *hTunnel)
 129 {
 130         hTunnel = hTunnel;
 131         aiccu_exec(
 132                 "ip link set %s down",
 133                 g_aiccu->ipv6_interface);
 134
 135         if (hTunnel->uses_tundev == 0)
 136         {
 137                 aiccu_exec(
 138                         "ip tunnel del %s",
 139                         g_aiccu->ipv6_interface);
 140         }
 141
 142         {
 143                 setenv("ACTION", "down", 1);
 144                 setenv("INTERFACE", g_aiccu->ipv6_interface, 1);
 145
 146                 aiccu_exec("%s", g_aiccu->setupscript);
 147         }
 148 }
 149