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Improve network interfaces

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- Try to auto detect server's default network interface
- Display a warning if the default interface is wlan*
This commit is contained in:
hwdsl2 2017-05-17 17:24:19 -05:00
parent d437f7044d
commit d711e2aee6
2 changed files with 48 additions and 16 deletions
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32
vpnsetup.sh
View File

@ -68,20 +68,36 @@ if [ "$(id -u)" != 0 ]; then
fi fi
NET_IFACE=${VPN_NET_IFACE:-'eth0'} NET_IFACE=${VPN_NET_IFACE:-'eth0'}
DEF_IFACE="$(route | grep '^default' | grep -o '[^ ]*$')"
if_state=$(cat "/sys/class/net/$NET_IFACE/operstate" 2>/dev/null) if_state1=$(cat "/sys/class/net/$DEF_IFACE/operstate" 2>/dev/null)
if [ -z "$if_state" ] || [ "$if_state" = "down" ] || [ "$NET_IFACE" = "lo" ]; then if [ -z "$VPN_NET_IFACE" ] && [ -n "$if_state1" ] && [ "$if_state1" != "down" ]; then
printf "Error: Network interface '%s' is not available.\n\n" "$NET_IFACE" >&2 case "$DEF_IFACE" in
cat 1>&2 <<'EOF' wlan*)
printf "Error: Default network interface '%s' detected.\n\n" "$DEF_IFACE" >&2
cat 1>&2 <<EOF
DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
If running on a server, please re-run the script using If you are certain that this script is running on a server,
the following commands: please re-run it using the following command:
VPN_NET_IFACE="$(route | grep '^default' | grep -o '[^ ]*$')" sudo VPN_NET_IFACE="$DEF_IFACE" sh "$0"
EOF EOF
exit 1
;;
esac
NET_IFACE="$DEF_IFACE"
fi
if_state2=$(cat "/sys/class/net/$NET_IFACE/operstate" 2>/dev/null)
if [ -z "$if_state2" ] || [ "$if_state2" = "down" ] || [ "$NET_IFACE" = "lo" ]; then
printf "Error: Network interface '%s' is not available.\n\n" "$NET_IFACE" >&2
if [ -z "$VPN_NET_IFACE" ]; then
cat 1>&2 <<EOF cat 1>&2 <<EOF
sudo VPN_NET_IFACE="\$VPN_NET_IFACE" sh "$0" This script is unable to detect your server's default network interface.
You may manually re-run it using the following command:
sudo VPN_NET_IFACE="YOUR_DEFAULT_NETWORK_INTERFACE" sh "$0"
EOF EOF
fi
exit 1 exit 1
fi fi

32
vpnsetup_centos.sh
View File

@ -61,20 +61,36 @@ if [ "$(id -u)" != 0 ]; then
fi fi
NET_IFACE=${VPN_NET_IFACE:-'eth0'} NET_IFACE=${VPN_NET_IFACE:-'eth0'}
DEF_IFACE="$(route | grep '^default' | grep -o '[^ ]*$')"
if_state=$(cat "/sys/class/net/$NET_IFACE/operstate" 2>/dev/null) if_state1=$(cat "/sys/class/net/$DEF_IFACE/operstate" 2>/dev/null)
if [ -z "$if_state" ] || [ "$if_state" = "down" ] || [ "$NET_IFACE" = "lo" ]; then if [ -z "$VPN_NET_IFACE" ] && [ -n "$if_state1" ] && [ "$if_state1" != "down" ]; then
printf "Error: Network interface '%s' is not available.\n\n" "$NET_IFACE" >&2 case "$DEF_IFACE" in
cat 1>&2 <<'EOF' wlan*)
printf "Error: Default network interface '%s' detected.\n\n" "$DEF_IFACE" >&2
cat 1>&2 <<EOF
DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
If running on a server, please re-run the script using If you are certain that this script is running on a server,
the following commands: please re-run it using the following command:
VPN_NET_IFACE="$(route | grep '^default' | grep -o '[^ ]*$')" sudo VPN_NET_IFACE="$DEF_IFACE" sh "$0"
EOF EOF
exit 1
;;
esac
NET_IFACE="$DEF_IFACE"
fi
if_state2=$(cat "/sys/class/net/$NET_IFACE/operstate" 2>/dev/null)
if [ -z "$if_state2" ] || [ "$if_state2" = "down" ] || [ "$NET_IFACE" = "lo" ]; then
printf "Error: Network interface '%s' is not available.\n\n" "$NET_IFACE" >&2
if [ -z "$VPN_NET_IFACE" ]; then
cat 1>&2 <<EOF cat 1>&2 <<EOF
sudo VPN_NET_IFACE="\$VPN_NET_IFACE" sh "$0" This script is unable to detect your server's default network interface.
You may manually re-run it using the following command:
sudo VPN_NET_IFACE="YOUR_DEFAULT_NETWORK_INTERFACE" sh "$0"
EOF EOF
fi
exit 1 exit 1
fi fi