mirror of
https://github.com/pi-hole/pi-hole
synced 2024-12-22 06:48:07 +00:00
Reduce code duplications and add check via IPv6 without hard-coded nameserver
Signed-off-by: Christian König <github@yubiuser.dev>
This commit is contained in:
Christian König
parent
50dcd8d62f
commit
ce5ef79a3a
@ -167,88 +167,108 @@ is_command() {
|
||||
command -v "${check_command}" >/dev/null 2>&1
|
||||
}
|
||||
|
||||
os_check_dig(){
|
||||
local protocol="$1"
|
||||
local domain="$2"
|
||||
local nameserver="$3"
|
||||
local response
|
||||
|
||||
response="$(dig "${protocol}" +short -t txt "${domain}" "${nameserver}" 2>&1
|
||||
echo $?
|
||||
)"
|
||||
echo "${response}"
|
||||
}
|
||||
|
||||
os_check_dig_response(){
|
||||
# Checks the reply from the dig command to determine if it's a valid response
|
||||
local digReply="$1"
|
||||
local response
|
||||
|
||||
# Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
|
||||
response="${digReply%%$'\n'*}"
|
||||
# If the value of ${response} is a single 0, then this is the return code, not an actual response.
|
||||
if [ "${response}" == 0 ]; then
|
||||
echo false
|
||||
else
|
||||
echo true
|
||||
fi
|
||||
}
|
||||
|
||||
os_check() {
|
||||
if [ "$PIHOLE_SKIP_OS_CHECK" != true ]; then
|
||||
# This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
|
||||
# and determines whether or not the script is running on one of those systems
|
||||
local remote_os_domain valid_os valid_version valid_response detected_os detected_version display_warning cmdResult digReturnCode response
|
||||
local piholeNameserver="@ns1.pi-hole.net"
|
||||
remote_os_domain=${OS_CHECK_DOMAIN_NAME:-"versions.pi-hole.net"}
|
||||
|
||||
detected_os=$(grep '^ID=' /etc/os-release | cut -d '=' -f2 | tr -d '"')
|
||||
detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
|
||||
|
||||
# Test via IPv4 and hardcoded nameserver ns1.pi-hole.net
|
||||
cmdResult="$(
|
||||
dig -4 +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1
|
||||
echo $?
|
||||
)"
|
||||
cmdResult=$(os_check_dig 4 "${remote_os_domain}" "${piholeNameserver}")
|
||||
|
||||
# Gets the return code of the previous command (last line)
|
||||
digReturnCode="${cmdResult##*$'\n'}"
|
||||
|
||||
if [ ! "${digReturnCode}" == "0" ]; then
|
||||
valid_response=false
|
||||
else
|
||||
# Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
|
||||
response="${cmdResult%%$'\n'*}"
|
||||
# If the value of ${response} is a single 0, then this is the return code, not an actual response.
|
||||
if [ "${response}" == 0 ]; then
|
||||
valid_response=false
|
||||
else
|
||||
valid_response=true
|
||||
fi
|
||||
valid_response=$(os_check_dig_response cmdResult)
|
||||
fi
|
||||
|
||||
# Try again via IPv6 and hardcoded nameserver ns1.pi-hole.net
|
||||
if [ "$valid_response" = false ]; then
|
||||
unset valid_response
|
||||
unset cmdResult
|
||||
unset digReturnCode
|
||||
|
||||
cmdResult="$(
|
||||
dig -6 +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1
|
||||
echo $?
|
||||
)"
|
||||
cmdResult=$(os_check_dig 6 "${remote_os_domain}" "${piholeNameserver}")
|
||||
# Gets the return code of the previous command (last line)
|
||||
digReturnCode="${cmdResult##*$'\n'}"
|
||||
|
||||
if [ ! "${digReturnCode}" == "0" ]; then
|
||||
valid_response=false
|
||||
else
|
||||
# Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
|
||||
response="${cmdResult%%$'\n'*}"
|
||||
# If the value of ${response} is a single 0, then this is the return code, not an actual response.
|
||||
if [ "${response}" == 0 ]; then
|
||||
valid_response=false
|
||||
else
|
||||
valid_response=true
|
||||
fi
|
||||
valid_response=$(os_check_dig_response cmdResult)
|
||||
fi
|
||||
fi
|
||||
|
||||
# Try again without hardcoded nameserver
|
||||
if [ "$valid_response" = false ]; then
|
||||
unset valid_response
|
||||
unset cmdResult
|
||||
unset digReturnCode
|
||||
|
||||
cmdResult="$(
|
||||
dig +short -t txt "${remote_os_domain}" 2>&1
|
||||
echo $?
|
||||
)"
|
||||
cmdResult=$(os_check_dig 4 "${remote_os_domain}")
|
||||
# Gets the return code of the previous command (last line)
|
||||
digReturnCode="${cmdResult##*$'\n'}"
|
||||
|
||||
if [ ! "${digReturnCode}" == "0" ]; then
|
||||
valid_response=false
|
||||
else
|
||||
# Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
|
||||
response="${cmdResult%%$'\n'*}"
|
||||
# If the value of ${response} is a single 0, then this is the return code, not an actual response.
|
||||
if [ "${response}" == 0 ]; then
|
||||
valid_response=false
|
||||
else
|
||||
valid_response=true
|
||||
fi
|
||||
valid_response=$(os_check_dig_response cmdResult)
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ "$valid_response" = false ]; then
|
||||
unset valid_response
|
||||
unset cmdResult
|
||||
unset digReturnCode
|
||||
|
||||
cmdResult=$(os_check_dig 6 "${remote_os_domain}")
|
||||
# Gets the return code of the previous command (last line)
|
||||
digReturnCode="${cmdResult##*$'\n'}"
|
||||
|
||||
if [ ! "${digReturnCode}" == "0" ]; then
|
||||
valid_response=false
|
||||
else
|
||||
valid_response=$(os_check_dig_response cmdResult)
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ "$valid_response" = true ]; then
|
||||
response="${cmdResult%%$'\n'*}"
|
||||
IFS=" " read -r -a supportedOS < <(echo "${response}" | tr -d '"')
|
||||
for distro_and_versions in "${supportedOS[@]}"; do
|
||||
distro_part="${distro_and_versions%%=*}"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user