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ddns-scripts: refactor verify_proxy()

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no calls to external utilities - use variable substitution.
no regex.

Signed-off-by: Paul Donald <newtwen+github@gmail.com>
This commit is contained in:
Paul Donald
2025-04-11 15:08:54 +02:00
committed by Florian Eckert
parent 38e02fbd57
commit 88dc8e8b88
1 changed files with 43 additions and 30 deletions
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73
net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_functions.sh
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@@ -598,7 +598,7 @@ verify_dns() {
return 0
}
# analyze and verify given proxy string
# analyse and verify given proxy string
# $1 Proxy-String to verify
verify_proxy() {
# complete entry user:password@host:port
@@ -606,49 +606,62 @@ verify_proxy() {
# host and port only host:port
# host only host ERROR unsupported
# IPv4 address instead of host 123.234.234.123
# IPv6 address instead of host [xxxx:....:xxxx] in square bracket
local __TMP __HOST __PORT
local __ERR=255 # last error buffer
local __CNT=0 # error counter
# IPv6 address instead of host [xxxx:....:xxxx] in square brackets
# local user password
local host port rest error_count err_code
err_code=255 # last error buffer
error_count=0 # error counter
[ $# -ne 1 ] && write_log 12 "Error calling 'verify_proxy()' - wrong number of parameters"
write_log 7 "Verify Proxy server 'http://$1'"
# try to split user:password "@" host:port
__TMP=$(echo $1 | awk -F "@" '{print $2}')
# no "@" found - only host:port is given
[ -z "$__TMP" ] && __TMP="$1"
# now lets check for IPv6 address
__HOST=$(echo $__TMP | grep -m 1 -o "$IPV6_REGEX")
# IPv6 host address found read port
if [ -n "$__HOST" ]; then
# IPv6 split at "]:"
__PORT=$(echo $__TMP | awk -F "]:" '{print $2}')
if [ "${1#*'@'}" != "$1" ]; then
# Format: user:password@host:port or user:password@[ipv6]:port
# user="${1%%:*}" # currently unused
# rest="${1#*:}"
# password="${rest%%@*}" # currently unused
# Extract the host:port part
rest="${rest#*@}"
else
__HOST=$(echo $__TMP | awk -F ":" '{print $1}')
__PORT=$(echo $__TMP | awk -F ":" '{print $2}')
# Format: host:port or [ipv6]:port
rest="$1"
fi
if [ "${rest#*'['}" != "$rest" ]; then
# Format: [ipv6]:port
host="${rest%%]*}"
host="${host#[}" # Remove the leading '['
port="${rest##*:}"
else
host="${rest%%:*}"
port="${rest#*:}"
fi
# No Port detected - EXITING
[ -z "$__PORT" ] && {
[ -z "$port" ] && {
[ -n "$LUCI_HELPER" ] && return 5
write_log 14 "Invalid Proxy server Error '5' - proxy port missing"
}
while [ $__ERR -gt 0 ]; do
verify_host_port "$__HOST" "$__PORT"
__ERR=$?
if [ -n "$LUCI_HELPER" ]; then # no retry if called by LuCI helper script
return $__ERR
elif [ $__ERR -gt 0 -a $VERBOSE -gt 1 ]; then # VERBOSE > 1 then NO retry
write_log 4 "Verify Proxy server '$1' failed - Verbose Mode: $VERBOSE - NO retry on error"
return $__ERR
elif [ $__ERR -gt 0 ]; then
__CNT=$(( $__CNT + 1 )) # increment error counter
while [ "$err_code" -gt 0 ]; do
verify_host_port "$host" "$port"
err_code=$?
[ -n "$LUCI_HELPER" ] && return "$err_code" # no retry if called by LuCI helper script
if [ "$err_code" -gt 0 ]; then
[ "$VERBOSE" -gt 1 ] && {
write_log 4 "Verify Proxy server '$1' failed - Verbose Mode: $VERBOSE - NO retry on error"
return "$err_code"
}
error_count=$(( error_count + 1 ))
# if error count > retry_max_count leave here
[ $retry_max_count -gt 0 -a $__CNT -gt $retry_max_count ] && \
[ "$retry_max_count" -gt 0 ] && [ $error_count -gt "$retry_max_count" ] && \
write_log 14 "Verify Proxy server '$1' failed after $retry_max_count retries"
write_log 4 "Verify Proxy server '$1' failed - retry $__CNT/$retry_max_count in $RETRY_SECONDS seconds"
write_log 4 "Verify Proxy server '$1' failed - retry $error_count/$retry_max_count in $RETRY_SECONDS seconds"
sleep $RETRY_SECONDS &
PID_SLEEP=$!
wait $PID_SLEEP # enable trap-handler