forked from c-mueller/ads
/
setup_parse.go
160 lines (148 loc) · 4.6 KB
/
setup_parse.go
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// Copyright 2018 - 2019 Christian Müller <dev@c-mueller.xyz>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ads
import (
"github.com/coredns/coredns/plugin"
"github.com/mholt/caddy"
"net"
"strings"
"time"
)
type adsPluginConfig struct {
BlocklistURLs []string
BlacklistRules []string
WhitelistRules []string
RegexBlacklistRules []string
RegexWhitelistRules []string
TargetIP net.IP
TargetIPv6 net.IP
BlocklistRenewalInterval time.Duration
BlocklistRenewalRetryCount int
BlocklistRenewalRetryInterval time.Duration
BlocklistPersistencePath string
EnableLogging bool
EnableAutoUpdate bool
EnableBlocklistPersistence bool
}
func parsePluginConfiguration(c *caddy.Controller) (*adsPluginConfig, error) {
config := defaultConfigWithoutRules
for c.NextBlock() {
value := c.Val()
switch value {
case "default-lists":
config.BlocklistURLs = append(config.BlocklistURLs, defaultBlocklists...)
case "list":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No URL found after list token"))
}
url := c.Val()
if !strings.HasPrefix(url, "http") || !strings.Contains(url, "://") {
return nil, plugin.Error("ads", c.Err("Invalid url"))
}
config.BlocklistURLs = append(config.BlocklistURLs, url)
case "target":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No target IP specified"))
}
ip := net.ParseIP(c.Val())
if ip == nil {
return nil, plugin.Error("ads", c.Err("Invalid target IP specified"))
}
config.TargetIP = ip
case "target-ipv6":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No target IP specified"))
}
ip := net.ParseIP(c.Val())
if ip == nil {
return nil, plugin.Error("ads", c.Err("Invalid target IP specified"))
}
config.TargetIPv6 = ip
case "disable-auto-update":
config.EnableAutoUpdate = false
break
case "auto-update-interval":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No update interval defined"))
}
i, err := time.ParseDuration(c.Val())
if err != nil {
return nil, plugin.Error("ads", err)
}
config.BlocklistRenewalRetryInterval = i
break
//TODO Add Options for Failure Retry interval and Failure retry count
case "blocklist-file":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No filepath for blocklist persistency defined"))
}
if config.EnableBlocklistPersistence {
return nil, plugin.Error("ads", c.Err("Only one filepath for blocklist persistency can be defined"))
}
path := c.Val()
//TODO implement check if path is valid
config.EnableBlocklistPersistence = true
config.BlocklistPersistencePath = path
break
case "log":
config.EnableLogging = true
case "whitelist":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No name for whitelist entry defined"))
}
config.WhitelistRules = append(config.WhitelistRules, c.Val())
break
case "blacklist":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No name for blacklist entry defined"))
}
config.BlacklistRules = append(config.BlacklistRules, c.Val())
break
case "whitelist-regex":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No name for whitelist regex entry defined"))
}
config.RegexBlacklistRules = append(config.RegexWhitelistRules, c.Val())
break
case "blacklist-regex":
if !c.NextArg() {
return nil, plugin.Error("ads", c.Err("No name for blacklist regex entry defined"))
}
config.RegexBlacklistRules = append(config.RegexBlacklistRules, c.Val())
break
case "}":
break
case "{":
break
}
}
if len(config.BlocklistURLs) == 0 {
config.BlocklistURLs = defaultBlocklists
}
return &config, nil
}
func buildRulesetFromConfig(cfg *adsPluginConfig) (*RuleSet, error) {
ruleset := BuildRuleset(cfg.WhitelistRules, cfg.BlacklistRules)
for _, v := range cfg.RegexWhitelistRules {
if err := ruleset.AddRegexToWhitelist(v); err != nil {
return nil, err
}
}
for _, v := range cfg.RegexBlacklistRules {
if err := ruleset.AddRegexToBlacklist(v); err != nil {
return nil, err
}
}
return &ruleset, nil
}