Remove checkedns

ReadMe.md

@@ -3,7 +3,7 @@
 **[English](ReadMe_en.md)**
 
 ![SmartDNS](doc/smartdns-banner.png)  
-SmartDNS是一个运行在本地的DNS服务器，SmartDNS接受本地客户端的DNS查询请求，从多个上游DNS服务器获取DNS查询结果，并将访问速度最快的结果返回给客户端，避免DNS污染，提高网络访问速度。
+SmartDNS是一个运行在本地的DNS服务器，SmartDNS接受本地客户端的DNS查询请求，从多个上游DNS服务器获取DNS查询结果，并将访问速度最快的结果返回给客户端，提高网络访问速度。
 同时支持指定特定域名IP地址，并高性匹配，达到过滤广告的效果。  
 与dnsmasq的all-servers不同，smartdns返回的是访问速度最快的解析结果。 (详细差异请看[FAQ](#faq)) 
 
@@ -93,10 +93,10 @@ rtt min/avg/max/mdev = 5.954/6.133/6.313/0.195 ms
    支持配置多个上游DNS服务器，并同时进行查询，即使其中有DNS服务器异常，也不会影响查询。  
 
 1. **返回最快IP地址**  
-   支持从域名所属IP地址列表中查找到访问速度最快的IP地址，并返回给客户端，避免DNS污染，提高网络访问速度。
+   支持从域名所属IP地址列表中查找到访问速度最快的IP地址，并返回给客户端，提高网络访问速度。
 
 1. **支持多种查询协议**  
-   支持UDP，TCP，TLS, HTTPS查询，以及非53端口查询，有效避免DNS污染。
+   支持UDP，TCP，TLS, HTTPS查询，以及非53端口查询。
 
 1. **特定域名IP地址指定**  
    支持指定域名的IP地址，达到广告过滤效果，避免恶意网站的效果。
@@ -560,7 +560,7 @@ https://github.com/pymumu/smartdns/releases
 |audit-size|审计大小|128K|数字+K,M,G|audit-size 128K
 |audit-num|审计归档个数|2|数字|audit-num 2
 |conf-file|附加配置文件|无|文件路径|conf-file /etc/smartdns/smartdns.more.conf
-|server|上游UDP DNS|无|可重复<br>`[ip][:port]`：服务器IP，端口可选。<br>`[-blacklist-ip]`：blacklist-ip参数指定使用blacklist-ip配置IP过滤结果。<br>`[-check-edns]`：edns过滤。<br>`[-group [group] ...]`：DNS服务器所属组，比如office, foreign，和nameserver配套使用。<br>`[-exclude-default-group]`：将DNS服务器从默认组中排除| server 8.8.8.8:53 -blacklist-ip -check-edns -group g1
+|server|上游UDP DNS|无|可重复<br>`[ip][:port]`：服务器IP，端口可选。<br>`[-blacklist-ip]`：blacklist-ip参数指定使用blacklist-ip配置IP过滤结果。<br>`[-group [group] ...]`：DNS服务器所属组，比如office, foreign，和nameserver配套使用。<br>`[-exclude-default-group]`：将DNS服务器从默认组中排除| server 8.8.8.8:53 -blacklist-ip -group g1
 |server-tcp|上游TCP DNS|无|可重复<br>`[ip][:port]`：服务器IP，端口可选。<br>`[-blacklist-ip]`：blacklist-ip参数指定使用blacklist-ip配置IP过滤结果。<br>`[-group [group] ...]`：DNS服务器所属组，比如office, foreign，和nameserver配套使用。<br>`[-exclude-default-group]`：将DNS服务器从默认组中排除| server-tcp 8.8.8.8:53
 |server-tls|上游TLS DNS|无|可重复<br>`[ip][:port]`：服务器IP，端口可选。<br>`[-spki-pin [sha256-pin]]`: TLS合法性校验SPKI值，base64编码的sha256 SPKI pin值<br>`[host-name]`：TLS SNI名称<br>`[-blacklist-ip]`：blacklist-ip参数指定使用blacklist-ip配置IP过滤结果。<br>`[-group [group] ...]`：DNS服务器所属组，比如office, foreign，和nameserver配套使用。<br>`[-exclude-default-group]`：将DNS服务器从默认组中排除| server-tls 8.8.8.8:853
 |server-https|上游HTTPS DNS|无|可重复<br>`https://[host][:port]/path`：服务器IP，端口可选。<br>`[-spki-pin [sha256-pin]]`: TLS合法性校验SPKI值，base64编码的sha256 SPKI pin值<br>`[host-name]`：TLS SNI名称<br>`[http-host]`：http协议头主机名<br>`[-blacklist-ip]`：blacklist-ip参数指定使用blacklist-ip配置IP过滤结果。<br>`[-group [group] ...]`：DNS服务器所属组，比如office, foreign，和nameserver配套使用。<br>`[-exclude-default-group]`：将DNS服务器从默认组中排除| server-https https://cloudflare-dns.com/dns-query
@@ -586,7 +586,6 @@ https://github.com/pymumu/smartdns/releases
     * 针对广告屏蔽功能做增强，返回SOA，屏蔽广告效果更佳；
     * IPV4，IPV6双栈IP优选机制，在双网情况下，选择最快的网络通讯。
     * 支持最新的TLS, HTTPS协议，提供安全的DNS查询能力。
-    * DNS防抢答机制，及多种机制避免DNS污染。
     * ECS支持，是查询结果更佳准确。
     * IP黑名单，忽略IP机制，使域名查询更佳准确。
     * 域名预查询，访问常用网站更加快速。
@@ -601,8 +600,6 @@ https://github.com/pymumu/smartdns/releases
     * 国内公共DNS，如`119.29.29.29`, `223.5.5.5`。
     * 国外公共DNS，如`8.8.8.8`, `8.8.4.4`。
 
-    对于特定的域名，如果有污染情况，可以启用防污染机制。
-
 1. 如何启用审计日志  
     审计日志记录客户端请求的域名，记录信息包括，请求时间，请求IP，请求域名，请求类型，如果要启用审计日志，在配置界面配置`audit-enable yes`启用，`audit-size`, `audit-file`, `audit-num`分别配置审计日志文件大小，审计日志文件路径，和审计日志文件个数。审计日志文件将会压缩存储以节省空间。
 

ReadMe_en.md

@@ -555,7 +555,7 @@ Note: Merlin firmware is derived from ASUS firmware and can theoretically be use
 |audit-size|audit log size|128K|number+K,M,G|audit-size 128K
 |audit-num|archived audit log number|2|Integer|audit-num 2
 |conf-file|additional conf file|None|File path|conf-file /etc/smartdns/smartdns.more.conf
-|server|Upstream UDP DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-check-edns]`: edns filter. <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server 8.8.8.8:53 -blacklist-ip -check-edns
+|server|Upstream UDP DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server 8.8.8.8:53 -blacklist-ip 
 |server-tcp|Upstream TCP DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server-tcp 8.8.8.8:53
 |server-tls|Upstream TLS DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-spki-pin [sha256-pin]]`: TLS verify SPKI value, a base64 encoded SHA256 hash<br>`[host-name]`:TLS Server name<br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server-tls 8.8.8.8:853
 |server-https|Upstream HTTPS DNS server|None|Repeatable <br>`https://[host][:port]/path`: Server IP, port optional. <br>`[-spki-pin [sha256-pin]]`: TLS verify SPKI value, a base64 encoded SHA256 hash<br>`[host-name]`:TLS Server name<br>`[http-host]`：http header host<br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server-https https://cloudflare-dns.com/dns-query

package/luci/files/luci/i18n/smartdns.zh-cn.po

@@ -11,7 +11,7 @@ msgid "SmartDNS Server"
 msgstr "SmartDNS 服务器"
 
 msgid "SmartDNS is a local high-performance DNS server, supports finding fastest IP, supports ad filtering, and supports avoiding DNS poisoning."
-msgstr "SmartDNS是一个本地高性能DNS服务器，支持避免域名污染，支持返回最快IP，支持广告过滤。"
+msgstr "SmartDNS是一个本地高性能DNS服务器，支持返回最快IP，支持广告过滤。"
 
 msgid "Custom Settings"
 msgstr "自定义设置"

package/luci/files/luci/model/cbi/smartdns/upstream.lua

@@ -70,13 +70,13 @@ o.cfgvalue    = function(...)
 end
 
 ---- anti-Answer-Forgery
-o = s:option(Flag, "check_edns", translate("Anti Answer Forgery"), translate("Anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"))
-o.rmempty     = false
-o.default     = o.disabled
-o:depends("type", "udp")
-o.cfgvalue    = function(...)
-    return Flag.cfgvalue(...) or "0"
-end
+-- o = s:option(Flag, "check_edns", translate("Anti Answer Forgery"), translate("Anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"))
+-- o.rmempty     = false
+-- o.default     = o.disabled
+-- o:depends("type", "udp")
+-- o.cfgvalue    = function(...)
+--     return Flag.cfgvalue(...) or "0"
+-- end
 
 ---- SPKI pin
 o = s:option(Value, "spki_pin", translate("TLS SPKI Pinning"), translate("Used to verify the validity of the TLS server, The value is Base64 encoded SPKI fingerprint, leaving blank to indicate that the validity of TLS is not verified."))

src/dns_conf.c

@@ -168,7 +168,10 @@ static int _config_server(int argc, char *argv[], dns_server_type_t type, int de
 	/* clang-format off */
 	static struct option long_options[] = {
 		{"blacklist-ip", no_argument, NULL, 'b'}, /* filtering with blacklist-ip */
+#ifdef FEATURE_CHECK_EDNS
+		/* experimental feature */
 		{"check-edns", no_argument, NULL, 'e'},   /* check edns */
+#endif
 		{"spki-pin", required_argument, NULL, 'p'}, /* check SPKI pin */
 		{"host-name", required_argument, NULL, 'h'}, /* host name */
 		{"http-host", required_argument, NULL, 'H'}, /* http host */