正则表达式 DNS ANSWER SECTION 分组

Question

我一直在尝试对未绑定日志中 ANSWERS SECTION 的字段进行正则表达式。

此正则表达式仅提取 ANSWERS 部分中的最后一个条目：

(?:ANSWER\sSECTION:\s(?:(?<answer_name>\S+)#011(?<answer_ttl>\S+)#011(?<answer_class>\S+)#011(?<answer_type>\S+)#011(?<answer_rdata>\S+)\s)+\s\;\;)

此条目提取了“答案”部分中的所有内容，但也泄漏到“权威”部分

(?:(?<answer_name>\S+)#011(?<answer_ttl>\S+)#011(?<answer_class>\S+)#011(?<answer_type>\S+)#011(?<answer_rdata>\S+)\s)

我的目标是将每个答案都放在一个组中。关于如何在仍然捕获重复组的同时将组限制在“答案”部分的任何想法？

日志：

 2019-01-02T17:34:19-05:00 10.10.30.1 unbound: [48511:0] info: incoming scrubbed packet: ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0 ;; flags: qr rd ra ; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0  ;; QUESTION SECTION: gs-loc.ls-apple.com.akadns.net.#011IN#011A  ;; ANSWER SECTION: gs-loc.ls-apple.com.akadns.net.#01135#011IN#011A#01117.142.171.4 gs-loc.ls-apple.com.akadns.net.#01135#011IN#011A#01117.142.171.8 gs-loc.ls-apple.com.akadns.net.#01135#011IN#011A#01117.142.171.9  ;; AUTHORITY SECTION:  ;; ADDITIONAL SECTION: ;; MSG SIZE  rcvd: 96

 2019-01-02T17:34:42-05:00 10.10.30.1 unbound: [48511:0] info: cname msg ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0 ;; flags: qr rd ra ; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0  ;; QUESTION SECTION: init-p01md.apple.com.#011IN#011A  ;; ANSWER SECTION: init-p01md.apple.com.#0119665#011IN#011CNAME#011init-p01md-lb.push-apple.com.akadns.net.  ;; AUTHORITY SECTION:  ;; ADDITIONAL SECTION: ;; MSG SIZE  rcvd: 91

 2019-01-02T18:52:01-05:00 10.10.30.1 unbound: [48511:0] info: msg from cache lookup ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0 ;; flags: qr rd ra ; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 0  ;; QUESTION SECTION: amazonaws.com.#011IN#011DS  ;; ANSWER SECTION:  ;; AUTHORITY SECTION: xxxxxxxxxxxxxxxxxx.#01181254#011IN#011NSEC3#0111 1 0 - xxxxxxxxxxxxxxxxxxNS SOA RRSIG DNSKEY NSEC3PARAM ;{flags: optout} xxxxxxxxxxxxxxxxxx.com.#01181254#011IN#011RRSIG#011NSEC3 8 2 86400 20190107054258 20181231043258 37490 com. xxxxxxxxxxxxxxxxxx/2/xxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxx= ;{id = 37490} com.#011884#011IN#011SOA#011a.gtld-servers.net. nstld.verisign-grs.com. 1546473084 1800 900 604800 86400 com.#011884#011IN#011RRSIG#011SOA 8 1 900 20190109235124 20190102224124 37490 com. xxxxxxxxxxxxxxxxxx+xxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxx

Answer 1

您可以使用

(?:\G(?!\A)\s*|ANSWER\sSECTION:)\s*(?<answer_name>\S+)#011(?<answer_ttl>\d+)#011(?<answer_class>\w+)#011(?<answer_type>\w+)#011(?<answer_rdata>\S+)

见regex demo

详情

(?:\G(?!\A)\s*|ANSWER\sSECTION:) - ANSWER SECTION: 子字符串或上一个匹配项的结尾和 0+ 个空格
\s* - 0+ 个空格
(?<answer_name>\S+) - 组 "answer_name"：1 个或多个非空白字符
#011 - 文字子串
(?<answer_ttl>\d+) - 组 "answer_ttl"：1 个或多个数字
#011 - 文字子串
(?<answer_class>\w+) - 组 "answer_class"：1 个或多个单词字符
#011 - 文字子串
(?<answer_type>\w+) - 组 "answer_type"：1 个或多个单词字符
#011 - 文字子串
(?<answer_rdata>\S+) - 组 "answer_rdata"：1 个或多个非空白字符。

正则表达式 DNS ANSWER SECTION 分组

Regex DNS ANSWER SECTION into groups

regex

dns

unbound