{"id":1931,"date":"2020-12-30T16:12:11","date_gmt":"2020-12-30T08:12:11","guid":{"rendered":"https:\/\/www.yusian.com\/blog\/?p=1931"},"modified":"2020-12-30T16:12:11","modified_gmt":"2020-12-30T08:12:11","slug":"tcp%e4%b8%89%e6%ac%a1%e6%8f%a1%e6%89%8b%e4%b8%8e%e5%9b%9b%e6%ac%a1%e6%8c%a5%e6%89%8b","status":"publish","type":"post","link":"https:\/\/www.yusian.com\/blog\/java\/2020\/12\/30\/1612111931.html","title":{"rendered":"TCP\u4e09\u6b21\u63e1\u624b\u4e0e\u56db\u6b21\u6325\u624b"},"content":{"rendered":"

\u8bf4\u660e<\/h3>\n
    \n
  1. TCP\u5728\u5efa\u7acb\u8fde\u63a5\u4e0e\u65ad\u5f00\u8fde\u63a5\u65f6\u62a5\u6587\u5934\u90e8\u7684\u6807\u5fd7\u4f4d\u4e0e\u5e8f\u53f7\u503c\u5206\u522b\u662f\u591a\u5c11\u5462\uff1f<\/li>\n
  2. \u5229\u7528Java\u7684Socket\u5bf9\u8c61\u5206\u522b\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\uff0c\u5bf9\u8fdb\u901a\u8baf\u8fc7\u7a0b\u8fdb\u884c\u6570\u636e\u62a5\u6587\u6355\u83b7\uff1b<\/li>\n
  3. \u5206\u522b\u7814\u7a76\u4e24\u79cd\u60c5\u51b5\uff0c\u4e00\u79cd\u662f\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u90fd\u5728\u672c\u673a\uff0c\u53e6\u4e00\u79cd\u662f\u5206\u522b\u4f4d\u4e8e\u4e24\u53f0\u673a\u5668\u4e0a\uff1b<\/li>\n<\/ol>\n

    Java\u793a\u4f8b\u4ee3\u7801<\/h3>\n

    Client<\/p>\n

    \/\/ package com.yusian;\n\nimport java.io.*;\nimport java.net.Socket;\nimport java.util.Scanner;\n\npublic class Client {\n    public static void main(String[] args) {\n        try (\n                Socket socket = new Socket(\"127.0.0.1\", 8080);\n                OutputStream os = socket.getOutputStream();\n                OutputStreamWriter writer = new OutputStreamWriter(os);\n                InputStream is = socket.getInputStream();\n                InputStreamReader reader = new InputStreamReader(is);\n                BufferedReader br = new BufferedReader(reader);\n        ){\n            \/\/ \u7ec8\u7aef\u8f93\u5165\u5bf9\u8c61\n            Scanner sc = new Scanner(System.in);\n            System.out.print(\"\u8bf7\u8f93\u5165\uff1a\");\n\n            \/\/ \u8f93\u5165\u6d88\u606f\u5185\u5bb9\uff0c\u5199\u5165\u5230\u8f93\u5165\u6d41\n            String str = sc.nextLine();\n            writer.write(str);\n            writer.flush();\n            socket.shutdownOutput();\n\n            \/\/ \u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u9001\u8fc7\u6765\u7684\u6d88\u606f\n            String message = br.readLine();\n            System.out.println(message);\n\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n
    Server<\/p>\n
    \/\/ package com.yusian;\n\nimport java.io.*;\nimport java.net.ServerSocket;\nimport java.net.Socket;\n\npublic class Server {\n    public static void main(String[] args) {\n        try (\n                ServerSocket ss = new ServerSocket(8080);\n                Socket socket = ss.accept();\n                InputStream is = socket.getInputStream();\n                InputStreamReader reader = new InputStreamReader(is);\n                BufferedReader br = new BufferedReader(reader);\n                OutputStream os = socket.getOutputStream();\n                OutputStreamWriter writer = new OutputStreamWriter(os);\n        ) {\n            \/\/ \u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u9001\u8fc7\u6765\u7684\u6570\u636e\n            String s = br.readLine();\n            System.out.println(s);\n\n            \/\/ \u56de\u5199\u7ed9\u5ba2\u6237\u7aef\u4fe1\u606f\n            writer.write(\"ok\");\n            writer.flush();\n            socket.shutdownOutput();\n\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n
    Wireshark\u6293\u5305\u7ed3\u679c\u5206\u6790\uff1a<\/h3>\n
    \n  127.0.0.1 —> 127.0.0.1\n<\/p><\/blockquote>\n
      \n
    • [SYN] seq = 0, ack = 0<\/code>\n
        \n
      • [SYN, ACK] seq = 0, ack = 1<\/code><\/li>\n<\/ul>\n<\/li>\n
      • [ACK] seq = 1, ack = 1<\/code><\/li>\n
      • [PSH, ACK] seq = 1, ack = 1, len = 5<\/code>\n
          \n
        • [ACK] seq = 1, ack = 6<\/code><\/li>\n<\/ul>\n<\/li>\n
        • [FIN, ACK] seq = 6, ack = 1<\/code>\n
            \n
          • [ACK] seq = 1, ack = 7<\/code><\/li>\n
          • [PSH, ACK] seq = 1, ack = 7, len = 2<\/code><\/li>\n<\/ul>\n<\/li>\n
          • [ACK] seq = 7, ack = 3<\/code>\n
              \n
            • [FIN, ACK] seq = 3, ack = 7<\/code><\/li>\n<\/ul>\n<\/li>\n
            • [ACK] seq = 7, ack = 4<\/code><\/li>\n<\/ul>\n
              \n  localhost —> node.yusian.net\n<\/p><\/blockquote>\n
                \n
              • [SYN] seq = 0, ack = 0<\/code>\n
                  \n
                • [SYN, ACK] seq = 0, ack = 1<\/code><\/li>\n<\/ul>\n<\/li>\n
                • [ACK] seq = 1, ack = 1<\/code><\/li>\n
                • [PSH, ACK] seq = 1, ack = 1, len = 5<\/code><\/li>\n
                • [FIN, ACK] seq = 6, ack = 1<\/code>\n
                    \n
                  • [ACK] seq = 1, ack = 6 \/\/ \u8fd9\u91cc\u7684ack\u6211\u89c9\u5f97\u6309\u7406\u5e94\u8be5\u662f7\uff0c\u53ef\u5b9e\u9645\u4e0a\u662f6\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a\u591a\u4e2a\u62a5\u6587\u540c\u65f6\u5230\u8fbe\uff0c\u8fd9\u91ccack\u56de\u590d\u7684\u662fPSH\u6807\u8bb0\u7684\u62a5\u6587\uff0c\u800c\u975eFIN\u6807\u8bb0\u7684\u62a5\u6587<\/code><\/li>\n
                  • [PSH, ACK] seq = 1, ack = 7, len = 2<\/code><\/li>\n
                  • [FIN, ACK] seq = 3, ack = 7<\/code><\/li>\n<\/ul>\n<\/li>\n
                  • [ACK] seq = 7, ack = 4<\/code><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
                    \u8bf4\u660e TCP\u5728\u5efa\u7acb\u8fde\u63a5\u4e0e\u65ad\u5f00\u8fde\u63a5\u65f6\u62a5\u6587\u5934\u90e8\u7684\u6807\u5fd7\u4f4d\u4e0e\u5e8f\u53f7\u503c\u5206\u522b\u662f\u591a\u5c11\u5462\uff1f \u5229\u7528Java\u7684Socket\u5bf9\u8c61\u5206\u522b\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\uff0c\u5bf9\u8fdb\u901a\u8baf\u8fc7\u7a0b\u8fdb\u884c\u6570\u636e\u62a5\u6587\u6355\u83b7\uff1b \u5206\u522b\u7814\u7a76\u4e24\u79cd\u60c5\u51b5\uff0c\u4e00\u79cd\u662f\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u90fd\u5728\u672c\u673a\uff0c\u53e6\u4e00\u79cd\u662f\u5206\u522b\u4f4d\u4e8e\u4e24\u53f0\u673a\u5668\u4e0a\uff1b Java\u793a\u4f8b\u4ee3\u7801 Client \/\/ package com.yusian; import java.io.*; import java.net.Socket; import java.util.Scanner; public class Client { public static void main(String[] args) { try ( Socket socket = new Socket(“127.0.0.1”, 8080); OutputStream os = socket.getOutputStream(); OutputStreamWriter writer = new OutputStreamWriter(os); InputStream is = socket.getInputStream(); InputStreamReader reader = new InputStreamReader(is); BufferedReader br = new […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[34,265,324],"class_list":["post-1931","post","type-post","status-publish","format-standard","hentry","category-java","tag-java","tag-socket","tag-tcp"],"_links":{"self":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/1931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/comments?post=1931"}],"version-history":[{"count":0,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/1931\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/media?parent=1931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/categories?post=1931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/tags?post=1931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}