TCP \u4e2d\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef<\/strong><\/h2>\n

\u4ec0\u4e48\u662f\u5ba2\u6237\u7aef\uff1f<\/h3>\n

\u6bcf\u5f53\u4f60\u60f3\u8981\u8fde\u63a5\u5230\u7f51\u7edc\u4e0a\u7684\u67d0\u4e2a\u670d\u52a1\u6216\u8d44\u6e90\u65f6\uff0c\u4f60\u5c31\u5728\u4e0e\u5ba2\u6237\u7aef\u6253\u4ea4\u9053\u3002\u5ba2\u6237\u7aef\u5728 TCP \u901a\u4fe1\u4e2d\u626e\u6f14\u53d1\u8d77\u65b9\u7684\u89d2\u8272\u3002\u4f60\u4f7f\u7528\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\uff0c\u5e76\u671f\u671b\u83b7\u5f97\u6570\u636e\u6216\u670d\u52a1\u4f5c\u4e3a\u56de\u5e94\u3002\u5ba2\u6237\u7aef\u5728\u542f\u52a8\u8fde\u63a5\u8fc7\u7a0b\u4ee5\u53ca\u7ba1\u7406\u4f60\u7684\u8bbe\u5907\u5982\u4f55\u901a\u8fc7 TCP \u7b49\u534f\u8bae\u4e0e\u5176\u4ed6\u8bbe\u5907\u901a\u4fe1\u65b9\u9762\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002<\/p>\n

\u5728 TCP \u901a\u4fe1\u4e2d\uff0c\u4f60\u5728\u5ba2\u6237\u7aef\u4fa7\u901a\u5e38\u4f1a\u6267\u884c\u4ee5\u4e0b\u4e3b\u8981\u529f\u80fd\uff1a<\/p>\n

\n
• \u901a\u8fc7\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u6765\u53d1\u8d77\u901a\u4fe1\u3002<\/li>\n
• \u4f7f\u7528\u5957\u63a5\u5b57\u5efa\u7acb\u8fde\u63a5\uff0c\u8fd9\u662f TCP \u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u4e00\u6b65\u3002<\/li>\n
• \u5728\u53d1\u9001\u8bf7\u6c42\u540e\u7b49\u5f85\u670d\u52a1\u5668\u7684\u54cd\u5e94\u3002<\/li>\n<\/ul>\n

  \u5f53\u4f60\u542f\u52a8\u4e00\u4e2a TCP \u8fde\u63a5\u65f6\uff0c\u4f1a\u9075\u5faa\u4e00\u4e2a\u7279\u5b9a\u7684\u8fc7\u7a0b\u3002\u5ba2\u6237\u7aef\u9996\u5148\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a SYN \u5305\u4ee5\u5f00\u59cb\u63e1\u624b\uff1b\u670d\u52a1\u5668\u7528\u4e00\u4e2a SYN-ACK \u5305\u8fdb\u884c\u54cd\u5e94\uff1b\u968f\u540e\u4f60\u518d\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a ACK \u5305\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u786e\u4fdd\u4f60\u7684\u8bbe\u5907\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u5efa\u7acb\u8d77\u4e00\u4e2a\u53ef\u9760\u7684\u8fde\u63a5\u3002<\/p>\n

  \n\n\n\n<\/colgroup>\n\n\n\n\n\n

  \u6b65\u9aa4<\/th>\n	\u8bf4\u660e<\/th>\n<\/tr>\n
  1<\/td>\n	\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001 SYN \u5305\u3002<\/td>\n<\/tr>\n
  2<\/td>\n	\u670d\u52a1\u5668\u7528 SYN-ACK \u5305\u8fdb\u884c\u54cd\u5e94\u3002<\/td>\n<\/tr>\n
  3<\/td>\n	\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u518d\u6b21\u53d1\u9001 ACK \u5305\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u4f60\u7ecf\u5e38\u4f1a\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\u6765\u521b\u5efa\u4e00\u4e2a TCP \u5ba2\u6237\u7aef\u8fde\u63a5\uff1a<\/p>\n \n Socket s;\r\ntry {\r\n s = new Socket(dest, destport);\r\n}\r\ncatch(IOException ioe) {\r\n System.err.println(\"cannot connect to <\" + desthost + \",\" + destport + \">\");\r\n return;\r\n}\r\n<\/code><\/pre>\n<\/blockquote>\n \u8fd9\u6bb5\u4ee3\u7801\u5c55\u793a\u4e86\u4f60\u5982\u4f55\u5728\u771f\u5b9e\u5e94\u7528\u4e2d\u5229\u7528 TCP \u5957\u63a5\u5b57\u8fde\u63a5\u5230\u670d\u52a1\u5668\u3002<\/p>\n \u4ec0\u4e48\u662f\u670d\u52a1\u5668\u7aef\uff1f<\/h3>\n \u670d\u52a1\u5668\u7aef\u5728\u7f51\u7edc\u4e0a\u7b49\u5f85\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u4f20\u5165\u8fde\u63a5\u3002\u4f60\u4f1a\u642d\u5efa\u4e00\u4e2a\u670d\u52a1\u5668\uff0c\u8ba9\u5b83\u4f7f\u7528 TCP \u534f\u8bae\u76d1\u542c\u8bf7\u6c42\u5e76\u8fdb\u884c\u54cd\u5e94\u3002\u670d\u52a1\u5668\u7aef\u8d1f\u8d23\u7ba1\u7406\u591a\u4e2a\u8fde\u63a5\uff0c\u5e76\u786e\u4fdd\u6bcf\u4e2a\u5ba2\u6237\u7aef\u90fd\u80fd\u83b7\u5f97\u6b63\u786e\u7684\u54cd\u5e94\u3002<\/p>\n \u5728\u642d\u5efa\u4e00\u4e2a TCP \u670d\u52a1\u5668\u65f6\uff0c\u4f60\u901a\u5e38\u4f1a\u9075\u5faa\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n \u6b65\u9aa4<\/th>\n \u8bf4\u660e<\/th>\n<\/tr>\n 1<\/td>\n \u4f7f\u7528 socket() \u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u3002<\/td>\n<\/tr>\n 2<\/td>\n \u4f7f\u7528 bind() \u51fd\u6570\u5c06\u5957\u63a5\u5b57\u7ed1\u5b9a\u5230\u67d0\u4e2a\u5730\u5740\u3002<\/td>\n<\/tr>\n 3<\/td>\n \u4f7f\u7528 listen() \u51fd\u6570\u76d1\u542c\u8fde\u63a5\u3002<\/td>\n<\/tr>\n 4<\/td>\n \u4f7f\u7528 accept() \u7cfb\u7edf\u8c03\u7528\u63a5\u53d7\u8fde\u63a5\u3002\u8be5\u8c03\u7528\u901a\u5e38\u4f1a\u963b\u585e\uff0c\u76f4\u5230\u6709\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002<\/td>\n<\/tr>\n 5<\/td>\n \u901a\u8fc7 send() \u548c receive() \u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002<\/td>\n<\/tr>\n 6<\/td>\n \u901a\u8fc7 close() \u51fd\u6570\u5173\u95ed\u8fde\u63a5\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4f60\u4f1a\u770b\u5230\u670d\u52a1\u5668\u7aef\u4ee5\u5982\u4e0b\u65b9\u5f0f\u5904\u7406\u4f20\u5165\u7684 TCP \u8fde\u63a5\u8bf7\u6c42\uff1a<\/p>\n \n \u670d\u52a1\u5668\u59cb\u7ec8\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u4f20\u5165\u8fde\u63a5\u3002<\/li>\n \u4e00\u65e6\u5ba2\u6237\u7aef\u8fde\u63a5\u6210\u529f\uff0c\u670d\u52a1\u5668\u5c31\u63a5\u53d7\u8be5\u8fde\u63a5\u5e76\u4e3a\u8be5\u5ba2\u6237\u7aef\u521b\u5efa\u4e00\u4e2a\u4e13\u7528\u5957\u63a5\u5b57\u3002<\/li>\n \u670d\u52a1\u5668\u53ef\u4ee5\u901a\u8fc7\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u521b\u5efa\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u6216\u65b0\u4efb\u52a1\u6765\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u3002<\/li>\n \u6570\u636e\u901a\u8fc7\u5ba2\u6237\u7aef\u7684\u4e13\u7528\u5957\u63a5\u5b57\u8fdb\u884c\u6536\u53d1\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u901a\u4fe1\u3002<\/li>\n \u4ea4\u4e92\u5b8c\u6210\u540e\uff0c\u670d\u52a1\u5668\u4f1a\u6b63\u786e\u5173\u95ed\u5ba2\u6237\u7aef\u7684\u5957\u63a5\u5b57\u4ee5\u91ca\u653e\u8d44\u6e90\u3002<\/li>\n<\/ul>\n \u4f60\u4f9d\u8d56\u670d\u52a1\u5668\u7aef\u6765\u4e3a\u7f51\u7edc\u901a\u4fe1\u63d0\u4f9b\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u670d\u52a1\u5668\u5fc5\u987b\u4e25\u683c\u9075\u5b88 TCP \u534f\u8bae\uff0c\u624d\u80fd\u4fdd\u8bc1\u6bcf\u4e2a\u5ba2\u6237\u7aef\u90fd\u80fd\u63a5\u6536\u51c6\u786e\u7684\u6570\u636e\u3002<\/p>\n \u5173\u952e\u533a\u522b<\/h3>\n \u4f60\u9700\u8981\u7406\u89e3 TCP \u901a\u4fe1\u4e2d\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u4e4b\u95f4\u7684\u5dee\u5f02\u3002\u8fd9\u4e9b\u5dee\u5f02\u80fd\u5e2e\u52a9\u4f60\u8bbe\u8ba1\u66f4\u597d\u7684\u7f51\u7edc\u5e94\u7528\u5e76\u6392\u67e5\u95ee\u9898\u3002<\/p>\n \n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n \u7ef4\u5ea6<\/th>\n \u5ba2\u6237\u7aef<\/th>\n \u670d\u52a1\u5668\u7aef<\/th>\n<\/tr>\n \u89d2\u8272<\/td>\n \u53d1\u8d77\u8fde\u63a5<\/td>\n \u7b49\u5f85\u5e76\u63a5\u53d7\u8fde\u63a5<\/td>\n<\/tr>\n \u4e3b\u8981\u52a8\u4f5c<\/td>\n \u53d1\u9001\u8bf7\u6c42<\/td>\n \u76d1\u542c\u5e76\u54cd\u5e94\u8bf7\u6c42<\/td>\n<\/tr>\n \u5957\u63a5\u5b57\u4f7f\u7528<\/td>\n \u521b\u5efa\u5957\u63a5\u5b57\u4ee5\u8fde\u63a5\u670d\u52a1\u5668<\/td>\n \u521b\u5efa\u5957\u63a5\u5b57\u4ee5\u76d1\u542c\u5ba2\u6237\u7aef<\/td>\n<\/tr>\n \u8fde\u63a5<\/td>\n \u53d1\u8d77 TCP \u63e1\u624b<\/td>\n \u54cd\u5e94\u63e1\u624b\u5e76\u7ba1\u7406\u8fde\u63a5<\/td>\n<\/tr>\n \u534f\u8bae\u4f7f\u7528<\/td>\n \u9075\u5faa TCP \u534f\u8bae\u53d1\u8d77\u6570\u636e\u8bf7\u6c42<\/td>\n \u9075\u5faa TCP \u534f\u8bae\u63d0\u4f9b\u6570\u636e<\/td>\n<\/tr>\n \u7f51\u7edc\u4fa7\u91cd<\/td>\n \u8bf7\u6c42\u8d44\u6e90\u6216\u670d\u52a1<\/td>\n \u63d0\u4f9b\u8d44\u6e90\u6216\u670d\u52a1<\/td>\n<\/tr>\n \u793a\u4f8b<\/td>\n \u6d4f\u89c8\u5668\u8fde\u63a5\u5230\u7f51\u7ad9<\/td>\n \u6258\u7ba1\u7f51\u7ad9\u7684 Web \u670d\u52a1\u5668<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u63d0\u793a\uff1a\u5728\u6784\u5efa\u7f51\u7edc\u5e94\u7528\u65f6\uff0c\u4e00\u5b9a\u8981\u5148\u51b3\u5b9a\u54ea\u4e00\u90e8\u5206\u5145\u5f53\u5ba2\u6237\u7aef\u3001\u54ea\u4e00\u90e8\u5206\u5145\u5f53\u670d\u52a1\u5668\u7aef\u3002\u8fd9\u4e2a\u51b3\u5b9a\u4f1a\u5f71\u54cd\u4f60\u5982\u4f55\u7f16\u5199\u4ee3\u7801\u4ee5\u53ca\u5e94\u7528\u5728\u7f51\u7edc\u4e2d\u7684\u5177\u4f53\u884c\u4e3a\u3002<\/p><\/blockquote>\n \u53ef\u4ee5\u770b\u5230\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u90fd\u4f7f\u7528 TCP \u534f\u8bae\uff0c\u4f46\u5b83\u4eec\u626e\u6f14\u7684\u89d2\u8272\u4e0d\u540c\uff1a\u5ba2\u6237\u7aef\u8d1f\u8d23\u201c\u5f00\u53e3\u8bf4\u8bdd\u201d\uff0c\u670d\u52a1\u5668\u7aef\u8d1f\u8d23\u201c\u7b49\u5f85\u5e76\u56de\u7b54\u201d\u3002\u53cc\u65b9\u90fd\u5fc5\u987b\u9075\u5b88\u534f\u8bae\uff0c\u624d\u80fd\u4fdd\u8bc1\u7f51\u7edc\u901a\u4fe1\u987a\u7545\u53ef\u9760\u3002<\/p>\n TCP \u8fde\u63a5\u8fc7\u7a0b<\/strong><\/h2>\n TCP \u8fde\u63a5\u5982\u4f55\u5f00\u59cb<\/h3>\n \u4f60\u8981\u542f\u52a8\u4e00\u4e2a TCP \u8fde\u63a5\uff0c\u9700\u8981\u5148\u8ba9\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u90fd\u4e3a\u901a\u4fe1\u505a\u597d\u51c6\u5907\u3002\u670d\u52a1\u5668\u5fc5\u987b\u5148\u5c31\u7eea\uff0c\u7136\u540e\u5ba2\u6237\u7aef\u518d\u5c1d\u8bd5\u8fde\u63a5\u3002\u4f60\u901a\u8fc7\u5957\u63a5\u5b57\u7f16\u7a0b\u521b\u5efa\u670d\u52a1\u5668\u5957\u63a5\u5b57\u3002\u670d\u52a1\u5668\u901a\u8fc7\u521b\u5efa\u5957\u63a5\u5b57\u3001\u5c06\u5176\u7ed1\u5b9a\u5230\u5730\u5740\u548c\u7aef\u53e3\u5e76\u5f00\u59cb\u76d1\u542c\u6765\u6267\u884c\u88ab\u52a8\u6253\u5f00\uff08passive open\uff09\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u901a\u5e38\u88ab\u79f0\u4e3a\u670d\u52a1\u5668\u76d1\u542c\u3002\u670d\u52a1\u5668\u5957\u63a5\u5b57\u968f\u540e\u4f1a\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u3002<\/p>\n \u5f53\u4f60\u4f7f\u7528\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u65f6\uff0c\u4f60\u4f1a\u53d1\u8d77\u4e00\u4e2a\u4e3b\u52a8\u6253\u5f00\uff08active open\uff09\u3002\u4f60\u5411\u670d\u52a1\u5668\u53d1\u9001\u8fde\u63a5\u8bf7\u6c42\u4ee5\u542f\u52a8\u8fde\u63a5\u3002\u5ba2\u6237\u7aef\u901a\u8fc7\u521b\u5efa\u5957\u63a5\u5b57\u8fdb\u884c\u5957\u63a5\u5b57\u521b\u5efa\uff08socket creation\uff09\uff0c\u7136\u540e\u5c1d\u8bd5\u8fde\u63a5\u5230\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3\u3002\u4f60\u4f9d\u8d56 TCP \u534f\u8bae\u6765\u7ba1\u7406\u8fd9\u4e2a\u8fc7\u7a0b\uff0c\u5e76\u786e\u4fdd\u901a\u4fe1\u53ef\u9760\u3002<\/p>\n \u670d\u52a1\u5668\u5e38\u5e38\u4f1a\u53d1\u51fa\u8bf8\u5982 OPEN\u3001USE \u548c READ \u4e4b\u7c7b\u7684\u547d\u4ee4\u6765\u5904\u7406\u8fde\u63a5\u3002\u8fd9\u4e9b\u547d\u4ee4\u5e2e\u52a9\u670d\u52a1\u5668\u7ba1\u7406\u5957\u63a5\u5b57\uff0c\u5e76\u4e3a\u4f20\u5165\u7684\u5b57\u8282\u6d41\u505a\u597d\u51c6\u5907\u3002\u5728\u4f60\u7f16\u5199\u57fa\u4e8e TCP \u5957\u63a5\u5b57\u7684\u7f51\u7edc\u5e94\u7528\u65f6\uff0c\u5c31\u80fd\u770b\u5230\u8fd9\u4e9b\u6b65\u9aa4\u3002<\/p>\n \u63d0\u793a\uff1a\u5fc5\u987b\u5148\u6709\u670d\u52a1\u5668\u5728\u76d1\u542c\uff0c\u5ba2\u6237\u7aef\u624d\u80fd\u8fde\u63a5\u3002\u5982\u679c\u670d\u52a1\u5668\u6ca1\u6709\u5728\u76d1\u542c\uff0c\u5ba2\u6237\u7aef\u5c31\u65e0\u6cd5\u5efa\u7acb TCP \u8fde\u63a5\u3002<\/p><\/blockquote>\n \u4e09\u6b21\u63e1\u624b\u6b65\u9aa4<\/h3>\n \u4f60\u4f1a\u4f7f\u7528 TCP \u534f\u8bae\u901a\u8fc7\u201c\u4e09\u6b21\u63e1\u624b\u201d\u6765\u5efa\u7acb\u8fde\u63a5\u3002\u63e1\u624b\u80fd\u786e\u4fdd\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u90fd\u540c\u610f\u901a\u4fe1\uff0c\u5e76\u5efa\u7acb\u4e00\u4e2a\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u901a\u9053\u3002\u4f60\u4f1a\u9075\u5faa\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n \n \u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a\u5e26\u6709\u968f\u673a\u5e8f\u5217\u53f7\u7684 SYN \u5305\uff0c\u7528\u6765\u8868\u660e\u8981\u53d1\u8d77\u8fde\u63a5\u3002<\/li>\n \u670d\u52a1\u5668\u56de\u590d\u4e00\u4e2a SYN-ACK \u5305\uff0cSYN \u90e8\u5206\u63d0\u4f9b\u670d\u52a1\u5668\u7684\u5e8f\u5217\u53f7\uff0cACK \u90e8\u5206\u5219\u5bf9\u5ba2\u6237\u7aef\u7684 SYN \u8fdb\u884c\u786e\u8ba4\u3002<\/li>\n \u5ba2\u6237\u7aef\u518d\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a ACK \u5305\uff0c\u786e\u8ba4\u5df2\u6536\u5230\u670d\u52a1\u5668\u53d1\u6765\u7684 SYN-ACK\u3002<\/li>\n<\/ol>\n \u5b8c\u6210\u8fd9\u4e9b\u6b65\u9aa4\u540e\uff0cTCP \u8fde\u63a5\u5c31\u5efa\u7acb\u597d\u4e86\u3002\u6b64\u65f6\u4f60\u53ef\u4ee5\u4f7f\u7528\u5957\u63a5\u5b57\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002\u901a\u8fc7\u63e1\u624b\uff0c\u53cc\u65b9\u8fd8\u80fd\u534f\u5546\u7a97\u53e3\u5927\u5c0f\u3001\u6700\u5927\u62a5\u6587\u6bb5\u957f\u5ea6\uff08MSS\uff09\u7b49\u53c2\u6570\u3002\u4f60\u5728\u8fdb\u884c\u5957\u63a5\u5b57\u7f16\u7a0b\u65f6\uff0c\u4f1a\u4f9d\u9760\u8fd9\u4e2a\u8fc7\u7a0b\u6765\u5b9e\u73b0\u53cc\u5411\u901a\u4fe1\u3002<\/p>\n \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n TCP \u72b6\u6001<\/th>\n \u8bf4\u660e<\/th>\n<\/tr>\n CLOSED<\/td>\n \u5c1a\u672a\u5f00\u59cb\u4efb\u4f55 TCP \u6d3b\u52a8\u3002<\/td>\n<\/tr>\n LISTEN<\/td>\n \u670d\u52a1\u5668\u5728\u7b49\u5f85\u8fde\u63a5\u8bf7\u6c42\u3002<\/td>\n<\/tr>\n SYN-SENT<\/td>\n \u5ba2\u6237\u7aef\u53d1\u9001 SYN \u540e\uff0c\u5728\u7b49\u5f85 ACK\u3002<\/td>\n<\/tr>\n SYN+ACK SENT<\/td>\n \u670d\u52a1\u5668\u53d1\u9001\u5bf9 SYN \u7684 ACK\uff0c\u540c\u65f6\u53d1\u9001\u81ea\u5df1\u7684 SYN \u8bf7\u6c42\u3002<\/td>\n<\/tr>\n SYN RCVD<\/td>\n \u670d\u52a1\u5668\u5df2\u63a5\u6536\u5230\u4e4b\u524d\u53d1\u9001 ACK \u65f6\u5bf9\u5e94\u7684 SYN\u3002<\/td>\n<\/tr>\n ESTABLISHED<\/td>\n \u63e1\u624b\u5b8c\u6210\uff0c\u53ef\u4ee5\u5f00\u59cb\u4f20\u8f93\u6570\u636e\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u4f60\u901a\u8fc7\u5957\u63a5\u5b57\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u521b\u5efa\u4e00\u4e2a\u5b57\u8282\u6d41\u3002TCP \u5957\u63a5\u5b57\u53ef\u4ee5\u8ba9\u4f60\u5728\u4e24\u4e2a\u65b9\u5411\u4e0a\u6536\u53d1\u6570\u636e\u3002\u8fd9\u4e00\u8fc7\u7a0b\u6784\u6210\u4e86\u7f51\u7edc\u7f16\u7a0b\u7684\u57fa\u7840\uff0c\u4f7f\u4f60\u80fd\u591f\u6784\u5efa\u53ef\u9760\u7684\u5e94\u7528\u3002<\/p>\n \u6ce8\u610f\uff1a\u4e09\u6b21\u63e1\u624b\u662f\u5efa\u7acb TCP \u8fde\u63a5\u7684\u5173\u952e\u6b65\u9aa4\u3002\u6ca1\u6709\u8fd9\u4e2a\u8fc7\u7a0b\uff0c\u4f60\u5c31\u65e0\u6cd5\u4fdd\u8bc1\u8bbe\u5907\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\u662f\u53ef\u9760\u7684\u3002<\/p><\/blockquote>\n \u8fde\u63a5\u7ec8\u6b62<\/h3>\n \u4f60\u5fc5\u987b\u6b63\u786e\u5730\u5173\u95ed TCP \u8fde\u63a5\uff0c\u624d\u80fd\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f\u5e76\u4fdd\u8bc1\u901a\u4fe1\u5e72\u51c0\u5229\u843d\u3002TCP \u534f\u8bae\u4f7f\u7528\u201c\u56db\u6b21\u6325\u624b\u201d\u6765\u7ec8\u6b62\u8fde\u63a5\u3002\u4f60\u4f1a\u9075\u5faa\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n \n \u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001 FIN \u5305\uff0c\u8868\u793a\u81ea\u5df1\u4e0d\u518d\u53d1\u9001\u6570\u636e\u3002\u5ba2\u6237\u7aef\u8fdb\u5165 FIN-WAIT-1 \u72b6\u6001\u3002<\/li>\n \u670d\u52a1\u5668\u7528 ACK \u786e\u8ba4\u8fd9\u4e2a FIN\uff0c\u5e76\u8fdb\u5165 CLOSE-WAIT \u72b6\u6001\u3002<\/li>\n \u670d\u52a1\u5668\u5728\u5b8c\u6210\u5269\u4f59\u6570\u636e\u53d1\u9001\u540e\uff0c\u518d\u53d1\u9001\u81ea\u5df1\u7684 FIN \u5305\uff0c\u5e76\u8fdb\u5165 LAST-ACK \u72b6\u6001\u3002<\/li>\n \u5ba2\u6237\u7aef\u7528\u6700\u540e\u4e00\u4e2a ACK \u786e\u8ba4\u670d\u52a1\u5668\u7684 FIN\uff0c\u5e76\u8fdb\u5165 TIME-WAIT \u72b6\u6001\u3002\u8d85\u65f6\u7ed3\u675f\u540e\uff0c\u8fde\u63a5\u88ab\u5f7b\u5e95\u5173\u95ed\u3002<\/li>\n<\/ol>\n \u5728\u4f60\u5173\u95ed\u5957\u63a5\u5b57\u7ed3\u675f\u6570\u636e\u4f20\u8f93\u65f6\uff0c\u5c31\u4f1a\u770b\u5230\u8fd9\u4e00\u8fc7\u7a0b\u3002TCP \u5957\u63a5\u5b57\u4f1a\u786e\u4fdd\u53cc\u65b9\u90fd\u5df2\u7ecf\u5b8c\u6210\u6570\u636e\u7684\u6536\u53d1\uff0c\u7136\u540e\u518d\u5173\u95ed\u8fde\u63a5\u3002\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\uff0c\u4f60\u5fc5\u987b\u8ba4\u771f\u5904\u7406\u8fde\u63a5\u7ec8\u6b62\uff0c\u4ee5\u7ef4\u62a4\u6574\u4f53\u7684\u7f51\u7edc\u7a33\u5b9a\u6027\u3002<\/p>\n \n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n \u6b65\u9aa4<\/th>\n \u89d2\u8272<\/th>\n \u52a8\u4f5c\u8bf4\u660e<\/th>\n \u72b6\u6001\u53d8\u5316<\/th>\n<\/tr>\n 1<\/td>\n \u5ba2\u6237\u7aef<\/td>\n \u53d1\u9001 FIN \u6bb5\u8868\u793a\u4e0d\u518d\u53d1\u9001\u66f4\u591a\u6570\u636e\u3002<\/td>\n \u8fdb\u5165 FIN-WAIT-1<\/td>\n<\/tr>\n 2<\/td>\n \u670d\u52a1\u5668<\/td>\n \u7528 ACK \u6bb5\u786e\u8ba4\u6536\u5230 FIN\u3002<\/td>\n \u8fdb\u5165 CLOSE-WAIT<\/td>\n<\/tr>\n 3<\/td>\n \u670d\u52a1\u5668<\/td>\n \u5728\u5b8c\u6210\u5269\u4f59\u6570\u636e\u4f20\u8f93\u540e\uff0c\u53d1\u9001\u81ea\u5df1\u7684 FIN\u3002<\/td>\n \u8fdb\u5165 LAST-ACK<\/td>\n<\/tr>\n 4<\/td>\n \u5ba2\u6237\u7aef<\/td>\n \u7528\u6700\u540e\u4e00\u4e2a ACK \u786e\u8ba4\u670d\u52a1\u5668\u7684 FIN\u3002<\/td>\n \u8fdb\u5165 TIME-WAIT<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \n TCP \u8fde\u63a5\u7ec8\u6b62\u4f7f\u7528\u56db\u6b65\u63e1\u624b\uff08FIN\u2013ACK \u4ea4\u6362\uff09\u3002<\/li>\n \u6bcf\u4e00\u7aef\u90fd\u53ef\u4ee5\u901a\u8fc7 FIN \u6807\u5fd7\u72ec\u7acb\u91ca\u653e\u81ea\u5df1\u7684\u8fde\u63a5\u65b9\u5411\u3002<\/li>\n \u8be5\u8fc7\u7a0b\u786e\u4fdd\u53cc\u65b9\u5728\u5b8c\u5168\u7ed3\u675f\u6570\u636e\u4f20\u8f93\u540e\u518d\u5f7b\u5e95\u5173\u95ed\u8fde\u63a5\u3002<\/li>\n<\/ul>\n \u63d0\u9192\uff1a\u5728\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u540e\uff0c\u4e00\u5b9a\u8981\u5173\u95ed\u5957\u63a5\u5b57\u3002\u8fd9\u6837\u80fd\u9632\u6b62\u8d44\u6e90\u6cc4\u6f0f\uff0c\u8ba9\u4f60\u7684\u7f51\u7edc\u5e94\u7528\u6301\u7eed\u7a33\u5b9a\u8fd0\u884c\u3002<\/p><\/blockquote>\n \u4f60\u901a\u8fc7 TCP \u5957\u63a5\u5b57\u53d1\u9001\u548c\u63a5\u6536\u5b57\u8282\u6d41\u3002TCP \u534f\u8bae\u4ece\u5efa\u7acb\u8fde\u63a5\u5230\u7ec8\u6b62\u8fde\u63a5\u5168\u7a0b\u8d1f\u8d23\u7ba1\u7406\uff0c\u5305\u62ec\u63e1\u624b\u4e0e\u5173\u95ed\u8fc7\u7a0b\u3002\u4f60\u4f9d\u9760\u8fd9\u4e9b\u6b65\u9aa4\u6784\u5efa\u5065\u58ee\u7684\u7f51\u7edc\u5e94\u7528\uff0c\u5e76\u5904\u7406\u8bbe\u5907\u4e4b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n TCP \u5ba2\u6237\u7aef\u4e0e TCP \u670d\u52a1\u5668\u7684\u89d2\u8272<\/strong><\/h2>\n TCP \u5ba2\u6237\u7aef\u7684\u804c\u8d23<\/h3>\n \u5f53\u4f60\u5728\u7f51\u7edc\u4e2d\u626e\u6f14\u5ba2\u6237\u7aef\u65f6\uff0c\u9700\u8981\u627f\u62c5\u591a\u9879\u91cd\u8981\u804c\u8d23\uff0c\u4ee5\u786e\u4fdd\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u987a\u7545\u3002\u4f60\u7684\u4e3b\u8981\u4efb\u52a1\u662f\u7ba1\u7406\u8fde\u63a5\uff0c\u5e76\u4fdd\u8bc1\u6570\u636e\u5728\u8bbe\u5907\u4e4b\u95f4\u53ef\u9760\u4f20\u8f93\u3002\u5178\u578b\u7684\u5ba2\u6237\u7aef\u804c\u8d23\u5305\u62ec\uff1a<\/p>\n \n \u901a\u8fc7\u4e09\u6b21\u63e1\u624b\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002<\/li>\n \u7ba1\u7406\u4f60\u7684\u8bbe\u5907\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u6570\u636e\u6d41\u3002<\/li>\n \u901a\u8fc7\u9519\u8bef\u68c0\u67e5\u548c\u91cd\u4f20\u673a\u5236\u6765\u786e\u4fdd\u6570\u636e\u5305\u53ef\u9760\u9001\u8fbe\u3002<\/li>\n \u6309\u7167\u6b63\u786e\u7684\u6b65\u9aa4\u7ec8\u6b62\u8fde\u63a5\uff0c\u5e76\u8fdb\u5165 FIN_WAIT_1\u3001FIN_WAIT_2 \u548c TIME_WAIT \u7b49\u72b6\u6001\u3002<\/li>\n<\/ol>\n \u4f60\u8fd8\u9700\u8981\u5728\u901a\u4fe1\u8fc7\u7a0b\u4e2d\u7ba1\u7406\u6570\u636e\u6d41\u548c\u9519\u8bef\u5904\u7406\u3002\u4e0b\u8868\u5c55\u793a\u4e86\u4f60\u5728\u5404\u4e2a\u9636\u6bb5\u7684\u5904\u7406\u65b9\u5f0f\uff1a<\/p>\n \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n \u6b65\u9aa4<\/th>\n \u8bf4\u660e<\/th>\n<\/tr>\n \u5efa\u7acb\u8fde\u63a5<\/td>\n \u4f60\u901a\u8fc7 SYN\u3001SYN-ACK \u548c ACK \u4e09\u6b21\u63e1\u624b\u6765\u542f\u52a8\u901a\u4fe1\u3002<\/td>\n<\/tr>\n \u6570\u636e\u4f20\u8f93<\/td>\n \u4f60\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u6bb5\u3001\u7f16\u53f7\u3001\u53d1\u9001\u3001\u63a5\u6536\u548c\u786e\u8ba4\uff0c\u786e\u4fdd\u5176\u6b63\u786e\u9001\u8fbe\u3002<\/td>\n<\/tr>\n \u6d41\u91cf\u63a7\u5236<\/td>\n \u4f60\u901a\u8fc7\u7a97\u53e3\u5927\u5c0f\u548c\u6ed1\u52a8\u7a97\u53e3\u6280\u672f\u6765\u8c03\u8282\u6570\u636e\u53d1\u9001\u901f\u7387\u3002<\/td>\n<\/tr>\n \u9519\u8bef\u5904\u7406<\/td>\n \u4f60\u4f7f\u7528\u6821\u9a8c\u548c\u3001\u91cd\u4f20\u4ee5\u53ca\u91cd\u590d\u68c0\u6d4b\u7b49\u673a\u5236\u6765\u4fdd\u8bc1\u6570\u636e\u6b63\u786e\u6027\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u63d0\u793a\uff1a\u65f6\u523b\u5173\u6ce8\u4f60\u7684\u5957\u63a5\u5b57\u72b6\u6001\u548c\u6570\u636e\u6d41\u91cf\uff0c\u4ee5\u4fdd\u969c\u7f51\u7edc\u901a\u4fe1\u7684\u53ef\u9760\u6027\u3002<\/p><\/blockquote>\n TCP \u670d\u52a1\u5668\u7684\u804c\u8d23<\/h3>\n \u4f5c\u4e3a\u670d\u52a1\u5668\uff0c\u4f60\u5728\u7f51\u7edc\u4e2d\u5904\u4e8e\u6838\u5fc3\u4f4d\u7f6e\u3002\u4f60\u5fc5\u987b\u8ba9\u5957\u63a5\u5b57\u5904\u4e8e\u53ef\u63a5\u53d7\u8fde\u63a5\u7684\u72b6\u6001\uff0c\u5e76\u80fd\u591f\u540c\u65f6\u7ba1\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u3002\u670d\u52a1\u5668\u7684\u4e3b\u8981\u804c\u8d23\u5305\u62ec\uff1a<\/p>\n \n \u521b\u5efa\u5957\u63a5\u5b57\u7528\u4e8e\u76d1\u542c\u4f20\u5165\u8fde\u63a5\u3002<\/li>\n \u5c06\u5957\u63a5\u5b57\u7ed1\u5b9a\u5230\u7279\u5b9a IP \u5730\u5740\u548c\u7aef\u53e3\u3002<\/li>\n \u76d1\u542c\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/li>\n \u63a5\u53d7\u8fde\u63a5\u5e76\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u521b\u5efa\u65b0\u7684\u5957\u63a5\u5b57\u3002<\/li>\n \u5728\u670d\u52a1\u5668\u4e0e\u5404\u5ba2\u6237\u7aef\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002<\/li>\n \u5728\u6570\u636e\u4f20\u8f93\u5b8c\u6210\u540e\uff0c\u4f18\u96c5\u5730\u5173\u95ed\u8fde\u63a5\u3002<\/li>\n<\/ol>\n \u4f60\u8fd8\u4f1a\u4f7f\u7528\u591a\u79cd\u673a\u5236\u6765\u4fdd\u6301\u901a\u4fe1\u53ef\u9760\u5e76\u7ba1\u7406\u8d44\u6e90\uff1a<\/p>\n \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n \u673a\u5236<\/th>\n \u8bf4\u660e<\/th>\n<\/tr>\n \u8fde\u63a5\u5efa\u7acb<\/td>\n \u4f60\u901a\u8fc7\u4e09\u6b21\u63e1\u624b\uff0c\u786e\u4fdd\u53cc\u65b9\u90fd\u5df2\u51c6\u5907\u597d\u8fdb\u884c\u901a\u4fe1\u3002<\/td>\n<\/tr>\n \u6d41\u91cf\u63a7\u5236<\/td>\n \u4f60\u901a\u8fc7\u6ed1\u52a8\u7a97\u53e3\u534f\u8bae\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u9632\u6b62\u5bf9\u7aef\u8fc7\u8f7d\u3002<\/td>\n<\/tr>\n \u9519\u8bef\u6821\u6b63<\/td>\n \u4f60\u68c0\u67e5\u5e76\u66f4\u6b63\u9519\u8bef\uff0c\u4ee5\u4fdd\u8bc1\u6570\u636e\u51c6\u786e\u65e0\u8bef\u3002<\/td>\n<\/tr>\n \u62e5\u585e\u63a7\u5236<\/td>\n \u4f60\u4f7f\u7528\u5404\u79cd\u7b97\u6cd5\u907f\u514d\u7f51\u7edc\u62e5\u585e\uff0c\u4fdd\u6301\u6570\u636e\u9ad8\u6548\u4f20\u8f93\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u5178\u578b\u4ea4\u4e92\u573a\u666f<\/h3>\n \u5728\u771f\u5b9e\u5e94\u7528\u4e2d\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u4ea4\u4e92\u573a\u666f\u975e\u5e38\u591a\u6837\u3002\u4f8b\u5982\uff0cDHCP \u5ba2\u6237\u7aef\u5728\u52a0\u5165\u7f51\u7edc\u65f6\u4f1a\u5411 DHCP \u670d\u52a1\u5668\u8bf7\u6c42 IP \u5730\u5740\uff1bHTTP \u5ba2\u6237\u7aef\u4f1a\u5b9a\u671f\u5411 Web \u670d\u52a1\u5668\u67e5\u8be2\u66f4\u65b0\uff0c\u6bd4\u5982\u63a7\u5236\u5bb6\u4e2d\u7684\u667a\u80fd\u8bbe\u5907\u3002\u6709\u65f6\uff0c\u540c\u4e00\u53f0\u8bbe\u5907\u65e2\u53ef\u4ee5\u662f\u5ba2\u6237\u7aef\uff0c\u53c8\u53ef\u4ee5\u662f\u670d\u52a1\u5668\uff0c\u6bd4\u5982\u67d0\u5757\u63a7\u5236\u677f\u65e2\u6258\u7ba1\u914d\u7f6e\u9875\u9762\uff0c\u53c8\u540c\u65f6\u5411\u5176\u4ed6\u670d\u52a1\u5668\u83b7\u53d6\u66f4\u65b0\u3002<\/p>\n TCP \u5141\u8bb8\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u540c\u65f6\u8fdb\u884c\u6570\u636e\u6536\u53d1\u3002\u6bcf\u4e00\u65b9\u90fd\u4f1a\u7ef4\u62a4\u81ea\u5df1\u7684\u5e8f\u5217\u53f7\uff0c\u56e0\u6b64\u4f60\u53ef\u4ee5\u8fdb\u884c\u53cc\u5411\u901a\u4fe1\u800c\u4e0d\u4f1a\u6df7\u6dc6\u6570\u636e\u6d41\u3002<\/p>\n \u4f60\u5e38\u5e38\u4f1a\u53d1\u73b0\uff0c\u670d\u52a1\u5668\u5728\u5b8c\u6210\u67d0\u4e2a\u64cd\u4f5c\u540e\u4f1a\u4e3b\u52a8\u65ad\u5f00\u5ba2\u6237\u7aef\u8fde\u63a5\u4ee5\u8282\u7701\u5e26\u5bbd\u3002\u8fd9\u4e2a\u505a\u6cd5\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u7f51\u7edc\u6548\u7387\uff0c\u5c24\u5176\u662f\u5728\u5927\u91cf\u8bbe\u5907\u540c\u65f6\u8fde\u63a5\u65f6\u3002<\/p>\n TCP \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u793a\u4f8b<\/strong><\/h2>\n \u7b80\u5355\u7684 TCP \u5ba2\u6237\u7aef\u4ee3\u7801<\/h3>\n \u4f60\u53ef\u4ee5\u4ece\u521b\u5efa\u4e00\u4e2a\u57fa\u7840\u7684\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u5165\u95e8\u5957\u63a5\u5b57\u7f16\u7a0b\u3002\u8be5\u5ba2\u6237\u7aef\u4f1a\u8fde\u63a5\u5230\u670d\u52a1\u5668\u5957\u63a5\u5b57\u5e76\u8bfb\u53d6\u5b57\u8282\u6d41\u3002\u4f60\u901a\u8fc7\u5957\u63a5\u5b57\u521b\u5efa\uff08socket creation\uff09\u6765\u5efa\u7acb\u8fde\u63a5\uff0c\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42\u5e76\u63a5\u6536\u6765\u81ea\u670d\u52a1\u5668\u7684\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u793a\u4f8b\uff1a<\/p>\n \u4e00\u4e2a\u7b80\u5355 TCP \u5ba2\u6237\u7aef\u7684\u5173\u952e\u7ec4\u6210\u90e8\u5206\u5305\u62ec\uff1a<\/p>\n \n \u521b\u5efa TcpClient \u5b9e\u4f8b\u3002<\/li>\n \u4f7f\u7528 ConnectAsync \u8fde\u63a5\u5230\u670d\u52a1\u5668\u3002<\/li>\n \u901a\u8fc7 NetworkStream \u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<\/ol>\n var ipEndPoint = new IPEndPoint(ipAddress, 13);\r\nusing TcpClient client = new();\r\nawait client.ConnectAsync(ipEndPoint);\r\nawait using NetworkStream stream = client.GetStream();\r\nvar buffer = new byte[1_024];\r\nint received = await stream.ReadAsync(buffer);\r\nvar message = Encoding.UTF8.GetString(buffer, 0, received);\r\nConsole.WriteLine($\"Message received: \\\"{message}\\\"\");\r\n<\/code><\/pre>\n<\/blockquote>\n \u4f60\u521b\u5efa\u4e00\u4e2a\u5957\u63a5\u5b57\uff0c\u8fde\u63a5\u5230\u670d\u52a1\u5668\uff0c\u7136\u540e\u4ece\u6d41\u4e2d\u8bfb\u53d6\u5b57\u8282\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u8be5\u6d41\u5bf9\u8c61\u6765\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002\u8fd9\u4e00\u8fc7\u7a0b\u6784\u6210\u4e86\u7f51\u7edc\u7f16\u7a0b\u7684\u57fa\u7840\u3002<\/p>\n \u7b80\u5355\u7684 TCP \u670d\u52a1\u5668\u4ee3\u7801<\/h3>\n \u4f60\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u670d\u52a1\u5668\u5957\u63a5\u5b57\u5e76\u76d1\u542c\u4f20\u5165\u8fde\u63a5\u6765\u642d\u5efa\u4e00\u4e2a TCP \u670d\u52a1\u5668\u3002\u670d\u52a1\u5668\u5957\u63a5\u5b57\u4f1a\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\uff0c\u4f60\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u5f00\u542f\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u5e76\u5411\u5176\u53d1\u9001\u5b57\u8282\u3002\u57fa\u672c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n \n \u5bfc\u5165\u7f51\u7edc\u548c\u5e76\u53d1\u76f8\u5173\u7684\u5fc5\u8981\u5e93\u3002<\/li>\n \u4f7f\u7528 TcpListener \u7ed1\u5b9a\u5730\u5740\u5e76\u76d1\u542c\u8fde\u63a5\u3002<\/li>\n \u5b9e\u73b0\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\u6765\u6301\u7eed\u63a5\u53d7\u65b0\u8fde\u63a5\u3002<\/li>\n \u5728\u65b0\u7684\u7ebf\u7a0b\u4e2d\u5904\u7406\u6bcf\u4e2a\u8fde\u63a5\u3002<\/li>\n \u901a\u8fc7\u6d41\u6536\u53d1\u6570\u636e\u3002<\/li>\n \u5728\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u540e\u5173\u95ed\u8fde\u63a5\u3002<\/li>\n<\/ol>\n \n package main\r\n\r\nimport (\r\n\"fmt\"\r\n\"net\"\r\n)\r\n\r\nfunc main() {\r\nlistener, err := net.Listen(\"tcp\", \"localhost:8080\")\r\nif err != nil {\r\nfmt.Println(\"Error:\", err)\r\nreturn\r\n}\r\ndefer listener.Close()\r\n\r\nfmt.Println(\"Server is listening on port 8080\")\r\n\r\nfor {\r\nconn, err := listener.Accept()\r\nif err != nil {\r\nfmt.Println(\"Error:\", err)\r\ncontinue\r\n}\r\ngo handleClient(conn)\r\n}\r\n}\r\n\r\nfunc handleClient(conn net.Conn) {\r\ndefer conn.Close()\r\n\/\/ Read and process data from the client\r\n\/\/ Write data back to the client\r\n}\r\n<\/code><\/pre>\n<\/blockquote>\n \u4f60\u901a\u8fc7\u670d\u52a1\u5668\u76d1\u542c\u6765\u7b49\u5f85\u8fde\u63a5\uff0c\u7136\u540e\u901a\u8fc7\u6d41\u6765\u6536\u53d1\u5b57\u8282\u3002\u5728\u5b8c\u6210\u901a\u4fe1\u540e\uff0c\u518d\u5173\u95ed\u670d\u52a1\u5668\u5957\u63a5\u5b57\u3002<\/p>\n \u793a\u4f8b\u6d41\u7a0b\u89e3\u6790<\/h3>\n \u4f60\u53ef\u4ee5\u901a\u8fc7\u4e00\u6b65\u6b65\u7684\u6d41\u7a0b\u6765\u7406\u89e3\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u662f\u5982\u4f55\u4ea4\u4e92\u7684\u3002\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u884c\u5b57\u8282\uff0c\u670d\u52a1\u5668\u8bfb\u53d6\u540e\u518d\u539f\u6837\u56de\u4f20\uff0c\u5ba2\u6237\u7aef\u518d\u63a5\u6536\u5e76\u6253\u5370\u8fd9\u884c\u56de\u663e\u7684\u5b57\u8282\u3002<\/p>\n \n \u5ba2\u6237\u7aef\u4ece\u81ea\u8eab\u8f93\u5165\u8bfb\u53d6\u4e00\u884c\u5b57\u8282\uff0c\u5e76\u5c06\u5176\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u3002<\/li>\n \u670d\u52a1\u5668\u5957\u63a5\u5b57\u63a5\u6536\u8fd9\u4e9b\u5b57\u8282\uff0c\u5e76\u5c06\u5176\u56de\u4f20\u7ed9\u5ba2\u6237\u7aef\u3002<\/li>\n \u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u63a5\u6536\u8fd9\u4e9b\u5b57\u8282\u5e76\u663e\u793a\u51fa\u6765\u3002<\/li>\n<\/ol>\n \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n \u89d2\u8272<\/th>\n \u6b65\u9aa4<\/th>\n<\/tr>\n \u5ba2\u6237\u7aef<\/td>\n 1. \u4f7f\u7528 socket() \u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u3002<\/td>\n<\/tr>\n <\/td>\n 2. \u4f7f\u7528 connect() \u51fd\u6570\u5c06\u5957\u63a5\u5b57\u8fde\u63a5\u5230\u670d\u52a1\u5668\u5730\u5740\u3002<\/td>\n<\/tr>\n <\/td>\n 3. \u4f7f\u7528 read() \u548c write() \u51fd\u6570\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002<\/td>\n<\/tr>\n \u670d\u52a1\u5668<\/td>\n 1. \u4f7f\u7528 socket() \u51fd\u6570\u521b\u5efa\u5957\u63a5\u5b57\u3002<\/td>\n<\/tr>\n <\/td>\n 2. \u4f7f\u7528 bind() \u51fd\u6570\u5c06\u5957\u63a5\u5b57\u7ed1\u5b9a\u5230\u5730\u5740\u3002<\/td>\n<\/tr>\n <\/td>\n 3. \u4f7f\u7528 listen() \u51fd\u6570\u76d1\u542c\u8fde\u63a5\u3002<\/td>\n<\/tr>\n <\/td>\n 4. \u4f7f\u7528 accept() \u51fd\u6570\u63a5\u53d7\u8fde\u63a5\u3002<\/td>\n<\/tr>\n <\/td>\n 5. \u4f7f\u7528 send() \u548c recv() \u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u4f60\u901a\u8fc7\u5957\u63a5\u5b57\u7f16\u7a0b\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u5efa\u7acb\u5b57\u8282\u6d41\u3002\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\uff0c\u4f60\u5c31\u80fd\u5b9e\u73b0\u53cc\u5411\u901a\u4fe1\u3002\u4f60\u53ef\u4ee5\u5c1d\u8bd5\u81ea\u5df1\u7f16\u5199\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u5957\u63a5\u5b57\u4ee3\u7801\uff0c\u4ee5\u66f4\u76f4\u89c2\u5730\u7406\u89e3\u8fde\u63a5\u662f\u5982\u4f55\u5de5\u4f5c\u7684\u3002<\/p>\n \n <\/div>\n<\/div>\n \u73b0\u5728\u4f60\u5df2\u7ecf\u7406\u89e3\uff0c\u5728\u4e00\u4e2a TCP \u8fde\u63a5\u4e2d\uff0c\u5ba2\u6237\u7aef\u8d1f\u8d23\u8bf7\u6c42\u8d44\u6e90\uff0c\u800c\u670d\u52a1\u5668\u8d1f\u8d23\u63d0\u4f9b\u8d44\u6e90\u3002\u8fd9\u4e9b\u77e5\u8bc6\u80fd\u5e2e\u52a9\u4f60\u6784\u5efa\u53ef\u9760\u7684\u7f51\u7edc\u5e94\u7528\uff0c\u5e76\u66f4\u5feb\u5730\u89e3\u51b3\u95ee\u9898\u3002\u4f60\u53ef\u4ee5\u5728\u4e0b\u8868\u4e2d\u518d\u56de\u987e\u4e00\u4e0b\u53cc\u65b9\u7684\u4e3b\u8981\u89d2\u8272\uff1a<\/p>\n \n\n\n\n<\/colgroup>\n\n\n\n\n \u89d2\u8272<\/th>\n \u8bf4\u660e<\/th>\n<\/tr>\n \u5ba2\u6237\u7aef<\/td>\n \u5411\u670d\u52a1\u5668\u8bf7\u6c42\u4fe1\u606f\u6216\u8d44\u6e90\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/td>\n<\/tr>\n \u670d\u52a1\u5668<\/td>\n \u5411\u5ba2\u6237\u7aef\u63d0\u4f9b\u4fe1\u606f\u6216\u8d44\u6e90\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u901a\u5e38\u6301\u7eed\u8fd0\u884c\u5e76\u7b49\u5f85\u8bf7\u6c42\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u5f53\u4f60\u540c\u65f6\u7406\u89e3\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u4e4b\u540e\uff0c\u5c31\u80fd\u5728\u9879\u76ee\u4e2d\u663e\u8457\u63d0\u5347\u9c81\u68d2\u6027\u3001\u53ef\u9760\u6027\u3001\u8d44\u6e90\u7ba1\u7406\u548c\u5b89\u5168\u6027\u3002\u8bd5\u7740\u4eb2\u81ea\u7f16\u5199\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4ee3\u7801\uff0c\u4eb2\u624b\u4f53\u9a8c\u8fde\u63a5\u5728\u5b9e\u9645\u4e2d\u7684\u5de5\u4f5c\u65b9\u5f0f\u3002<\/p>\n \u5e38\u89c1\u95ee\u9898\uff08FAQ\uff09<\/strong><\/h2>\n TCP \u5ba2\u6237\u7aef\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/h3>\n \u4f60\u4f7f\u7528 TCP \u5ba2\u6237\u7aef\u6765\u4e3b\u52a8\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42\u5e76\u63a5\u6536\u54cd\u5e94\uff0c\u8fd9\u4e2a\u89d2\u8272\u5e2e\u52a9\u4f60\u8bbf\u95ee\u7f51\u7edc\u4e0a\u7684\u8d44\u6e90\u6216\u670d\u52a1\u3002<\/p>\n \u4e3a\u4ec0\u4e48\u5fc5\u987b\u5728\u5ba2\u6237\u7aef\u8fde\u63a5\u4e4b\u524d\u5148\u8ba9\u670d\u52a1\u5668\u76d1\u542c\uff1f<\/h3>\n \u4f60\u9700\u8981\u8ba9\u670d\u52a1\u5668\u5148\u5904\u4e8e\u76d1\u542c\u72b6\u6001\uff0c\u624d\u80fd\u63a5\u53d7\u4f20\u5165\u8fde\u63a5\u3002\u5982\u679c\u670d\u52a1\u5668\u6ca1\u6709\u5728\u76d1\u542c\uff0c\u4f60\u7684\u5ba2\u6237\u7aef\u5c31\u65e0\u6cd5\u5efa\u7acb TCP \u8fde\u63a5\u3002\u76d1\u542c\u662f\u670d\u52a1\u5668\u4e3a\u901a\u4fe1\u505a\u597d\u51c6\u5907\u7684\u524d\u63d0\u3002<\/p>\n \u4e00\u53f0\u8bbe\u5907\u53ef\u4ee5\u540c\u65f6\u4f5c\u4e3a\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u5417\uff1f<\/h3>\n \u53ef\u4ee5\u3002\u6bd4\u5982\uff0c\u4f60\u7684\u7535\u8111\u65e2\u53ef\u4ee5\u6258\u7ba1\u4e00\u4e2a\u7f51\u9875\uff0c\u53c8\u53ef\u4ee5\u540c\u65f6\u8fde\u63a5\u5230\u53e6\u4e00\u53f0\u670d\u52a1\u5668\u83b7\u53d6\u66f4\u65b0\u3002\u8fd9\u79cd\u8bbe\u7f6e\u53ef\u4ee5\u5b9e\u73b0\u66f4\u52a0\u7075\u6d3b\u7684\u901a\u4fe1\u3002<\/p>\n TCP \u5982\u4f55\u4fdd\u8bc1\u6570\u636e\u53ef\u9760\u4f20\u8f93\uff1f<\/h3>\n TCP \u4f1a\u5bf9\u6bcf\u4e2a\u6570\u636e\u5305\u8fdb\u884c\u9519\u8bef\u68c0\u6d4b\uff0c\u5e76\u901a\u8fc7\u786e\u8ba4\u673a\u5236\uff08ACK\uff09\u6765\u4fdd\u8bc1\u53ef\u9760\u6027\u3002\u5982\u679c\u6570\u636e\u4e22\u5931\uff0cTCP \u4f1a\u89e6\u53d1\u91cd\u4f20\u3002\u901a\u8fc7\u8fd9\u4e00\u7cfb\u5217\u8fc7\u7a0b\uff0c\u5b83\u53ef\u4ee5\u4fdd\u8bc1\u4f60\u7684\u6d88\u606f\u5b89\u5168\u4e14\u6309\u987a\u5e8f\u62b5\u8fbe\u3002<\/p>\n \u5982\u679c\u4f60\u5fd8\u8bb0\u5173\u95ed\u4e00\u4e2a TCP \u5957\u63a5\u5b57\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h3>\n \u5982\u679c\u4f60\u8ba9\u5957\u63a5\u5b57\u4e00\u76f4\u4fdd\u6301\u6253\u5f00\u72b6\u6001\uff0c\u7a0b\u5e8f\u5c31\u53ef\u80fd\u767d\u767d\u5360\u7528\u8d44\u6e90\uff0c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u548c\u4e0d\u7a33\u5b9a\u7684\u7f51\u7edc\u884c\u4e3a\u3002\u56e0\u6b64\uff0c\u5728\u5b8c\u6210\u6570\u636e\u6536\u53d1\u540e\uff0c\u4e00\u5b9a\u8981\u5173\u95ed\u5957\u63a5\u5b57\u3002[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":" [vc_row][vc_column][vc_column_text css=””]\u5728\u5b66\u4e60TCP \u901a\u4fe1\u65f6\uff0c\u4f60\u7ecf\u5e38\u4f1a\u770b\u5230\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u8fd9\u4e24\u4e2a\u672f\u8bed\uff0c\u5c24\u5176\u662f\u5728\u7c7b\u4f3c\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u8fd9\u6837\u7684\u73af\u5883\u4e2d\u3002\u5ba2\u6237\u7aef\u4fa7\u91cd\u4e8e\u4f60\u7684\u8bbe\u5907\u5982\u4f55\u8fde\u63a5\u5230\u7f51\u7edc\u5e76\u53d1\u51fa\u8bf7\u6c42\uff1b\u670d\u52a1\u5668\u7aef\u5219\u8d1f\u8d23\u76d1\u542c\u8fd9\u4e9b\u8bf7\u6c42\u5e76\u4f5c\u51fa\u54cd\u5e94\u3002\u7406\u89e3\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u7aef\u7684\u89d2\u8272\uff0c\u6709\u52a9\u4e8e\u4f60\u6784\u5efa\u53ef\u9760\u7684\u5ba2\u6237\u7aef\u2013\u670d\u52a1\u5668\u901a\u4fe1\u5e76\u6392\u67e5\u95ee\u9898\u3002\u4f60\u901a\u8fc7\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u6765\u53d1\u8d77\u8fde\u63a5\u3002\u6bcf\u4e00\u4e2a TCP \u5ba2\u6237\u7aef\u90fd\u4f1a\u4e0e\u7f51\u7edc\u4ea4\u4e92\uff0c\u4ece\u800c\u5728\u8bbe\u5907\u4e4b\u95f4\u5b9e\u73b0\u901a\u4fe1\u3002 \u4e86\u89e3 TCP \u7684\u5de5\u4f5c\u65b9\u5f0f\uff0c\u80fd\u5e2e\u52a9\u4f60\u5efa\u7acb\u7a33\u5065\u7684\u8fde\u63a5\uff0c\u5e76\u63d0\u5347\u4f60\u7684\u7f51\u7edc\u6280\u80fd\u3002 \u8981\u70b9\u603b\u7ed3 \u5ba2\u6237\u7aef\u901a\u8fc7\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u6765\u53d1\u8d77\u901a\u4fe1\uff0c\u662f\u5efa\u7acb\u8fde\u63a5\u7684\u5173\u952e\u4e00\u65b9\u3002 \u670d\u52a1\u5668\u7aef\u76d1\u542c\u4f20\u5165\u8bf7\u6c42\u5e76\u4f5c\u51fa\u54cd\u5e94\uff0c\u786e\u4fdd\u5ba2\u6237\u7aef\u83b7\u5f97\u6b63\u786e\u7684\u6570\u636e\u6216\u670d\u52a1\u3002 \u7406\u89e3\u4e09\u6b21\u63e1\u624b\uff08SYN\u3001SYN-ACK\u3001ACK\uff09\u5bf9\u4e8e\u5efa\u7acb\u53ef\u9760\u7684 TCP \u8fde\u63a5\u81f3\u5173\u91cd\u8981\u3002 \u6b63\u786e\u5173\u95ed TCP \u8fde\u63a5\u53ef\u4ee5\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f\u5e76\u4fdd\u6301\u7f51\u7edc\u7a33\u5b9a\uff0c\u56e0\u6b64\u8981\u65f6\u523b\u8bb0\u5f97\u5173\u95ed\u5957\u63a5\u5b57\u3002 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\u7b49\u534f\u8bae\u4e0e\u5176\u4ed6\u8bbe\u5907\u901a\u4fe1\u65b9\u9762\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002 \u5728 TCP \u901a\u4fe1\u4e2d\uff0c\u4f60\u5728\u5ba2\u6237\u7aef\u4fa7\u901a\u5e38\u4f1a\u6267\u884c\u4ee5\u4e0b\u4e3b\u8981\u529f\u80fd\uff1a \u901a\u8fc7\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u6765\u53d1\u8d77\u901a\u4fe1\u3002 \u4f7f\u7528\u5957\u63a5\u5b57\u5efa\u7acb\u8fde\u63a5\uff0c\u8fd9\u662f TCP \u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u4e00\u6b65\u3002 \u5728\u53d1\u9001\u8bf7\u6c42\u540e\u7b49\u5f85\u670d\u52a1\u5668\u7684\u54cd\u5e94\u3002 \u5f53\u4f60\u542f\u52a8\u4e00\u4e2a TCP \u8fde\u63a5\u65f6\uff0c\u4f1a\u9075\u5faa\u4e00\u4e2a\u7279\u5b9a\u7684\u8fc7\u7a0b\u3002\u5ba2\u6237\u7aef\u9996\u5148\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a SYN \u5305\u4ee5\u5f00\u59cb\u63e1\u624b\uff1b\u670d\u52a1\u5668\u7528\u4e00\u4e2a SYN-ACK \u5305\u8fdb\u884c\u54cd\u5e94\uff1b\u968f\u540e\u4f60\u518d\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a ACK 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