{"id":35247,"date":"2025-05-03T17:50:46","date_gmt":"2025-05-03T09:50:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/35247.html"},"modified":"2025-05-03T17:50:46","modified_gmt":"2025-05-03T09:50:46","slug":"time_wait%e7%8a%b6%e6%80%81udp%e6%a6%82%e5%bf%b5%e5%8f%8a%e6%a8%a1%e6%8b%9f%e5%ae%9e%e7%8e%b0%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%92%8c%e5%ae%a2%e6%88%b7%e7%ab%af%e6%94%b6%e5%8f%91%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/35247.html","title":{"rendered":"TIME_WAIT\u72b6\u6001+UDP\u6982\u5ff5\u53ca\u6a21\u62df\u5b9e\u73b0\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u6536\u53d1\u6570\u636e"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\n

\u4e00\u3001TIME_WAIT\u72b6\u6001\u5b58\u5728\u7684\u539f\u56e0<\/p>\n

\u4e8c\u3001TIME_WAIT\u72b6\u6001\u5b58\u5728\u7684\u610f\u4e49<\/p>\n

\u4e09\u3001TIME_WAIT\u72b6\u6001\u7684\u4f5c\u7528<\/p>\n

\u56db\u3001UDP\u7684\u57fa\u672c\u6982\u5ff5<\/p>\n

4.1 \u6982\u5ff5<\/p>\n

4.2 \u7279\u70b9<\/p>\n

\u4e94\u3001\u6a21\u62df\u5b9e\u73b0UDP\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u6536\u53d1\u6570\u636e<\/p>\n

5.1 \u670d\u52a1\u5668udpser<\/p>\n

5.2 \u5ba2\u6237\u7aefudpcil\u00a0<\/p>\n

\n

\u4e00\u3001TIME_WAIT\u72b6\u6001\u5b58\u5728\u7684\u539f\u56e0<\/h2>\n

1.\u53ef\u9760\u7684\u7ec8\u6b62TCP\u8fde\u63a5\u3002<\/p>\n

2.\u4fdd\u8bc1\u8ba9\u8fdf\u6765\u7684TCP\u62a5\u6587\u6bb5\u6709\u8db3\u591f\u7684\u65f6\u95f4\u88ab\u8bc6\u522b\u5e76\u4e22\u5f03\u3002<\/p>\n

\u4e8c\u3001TIME_WAIT\u72b6\u6001\u5b58\u5728\u7684\u610f\u4e49<\/h2>\n

TIME_WAIT\u72b6\u6001\u5b58\u5728\u7684\u4e3b\u8981\u76ee\u7684\u662f\u4e3a\u4e86\u786e\u4fdd\u5df2\u4f20\u8f93\u7684\u6570\u636e\u5728\u7f51\u7edc\u4e2d\u6b63\u786e\u5730\u5230\u8fbe\u76ee\u7684\u5730，\u540c\u65f6\u907f\u514d\u51fa\u73b0\u6570\u636e\u5305\u91cd\u590d\u53d1\u9001\u6216\u6df7\u4e71\u7684\u60c5\u51b5\u3002<\/p>\n

\u4e09\u3001TIME_WAIT\u72b6\u6001\u7684\u4f5c\u7528<\/h2>\n
  • \n

    \u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u5b8c\u6574\u6027：\u5728\u53d1\u9001\u7aef\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u540e，\u4e3b\u52a8\u5173\u95ed\u8fde\u63a5\u7684\u4e00\u65b9\u4f1a\u8fdb\u5165TIME_WAIT\u72b6\u6001，\u6b64\u65f6\u4f1a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4，\u4ee5\u786e\u4fdd\u5bf9\u65b9\u63a5\u6536\u5230\u4e86\u6240\u6709\u6570\u636e，\u5e76\u4e14\u6210\u529f\u54cd\u5e94\u4e86\u5173\u95ed\u8fde\u63a5\u7684\u8bf7\u6c42\u3002\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u6570\u636e\u7684\u5b8c\u6574\u6027，\u907f\u514d\u6570\u636e\u4e22\u5931\u6216\u635f\u574f\u3002<\/p>\n<\/li>\n

  • \n

    \u9632\u6b62\u51fa\u73b0\u6df7\u4e71\u7684\u8fde\u63a5\u72b6\u6001：TIME_WAIT\u72b6\u6001\u53ef\u4ee5\u786e\u4fdd\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u4e0d\u4f1a\u91cd\u7528\u76f8\u540c\u7684\u672c\u5730\u7aef\u53e3\u548c\u8fdc\u7a0b\u7aef\u53e3\u7684\u8fde\u63a5，\u9632\u6b62\u65b0\u7684\u8fde\u63a5\u4e0e\u4e4b\u524d\u7684\u8fde\u63a5\u6df7\u6dc6，\u5bfc\u81f4\u6570\u636e\u6df7\u4e71\u6216\u8fde\u63a5\u5931\u8d25\u3002<\/p>\n<\/li>\n

  • \n

    \u5904\u7406\u5ef6\u8fdf\u7684\u6570\u636e\u5305：\u5728TIME_WAIT\u72b6\u6001\u4e0b，\u53ef\u4ee5\u5904\u7406\u7531\u4e8e\u7f51\u7edc\u5ef6\u8fdf\u800c\u5bfc\u81f4\u7684\u5ef6\u8fdf\u6570\u636e\u5305，\u4ee5\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u987a\u5229\u5b8c\u6210\u3002\u6b64\u5916，TIME_WAIT\u72b6\u6001\u8fd8\u53ef\u4ee5\u907f\u514d\u5728\u7f51\u7edc\u4e2d\u4ea7\u751f\u51b2\u7a81\u6216\u91cd\u590d\u6570\u636e\u5305\u53d1\u9001\u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n

    \u7b80\u800c\u8a00\u4e4b，TIME_WAIT\u72b6\u6001\u7684\u5b58\u5728\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u548c\u5b8c\u6574\u6027，\u540c\u65f6\u907f\u514d\u7f51\u7edc\u8fde\u63a5\u7684\u6df7\u4e71\u548c\u51b2\u7a81，\u63d0\u9ad8\u7f51\u7edc\u901a\u4fe1\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n

    \u56db\u3001UDP\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

    4.1 \u6982\u5ff5<\/h3>\n

    UDP（User Datagram Protocol，\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae）\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u3001\u7b80\u5355\u548c\u9ad8\u6548<\/span>\u7684\u7f51\u7edc\u4f20\u8f93\u534f\u8bae\u3002UDP\u63d0\u4f9b\u4e86\u4e00\u79cd\u4e0d\u53ef\u9760\u7684\u3001\u65e0\u5e8f<\/span>\u7684\u6570\u636e\u4f20\u8f93\u670d\u52a1，\u76f8\u6bd4\u4e8eTCP\u534f\u8bae，UDP\u4e0d\u5177\u5907\u5efa\u7acb\u8fde\u63a5\u3001\u53ef\u9760\u4f20\u8f93\u548c\u6570\u636e\u91cd\u4f20\u7b49\u7279\u6027\u3002<\/p>\n

    \u603b\u7684\u6765\u8bf4，UDP\u662f\u4e00\u79cd\u7b80\u5355\u3001\u9ad8\u6548\u7684\u4f20\u8f93\u534f\u8bae，\u9002\u7528\u4e8e\u5bf9\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u548c\u5b9e\u65f6\u6027\u8981\u6c42\u8f83\u9ad8，\u5bf9\u6570\u636e\u51c6\u786e\u6027\u8981\u6c42\u8f83\u4f4e\u7684\u573a\u666f\u3002<\/p>\n

    4.2 \u7279\u70b9<\/h3>\n
  • \n

    \u65e0\u8fde\u63a5：UDP\u4e0d\u9700\u8981\u50cfTCP\u90a3\u6837\u5efa\u7acb\u8fde\u63a5\u548c\u7ef4\u62a4\u72b6\u6001，\u56e0\u6b64\u53ef\u4ee5\u66f4\u5feb\u901f\u5730\u4f20\u8f93\u6570\u636e\u3002\u6bcf\u4e2aUDP\u6570\u636e\u5305\u90fd\u662f\u72ec\u7acb\u7684，\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u4e4b\u95f4\u6ca1\u6709\u76f4\u63a5\u7684\u5173\u8054，\u56e0\u6b64UDP\u9002\u7528\u4e8e\u5b9e\u65f6\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/li>\n

  • \n

    \u4e0d\u53ef\u9760\u6027：UDP\u4e0d\u63d0\u4f9b\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\u670d\u52a1，\u6570\u636e\u5305\u53ef\u80fd\u4e22\u5931\u3001\u91cd\u590d\u6216\u4e71\u5e8f\u5230\u8fbe，\u63a5\u6536\u65b9\u65e0\u6cd5\u68c0\u6d4b\u5230\u8fd9\u4e9b\u95ee\u9898\u3002\u56e0\u6b64，\u5728\u5bf9\u6570\u636e\u7684\u51c6\u786e\u6027\u8981\u6c42\u4e0d\u90a3\u4e48\u9ad8\u7684\u573a\u5408，\u53ef\u4ee5\u9009\u62e9UDP\u534f\u8bae\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<\/li>\n

  • \n

    \u9762\u5411\u62a5\u6587：UDP \u5bf9\u5e94\u7528\u7a0b\u5e8f\u4ea4\u4e0b\u6765\u7684\u62a5\u6587，\u5728\u6dfb\u52a0\u9996\u90e8\u540e\u5c31\u5411\u4e0b\u4ea4\u4ed8\u7ed9 IP \u5c42，\u65e2\u4e0d\u62c6\u5206\u4e5f\u4e0d\u5408\u5e76，\u4fdd\u7559\u62a5\u6587\u8fb9\u754c \u3002\u8fd9\u8981\u6c42\u5e94\u7528\u7a0b\u5e8f\u9009\u62e9\u5408\u9002\u62a5\u6587\u5927\u5c0f \u3002<\/p>\n<\/li>\n

  • \n

    \u7b80\u5355\u548c\u9ad8\u6548：UDP\u7684\u5934\u90e8\u4fe1\u606f\u8f83\u7b80\u5355，\u4e0d\u50cfTCP\u90a3\u6837\u9700\u8981\u7ef4\u62a4\u8fde\u63a5\u72b6\u6001\u548c\u5904\u7406\u590d\u6742\u7684\u4f20\u8f93\u63a7\u5236\u3002\u8fd9\u4f7f\u5f97UDP\u5728\u4e00\u4e9b\u5bf9\u5b9e\u65f6\u6027\u548c\u6548\u7387\u8981\u6c42\u8f83\u9ad8\u7684\u5e94\u7528\u573a\u666f\u4e2d\u5177\u6709\u4f18\u52bf，\u6bd4\u5982\u97f3\u89c6\u9891\u4f20\u8f93\u3001\u5728\u7ebf\u6e38\u620f\u7b49\u3002<\/p>\n<\/li>\n

    \u4e94\u3001\u6a21\u62df\u5b9e\u73b0UDP\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u6536\u53d1\u6570\u636e<\/h2>\n

    \"\"<\/p>\n

    5.1 \u670d\u52a1\u5668udpser<\/h3>\n

    #include<stdio.h>
    \n#include<stdlib.h>
    \n#include<string.h>
    \n#include<unistd.h>
    \n#include<sys\/socket.h>
    \n#include<arpa\/inet.h>
    \n#include<netinet\/in.h><\/p>\n

    int main()
    \n{
    \n int sockfd=socket(AF_INET,SOCK_DGRAM,0);
    \n if(sockfd==-1)
    \n {
    \n exit(1);
    \n }<\/p>\n

    struct sockaddr_in saddr,caddr;
    \n memset(&saddr,0,sizeof(saddr));
    \n saddr.sin_family=AF_INET;
    \n saddr.sin_port=htons(6000);
    \n saddr.sin_addr.s_addr=inet_addr("127.0.0.1");
    \n int res=bind(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
    \n if(res==-1)
    \n {
    \n printf("bind err\\\\n");
    \n exit(1);
    \n }<\/p>\n

    while(1)
    \n {
    \n int len =sizeof(caddr);
    \n char buff[128]={0};
    \n recvfrom(sockfd,buff,127,0,(struct sockaddr*)&caddr,&len);\/\/\u63a5\u6536\u6570\u636e，\u53ef\u80fd\u4f1a\u963b\u585e
    \n printf("buff=%s\\\\n",buff);<\/p>\n

    sendto(sockfd,"ok",2,0,(struct sockaddr*)&caddr,sizeof(caddr));
    \n }
    \n}<\/p>\n

  • \n

    \u9996\u5148，\u5728main\u51fd\u6570\u4e2d\u521b\u5efa\u4e00\u4e2aUDP\u5957\u63a5\u5b57(sockfd)：\u901a\u8fc7\u8c03\u7528socket\u51fd\u6570\u521b\u5efa\u4e86\u4e00\u4e2aIPv4\u534f\u8bae\u7684\u6570\u636e\u62a5\u5957\u63a5\u5b57\u3002\u5982\u679c\u521b\u5efa\u5931\u8d25，\u5219\u7a0b\u5e8f\u9000\u51fa\u3002<\/p>\n<\/li>\n

  • \n

    \u7136\u540e，\u521d\u59cb\u5316\u670d\u52a1\u5668\u5730\u5740\u7ed3\u6784\u4f53saddr：\u8bbe\u7f6e\u5730\u5740\u65cf\u4e3aAF_INET（IPv4）\u3001\u7aef\u53e3\u53f7\u4e3a6000，\u5e76\u5c06IP\u5730\u5740\u8bbe\u7f6e\u4e3a\u672c\u5730\u56de\u73af\u5730\u5740\u201c127.0.0.1\u201d\u3002<\/p>\n<\/li>\n

  • \n

    \u8fdb\u884c\u7ed1\u5b9a：\u4f7f\u7528bind\u51fd\u6570\u5c06\u5957\u63a5\u5b57\u4e0e\u670d\u52a1\u5668\u5730\u5740\u7ed1\u5b9a\u3002\u5982\u679c\u7ed1\u5b9a\u5931\u8d25，\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f\u3002<\/p>\n<\/li>\n

  • \n

    \u8fdb\u5165\u5faa\u73af：\u7a0b\u5e8f\u8fdb\u5165\u4e00\u4e2a\u65e0\u9650\u5faa\u73af，\u7b49\u5f85\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6570\u636e\u5305\u3002<\/p>\n<\/li>\n

  • \n

    \u8c03\u7528recvfrom\u51fd\u6570\u63a5\u6536\u6570\u636e：recvfrom\u4f1a\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e\u5305，\u4e00\u65e6\u63a5\u6536\u5230\u6570\u636e\u5305，\u5c06\u6570\u636e\u5b58\u50a8\u5728buff\u6570\u7ec4\u4e2d，\u5e76\u6253\u5370\u51fa\u63a5\u6536\u5230\u7684\u6570\u636e\u5185\u5bb9\u3002<\/p>\n<\/li>\n

  • \n

    \u8c03\u7528sendto\u51fd\u6570\u53d1\u9001\u6570\u636e：sendto\u51fd\u6570\u5c06"ok"\u5b57\u7b26\u4e32\u56de\u590d\u7ed9\u5ba2\u6237\u7aef，\u56de\u590d\u7684\u76ee\u6807\u5730\u5740\u662f\u5ba2\u6237\u7aef\u7684\u5730\u5740（caddr）\u3002<\/p>\n<\/li>\n

    5.2 \u5ba2\u6237\u7aefudpcil\u00a0<\/h3>\n

    #include<stdio.h>
    \n#include<stdlib.h>
    \n#include<string.h>
    \n#include<unistd.h>
    \n#include<sys\/socket.h>
    \n#include<arpa\/inet.h>
    \n#include<netinet\/in.h><\/p>\n

    int main()
    \n{
    \n int sockfd=socket(AF_INET,SOCK_DGRAM,0);
    \n if(sockfd==-1)
    \n {
    \n exit(1);
    \n }<\/p>\n

    struct sockaddr_in saddr;\/\/\u4ee3\u8868\u670d\u52a1\u5668ip\u548c\u7aef\u53e3
    \n saddr.sin_family=AF_INET;
    \n saddr.sin_port=htons(6000);
    \n saddr.sin_addr.s_addr=inet_addr("127.0.0.1");<\/p>\n

    while(1)
    \n {
    \n printf("input:\\\\n");
    \n char buff[128]={0};
    \n fgets(buff,128,stdin);<\/p>\n

    if(strncmp(buff,"end",3)==0)
    \n {
    \n break;
    \n }<\/p>\n

    sendto(sockfd,buff,strlen(buff)-1,0,(struct sockaddr*)&saddr,sizeof(saddr));
    \n memset(buff,0, 128);
    \n int len =sizeof(saddr);
    \n recvfrom(sockfd,buff,127,0,(struct sockaddr*)&saddr,&len);
    \n printf("buff=%s\\\\n",buff);
    \n }
    \n}<\/p>\n

  • \n

    \u5728main\u51fd\u6570\u4e2d\u521b\u5efa\u4e00\u4e2aUDP\u5957\u63a5\u5b57(sockfd)：\u901a\u8fc7\u8c03\u7528socket\u51fd\u6570\u521b\u5efa\u4e86\u4e00\u4e2aIPv4\u534f\u8bae\u7684\u6570\u636e\u62a5\u5957\u63a5\u5b57\u3002\u5982\u679c\u521b\u5efa\u5931\u8d25，\u5219\u7a0b\u5e8f\u9000\u51fa\u3002<\/p>\n<\/li>\n

  • \n

    \u521d\u59cb\u5316\u670d\u52a1\u5668\u5730\u5740\u7ed3\u6784\u4f53saddr：\u8bbe\u7f6e\u5730\u5740\u65cf\u4e3aAF_INET（IPv4）\u3001\u7aef\u53e3\u53f7\u4e3a6000，\u5e76\u5c06IP\u5730\u5740\u8bbe\u7f6e\u4e3a\u672c\u5730\u56de\u73af\u5730\u5740\u201c127.0.0.1\u201d\u3002<\/p>\n<\/li>\n

  • \n

    \u8fdb\u5165\u5faa\u73af：\u7a0b\u5e8f\u8fdb\u5165\u4e00\u4e2a\u65e0\u9650\u5faa\u73af，\u6bcf\u6b21\u5faa\u73af\u90fd\u63d0\u793a\u7528\u6237\u8f93\u5165\u6d88\u606f\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u3002<\/p>\n<\/li>\n

  • \n

    \u7528\u6237\u8f93\u5165\u6d88\u606f：\u4f7f\u7528fgets\u51fd\u6570\u4ece\u6807\u51c6\u8f93\u5165(stdin)\u8bfb\u53d6\u7528\u6237\u8f93\u5165\u7684\u6d88\u606f\u5b58\u50a8\u5728buff\u6570\u7ec4\u4e2d\u3002\u5982\u679c\u7528\u6237\u8f93\u5165"end"，\u5219\u8df3\u51fa\u5faa\u73af\u3002<\/p>\n<\/li>\n

  • \n

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