{"id":15164,"date":"2025-04-18T21:49:01","date_gmt":"2025-04-18T13:49:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/15164.html"},"modified":"2025-04-18T21:49:01","modified_gmt":"2025-04-18T13:49:01","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3socket%e7%bc%96%e7%a8%8b%ef%bc%9a%e6%9e%84%e5%bb%ba%e7%ae%80%e5%8d%95%e7%9a%84%e8%ae%a1%e7%ae%97%e5%99%a8%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/15164.html","title":{"rendered":"\u6df1\u5165\u7406\u89e3Socket\u7f16\u7a0b\uff1a\u6784\u5efa\u7b80\u5355\u7684\u8ba1\u7b97\u5668\u670d\u52a1\u5668"},"content":{"rendered":"

\u4e00\u3001Socket\u901a\u4fe1\u57fa\u7840<\/p>\n

1. Socket\u901a\u4fe1\u57fa\u672c\u6d41\u7a0b<\/h4>\n

\u670d\u52a1\u5668\u7aef\u6d41\u7a0b：<\/h5>\n
  • \n

    \u521b\u5efaSocket (socket())<\/p>\n<\/li>\n

  • \n

    \u7ed1\u5b9a\u5730\u5740\u548c\u7aef\u53e3 (bind())<\/p>\n<\/li>\n

  • \n

    \u76d1\u542c\u8fde\u63a5 (listen())<\/p>\n<\/li>\n

  • \n

    \u63a5\u53d7\u8fde\u63a5 (accept())<\/p>\n<\/li>\n

  • \n

    \u6570\u636e\u901a\u4fe1 (read()\/write())<\/p>\n<\/li>\n

  • \n

    \u5173\u95ed\u8fde\u63a5 (close())<\/p>\n<\/li>\n

    \u5ba2\u6237\u7aef\u6d41\u7a0b：<\/h5>\n
  • \n

    \u521b\u5efaSocket (socket())<\/p>\n<\/li>\n

  • \n

    \u8fde\u63a5\u670d\u52a1\u5668 (connect())<\/p>\n<\/li>\n

  • \n

    \u6570\u636e\u901a\u4fe1 (read()\/write())<\/p>\n<\/li>\n

  • \n

    \u5173\u95ed\u8fde\u63a5 (close())<\/p>\n<\/li>\n

    2. \u5173\u952e\u6570\u636e\u7ed3\u6784<\/h4>\n

    struct sockaddr_in \u7528\u4e8e\u5b58\u50a8IPv4\u5730\u5740\u4fe1\u606f：<\/p>\n<\/p>\n

    struct sockaddr_in {
    \n short sin_family; \/\/ \u5730\u5740\u65cf，\u5982AF_INET
    \n unsigned short sin_port; \/\/ \u7aef\u53e3\u53f7
    \n struct in_addr sin_addr; \/\/ IP\u5730\u5740
    \n char sin_zero[8]; \/\/ \u586b\u5145\u5b57\u6bb5
    \n};<\/p>\n

    struct in_addr {
    \n unsigned long s_addr; \/\/ 32\u4f4dIPv4\u5730\u5740
    \n}; <\/p>\n

    \u4e8c\u3001\u670d\u52a1\u5668\u4ee3\u7801\u8be6\u89e3<\/h3>\n

    1. \u5934\u6587\u4ef6\u5f15\u5165<\/h4>\n<\/p>\n

    #include <stdio.h> \/\/ \u6807\u51c6\u8f93\u5165\u8f93\u51fa
    \n#include <stdlib.h> \/\/ \u6807\u51c6\u5e93\u51fd\u6570
    \n#include <string.h> \/\/ \u5b57\u7b26\u4e32\u5904\u7406
    \n#include <unistd.h> \/\/ POSIX\u7cfb\u7edf\u8c03\u7528
    \n#include <sys\/types.h> \/\/ \u7cfb\u7edf\u6570\u636e\u7c7b\u578b
    \n#include <sys\/socket.h> \/\/ Socket\u76f8\u5173\u51fd\u6570
    \n#include <netinet\/in.h> \/\/ Internet\u5730\u5740\u65cf <\/p>\n

    \u8fd9\u4e9b\u5934\u6587\u4ef6\u63d0\u4f9b\u4e86Socket\u7f16\u7a0b\u6240\u9700\u7684\u57fa\u672c\u529f\u80fd\u3002<\/p>\n

    2. \u9519\u8bef\u5904\u7406\u51fd\u6570<\/h4>\n<\/p>\n

    void error(const char *msg) {
    \n perror(msg); \/\/ \u6253\u5370\u9519\u8bef\u4fe1\u606f
    \n exit(1); \/\/ \u5f02\u5e38\u9000\u51fa
    \n} <\/p>\n

    perror()\u4f1a\u6839\u636e\u5168\u5c40\u53d8\u91cferrno\u6253\u5370\u63cf\u8ff0\u6027\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n

    3. \u4e3b\u51fd\u6570\u7ed3\u6784<\/h4>\n<\/p>\n

    int main(int argc, char *argv[]) {
    \n if(argc < 2) {
    \n fprintf(stderr,"Port no not provided, Program terminated");
    \n exit(1);
    \n }
    \n \/\/ … \u5176\u4f59\u4ee3\u7801
    \n} <\/p>\n

    \u68c0\u67e5\u547d\u4ee4\u884c\u53c2\u6570，\u786e\u4fdd\u63d0\u4f9b\u4e86\u7aef\u53e3\u53f7\u3002<\/p>\n

    4. \u53d8\u91cf\u58f0\u660e<\/h4>\n<\/p>\n

    int sockfd, newsockfd, portno;
    \nchar buffer[255];
    \nstruct sockaddr_in serv_addr, cli_addr;
    \nsocklen_t clilen; <\/p>\n

      \n
    • \n

      sockfd: \u76d1\u542cSocket\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n<\/li>\n

    • \n

      newsockfd: \u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7684Socket\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n<\/li>\n

    • \n

      serv_addr\/cli_addr: \u670d\u52a1\u5668\/\u5ba2\u6237\u7aef\u5730\u5740\u4fe1\u606f<\/p>\n<\/li>\n

    • \n

      clilen: \u5ba2\u6237\u7aef\u5730\u5740\u7ed3\u6784\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n

      5. \u521b\u5efaSocket<\/h4>\n<\/p>\n

      sockfd = socket(AF_INET, SOCK_STREAM, 0);
      \nif(sockfd < 0) {
      \n error("Error opening Socket.");
      \n} <\/p>\n

      socket()\u51fd\u6570\u53c2\u6570：<\/p>\n

        \n
      • \n

        AF_INET: IPv4\u5730\u5740\u65cf<\/p>\n<\/li>\n

      • \n

        SOCK_STREAM: \u9762\u5411\u8fde\u63a5\u7684TCP Socket<\/p>\n<\/li>\n

      • \n

        0: \u9ed8\u8ba4\u534f\u8bae(TCP)<\/p>\n<\/li>\n<\/ul>\n

        6. \u521d\u59cb\u5316\u670d\u52a1\u5668\u5730\u5740<\/h4>\n<\/p>\n

        bzero((char *)&serv_addr, sizeof(serv_addr));
        \nportno = atoi(argv[1]);<\/p>\n

        serv_addr.sin_family = AF_INET;
        \nserv_addr.sin_addr.s_addr = INADDR_ANY;
        \nserv_addr.sin_port = htons(portno); <\/p>\n

          \n
        • \n

          bzero(): \u6e05\u96f6\u5185\u5b58\u533a\u57df<\/p>\n<\/li>\n

        • \n

          INADDR_ANY: \u76d1\u542c\u6240\u6709\u7f51\u7edc\u63a5\u53e3<\/p>\n<\/li>\n

        • \n

          htons(): \u5c06\u7aef\u53e3\u53f7\u8f6c\u6362\u4e3a\u7f51\u7edc\u5b57\u8282\u5e8f(\u5927\u7aef)<\/p>\n<\/li>\n<\/ul>\n

          7. \u7ed1\u5b9aSocket<\/h4>\n<\/p>\n

          if(bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
          \n error("Binding Failed."); <\/p>\n

          bind()\u5c06Socket\u4e0e\u5730\u5740\u548c\u7aef\u53e3\u7ed1\u5b9a\u3002<\/p>\n

          8. \u76d1\u542c\u8fde\u63a5<\/h4>\n<\/p>\n

          listen(sockfd,5); <\/p>\n

          listen()\u5f00\u59cb\u76d1\u542c\u8fde\u63a5，\u53c2\u65705\u6307\u5b9a\u7b49\u5f85\u8fde\u63a5\u961f\u5217\u7684\u6700\u5927\u957f\u5ea6\u3002<\/p>\n

          9. \u63a5\u53d7\u8fde\u63a5<\/h4>\n<\/p>\n

          newsockfd = accept(sockfd, (struct sockaddr*)&cli_addr,&clilen);
          \nif(newsockfd < 0)
          \n error("Error on Accept"); <\/p>\n

          accept()\u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5，\u8fd4\u56de\u65b0\u7684Socket\u6587\u4ef6\u63cf\u8ff0\u7b26\u7528\u4e8e\u901a\u4fe1\u3002<\/p>\n

          10. \u8ba1\u7b97\u5668\u4e1a\u52a1\u903b\u8f91<\/h4>\n<\/p>\n

          int num1, num2, ans, choice,n;
          \nS: n = write(newsockfd,"Enter Number 1 : ",strlen("Enter Number 1"));
          \nif (n < 0) error("Error writing to socket");
          \nread(newsockfd, &num1, sizeof(int));
          \nprintf("Client – Number 1 is : %d \\\\n",num1);<\/p>\n

          \/\/ … \u7c7b\u4f3c\u5904\u7406num2\u548cchoice<\/p>\n

          switch (choice) {
          \ncase 1:
          \n ans = num1 + num2;
          \n break;
          \ncase 2:
          \n ans = num1 – num2;
          \n break;
          \ncase 3:
          \n ans = num1 * num2;
          \n break;
          \ncase 4:
          \n ans = num1 \/ num2;
          \n break;
          \ncase 5:
          \n goto Q;
          \n break;
          \n}<\/p>\n

          write(newsockfd,&ans,sizeof(int));
          \nif(choice != 5)
          \n goto S; <\/p>\n

          \u8fd9\u91cc\u5b9e\u73b0\u4e86\u7b80\u5355\u7684\u8ba1\u7b97\u5668\u529f\u80fd，\u4f7f\u7528goto\u5b9e\u73b0\u5faa\u73af\u903b\u8f91\u3002<\/p>\n

          11. \u5173\u95ed\u8fde\u63a5<\/h4>\n<\/p>\n

          Q:
          \nclose(newsockfd);
          \nclose(sockfd);
          \nreturn 0; <\/p>\n

          \u4e09\u3001\u5173\u952e\u51fd\u6570\u6df1\u5ea6\u89e3\u6790<\/h3>\n

          1. socket()<\/h4>\n<\/p>\n

          int socket(int domain, int type, int protocol); <\/p>\n

            \n
          • \n

            \u529f\u80fd：\u521b\u5efa\u901a\u4fe1\u7aef\u70b9<\/p>\n<\/li>\n

          • \n

            \u53c2\u6570：<\/p>\n

              \n
            • \n

              domain: \u901a\u4fe1\u57df(AF_INET, AF_INET6\u7b49)<\/p>\n<\/li>\n

            • \n

              type: \u901a\u4fe1\u8bed\u4e49(SOCK_STREAM, SOCK_DGRAM\u7b49)<\/p>\n<\/li>\n

            • \n

              protocol: \u901a\u5e38\u4e3a0，\u8868\u793a\u9ed8\u8ba4\u534f\u8bae<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

            • \n

              \u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5931\u8d25\u8fd4\u56de-1<\/p>\n<\/li>\n<\/ul>\n

              2. bind()<\/h4>\n<\/p>\n

              int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen); <\/p>\n

                \n
              • \n

                \u529f\u80fd：\u5c06Socket\u4e0e\u5730\u5740\u7ed1\u5b9a<\/p>\n<\/li>\n

              • \n

                \u53c2\u6570：<\/p>\n

                  \n
                • \n

                  sockfd: Socket\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n<\/li>\n

                • \n

                  addr: \u6307\u5411\u5730\u5740\u7ed3\u6784\u7684\u6307\u9488<\/p>\n<\/li>\n

                • \n

                  addrlen: \u5730\u5740\u7ed3\u6784\u5927\u5c0f<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

                • \n

                  \u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de0，\u5931\u8d25\u8fd4\u56de-1<\/p>\n<\/li>\n<\/ul>\n

                  3. listen()<\/h4>\n<\/p>\n

                  int listen(int sockfd, int backlog); <\/p>\n

                    \n
                  • \n

                    \u529f\u80fd：\u5f00\u59cb\u76d1\u542c\u8fde\u63a5\u8bf7\u6c42<\/p>\n<\/li>\n

                  • \n

                    \u53c2\u6570：<\/p>\n

                      \n
                    • \n

                      sockfd: Socket\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n<\/li>\n

                    • \n

                      backlog: \u7b49\u5f85\u8fde\u63a5\u961f\u5217\u7684\u6700\u5927\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

                    • \n

                      \u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de0，\u5931\u8d25\u8fd4\u56de-1<\/p>\n<\/li>\n<\/ul>\n

                      4. accept()<\/h4>\n<\/p>\n

                      int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen); <\/p>\n

                        \n
                      • \n

                        \u529f\u80fd：\u63a5\u53d7\u8fde\u63a5\u8bf7\u6c42<\/p>\n<\/li>\n

                      • \n

                        \u53c2\u6570：<\/p>\n

                          \n
                        • \n

                          addr: \u7528\u4e8e\u5b58\u50a8\u5ba2\u6237\u7aef\u5730\u5740<\/p>\n<\/li>\n

                        • \n

                          addrlen: \u5730\u5740\u7ed3\u6784\u5927\u5c0f<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

                        • \n

                          \u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de\u65b0\u7684Socket\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5931\u8d25\u8fd4\u56de-1<\/p>\n<\/li>\n<\/ul>\n

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

                          void error(const char *msg)
                          \n{
                          \n perror(msg);
                          \n exit(1);
                          \n}
                          \nint main(int argc, char *argv[])
                          \n{
                          \n if(argc < 2)
                          \n {
                          \n fprintf(stderr,"Port no not provided, Program terminated");
                          \n exit(1);
                          \n }<\/p>\n

                          int sockfd, newsockfd, portno;
                          \n char buffer[255];<\/p>\n

                          struct sockaddr_in serv_addr, cli_addr;
                          \n socklen_t clilen;<\/p>\n

                          sockfd = socket(AF_INET, SOCK_STREAM, 0);
                          \n if(sockfd < 0)
                          \n {
                          \n error ("Error opening Socket.");
                          \n }<\/p>\n

                          bzero((char *)&serv_addr, sizeof(serv_addr));
                          \n portno = atoi(argv[1]);<\/p>\n

                          serv_addr.sin_family = AF_INET;
                          \n serv_addr.sin_addr.s_addr = INADDR_ANY;
                          \n serv_addr.sin_port = htons(portno);<\/p>\n

                          if(bind(sockfd , (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
                          \n error("Binding Failed.");<\/p>\n

                          listen(sockfd,5);
                          \n clilen = sizeof(cli_addr);<\/p>\n

                          newsockfd = accept(sockfd, (struct sockaddr*)&cli_addr,&clilen);<\/p>\n

                          if(newsockfd < 0)
                          \n error("Error on Accept");<\/p>\n

                          int num1, num2, ans, choice,n;
                          \n S: n = write(newsockfd,"Enter Number 1 : ",strlen("Enter Number 1"));
                          \n if (n < 0) error("Error writing to socket");
                          \n read(newsockfd, &num1, sizeof(int));
                          \n printf("Client – Number 1 is : %d \\\\n",num1);<\/p>\n

                          n = write(newsockfd,"Enter Number 2 : ",strlen("Enter Number 2"));
                          \n if (n < 0) error("Error writing to socket");
                          \n read(newsockfd, &num2, sizeof(int));
                          \n printf("Client – Number 2 is : %d \\\\n",num2);<\/p>\n

                          n = write(newsockfd,"Enter your choice: \\\\n1.Addition\\\\n2.subtraction\\\\n3.Multiplication\\\\n4.Division\\\\n5.Exit\\\\n",strlen("Enter your choice: \\\\n1.Addition\\\\n2.subtraction\\\\n3.Multiplication\\\\n4.Division\\\\n5.Exit\\\\n"));
                          \n if(n < 0) error("ERROR writing to socket");
                          \n read(newsockfd, &choice, sizeof(int));
                          \n printf("Client – choice is :%d\\\\n",choice);<\/p>\n

                          switch (choice)
                          \n {
                          \n case 1:
                          \n ans = num1 + num2;
                          \n break;<\/p>\n

                          case 2:
                          \n ans = num1 – num2;
                          \n break;<\/p>\n

                          case 3:
                          \n ans = num1 * num2;
                          \n break;<\/p>\n

                          case 4:
                          \n ans = num1 \/ num2;
                          \n break;<\/p>\n

                          case 5:
                          \n goto Q;
                          \n break;<\/p>\n

                          }<\/p>\n

                          write(newsockfd,&ans,sizeof(int));
                          \n if(choice != 5)
                          \n goto S;<\/p>\n

                          Q:
                          \n close(newsockfd);
                          \n close(sockfd);
                          \n return 0;<\/p>\n

                          }
                          \n\/*
                          \nfilename server_ipaddress portno<\/p>\n

                          argc[0] filename
                          \nargv[1] serve_ipaddress
                          \nargv[2] portno
                          \n*\/<\/p>\n

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

                          void error(const char *msg)
                          \n{
                          \n perror(msg);
                          \n exit(0);
                          \n}
                          \nint main(int argc, char *argv[])
                          \n{
                          \n int sockfd, portno, n;
                          \n char buffer[256];<\/p>\n

                          struct sockaddr_in serv_addr;
                          \n struct hostent *server;
                          \n if (argc < 3)
                          \n {
                          \n fprintf(stderr, "usage %s hostname port\\\\n", argv[0]);
                          \n exit(1);
                          \n }<\/p>\n

                          portno = atoi(argv[2]);
                          \n sockfd = socket(AF_INET, SOCK_STREAM, 0);
                          \n if(sockfd < 0)
                          \n {
                          \n error ("Error opening Socket.");
                          \n }<\/p>\n

                          server = gethostbyname(argv[1]);
                          \n if(server == NULL)
                          \n {
                          \n fprintf(stderr, "Error,no such host");
                          \n }<\/p>\n

                          bzero((char *)&serv_addr, sizeof(serv_addr));
                          \n serv_addr.sin_family = AF_INET;
                          \n bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length);
                          \n serv_addr.sin_port = htons(portno);
                          \n if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
                          \n {
                          \n error("Connection Failed");
                          \n }<\/p>\n

                          int num1, num2, choice, ans;
                          \n S:
                          \n bzero(buffer,256);
                          \n n = read (sockfd, buffer, 255);
                          \n if( n < 0 )
                          \n error("ERROR reading from socket");
                          \n printf("Server – %s\\\\n",buffer);
                          \n scanf("%d",&num1);
                          \n write(sockfd, &num1,sizeof(int));<\/p>\n

                          bzero(buffer,256);
                          \n n = read (sockfd, buffer, 255);
                          \n if( n < 0 )
                          \n error("ERROR reading from socket");
                          \n printf("Server – %s\\\\n",buffer);
                          \n scanf("%d",&num2);
                          \n write(sockfd, &num2,sizeof(int));<\/p>\n

                          bzero(buffer,256);
                          \n n = read (sockfd, buffer, 255);
                          \n if( n < 0 )
                          \n error("ERROR reading from socket");
                          \n printf("Server – %s\\\\n",buffer);
                          \n scanf("%d",&choice);
                          \n write(sockfd, &choice,sizeof(int));<\/p>\n

                          if (choice == 5)
                          \n goto Q;<\/p>\n

                          read(sockfd, &ans ,sizeof(int));
                          \n printf("Server- The answer is :%d\\\\n",ans);<\/p>\n

                          if(choice !=5)
                          \n goto S;<\/p>\n

                          Q:
                          \n printf("You have selected to exit.Exit Successful");
                          \n close(sockfd);
                          \n return 0;<\/p>\n

                          } <\/p>\n

                          \"\"<\/p>\n

                          \u4e00\u3001\u51fd\u6570\u53c2\u6570\u8bb0\u5fc6\u6846\u67b6（TCP Socket\u7248）<\/h4>\n

                          1. \u6838\u5fc3\u601d\u7ef4："3W1H"\u6a21\u578b<\/h5>\n
                            \n
                          • \n

                            Where (\u5730\u5740\u76f8\u5173)：sockaddr_in, addrlen<\/p>\n<\/li>\n

                          • \n

                            What (\u6570\u636e\u76f8\u5173)：buffer, strlen<\/p>\n<\/li>\n

                          • \n

                            Which (\u6807\u8bc6\u7b26)：sockfd, newsockfd<\/p>\n<\/li>\n

                          • \n

                            How (\u65b9\u5f0f)：flags (\u901a\u5e38\u586b0)<\/p>\n<\/li>\n<\/ul>\n

                            2. \u51fd\u6570\u53c2\u6570\u901f\u8bb0\u8868<\/h5>\n\n\u51fd\u6570\u53c2\u6570\u987a\u5e8f\u52a9\u8bb0\u53e3\u8bc0\u5fc5\u987b\u8bb0\u4f4f\u7684\u53c2\u6570<\/tr>\n\n\n\n\n\n\n\n
                            socket()<\/td>\n"\u5bb6-\u95e8-\u94a5\u5319"<\/td>\nAF_INET, SOCK_STREAM, 0<\/td>\n<\/tr>\n
                            bind()<\/td>\n"\u95e8\u724c-\u5730\u5740\u672c-\u5730\u5740\u957f\u5ea6"<\/td>\nsockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)<\/td>\n<\/tr>\n
                            listen()<\/td>\n"\u95e8\u724c-\u5019\u5ba2\u5ba4\u5927\u5c0f"<\/td>\nsockfd, 5 (backlog)<\/td>\n<\/tr>\n
                            accept()<\/td>\n"\u95e8\u724c-\u5ba2\u6237\u767b\u8bb0\u8868-\u8868\u957f\u5ea6"<\/td>\nsockfd, cli_addr, &clilen<\/td>\n<\/tr>\n
                            connect()<\/td>\n"\u95e8\u724c-\u76ee\u7684\u5730\u5730\u5740-\u5730\u5740\u957f\u5ea6"<\/td>\nsockfd, serv_addr, sizeof(serv_addr)<\/td>\n<\/tr>\n
                            read()\/write()<\/td>\n"\u4fe1\u7bb1-\u7eb8\u6761-\u7eb8\u6761\u5927\u5c0f"<\/td>\nnewsockfd, buffer, sizeof(buffer)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                            \u4e8c\u3001\u53c2\u6570\u5206\u7c7b\u8bb0\u5fc6\u6cd5<\/h4>\n

                            1. \u5730\u5740\u5bb6\u65cf\u4e09\u4ef6\u5957<\/h5>\n<\/p>\n

                            serv_addr.sin_family = AF_INET; \/\/ IPv4
                            \nserv_addr.sin_addr.s_addr = INADDR_ANY; \/\/ \u6240\u6709IP
                            \nserv_addr.sin_port = htons(portno); \/\/ \u7aef\u53e3\u8f6c\u6362 <\/p>\n

                              \n
                            • \n

                              \u8bb0\u5fc6\u53e3\u8bc0："\u5bb6-\u95e8-\u65b9\u5411\u724c"（family-address-port）<\/p>\n<\/li>\n<\/ul>\n

                              2. \u7c7b\u578b\u8f6c\u6362\u56db\u91cd\u594f<\/h5>\n<\/p>\n

                              \/\/ \u6307\u9488\u8f6c\u6362
                              \n(struct sockaddr*)&serv_addr<\/p>\n

                              \/\/ \u5b57\u8282\u5e8f\u8f6c\u6362
                              \nhtons() \/\/ host to network short
                              \nhtonl() \/\/ host to network long
                              \nntohs() \/\/ network to host short
                              \nntohl() \/\/ network to host long <\/p>\n

                                \n
                              • \n

                                \u8bb0\u5fc6\u6280\u5de7："h\u2192n\u662f\u51fa\u95e8，n\u2192h\u662f\u56de\u5bb6"<\/p>\n<\/li>\n<\/ul>\n

                                \u4e09\u3001\u5b9e\u6218\u586b\u53c2\u6a21\u677f<\/h4>\n

                                1. \u670d\u52a1\u7aef\u6807\u51c6\u6d41\u7a0b<\/h5>\n<\/p>\n

                                \/\/ 1. \u521b\u5efasocket（\u4e09\u56fa\u5b9a\u53c2\u6570）
                                \nint sockfd = socket(AF_INET, SOCK_STREAM, 0);<\/p>\n

                                \/\/ 2. \u7ed1\u5b9a\u5730\u5740（\u7ed3\u6784\u4f53\u5f3a\u5236\u8f6c\u6362）
                                \nbind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr));<\/p>\n

                                \/\/ 3. \u63a5\u53d7\u8fde\u63a5（\u6ce8\u610f&clilen）
                                \naccept(sockfd, (struct sockaddr*)&cli_addr, &clilen); <\/p>\n

                                2. \u5ba2\u6237\u7aef\u8fde\u63a5\u6a21\u677f<\/h5>\n<\/p>\n

                                connect(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)); <\/p>\n

                                \u56db\u3001\u5e38\u89c1\u53c2\u6570\u586b\u9519\u573a\u666f<\/h4>\n\n\u9519\u8bef\u573a\u666f\u6b63\u786e\u5199\u6cd5\u8bb0\u5fc6\u8981\u70b9<\/tr>\n\n\n\n\n\n
                                \u5fd8\u8bb0\u5730\u5740\u7ed3\u6784\u4f53\u8f6c\u6362<\/td>\n(struct sockaddr*)&serv_addr<\/td>\n"\u5957\u5916\u5957"\u6cd5\u5219<\/td>\n<\/tr>\n
                                \u4f20\u503c vs \u4f20\u5730\u5740\u6df7\u6dc6<\/td>\n&clilen \u800c\u4e0d\u662f clilen<\/td>\naccept()\u8981\u4fee\u6539\u957f\u5ea6\u503c<\/td>\n<\/tr>\n
                                \u5b57\u8282\u5e8f\u672a\u8f6c\u6362<\/td>\nhtons(portno)<\/td>\n\u6240\u6709\u7f51\u7edc\u4f20\u8f93\u7684\u6570\u636e\u90fd\u8981\u8f6c\u6362<\/td>\n<\/tr>\n
                                buffer\u5927\u5c0f\u8ba1\u7b97\u9519\u8bef<\/td>\nread(fd, buf, sizeof(buf))<\/td>\n\u7528sizeof\u800c\u4e0d\u662fstrlen<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                \u4e94\u3001\u8c03\u8bd5\u6280\u5de7<\/h4>\n
                              • \n

                                \u53c2\u6570\u68c0\u67e5\u6e05\u5355：<\/p>\n

                                  \n
                                • \n

                                  \u6240\u6709\u7f51\u7edc\u5b57\u8282\u5e8f\u8f6c\u6362\u4e86\u5417？<\/p>\n<\/li>\n

                                • \n

                                  \u5730\u5740\u7ed3\u6784\u4f53\u8f6c\u6362\u4e86\u5417？<\/p>\n<\/li>\n

                                • \n

                                  \u957f\u5ea6\u53c2\u6570\u4f20\u5730\u5740\u4e86\u5417？<\/p>\n<\/li>\n

                                • \n

                                  \u9519\u8bef\u5904\u7406\u90fd\u5199\u4e86\u5417？<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

                                • \n

                                  GDB\u8c03\u8bd5\u547d\u4ee4：<\/p>\n

                                  \u00a0 (gdb) p serv_addr # \u67e5\u770b\u5730\u5740\u7ed3\u6784\u4f53
                                  \n(gdb) p &serv_addr # \u786e\u8ba4\u6307\u9488\u7c7b\u578b <\/li>\n

                                  \u516d\u3001\u7c7b\u6bd4\u8bb0\u5fc6\u6cd5<\/h4>\n\n\u51fd\u6570\u73b0\u5b9e\u7c7b\u6bd4\u5173\u952e\u53c2\u6570\u5bf9\u5e94\u5173\u7cfb<\/tr>\n\n\n\n\n\n\n
                                  socket()<\/td>\n\u4e70\u624b\u673a<\/td>\n\u624b\u673a\u7c7b\u578b=AF_INET<\/td>\n<\/tr>\n
                                  bind()<\/td>\n\u529e\u624b\u673a\u5361<\/td>\n\u7535\u8bdd\u53f7\u7801=portno<\/td>\n<\/tr>\n
                                  listen()<\/td>\n\u5f00\u673a<\/td>\n\u6700\u5927\u672a\u63a5\u6765\u7535=backlog<\/td>\n<\/tr>\n
                                  accept()<\/td>\n\u63a5\u542c\u6765\u7535<\/td>\n\u6765\u7535\u663e\u793a=cli_addr<\/td>\n<\/tr>\n
                                  connect()<\/td>\n\u62e8\u6253\u7535\u8bdd<\/td>\n\u5bf9\u65b9\u53f7\u7801=serv_addr<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                  \u4e03\u3001\u8fdb\u9636\u8bb0\u5fc6\u6cd5（\u534f\u8bae\u6808\u5c42\u6b21）<\/h4>\n<\/p>\n

                                  \u5e94\u7528\u5c42：buffer\u6570\u636e
                                  \n\u4f20\u8f93\u5c42：SOCK_STREAM\/SOCK_DGRAM
                                  \n\u7f51\u7edc\u5c42：AF_INET\/AF_INET6
                                  \n\u94fe\u8def\u5c42：\u7cfb\u7edf\u81ea\u52a8\u5904\u7406 <\/p>\n

                                  \u8bb0\u4f4f：\u4ece\u4e0a\u5230\u4e0b\u8d8a\u6765\u8d8a\u5e95\u5c42，\u4ece\u4e0b\u5230\u4e0a\u8d8a\u6765\u8d8a\u62bd\u8c61<\/p>\n","protected":false},"excerpt":{"rendered":"

                                  \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1k\u6b21\uff0c\u70b9\u8d5e28\u6b21\uff0c\u6536\u85cf27\u6b21\u3002\u4e00\u3001Socket\u901a\u4fe1\u57fa\u7840\u3002<\/p>\n","protected":false},"author":2,"featured_media":15163,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[78],"topic":[],"class_list":["post-15164","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-78"],"yoast_head":"\n\u6df1\u5165\u7406\u89e3Socket\u7f16\u7a0b\uff1a\u6784\u5efa\u7b80\u5355\u7684\u8ba1\u7b97\u5668\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/15164.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6df1\u5165\u7406\u89e3Socket\u7f16\u7a0b\uff1a\u6784\u5efa\u7b80\u5355\u7684\u8ba1\u7b97\u5668\u670d\u52a1\u5668 - 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