绑定：已在使用地址 [英] Bind: Address Already in Use

问题描述

我试图运行我的服务器程序，但我不断收到此错误：

上绑定错误：地址已在使用

  INT主（INT ARGC，CHAR *的argv []）{        如果（argc个6;）{
          输出（用法：stringSearcher＆LT;文件名＆GT;＆LT; stringLength＆GT;＆LT; searchLength＆GT;＆LT; nChildren＆GT;＆LT;确定nthreads＆GT;＆LT; BLOCKSIZE＆GT; \\ n）;
          出口（0）;
        }        字符*文件名=的argv [1];
        INT stringLen =的atoi（argv的[2]）;
        INT SEARCHLEN =的atoi（argv的[3]）;
        nChildren =的atoi（argv的[4]）;
        如果（nChildren == 0）
          nChildren = 1;
        INT来确定nthreads =的atoi（argv的[5]）;
        INT块大小=的atoi（argv的[6]）;
        INT childNo = 0;    //打开新的套接字
      INT的sockfd;
      的sockfd =插座（AF_INET，SOCK_STREAM，0）;      如果（的sockfd℃，）{
        PERROR（错误打开插座）;
        出口（0）;
      }  INT newsockfd，PORTNO，clilen;
  结构SOCKADDR_IN serv_addr，cli_addr;
  INT N;  PORTNO = 5000;
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = INADDR_ANY;
  serv_addr.sin_port = htons（PORTNO）;  INT选择= 1;
  setsockopt的（1，SOL_SOCKET，SO_REUSEADDR，＆安培;选择，sizeof的（OPT））;  如果（绑定（的sockfd，（结构sockaddr *）及serv_addr，sizeof的（serv_addr））小于0）{
    PERROR（绑定\\ n错误）;
   出口（1）;
  }
 

解决方案

的setsockopt（1，SOL_SOCKET，SO_REUSEADDR，＆安培;选择，sizeof的（OPT））;

第一个参数必须的sockfd，而不是1

I'm trying to run my server program but I keep getting this error:

ERROR on binding: Address already in use

  int main(int argc, char *argv[]){

        if (argc < 6){
          printf("usage: stringSearcher <filename> <stringLength>  <searchLength> <nChildren> <nThreads> <blockSize>\n");
          exit(0);
        }

        char* fileName = argv[1];
        int stringLen = atoi(argv[2]);
        int searchLen = atoi(argv[3]);
        nChildren = atoi(argv[4]);
        if (nChildren == 0)
          nChildren = 1;
        int nThreads = atoi(argv[5]);
        int blockSize = atoi(argv[6]);
        int childNo = 0;

    //Opens new socket
      int sockfd;
      sockfd = socket(AF_INET, SOCK_STREAM, 0);

      if (sockfd < 0){
        perror("ERROR opening socket");
        exit(0);
      }



  int  newsockfd, portno, clilen;
  struct sockaddr_in serv_addr, cli_addr;
  int n;

  portno = 5000;
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = INADDR_ANY;
  serv_addr.sin_port = htons(portno);

  int opt = 1;
  setsockopt(1, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));

  if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0){
    perror("ERROR on binding\n");
   exit(1);
  }

解决方案

setsockopt(1, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));

1st argument must be sockfd and not '1'

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