socket套接字TCP编程实例

/// -------------->client

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <unistd.h>

#define ERROR -1

#define OK    1

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

{

    int c_fd;

int len;

char buf[1024]={"tanhuifang"};

unsigned short port = 0x8888;

struct sockaddr_in s_addr;

    int sizeSockaddr = sizeof(struct sockaddr_in);

/// @brief 创建套接字

bzero(&s_addr,sizeSockaddr);

s_addr.sin_family = AF_INET;

s_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

s_addr.sin_port = htons(port);

if(-1 == (c_fd = socket(AF_INET, SOCK_STREAM, 0)) )

{

        fprintf(stdout,"socket fail\n");

return ERROR;

}

/// @brief 连接

if(-1 == connect(c_fd,(struct sockaddr *)(&s_addr),sizeSockaddr) )

{

        fprintf(stdout,"socket fail\n");

return ERROR;

}

else

{  

   fprintf(stdout,"IP:%#x\tport:%#x\n",ntohl(s_addr.sin_addr.s_addr),s_addr.sin_port);

   while(1)

   {

       if(-1 == (len = write(c_fd,buf,sizeof(buf)) ))

       {

           fprintf(stdout,"write fail\n");

return ERROR;

}

else

{

           fprintf(stdout,"send success!!!\n%d\n%s\n",len,buf);

}

sleep(2);

   }

}

 

    return OK;

}

#####################################################################

/// --------------------------->server

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <unistd.h>

#define ERROR -1

#define OK    0

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

{

    int s_fd,c_fd;

int len;

unsigned short port = 0x8888;

char buf[1024];

struct sockaddr_in s_addr,c_addr;

int sizeSockaddr = sizeof(struct sockaddr_in );

    /// @brief 创建套接字

if(-1 == (s_fd = socket(AF_INET, SOCK_STREAM, 0)) )

{

        fprintf(stdout,"socket fail !\n");

return ERROR;

}

    /// @brief 绑定

bzero(&s_addr, sizeSockaddr);

s_addr.sin_family = AF_INET;

s_addr.sin_addr.s_addr = htonl(INADDR_ANY);

s_addr.sin_port = htons(port);

if(-1 == bind(s_fd,(struct sockaddr *)(&s_addr),sizeof(struct sockaddr)))

{

        fprintf(stdout,"bind socket fail !\n");

return ERROR;

}

/// @brief 监听

if(-1 == listen(s_fd,10))

{

        fprintf(stdout,"listen socket fail !\n");

return ERROR;

}

if(-1 == (c_fd = accept(s_fd,(struct sockaddr *)(&c_addr),(socklen_t*)&sizeSockaddr)))

    {

        fprintf(stdout,"accept socket fail !\n");

return ERROR;

}

    ///fprintf(stdout,"welcom IP:%d port:%x",c_addr.sin_addr.s_addr,c_addr.sin_port)

fprintf(stdout,"welcom $$$$$\n");

while(1)

{

  memset(buf,0,1024);

       if(-1 == (len = read(c_fd,buf,1024)) )

       {

           fprintf(stdout,"read fail!!!\n");

  return ERROR;

  }

  else if(len > 0)

  {

  buf[len]='\0';

  fprintf(stdout,"I have recv:%d--%s\n",len,buf);

  }

  else

  {

           fprintf(stdout,"what happend!!!\nlen[%d]\n",len);

  }

    }

}