linux下实现服务器与客户端

来源：互联网发布：淘宝卖闲置物品编辑：程序博客网时间：2024/06/05 06:30
#include <sys/types.h>#include <sys/socket.h>#include <linux/in.h>#include <linux/un.h>#include <string.h>#include <signal.h>#include <stdio.h>#include <stdlib.h>#include <malloc.h>#include <errno.h>#include <unistd.h>#include <unistd.h>#include <signal.h>#include <sys/ioctl.h>#include <pthread.h>#include <sys/time.h>#include <sys/select.h>#include <fcntl.h>#include <unistd.h>void *modbus_server_client_thread(){        char buf[8192];          //char message[256];          int socket_descriptor;          struct sockaddr_in pin;          int port = 8000;        // char * str ="A default test string";         /* if(argc < 2)          {                  printf("we will send a default test string.\n");          }          else          {                  str = argv[1];                  if(argc == 3)                  {                          host_name = argv[2];                  }          }    */        char * host_name ="127.0.0.1";        char  *str="tcpip_client_slave";        bzero(&pin,sizeof(pin));          pin.sin_family = AF_INET;          inet_pton(AF_INET,host_name,&pin.sin_addr);          pin.sin_port = htons(port);          if((socket_descriptor =  socket(AF_INET,SOCK_STREAM,0)) == -1)          {                  perror("error opening socket \n");                  exit(1);          }          if(connect(socket_descriptor,(struct sockaddr * )&pin,sizeof(pin)) == -1)          {                  perror("error connecting to socket \n");                  exit(1);          }          printf("sending message %s to server ..\n",str);          if( write(socket_descriptor,str,strlen(str)+1) == -1 )          {                  perror("error in send \n");                  exit(1);          }          printf("..sent message ...wait for message..\n");          if( read(socket_descriptor,buf,8192) == -1 )          {                  perror("error in receiving response from server \n");                  exit(1);          }          printf("\nResponse from server:\n\n%s\n",buf);          close(socket_descriptor);          return ;  }void *modbus_server_slave_thread(){        char host_name[20];          int port = 8000;            struct sockaddr_in sin,pin;          int sock_descriptor,temp_sock_descriptor,address_size;          int i , len , on=1;          char buf[16384];          sock_descriptor = socket(AF_INET,SOCK_STREAM,0);          bzero(&sin,sizeof(sin));          sin.sin_family = AF_INET;          sin.sin_addr.s_addr = INADDR_ANY;          sin.sin_port = htons(port);          if(bind(sock_descriptor,(struct sockaddr *)&sin,sizeof(sin)) == -1)          {                  perror("call to bind");                  exit(1);          }          if(listen(sock_descriptor,100) == -1)          {                  perror("call to listem");                  exit(1);          }          printf("Accpting connections...\n");          while(1)          {                  address_size = sizeof(pin);                  temp_sock_descriptor = accept(sock_descriptor,(struct sockaddr *)&pin,&address_size);                  if(temp_sock_descriptor == -1)                  {                          perror("call to accept");                          exit(1);                  }                  if(recv(temp_sock_descriptor,buf,16384,0) == -1)                  {                          perror("call to recv");                          exit(1);                  }                  inet_ntop(AF_INET,&pin.sin_addr,host_name,sizeof(host_name));                  printf("received from client(%s):%s\n",host_name,buf);                  len = strlen(buf);                  for(i = 0 ; i  < len ; i++)                  {                          buf[i] =  toupper(buf[i]);                  }                  if(send(temp_sock_descriptor,buf,len+1,0) == -1)                  {                          perror("call to send");                          exit(1);                  }                  close(temp_sock_descriptor);          }  }void main(){  int ret;  pthread_t  modbus_client_thread,modbus_slave_thread;  pthread_create(&modbus_slave_thread,NULL,modbus_server_slave_thread,NULL);  pthread_create(&modbus_client_thread,NULL,modbus_server_client_thread,NULL);    /*等待线程结束*/   pthread_join(modbus_client_thread,NULL);//pthread_join会阻塞主线程，等待子线程结束。  pthread_join(modbus_slave_thread,NULL);  return;}
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