REDHAT 网络通讯源码

client.c

#include <sys/socket.h>
#include <netinet/in.h>
int main(int argc,char **argv)
{
 char recvbuff[100];
 int sockfd;
 struct sockaddr_in serveraddr;
 printf("start/n");
 sockfd = socket(AF_INET,SOCK_STREAM,0);
 printf("socket/n");
 bzero(&serveraddr,sizeof(serveraddr));
 serveraddr.sin_family = AF_INET;
 serveraddr.sin_port = htons(10000);
 inet_pton(AF_INET, "10.144.15.158", &serveraddr.sin_addr);
 connect(sockfd,(struct sockaddr *)&serveraddr,sizeof(serveraddr)); //if sturct is cancel,build will err
 printf("connect/n");
 recv(sockfd,recvbuff,sizeof(recvbuff),0);
 printf("%s/n",recvbuff);
 close(sockfd);
}

server.c
#include <sys/socket.h>
#include <netinet/in.h>
int main(int argc,char *argv[])
{
 int ret;
 int listensock,connsock;
    struct sockaddr_in serveraddr;
 printf("start/n");
 const char buff[] = "Hello! Welcome here!/r/n"; 
 listensock = socket(AF_INET,SOCK_STREAM,0);
 bzero(&serveraddr,sizeof(serveraddr));
 serveraddr.sin_family = AF_INET;
 serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
 serveraddr.sin_port = htons(10000);
 int on=1;
 setsockopt(listensock,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on));
 printf("bind/n");
 ret=bind(listensock,(struct sockaddr *)&serveraddr,sizeof(struct sockaddr)); //if struct is cancel,build will err.
 if(ret==-1)
 {
  printf("bind err/n");
  exit(1);
 }
 listen(listensock,1024);
 connsock = accept(listensock,(struct sockaddr *)NULL, NULL);
 printf("accept /n");
 send(connsock,buff,sizeof(buff), 0);
 ret=close(connsock);
 if(ret==-1)
 printf("colse err1 /n");
 ret=close(listensock);
 if(ret==-1)
 printf("colse err2 /n");
}