server.cpp
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main(){
int serv_sock = socket(AF_INET,SOCK_STREAM,0);
sockaddr_in serv_addr;
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
serv_addr.sin_port = htons(1234);
bind(serv_sock,(sockaddr*)&serv_addr,sizeof(serv_addr));
listen(serv_sock,20);
sockaddr_in clnt_addr;
socklen_t clnt_addr_len;
int clnt_sock = accept(serv_sock,(sockaddr*)&clnt_addr,&clnt_addr_len);
//FILE* fp = NULL;
//fp = fopen("./file","r");
//while(fgetc(fp)!=EOF);
//long file_len = ftell(fp);
//fseek(fp,0,SEEK_SET);
//char *buf = (char*)malloc(sizeof(char)*file_len);
//fread(buf,sizeof(char),file_len,fp);
//write(clnt_sock,buf,file_len);
char buf[40];
strcpy(buf,"hello world\n");
write(clnt_sock,buf,strlen(buf));
shutdown(clnt_sock,SHUT_WR);
read(clnt_sock,buf,1);
close(clnt_sock);
close(serv_sock);
//fclose(fp);
//free(buf);
return 0;
}
client.cpp
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main(){
int sock = socket(AF_INET,SOCK_STREAM,0);
sockaddr_in addr;
memset(&addr,0,sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(1234);
connect(sock,(sockaddr*)&addr,sizeof(addr));
char buf[128];
read(sock,buf,sizeof(buf));
printf("%s",buf);
//shutdown(sock,SHUT_RDWR);
close(sock);
return 0;
}