大家好,我正在阅读一本关于套接字编程的书,并且有两个代码客户端和服务器。
这是服务器代码
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
void error(char *msg)
{
perror(msg);
exit(1);
}
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, clilen;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n;
if (argc < 2) {
fprintf(stderr,"ERROR, no port provided/n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(sockfd < 0)
error("ERROR OPENING SOCKET");
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if(bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) <0)
error("ERROR on binding");
listen(sockfd,5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &client);
if(newsockfd < 0)
error("ERROR ON ACCEPT");
bzero(buffer,256);
n = read(newsockfd,buffer,255);
if(n < 0)
error("ERROR READING FROM SOCKET");
printf("HERE IS THE MESSAGE: %s\n",buffer);
n = write(newsockfd,"I GOT YOUR MESSAGE",18);
if(n < 0)
error("ERROR WRITING TO SOCKET");
return 0;
}
这是客户端代码
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
void error(char *msg)
{
perror(msg);
exit(1);
}
int main(int argc, char *argv[])
{
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[256];
if(argc < 3) {
fprintf(stderr,"USAGE %s hostname port\n", argv[0]);
}
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(sockfd < 0)
error("ERROR OPENING SOCKET");
server = gethostbyname(argv[1]);
if(server == NULL) {
fprintf(stderr,"ERROR no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length);
serv_addr.sin_port = htons(portno);
if(connect(sockfd,&serv_addr,sizeof(serv_addr)) < 0)
error("ERROR CONECTING");
printf("Please Enter the message: ");
bzero(buffer,256);
fgets(buffer,255,stdin);
n = write(sockfd,buffer,strlen(buffer));
if(n < 0)
error("ERROR READING THE SOCKET");
printf("%s\n",buffer);
return 0;
}
但是当我用visual studio或turbo c ++或borland c ++编译它时,他们给了我错误我已经下载了所有必需的头文件,但问题仍然存在。