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我正在嘗試將客戶端連接到服務器,因此客戶端可以向服務器發送消息。 這裏是我的代碼嘗試在連接到服務器之前編譯客戶端時出錯
服務器
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <time.h>
#include <stdio.h>
#include <strings.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
int connfd, listenfd, tmp, sin_size;
struct sockaddr_in servaddr, client;
char message[100];
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = INADDR_ANY;
servaddr.sin_port = htons(13);
bzero(&servaddr, sizeof(servaddr));
listenfd = socket(AF_INET,SOCK_STREAM,0);
if(listenfd == -1)
{
printf("Error create socket\n");
exit(1);
}
tmp = bind(listenfd, (struct sockaddr*)&servaddr, sizeof(struct sockaddr));
if(tmp == -1)
{
printf("Error binding\n");
exit(1);
}
listen(listenfd,2);
sin_size = sizeof(client);
connfd = accept(listenfd, (struct sockaddr*)&client, &sin_size);
if(connfd == -1)
{
printf("Error accept\n");
exit(1);
}
bzero(&message, sizeof(message));
read(connfd, &message, sizeof(message));
write(connfd, message, sizeof(message));
close(connfd);
close(listenfd);
}
客戶
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
int main(int argc, char **argv)
{
int connfd, listenfd;
int port = atoi(argv[2]);
char message[100];
listenfd = socket(AF_INET,SOCK_STREAM,0);
if(listenfd == -1)
{
printf("Error create socket\n");
exit(1);
}
struct sockaddr_in servaddr;
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(port);
servaddr.sin_addr.s_addr = inet_addr(argv[1]);
connfd = accept(listenfd, (struct sockaddr*)&servaddr, sizeof(servaddr));
if(connfd == -1)
{
printf("Error accept\n");
exit(1);
}
bzero(&message, sizeof(message));
printf("Input kata: ");
scanf("%[^\n]",message);
getchar();
write(listenfd, &message, sizeof(message));
read(listenfd, &message, sizeof(message));
close(listenfd);
}
我編譯和運行服務器(./server 8000),它在等待客戶端連接。 當我試圖編譯有一個錯誤,該部件
connfd =接受(listenfd,(結構sockaddr *)& servaddr, 的sizeof(servaddr));
它說
warning: passing argument 3 of ‘accept’ makes pointer from integer without a cast [enabled by default]
/usr/include/x86_64-linux-gnu/sys/socket.h:214:12: note: expected ‘socklen_t * __restrict__’ but argument is of type ‘long unsigned int’
我應該怎麼做來解決它?
謝謝你的工作。但還有另一個問題。當我試圖運行./client(IP)8000時,它說錯誤接受。爲什麼它不能接受IP和端口? – greenthunder
@greenthunder,客戶端應該'connect()'而不是'accept()'。 – Rohan
是的,你是對的。但它仍然錯誤連接雖然我已經將代碼更改爲{connfd = connect(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr));}不使用綁定當然 – greenthunder