我正在学习c中的套接字，我想从服务器写套接字在客户端读取它，而不是从客户机写以供服务器读取。但是我的程序卡住了。我知道套接字是二维的，但是我无法运行此代码。为什么要屏蔽此代码？我该如何解决？
我想做的概念（在while循环中）
server client
read write
write read
服务器代码
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
int main(int argc, char *argv[])
{
int listenfd = 0, connfd = 0;
struct sockaddr_in serv_addr;
char sendBuff[1025];
time_t ticks;
/* creates an UN-named socket inside the kernel and returns
* an integer known as socket descriptor
* This function takes domain/family as its first argument.
* For Internet family of IPv4 addresses we use AF_INET
*/
listenfd = socket(AF_INET, SOCK_STREAM, 0);
memset(&serv_addr, '0', sizeof(serv_addr));
memset(sendBuff, '0', sizeof(sendBuff));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(5000);
/* The call to the function "bind()" assigns the details specified
* in the structure 『serv_addr' to the socket created in the step above
*/
bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
/* The call to the function "listen()" with second argument as 10 specifies
* maximum number of client connections that server will queue for this listening
* socket.
*/
listen(listenfd, 10);
while(1)
{
/* In the call to accept(), the server is put to sleep and when for an incoming
* client request, the three way TCP handshake* is complete, the function accept()
* wakes up and returns the socket descriptor representing the client socket.
*/
connfd = accept(listenfd, (struct sockaddr*)NULL, NULL);
/* As soon as server gets a request from client, it prepares the date and time and
* writes on the client socket through the descriptor returned by accept()
*/
ticks = time(NULL);
snprintf(sendBuff, sizeof(sendBuff), "%.24s\r\n", ctime(&ticks));
write(connfd, sendBuff, strlen(sendBuff));
int n=0;
while ( (n = read(connfd, sendBuff, sizeof(sendBuff)-1)) > 0)
{
sendBuff[n] = 0;
if(fputs(sendBuff, stdout) == EOF)
{
printf("\n Error : Fputs server error\n");
}
}
close(connfd);
sleep(1);
}
}
还有我的客户代码
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <arpa/inet.h>
int main(int argc, char *argv[])
{
int sockfd = 0, n = 0;
char recvBuff[1024];
struct sockaddr_in serv_addr;
if(argc != 2)
{
printf("\n Usage: %s <ip of server> \n",argv[0]);
return 1;
}
memset(recvBuff, '0',sizeof(recvBuff));
/* a socket is created through call to socket() function */
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
printf("\n Error : Could not create socket \n");
return 1;
}
memset(&serv_addr, '0', sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(5000);
if(inet_pton(AF_INET, argv[1], &serv_addr.sin_addr)<=0)
{
printf("\n inet_pton error occured\n");
return 1;
}
/* Information like IP address of the remote host and its port is
* bundled up in a structure and a call to function connect() is made
* which tries to connect this socket with the socket (IP address and port)
* of the remote host
*/
if( connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
{
printf("\n Error : Connect Failed \n");
return 1;
}
/* Once the sockets are connected, the server sends the data (date+time)
* on clients socket through clients socket descriptor and client can read it
* through normal read call on the its socket descriptor.
*/
while ( (n = read(sockfd, recvBuff, sizeof(recvBuff)-1)) > 0)
{
recvBuff[n] = 0;
if(fputs(recvBuff, stdout) == EOF)
{
printf("\n Error : Fputs error\n");
}
}
write(sockfd, "example", strlen("example"));
if(n < 0)
{
printf("\n Read error \n");
}
return 0;
}