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小弟现在学习Socket编程。打算实现一个server.c接受客户端的连接。从客户端接收到的字符串打印出来。客户端一直接收用户的输入，并且把字符串发送到服务器端上。
但是服务器端运行到打印：“Now The server receiver client information.”这句话后一直不能显示客户端发送的字符串。
期待各位解答
server.c代码如下
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/wait.h>
#include <sys/socket.h>
#define PORT 5000 // The port which is communicate with server
#define BACKLOG 10
#define LENGTH 512 // Buffer length
int main ()
{ int sockfd; // Socket file descriptor
int nsockfd; // New Socket file descriptor
int num;
int size;
int sin_size; // to store struct size
// char sdbuf[LENGTH]; // Send buffer
char recvbuf[LENGTH];
struct sockaddr_in addr_local;
struct sockaddr_in addr_remote;
char sendstr[16]= {"123456789 abcde"};
/* Get the Socket file descriptor */
if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1 )
{
printf ("ERROR: Failed to obtain Socket Despcritor.\n");
return (0);
}
else
{
printf ("OK: Obtain Socket Despcritor sucessfully.\n");
}
/* Fill the local socket address struct */
bzero(&addr_local,sizeof(addr_local));
addr_local.sin_family = AF_INET; // Protocol Family
addr_local.sin_port = htons(PORT); // Port number
addr_local.sin_addr.s_addr = htons(INADDR_ANY); // AutoFill local address
if( bind(sockfd, (struct sockaddr*)&addr_local, sizeof(struct sockaddr)) == -1 )
{
printf ("ERROR: Failed to bind Port %d.\n",PORT);
return (0);
}
else
{
printf("OK: Bind the Port %d sucessfully.\n",PORT);
}
/* Listen remote connect/calling */
if(listen(sockfd,BACKLOG) == -1)
{
printf ("ERROR: Failed to listen Port %d.\n", PORT);
return (0);
}
else
{
printf ("OK: Listening the Port %d sucessfully.\n", PORT);
}
while(1)
{
sin_size = sizeof(struct sockaddr_in);
if ((nsockfd = accept(sockfd, (struct sockaddr *)&addr_remote, &sin_size)) == -1)
{
printf ("ERROR: Obtain new Socket Despcritor error.\n");
continue;
}
else
{
printf ("OK: Server has got connect from %s.\n", inet_ntoa(addr_remote.sin_addr));
}
printf("Now The server receiver client information.\n");
size=recv(nsockfd,recvbuf,LENGTH,0);
if(size<0)
{
printf("read socket information error from %",inet_ntoa(addr_remote.sin_addr));
}
else
printf("receiver from client informationis %s",recvbuf);
}
close(nsockfd);
} |
client.c代码如下
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#define PORT 5000 // The port which is communicate with server
#define LENGTH 256 // Buffer length
int main(int argc, char *argv[])
{
int sockfd; // Socket file descriptor
int num; // Counter of received bytes
struct sockaddr_in remote_addr; // Host address information
char sendbuf[LENGTH];
char server_addr[]="192.168.1.114";
char writebuf[LENGTH];
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
printf("ERROR: Failed to obtain Socket Descriptor!\n");
return (0);
}
/* Fill the socket address struct */
remote_addr.sin_family = AF_INET; // Protocol Family
remote_addr.sin_port = htons(PORT); // Port number
inet_pton(AF_INET, server_addr, &remote_addr.sin_addr); // Net Address
bzero(&(remote_addr.sin_zero), 8); // Flush the rest of struct
/* Try to connect the remote */
if (connect(sockfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr)) == -1)
{
printf ("ERROR: Failed to connect to the host!\n");
return (0);
}
else
{
printf ("OK: Have connected to the server\n");
}
while(1)
{
printf("Please input information to send\n");
scanf("%s",&sendbuf);
printf("your iunput information is %s. \n",sendbuf);
send(sockfd,sendbuf,LENGTH,0);
}
close (sockfd);
return (0);
}
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发表于 2008-04-29 08:08
发表于 2008-05-12 13:18