客户重连服务器的问题

haimwhite 2004-11-25 04:32:00

服务器代码,如下:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <errno.h>
#include <wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <vector.h>

#define PORT 15888
#define BUFSIZE 1024

vector<int>vfds;

int Bedaemon(void)
{
pid_t pid;
if ( (pid=fork()) < 0 )
return -1;
else if( pid !=0 )
exit(0);

printf("setsid()\n");
setsid();
return 0;
}

int GetMaxfd( vector<int>v )
{
int nRetVal = 0;
vector<int>::iterator iter;
for ( iter = v.begin(); iter != v.end(); iter++ )
if ( (*iter) >= nRetVal )
nRetVal = (*iter);
return nRetVal+1;
}

int main(int argc, char **argv)
{
int serverfd,maxfd;
fd_set readfds;
struct sockaddr_in svaddr;
struct sockaddr_in claddr;
int sin_size;
char buf[BUFSIZE]={0};

Bedaemon();

if ( ( serverfd = socket( AF_INET, SOCK_STREAM, 0 ) ) == -1 )
{
herror("socket");
exit(1);
}

svaddr.sin_family = AF_INET;
svaddr.sin_port = htons(PORT);
svaddr.sin_addr.s_addr = INADDR_ANY;
bzero(&(svaddr.sin_zero),0);

if ( bind(serverfd, (struct sockaddr*)&svaddr, sizeof(struct sockaddr)) == -1 )
{
perror("bind");
exit(1);
}

if ( listen(serverfd,20) == -1 )
{
perror("listen");
exit(1);
}

vfds.push_back( 0 ); // std in
vfds.push_back( serverfd ); // serverfd

FD_ZERO( &readfds );
FD_SET( vfds[0], &readfds );
FD_SET( vfds[1], &readfds );

struct timeval tv;
tv.tv_sec = 2;
tv.tv_usec = 500000;

vector<int>::iterator iter;
int nClientfd;
while(1)
{
maxfd = GetMaxfd( vfds );
printf("max fd is %d\n", maxfd);
if ( select(maxfd, &readfds, NULL, NULL, NULL) == -1 )
{
perror("select");
exit(1);
}

if ( FD_ISSET( serverfd, &readfds ) )
{
sin_size = sizeof(struct sockaddr_in);
if ( ( nClientfd = accept(serverfd,(struct sockaddr*)&claddr,\
(socklen_t*)&sin_size)) == -1 )
{
perror("accept");
continue;
}
vfds.push_back( nClientfd );
FD_SET( nClientfd, &readfds );
printf("Server:connected form client with addr:%s\n",\
inet_ntoa(claddr.sin_addr));
}
iter = vfds.begin();
iter = iter + 2;
for ( ; iter != vfds.end(); iter++ )
{
if ( FD_ISSET( (*iter), &readfds ) )
{
int nReadRes = read((*iter), buf, 1024 );
if ( nReadRes == -1 || nReadRes == 0 )
{
perror("read");
FD_CLR( (*iter), &readfds );
shutdown((*iter),2);
vfds.erase( iter );
iter--;
}
else
printf( "The Data is %s\n", buf );
}
}
sleep(1);
}
return 0;
}

客户端是在windows下,关闭连接的时候调用了closesocket(sockfd);
连接:
socket();
connect();
第一次连接没问题,但是closesocket之后再连就不行了,服务器在select()这里阻塞了
大侠们帮忙看一下

...全文