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－－－－－－－－－－－－－－－－－－－－－－－－－－－－－server.c－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <netdb.h>
#include <pthread.h>
#include <openssl/md5.h>
#include <sys/select.h>
#include <string.h>
#define MAX 512
int sock_listen(void)
{
char *string="server return ok";
socklen_t clt_addr_len;
int listen_fd;
int com_fd;
int ret;
int i,num;
static char recv_buf[1024];
int len;
int port;
pid_t pid;
struct sockaddr_in clt_addr;
struct sockaddr_in srv_addr;
struct timeval wait_time;
fd_set read_fds;
port=5050;
listen_fd=socket(PF_INET,SOCK_STREAM,0);
if(listen_fd<0){
perror("cannot create listening socket");
return 1;
}
memset(&srv_addr,0,sizeof(srv_addr));
srv_addr.sin_family=AF_INET;
srv_addr.sin_addr.s_addr=htonl(INADDR_ANY);
srv_addr.sin_port=htons(port);
ret=bind(listen_fd,(struct sockaddr*)&srv_addr,sizeof(srv_addr));
if(ret==-1){
perror("cannot bind server socket");
close(listen_fd);
return 1;
}
ret=listen(listen_fd,5);
if(ret==-1){
perror("cannot listen the client connect request");
close(listen_fd);
return 1;
}
while(1){
wait_time.tv_sec=3;
wait_time.tv_usec=0;
FD_ZERO(&read_fds);
FD_SET(listen_fd,&read_fds);
num=select(listen_fd+1,&read_fds,NULL,NULL,&wait_time);
if(num<0)
{
perror("select error");
continue;
}
if(FD_ISSET(listen_fd,&read_fds)){
len=sizeof(clt_addr);
com_fd=accept(listen_fd,(struct sockaddr*)&clt_addr,&len);
if(com_fd<0){
if(errno==EINTR){
continue;
}else{
perror("cannot accept client connect request");
close(listen_fd);
return 1;
}
}
len=read(com_fd,recv_buf,1024);
printf("Message client(%d): %s\n",len,recv_buf);
// write(com_fd,string,strlen(string));
}
}
return 0;
}
int main(int argc,char **argv)
{
sock_listen();
}
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－client－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
客户端：
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <netdb.h>
#include <pthread.h>
#include <openssl/md5.h>
#include <sys/select.h>
#include <string.h>
#define MAX 512
int act_sock(void)
{
int sockfd;
char *str="i'm local server";
int len;
struct sockaddr_in address;
int result;
char ch[100];
while(1){
sockfd = socket(AF_INET, SOCK_STREAM, 0);
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr("127.0.0.1");
address.sin_port = htons(5050);
len = sizeof(address);
result = connect(sockfd, (struct sockaddr *)&address, len);
if(result == -1){
perror("oops: client1");
sleep(1);
close(sockfd);
}
write(sockfd,str,strlen(str));
// read(sockfd,ch,99);
printf("%s\n",ch);
sleep(2);
close(sockfd);
}
}
int main(int argc,char **argv)
{
act_sock();
}
我在上一对一可以正常通讯，如果加多几客户端端，就会出现
cannot accept client connect request: Too many open files
不能实现一对多通讯，第一次写一对多，望各位大侠帮帮 |
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发表于 2008-11-21 13:12
