然后在main函数中就直接在这个套接字描述符上accept。这样有什么问题吗？为什么accept老出错。perror输出的信息是参数无效。
int listenfd = listen_socket(ip.s_addr,100);
if(-1 == listenfd)
{
print_error_location();
return -1;
}
//print addr
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
bzero(&addr,addrlen);
if(-1 == getsockname(listenfd,(struct sockaddr*)&addr,&addrlen))
{
print_error_location();
return -1;
}
printf("ip addr is :%s,port:%d\n",inet_ntoa(addr.sin_addr),ntohs(addr.sin_port));
//accept a connect requset
while(1)
{
int acceptfd = accept(listenfd,NULL,NULL);//acceptfd的值老为-1，这是为啥？
//如果是listenfd的值无效，那上面的getsockname为什么会调用成功？
if(-1 == acceptfd)
{
print_error_location();
perror("accept wrong!\n");
continue;
}
//create a thread to recv file from client
pthread_t tid;
PAR_TO_THREAD *p = (PAR_TO_THREAD*)malloc(sizeof(PAR_TO_THREAD));
int err = pthread_create(&tid,NULL,file_recv,(void*)p);
if(0 != err)
{
perror("create thread faild\n");
continue;
}
}
//另一文件中
#include "mysocket.h"
int listen_socket(in_addr_t ip,int backlog)
{
int listenfd = socket(AF_INET,SOCK_STREAM,0);
if(-1 == listenfd)
{
print_error_location();
perror("tcpServerSocket: create socket error!");
return -1;
}
//bind ip,let sys choose a port for us.
struct sockaddr_in addr;
bzero(&addr,sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = ip;
if(-1 == bind(listenfd,(struct sockaddr*)&addr,sizeof(addr)))
//listen...
if(listen(listenfd,backlog) == -1)
{
print_error_location();
perror("tcpServerSocket: listen error");
return -1;
}
return listenfd;
}
我单步跟踪的结果表示man函数中的listenfd的值一直没变，为啥就不能在上面accept呢？
输出结果是：
ip addr is :192.168.1.222,port:42733
-->myerror.h,print_error_location,7,accept wrong!
: Invalid argument
