调用connect然后返回-1,查了下文档是这么说的 EINPROGRESS --- The socket is nonblocking and the connection cannot be completed immediately. It is possible to select(2) or poll(2) for completion by selecting the socket for writing. After select(2) indicates writability, use getsockopt(2) to read...
(1) errno = 99的原因; 至于connect系统调用为什么返回失败,就只能看系统调用的实现了。 a) connect系统调用 connect系统调用在net/socket.c中实现,Sys_connect系统调用的调用栈如下: Sys_connect---> sock->ops->connect // inet_stream_connect sk->sk_prot->connect // tcp_v4_connect tcp_v4_connect的...
Connection refused:应该是连接的服务端没有启动或者连接端口错误,可以用如下代码测试 client端: 1#include <stdio.h>2#include <sys/types.h>/*See NOTES*/3#include <sys/socket.h>4#include <strings.h>5#include <unistd.h>6#include <netinet/in.h>7#include <string.h>8#include <arpa/inet.h>9...
A connect request was made on an already connected socket. Some implementations also return this error if sendto is called on a connected SOCK_DGRAM socket (For SOCK_STREAM sockets, the to parameter in sendto is ignored), although other implementations treat this as a legal occurrence. 连接过...
socket.error: [Errno 99] Cannot assign requested address 网上你去搜,基本都是说bind的时候,地址已经被用了,都是胡扯。地址被用报的错误应该是: Address already in use才对 然后我看得都是英文的,说明外国人也不是想象中的那么一丝不苟, 言归正传。socket发起connect请求的时候会随机分配一个端口给你。这个...
connect()函数 connect头文件: #include<sys/types.h> #include<sys/socket.h> 1. 2. connect声明: int connect (int sockfd, struct sockaddr * serv_addr, int addrlen); 1. connect功能: 使用套接字sockfd建立到指定网络地址serv_addr的socket连接,参数addrlen为serv_addr指向的内存空间大小,即sizeof(str...
你的servaddr里的IP地址或PORT端口号设置错了吧。服务端和客户端的简单里子请参考：http://blog.csdn.net/flynetcn/article/details/5829258 这样
< "create socket error " << std::endl; return -1; } // 设置服...
connect的问题,当connect遇到EINTR错误时,不能向上面那样重新进入循环处理,原因是,connect的请求已经发送向对方,正在等待对方回应,这是如果重新调用connect,而对方已经接受了上次的connect请求,这一次的connect就会被拒绝,因此,需要使用select或poll调用来检查socket的状态,如果socket的状态就绪,则connect已经成功,否则,视错误...
(EXIT_FAILURE);}//error is not 0,meaning connect errorif(error!=0){printf("connect failed after select with the error:%d\n",error);close(sock_fd);return-1;}//connect successprintf("connect ready after select with the socket:%d\n",sock_fd);//set fd block and returnfcntl(sock_fd,...