fprintf中使用插座的MinGW [英] fprintf on socket using mingw
本文介绍了fprintf中使用插座的MinGW的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有是Windows 插座上的有趣的帖子 fprintf中使用的建议与派的包装更换fprintf中格式化缓冲区套接字。
There is an interesting post Use fprintf on a socket in Windows that advise to replace fprintf with a wrapper that send a formated buffer to the socket.
然而,似乎可能使用_open_osfhandle到插座转换为文件描述符
However, it seems possible to use _open_osfhandle to convert the socket to a filedescriptor.
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <windows.h>
int main(int argc, char* argv[])
{
if (argc < 3)
{
fprintf(stderr,"usage %s <hostname> <port>\n", argv[0]);
exit(0);
}
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
int port = atoi(argv[2]);
struct hostent *server = gethostbyname(argv[1]);
if (server == NULL)
{
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
struct sockaddr_in serv_addr;
memset(&serv_addr, 0, sizeof(struct sockaddr_in));
memcpy((char *)&serv_addr.sin_addr.s_addr, (char *)server->h_addr, server->h_length);
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(port);
int sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock == -1)
{
perror("socket");
exit(0);
}
int result = connect(sock, (struct sockaddr*)&serv_addr, sizeof(struct sockaddr_in));
if(result == -1)
{
perror("connect");
exit(0);
}
int OSFileHandle = _open_osfhandle(sock, _O_APPEND);
FILE * fd = fdopen(OSFileHandle, "w+");
if (fd == NULL)
{
perror("fdopen");
exit(0);
}
fprintf(fd, "Hello World\r\n");
fclose(fd);
closesocket(sock);
WSACleanup();
}
使用这个code连接到一台服务器(例如NC -l -p)亘古不变的工作。收到没什么,只是netcat的退出。
Using this code to connect to a server (for instance nc -l -p ) doesnot work. Nothing is received, netcat just exit.
推荐答案
的 MSDN文档说则创建具有重叠属性作为默认的套接字
为了创建无WSA_FLAG_OVERLAPPED标志插座解决问题使用WSASocket:
Using WSASocket in order to create a socket without the WSA_FLAG_OVERLAPPED flag solve the problem :
int sock = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, 0);
这篇关于fprintf中使用插座的MinGW的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文