错误代码
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| if (recvfrom(socket, recv_buf, sizeof(recv_data), 0, (sockaddr *)&server_addr, NULL) == SOCKET_ERROR) {
WinSock::printError("recvfrom error");
return false;
}
|
原因
recvfrom最后一个参数是指定socket地址，为传入传出参数，不能为NULL!
解决
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| int len = sizeof(server_addr);
if (recvfrom(socket, recv_buf, sizeof(recv_data), 0, (sockaddr *)&server_addr, &len) == SOCKET_ERROR) {
WinSock::printError("recvfrom error");
return false;
}
|
参考
- http://stackoverflow.com/questions/17306405/c-udp-recvfrom-is-acting-strange-wsagetlasterror-10014