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Home Backend Development PHP Tutorial 抱一点期望,有热心人能帮我看看socket的问题

抱一点期望,有热心人能帮我看看socket的问题

Jun 23, 2016 pm 02:05 PM

想实现这样的功能:
    向整个局域网发送广播,
    然后获取全部的返回信息。

$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);socket_set_option($socket, SOL_SOCKET, SO_BROADCAST, 1);$message="1000";@socket_sendto($socket,$message,strlen($message),0,"255.255.255.255",6000);$ip="";$port=6000;@socket_recvfrom($socket,$message,0,0,$ip,$port);
Copy after login


广播好像成功了,但是接收的代码好像有问题,上述代码会停不下来
其原因是有的ip没有返回结果,这个代码好像会一直等
我改为不等,但是所有返回结果都抓取不到了……

希望有热心人帮忙看看


回复讨论(解决方案)

是否成果应检查 socket_sendto 的返回值
参数 addr 好像不对吧? udp 方式应该是网段的最后一个地址
比如
192.168.5.0/24
那么网段为 192.168.5.0 掩码 255.255.255.0 广播地址为 192.168.5.255

socket_recvfrom 是侦听,好像你的 $ip 是空的嘛

版主很给力  听版主的肯定没错

谢谢版主的回复
    我需要全网段广播,如果有人回应,我希望获取这个回应
    $ip是空的,好像是可以这样传参的,因为不确定哪个ip会回应
    (比我我喊,谁有钱借我点?可能会有2个人答应,我这里有。我就想得到他们答应的内容)
    或许有其他的写法?

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