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如何派/接收2级轮椅
原标题:How to send/receive layer 2 frames on wlan

<>Iwanna do: 在用户空间执行2级协议。

因此,使用pcap低于LC 2.6.32的电线包装:

    ...
    struct pcap_t *pcap_h = pcap_open_live("wlan0", BUFSIZ, 1, 0, errbuf);
    ...
    while (1) { 
          int ret = pcap_loop(pcap_h, -1, newpkt_callback, NULL);
          ...
    }
    ...

对所有包装单只做罚款。 但是,当我使用pcap来寄发包裹时,无异于头,也没有计生机:

    const char pkt[] = "WHATEVER";
    nsent = pcap_sendpacket(pcap_h, (const u_char *)pkt, len);
    ...

我只能把包裹放在当地影子上,而不是放在管理同一节目的其他手提电脑上。 因此,问题是,“我怎么能够用不成像的电线播放? 欢迎任何要点。

问题回答

如果你使用一个接入点(基础设施模式)的话,那么你就能够这样做,因为接入点改变了其他无线站之间的界限,因此必须知道如何谈论第2级议定书。

I suggest implementing your protocol at layer 3 (and you may want to look into PF_PACKET sockets).

You have to send complete frame with it s headers, not just some random data. Take a look at this manual http://linux.die.net/man/3/pcap at function pcap_inject(). In creating new frame this could help http://www.tcpdump.org/pcap.html, or just use libnet library http://libnet.sourceforge.net/libnet.html.





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