The simple version is that I am seeing poll repeatedly returning
POLLIN but when pcap checks the mmaped memory it finds TP_STATUS_USER
is not set.
>From what I can see the only thing poll
(net/packet/af_packet.c:net/packet/af_packet.c) does is check if
TP_STATUS_USER is set. So, could it be that p
I am having a problem using libpcap in my program and I would like a
bit of guidance before I try to understand how Linux PACKET_MMAP
works.
Using an unpatched libpcap 1.4.0 (and a OpenWRT patched 1.1.1) I find
this call:
pcap_dispatch(pcap_descr, -1, placeholder, NULL);
after a blocking, succe
I am using libpcap-dev 0.9.8 in Ubuntu 12.04 on my laptop.
Setting my wlan0 interface to monitor mode using iwconfig and tcpdump -i
wlan0 -y IEEE802_11_RADIO
works fine but when doing it in C it fails with an DLT not supported by
device error.
Here is the source code excerpt that fails:
