[OpenWrt-Devel] [PATCH] libpcap: patch to add limits.h to pcap-usb-linux.c

Michael Richardson mcr at sandelman.ca
Mon Aug 20 16:58:02 EDT 2018


bjorn at mork.no wrote:
    >> I've been into the LTE modem driver business for a while. Captures
    >> from end users with some modem hardware/firmware specific issue have
    >> often been the only way to fully understand a problem

Michael Holstein <moholstein at gmail.com> wrote:
    > why not just create a bridge and tcpdump that. That code is far lower
    > in the kernel than the ability to put a USB device in promisc mode (and
    > I should point out that promic isn't going to matter since Verizon
    > isn't treating your either end of the IP interface as a switchport
    > where you'd see L2 traffic in promisc fashion.

That won't capture USB level things.
LTE modems look like async modems, and run PPP over a serial layer.
Many device need stupid USB-based unlock sequences that have nothing to do
with networking.

--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     mcr at sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [


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