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From: Johannes Berg <johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
To: Guy Harris <guy-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org>
Cc: "Harald Welte" <laforge-TgoAw6mPHtdg9hUCZPvPmw@public.gmane.org>,
	openbsc-qjLDD68F18N4m7O/Vxda39i2O/JbrIOy@public.gmane.org,
	radiotap-S783fYmB3Ccdnm+yROfE0A@public.gmane.org,
	linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	"Subash Abhinov Kasiviswanathan"
	<subashab-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	"Dan Williams" <dcbw-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	"Bjørn Mork" <bjorn-yOkvZcmFvRU@public.gmane.org>,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	"Sean Tranchetti"
	<stranche-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	"Aleksander Morgado"
	<aleksander-Dvg4H30XQSRVIjRurl1/8g@public.gmane.org>
Subject: Re: gsmtap design/extensions?
Date: Mon, 15 Apr 2019 11:28:30 +0200
Message-ID: <446da2afcad3c7bb539027147030649ad08f3f33.camel@sipsolutions.net> (raw)
In-Reply-To: <1089142F-2966-4C41-921B-465FBA721E79-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org>

On Fri, 2019-04-12 at 12:48 -0700, Guy Harris wrote:

> I.e., there's a split there between "capture" and "getting the packets
> from a capture delivered to you over an IP network".

Right. That's what I was trying to get at, you said it much more
succinctly.

> Depending on how your system is set up:
> 
> 	$ ls -l /dev/bpf*
> 	crw-rw----  1 root  access_bpf   23,   0 Apr 10 22:57 /dev/bpf0
> 	crw-rw----  1 root  access_bpf   23,   1 Apr 10 22:56 /dev/bpf1
> 
> 		...
> 
> and it could just be rw-rw-rw-.  Perhaps other systems make it harder
> to grant capture privileges.

Yeah, generally it's not that *hard*. It still seems *wrong*, and e.g.
it would also mean if you do need to do it remotely you'd have to filter
out your own remote control (ssh) traffic lest you cause traffic
amplification, etc.

johannes

      parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-09 13:50 Johannes Berg
     [not found] ` <CAPEnp=bHTVARr7WA9Qkq4=y7kk8_FLWhrkqKOEXubMO4X=BHCw@mail.gmail.com>
     [not found]   ` <CAPEnp=bHTVARr7WA9Qkq4=y7kk8_FLWhrkqKOEXubMO4X=BHCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-10  7:23     ` Johannes Berg
     [not found]       ` <46474c61d7748042cc0a1f23773186786020638e.camel-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
2019-04-10  7:57         ` Marcel Holtmann
2019-04-10 23:45         ` Harald Welte
     [not found]       ` <6F1998DC-EFD2-4145-BD81-A80F9DC7ED2D@holtmann.org>
     [not found]         ` <6F1998DC-EFD2-4145-BD81-A80F9DC7ED2D-kz+m5ild9QBg9hUCZPvPmw@public.gmane.org>
2019-04-12 12:12           ` Johannes Berg
     [not found]             ` <1d64c578cd5b254d301cf1cac82f32a062916888.camel-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
2019-04-12 19:49               ` Marcel Holtmann
     [not found]             ` <D4D12CF9-9CE5-46FB-9738-F89DB6B6F9EA@holtmann.org>
     [not found]               ` <D4D12CF9-9CE5-46FB-9738-F89DB6B6F9EA-kz+m5ild9QBg9hUCZPvPmw@public.gmane.org>
2019-04-15  9:11                 ` Johannes Berg
     [not found]                   ` <92e8e142b6d441c1c995abc57d64ad7b7747a688.camel-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
2019-04-15 10:29                     ` Bjørn Mork
     [not found]                       ` <87d0ln1s0a.fsf-3F4PFWf5pNjpjLOzFPqGjWGXanvQGlWp@public.gmane.org>
2019-04-15 10:41                         ` Johannes Berg
     [not found]       ` <20190410234555.GO25552@nataraja>
2019-04-12 17:15         ` Johannes Berg
     [not found]           ` <f0a64bb751b8c601f58130a7f3a3158d70f18f63.camel-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
2019-04-12 19:54             ` Guy Harris
2019-04-13  7:12             ` Harald Welte
2019-04-13  7:49               ` Guy Harris
     [not found]           ` <196E881D-AB4A-4569-9C1F-5BCB41FE832F@alum.mit.edu>
     [not found]             ` <196E881D-AB4A-4569-9C1F-5BCB41FE832F-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org>
2019-04-12 22:47               ` Guy Harris
     [not found]                 ` <1D6FE33B-DC15-47D8-A1AD-E95608300FDC-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org>
2019-04-13  6:41                   ` Harald Welte
     [not found]                 ` <20190413064152.GB24451@nataraja>
2019-04-13  7:36                   ` Guy Harris
     [not found] ` <cf07ae24c436f92769f9289d208f01846ebe8826.camel-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
2019-04-10  6:35   ` Vadim Yanitskiy
2019-04-10 23:32   ` Harald Welte
2019-04-12 12:24     ` Johannes Berg
     [not found]       ` <1462659018bc40830efbe2348791b8df45b54cff.camel-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
2019-04-12 19:48         ` Guy Harris
2019-04-13  7:35         ` Harald Welte
     [not found]       ` <20190413073505.GD24451@nataraja>
2019-04-13  7:55         ` Guy Harris
2019-04-15  9:26         ` Johannes Berg
     [not found]       ` <1089142F-2966-4C41-921B-465FBA721E79@alum.mit.edu>
     [not found]         ` <1089142F-2966-4C41-921B-465FBA721E79-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org>
2019-04-15  9:28           ` Johannes Berg [this message]

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