From owner-freebsd-net@freebsd.org Mon Jul 29 14:17:16 2019 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 46D62AAB32 for ; Mon, 29 Jul 2019 14:17:16 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (br1.CN84in.dnsmgr.net [69.59.192.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B227185689; Mon, 29 Jul 2019 14:17:05 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (localhost [127.0.0.1]) by gndrsh.dnsmgr.net (8.13.3/8.13.3) with ESMTP id x6TEGuwr044413; Mon, 29 Jul 2019 07:16:56 -0700 (PDT) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: (from freebsd-rwg@localhost) by gndrsh.dnsmgr.net (8.13.3/8.13.3/Submit) id x6TEGtl4044412; Mon, 29 Jul 2019 07:16:55 -0700 (PDT) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <201907291416.x6TEGtl4044412@gndrsh.dnsmgr.net> Subject: Re: Is there an way for a program to know when the list of network interfaces has changed (without rescanning them)? In-Reply-To: To: Yuri Date: Mon, 29 Jul 2019 07:16:55 -0700 (PDT) CC: "freebsd-net@freebsd.org" , tuexen@freebsd.org X-Mailer: ELM [version 2.4ME+ PL121h (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: B227185689 X-Spamd-Bar: ++++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [4.53 / 15.00]; ARC_NA(0.00)[]; TO_DN_EQ_ADDR_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; IP_SCORE(0.04)[ip: (0.15), ipnet: 69.59.192.0/19(0.07), asn: 13868(0.05), country: US(-0.05)]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; DMARC_NA(0.00)[dnsmgr.net]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.87)[0.874,0]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.74)[0.743,0]; MX_GOOD(-0.01)[gndrsh.dnsmgr.net,gndrsh.dnsmgr.net]; NEURAL_SPAM_LONG(0.98)[0.979,0]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:13868, ipnet:69.59.192.0/19, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_LAST(0.00)[] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Jul 2019 14:17:16 -0000 > I am asking because wireshark doesn't sense the interface list changes, > and it just always shows the list from the time it was launched . I am cc'ing Michael Tuexen , both a FreeBSD and long time wireshare developer. I see there has been at least 2 ways proposed to you for doing this, I would suggest using the route socket as the prefered method as that should be some what portable accross all the BSD type platforms, a devd solution would be FreeBSD specific. > Yuri -- Rod Grimes rgrimes@freebsd.org