From owner-freebsd-net@freebsd.org Wed Oct 16 02:53:14 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 0F7E315A290 for ; Wed, 16 Oct 2019 02:53:14 +0000 (UTC) (envelope-from nparhar@gmail.com) Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46tH0m4wMDz48Br for ; Wed, 16 Oct 2019 02:53:12 +0000 (UTC) (envelope-from nparhar@gmail.com) Received: by mail-pl1-x632.google.com with SMTP id c3so10536216plo.2 for ; Tue, 15 Oct 2019 19:53:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-disposition:in-reply-to:user-agent; bh=xO+D1CA8eeS2HZjvySQ3as26aMdk7IDcXuupVPrPtrk=; b=Hv3o0QGsVEalswM7CnfkPcxQZ+KBNsNPP+h8C4VSOfQ52B5jrkkND+fgyMvHKPrzHw gbATa9J1Db+wUFUm1BpAtzjPxti8AMzrIChYufnCBYYW0z0ABMOmye6QJ72HOaY7IyYE 6gpwfeCM5cDx1t5rB3yYjMkd68TOSk/vAS8aDFtJ0Lwl9OV2leqiqQqLZUKXZQvjz+KW MO5wFvMlxMyYtLlzOckdeRDqe/K1qMwxAmA5buSjxEsNqdS5YUc+RQUeW0b2969woJnO pakayf6BQs0DeBobcY/1Mk9EuJBKL+OK/3xHm856xpMPn8S6U8odlOK0dgZ3Ux2RzGEy 0xig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id :mail-followup-to:references:mime-version:content-disposition :in-reply-to:user-agent; bh=xO+D1CA8eeS2HZjvySQ3as26aMdk7IDcXuupVPrPtrk=; b=noAtIg4IpuRayUq1ibkixg3Ntg8jYfqnthgNUTdvSM/xDXUX45Yz8pgqfatLzJV59E LmKMlNR/o73+2/Yz7dcidDQ3HbTaRcdBlqqJ+mwnWJjndTKncrNqUCObwk0aPtI8Zohg zFDL1PUY3/uZrvbchzn9UHH8v0E3zJXc46xXaE16o+HifIRsPLnvjObSug3/XLXIPFg/ lFoKZNXnf7Lu/9uvI92qn+C2unr6oGCZP8Hy197PUa/UGsqf8uxmr8r6+JNkP8V3O+Z0 PsyAbczy+KaHWPdIj93sM/g1bZzQe9jlQfmDlXO2acYwJt23NlqOH4J/BqFcjDY/vRYd 379g== X-Gm-Message-State: APjAAAWR/RkAPOfgPNVjUCECFv5G1bD9Zsrt7vEDXlOBacg9dBRmF8N5 1j0Si0O7bGSKxBy4EMzc4bQ= X-Google-Smtp-Source: APXvYqwvqqTPzg+rg7fvSvbPyh+biuw4xvBs07byJopVMF+QzWLwapRuZSR2lWnkV5yikCbqABRD7g== X-Received: by 2002:a17:902:a404:: with SMTP id p4mr38891854plq.42.1571194390916; Tue, 15 Oct 2019 19:53:10 -0700 (PDT) Received: from x270 ([2601:641:c000:3700:71cc:bb31:bcf1:b99]) by smtp.gmail.com with ESMTPSA id x10sm28413501pfr.44.2019.10.15.19.53.09 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 15 Oct 2019 19:53:10 -0700 (PDT) Date: Tue, 15 Oct 2019 19:53:04 -0700 From: Navdeep Parhar To: vm finance Cc: Kevin Oberman , freebsd-net Subject: Re: logs/traces Message-ID: <20191016025233.GA14421@x270> Mail-Followup-To: vm finance , Kevin Oberman , freebsd-net References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Rspamd-Queue-Id: 46tH0m4wMDz48Br X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=Hv3o0QGs; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of nparhar@gmail.com designates 2607:f8b0:4864:20::632 as permitted sender) smtp.mailfrom=nparhar@gmail.com X-Spamd-Result: default: False [-2.50 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; IP_SCORE(0.00)[ip: (-9.57), ipnet: 2607:f8b0::/32(-2.48), asn: 15169(-2.10), country: US(-0.05)]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TAGGED_RCPT(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; MIME_GOOD(-0.10)[text/plain]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2.3.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; MID_RHS_NOT_FQDN(0.50)[]; FREEMAIL_CC(0.00)[gmail.com]; RCVD_TLS_ALL(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: Wed, 16 Oct 2019 02:53:14 -0000 Have you looked at siftr(4) or dtrace_tcp(4)? Regards, Navdeep On Tue, Oct 15, 2019 at 07:15:27PM -0700, vm finance wrote: > Hi Kevin, > > I am looking to enable traces/log messages (like syslog or > /var/log/messages) inside the codebase... any pointers for tcp/ip. > tcpdump shows what is going on wire - but I would like to trace code > internals...printk.. > > Thanks a lot! > > On Tue, Oct 15, 2019 at 6:11 PM Kevin Oberman wrote: > > > Use tcpdump(1) and/or net/wireshark(5). See man tcpdump and pcap-filter > > for usage details. wireshark can analyze files collected by tcpdump and > > dissect the packets. It can also do packet capture, itself. > > -- > > Kevin Oberman, Part time kid herder and retired Network Engineer > > E-mail: rkoberman@gmail.com > > PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683 > > > > > > On Tue, Oct 15, 2019 at 3:17 AM vm finance wrote: > > > >> Hi, > >> > >> Could someone please guide me on how to turn on tracing/log? > >> > >> I would like to follow/track how packets go in/out of TCP code block... > >> Please let me know what knobs are available to achieve this. > >> > >> Thanks for any pointers. > >> _______________________________________________ > >> freebsd-net@freebsd.org mailing list > >> https://lists.freebsd.org/mailman/listinfo/freebsd-net > >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > >> > > > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"