From patchwork Sun Jun 9 16:56:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sven Eckelmann X-Patchwork-Id: 17939 X-Patchwork-Delegate: sw@simonwunderlich.de Return-Path: X-Original-To: patchwork@open-mesh.org Delivered-To: patchwork@open-mesh.org Received: from open-mesh.org (localhost [IPv6:::1]) by open-mesh.org (Postfix) with ESMTP id CE65A8268E; Sun, 9 Jun 2019 18:57:20 +0200 (CEST) Received: from durin.narfation.org (durin.narfation.org [79.140.41.39]) by open-mesh.org (Postfix) with ESMTPS id E79428267F for ; Sun, 9 Jun 2019 18:57:16 +0200 (CEST) Received: from sven-desktop.home.narfation.org (unknown [IPv6:2a00:1ca0:1480:f1fc::4065]) by durin.narfation.org (Postfix) with ESMTPSA id F0E061100D0; Sun, 9 Jun 2019 18:57:14 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=narfation.org; s=20121; t=1560099435; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K07//YnMq2ayadnuAMooGPtD1fXsPJ1oagTcUSh5KOM=; b=lePz0KPgstF6o07gh4wmibo580QvVwQsRarbUAJW0zauuWyTgwu6kX1NBZrm81XTENNbn+ apmnxedupGYRqr0c4mP+wD4yfkRplWbK6OnAOQOHO6YH/PNmeeJqT4AIDQw84MKWYHY4Js ykezjNwIg0wurVJOA0nI+0JQiX2bpZw= From: Sven Eckelmann To: b.a.t.m.a.n@lists.open-mesh.org Subject: [PATCH 3/3] batctl: tcpdump: Add support for coded packets Date: Sun, 9 Jun 2019 18:56:52 +0200 Message-Id: <20190609165652.12841-4-sven@narfation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190609165652.12841-1-sven@narfation.org> References: <20190609165652.12841-1-sven@narfation.org> MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=narfation.org; s=20121; t=1560099435; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K07//YnMq2ayadnuAMooGPtD1fXsPJ1oagTcUSh5KOM=; b=EQAhk4xFrcj1fzWSrqEwcGt1C/CoomzqoHeqs7yfIahWT/lQqIkww7wGsDUcJwY2J99zVB OO8K8y2gf3+hL4XO4pMXj4SjYciH6qs7FpiL2wibSPzbPyAfdqYvKly8bh2iA6O6l5e/26 MPd/KVQ5T/h2SRp8UUgtIjzfUyMyYlE= ARC-Seal: i=1; s=20121; d=narfation.org; t=1560099435; a=rsa-sha256; cv=none; b=Zsiw18Cu/VQTObI/HcasZIH+S9rbqWam3oCIA3AYXnPKaC6COAmYV9XqfN+Qp7VpCcpXHr lvOEYHoVnomIAiaiidgR4OzgWf7unzRTEQ13yVlCCXU4Rzw3wmnX1zl7K0FarBT1gnej2H OjIfzE2M0V8uVtOYHMJHhnD/mN0TRlw= ARC-Authentication-Results: i=1; ORIGINATING; auth=pass smtp.auth=sven smtp.mailfrom=sven@narfation.org X-BeenThere: b.a.t.m.a.n@lists.open-mesh.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking Cc: =?utf-8?q?Martin_Hundeb=C3=B8ll?= Errors-To: b.a.t.m.a.n-bounces@lists.open-mesh.org Sender: "B.A.T.M.A.N" The network coding support in batman-adv was introduced with commit c3289f3650d3 ("batman-adv: network coding - code and transmit packets if possible"). The support to identify such packets by batctl's tcpdump was never implemented. This minimal implementation allows to identify these packets but is not able to decode the packets. Signed-off-by: Sven Eckelmann --- Cc: Martin Hundebøll tcpdump.c | 33 ++++++++++++++++++++++++++++++++- tcpdump.h | 1 + 2 files changed, 33 insertions(+), 1 deletion(-) diff --git a/tcpdump.c b/tcpdump.c index 7d04dd5..158b82e 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -56,7 +56,7 @@ static unsigned short dump_level_all = DUMP_TYPE_BATOGM | DUMP_TYPE_BATOGM2 | DUMP_TYPE_BATELP | DUMP_TYPE_BATICMP | DUMP_TYPE_BATUCAST | DUMP_TYPE_BATBCAST | DUMP_TYPE_BATUTVLV | DUMP_TYPE_BATFRAG | - DUMP_TYPE_NONBAT; + DUMP_TYPE_NONBAT | DUMP_TYPE_BATCODED; static unsigned short dump_level; static void parse_eth_hdr(unsigned char *packet_buff, ssize_t buff_len, int read_opt, int time_printed); @@ -80,6 +80,7 @@ static void tcpdump_usage(void) fprintf(stderr, " \t\t%3d - batman fragmented packets\n", DUMP_TYPE_BATFRAG); fprintf(stderr, " \t\t%3d - batman unicast tvlv packets\n", DUMP_TYPE_BATUTVLV); fprintf(stderr, " \t\t%3d - non batman packets\n", DUMP_TYPE_NONBAT); + fprintf(stderr, " \t\t%3d - batman coded packets\n", DUMP_TYPE_BATCODED); fprintf(stderr, " \t\t%3d - batman ogm & non batman packets\n", DUMP_TYPE_BATOGM | DUMP_TYPE_NONBAT); } @@ -981,6 +982,32 @@ static void dump_batman_bcast(unsigned char *packet_buff, ssize_t buff_len, int read_opt, time_printed); } +static void dump_batman_coded(unsigned char *packet_buff, ssize_t buff_len, int read_opt, int time_printed) +{ + struct batadv_coded_packet *coded_packet; + struct ether_header *ether_header; + + LEN_CHECK((size_t)buff_len - sizeof(*ether_header), sizeof(*coded_packet), "BAT CODED"); + + ether_header = (struct ether_header *)packet_buff; + coded_packet = (struct batadv_coded_packet *)(packet_buff + sizeof(*ether_header)); + + if (!time_printed) + time_printed = print_time(); + + printf("BAT %s > ", + get_name_by_macaddr((struct ether_addr *)ether_header->ether_shost, + read_opt)); + + printf("%s|%s: CODED, ttvn %d|%d, ttl %hhu\n", + get_name_by_macaddr((struct ether_addr *)coded_packet->first_orig_dest, + read_opt), + get_name_by_macaddr((struct ether_addr *)coded_packet->second_dest, + read_opt), + coded_packet->first_ttvn, coded_packet->second_ttvn, + coded_packet->ttl); +} + static void dump_batman_4addr(unsigned char *packet_buff, ssize_t buff_len, int read_opt, int time_printed) { struct ether_header *ether_header; @@ -1073,6 +1100,10 @@ static void parse_eth_hdr(unsigned char *packet_buff, ssize_t buff_len, int read if (dump_level & DUMP_TYPE_BATBCAST) dump_batman_bcast(packet_buff, buff_len, read_opt, time_printed); break; + case BATADV_CODED: + if (dump_level & DUMP_TYPE_BATCODED) + dump_batman_coded(packet_buff, buff_len, read_opt, time_printed); + break; case BATADV_UNICAST_4ADDR: if (dump_level & DUMP_TYPE_BATUCAST) dump_batman_4addr(packet_buff, buff_len, read_opt, time_printed); diff --git a/tcpdump.h b/tcpdump.h index 6e9ae01..470b96a 100644 --- a/tcpdump.h +++ b/tcpdump.h @@ -33,6 +33,7 @@ #define DUMP_TYPE_BATUTVLV 64 #define DUMP_TYPE_BATFRAG 128 #define DUMP_TYPE_NONBAT 256 +#define DUMP_TYPE_BATCODED 512 #define IEEE80211_FCTL_FTYPE 0x0c00 #define IEEE80211_FCTL_TODS 0x0001