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libpcap: add support for B.A.T.M.A.N. Advanced
This adds support for the layer 2 mesh routing protocol B.A.T.M.A.N. Advanced. "batadv" can be used to filter on batman-adv packets. It also allows later filters to look at frames inside the tunnel when both "version" and "type" are specified. Documentation for the batman-adv protocol can be found at the following locations: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/batman-adv.rst https://www.open-mesh.org/ -- This is a backport of the following upstream pull request: https://github.com/the-tcpdump-group/libpcap/pull/980 -> "Add support for B.A.T.M.A.N. Advanced #980" Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
This commit is contained in:
Linus Lüssing
Hauke Mehrtens
parent
550e5b2184
commit
26d10bad7c
@ -0,0 +1,642 @@
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From b86b960fbd5c215c9c0f43544935b9a25d9445c5 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
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Date: Mon, 23 Nov 2020 00:38:22 +0100
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Subject: [PATCH] Add support for B.A.T.M.A.N. Advanced
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This adds support for the layer 2 mesh routing protocol
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B.A.T.M.A.N. Advanced. "batadv" can be used to filter on batman-adv
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packets. It also allows later filters to look at frames inside the
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tunnel when both "version" and "type" are specified.
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Documentation for the batman-adv protocol can be found at the following
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locations:
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/batman-adv.rst
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https://www.open-mesh.org/
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Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
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---
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Makefile.in | 2 +
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batadv_legacy_packet.h | 77 +++++++++++++++++++
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batadv_packet.h | 78 ++++++++++++++++++++
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ethertype.h | 3 +
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gencode.c | 164 +++++++++++++++++++++++++++++++++++++++++
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gencode.h | 3 +
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grammar.y.in | 32 +++++++-
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nametoaddr.c | 59 +++++++++++++++
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pcap-filter.manmisc.in | 35 ++++++++-
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pcap/namedb.h | 2 +
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scanner.l | 1 +
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11 files changed, 453 insertions(+), 3 deletions(-)
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create mode 100644 batadv_legacy_packet.h
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create mode 100644 batadv_packet.h
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--- a/Makefile.in
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+++ b/Makefile.in
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@@ -134,6 +134,8 @@ PUBHDR = \
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HDR = $(PUBHDR) \
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arcnet.h \
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atmuni31.h \
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+ batadv_legacy_packet.h \
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+ batadv_packet.h \
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diag-control.h \
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ethertype.h \
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extract.h \
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--- /dev/null
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+++ b/batadv_legacy_packet.h
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@@ -0,0 +1,77 @@
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+/* SPDX-License-Identifier: BSD-3 */
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+/* Copyright (C) 2020 Linus Lüssing */
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+
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+#ifndef _BATADV_LEGACY_PACKET_H_
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+#define _BATADV_LEGACY_PACKET_H_
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+
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+enum batadv_legacy_packettype {
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+ BATADV_LEGACY_IV_OGM = 0x01,
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+ BATADV_LEGACY_ICMP = 0x02,
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+ BATADV_LEGACY_UNICAST = 0x03,
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+ BATADV_LEGACY_BCAST = 0x04,
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+ BATADV_LEGACY_VIS = 0x05,
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+ BATADV_LEGACY_UNICAST_FRAG = 0x06,
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+ BATADV_LEGACY_TT_QUERY = 0x07,
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+ BATADV_LEGACY_ROAM_ADV = 0x08,
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+ BATADV_LEGACY_UNICAST_4ADDR = 0x09,
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+ BATADV_LEGACY_CODED = 0x0a,
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+};
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+
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+#define ETH_ALEN 6
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+
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+struct batadv_legacy_unicast_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t ttvn;
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+ uint8_t dest[ETH_ALEN];
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+};
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+
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+struct batadv_legacy_unicast_4addr_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t src[ETH_ALEN];
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+ uint8_t subtype;
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+ uint8_t reserved;
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+};
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+
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+struct batadv_legacy_unicast_frag_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t ttvn;
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+ uint8_t dest[ETH_ALEN];
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+ uint8_t flags;
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+ uint8_t align;
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+ uint8_t orig[ETH_ALEN];
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+ uint8_t seqno[2]; /* 2-byte integral value */
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+};
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+
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+struct batadv_legacy_bcast_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t reserved;
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+ uint8_t seqno[4]; /* 4-byte integral value */
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+ uint8_t orig[ETH_ALEN];
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+};
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+
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+struct batadv_legacy_coded_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t first_ttvn;
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+ uint8_t first_source[ETH_ALEN];
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+ uint8_t first_orig_dest[ETH_ALEN];
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+ uint8_t first_crc[4]; /* 4-byte integral value */
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+ uint8_t second_ttl;
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+ uint8_t second_ttvn;
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+ uint8_t second_dest[ETH_ALEN];
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+ uint8_t second_source[ETH_ALEN];
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+ uint8_t second_orig_dest[ETH_ALEN];
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+ uint8_t second_crc[4]; /* 4-byte integral value */
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+ uint8_t coded_len[2]; /* 2-byte integral value */
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+};
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+
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+#endif /* _BATADV_LEGACY_PACKET_H_ */
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--- /dev/null
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+++ b/batadv_packet.h
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@@ -0,0 +1,78 @@
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+/* SPDX-License-Identifier: BSD-3 */
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+/* Copyright (C) 2020 Linus Lüssing */
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+
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+#ifndef _BATADV_PACKET_H_
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+#define _BATADV_PACKET_H_
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+
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+/* For the definitive and most recent packet format definition,
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+ * see the batadv_packet.h in the Linux kernel.
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+ */
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+
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+enum batadv_packettype {
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+ BATADV_IV_OGM = 0x00,
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+ BATADV_BCAST = 0x01,
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+ BATADV_CODED = 0x02,
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+ BATADV_ELP = 0x03,
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+ BATADV_OGM2 = 0x04,
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+ BATADV_UNICAST = 0x40,
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+ BATADV_UNICAST_FRAG = 0x41,
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+ BATADV_UNICAST_4ADDR = 0x42,
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+ BATADV_ICMP = 0x43,
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+ BATADV_UNICAST_TVLV = 0x44,
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+};
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+
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+#define ETH_ALEN 6
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+
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+struct batadv_unicast_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t ttvn;
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+ uint8_t dest[ETH_ALEN];
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+};
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+
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+struct batadv_unicast_4addr_packet {
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+ struct batadv_unicast_packet u;
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+ uint8_t src[ETH_ALEN];
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+ uint8_t subtype;
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+ uint8_t reserved;
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+};
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+
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+struct batadv_frag_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t num_pri; /* number and priority */
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+ uint8_t dest[ETH_ALEN];
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+ uint8_t orig[ETH_ALEN];
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+ uint8_t seqno[2]; /* 2-byte integral value */
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+ uint8_t total_size[2]; /* 2-byte integral value */
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+};
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+
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+struct batadv_bcast_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t reserved;
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+ uint8_t seqno[4]; /* 4-byte integral value */
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+ uint8_t orig[ETH_ALEN];
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+};
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+
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+struct batadv_coded_packet {
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+ uint8_t packet_type;
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+ uint8_t version;
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+ uint8_t ttl;
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+ uint8_t first_ttvn;
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+ uint8_t first_source[ETH_ALEN];
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+ uint8_t first_orig_dest[ETH_ALEN];
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+ uint8_t first_crc[4]; /* 4-byte integral value */
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+ uint8_t second_ttl;
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+ uint8_t second_ttvn;
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+ uint8_t second_dest[ETH_ALEN];
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+ uint8_t second_source[ETH_ALEN];
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+ uint8_t second_orig_dest[ETH_ALEN];
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+ uint8_t second_crc[4]; /* 4-byte integral value */
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+ uint8_t coded_len[2]; /* 2-byte integral value */
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+};
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+
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+#endif /* _BATADV_PACKET_H_ */
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--- a/ethertype.h
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+++ b/ethertype.h
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@@ -49,6 +49,9 @@
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#ifndef ETHERTYPE_TRAIL
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#define ETHERTYPE_TRAIL 0x1000
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#endif
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+#ifndef ETHERTYPE_BATMAN
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+#define ETHERTYPE_BATMAN 0x4305 /* B.A.T.M.A.N. Advanced */
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+#endif
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#ifndef ETHERTYPE_MOPDL
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#define ETHERTYPE_MOPDL 0x6001
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#endif
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--- a/gencode.c
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+++ b/gencode.c
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@@ -74,6 +74,8 @@
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#include "atmuni31.h"
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#include "sunatmpos.h"
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#include "ppp.h"
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+#include "batadv_packet.h"
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+#include "batadv_legacy_packet.h"
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#include "pcap/sll.h"
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#include "pcap/ipnet.h"
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#include "arcnet.h"
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@@ -9501,6 +9503,168 @@ gen_geneve(compiler_state_t *cstate, bpf
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return b1;
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}
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+static struct block *
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+gen_batadv_check_version(compiler_state_t *cstate, struct block *b0, bpf_u_int32 version)
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+{
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+ struct block *b1;
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+
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+ if (version > UINT8_MAX)
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+ bpf_error(cstate,
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+ "batman-adv compatibility version number %u unsupported",
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+ version);
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+
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+ b1 = gen_cmp(cstate, OR_LINKPL, 1, BPF_B, version);
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+ gen_and(b0, b1);
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+
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+ return b1;
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+}
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+
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+static struct block *
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+gen_batadv_check_type(compiler_state_t *cstate, struct block *b0,
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+ bpf_u_int32 version, bpf_u_int32 type)
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+{
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+ struct block *b1;
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+
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+ switch (version) {
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+ case 14:
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+ case 15:
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+ if (type > UINT8_MAX)
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+ bpf_error(cstate,
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+ "batman-adv packet type %u unsupported for compatibility version %u",
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+ type, version);
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+
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+ b1 = gen_cmp(cstate, OR_LINKPL, 0, BPF_B, type);
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+ gen_and(b0, b1);
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+ b0 = b1;
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+
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+ break;
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+ default:
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+ bpf_error(cstate,
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+ "batman-adv compatibility version number %u unsupported",
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+ version);
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+ }
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+
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+ return b0;
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+}
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+
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+
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+static void gen_batadv_push_offset(compiler_state_t *cstate, u_int offset)
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+{
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+ PUSH_LINKHDR(cstate, DLT_EN10MB, cstate->off_linkpl.is_variable,
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+ cstate->off_linkpl.constant_part + cstate->off_nl + offset,
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+ cstate->off_linkpl.reg);
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+
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+ cstate->off_linktype.constant_part += cstate->off_linkhdr.constant_part;
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+ cstate->off_linkpl.constant_part += cstate->off_linkhdr.constant_part;
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+
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+ cstate->off_nl = 0;
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+ cstate->off_nl_nosnap = 0; /* no 802.2 LLC */
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+}
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+
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+static void
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+gen_batadv_offsets_v14(compiler_state_t *cstate, bpf_u_int32 type)
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+{
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+ size_t offset;
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+
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+ switch (type) {
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+ case BATADV_LEGACY_UNICAST: /* 0x03 */
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+ offset = sizeof(struct batadv_legacy_unicast_packet);
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+ break;
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+ case BATADV_LEGACY_BCAST: /* 0x04 */
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+ offset = sizeof(struct batadv_legacy_bcast_packet);
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+ break;
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+ case BATADV_LEGACY_UNICAST_FRAG: /* 0x06 */
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+ offset = sizeof(struct batadv_legacy_unicast_frag_packet);
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+ break;
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+ case BATADV_LEGACY_UNICAST_4ADDR: /* 0x09 */
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+ offset = sizeof(struct batadv_legacy_unicast_4addr_packet);
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+ break;
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+ case BATADV_LEGACY_CODED: /* 0x0a */
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+ offset = sizeof(struct batadv_legacy_coded_packet);
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+ break;
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+ default:
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+ offset = 0;
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+ }
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+
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+ if (offset)
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+ gen_batadv_push_offset(cstate, (u_int)offset);
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+}
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+
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+static void
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+gen_batadv_offsets_v15(compiler_state_t *cstate, bpf_u_int32 type)
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+{
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+ size_t offset;
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+
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+ switch (type) {
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+ case BATADV_BCAST: /* 0x01 */
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+ offset = sizeof(struct batadv_bcast_packet);
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+ break;
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+ case BATADV_CODED: /* 0x02 */
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+ offset = sizeof(struct batadv_coded_packet);
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+ break;
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+ case BATADV_UNICAST: /* 0x40 */
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+ offset = sizeof(struct batadv_unicast_packet);
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+ break;
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+ case BATADV_UNICAST_FRAG: /* 0x41 */
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+ offset = sizeof(struct batadv_frag_packet);
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+ break;
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+ case BATADV_UNICAST_4ADDR: /* 0x42 */
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+ offset = sizeof(struct batadv_unicast_4addr_packet);
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+ break;
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+ case BATADV_UNICAST_TVLV:
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+ /* unsupported for now, needs variable offset to
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+ * take tvlv_len into account
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+ */
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+ /* fall through */
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+ default:
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+ offset = 0;
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+ }
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+
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+ if (offset)
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+ gen_batadv_push_offset(cstate, (u_int)offset);
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+}
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+
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+static void
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+gen_batadv_offsets(compiler_state_t *cstate, bpf_u_int32 version, bpf_u_int32 type)
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+{
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+ switch (version) {
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+ case 14:
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+ gen_batadv_offsets_v14(cstate, type);
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+ break;
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+ case 15:
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+ gen_batadv_offsets_v15(cstate, type);
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+ break;
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+ default:
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+ break;
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+ }
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+}
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+
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+struct block *
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+gen_batadv(compiler_state_t *cstate, bpf_u_int32 version, int has_version,
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+ bpf_u_int32 type, int has_type)
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+{
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+ struct block *b0;
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+
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+ /*
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+ * Catch errors reported by us and routines below us, and return NULL
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+ * on an error.
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+ */
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+ if (setjmp(cstate->top_ctx))
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+ return (NULL);
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+
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+ b0 = gen_linktype(cstate, ETHERTYPE_BATMAN);
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+
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+ if (has_version)
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+ b0 = gen_batadv_check_version(cstate, b0, version);
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+
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+ if (has_type) {
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+ b0 = gen_batadv_check_type(cstate, b0, version, type);
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+ gen_batadv_offsets(cstate, version, type);
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+ }
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+
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+ return b0;
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+}
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+
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/* Check that the encapsulated frame has a link layer header
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* for Ethernet filters. */
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static struct block *
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--- a/gencode.h
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+++ b/gencode.h
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@@ -346,6 +346,9 @@ struct block *gen_pppoes(compiler_state_
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struct block *gen_geneve(compiler_state_t *, bpf_u_int32, int);
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+struct block *gen_batadv(compiler_state_t *, bpf_u_int32, int,
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+ bpf_u_int32, int);
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+
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struct block *gen_atmfield_code(compiler_state_t *, int, bpf_u_int32,
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int, int);
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struct block *gen_atmtype_abbrev(compiler_state_t *, int);
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--- a/grammar.y.in
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+++ b/grammar.y.in
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@@ -347,6 +347,7 @@ DIAG_OFF_BISON_BYACC
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%type <i> mtp2type
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%type <blk> mtp3field
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%type <blk> mtp3fieldvalue mtp3value mtp3listvalue
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+%type <rblk> pbatadv
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%token DST SRC HOST GATEWAY
|
||||
@@ -365,7 +366,7 @@ DIAG_OFF_BISON_BYACC
|
||||
%token LEN
|
||||
%token IPV6 ICMPV6 AH ESP
|
||||
%token VLAN MPLS
|
||||
-%token PPPOED PPPOES GENEVE
|
||||
+%token PPPOED PPPOES GENEVE BATADV
|
||||
%token ISO ESIS CLNP ISIS L1 L2 IIH LSP SNP CSNP PSNP
|
||||
%token STP
|
||||
%token IPX
|
||||
@@ -592,11 +593,40 @@ other: pqual TK_BROADCAST { CHECK_PTR_
|
||||
| PPPOES { CHECK_PTR_VAL(($$ = gen_pppoes(cstate, 0, 0))); }
|
||||
| GENEVE pnum { CHECK_PTR_VAL(($$ = gen_geneve(cstate, $2, 1))); }
|
||||
| GENEVE { CHECK_PTR_VAL(($$ = gen_geneve(cstate, 0, 0))); }
|
||||
+ | BATADV pbatadv { $$ = $2; }
|
||||
| pfvar { $$ = $1; }
|
||||
| pqual p80211 { $$ = $2; }
|
||||
| pllc { $$ = $1; }
|
||||
;
|
||||
|
||||
+pbatadv: { CHECK_PTR_VAL(($$ = gen_batadv(cstate, 0, 0, 0, 0))); }
|
||||
+ | pnum { CHECK_PTR_VAL(($$ = gen_batadv(cstate, $1, 1, 0, 0))); }
|
||||
+ | pnum pnum { CHECK_PTR_VAL(($$ = gen_batadv(cstate, $1, 1, $2, 1))); }
|
||||
+ | pnum ID
|
||||
+ {
|
||||
+ int type;
|
||||
+
|
||||
+ switch ($1) {
|
||||
+ case 14:
|
||||
+ type = pcap_nametobatadvtype_v14($2);
|
||||
+ break;
|
||||
+ case 15:
|
||||
+ type = pcap_nametobatadvtype_v15($2);
|
||||
+ break;
|
||||
+ default:
|
||||
+ bpf_set_error(cstate, "batman-adv compatibility version number %u unsupported", $1);
|
||||
+ YYABORT;
|
||||
+ }
|
||||
+
|
||||
+ if (type == PROTO_UNDEF) {
|
||||
+ bpf_set_error(cstate, "invalid batman-adv packet type value \"%s\"", $2);
|
||||
+ YYABORT;
|
||||
+ }
|
||||
+
|
||||
+ CHECK_PTR_VAL(($$ = gen_batadv(cstate, $1, 1, type, 1)));
|
||||
+ }
|
||||
+ ;
|
||||
+
|
||||
pfvar: PF_IFNAME ID { CHECK_PTR_VAL($2); CHECK_PTR_VAL(($$ = gen_pf_ifname(cstate, $2))); }
|
||||
| PF_RSET ID { CHECK_PTR_VAL($2); CHECK_PTR_VAL(($$ = gen_pf_ruleset(cstate, $2))); }
|
||||
| PF_RNR NUM { CHECK_PTR_VAL(($$ = gen_pf_rnr(cstate, $2))); }
|
||||
--- a/nametoaddr.c
|
||||
+++ b/nametoaddr.c
|
||||
@@ -136,8 +136,12 @@
|
||||
|
||||
#include "diag-control.h"
|
||||
|
||||
+#include "batadv_packet.h"
|
||||
+#include "batadv_legacy_packet.h"
|
||||
+
|
||||
#include "gencode.h"
|
||||
#include <pcap/namedb.h>
|
||||
+
|
||||
#include "nametoaddr.h"
|
||||
|
||||
#ifdef HAVE_OS_PROTO_H
|
||||
@@ -604,6 +608,7 @@ PCAP_API_DEF struct eproto eproto_db[] =
|
||||
{ "moprc", ETHERTYPE_MOPRC },
|
||||
{ "rarp", ETHERTYPE_REVARP },
|
||||
{ "sca", ETHERTYPE_SCA },
|
||||
+ { "batadv", ETHERTYPE_BATMAN },
|
||||
{ (char *)0, 0 }
|
||||
};
|
||||
|
||||
@@ -638,6 +643,60 @@ pcap_nametollc(const char *s)
|
||||
|
||||
while (p->s != 0) {
|
||||
if (strcmp(p->s, s) == 0)
|
||||
+ return p->p;
|
||||
+ p += 1;
|
||||
+ }
|
||||
+ return PROTO_UNDEF;
|
||||
+}
|
||||
+
|
||||
+/* Static data base of batman-adv v14 packet type values. */
|
||||
+static struct eproto batadv_type_db_v14[] = {
|
||||
+ { "iv_ogm", BATADV_LEGACY_IV_OGM },
|
||||
+ { "icmp", BATADV_LEGACY_ICMP },
|
||||
+ { "unicast", BATADV_LEGACY_UNICAST },
|
||||
+ { "bcast", BATADV_LEGACY_BCAST },
|
||||
+ { "vis", BATADV_LEGACY_VIS },
|
||||
+ { "unicast_frag", BATADV_LEGACY_UNICAST_FRAG },
|
||||
+ { "tt_query", BATADV_LEGACY_TT_QUERY },
|
||||
+ { "roam_adv", BATADV_LEGACY_ROAM_ADV },
|
||||
+ { "unicast_4addr", BATADV_LEGACY_UNICAST_4ADDR },
|
||||
+ { "coded", BATADV_LEGACY_CODED },
|
||||
+ { (char *)0, 0 }
|
||||
+};
|
||||
+
|
||||
+int pcap_nametobatadvtype_v14(const char *s)
|
||||
+{
|
||||
+ struct eproto *p = batadv_type_db_v14;
|
||||
+
|
||||
+ while (p->s != 0) {
|
||||
+ if (strcmp(p->s, s) == 0)
|
||||
+ return p->p;
|
||||
+ p += 1;
|
||||
+ }
|
||||
+ return PROTO_UNDEF;
|
||||
+}
|
||||
+
|
||||
+/* Static data base of batman-adv v15 packet type values. */
|
||||
+static struct eproto batadv_type_db_v15[] = {
|
||||
+ { "iv_ogm", BATADV_IV_OGM },
|
||||
+ { "bcast", BATADV_BCAST },
|
||||
+ { "coded", BATADV_CODED },
|
||||
+ { "elp", BATADV_ELP },
|
||||
+ { "ogm2", BATADV_OGM2 },
|
||||
+ { "unicast", BATADV_UNICAST },
|
||||
+ { "unicast_frag", BATADV_UNICAST_FRAG },
|
||||
+ { "unicast_4addr", BATADV_UNICAST_4ADDR },
|
||||
+ { "icmp", BATADV_ICMP },
|
||||
+ { "unicast_tvlv", BATADV_UNICAST_TVLV },
|
||||
+ { (char *)0, 0 }
|
||||
+};
|
||||
+
|
||||
+int pcap_nametobatadvtype_v15(const char *s)
|
||||
+{
|
||||
+ struct eproto *p = batadv_type_db_v15;
|
||||
+
|
||||
+ while (p->s != 0) {
|
||||
+ if (strcmp(p->s, s) == 0)
|
||||
return p->p;
|
||||
p += 1;
|
||||
}
|
||||
--- a/pcap-filter.manmisc.in
|
||||
+++ b/pcap-filter.manmisc.in
|
||||
@@ -98,6 +98,7 @@ protos are:
|
||||
.BR arp ,
|
||||
.BR rarp ,
|
||||
.BR decnet ,
|
||||
+.BR batadv ,
|
||||
.B tcp
|
||||
and
|
||||
.BR udp .
|
||||
@@ -361,7 +362,7 @@ True if the packet is an IPv6 multicast
|
||||
.IP "\fBether proto \fIprotocol\fR"
|
||||
True if the packet is of ether type \fIprotocol\fR.
|
||||
\fIProtocol\fP can be a number or one of the names
|
||||
-\fBaarp\fP, \fBarp\fP, \fBatalk\fP, \fBdecnet\fP, \fBip\fP, \fBip6\fP,
|
||||
+\fBaarp\fP, \fBarp\fP, \fBatalk\fP, \fBbatadv\fP, \fBdecnet\fP, \fBip\fP, \fBip6\fP,
|
||||
\fBipx\fP, \fBiso\fP, \fBlat\fP, \fBloopback\fP, \fBmopdl\fP, \fBmoprc\fP, \fBnetbeui\fP,
|
||||
\fBrarp\fP, \fBsca\fP or \fBstp\fP.
|
||||
Note these identifiers (except \fBloopback\fP) are also keywords
|
||||
@@ -415,7 +416,7 @@ the filter checks for the IPX etype in a
|
||||
DSAP in the LLC header, the 802.3-with-no-LLC-header encapsulation of
|
||||
IPX, and the IPX etype in a SNAP frame.
|
||||
.RE
|
||||
-.IP "\fBip\fR, \fBip6\fR, \fBarp\fR, \fBrarp\fR, \fBatalk\fR, \fBaarp\fR, \fBdecnet\fR, \fBiso\fR, \fBstp\fR, \fBipx\fR, \fBnetbeui\fP"
|
||||
+.IP "\fBip\fR, \fBip6\fR, \fBarp\fR, \fBrarp\fR, \fBatalk\fR, \fBaarp\fR, \fBdecnet\fR, \fBiso\fR, \fBstp\fR, \fBipx\fR, \fBnetbeui\fP, \fBbatadv\fP"
|
||||
Abbreviations for:
|
||||
.in +.5i
|
||||
.nf
|
||||
@@ -752,6 +753,36 @@ For example:
|
||||
filters IPv4 protocol encapsulated in Geneve with VNI 0xb. This will
|
||||
match both IPv4 directly encapsulated in Geneve as well as IPv4 contained
|
||||
inside an Ethernet frame.
|
||||
+.IP "\fBbatadv \fI[version] \fI[type]\fR"
|
||||
+True if the packet is a B.A.T.M.A.N. Advanced packet (Ethernet type 0x4305).
|
||||
+If the optional \fIversion\fR is specified, only true if the packet has the
|
||||
+specified batman-adv compatibility \fIversion\fR. If the optional \fIversion\fR
|
||||
+and \fItype\fR are specified, only true if the packet has both the specified
|
||||
+batman-adv compatibility \fIversion\fR and batman-adv packet \fItype\fR.
|
||||
+.IP
|
||||
+\fIversion\fR may be a number from 0 to 255, though only compatibility version
|
||||
+14 and 15 were actually deployed in the wild. Version 15 is the current version,
|
||||
+14 is considered deprecated.
|
||||
+.IP
|
||||
+\fItype\fR is currently only defined for compatibility \fIversion\fR 14 and 15.
|
||||
+\fItype\fR may be a number from 0 to 255 for compatibility \fIversion\fR 14 and 15.
|
||||
+.IP
|
||||
+The following packet \fItype\fR aliases are available for compat \fIversion\fR 14:
|
||||
+\fBiv_ogm\fP, \fBicmp\fP, \fBunicast\fP, \fBbcast\fP, \fBvis\fP, \fBunicast-frag\fP,
|
||||
+\fBtt_query\fP, \fBroam_adv\fP, \fBunicast_4addr\fP, \fPcoded\fP.
|
||||
+.IP
|
||||
+The following packet \fItype\fR aliases are available for compat \fIversion\fR 15:
|
||||
+\fBiv_ogm\fP, \fBbcast\fP, \fBcoded\fP, \fBelp\fP, \fBogm2\fP, \fBunicast\fP,
|
||||
+\fBunicast_frag\fP, \fBunicast_4addr\fP, \fBicmp\fP, \fPunicast_tvlv\fP.
|
||||
+.IP
|
||||
+Note that when the \fBbatadv\fR keyword is encountered in an expression and
|
||||
+a batman-adv packet \fItype\fR is provided which specifies an encapsulating
|
||||
+packet type then it changes the decoding offsets for the remainder of the
|
||||
+expression on the assumption that the packet is a batman-adv packet. For compat
|
||||
+\fIversion\fR 14 these are packet \fItype\fRs \fBunicast\fP, \fBbcast\fP,
|
||||
+\fBunicast_frag\fP, \fBunicast_4addr\fP and \fBcoded\fP. For compat \fIversion\fR
|
||||
+15 these are currently packet \fItype\fRs \fBbcast\fP, \fBcoded\fP, \fBunicast\fP,
|
||||
+\fBunicast_frag\fP and \fBunicast_4addr\fP.
|
||||
.IP "\fBiso proto \fIprotocol\fR"
|
||||
True if the packet is an OSI packet of protocol type \fIprotocol\fP.
|
||||
\fIProtocol\fP can be a number or one of the names
|
||||
--- a/pcap/namedb.h
|
||||
+++ b/pcap/namedb.h
|
||||
@@ -69,6 +69,8 @@ PCAP_API int pcap_nametoportrange(const
|
||||
PCAP_API int pcap_nametoproto(const char *);
|
||||
PCAP_API int pcap_nametoeproto(const char *);
|
||||
PCAP_API int pcap_nametollc(const char *);
|
||||
+PCAP_API int pcap_nametobatadvtype_v14(const char *);
|
||||
+PCAP_API int pcap_nametobatadvtype_v15(const char *);
|
||||
/*
|
||||
* If a protocol is unknown, PROTO_UNDEF is returned.
|
||||
* Also, pcap_nametoport() returns the protocol along with the port number.
|
||||
--- a/scanner.l
|
||||
+++ b/scanner.l
|
||||
@@ -344,6 +344,7 @@ mpls return MPLS;
|
||||
pppoed return PPPOED;
|
||||
pppoes return PPPOES;
|
||||
geneve return GENEVE;
|
||||
+batadv return BATADV;
|
||||
|
||||
lane return LANE;
|
||||
llc return LLC;
|
||||
Loading…
Reference in New Issue
Block a user