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42 lines
1.0 KiB
42 lines
1.0 KiB
7 years ago
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From 676cf8a61ed240d0a86d471ef419f45ba35dba80 Mon Sep 17 00:00:00 2001
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From: Denis Ovsienko <infrastation@yandex.ru>
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Date: Thu, 5 Dec 2013 14:54:14 +0400
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Subject: [PATCH] NFLOG: don't crash trying to filter at link layer
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Before:
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@ tcpdump -i nflog icmp
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tcpdump: WARNING: SIOCGIFADDR: nflog: No such device
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Aborted (core dumped)
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After:
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@ tcpdump -i nflog icmp
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tcpdump: WARNING: SIOCGIFADDR: nflog: No such device
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tcpdump: NFLOG link-layer type filtering not implemented
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---
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gencode.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/gencode.c b/gencode.c
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index 7bb07fb..d58ea30 100644
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--- a/gencode.c
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+++ b/gencode.c
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@@ -3410,6 +3410,13 @@ gen_linktype(proto)
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case DLT_AX25_KISS:
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bpf_error("AX.25 link-layer type filtering not implemented");
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+
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+ case DLT_NFLOG:
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+ /* Using the fixed-size NFLOG header it is possible to tell only
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+ * the address family of the packet, other meaningful data is
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+ * either missing or behind TLVs.
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+ */
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+ bpf_error("NFLOG link-layer type filtering not implemented");
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}
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/*
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--
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1.8.4.2
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