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55 lines
1.6 KiB
55 lines
1.6 KiB
From d8d7143f1c0ca5a36f7d1f1092d360afbf4e71d3 Mon Sep 17 00:00:00 2001 |
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From: rpm-build <rpm-build> |
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Date: Mon, 20 Oct 2014 13:26:38 +0200 |
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Subject: [PATCH 06/13] Introduce -nn option |
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This changes the semantics on -n option so only namelookups are skipped. Port |
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numbers *are* translated to their string representations. Option -nn then has |
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the same semantics as -n had originally. |
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--- |
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addrtoname.c | 4 ++-- |
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tcpdump.1.in | 6 +++++- |
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2 files changed, 7 insertions(+), 3 deletions(-) |
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diff --git a/addrtoname.c b/addrtoname.c |
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index a1e360d..f8e777c 100644 |
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--- a/addrtoname.c |
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+++ b/addrtoname.c |
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@@ -822,7 +822,7 @@ init_servarray(netdissect_options *ndo) |
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while (table->name) |
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table = table->nxt; |
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- if (ndo->ndo_nflag) { |
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+ if (ndo->ndo_nflag > 1) { |
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(void)snprintf(buf, sizeof(buf), "%d", port); |
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table->name = strdup(buf); |
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} else |
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@@ -1245,7 +1245,7 @@ init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask) |
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f_localnet = localnet; |
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f_netmask = mask; |
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} |
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- if (ndo->ndo_nflag) |
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+ if (ndo->ndo_nflag > 1) |
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/* |
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* Simplest way to suppress names. |
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*/ |
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diff --git a/tcpdump.1.in b/tcpdump.1.in |
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index 081e5d1..f233934 100644 |
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--- a/tcpdump.1.in |
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+++ b/tcpdump.1.in |
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@@ -544,7 +544,11 @@ Use \fIsecret\fP as a shared secret for validating the digests found in |
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TCP segments with the TCP-MD5 option (RFC 2385), if present. |
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.TP |
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.B \-n |
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-Don't convert addresses (i.e., host addresses, port numbers, etc.) to names. |
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+Don't convert host addresses to names. This can be used to avoid |
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+DNS lookups. |
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+.TP |
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+.B \-nn |
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+Don't convert protocol and port numbers etc. to names either. |
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.TP |
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.B \-N |
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Don't print domain name qualification of host names. |
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-- |
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2.13.5 |
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