38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
diff -up tcpdump-3.9.8/addrtoname.c.portnumbers tcpdump-3.9.8/addrtoname.c
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--- tcpdump-3.9.8/addrtoname.c.portnumbers 2007-09-26 03:59:52.000000000 +0200
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+++ tcpdump-3.9.8/addrtoname.c 2008-08-29 13:53:12.000000000 +0200
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@@ -704,7 +704,7 @@ init_servarray(void)
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while (table->name)
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table = table->nxt;
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- if (nflag) {
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+ if (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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@@ -1104,7 +1104,7 @@ init_addrtoname(u_int32_t localnet, u_in
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f_localnet = localnet;
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f_netmask = mask;
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}
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- if (nflag)
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+ if (nflag > 1)
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/*
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* Simplest way to suppress names.
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*/
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diff -up tcpdump-3.9.8/tcpdump.1.portnumbers tcpdump-3.9.8/tcpdump.1
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--- tcpdump-3.9.8/tcpdump.1.in.portnumbers 2008-08-29 13:53:12.000000000 +0200
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+++ tcpdump-3.9.8/tcpdump.1.in 2008-08-29 13:53:12.000000000 +0200
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@@ -403,7 +403,11 @@ Use \fIsecret\fP as a shared secret for
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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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