PERFORCE change 35474 for review

[Robert Watson]

http://perforce.freebsd.org/chv.cgi?CH=35474

Change 35474 by rwatson at rwatson_tislabs on 2003/08/04 07:36:15

	Expand the annotation for ip_output(): in the IP forwarding
	case, the options will already be in the IP header of (m), so
	the opt pointer must be NULL (we can't insert options into
	a packet that already holds options).

Affected files ...

.. //depot/projects/trustedbsd/mac/sys/netinet/ip_output.c#29 edit

Differences ...

==== //depot/projects/trustedbsd/mac/sys/netinet/ip_output.c#29 (text+ko) ====

@@ -118,10 +118,12 @@
 extern	struct protosw inetsw[];
 
 /*
- * IP output.  The packet in mbuf chain m contains a skeletal IP
- * header (with len, off, ttl, proto, tos, src, dst).
+ * IP output.  The packet in mbuf chain m contains a skeletal IP header (with
+ * len, off, ttl, proto, tos, src, dst).
  * The mbuf chain containing the packet will be freed.
- * The mbuf opt, if present, will not be freed.
+ * The mbuf opt, if present, will not be freed.  In the IP forwarding
+ * case, the packet will arrive with options already inserted, so must
+ * have a NULL opt pointer.
  */
 int
 ip_output(m0, opt, ro, flags, imo, inp)
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