Hi Mats,
I agree with you. In fact, function drop(p) will check whether the packet is in used before dropping it. But the function drop(p) only exists for an NsObject. Objects not derived from class NsObject may not define this function. If you guys would like to use Packet::free(p), you are responsible for consistency check. Failing to do so may result in errors like segmentation fault. Best, Teerawat On 3/13/2009, "Mats Folke" <mats.fo...@ericsson.com> wrote: > >Hi! > >Wouldn't it be kind of dangerous to drop the packet using the first method >described? The packet would jsut disappear and the logs would not be >consistent. I would recommend using the latter method > >drop(p) > >instead. This makes the logging consistent and almost all objects I've come >across where I would like to drop packets have been Connector objects. > >Best regards, >Mats Folke > >Teerawat Issariyakul wrote: >> Hi, >> >> Suppose you have a pointer "p". You can drop the packet by executing >> >> >> Packet::free(p) >> >> Also the packet "*p" can be dropped from within the Connector object >> by invoking function drop as follows: >> >> drop(p); >> >> >> Note that "drop(p)" is a function of class Connector, and therefore >> must be invoked from within the scope of class Connector. >> >> I posted how to drop a a packet in the following blog: >> >> http://t-issariyakul.blogspot.com/2009/03/ns2-dropping-packet.html >> >> For more information about Connector and Packet, see Chapters 5 and 8, >> respectively, in the following book from Springer: >> >> T. Issaraiyakul and E. Hossain, "Introduction to Network Simulator >> NS2", Springer 2008. >> http://www.springer.com/engineering/signals/book/978-0-387-71759-3 >> >> You may also find the following website useful: >> http://www.ece.ubc.ca/~teerawat/NS2.htm >> >> On 3/13/2009, "muralikrishna g" <muralikrishn...@gmail.com> wrote: >> >>> >>> Hi to all.. >>> >>> i am using ns-2.33, here in my work i have to drop packets from a >>> particular sender, i am planing to drop packets depending on the >>> sender node_id >>> >>> please help me regarding this.. >>> >>> by >>> >>> Muralikrishna Gaddam (muralikrishn...@gmail.com) > > > >-- >Mats Folke, M.Sc., Lic.Eng. >Research Engineer > >Ericsson AB Office: +46 10 7171385 >Ericsson Research Fax: +46 920 99621 >P.O. Box 920 Mobile: +46 76 1271385 >SE-971 28 Luleå >Sweden >
