[Ns-bugs] [Bug 136] New: Sockets bound to specific interfaces receive broadcasts arriving on other interfaces

[bugzilla-daemon@nsnam-www.ece.gatech.edu]

http://www.nsnam.org/bugzilla/show_bug.cgi?id=136

           Summary: Sockets bound to specific interfaces receive broadcasts
                    arriving on other interfaces
           Product: ns-3
           Version: pre-release
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P3
         Component: internet-node
        AssignedTo: ns-bugs at isi.edu
        ReportedBy: gjcarneiro at gmail.com


here's a simple diagram

              <----- broadcast
   / 10.0.0.1 --------------------- 10.0.0.2
  /                                         \
N1                                           N2
  \
   \ 10.0.1.1


Suppose N1 has two sockets, one bound to one interface, another bound to
another interface (Bind (interface-ipv4-address)).  When N2 sends a broadcast
packet to N1, currently both sockets in N1 are receiving a copy, which is
wrong.  That should only happen when using sockets bound to the "any" address,
not like this.

Yes, this is partly my fault (bug 51) but there is a subtle distinction between
multiple sockets receiving a broadcast packet when they are bound to the "any"
address and the case where all sockets are bound to specific interface
addresses.  Both scenarios have their uses and should be supported.


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