On May 19, 2011, at 3:33 PM, Tim Sammut wrote: > I have a small tool that uses pcap_inject to send ethernet frames on > specific host interfaces. When injecting on a 802.1q virtual interface > on Solaris the frame is ultimately transmitted without the 802.1q header > that should have been add by the host OS. This is Solaris 10 on SPARC > with libpcap 1.1.1, and the same scenario works perfectly on Linux. > > Is this something that should work on Solaris too?
Ultimately, libpcap depends on the OS to provide raw packet capture and injection capabilities. If the Solaris networking stack allows a DLPI device bound to a VLAN interface to have packets handed to it with a full Ethernet header and to use the Ethernet header but add in the appropriate VLAN header, by doing, for example, a special ioctl - and either that ioctl is harmless on other interfaces or libpcap can somehow determine whether it needs to make that ioctl - then libpcap could (and should) be changed to do that. If the Solaris networking stack doesn't allow that, you're out of luck - you might have to open the hardware interface, construct the packets complete with VLAN header, and send the packets out on that. I don't know which of those is the case; a quick look at the Sun^WOracle documentation didn't find anything obvious. - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
