search for: tcp_xmit

On Tue, 7 Apr 2015, Laszlo Ersek wrote: > Whereas syslinux.efi apparently uses the embedded gpxe/ tree, and that > one uses TCP timestamps. See tcp_xmit() in gpxe/src/net/tcp.c: Actually syslinux.efi seems to be using the implementation calling into UEFI via these functions: http://git.kernel.org/cgit/boot/syslinux/syslinux.git/tree/efi/tcp.c I've tried to add debug messages to these functions and got the following: core_tcp_connect: conne...

Hello, I'm trying to find out how to pxe boot with syslinux.efi on QEMU with OVMF. After getting through the initial hurdle caused by the iPXE based option ROM included with QEMU having a problem as described in these threads: http://www.syslinux.org/archives/2014-November/022804.html http://sourceforge.net/p/edk2/mailman/message/33236100/ I'm now getting further to almost being able

...ue, 7 Apr 2015, Laszlo Ersek wrote: > As far as I can see (... well, guess), lpxelinux.0 uses the TCP > implementation under core/lwip/, which doesn't support TCP timestamps. > > Whereas syslinux.efi apparently uses the embedded gpxe/ tree, and that > one uses TCP timestamps. See tcp_xmit() in gpxe/src/net/tcp.c: > > if ( ( flags & TCP_SYN ) || tcp->timestamps ) { > tsopt = iob_push ( iobuf, sizeof ( *tsopt ) ); > memset ( tsopt->nop, TCP_OPTION_NOP, sizeof ( tsopt->nop ) ); > tsopt->tsopt.kind = TCP_OPTION_TS; > tsopt->tsopt.length = si...

...are related.) > > Any help is greatly appreciated. As far as I can see (... well, guess), lpxelinux.0 uses the TCP implementation under core/lwip/, which doesn't support TCP timestamps. Whereas syslinux.efi apparently uses the embedded gpxe/ tree, and that one uses TCP timestamps. See tcp_xmit() in gpxe/src/net/tcp.c: if ( ( flags & TCP_SYN ) || tcp->timestamps ) { tsopt = iob_push ( iobuf, sizeof ( *tsopt ) ); memset ( tsopt->nop, TCP_OPTION_NOP, sizeof ( tsopt->nop ) ); tsopt->tsopt.kind = TCP_OPTION_TS; tsopt->tsopt.length = sizeof ( tsopt->tsopt ); t...