search for: tcp_syn

.... 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 ); > tsopt->tsopt.tsval = ntohl...

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

...ed. 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 ); tsopt->tsopt.tsval = ntohl ( currticks() ); tsopt-...