search for: tcp_option_nop

...> > 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->tsopt.tsecr = ntohl ( tcp->ts_recent ); > } > > (When opening the connection, the...

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

...sn'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->tsopt.tsecr = ntohl ( tcp->ts_recent ); } (When opening the connection, the TCP_SYN flag is set (from tcp_ope...