4096 /* * snd_recover * it's basically same as the "recover" variable in RFC 2852 (NewReno). * when entering fast retransmit, it's set to snd_max. * newreno uses this to detect partial ack. * snd_high * it's basically same as the "send_high" variable in RFC 2852 (NewReno). * on each RTO, it's set to snd_max. * newreno uses this to avoid false fast retransmits. */