// RFC 5681 fast recovery
debug(c, "fast recovery started\n", c->dupack);
uint32_t flightsize = seqdiff(c->snd.nxt, c->snd.una);
// RFC 5681 fast recovery
debug(c, "fast recovery started\n", c->dupack);
uint32_t flightsize = seqdiff(c->snd.nxt, c->snd.una);