/*
* Called when a connection is established to translate the TCP options
* reported by HW to FreeBSD's native format.
*/
static void
assign_rxopt(struct tcpcb *tp, unsigned int opt)
{
struct toepcb *toep = tp->t_toe;
struct adapter *sc = td_adapter(toep->td);
INP_LOCK_ASSERT(tp->t_inpcb);
tp->t_maxseg = tp->t_maxopd = sc->params.mtus[G_TCPOPT_MSS(opt)] - 40;
if (G_TCPOPT_TSTAMP(opt)) {
tp->t_flags |= TF_RCVD_TSTMP; /* timestamps ok */
tp->ts_recent = 0; /* hmmm */
tp->ts_recent_age = tcp_ts_getticks();
tp->t_maxseg -= TCPOLEN_TSTAMP_APPA;
}
if (G_TCPOPT_SACK(opt))
tp->t_flags |= TF_SACK_PERMIT; /* should already be set */
else
tp->t_flags &= ~TF_SACK_PERMIT; /* sack disallowed by peer */
if (G_TCPOPT_WSCALE_OK(opt))
tp->t_flags |= TF_RCVD_SCALE;
/* Doing window scaling? */
if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) ==
(TF_RCVD_SCALE | TF_REQ_SCALE)) {
tp->rcv_scale = tp->request_r_scale;
tp->snd_scale = G_TCPOPT_SND_WSCALE(opt);
}
}
static void set_emss(struct iwch_ep *ep, u16 opt)
{
PDBG("%s ep %p opt %u\n", __func__, ep, opt);
ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
if (G_TCPOPT_TSTAMP(opt))
ep->emss -= 12;
if (ep->emss < 128)
ep->emss = 128;
PDBG("emss=%d\n", ep->emss);
}
/*
* Called when a connection is established to translate the TCP options
* reported by HW to FreeBSD's native format.
*/
static void
assign_rxopt(struct tcpcb *tp, unsigned int opt)
{
struct toepcb *toep = tp->t_toe;
struct inpcb *inp = tp->t_inpcb;
struct adapter *sc = td_adapter(toep->td);
int n;
INP_LOCK_ASSERT(inp);
if (inp->inp_inc.inc_flags & INC_ISIPV6)
n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
else
n = sizeof(struct ip) + sizeof(struct tcphdr);
tp->t_maxseg = sc->params.mtus[G_TCPOPT_MSS(opt)] - n;
CTR4(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u)", __func__, toep->tid,
G_TCPOPT_MSS(opt), sc->params.mtus[G_TCPOPT_MSS(opt)]);
if (G_TCPOPT_TSTAMP(opt)) {
tp->t_flags |= TF_RCVD_TSTMP; /* timestamps ok */
tp->ts_recent = 0; /* hmmm */
tp->ts_recent_age = tcp_ts_getsbintime();
tp->t_maxseg -= TCPOLEN_TSTAMP_APPA;
}
if (G_TCPOPT_SACK(opt))
tp->t_flags |= TF_SACK_PERMIT; /* should already be set */
else
tp->t_flags &= ~TF_SACK_PERMIT; /* sack disallowed by peer */
if (G_TCPOPT_WSCALE_OK(opt))
tp->t_flags |= TF_RCVD_SCALE;
/* Doing window scaling? */
if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) ==
(TF_RCVD_SCALE | TF_REQ_SCALE)) {
tp->rcv_scale = tp->request_r_scale;
tp->snd_scale = G_TCPOPT_SND_WSCALE(opt);
}
}