/* not a policy according to specs */
static int rcv_nack_ctl(struct dtcp * dtcp,
struct pdu * pdu)
{
struct rtxq * q;
struct dtcp_ps * ps;
seq_num_t seq_num;
struct pci * pci;
pci = pdu_pci_get_rw(pdu);
seq_num = pci_control_ack_seq_num(pci);
rcu_read_lock();
ps = container_of(rcu_dereference(dtcp->base.ps),
struct dtcp_ps, base);
if (ps->rtx_ctrl) {
q = dt_rtxq(dtcp->parent);
if (!q) {
rcu_read_unlock();
LOG_ERR("Couldn't find the Retransmission queue");
return -1;
}
rtxq_nack(q, seq_num, dt_sv_tr(dtcp->parent));
if (ps->rtt_estimator)
ps->rtt_estimator(ps, pci_control_ack_seq_num(pci));
}
rcu_read_unlock();
LOG_DBG("DTCP received NACK (CPU: %d)", smp_processor_id());
dump_we(dtcp, pci);
pdu_destroy(pdu);
return 0;
}
static int rcv_ack(struct dtcp * dtcp,
struct pdu * pdu)
{
struct dtcp_ps * ps;
seq_num_t seq;
int ret;
struct pci * pci;
ASSERT(dtcp);
ASSERT(pdu);
pci = pdu_pci_get_rw(pdu);
ASSERT(pci);
seq = pci_control_ack_seq_num(pci);
rcu_read_lock();
ps = container_of(rcu_dereference(dtcp->base.ps),
struct dtcp_ps, base);
ret = ps->sender_ack(ps, seq);
if (ps->rtt_estimator)
ps->rtt_estimator(ps, pci_control_ack_seq_num(pci));
rcu_read_unlock();
LOG_DBG("DTCP received ACK (CPU: %d)", smp_processor_id());
dump_we(dtcp, pci);
pdu_destroy(pdu);
return ret;
}
static int rcv_ack_and_flow_ctl(struct dtcp * dtcp,
struct pdu * pdu)
{
struct dtcp_ps * ps;
seq_num_t seq;
struct pci * pci;
ASSERT(dtcp);
pci = pdu_pci_get_rw(pdu);
ASSERT(pci);
LOG_DBG("Updating Window Edges for DTCP: %pK", dtcp);
seq = pci_control_ack_seq_num(pci);
rcu_read_lock();
ps = container_of(rcu_dereference(dtcp->base.ps),
struct dtcp_ps, base);
/* This updates sender LWE */
if (ps->sender_ack(ps, seq))
LOG_ERR("Could not update RTXQ and LWE");
if (ps->rtx_ctrl && ps->rtt_estimator)
ps->rtt_estimator(ps, pci_control_ack_seq_num(pci));
rcu_read_unlock();
snd_rt_wind_edge_set(dtcp, pci_control_new_rt_wind_edge(pci));
LOG_DBG("Right Window Edge: %u", snd_rt_wind_edge(dtcp));
LOG_DBG("Calling CWQ_deliver for DTCP: %pK", dtcp);
push_pdus_rmt(dtcp);
/* FIXME: Verify values for the receiver side */
LOG_DBG("DTCP received ACK-FC (CPU: %d)", smp_processor_id());
dump_we(dtcp, pci);
pdu_destroy(pdu);
return 0;
}
static int serialize_ack_pci(const struct serdes * instance,
char * data,
const struct pci * pci,
int offset)
{
seq_num_t ack_seq;
struct dt_cons * dt_cons;
ASSERT(instance);
ASSERT(data);
ASSERT(pci);
ASSERT(offset);
dt_cons = instance->dt_cons;
ASSERT(dt_cons);
ack_seq = pci_control_ack_seq_num(pci);
memcpy(data + offset, &ack_seq, dt_cons->seq_num_length);
return 0;
}
void dump_we(struct dtcp * dtcp, struct pci * pci)
{
struct dtp * dtp;
seq_num_t snd_rt_we;
seq_num_t snd_lf_we;
seq_num_t rcv_rt_we;
seq_num_t rcv_lf_we;
seq_num_t new_rt_we;
seq_num_t new_lf_we;
seq_num_t pci_seqn;
seq_num_t my_rt_we;
seq_num_t my_lf_we;
seq_num_t ack;
ASSERT(dtcp);
ASSERT(pci);
dtp = dt_dtp(dtcp->parent);
ASSERT(dtp);
snd_rt_we = snd_rt_wind_edge(dtcp);
snd_lf_we = dtcp_snd_lf_win(dtcp);
rcv_rt_we = rcvr_rt_wind_edge(dtcp);
rcv_lf_we = dt_sv_rcv_lft_win(dtcp->parent);
new_rt_we = pci_control_new_rt_wind_edge(pci);
new_lf_we = pci_control_new_left_wind_edge(pci);
my_lf_we = pci_control_my_left_wind_edge(pci);
my_rt_we = pci_control_my_rt_wind_edge(pci);
pci_seqn = pci_sequence_number_get(pci);
ack = pci_control_ack_seq_num(pci);
LOG_DBG("SEQN: %u N/Ack: %u SndRWE: %u SndLWE: %u "
"RcvRWE: %u RcvLWE: %u "
"newRWE: %u newLWE: %u "
"myRWE: %u myLWE: %u",
pci_seqn, ack, snd_rt_we, snd_lf_we, rcv_rt_we, rcv_lf_we,
new_rt_we, new_lf_we, my_rt_we, my_lf_we);
}