#include <vnet/tcp/tcp.h>
#include <vnet/session/session.h>
#include <vnet/fib/fib.h>
+#include <vnet/dpo/load_balance.h>
#include <math.h>
tcp_main_t tcp_main;
tcp_connection_unbind (u32 listener_index)
{
tcp_main_t *tm = vnet_get_tcp_main ();
- TCP_EVT_DBG (TCP_EVT_UNBIND,
- pool_elt_at_index (tm->listener_pool, listener_index));
+ tcp_connection_t *tc;
+
+ tc = pool_elt_at_index (tm->listener_pool, listener_index);
+
+ TCP_EVT_DBG (TCP_EVT_UNBIND, tc);
+
+ /* Poison the entry */
+ if (CLIB_DEBUG > 0)
+ memset (tc, 0xFA, sizeof (*tc));
+
pool_put_index (tm->listener_pool, listener_index);
}
/* Check if half-open */
if (tc->state == TCP_STATE_SYN_SENT)
- pool_put (tm->half_open_connections, tc);
+ {
+ /* Poison the entry */
+ if (CLIB_DEBUG > 0)
+ memset (tc, 0xFA, sizeof (*tc));
+ pool_put (tm->half_open_connections, tc);
+ }
else
- pool_put (tm->connections[tc->c_thread_index], tc);
+ {
+ int thread_index = tc->c_thread_index;
+ /* Poison the entry */
+ if (CLIB_DEBUG > 0)
+ memset (tc, 0xFA, sizeof (*tc));
+ pool_put (tm->connections[thread_index], tc);
+ }
}
/**
tcp_connection_cleanup (tc);
}
+/**
+ * Cleanup half-open connection
+ */
+void
+tcp_half_open_connection_del (tcp_connection_t * tc)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ if (CLIB_DEBUG)
+ memset (tc, 0xFA, sizeof (*tc));
+ clib_spinlock_lock (&tm->half_open_lock);
+ pool_put (tm->half_open_connections, tc);
+ clib_spinlock_unlock (&tm->half_open_lock);
+}
+
+tcp_connection_t *
+tcp_connection_new (u8 thread_index)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ tcp_connection_t *tc;
+
+ pool_get (tm->connections[thread_index], tc);
+ memset (tc, 0, sizeof (*tc));
+ tc->c_c_index = tc - tm->connections[thread_index];
+ tc->c_thread_index = thread_index;
+ return tc;
+}
+
/** Notify session that connection has been reset.
*
* Switch state to closed and wait for session to call cleanup.
void
tcp_connection_reset (tcp_connection_t * tc)
{
- if (tc->state == TCP_STATE_CLOSED)
- return;
-
- tc->state = TCP_STATE_CLOSED;
- stream_session_reset_notify (&tc->connection);
+ TCP_EVT_DBG (TCP_EVT_RST_RCVD, tc);
+ switch (tc->state)
+ {
+ case TCP_STATE_SYN_RCVD:
+ /* Cleanup everything. App wasn't notified yet */
+ stream_session_delete_notify (&tc->connection);
+ tcp_connection_cleanup (tc);
+ break;
+ case TCP_STATE_SYN_SENT:
+ /* XXX remove sst from call */
+ stream_session_connect_notify (&tc->connection, tc->connection.proto,
+ 1 /* fail */ );
+ tcp_connection_cleanup (tc);
+ break;
+ case TCP_STATE_ESTABLISHED:
+ case TCP_STATE_CLOSE_WAIT:
+ case TCP_STATE_FIN_WAIT_1:
+ case TCP_STATE_FIN_WAIT_2:
+ case TCP_STATE_CLOSING:
+ tc->state = TCP_STATE_CLOSED;
+ TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
+
+ /* Make sure all timers are cleared */
+ tcp_connection_timers_reset (tc);
+ stream_session_reset_notify (&tc->connection);
+
+ /* Wait for cleanup from session layer but not forever */
+ tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME);
+ break;
+ case TCP_STATE_CLOSED:
+ return;
+ }
}
/**
TCP_EVT_DBG (TCP_EVT_CLOSE, tc);
/* Send FIN if needed */
- if (tc->state == TCP_STATE_ESTABLISHED || tc->state == TCP_STATE_SYN_RCVD
- || tc->state == TCP_STATE_CLOSE_WAIT)
+ if (tc->state == TCP_STATE_ESTABLISHED
+ || tc->state == TCP_STATE_SYN_RCVD || tc->state == TCP_STATE_CLOSE_WAIT)
tcp_send_fin (tc);
/* Switch state */
tc->state = TCP_STATE_CLOSED;
else if (tc->state == TCP_STATE_CLOSE_WAIT)
tc->state = TCP_STATE_LAST_ACK;
+ TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
/* If in CLOSED and WAITCLOSE timer is not set, delete connection now */
if (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID
/* Wait for the session tx events to clear */
tc->state = TCP_STATE_CLOSED;
+ TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME);
}
* Allocate local port and add if successful add entry to local endpoint
* table to mark the pair as used.
*/
-u16
+int
tcp_allocate_local_port (tcp_main_t * tm, ip46_address_t * ip)
{
transport_endpoint_t *tep;
tries = max - min;
time_now = tcp_time_now ();
+ /* Only support active opens from thread 0 */
+ ASSERT (vlib_get_thread_index () == 0);
+
/* Start at random point or max */
pool_get (tm->local_endpoints, tep);
clib_memcpy (&tep->ip, ip, sizeof (*ip));
}
}
+#if 0
+typedef struct ip4_tcp_hdr
+{
+ ip4_header_t ip;
+ tcp_header_t tcp;
+} ip4_tcp_hdr_t;
+
+typedef struct ip6_tcp_hdr
+{
+ ip6_header_t ip;
+ tcp_header_t tcp;
+} ip6_tcp_hdr_t;
+
+static void
+tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo,
+ dpo_id_t * result)
+{
+ const dpo_id_t *choice;
+ load_balance_t *lb;
+ int hash;
+
+ lb = load_balance_get (dpo->dpoi_index);
+ if (tc->c_is_ip4)
+ {
+ ip4_tcp_hdr_t hdr;
+ memset (&hdr, 0, sizeof (hdr));
+ hdr.ip.protocol = IP_PROTOCOL_TCP;
+ hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32;
+ hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32;
+ hdr.tcp.src_port = tc->c_lcl_port;
+ hdr.tcp.dst_port = tc->c_rmt_port;
+ hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config);
+ }
+ else
+ {
+ ip6_tcp_hdr_t hdr;
+ memset (&hdr, 0, sizeof (hdr));
+ hdr.ip.protocol = IP_PROTOCOL_TCP;
+ clib_memcpy (&hdr.ip.src_address, &tc->c_lcl_ip.ip6,
+ sizeof (ip6_address_t));
+ clib_memcpy (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6,
+ sizeof (ip6_address_t));
+ hdr.tcp.src_port = tc->c_lcl_port;
+ hdr.tcp.dst_port = tc->c_rmt_port;
+ hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config);
+ }
+ choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1);
+ dpo_copy (result, choice);
+}
+
+fib_node_index_t
+tcp_lookup_rmt_in_fib (tcp_connection_t * tc)
+{
+ fib_prefix_t prefix;
+
+ clib_memcpy (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr));
+ prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
+ prefix.fp_len = tc->c_is_ip4 ? 32 : 128;
+ return fib_table_lookup (0, &prefix);
+}
+
+static int
+tcp_connection_stack_on_fib_entry (tcp_connection_t * tc)
+{
+ dpo_id_t choice = DPO_INVALID;
+ u32 output_node_index;
+ fib_entry_t *fe;
+
+ fe = fib_entry_get (tc->c_rmt_fei);
+ if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE)
+ return -1;
+
+ tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice);
+
+ output_node_index =
+ tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index;
+ dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice);
+ return 0;
+}
+
+/** Stack tcp connection on peer's fib entry.
+ *
+ * This ultimately populates the dpo the connection will use to send packets.
+ */
+static void
+tcp_connection_fib_attach (tcp_connection_t * tc)
+{
+ tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc);
+
+ ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID);
+
+ tcp_connection_stack_on_fib_entry (tc);
+}
+#endif /* 0 */
+
/** Initialize tcp connection variables
*
* Should be called after having received a msg from the peer, i.e., a SYN or
tcp_connection_init_vars (tcp_connection_t * tc)
{
tcp_connection_timers_init (tc);
- tcp_set_snd_mss (tc);
+ tcp_init_mss (tc);
scoreboard_init (&tc->sack_sb);
tcp_cc_init (tc);
+ // tcp_connection_fib_attach (tc);
}
int
tcp_main_t *tm = vnet_get_tcp_main ();
tcp_connection_t *tc;
fib_prefix_t prefix;
- u32 fei, sw_if_index;
+ fib_node_index_t fei;
+ u32 sw_if_index;
ip46_address_t lcl_addr;
- u16 lcl_port;
+ int lcl_port;
/*
* Find the local address and allocate port
/* Couldn't find route to destination. Bail out. */
if (fei == FIB_NODE_INDEX_INVALID)
- return -1;
+ {
+ clib_warning ("no route to destination");
+ return -1;
+ }
sw_if_index = fib_entry_get_resolving_interface (fei);
if (sw_if_index == (u32) ~ 0)
- return -1;
+ {
+ clib_warning ("no resolving interface for %U", format_ip46_address,
+ rmt_addr, IP46_TYPE_IP4);
+ return -1;
+ }
if (is_ip4)
{
ip4_address_t *ip4;
- ip4 = ip_interface_get_first_ip (sw_if_index, 1);
- lcl_addr.ip4.as_u32 = ip4->as_u32;
+ int index;
+ if (vec_len (tm->ip4_src_addresses))
+ {
+ index = tm->last_v4_address_rotor++;
+ if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses))
+ tm->last_v4_address_rotor = 0;
+ lcl_addr.ip4.as_u32 = tm->ip4_src_addresses[index].as_u32;
+ }
+ else
+ {
+ ip4 = ip_interface_get_first_ip (sw_if_index, 1);
+ lcl_addr.ip4.as_u32 = ip4->as_u32;
+ }
}
else
{
ip6_address_t *ip6;
- ip6 = ip_interface_get_first_ip (sw_if_index, 0);
- clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6));
+ int index;
+
+ if (vec_len (tm->ip6_src_addresses))
+ {
+ index = tm->last_v6_address_rotor++;
+ if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses))
+ tm->last_v6_address_rotor = 0;
+ clib_memcpy (&lcl_addr.ip6, &tm->ip6_src_addresses[index],
+ sizeof (*ip6));
+ }
+ else
+ {
+ ip6 = ip_interface_get_first_ip (sw_if_index, 0);
+ clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6));
+ }
}
/* Allocate source port */
/* The other connection vars will be initialized after SYN ACK */
tcp_connection_timers_init (tc);
- tcp_send_syn (tc);
-
- tc->state = TCP_STATE_SYN_SENT;
-
TCP_EVT_DBG (TCP_EVT_OPEN, tc);
+ tc->state = TCP_STATE_SYN_SENT;
+ tcp_send_syn (tc);
return tc->c_c_index;
}
u8 *
format_tcp_state (u8 * s, va_list * args)
{
- tcp_state_t *state = va_arg (*args, tcp_state_t *);
+ u32 state = va_arg (*args, u32);
- if (*state < TCP_N_STATES)
- s = format (s, "%s", tcp_fsm_states[*state]);
+ if (state < TCP_N_STATES)
+ s = format (s, "%s", tcp_fsm_states[state]);
else
- s = format (s, "UNKNOWN (%d (0x%x))", *state, *state);
-
+ s = format (s, "UNKNOWN (%d (0x%x))", state, state);
return s;
}
format_tcp_timers (u8 * s, va_list * args)
{
tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
- int i, last = 0;
+ int i, last = -1;
for (i = 0; i < TCP_N_TIMERS; i++)
if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID)
s = format (s, "%s,", tcp_conn_timers[i]);
}
- if (last > 0)
+ if (last >= 0)
s = format (s, "%s]", tcp_conn_timers[i]);
else
s = format (s, "]");
}
u8 *
-format_tcp_connection (u8 * s, va_list * args)
+format_tcp_congestion_status (u8 * s, va_list * args)
+{
+ tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
+ if (tcp_in_recovery (tc))
+ s = format (s, "recovery");
+ else if (tcp_in_fastrecovery (tc))
+ s = format (s, "fastrecovery");
+ else
+ s = format (s, "none");
+ return s;
+}
+
+u8 *
+format_tcp_vars (u8 * s, va_list * args)
+{
+ tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
+ s = format (s, " snd_una %u snd_nxt %u snd_una_max %u",
+ tc->snd_una - tc->iss, tc->snd_nxt - tc->iss,
+ tc->snd_una_max - tc->iss);
+ s = format (s, " rcv_nxt %u rcv_las %u\n",
+ tc->rcv_nxt - tc->irs, tc->rcv_las - tc->irs);
+ s = format (s, " snd_wnd %u rcv_wnd %u snd_wl1 %u snd_wl2 %u\n",
+ tc->snd_wnd, tc->rcv_wnd, tc->snd_wl1 - tc->irs,
+ tc->snd_wl2 - tc->iss);
+ s = format (s, " flight size %u send space %u rcv_wnd_av %d\n",
+ tcp_flight_size (tc), tcp_available_snd_space (tc),
+ tcp_rcv_wnd_available (tc));
+ s = format (s, " cong %U ", format_tcp_congestion_status, tc);
+ s = format (s, "cwnd %u ssthresh %u rtx_bytes %u bytes_acked %u\n",
+ tc->cwnd, tc->ssthresh, tc->snd_rxt_bytes, tc->bytes_acked);
+ s = format (s, " prev_ssthresh %u snd_congestion %u dupack %u",
+ tc->prev_ssthresh, tc->snd_congestion - tc->iss,
+ tc->rcv_dupacks);
+ s = format (s, " limited_transmit %u\n", tc->limited_transmit - tc->iss);
+ s = format (s, " tsecr %u tsecr_last_ack %u\n", tc->rcv_opts.tsecr,
+ tc->tsecr_last_ack);
+ s = format (s, " rto %u rto_boff %u srtt %u rttvar %u rtt_ts %u ", tc->rto,
+ tc->rto_boff, tc->srtt, tc->rttvar, tc->rtt_ts);
+ s = format (s, "rtt_seq %u\n", tc->rtt_seq);
+ s = format (s, " tsval_recent %u tsval_recent_age %u\n", tc->tsval_recent,
+ tcp_time_now () - tc->tsval_recent_age);
+ s = format (s, " scoreboard: %U\n", format_tcp_scoreboard, &tc->sack_sb);
+ if (vec_len (tc->snd_sacks))
+ s = format (s, " sacks tx: %U\n", format_tcp_sacks, tc);
+
+ return s;
+}
+
+u8 *
+format_tcp_connection_id (u8 * s, va_list * args)
{
tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
if (!tc)
}
u8 *
-format_tcp_connection_verbose (u8 * s, va_list * args)
+format_tcp_connection (u8 * s, va_list * args)
{
tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
- s = format (s, "%U %U %U", format_tcp_connection, tc, format_tcp_state,
- &tc->state, format_tcp_timers, tc);
+ u32 verbose = va_arg (*args, u32);
+
+ s = format (s, "%-50U", format_tcp_connection_id, tc);
+ if (verbose)
+ {
+ s = format (s, "%-15U", format_tcp_state, tc->state);
+ if (verbose > 1)
+ s = format (s, " %U\n%U", format_tcp_timers, tc, format_tcp_vars, tc);
+ }
+
return s;
}
{
u32 tci = va_arg (*args, u32);
u32 thread_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
tcp_connection_t *tc;
tc = tcp_connection_get (tci, thread_index);
if (tc)
- return format (s, "%U", format_tcp_connection, tc);
+ s = format (s, "%U", format_tcp_connection, tc, verbose);
else
- return format (s, "empty");
+ s = format (s, "empty");
+ return s;
}
u8 *
{
u32 tci = va_arg (*args, u32);
tcp_connection_t *tc = tcp_listener_get (tci);
- return format (s, "%U", format_tcp_connection, tc);
+ return format (s, "%U", format_tcp_connection_id, tc);
}
u8 *
{
u32 tci = va_arg (*args, u32);
tcp_connection_t *tc = tcp_half_open_connection_get (tci);
- return format (s, "%U", format_tcp_connection, tc);
+ return format (s, "%U", format_tcp_connection_id, tc);
+}
+
+u8 *
+format_tcp_sacks (u8 * s, va_list * args)
+{
+ tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
+ sack_block_t *sacks = tc->snd_sacks;
+ sack_block_t *block;
+ int i, len = 0;
+
+ len = vec_len (sacks);
+ for (i = 0; i < len - 1; i++)
+ {
+ block = &sacks[i];
+ s = format (s, " start %u end %u\n", block->start - tc->irs,
+ block->end - tc->irs);
+ }
+ if (len)
+ {
+ block = &sacks[len - 1];
+ s = format (s, " start %u end %u", block->start - tc->irs,
+ block->end - tc->irs);
+ }
+ return s;
+}
+
+u8 *
+format_tcp_rcv_sacks (u8 * s, va_list * args)
+{
+ tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
+ sack_block_t *sacks = tc->rcv_opts.sacks;
+ sack_block_t *block;
+ int i, len = 0;
+
+ len = vec_len (sacks);
+ for (i = 0; i < len - 1; i++)
+ {
+ block = &sacks[i];
+ s = format (s, " start %u end %u\n", block->start - tc->iss,
+ block->end - tc->iss);
+ }
+ if (len)
+ {
+ block = &sacks[len - 1];
+ s = format (s, " start %u end %u", block->start - tc->iss,
+ block->end - tc->iss);
+ }
+ return s;
+}
+
+u8 *
+format_tcp_sack_hole (u8 * s, va_list * args)
+{
+ sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *);
+ s = format (s, "[%u, %u]", hole->start, hole->end);
+ return s;
+}
+
+u8 *
+format_tcp_scoreboard (u8 * s, va_list * args)
+{
+ sack_scoreboard_t *sb = va_arg (*args, sack_scoreboard_t *);
+ sack_scoreboard_hole_t *hole;
+ s = format (s, "sacked_bytes %u last_sacked_bytes %u lost_bytes %u\n",
+ sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes);
+ s = format (s, " last_bytes_delivered %u high_sacked %u snd_una_adv %u\n",
+ sb->last_bytes_delivered, sb->high_sacked, sb->snd_una_adv);
+ s = format (s, " cur_rxt_hole %u high_rxt %u rescue_rxt %u",
+ sb->cur_rxt_hole, sb->high_rxt, sb->rescue_rxt);
+
+ hole = scoreboard_first_hole (sb);
+ if (hole)
+ s = format (s, "\n head %u tail %u holes:\n", sb->head, sb->tail);
+
+ while (hole)
+ {
+ s = format (s, "%U", format_tcp_sack_hole, hole);
+ hole = scoreboard_next_hole (sb, hole);
+ }
+
+ return s;
}
transport_connection_t *
return &tc->connection;
}
+/**
+ * Compute maximum segment size for session layer.
+ *
+ * Since the result needs to be the actual data length, it first computes
+ * the tcp options to be used in the next burst and subtracts their
+ * length from the connection's snd_mss.
+ */
u16
tcp_session_send_mss (transport_connection_t * trans_conn)
{
tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+
+ /* Ensure snd_mss does accurately reflect the amount of data we can push
+ * in a segment. This also makes sure that options are updated according to
+ * the current state of the connection. */
+ tcp_update_snd_mss (tc);
+
return tc->snd_mss;
}
+always_inline u32
+tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space)
+{
+ if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss))
+ {
+ return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0;
+ }
+
+ /* If we can't write at least a segment, don't try at all */
+ if (PREDICT_FALSE (snd_space < tc->snd_mss))
+ {
+ if (snd_space > clib_min (tc->mss, tc->rcv_opts.mss) - TCP_HDR_LEN_MAX)
+ return snd_space;
+ return 0;
+ }
+
+ /* round down to mss multiple */
+ return snd_space - (snd_space % tc->snd_mss);
+}
+
/**
* Compute tx window session is allowed to fill.
+ *
+ * Takes into account available send space, snd_mss and the congestion
+ * state of the connection. If possible, the value returned is a multiple
+ * of snd_mss.
+ *
+ * @param tc tcp connection
+ * @return number of bytes session is allowed to write
*/
u32
-tcp_session_send_space (transport_connection_t * trans_conn)
+tcp_snd_space (tcp_connection_t * tc)
{
- u32 snd_space, chunk;
- tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+ int snd_space, snt_limited;
- /* If we haven't gotten dupacks or if we did and have gotten sacked bytes
- * then we can still send */
- if (PREDICT_TRUE (tcp_in_fastrecovery (tc) == 0
- && (tc->rcv_dupacks == 0
- || tc->sack_sb.last_sacked_bytes)))
+ if (PREDICT_TRUE (tcp_in_cong_recovery (tc) == 0))
{
- chunk = tc->snd_wnd > tc->snd_mss ? tc->snd_mss : tc->snd_wnd;
snd_space = tcp_available_snd_space (tc);
- /* If we can't write at least a segment, don't try at all */
- if (chunk == 0 || snd_space < chunk)
- return 0;
+ /* If we haven't gotten dupacks or if we did and have gotten sacked
+ * bytes then we can still send as per Limited Transmit (RFC3042) */
+ if (PREDICT_FALSE (tc->rcv_dupacks != 0
+ && (tcp_opts_sack_permitted (tc)
+ && tc->sack_sb.last_sacked_bytes == 0)))
+ {
+ if (tc->rcv_dupacks == 1 && tc->limited_transmit != tc->snd_nxt)
+ tc->limited_transmit = tc->snd_nxt;
+ ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt));
- /* round down to mss multiple */
- return snd_space - (snd_space % chunk);
+ snt_limited = tc->snd_nxt - tc->limited_transmit;
+ snd_space = clib_max (2 * tc->snd_mss - snt_limited, 0);
+ }
+ return tcp_round_snd_space (tc, snd_space);
+ }
+
+ if (tcp_in_recovery (tc))
+ {
+ tc->snd_nxt = tc->snd_una_max;
+ snd_space = tcp_available_wnd (tc) - tc->snd_rxt_bytes
+ - (tc->snd_una_max - tc->snd_congestion);
+ if (snd_space <= 0 || (tc->snd_una_max - tc->snd_una) >= tc->snd_wnd)
+ return 0;
+ return tcp_round_snd_space (tc, snd_space);
}
/* If in fast recovery, send 1 SMSS if wnd allows */
- if (tcp_in_fastrecovery (tc) && tcp_available_snd_space (tc)
- && tcp_fastrecovery_sent_1_smss (tc))
+ if (tcp_in_fastrecovery (tc)
+ && tcp_available_snd_space (tc) && !tcp_fastrecovery_sent_1_smss (tc))
{
tcp_fastrecovery_1_smss_on (tc);
return tc->snd_mss;
return 0;
}
+u32
+tcp_session_send_space (transport_connection_t * trans_conn)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+ return tcp_snd_space (tc);
+}
+
+i32
+tcp_rcv_wnd_available (tcp_connection_t * tc)
+{
+ return (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las);
+}
+
u32
tcp_session_tx_fifo_offset (transport_connection_t * trans_conn)
{
vlib_thread_main_t *vtm = vlib_get_thread_main ();
clib_error_t *error = 0;
u32 num_threads;
+ int thread, i;
+ tcp_connection_t *tc __attribute__ ((unused));
if ((error = vlib_call_init_function (vm, ip_main_init)))
return error;
num_threads = 1 /* main thread */ + vtm->n_threads;
vec_validate (tm->connections, num_threads - 1);
+ /*
+ * Preallocate connections
+ */
+ for (thread = 0; thread < num_threads; thread++)
+ {
+ for (i = 0; i < tm->preallocated_connections; i++)
+ pool_get (tm->connections[thread], tc);
+
+ for (i = 0; i < tm->preallocated_connections; i++)
+ pool_put_index (tm->connections[thread], i);
+ }
+
+ /*
+ * Preallocate half-open connections
+ */
+ for (i = 0; i < tm->preallocated_half_open_connections; i++)
+ pool_get (tm->half_open_connections, tc);
+
+ for (i = 0; i < tm->preallocated_half_open_connections; i++)
+ pool_put_index (tm->half_open_connections, i);
+
/* Initialize per worker thread tx buffers (used for control messages) */
vec_validate (tm->tx_buffers, num_threads - 1);
vec_validate (tm->timer_wheels, num_threads - 1);
tcp_initialize_timer_wheels (tm);
-// vec_validate (tm->delack_connections, num_threads - 1);
-
/* Initialize clocks per tick for TCP timestamp. Used to compute
* monotonically increasing timestamps. */
tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoint table",
200000 /* $$$$ config parameter nbuckets */ ,
(64 << 20) /*$$$ config parameter table size */ );
-
+ clib_spinlock_init (&tm->half_open_lock);
return error;
}
{
tcp_main_t *tm = vnet_get_tcp_main ();
- tm->vlib_main = vm;
tm->vnet_main = vnet_get_main ();
tm->is_enabled = 0;
VLIB_INIT_FUNCTION (tcp_init);
+
+static clib_error_t *
+tcp_config_fn (vlib_main_t * vm, unformat_input_t * input)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat
+ (input, "preallocated-connections %d",
+ &tm->preallocated_connections))
+ ;
+ else if (unformat (input, "preallocated-half-open-connections %d",
+ &tm->preallocated_half_open_connections))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (tcp_config_fn, "tcp");
+
+static clib_error_t *
+tcp_src_address (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd_arg)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ ip4_address_t v4start, v4end;
+ ip6_address_t v6start, v6end;
+ int v4set = 0;
+ int v6set = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%U - %U", unformat_ip4_address, &v4start,
+ unformat_ip4_address, &v4end))
+ v4set = 1;
+ else if (unformat (input, "%U", unformat_ip4_address, &v4start))
+ {
+ memcpy (&v4end, &v4start, sizeof (v4start));
+ v4set = 1;
+ }
+ else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start,
+ unformat_ip4_address, &v6end))
+ v6set = 1;
+ else if (unformat (input, "%U", unformat_ip6_address, &v6start))
+ {
+ memcpy (&v6end, &v6start, sizeof (v4start));
+ v6set = 1;
+ }
+ else
+ break;
+ }
+
+ if (!v4set && !v6set)
+ return clib_error_return (0, "at least one v4 or v6 address required");
+
+ if (v4set)
+ {
+ u32 tmp;
+
+ do
+ {
+ vec_add1 (tm->ip4_src_addresses, v4start);
+ tmp = clib_net_to_host_u32 (v4start.as_u32);
+ tmp++;
+ v4start.as_u32 = clib_host_to_net_u32 (tmp);
+ }
+ while (clib_host_to_net_u32 (v4start.as_u32) <=
+ clib_host_to_net_u32 (v4end.as_u32));
+ }
+ if (v6set)
+ {
+ clib_warning ("v6 src address list unimplemented...");
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (tcp_src_address_command, static) =
+{
+ .path = "tcp src-address",
+ .short_help = "tcp src-address <ip-addr> [- <ip-addr>] add src address range",
+ .function = tcp_src_address,
+};
+/* *INDENT-ON* */
+
+static u8 *
+tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb)
+{
+#if TCP_SCOREBOARD_TRACE
+
+ scoreboard_trace_elt_t *block;
+ int i = 0;
+
+ if (!sb->trace)
+ return s;
+
+ s = format (s, "scoreboard trace:");
+ vec_foreach (block, sb->trace)
+ {
+ s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end,
+ block->ack, block->snd_una_max, block->group);
+ if ((++i % 3) == 0)
+ s = format (s, "\n");
+ }
+ return s;
+#else
+ return 0;
+#endif
+}
+
+static clib_error_t *
+tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd_arg)
+{
+ transport_connection_t *tconn = 0;
+ tcp_connection_t *tc;
+ u8 *s = 0;
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%U", unformat_transport_connection, &tconn,
+ TRANSPORT_PROTO_TCP))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ if (!TCP_SCOREBOARD_TRACE)
+ {
+ vlib_cli_output (vm, "scoreboard tracing not enabled");
+ return 0;
+ }
+
+ tc = tcp_get_connection_from_transport (tconn);
+ s = tcp_scoreboard_dump_trace (s, &tc->sack_sb);
+ vlib_cli_output (vm, "%v", s);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) =
+{
+ .path = "show tcp scoreboard trace",
+ .short_help = "show tcp scoreboard trace <connection>",
+ .function = tcp_show_scoreboard_trace_fn,
+};
+/* *INDENT-ON* */
+
+u8 *
+tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose)
+{
+ int i, trace_len;
+ scoreboard_trace_elt_t *trace;
+ u32 next_ack, left, group, has_new_ack = 0;
+ tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc;
+ sack_block_t *block;
+
+ if (!tc)
+ return s;
+
+ memset (dummy_tc, 0, sizeof (*dummy_tc));
+ tcp_connection_timers_init (dummy_tc);
+ scoreboard_init (&dummy_tc->sack_sb);
+ dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK;
+
+#if TCP_SCOREBOARD_TRACE
+ trace = tc->sack_sb.trace;
+ trace_len = vec_len (tc->sack_sb.trace);
+#else
+ trace = 0;
+ trace_len = 0;
+#endif
+
+ for (i = 0; i < trace_len; i++)
+ {
+ if (trace[i].ack != 0)
+ {
+ dummy_tc->snd_una = trace[i].ack - 1448;
+ dummy_tc->snd_una_max = trace[i].ack;
+ }
+ }
+
+ left = 0;
+ while (left < trace_len)
+ {
+ group = trace[left].group;
+ vec_reset_length (dummy_tc->rcv_opts.sacks);
+ has_new_ack = 0;
+ while (trace[left].group == group)
+ {
+ if (trace[left].ack != 0)
+ {
+ if (verbose)
+ s = format (s, "Adding ack %u, snd_una_max %u, segs: ",
+ trace[left].ack, trace[left].snd_una_max);
+ dummy_tc->snd_una_max = trace[left].snd_una_max;
+ next_ack = trace[left].ack;
+ has_new_ack = 1;
+ }
+ else
+ {
+ if (verbose)
+ s = format (s, "[%u, %u], ", trace[left].start,
+ trace[left].end);
+ vec_add2 (dummy_tc->rcv_opts.sacks, block, 1);
+ block->start = trace[left].start;
+ block->end = trace[left].end;
+ }
+ left++;
+ }
+
+ /* Push segments */
+ tcp_rcv_sacks (dummy_tc, next_ack);
+ if (has_new_ack)
+ dummy_tc->snd_una = next_ack + dummy_tc->sack_sb.snd_una_adv;
+
+ if (verbose)
+ s = format (s, "result: %U", format_tcp_scoreboard,
+ &dummy_tc->sack_sb);
+
+ }
+ s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb);
+
+ return s;
+}
+
+static clib_error_t *
+tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd_arg)
+{
+ transport_connection_t *tconn = 0;
+ tcp_connection_t *tc = 0;
+ u8 *str = 0;
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%U", unformat_transport_connection, &tconn,
+ TRANSPORT_PROTO_TCP))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ if (!TCP_SCOREBOARD_TRACE)
+ {
+ vlib_cli_output (vm, "scoreboard tracing not enabled");
+ return 0;
+ }
+
+ tc = tcp_get_connection_from_transport (tconn);
+ if (!tc)
+ {
+ vlib_cli_output (vm, "connection not found");
+ return 0;
+ }
+ str = tcp_scoreboard_replay (str, tc, 1);
+ vlib_cli_output (vm, "%v", str);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) =
+{
+ .path = "tcp replay scoreboard",
+ .short_help = "tcp replay scoreboard <connection>",
+ .function = tcp_scoreboard_trace_fn,
+};
+/* *INDENT-ON* */
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff