1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #ifndef _INET_TCP_IMPL_H
26 #define _INET_TCP_IMPL_H
27
28 /*
29 * TCP implementation private declarations. These interfaces are
30 * used to build the IP module and are not meant to be accessed
31 * by any modules except IP itself. They are undocumented and are
32 * subject to change without notice.
33 */
34
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38
39 #ifdef _KERNEL
40
41 #include
42 #include /* For LBOLT_FASTPATH{,64} */
43 #include
44 #include
45 #include
46
47 #define TCP_MOD_ID 5105
48
49 extern struct qinit tcp_sock_winit;
50 extern struct qinit tcp_winit;
51
52 extern sock_downcalls_t sock_tcp_downcalls;
53
54 /*
55 * Bind hash list size and has function. It has to be a power of 2 for
56 * hashing.
57 */
58 #define TCP_BIND_FANOUT_SIZE 512
59 #define TCP_BIND_HASH(lport) (ntohs(lport) & (TCP_BIND_FANOUT_SIZE - 1))
60
61 /*
62 * This implementation follows the 4.3BSD interpretation of the urgent
63 * pointer and not RFC 1122. Switching to RFC 1122 behavior would cause
64 * incompatible changes in protocols like telnet and rlogin.
65 */
66 #define TCP_OLD_URP_INTERPRETATION 1
67
68 /* TCP option length */
69 #define TCPOPT_NOP_LEN 1
70 #define TCPOPT_MAXSEG_LEN 4
71 #define TCPOPT_WS_LEN 3
72 #define TCPOPT_REAL_WS_LEN (TCPOPT_WS_LEN+1)
73 #define TCPOPT_TSTAMP_LEN 10
74 #define TCPOPT_REAL_TS_LEN (TCPOPT_TSTAMP_LEN+2)
75 #define TCPOPT_SACK_OK_LEN 2
76 #define TCPOPT_REAL_SACK_OK_LEN (TCPOPT_SACK_OK_LEN+2)
77 #define TCPOPT_REAL_SACK_LEN 4
78 #define TCPOPT_MAX_SACK_LEN 36
79 #define TCPOPT_HEADER_LEN 2
80
81 /* Round up the value to the nearest mss. */
82 #define MSS_ROUNDUP(value, mss) ((((value) - 1) / (mss) + 1) * (mss))
83
84 /*
85 * Was this tcp created via socket() interface?
86 */
87 #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket)
88
89 /*
90 * Is this tcp not attached to any upper client?
91 */
92 #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached)
93
94 /* TCP timers related data strucutres. Refer to tcp_timers.c. */
95 typedef struct tcp_timer_s {
96 conn_t *connp;
97 void (*tcpt_proc)(void *);
98 callout_id_t tcpt_tid;
99 } tcp_timer_t;
100
101 extern kmem_cache_t *tcp_timercache;
102
103 /*
104 * Macro for starting various timers. Retransmission timer has its own macro,
105 * TCP_TIMER_RESTART(). tim is in millisec.
106 */
107 #define TCP_TIMER(tcp, f, tim) \
108 tcp_timeout(tcp->tcp_connp, f, tim)
109 #define TCP_TIMER_CANCEL(tcp, id) \
110 tcp_timeout_cancel(tcp->tcp_connp, id)
111
112 /*
113 * To restart the TCP retransmission timer. intvl is in millisec.
114 */
115 #define TCP_TIMER_RESTART(tcp, intvl) { \
116 if ((tcp)->tcp_timer_tid != 0) \
117 (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \
118 (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, (intvl)); \
119 }
120
121 /*
122 * For scalability, we must not run a timer for every TCP connection
123 * in TIME_WAIT state. To see why, consider (for time wait interval of
124 * 1 minutes):
125 * 10,000 connections/sec * 60 seconds/time wait = 600,000 active conn's
126 *
127 * This list is ordered by time, so you need only delete from the head
128 * until you get to entries which aren't old enough to delete yet.
129 * The list consists of only the detached TIME_WAIT connections.
130 *
131 * When a tcp_t enters TIME_WAIT state, a timer is started (timeout is
132 * tcps_time_wait_interval). When the tcp_t is detached (upper layer closes
133 * the end point), it is moved to the time wait list and another timer is
134 * started (expiry time is set at tcp_time_wait_expire, which is
135 * also calculated using tcps_time_wait_interval). This means that the
136 * TIME_WAIT state can be extended (up to doubled) if the tcp_t doesn't
137 * become detached for a long time.
138 *
139 * The list manipulations (including tcp_time_wait_next/prev)
140 * are protected by the tcp_time_wait_lock. The content of the
141 * detached TIME_WAIT connections is protected by the normal perimeters.
142 *
143 * This list is per squeue and squeues are shared across the tcp_stack_t's.
144 * Things on tcp_time_wait_head remain associated with the tcp_stack_t
145 * and conn_netstack.
146 * The tcp_t's that are added to tcp_free_list are disassociated and
147 * have NULL tcp_tcps and conn_netstack pointers.
148 */
149 typedef struct tcp_squeue_priv_s {
150 kmutex_t tcp_time_wait_lock;
151 callout_id_t tcp_time_wait_tid;
152 tcp_t *tcp_time_wait_head;
153 tcp_t *tcp_time_wait_tail;
154 tcp_t *tcp_free_list;
155 uint_t tcp_free_list_cnt;
156 #ifdef DEBUG
157 /*
158 * For debugging purpose, true when tcp_time_wait_collector() is
159 * running.
160 */
161 boolean_t tcp_time_wait_running;
162 #endif
163 } tcp_squeue_priv_t;
164
165 /*
166 * Parameters for TCP Initial Send Sequence number (ISS) generation. When
167 * tcp_strong_iss is set to 1, which is the default, the ISS is calculated
168 * by adding three components: a time component which grows by 1 every 4096
169 * nanoseconds (versus every 4 microseconds suggested by RFC 793, page 27);
170 * a per-connection component which grows by 125000 for every new connection;
171 * and an "extra" component that grows by a random amount centered
172 * approximately on 64000. This causes the ISS generator to cycle every
173 * 4.89 hours if no TCP connections are made, and faster if connections are
174 * made.
175 *
176 * When tcp_strong_iss is set to 0, ISS is calculated by adding two
177 * components: a time component which grows by 250000 every second; and
178 * a per-connection component which grows by 125000 for every new connections.
179 *
180 * A third method, when tcp_strong_iss is set to 2, for generating ISS is
181 * prescribed by Steve Bellovin. This involves adding time, the 125000 per
182 * connection, and a one-way hash (MD5) of the connection ID , a "truly" random (per RFC 1750) number, and a console-entered
184 * password.
185 */
186 #define ISS_INCR 250000
187 #define ISS_NSEC_SHT 12
188
189 /* Macros for timestamp comparisons */
190 #define TSTMP_GEQ(a, b) ((int32_t)((a)-(b)) >= 0)
191 #define TSTMP_LT(a, b) ((int32_t)((a)-(b)) < 0)
192
193 /*
194 * Initialize cwnd according to RFC 3390. def_max_init_cwnd is
195 * either tcp_slow_start_initial or tcp_slow_start_after idle
196 * depending on the caller. If the upper layer has not used the
197 * TCP_INIT_CWND option to change the initial cwnd, tcp_init_cwnd
198 * should be 0 and we use the formula in RFC 3390 to set tcp_cwnd.
199 * If the upper layer has changed set the tcp_init_cwnd, just use
200 * it to calculate the tcp_cwnd.
201 */
202 #define TCP_SET_INIT_CWND(tcp, mss, def_max_init_cwnd) \
203 { \
204 if ((tcp)->tcp_init_cwnd == 0) { \
205 (tcp)->tcp_cwnd = MIN(def_max_init_cwnd * (mss), \
206 MIN(4 * (mss), MAX(2 * (mss), 4380 / (mss) * (mss)))); \
207 } else { \
208 (tcp)->tcp_cwnd = (tcp)->tcp_init_cwnd * (mss); \
209 } \
210 tcp->tcp_cwnd_cnt = 0; \
211 }
212
213 /*
214 * Set ECN capable transport (ECT) code point in IP header.
215 *
216 * Note that there are 2 ECT code points '01' and '10', which are called
217 * ECT(1) and ECT(0) respectively. Here we follow the original ECT code
218 * point ECT(0) for TCP as described in RFC 2481.
219 */
220 #define TCP_SET_ECT(tcp, iph) \
221 if ((tcp)->tcp_connp->conn_ipversion == IPV4_VERSION) { \
222 /* We need to clear the code point first. */ \
223 ((ipha_t *)(iph))->ipha_type_of_service &= 0xFC; \
224 ((ipha_t *)(iph))->ipha_type_of_service |= IPH_ECN_ECT0; \
225 } else { \
226 ((ip6_t *)(iph))->ip6_vcf &= htonl(0xFFCFFFFF); \
227 ((ip6_t *)(iph))->ip6_vcf |= htonl(IPH_ECN_ECT0 << 20); \
228 }
229
230 /*
231 * Set tcp_rto with boundary checking.
232 */
233 #define TCP_SET_RTO(tcp, rto) \
234 if ((rto) < (tcp)->tcp_rto_min) \
235 (tcp)->tcp_rto = (tcp)->tcp_rto_min; \
236 else if ((rto) > (tcp)->tcp_rto_max) \
237 (tcp)->tcp_rto = (tcp)->tcp_rto_max; \
238 else \
239 (tcp)->tcp_rto = (rto);
240
241 /*
242 * TCP options struct returned from tcp_parse_options.
243 */
244 typedef struct tcp_opt_s {
245 uint32_t tcp_opt_mss;
246 uint32_t tcp_opt_wscale;
247 uint32_t tcp_opt_ts_val;
248 uint32_t tcp_opt_ts_ecr;
249 tcp_t *tcp;
250 } tcp_opt_t;
251
252 /*
253 * Write-side flow-control is implemented via the per instance STREAMS
254 * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s)
255 * and clearing QFULL and calling qbackenable() to restart the flow based
256 * on the number of TCP unsent bytes (i.e. those not on the wire waiting
257 * for a remote ACK).
258 *
259 * This is different than a standard STREAMS kmod which when using the
260 * STREAMS Q the framework would automatictly flow-control based on the
261 * defined hiwat/lowat values as mblk_t's are enqueued/dequeued.
262 *
263 * As of FireEngine TCP write-side flow-control needs to take into account
264 * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes
265 * (i.e. from tcp_wput() -> tcp_output()).
266 *
267 * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to
268 * count the number of bytes enqueued by tcp_wput() and the number of bytes
269 * dequeued and processed by tcp_output().
270 *
271 * So, the total number of bytes unsent is (squeue_bytes + unsent) with all
272 * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES.
273 */
274 extern void tcp_clrqfull(tcp_t *);
275 extern void tcp_setqfull(tcp_t *);
276
277 #define TCP_UNSENT_BYTES(tcp) \
278 ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent)
279
280 /*
281 * Linked list struct to store listener connection limit configuration per
282 * IP stack. The list is stored at tcps_listener_conf in tcp_stack_t.
283 *
284 * tl_port: the listener port of this limit configuration
285 * tl_ratio: the maximum amount of memory consumed by all concurrent TCP
286 * connections created by a listener does not exceed 1/tl_ratio
287 * of the total system memory. Note that this is only an
288 * approximation.
289 * tl_link: linked list struct
290 */
291 typedef struct tcp_listener_s {
292 in_port_t tl_port;
293 uint32_t tl_ratio;
294 list_node_t tl_link;
295 } tcp_listener_t;
296
297 /*
298 * If there is a limit set on the number of connections allowed per each
299 * listener, the following struct is used to store that counter. It keeps
300 * the number of TCP connection created by a listener. Note that this needs
301 * to be separated from the listener since the listener can go away before
302 * all the connections are gone.
303 *
304 * When the struct is allocated, tlc_cnt is set to 1. When a new connection
305 * is created by the listener, tlc_cnt is incremented by 1. When a connection
306 * created by the listener goes away, tlc_count is decremented by 1. When the
307 * listener itself goes away, tlc_cnt is decremented by one. The last
308 * connection (or the listener) which decrements tlc_cnt to zero frees the
309 * struct.
310 *
311 * tlc_max is the maximum number of concurrent TCP connections created from a
312 * listner. It is calculated when the tcp_listen_cnt_t is allocated.
313 *
314 * tlc_report_time stores the time when cmn_err() is called to report that the
315 * max has been exceeeded. Report is done at most once every
316 * TCP_TLC_REPORT_INTERVAL mins for a listener.
317 *
318 * tlc_drop stores the number of connection attempt dropped because the
319 * limit has reached.
320 */
321 typedef struct tcp_listen_cnt_s {
322 uint32_t tlc_max;
323 uint32_t tlc_cnt;
324 int64_t tlc_report_time;
325 uint32_t tlc_drop;
326 } tcp_listen_cnt_t;
327
328 #define TCP_TLC_REPORT_INTERVAL (30 * MINUTES)
329
330 #define TCP_DECR_LISTEN_CNT(tcp) \
331 { \
332 ASSERT((tcp)->tcp_listen_cnt->tlc_cnt > 0); \
333 if (atomic_add_32_nv(&(tcp)->tcp_listen_cnt->tlc_cnt, -1) == 0) \
334 kmem_free((tcp)->tcp_listen_cnt, sizeof (tcp_listen_cnt_t)); \
335 (tcp)->tcp_listen_cnt = NULL; \
336 }
337
338 /* Increment and decrement the number of connections in tcp_stack_t. */
339 #define TCPS_CONN_INC(tcps) \
340 atomic_inc_64( \
341 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt)
342
343 #define TCPS_CONN_DEC(tcps) \
344 atomic_dec_64( \
345 (uint64_t *)&(tcps)->tcps_sc[CPU->cpu_seqid]->tcp_sc_conn_cnt)
346
347 /*
348 * When the system is under memory pressure, stack variable tcps_reclaim is
349 * true, we shorten the connection timeout abort interval to tcp_early_abort
350 * seconds. Defined in tcp.c.
351 */
352 extern uint32_t tcp_early_abort;
353
354 /*
355 * To reach to an eager in Q0 which can be dropped due to an incoming
356 * new SYN request when Q0 is full, a new doubly linked list is
357 * introduced. This list allows to select an eager from Q0 in O(1) time.
358 * This is needed to avoid spending too much time walking through the
359 * long list of eagers in Q0 when tcp_drop_q0() is called. Each member of
360 * this new list has to be a member of Q0.
361 * This list is headed by listener's tcp_t. When the list is empty,
362 * both the pointers - tcp_eager_next_drop_q0 and tcp_eager_prev_drop_q0,
363 * of listener's tcp_t point to listener's tcp_t itself.
364 *
365 * Given an eager in Q0 and a listener, MAKE_DROPPABLE() puts the eager
366 * in the list. MAKE_UNDROPPABLE() takes the eager out of the list.
367 * These macros do not affect the eager's membership to Q0.
368 */
369 #define MAKE_DROPPABLE(listener, eager) \
370 if ((eager)->tcp_eager_next_drop_q0 == NULL) { \
371 (listener)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0\
372 = (eager); \
373 (eager)->tcp_eager_prev_drop_q0 = (listener); \
374 (eager)->tcp_eager_next_drop_q0 = \
375 (listener)->tcp_eager_next_drop_q0; \
376 (listener)->tcp_eager_next_drop_q0 = (eager); \
377 }
378
379 #define MAKE_UNDROPPABLE(eager) \
380 if ((eager)->tcp_eager_next_drop_q0 != NULL) { \
381 (eager)->tcp_eager_next_drop_q0->tcp_eager_prev_drop_q0 \
382 = (eager)->tcp_eager_prev_drop_q0; \
383 (eager)->tcp_eager_prev_drop_q0->tcp_eager_next_drop_q0 \
384 = (eager)->tcp_eager_next_drop_q0; \
385 (eager)->tcp_eager_prev_drop_q0 = NULL; \
386 (eager)->tcp_eager_next_drop_q0 = NULL; \
387 }
388
389 /*
390 * The format argument to pass to tcp_display().
391 * DISP_PORT_ONLY means that the returned string has only port info.
392 * DISP_ADDR_AND_PORT means that the returned string also contains the
393 * remote and local IP address.
394 */
395 #define DISP_PORT_ONLY 1
396 #define DISP_ADDR_AND_PORT 2
397
398 #define IP_ADDR_CACHE_SIZE 2048
399 #define IP_ADDR_CACHE_HASH(faddr) \
400 (ntohl(faddr) & (IP_ADDR_CACHE_SIZE -1))
401
402 /* TCP cwnd burst factor. */
403 #define TCP_CWND_INFINITE 65535
404 #define TCP_CWND_SS 3
405 #define TCP_CWND_NORMAL 5
406
407 /*
408 * TCP reassembly macros. We hide starting and ending sequence numbers in
409 * b_next and b_prev of messages on the reassembly queue. The messages are
410 * chained using b_cont. These macros are used in tcp_reass() so we don't
411 * have to see the ugly casts and assignments.
412 */
413 #define TCP_REASS_SEQ(mp) ((uint32_t)(uintptr_t)((mp)->b_next))
414 #define TCP_REASS_SET_SEQ(mp, u) ((mp)->b_next = \
415 (mblk_t *)(uintptr_t)(u))
416 #define TCP_REASS_END(mp) ((uint32_t)(uintptr_t)((mp)->b_prev))
417 #define TCP_REASS_SET_END(mp, u) ((mp)->b_prev = \
418 (mblk_t *)(uintptr_t)(u))
419
420 #define tcps_time_wait_interval tcps_propinfo_tbl[0].prop_cur_uval
421 #define tcps_conn_req_max_q tcps_propinfo_tbl[1].prop_cur_uval
422 #define tcps_conn_req_max_q0 tcps_propinfo_tbl[2].prop_cur_uval
423 #define tcps_conn_req_min tcps_propinfo_tbl[3].prop_cur_uval
424 #define tcps_conn_grace_period tcps_propinfo_tbl[4].prop_cur_uval
425 #define tcps_cwnd_max_ tcps_propinfo_tbl[5].prop_cur_uval
426 #define tcps_dbg tcps_propinfo_tbl[6].prop_cur_uval
427 #define tcps_smallest_nonpriv_port tcps_propinfo_tbl[7].prop_cur_uval
428 #define tcps_ip_abort_cinterval tcps_propinfo_tbl[8].prop_cur_uval
429 #define tcps_ip_abort_linterval tcps_propinfo_tbl[9].prop_cur_uval
430 #define tcps_ip_abort_interval tcps_propinfo_tbl[10].prop_cur_uval
431 #define tcps_ip_notify_cinterval tcps_propinfo_tbl[11].prop_cur_uval
432 #define tcps_ip_notify_interval tcps_propinfo_tbl[12].prop_cur_uval
433 #define tcps_ipv4_ttl tcps_propinfo_tbl[13].prop_cur_uval
434 #define tcps_keepalive_interval_high tcps_propinfo_tbl[14].prop_max_uval
435 #define tcps_keepalive_interval tcps_propinfo_tbl[14].prop_cur_uval
436 #define tcps_keepalive_interval_low tcps_propinfo_tbl[14].prop_min_uval
437 #define tcps_maxpsz_multiplier tcps_propinfo_tbl[15].prop_cur_uval
438 #define tcps_mss_def_ipv4 tcps_propinfo_tbl[16].prop_cur_uval
439 #define tcps_mss_max_ipv4 tcps_propinfo_tbl[17].prop_cur_uval
440 #define tcps_mss_min tcps_propinfo_tbl[18].prop_cur_uval
441 #define tcps_naglim_def tcps_propinfo_tbl[19].prop_cur_uval
442 #define tcps_rexmit_interval_initial_high \
443 tcps_propinfo_tbl[20].prop_max_uval
444 #define tcps_rexmit_interval_initial tcps_propinfo_tbl[20].prop_cur_uval
445 #define tcps_rexmit_interval_initial_low \
446 tcps_propinfo_tbl[20].prop_min_uval
447 #define tcps_rexmit_interval_max_high tcps_propinfo_tbl[21].prop_max_uval
448 #define tcps_rexmit_interval_max tcps_propinfo_tbl[21].prop_cur_uval
449 #define tcps_rexmit_interval_max_low tcps_propinfo_tbl[21].prop_min_uval
450 #define tcps_rexmit_interval_min_high tcps_propinfo_tbl[22].prop_max_uval
451 #define tcps_rexmit_interval_min tcps_propinfo_tbl[22].prop_cur_uval
452 #define tcps_rexmit_interval_min_low tcps_propinfo_tbl[22].prop_min_uval
453 #define tcps_deferred_ack_interval tcps_propinfo_tbl[23].prop_cur_uval
454 #define tcps_snd_lowat_fraction tcps_propinfo_tbl[24].prop_cur_uval
455 #define tcps_dupack_fast_retransmit tcps_propinfo_tbl[25].prop_cur_uval
456 #define tcps_ignore_path_mtu tcps_propinfo_tbl[26].prop_cur_bval
457 #define tcps_smallest_anon_port tcps_propinfo_tbl[27].prop_cur_uval
458 #define tcps_largest_anon_port tcps_propinfo_tbl[28].prop_cur_uval
459 #define tcps_xmit_hiwat tcps_propinfo_tbl[29].prop_cur_uval
460 #define tcps_xmit_lowat tcps_propinfo_tbl[30].prop_cur_uval
461 #define tcps_recv_hiwat tcps_propinfo_tbl[31].prop_cur_uval
462 #define tcps_recv_hiwat_minmss tcps_propinfo_tbl[32].prop_cur_uval
463 #define tcps_fin_wait_2_flush_interval_high \
464 tcps_propinfo_tbl[33].prop_max_uval
465 #define tcps_fin_wait_2_flush_interval tcps_propinfo_tbl[33].prop_cur_uval
466 #define tcps_fin_wait_2_flush_interval_low \
467 tcps_propinfo_tbl[33].prop_min_uval
468 #define tcps_max_buf tcps_propinfo_tbl[34].prop_cur_uval
469 #define tcps_strong_iss tcps_propinfo_tbl[35].prop_cur_uval
470 #define tcps_rtt_updates tcps_propinfo_tbl[36].prop_cur_uval
471 #define tcps_wscale_always tcps_propinfo_tbl[37].prop_cur_bval
472 #define tcps_tstamp_always tcps_propinfo_tbl[38].prop_cur_bval
473 #define tcps_tstamp_if_wscale tcps_propinfo_tbl[39].prop_cur_bval
474 #define tcps_rexmit_interval_extra tcps_propinfo_tbl[40].prop_cur_uval
475 #define tcps_deferred_acks_max tcps_propinfo_tbl[41].prop_cur_uval
476 #define tcps_slow_start_after_idle tcps_propinfo_tbl[42].prop_cur_uval
477 #define tcps_slow_start_initial tcps_propinfo_tbl[43].prop_cur_uval
478 #define tcps_sack_permitted tcps_propinfo_tbl[44].prop_cur_uval
479 #define tcps_ipv6_hoplimit tcps_propinfo_tbl[45].prop_cur_uval
480 #define tcps_mss_def_ipv6 tcps_propinfo_tbl[46].prop_cur_uval
481 #define tcps_mss_max_ipv6 tcps_propinfo_tbl[47].prop_cur_uval
482 #define tcps_rev_src_routes tcps_propinfo_tbl[48].prop_cur_bval
483 #define tcps_local_dack_interval tcps_propinfo_tbl[49].prop_cur_uval
484 #define tcps_local_dacks_max tcps_propinfo_tbl[50].prop_cur_uval
485 #define tcps_ecn_permitted tcps_propinfo_tbl[51].prop_cur_uval
486 #define tcps_rst_sent_rate_enabled tcps_propinfo_tbl[52].prop_cur_bval
487 #define tcps_rst_sent_rate tcps_propinfo_tbl[53].prop_cur_uval
488 #define tcps_push_timer_interval tcps_propinfo_tbl[54].prop_cur_uval
489 #define tcps_use_smss_as_mss_opt tcps_propinfo_tbl[55].prop_cur_bval
490 #define tcps_keepalive_abort_interval_high \
491 tcps_propinfo_tbl[56].prop_max_uval
492 #define tcps_keepalive_abort_interval \
493 tcps_propinfo_tbl[56].prop_cur_uval
494 #define tcps_keepalive_abort_interval_low \
495 tcps_propinfo_tbl[56].prop_min_uval
496 #define tcps_wroff_xtra tcps_propinfo_tbl[57].prop_cur_uval
497 #define tcps_dev_flow_ctl tcps_propinfo_tbl[58].prop_cur_bval
498 #define tcps_reass_timeout tcps_propinfo_tbl[59].prop_cur_uval
499
500 extern struct qinit tcp_rinitv4, tcp_rinitv6;
501 extern boolean_t do_tcp_fusion;
502
503 /*
504 * Object to represent database of options to search passed to
505 * {sock,tpi}optcom_req() interface routine to take care of option
506 * management and associated methods.
507 */
508 extern optdb_obj_t tcp_opt_obj;
509 extern uint_t tcp_max_optsize;
510
511 extern int tcp_squeue_flag;
512
513 extern uint_t tcp_free_list_max_cnt;
514
515 /*
516 * Functions in tcp.c.
517 */
518 extern void tcp_acceptor_hash_insert(t_uscalar_t, tcp_t *);
519 extern tcp_t *tcp_acceptor_hash_lookup(t_uscalar_t, tcp_stack_t *);
520 extern void tcp_acceptor_hash_remove(tcp_t *);
521 extern mblk_t *tcp_ack_mp(tcp_t *);
522 extern int tcp_build_hdrs(tcp_t *);
523 extern void tcp_cleanup(tcp_t *);
524 extern int tcp_clean_death(tcp_t *, int);
525 extern void tcp_clean_death_wrapper(void *, mblk_t *, void *,
526 ip_recv_attr_t *);
527 extern void tcp_close_common(conn_t *, int);
528 extern void tcp_close_detached(tcp_t *);
529 extern void tcp_close_mpp(mblk_t **);
530 extern void tcp_closei_local(tcp_t *);
531 extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **,
532 uint_t *, int *, int, cred_t *);
533 extern conn_t *tcp_create_common(cred_t *, boolean_t, boolean_t, int *);
534 extern void tcp_disconnect(tcp_t *, mblk_t *);
535 extern char *tcp_display(tcp_t *, char *, char);
536 extern int tcp_do_bind(conn_t *, struct sockaddr *, socklen_t, cred_t *,
537 boolean_t);
538 extern int tcp_do_connect(conn_t *, const struct sockaddr *, socklen_t,
539 cred_t *, pid_t);
540 extern int tcp_do_listen(conn_t *, struct sockaddr *, socklen_t, int,
541 cred_t *, boolean_t);
542 extern int tcp_do_unbind(conn_t *);
543 extern boolean_t tcp_eager_blowoff(tcp_t *, t_scalar_t);
544 extern void tcp_eager_cleanup(tcp_t *, boolean_t);
545 extern void tcp_eager_kill(void *, mblk_t *, void *, ip_recv_attr_t *);
546 extern void tcp_eager_unlink(tcp_t *);
547 extern int tcp_getpeername(sock_lower_handle_t, struct sockaddr *,
548 socklen_t *, cred_t *);
549 extern int tcp_getsockname(sock_lower_handle_t, struct sockaddr *,
550 socklen_t *, cred_t *);
551 extern void tcp_init_values(tcp_t *, tcp_t *);
552 extern void tcp_ipsec_cleanup(tcp_t *);
553 extern int tcp_maxpsz_set(tcp_t *, boolean_t);
554 extern void tcp_mss_set(tcp_t *, uint32_t);
555 extern void tcp_reinput(conn_t *, mblk_t *, ip_recv_attr_t *, ip_stack_t *);
556 extern void tcp_rsrv(queue_t *);
557 extern uint_t tcp_rwnd_reopen(tcp_t *);
558 extern int tcp_rwnd_set(tcp_t *, uint32_t);
559 extern int tcp_set_destination(tcp_t *);
560 extern void tcp_set_ws_value(tcp_t *);
561 extern void tcp_stop_lingering(tcp_t *);
562 extern void tcp_update_pmtu(tcp_t *, boolean_t);
563 extern mblk_t *tcp_zcopy_backoff(tcp_t *, mblk_t *, boolean_t);
564 extern boolean_t tcp_zcopy_check(tcp_t *);
565 extern void tcp_zcopy_notify(tcp_t *);
566 extern void tcp_get_proto_props(tcp_t *, struct sock_proto_props *);
567
568 /*
569 * Bind related functions in tcp_bind.c
570 */
571 extern int tcp_bind_check(conn_t *, struct sockaddr *, socklen_t,
572 cred_t *, boolean_t);
573 extern void tcp_bind_hash_insert(tf_t *, tcp_t *, int);
574 extern void tcp_bind_hash_remove(tcp_t *);
575 extern in_port_t tcp_bindi(tcp_t *, in_port_t, const in6_addr_t *,
576 int, boolean_t, boolean_t, boolean_t);
577 extern in_port_t tcp_update_next_port(in_port_t, const tcp_t *,
578 boolean_t);
579
580 /*
581 * Fusion related functions in tcp_fusion.c.
582 */
583 extern void tcp_fuse(tcp_t *, uchar_t *, tcpha_t *);
584 extern void tcp_unfuse(tcp_t *);
585 extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t);
586 extern void tcp_fuse_output_urg(tcp_t *, mblk_t *);
587 extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **);
588 extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t);
589 extern int tcp_fuse_maxpsz(tcp_t *);
590 extern void tcp_fuse_backenable(tcp_t *);
591 extern void tcp_iss_key_init(uint8_t *, int, tcp_stack_t *);
592
593 /*
594 * Output related functions in tcp_output.c.
595 */
596 extern void tcp_close_output(void *, mblk_t *, void *, ip_recv_attr_t *);
597 extern void tcp_output(void *, mblk_t *, void *, ip_recv_attr_t *);
598 extern void tcp_output_urgent(void *, mblk_t *, void *, ip_recv_attr_t *);
599 extern void tcp_rexmit_after_error(tcp_t *);
600 extern void tcp_sack_rexmit(tcp_t *, uint_t *);
601 extern void tcp_send_data(tcp_t *, mblk_t *);
602 extern void tcp_send_synack(void *, mblk_t *, void *, ip_recv_attr_t *);
603 extern void tcp_shutdown_output(void *, mblk_t *, void *, ip_recv_attr_t *);
604 extern void tcp_ss_rexmit(tcp_t *);
605 extern void tcp_update_xmit_tail(tcp_t *, uint32_t);
606 extern void tcp_wput(queue_t *, mblk_t *);
607 extern void tcp_wput_data(tcp_t *, mblk_t *, boolean_t);
608 extern void tcp_wput_sock(queue_t *, mblk_t *);
609 extern void tcp_wput_fallback(queue_t *, mblk_t *);
610 extern void tcp_xmit_ctl(char *, tcp_t *, uint32_t, uint32_t, int);
611 extern void tcp_xmit_listeners_reset(mblk_t *, ip_recv_attr_t *,
612 ip_stack_t *i, conn_t *);
613 extern mblk_t *tcp_xmit_mp(tcp_t *, mblk_t *, int32_t, int32_t *,
614 mblk_t **, uint32_t, boolean_t, uint32_t *, boolean_t);
615
616 /*
617 * Input related functions in tcp_input.c.
618 */
619 extern void tcp_icmp_input(void *, mblk_t *, void *, ip_recv_attr_t *);
620 extern void tcp_input_data(void *, mblk_t *, void *, ip_recv_attr_t *);
621 extern void tcp_input_listener_unbound(void *, mblk_t *, void *,
622 ip_recv_attr_t *);
623 extern boolean_t tcp_paws_check(tcp_t *, tcpha_t *, tcp_opt_t *);
624 extern uint_t tcp_rcv_drain(tcp_t *);
625 extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t, cred_t *);
626 extern boolean_t tcp_verifyicmp(conn_t *, void *, icmph_t *, icmp6_t *,
627 ip_recv_attr_t *);
628
629 /*
630 * Kernel socket related functions in tcp_socket.c.
631 */
632 extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t,
633 so_proto_quiesced_cb_t, sock_quiesce_arg_t *);
634 extern boolean_t tcp_newconn_notify(tcp_t *, ip_recv_attr_t *);
635
636 /*
637 * Timer related functions in tcp_timers.c.
638 */
639 extern void tcp_ack_timer(void *);
640 extern void tcp_close_linger_timeout(void *);
641 extern void tcp_keepalive_timer(void *);
642 extern void tcp_push_timer(void *);
643 extern void tcp_reass_timer(void *);
644 extern mblk_t *tcp_timermp_alloc(int);
645 extern void tcp_timermp_free(tcp_t *);
646 extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), hrtime_t);
647 extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t);
648 extern void tcp_timer(void *arg);
649 extern void tcp_timers_stop(tcp_t *);
650
651 /*
652 * TCP TPI related functions in tcp_tpi.c.
653 */
654 extern void tcp_addr_req(tcp_t *, mblk_t *);
655 extern void tcp_capability_req(tcp_t *, mblk_t *);
656 extern boolean_t tcp_conn_con(tcp_t *, uchar_t *, mblk_t *,
657 mblk_t **, ip_recv_attr_t *);
658 extern void tcp_err_ack(tcp_t *, mblk_t *, int, int);
659 extern void tcp_err_ack_prim(tcp_t *, mblk_t *, int, int, int);
660 extern void tcp_info_req(tcp_t *, mblk_t *);
661 extern void tcp_send_conn_ind(void *, mblk_t *, void *);
662 extern void tcp_send_pending(void *, mblk_t *, void *, ip_recv_attr_t *);
663 extern void tcp_tpi_accept(queue_t *, mblk_t *);
664 extern void tcp_tpi_bind(tcp_t *, mblk_t *);
665 extern int tcp_tpi_close(queue_t *, int);
666 extern int tcp_tpi_close_accept(queue_t *);
667 extern void tcp_tpi_connect(tcp_t *, mblk_t *);
668 extern int tcp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *);
669 extern int tcp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *,
670 uint_t *, uchar_t *, void *, cred_t *);
671 extern void tcp_tpi_unbind(tcp_t *, mblk_t *);
672 extern void tcp_tli_accept(tcp_t *, mblk_t *);
673 extern void tcp_use_pure_tpi(tcp_t *);
674 extern void tcp_do_capability_ack(tcp_t *, struct T_capability_ack *,
675 t_uscalar_t);
676
677 /*
678 * TCP option processing related functions in tcp_opt_data.c
679 */
680 extern int tcp_opt_default(queue_t *, t_scalar_t, t_scalar_t, uchar_t *);
681 extern int tcp_opt_get(conn_t *, int, int, uchar_t *);
682 extern int tcp_opt_set(conn_t *, uint_t, int, int, uint_t, uchar_t *,
683 uint_t *, uchar_t *, void *, cred_t *);
684
685 /*
686 * TCP time wait processing related functions in tcp_time_wait.c.
687 */
688 extern void tcp_time_wait_append(tcp_t *);
689 extern void tcp_time_wait_collector(void *);
690 extern boolean_t tcp_time_wait_remove(tcp_t *, tcp_squeue_priv_t *);
691 extern void tcp_time_wait_processing(tcp_t *, mblk_t *, uint32_t,
692 uint32_t, int, tcpha_t *, ip_recv_attr_t *);
693
694 /*
695 * Misc functions in tcp_misc.c.
696 */
697 extern uint32_t tcp_find_listener_conf(tcp_stack_t *, in_port_t);
698 extern void tcp_ioctl_abort_conn(queue_t *, mblk_t *);
699 extern void tcp_listener_conf_cleanup(tcp_stack_t *);
700 extern void tcp_stack_cpu_add(tcp_stack_t *, processorid_t);
701
702 #endif /* _KERNEL */
703
704 #ifdef __cplusplus
705 }
706 #endif
707
708 #endif /* _INET_TCP_IMPL_H */
