1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _INET_TCP_IMPL_H
#define _INET_TCP_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* TCP implementation private declarations. These interfaces are
* used to build the IP module and are not meant to be accessed
* by any modules except IP itself. They are undocumented and are
* subject to change without notice.
*/
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _KERNEL
#include <inet/tcp.h>
#define TCP_MOD_ID 5105
/*
* Was this tcp created via socket() interface?
*/
#define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket)
/*
* Is this tcp not attached to any upper client?
*/
#define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached)
#define TCP_TIMER(tcp, f, tim) \
tcp_timeout(tcp->tcp_connp, f, tim)
#define TCP_TIMER_CANCEL(tcp, id) \
tcp_timeout_cancel(tcp->tcp_connp, id)
/*
* To restart the TCP retransmission timer.
*/
#define TCP_TIMER_RESTART(tcp, intvl) { \
if ((tcp)->tcp_timer_tid != 0) \
(void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \
(tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, \
MSEC_TO_TICK(intvl)); \
}
/*
* This stops synchronous streams for a fused tcp endpoint
* and prevents tcp_fuse_rrw() from pulling data from it.
*/
#define TCP_FUSE_SYNCSTR_STOP(tcp) { \
if ((tcp)->tcp_direct_sockfs) { \
mutex_enter(&(tcp)->tcp_non_sq_lock); \
(tcp)->tcp_fuse_syncstr_stopped = B_TRUE; \
mutex_exit(&(tcp)->tcp_non_sq_lock); \
} \
}
/*
* This causes all calls to tcp_fuse_rrw() to block until
* TCP_FUSE_SYNCSTR_UNPLUG_DRAIN() is called.
*/
#define TCP_FUSE_SYNCSTR_PLUG_DRAIN(tcp) { \
if ((tcp)->tcp_direct_sockfs) { \
mutex_enter(&(tcp)->tcp_non_sq_lock); \
ASSERT(!(tcp)->tcp_fuse_syncstr_plugged); \
(tcp)->tcp_fuse_syncstr_plugged = B_TRUE; \
mutex_exit(&(tcp)->tcp_non_sq_lock); \
} \
}
/*
* This unplugs the draining of data through tcp_fuse_rrw(); see
* the comments in tcp_fuse_rrw() for how we preserve ordering.
*/
#define TCP_FUSE_SYNCSTR_UNPLUG_DRAIN(tcp) { \
if ((tcp)->tcp_direct_sockfs) { \
mutex_enter(&(tcp)->tcp_non_sq_lock); \
(tcp)->tcp_fuse_syncstr_plugged = B_FALSE; \
(void) cv_broadcast(&(tcp)->tcp_fuse_plugcv); \
mutex_exit(&(tcp)->tcp_non_sq_lock); \
} \
}
/*
* Before caching the conn IRE, we need to make sure certain TCP
* states are in sync with the ire. The mismatch could occur if the
* TCP state has been set in tcp_adapt_ire() using a different IRE,
* e.g if an address was not present during an initial connect(),
* tcp_adapt_ire() will set the state using the interface route.
* Subsequently, if the address is added to the local machine, the
* retransmitted SYN will get the correct (loopback) IRE, but the TCP
* state (tcp_loopback and tcp_localnet) will remain out of sync.
* This is especially an issue with TCP fusion which relies on the
* TCP state to be accurate.
*
* This check/change should be made only if the TCP is not yet in
* the established state, else it would lead to inconsistencies.
*/
#define TCP_CHECK_IREINFO(tcp, ire) { \
if ((tcp)->tcp_state < TCPS_ESTABLISHED) { \
if (((ire)->ire_type & (IRE_LOOPBACK | \
IRE_LOCAL)) && !(tcp)->tcp_loopback) { \
(tcp)->tcp_loopback = B_TRUE; \
} else if ((tcp)->tcp_loopback && \
!((ire)->ire_type & (IRE_LOOPBACK | IRE_LOCAL))) { \
(tcp)->tcp_loopback = B_FALSE; \
} \
if ((tcp)->tcp_ipversion == IPV4_VERSION) { \
(tcp)->tcp_localnet = \
((ire)->ire_gateway_addr == 0); \
} else { \
(tcp)->tcp_localnet = \
IN6_IS_ADDR_UNSPECIFIED( \
&(ire)->ire_gateway_addr_v6); \
} \
} \
}
/*
* Write-side flow-control is implemented via the per instance STREAMS
* write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s)
* and clearing QFULL and calling qbackenable() to restart the flow based
* on the number of TCP unsent bytes (i.e. those not on the wire waiting
* for a remote ACK).
*
* This is different than a standard STREAMS kmod which when using the
* STREAMS Q the framework would automatictly flow-control based on the
* defined hiwat/lowat values as mblk_t's are enqueued/dequeued.
*
* As of FireEngine TCP write-side flow-control needs to take into account
* both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes
* (i.e. from tcp_wput() -> tcp_output()).
*
* This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to
* count the number of bytes enqueued by tcp_wput() and the number of bytes
* dequeued and processed by tcp_output().
*
* So, the total number of bytes unsent is (squeue_bytes + unsent) with all
* flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES.
*/
extern void tcp_clrqfull(tcp_t *);
extern void tcp_setqfull(tcp_t *);
#define TCP_UNSENT_BYTES(tcp) \
((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent)
/* Named Dispatch Parameter Management Structure */
typedef struct tcpparam_s {
uint32_t tcp_param_min;
uint32_t tcp_param_max;
uint32_t tcp_param_val;
char *tcp_param_name;
} tcpparam_t;
#define tcps_time_wait_interval tcps_params[0].tcp_param_val
#define tcps_conn_req_max_q tcps_params[1].tcp_param_val
#define tcps_conn_req_max_q0 tcps_params[2].tcp_param_val
#define tcps_conn_req_min tcps_params[3].tcp_param_val
#define tcps_conn_grace_period tcps_params[4].tcp_param_val
#define tcps_cwnd_max_ tcps_params[5].tcp_param_val
#define tcps_dbg tcps_params[6].tcp_param_val
#define tcps_smallest_nonpriv_port tcps_params[7].tcp_param_val
#define tcps_ip_abort_cinterval tcps_params[8].tcp_param_val
#define tcps_ip_abort_linterval tcps_params[9].tcp_param_val
#define tcps_ip_abort_interval tcps_params[10].tcp_param_val
#define tcps_ip_notify_cinterval tcps_params[11].tcp_param_val
#define tcps_ip_notify_interval tcps_params[12].tcp_param_val
#define tcps_ipv4_ttl tcps_params[13].tcp_param_val
#define tcps_keepalive_interval_high tcps_params[14].tcp_param_max
#define tcps_keepalive_interval tcps_params[14].tcp_param_val
#define tcps_keepalive_interval_low tcps_params[14].tcp_param_min
#define tcps_maxpsz_multiplier tcps_params[15].tcp_param_val
#define tcps_mss_def_ipv4 tcps_params[16].tcp_param_val
#define tcps_mss_max_ipv4 tcps_params[17].tcp_param_val
#define tcps_mss_min tcps_params[18].tcp_param_val
#define tcps_naglim_def tcps_params[19].tcp_param_val
#define tcps_rexmit_interval_initial tcps_params[20].tcp_param_val
#define tcps_rexmit_interval_max tcps_params[21].tcp_param_val
#define tcps_rexmit_interval_min tcps_params[22].tcp_param_val
#define tcps_deferred_ack_interval tcps_params[23].tcp_param_val
#define tcps_snd_lowat_fraction tcps_params[24].tcp_param_val
#define tcps_sth_rcv_hiwat tcps_params[25].tcp_param_val
#define __tcps_not_used1 tcps_params[26].tcp_param_val
#define tcps_dupack_fast_retransmit tcps_params[27].tcp_param_val
#define tcps_ignore_path_mtu tcps_params[28].tcp_param_val
#define tcps_smallest_anon_port tcps_params[29].tcp_param_val
#define tcps_largest_anon_port tcps_params[30].tcp_param_val
#define tcps_xmit_hiwat tcps_params[31].tcp_param_val
#define tcps_xmit_lowat tcps_params[32].tcp_param_val
#define tcps_recv_hiwat tcps_params[33].tcp_param_val
#define tcps_recv_hiwat_minmss tcps_params[34].tcp_param_val
#define tcps_fin_wait_2_flush_interval tcps_params[35].tcp_param_val
#define __tcps_not_used2 tcps_params[36].tcp_param_val
#define tcps_max_buf tcps_params[37].tcp_param_val
#define tcps_strong_iss tcps_params[38].tcp_param_val
#define tcps_rtt_updates tcps_params[39].tcp_param_val
#define tcps_wscale_always tcps_params[40].tcp_param_val
#define tcps_tstamp_always tcps_params[41].tcp_param_val
#define tcps_tstamp_if_wscale tcps_params[42].tcp_param_val
#define tcps_rexmit_interval_extra tcps_params[43].tcp_param_val
#define tcps_deferred_acks_max tcps_params[44].tcp_param_val
#define tcps_slow_start_after_idle tcps_params[45].tcp_param_val
#define tcps_slow_start_initial tcps_params[46].tcp_param_val
#define tcps_co_timer_interval tcps_params[47].tcp_param_val
#define tcps_sack_permitted tcps_params[48].tcp_param_val
#define tcps_trace tcps_params[49].tcp_param_val
#define __tcps_not_used4 tcps_params[50].tcp_param_val
#define tcps_ipv6_hoplimit tcps_params[51].tcp_param_val
#define tcps_mss_def_ipv6 tcps_params[52].tcp_param_val
#define tcps_mss_max_ipv6 tcps_params[53].tcp_param_val
#define tcps_rev_src_routes tcps_params[54].tcp_param_val
#define tcps_local_dack_interval tcps_params[55].tcp_param_val
#define tcps_ndd_get_info_interval tcps_params[56].tcp_param_val
#define tcps_local_dacks_max tcps_params[57].tcp_param_val
#define tcps_ecn_permitted tcps_params[58].tcp_param_val
#define tcps_rst_sent_rate_enabled tcps_params[59].tcp_param_val
#define tcps_rst_sent_rate tcps_params[60].tcp_param_val
#define tcps_push_timer_interval tcps_params[61].tcp_param_val
#define tcps_use_smss_as_mss_opt tcps_params[62].tcp_param_val
#define tcps_keepalive_abort_interval_high tcps_params[63].tcp_param_max
#define tcps_keepalive_abort_interval tcps_params[63].tcp_param_val
#define tcps_keepalive_abort_interval_low tcps_params[63].tcp_param_min
extern struct qinit tcp_loopback_rinit, tcp_rinitv4, tcp_rinitv6;
extern boolean_t do_tcp_fusion;
extern int tcp_maxpsz_set(tcp_t *, boolean_t);
extern void tcp_timers_stop(tcp_t *);
extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t);
extern void tcp_push_timer(void *);
extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), clock_t);
extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t);
extern void tcp_fuse(tcp_t *, uchar_t *, tcph_t *);
extern void tcp_unfuse(tcp_t *);
extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t);
extern void tcp_fuse_output_urg(tcp_t *, mblk_t *);
extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **);
extern void tcp_fuse_syncstr_enable_pair(tcp_t *);
extern void tcp_fuse_disable_pair(tcp_t *, boolean_t);
extern int tcp_fuse_rrw(queue_t *, struiod_t *);
extern int tcp_fuse_rinfop(queue_t *, infod_t *);
extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t);
extern int tcp_fuse_maxpsz_set(tcp_t *);
/*
* Object to represent database of options to search passed to
* {sock,tpi}optcom_req() interface routine to take care of option
* management and associated methods.
*/
extern optdb_obj_t tcp_opt_obj;
extern uint_t tcp_max_optsize;
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _INET_TCP_IMPL_H */
|
