Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0-or-later */
2 : /*
3 : * INET An implementation of the TCP/IP protocol suite for the LINUX
4 : * operating system. INET is implemented using the BSD Socket
5 : * interface as the means of communication with the user level.
6 : *
7 : * Definitions for the TCP protocol.
8 : *
9 : * Version: @(#)tcp.h 1.0.2 04/28/93
10 : *
11 : * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 : */
13 : #ifndef _LINUX_TCP_H
14 : #define _LINUX_TCP_H
15 :
16 :
17 : #include <linux/skbuff.h>
18 : #include <linux/win_minmax.h>
19 : #include <net/sock.h>
20 : #include <net/inet_connection_sock.h>
21 : #include <net/inet_timewait_sock.h>
22 : #include <uapi/linux/tcp.h>
23 :
24 2046 : static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb)
25 : {
26 1182 : return (struct tcphdr *)skb_transport_header(skb);
27 : }
28 :
29 872 : static inline unsigned int __tcp_hdrlen(const struct tcphdr *th)
30 : {
31 872 : return th->doff * 4;
32 : }
33 :
34 434 : static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
35 : {
36 434 : return __tcp_hdrlen(tcp_hdr(skb));
37 : }
38 :
39 0 : static inline struct tcphdr *inner_tcp_hdr(const struct sk_buff *skb)
40 : {
41 0 : return (struct tcphdr *)skb_inner_transport_header(skb);
42 : }
43 :
44 0 : static inline unsigned int inner_tcp_hdrlen(const struct sk_buff *skb)
45 : {
46 0 : return inner_tcp_hdr(skb)->doff * 4;
47 : }
48 :
49 : static inline unsigned int tcp_optlen(const struct sk_buff *skb)
50 : {
51 : return (tcp_hdr(skb)->doff - 5) * 4;
52 : }
53 :
54 : /* TCP Fast Open */
55 : #define TCP_FASTOPEN_COOKIE_MIN 4 /* Min Fast Open Cookie size in bytes */
56 : #define TCP_FASTOPEN_COOKIE_MAX 16 /* Max Fast Open Cookie size in bytes */
57 : #define TCP_FASTOPEN_COOKIE_SIZE 8 /* the size employed by this impl. */
58 :
59 : /* TCP Fast Open Cookie as stored in memory */
60 : struct tcp_fastopen_cookie {
61 : __le64 val[DIV_ROUND_UP(TCP_FASTOPEN_COOKIE_MAX, sizeof(u64))];
62 : s8 len;
63 : bool exp; /* In RFC6994 experimental option format */
64 : };
65 :
66 : /* This defines a selective acknowledgement block. */
67 : struct tcp_sack_block_wire {
68 : __be32 start_seq;
69 : __be32 end_seq;
70 : };
71 :
72 : struct tcp_sack_block {
73 : u32 start_seq;
74 : u32 end_seq;
75 : };
76 :
77 : /*These are used to set the sack_ok field in struct tcp_options_received */
78 : #define TCP_SACK_SEEN (1 << 0) /*1 = peer is SACK capable, */
79 : #define TCP_DSACK_SEEN (1 << 2) /*1 = DSACK was received from peer*/
80 :
81 : struct tcp_options_received {
82 : /* PAWS/RTTM data */
83 : int ts_recent_stamp;/* Time we stored ts_recent (for aging) */
84 : u32 ts_recent; /* Time stamp to echo next */
85 : u32 rcv_tsval; /* Time stamp value */
86 : u32 rcv_tsecr; /* Time stamp echo reply */
87 : u16 saw_tstamp : 1, /* Saw TIMESTAMP on last packet */
88 : tstamp_ok : 1, /* TIMESTAMP seen on SYN packet */
89 : dsack : 1, /* D-SACK is scheduled */
90 : wscale_ok : 1, /* Wscale seen on SYN packet */
91 : sack_ok : 3, /* SACK seen on SYN packet */
92 : smc_ok : 1, /* SMC seen on SYN packet */
93 : snd_wscale : 4, /* Window scaling received from sender */
94 : rcv_wscale : 4; /* Window scaling to send to receiver */
95 : u8 saw_unknown:1, /* Received unknown option */
96 : unused:7;
97 : u8 num_sacks; /* Number of SACK blocks */
98 : u16 user_mss; /* mss requested by user in ioctl */
99 : u16 mss_clamp; /* Maximal mss, negotiated at connection setup */
100 : };
101 :
102 4 : static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
103 : {
104 4 : rx_opt->tstamp_ok = rx_opt->sack_ok = 0;
105 4 : rx_opt->wscale_ok = rx_opt->snd_wscale = 0;
106 : #if IS_ENABLED(CONFIG_SMC)
107 : rx_opt->smc_ok = 0;
108 : #endif
109 0 : }
110 :
111 : /* This is the max number of SACKS that we'll generate and process. It's safe
112 : * to increase this, although since:
113 : * size = TCPOLEN_SACK_BASE_ALIGNED (4) + n * TCPOLEN_SACK_PERBLOCK (8)
114 : * only four options will fit in a standard TCP header */
115 : #define TCP_NUM_SACKS 4
116 :
117 : struct tcp_request_sock_ops;
118 :
119 : struct tcp_request_sock {
120 : struct inet_request_sock req;
121 : const struct tcp_request_sock_ops *af_specific;
122 : u64 snt_synack; /* first SYNACK sent time */
123 : bool tfo_listener;
124 : bool is_mptcp;
125 : #if IS_ENABLED(CONFIG_MPTCP)
126 : bool drop_req;
127 : #endif
128 : u32 txhash;
129 : u32 rcv_isn;
130 : u32 snt_isn;
131 : u32 ts_off;
132 : u32 last_oow_ack_time; /* last SYNACK */
133 : u32 rcv_nxt; /* the ack # by SYNACK. For
134 : * FastOpen it's the seq#
135 : * after data-in-SYN.
136 : */
137 : u8 syn_tos;
138 : };
139 :
140 68 : static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req)
141 : {
142 52 : return (struct tcp_request_sock *)req;
143 : }
144 :
145 : struct tcp_sock {
146 : /* inet_connection_sock has to be the first member of tcp_sock */
147 : struct inet_connection_sock inet_conn;
148 : u16 tcp_header_len; /* Bytes of tcp header to send */
149 : u16 gso_segs; /* Max number of segs per GSO packet */
150 :
151 : /*
152 : * Header prediction flags
153 : * 0x5?10 << 16 + snd_wnd in net byte order
154 : */
155 : __be32 pred_flags;
156 :
157 : /*
158 : * RFC793 variables by their proper names. This means you can
159 : * read the code and the spec side by side (and laugh ...)
160 : * See RFC793 and RFC1122. The RFC writes these in capitals.
161 : */
162 : u64 bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived
163 : * sum(delta(rcv_nxt)), or how many bytes
164 : * were acked.
165 : */
166 : u32 segs_in; /* RFC4898 tcpEStatsPerfSegsIn
167 : * total number of segments in.
168 : */
169 : u32 data_segs_in; /* RFC4898 tcpEStatsPerfDataSegsIn
170 : * total number of data segments in.
171 : */
172 : u32 rcv_nxt; /* What we want to receive next */
173 : u32 copied_seq; /* Head of yet unread data */
174 : u32 rcv_wup; /* rcv_nxt on last window update sent */
175 : u32 snd_nxt; /* Next sequence we send */
176 : u32 segs_out; /* RFC4898 tcpEStatsPerfSegsOut
177 : * The total number of segments sent.
178 : */
179 : u32 data_segs_out; /* RFC4898 tcpEStatsPerfDataSegsOut
180 : * total number of data segments sent.
181 : */
182 : u64 bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut
183 : * total number of data bytes sent.
184 : */
185 : u64 bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked
186 : * sum(delta(snd_una)), or how many bytes
187 : * were acked.
188 : */
189 : u32 dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups
190 : * total number of DSACK blocks received
191 : */
192 : u32 snd_una; /* First byte we want an ack for */
193 : u32 snd_sml; /* Last byte of the most recently transmitted small packet */
194 : u32 rcv_tstamp; /* timestamp of last received ACK (for keepalives) */
195 : u32 lsndtime; /* timestamp of last sent data packet (for restart window) */
196 : u32 last_oow_ack_time; /* timestamp of last out-of-window ACK */
197 : u32 compressed_ack_rcv_nxt;
198 :
199 : u32 tsoffset; /* timestamp offset */
200 :
201 : struct list_head tsq_node; /* anchor in tsq_tasklet.head list */
202 : struct list_head tsorted_sent_queue; /* time-sorted sent but un-SACKed skbs */
203 :
204 : u32 snd_wl1; /* Sequence for window update */
205 : u32 snd_wnd; /* The window we expect to receive */
206 : u32 max_window; /* Maximal window ever seen from peer */
207 : u32 mss_cache; /* Cached effective mss, not including SACKS */
208 :
209 : u32 window_clamp; /* Maximal window to advertise */
210 : u32 rcv_ssthresh; /* Current window clamp */
211 :
212 : /* Information of the most recently (s)acked skb */
213 : struct tcp_rack {
214 : u64 mstamp; /* (Re)sent time of the skb */
215 : u32 rtt_us; /* Associated RTT */
216 : u32 end_seq; /* Ending TCP sequence of the skb */
217 : u32 last_delivered; /* tp->delivered at last reo_wnd adj */
218 : u8 reo_wnd_steps; /* Allowed reordering window */
219 : #define TCP_RACK_RECOVERY_THRESH 16
220 : u8 reo_wnd_persist:5, /* No. of recovery since last adj */
221 : dsack_seen:1, /* Whether DSACK seen after last adj */
222 : advanced:1; /* mstamp advanced since last lost marking */
223 : } rack;
224 : u16 advmss; /* Advertised MSS */
225 : u8 compressed_ack;
226 : u8 dup_ack_counter:2,
227 : tlp_retrans:1, /* TLP is a retransmission */
228 : unused:5;
229 : u32 chrono_start; /* Start time in jiffies of a TCP chrono */
230 : u32 chrono_stat[3]; /* Time in jiffies for chrono_stat stats */
231 : u8 chrono_type:2, /* current chronograph type */
232 : rate_app_limited:1, /* rate_{delivered,interval_us} limited? */
233 : fastopen_connect:1, /* FASTOPEN_CONNECT sockopt */
234 : fastopen_no_cookie:1, /* Allow send/recv SYN+data without a cookie */
235 : is_sack_reneg:1, /* in recovery from loss with SACK reneg? */
236 : fastopen_client_fail:2; /* reason why fastopen failed */
237 : u8 nonagle : 4,/* Disable Nagle algorithm? */
238 : thin_lto : 1,/* Use linear timeouts for thin streams */
239 : recvmsg_inq : 1,/* Indicate # of bytes in queue upon recvmsg */
240 : repair : 1,
241 : frto : 1;/* F-RTO (RFC5682) activated in CA_Loss */
242 : u8 repair_queue;
243 : u8 save_syn:2, /* Save headers of SYN packet */
244 : syn_data:1, /* SYN includes data */
245 : syn_fastopen:1, /* SYN includes Fast Open option */
246 : syn_fastopen_exp:1,/* SYN includes Fast Open exp. option */
247 : syn_fastopen_ch:1, /* Active TFO re-enabling probe */
248 : syn_data_acked:1,/* data in SYN is acked by SYN-ACK */
249 : is_cwnd_limited:1;/* forward progress limited by snd_cwnd? */
250 : u32 tlp_high_seq; /* snd_nxt at the time of TLP */
251 :
252 : u32 tcp_tx_delay; /* delay (in usec) added to TX packets */
253 : u64 tcp_wstamp_ns; /* departure time for next sent data packet */
254 : u64 tcp_clock_cache; /* cache last tcp_clock_ns() (see tcp_mstamp_refresh()) */
255 :
256 : /* RTT measurement */
257 : u64 tcp_mstamp; /* most recent packet received/sent */
258 : u32 srtt_us; /* smoothed round trip time << 3 in usecs */
259 : u32 mdev_us; /* medium deviation */
260 : u32 mdev_max_us; /* maximal mdev for the last rtt period */
261 : u32 rttvar_us; /* smoothed mdev_max */
262 : u32 rtt_seq; /* sequence number to update rttvar */
263 : struct minmax rtt_min;
264 :
265 : u32 packets_out; /* Packets which are "in flight" */
266 : u32 retrans_out; /* Retransmitted packets out */
267 : u32 max_packets_out; /* max packets_out in last window */
268 : u32 max_packets_seq; /* right edge of max_packets_out flight */
269 :
270 : u16 urg_data; /* Saved octet of OOB data and control flags */
271 : u8 ecn_flags; /* ECN status bits. */
272 : u8 keepalive_probes; /* num of allowed keep alive probes */
273 : u32 reordering; /* Packet reordering metric. */
274 : u32 reord_seen; /* number of data packet reordering events */
275 : u32 snd_up; /* Urgent pointer */
276 :
277 : /*
278 : * Options received (usually on last packet, some only on SYN packets).
279 : */
280 : struct tcp_options_received rx_opt;
281 :
282 : /*
283 : * Slow start and congestion control (see also Nagle, and Karn & Partridge)
284 : */
285 : u32 snd_ssthresh; /* Slow start size threshold */
286 : u32 snd_cwnd; /* Sending congestion window */
287 : u32 snd_cwnd_cnt; /* Linear increase counter */
288 : u32 snd_cwnd_clamp; /* Do not allow snd_cwnd to grow above this */
289 : u32 snd_cwnd_used;
290 : u32 snd_cwnd_stamp;
291 : u32 prior_cwnd; /* cwnd right before starting loss recovery */
292 : u32 prr_delivered; /* Number of newly delivered packets to
293 : * receiver in Recovery. */
294 : u32 prr_out; /* Total number of pkts sent during Recovery. */
295 : u32 delivered; /* Total data packets delivered incl. rexmits */
296 : u32 delivered_ce; /* Like the above but only ECE marked packets */
297 : u32 lost; /* Total data packets lost incl. rexmits */
298 : u32 app_limited; /* limited until "delivered" reaches this val */
299 : u64 first_tx_mstamp; /* start of window send phase */
300 : u64 delivered_mstamp; /* time we reached "delivered" */
301 : u32 rate_delivered; /* saved rate sample: packets delivered */
302 : u32 rate_interval_us; /* saved rate sample: time elapsed */
303 :
304 : u32 rcv_wnd; /* Current receiver window */
305 : u32 write_seq; /* Tail(+1) of data held in tcp send buffer */
306 : u32 notsent_lowat; /* TCP_NOTSENT_LOWAT */
307 : u32 pushed_seq; /* Last pushed seq, required to talk to windows */
308 : u32 lost_out; /* Lost packets */
309 : u32 sacked_out; /* SACK'd packets */
310 :
311 : struct hrtimer pacing_timer;
312 : struct hrtimer compressed_ack_timer;
313 :
314 : /* from STCP, retrans queue hinting */
315 : struct sk_buff* lost_skb_hint;
316 : struct sk_buff *retransmit_skb_hint;
317 :
318 : /* OOO segments go in this rbtree. Socket lock must be held. */
319 : struct rb_root out_of_order_queue;
320 : struct sk_buff *ooo_last_skb; /* cache rb_last(out_of_order_queue) */
321 :
322 : /* SACKs data, these 2 need to be together (see tcp_options_write) */
323 : struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */
324 : struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/
325 :
326 : struct tcp_sack_block recv_sack_cache[4];
327 :
328 : struct sk_buff *highest_sack; /* skb just after the highest
329 : * skb with SACKed bit set
330 : * (validity guaranteed only if
331 : * sacked_out > 0)
332 : */
333 :
334 : int lost_cnt_hint;
335 :
336 : u32 prior_ssthresh; /* ssthresh saved at recovery start */
337 : u32 high_seq; /* snd_nxt at onset of congestion */
338 :
339 : u32 retrans_stamp; /* Timestamp of the last retransmit,
340 : * also used in SYN-SENT to remember stamp of
341 : * the first SYN. */
342 : u32 undo_marker; /* snd_una upon a new recovery episode. */
343 : int undo_retrans; /* number of undoable retransmissions. */
344 : u64 bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans
345 : * Total data bytes retransmitted
346 : */
347 : u32 total_retrans; /* Total retransmits for entire connection */
348 :
349 : u32 urg_seq; /* Seq of received urgent pointer */
350 : unsigned int keepalive_time; /* time before keep alive takes place */
351 : unsigned int keepalive_intvl; /* time interval between keep alive probes */
352 :
353 : int linger2;
354 :
355 :
356 : /* Sock_ops bpf program related variables */
357 : #ifdef CONFIG_BPF
358 : u8 bpf_sock_ops_cb_flags; /* Control calling BPF programs
359 : * values defined in uapi/linux/tcp.h
360 : */
361 : #define BPF_SOCK_OPS_TEST_FLAG(TP, ARG) (TP->bpf_sock_ops_cb_flags & ARG)
362 : #else
363 : #define BPF_SOCK_OPS_TEST_FLAG(TP, ARG) 0
364 : #endif
365 :
366 : u16 timeout_rehash; /* Timeout-triggered rehash attempts */
367 :
368 : u32 rcv_ooopack; /* Received out-of-order packets, for tcpinfo */
369 :
370 : /* Receiver side RTT estimation */
371 : u32 rcv_rtt_last_tsecr;
372 : struct {
373 : u32 rtt_us;
374 : u32 seq;
375 : u64 time;
376 : } rcv_rtt_est;
377 :
378 : /* Receiver queue space */
379 : struct {
380 : u32 space;
381 : u32 seq;
382 : u64 time;
383 : } rcvq_space;
384 :
385 : /* TCP-specific MTU probe information. */
386 : struct {
387 : u32 probe_seq_start;
388 : u32 probe_seq_end;
389 : } mtu_probe;
390 : u32 mtu_info; /* We received an ICMP_FRAG_NEEDED / ICMPV6_PKT_TOOBIG
391 : * while socket was owned by user.
392 : */
393 : #if IS_ENABLED(CONFIG_MPTCP)
394 : bool is_mptcp;
395 : #endif
396 : #if IS_ENABLED(CONFIG_SMC)
397 : bool syn_smc; /* SYN includes SMC */
398 : #endif
399 :
400 : #ifdef CONFIG_TCP_MD5SIG
401 : /* TCP AF-Specific parts; only used by MD5 Signature support so far */
402 : const struct tcp_sock_af_ops *af_specific;
403 :
404 : /* TCP MD5 Signature Option information */
405 : struct tcp_md5sig_info __rcu *md5sig_info;
406 : #endif
407 :
408 : /* TCP fastopen related information */
409 : struct tcp_fastopen_request *fastopen_req;
410 : /* fastopen_rsk points to request_sock that resulted in this big
411 : * socket. Used to retransmit SYNACKs etc.
412 : */
413 : struct request_sock __rcu *fastopen_rsk;
414 : struct saved_syn *saved_syn;
415 : };
416 :
417 : enum tsq_enum {
418 : TSQ_THROTTLED,
419 : TSQ_QUEUED,
420 : TCP_TSQ_DEFERRED, /* tcp_tasklet_func() found socket was owned */
421 : TCP_WRITE_TIMER_DEFERRED, /* tcp_write_timer() found socket was owned */
422 : TCP_DELACK_TIMER_DEFERRED, /* tcp_delack_timer() found socket was owned */
423 : TCP_MTU_REDUCED_DEFERRED, /* tcp_v{4|6}_err() could not call
424 : * tcp_v{4|6}_mtu_reduced()
425 : */
426 : };
427 :
428 : enum tsq_flags {
429 : TSQF_THROTTLED = (1UL << TSQ_THROTTLED),
430 : TSQF_QUEUED = (1UL << TSQ_QUEUED),
431 : TCPF_TSQ_DEFERRED = (1UL << TCP_TSQ_DEFERRED),
432 : TCPF_WRITE_TIMER_DEFERRED = (1UL << TCP_WRITE_TIMER_DEFERRED),
433 : TCPF_DELACK_TIMER_DEFERRED = (1UL << TCP_DELACK_TIMER_DEFERRED),
434 : TCPF_MTU_REDUCED_DEFERRED = (1UL << TCP_MTU_REDUCED_DEFERRED),
435 : };
436 :
437 25722 : static inline struct tcp_sock *tcp_sk(const struct sock *sk)
438 : {
439 25070 : return (struct tcp_sock *)sk;
440 : }
441 :
442 : struct tcp_timewait_sock {
443 : struct inet_timewait_sock tw_sk;
444 : #define tw_rcv_nxt tw_sk.__tw_common.skc_tw_rcv_nxt
445 : #define tw_snd_nxt tw_sk.__tw_common.skc_tw_snd_nxt
446 : u32 tw_rcv_wnd;
447 : u32 tw_ts_offset;
448 : u32 tw_ts_recent;
449 :
450 : /* The time we sent the last out-of-window ACK: */
451 : u32 tw_last_oow_ack_time;
452 :
453 : int tw_ts_recent_stamp;
454 : u32 tw_tx_delay;
455 : #ifdef CONFIG_TCP_MD5SIG
456 : struct tcp_md5sig_key *tw_md5_key;
457 : #endif
458 : };
459 :
460 0 : static inline struct tcp_timewait_sock *tcp_twsk(const struct sock *sk)
461 : {
462 0 : return (struct tcp_timewait_sock *)sk;
463 : }
464 :
465 0 : static inline bool tcp_passive_fastopen(const struct sock *sk)
466 : {
467 0 : return sk->sk_state == TCP_SYN_RECV &&
468 0 : rcu_access_pointer(tcp_sk(sk)->fastopen_rsk) != NULL;
469 : }
470 :
471 1 : static inline void fastopen_queue_tune(struct sock *sk, int backlog)
472 : {
473 1 : struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue;
474 1 : int somaxconn = READ_ONCE(sock_net(sk)->core.sysctl_somaxconn);
475 :
476 1 : queue->fastopenq.max_qlen = min_t(unsigned int, backlog, somaxconn);
477 1 : }
478 :
479 4 : static inline void tcp_move_syn(struct tcp_sock *tp,
480 : struct request_sock *req)
481 : {
482 4 : tp->saved_syn = req->saved_syn;
483 4 : req->saved_syn = NULL;
484 : }
485 :
486 4 : static inline void tcp_saved_syn_free(struct tcp_sock *tp)
487 : {
488 4 : kfree(tp->saved_syn);
489 4 : tp->saved_syn = NULL;
490 : }
491 :
492 0 : static inline u32 tcp_saved_syn_len(const struct saved_syn *saved_syn)
493 : {
494 0 : return saved_syn->mac_hdrlen + saved_syn->network_hdrlen +
495 0 : saved_syn->tcp_hdrlen;
496 : }
497 :
498 : struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk,
499 : const struct sk_buff *orig_skb,
500 : const struct sk_buff *ack_skb);
501 :
502 12 : static inline u16 tcp_mss_clamp(const struct tcp_sock *tp, u16 mss)
503 : {
504 : /* We use READ_ONCE() here because socket might not be locked.
505 : * This happens for listeners.
506 : */
507 12 : u16 user_mss = READ_ONCE(tp->rx_opt.user_mss);
508 :
509 12 : return (user_mss && user_mss < mss) ? user_mss : mss;
510 : }
511 :
512 : int tcp_skb_shift(struct sk_buff *to, struct sk_buff *from, int pcount,
513 : int shiftlen);
514 :
515 : void tcp_sock_set_cork(struct sock *sk, bool on);
516 : int tcp_sock_set_keepcnt(struct sock *sk, int val);
517 : int tcp_sock_set_keepidle_locked(struct sock *sk, int val);
518 : int tcp_sock_set_keepidle(struct sock *sk, int val);
519 : int tcp_sock_set_keepintvl(struct sock *sk, int val);
520 : void tcp_sock_set_nodelay(struct sock *sk);
521 : void tcp_sock_set_quickack(struct sock *sk, int val);
522 : int tcp_sock_set_syncnt(struct sock *sk, int val);
523 : void tcp_sock_set_user_timeout(struct sock *sk, u32 val);
524 :
525 : #endif /* _LINUX_TCP_H */
|
