2 * llc_c_ac.c - actions performed during connection state transition.
5 * Functions in this module are implementation of connection component actions
6 * Details of actions can be found in IEEE-802.2 standard document.
7 * All functions have one connection and one event as input argument. All of
8 * them return 0 On success and 1 otherwise.
10 * Copyright (c) 1997 by Procom Technology, Inc.
11 * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
13 * This program can be redistributed or modified under the terms of the
14 * GNU General Public License as published by the Free Software Foundation.
15 * This program is distributed without any warranty or implied warranty
16 * of merchantability or fitness for a particular purpose.
18 * See the GNU General Public License for more details.
20 #include <linux/netdevice.h>
21 #include <net/llc_conn.h>
22 #include <net/llc_sap.h>
24 #include <net/llc_c_ev.h>
25 #include <net/llc_c_ac.h>
26 #include <net/llc_c_st.h>
27 #include <net/llc_pdu.h>
31 static int llc_conn_ac_inc_vs_by_1(struct sock
*sk
, struct sk_buff
*skb
);
32 static void llc_process_tmr_ev(struct sock
*sk
, struct sk_buff
*skb
);
33 static int llc_conn_ac_data_confirm(struct sock
*sk
, struct sk_buff
*ev
);
35 static int llc_conn_ac_inc_npta_value(struct sock
*sk
, struct sk_buff
*skb
);
37 static int llc_conn_ac_send_rr_rsp_f_set_ackpf(struct sock
*sk
,
40 static int llc_conn_ac_set_p_flag_1(struct sock
*sk
, struct sk_buff
*skb
);
44 int llc_conn_ac_clear_remote_busy(struct sock
*sk
, struct sk_buff
*skb
)
46 struct llc_sock
*llc
= llc_sk(sk
);
48 if (llc
->remote_busy_flag
) {
50 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
52 llc
->remote_busy_flag
= 0;
53 del_timer(&llc
->busy_state_timer
.timer
);
54 nr
= LLC_I_GET_NR(pdu
);
55 llc_conn_resend_i_pdu_as_cmd(sk
, nr
, 0);
60 int llc_conn_ac_conn_ind(struct sock
*sk
, struct sk_buff
*skb
)
62 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
64 ev
->ind_prim
= LLC_CONN_PRIM
;
68 int llc_conn_ac_conn_confirm(struct sock
*sk
, struct sk_buff
*skb
)
70 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
72 ev
->cfm_prim
= LLC_CONN_PRIM
;
76 static int llc_conn_ac_data_confirm(struct sock
*sk
, struct sk_buff
*skb
)
78 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
80 ev
->cfm_prim
= LLC_DATA_PRIM
;
84 int llc_conn_ac_data_ind(struct sock
*sk
, struct sk_buff
*skb
)
86 llc_conn_rtn_pdu(sk
, skb
);
90 int llc_conn_ac_disc_ind(struct sock
*sk
, struct sk_buff
*skb
)
92 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
96 if (ev
->type
== LLC_CONN_EV_TYPE_PDU
) {
97 struct llc_pdu_un
*pdu
= llc_pdu_un_hdr(skb
);
99 if (LLC_PDU_IS_RSP(pdu
) &&
100 LLC_PDU_TYPE_IS_U(pdu
) &&
101 LLC_U_PDU_RSP(pdu
) == LLC_2_PDU_RSP_DM
)
102 reason
= LLC_DISC_REASON_RX_DM_RSP_PDU
;
103 else if (LLC_PDU_IS_CMD(pdu
) &&
104 LLC_PDU_TYPE_IS_U(pdu
) &&
105 LLC_U_PDU_CMD(pdu
) == LLC_2_PDU_CMD_DISC
)
106 reason
= LLC_DISC_REASON_RX_DISC_CMD_PDU
;
107 } else if (ev
->type
== LLC_CONN_EV_TYPE_ACK_TMR
)
108 reason
= LLC_DISC_REASON_ACK_TMR_EXP
;
113 ev
->ind_prim
= LLC_DISC_PRIM
;
118 int llc_conn_ac_disc_confirm(struct sock
*sk
, struct sk_buff
*skb
)
120 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
122 ev
->reason
= ev
->status
;
123 ev
->cfm_prim
= LLC_DISC_PRIM
;
127 int llc_conn_ac_rst_ind(struct sock
*sk
, struct sk_buff
*skb
)
131 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
132 struct llc_pdu_un
*pdu
= llc_pdu_un_hdr(skb
);
133 struct llc_sock
*llc
= llc_sk(sk
);
136 case LLC_CONN_EV_TYPE_PDU
:
137 if (LLC_PDU_IS_RSP(pdu
) &&
138 LLC_PDU_TYPE_IS_U(pdu
) &&
139 LLC_U_PDU_RSP(pdu
) == LLC_2_PDU_RSP_FRMR
) {
140 reason
= LLC_RESET_REASON_LOCAL
;
142 } else if (LLC_PDU_IS_CMD(pdu
) &&
143 LLC_PDU_TYPE_IS_U(pdu
) &&
144 LLC_U_PDU_CMD(pdu
) == LLC_2_PDU_CMD_SABME
) {
145 reason
= LLC_RESET_REASON_REMOTE
;
149 case LLC_CONN_EV_TYPE_ACK_TMR
:
150 case LLC_CONN_EV_TYPE_P_TMR
:
151 case LLC_CONN_EV_TYPE_REJ_TMR
:
152 case LLC_CONN_EV_TYPE_BUSY_TMR
:
153 if (llc
->retry_count
> llc
->n2
) {
154 reason
= LLC_RESET_REASON_LOCAL
;
161 ev
->ind_prim
= LLC_RESET_PRIM
;
166 int llc_conn_ac_rst_confirm(struct sock
*sk
, struct sk_buff
*skb
)
168 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
171 ev
->cfm_prim
= LLC_RESET_PRIM
;
175 int llc_conn_ac_clear_remote_busy_if_f_eq_1(struct sock
*sk
,
178 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
180 if (LLC_PDU_IS_RSP(pdu
) &&
181 LLC_PDU_TYPE_IS_I(pdu
) &&
182 LLC_I_PF_IS_1(pdu
) && llc_sk(sk
)->ack_pf
)
183 llc_conn_ac_clear_remote_busy(sk
, skb
);
187 int llc_conn_ac_stop_rej_tmr_if_data_flag_eq_2(struct sock
*sk
,
190 struct llc_sock
*llc
= llc_sk(sk
);
192 if (llc
->data_flag
== 2)
193 del_timer(&llc
->rej_sent_timer
.timer
);
197 int llc_conn_ac_send_disc_cmd_p_set_x(struct sock
*sk
, struct sk_buff
*skb
)
200 struct llc_sock
*llc
= llc_sk(sk
);
201 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
204 struct llc_sap
*sap
= llc
->sap
;
206 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
207 llc
->daddr
.lsap
, LLC_PDU_CMD
);
208 llc_pdu_init_as_disc_cmd(nskb
, 1);
209 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
212 llc_conn_send_pdu(sk
, nskb
);
213 llc_conn_ac_set_p_flag_1(sk
, skb
);
222 int llc_conn_ac_send_dm_rsp_f_set_p(struct sock
*sk
, struct sk_buff
*skb
)
225 struct llc_sock
*llc
= llc_sk(sk
);
226 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
229 struct llc_sap
*sap
= llc
->sap
;
232 llc_pdu_decode_pf_bit(skb
, &f_bit
);
233 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
234 llc
->daddr
.lsap
, LLC_PDU_RSP
);
235 llc_pdu_init_as_dm_rsp(nskb
, f_bit
);
236 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
239 llc_conn_send_pdu(sk
, nskb
);
248 int llc_conn_ac_send_dm_rsp_f_set_1(struct sock
*sk
, struct sk_buff
*skb
)
251 struct llc_sock
*llc
= llc_sk(sk
);
252 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
255 struct llc_sap
*sap
= llc
->sap
;
257 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
258 llc
->daddr
.lsap
, LLC_PDU_RSP
);
259 llc_pdu_init_as_dm_rsp(nskb
, 1);
260 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
263 llc_conn_send_pdu(sk
, nskb
);
272 int llc_conn_ac_send_frmr_rsp_f_set_x(struct sock
*sk
, struct sk_buff
*skb
)
276 struct sk_buff
*nskb
;
277 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
278 struct llc_sock
*llc
= llc_sk(sk
);
280 llc
->rx_pdu_hdr
= *((u32
*)pdu
);
281 if (LLC_PDU_IS_CMD(pdu
))
282 llc_pdu_decode_pf_bit(skb
, &f_bit
);
285 nskb
= llc_alloc_frame(sk
, llc
->dev
);
287 struct llc_sap
*sap
= llc
->sap
;
289 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
290 llc
->daddr
.lsap
, LLC_PDU_RSP
);
291 llc_pdu_init_as_frmr_rsp(nskb
, pdu
, f_bit
, llc
->vS
,
293 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
296 llc_conn_send_pdu(sk
, nskb
);
305 int llc_conn_ac_resend_frmr_rsp_f_set_0(struct sock
*sk
, struct sk_buff
*skb
)
308 struct llc_sock
*llc
= llc_sk(sk
);
309 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
312 struct llc_sap
*sap
= llc
->sap
;
313 struct llc_pdu_sn
*pdu
= (struct llc_pdu_sn
*)&llc
->rx_pdu_hdr
;
315 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
316 llc
->daddr
.lsap
, LLC_PDU_RSP
);
317 llc_pdu_init_as_frmr_rsp(nskb
, pdu
, 0, llc
->vS
,
319 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
322 llc_conn_send_pdu(sk
, nskb
);
331 int llc_conn_ac_resend_frmr_rsp_f_set_p(struct sock
*sk
, struct sk_buff
*skb
)
335 struct sk_buff
*nskb
;
336 struct llc_sock
*llc
= llc_sk(sk
);
338 llc_pdu_decode_pf_bit(skb
, &f_bit
);
339 nskb
= llc_alloc_frame(sk
, llc
->dev
);
341 struct llc_sap
*sap
= llc
->sap
;
342 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
344 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
345 llc
->daddr
.lsap
, LLC_PDU_RSP
);
346 llc_pdu_init_as_frmr_rsp(nskb
, pdu
, f_bit
, llc
->vS
,
348 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
351 llc_conn_send_pdu(sk
, nskb
);
360 int llc_conn_ac_send_i_cmd_p_set_1(struct sock
*sk
, struct sk_buff
*skb
)
363 struct llc_sock
*llc
= llc_sk(sk
);
364 struct llc_sap
*sap
= llc
->sap
;
366 llc_pdu_header_init(skb
, LLC_PDU_TYPE_I
, sap
->laddr
.lsap
,
367 llc
->daddr
.lsap
, LLC_PDU_CMD
);
368 llc_pdu_init_as_i_cmd(skb
, 1, llc
->vS
, llc
->vR
);
369 rc
= llc_mac_hdr_init(skb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
371 llc_conn_send_pdu(sk
, skb
);
372 llc_conn_ac_inc_vs_by_1(sk
, skb
);
377 static int llc_conn_ac_send_i_cmd_p_set_0(struct sock
*sk
, struct sk_buff
*skb
)
380 struct llc_sock
*llc
= llc_sk(sk
);
381 struct llc_sap
*sap
= llc
->sap
;
383 llc_pdu_header_init(skb
, LLC_PDU_TYPE_I
, sap
->laddr
.lsap
,
384 llc
->daddr
.lsap
, LLC_PDU_CMD
);
385 llc_pdu_init_as_i_cmd(skb
, 0, llc
->vS
, llc
->vR
);
386 rc
= llc_mac_hdr_init(skb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
388 llc_conn_send_pdu(sk
, skb
);
389 llc_conn_ac_inc_vs_by_1(sk
, skb
);
394 int llc_conn_ac_send_i_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
397 struct llc_sock
*llc
= llc_sk(sk
);
398 struct llc_sap
*sap
= llc
->sap
;
400 llc_pdu_header_init(skb
, LLC_PDU_TYPE_I
, sap
->laddr
.lsap
,
401 llc
->daddr
.lsap
, LLC_PDU_CMD
);
402 llc_pdu_init_as_i_cmd(skb
, 0, llc
->vS
, llc
->vR
);
403 rc
= llc_mac_hdr_init(skb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
405 llc_conn_send_pdu(sk
, skb
);
406 llc_conn_ac_inc_vs_by_1(sk
, skb
);
411 int llc_conn_ac_resend_i_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
413 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
414 u8 nr
= LLC_I_GET_NR(pdu
);
416 llc_conn_resend_i_pdu_as_cmd(sk
, nr
, 0);
420 int llc_conn_ac_resend_i_xxx_x_set_0_or_send_rr(struct sock
*sk
,
424 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
426 struct llc_sock
*llc
= llc_sk(sk
);
427 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
430 struct llc_sap
*sap
= llc
->sap
;
432 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
433 llc
->daddr
.lsap
, LLC_PDU_RSP
);
434 llc_pdu_init_as_rr_rsp(nskb
, 0, llc
->vR
);
435 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
437 llc_conn_send_pdu(sk
, nskb
);
442 nr
= LLC_I_GET_NR(pdu
);
444 llc_conn_resend_i_pdu_as_cmd(sk
, nr
, 0);
449 int llc_conn_ac_resend_i_rsp_f_set_1(struct sock
*sk
, struct sk_buff
*skb
)
451 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
452 u8 nr
= LLC_I_GET_NR(pdu
);
454 llc_conn_resend_i_pdu_as_rsp(sk
, nr
, 1);
458 int llc_conn_ac_send_rej_cmd_p_set_1(struct sock
*sk
, struct sk_buff
*skb
)
461 struct llc_sock
*llc
= llc_sk(sk
);
462 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
465 struct llc_sap
*sap
= llc
->sap
;
467 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
468 llc
->daddr
.lsap
, LLC_PDU_CMD
);
469 llc_pdu_init_as_rej_cmd(nskb
, 1, llc
->vR
);
470 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
473 llc_conn_send_pdu(sk
, nskb
);
482 int llc_conn_ac_send_rej_rsp_f_set_1(struct sock
*sk
, struct sk_buff
*skb
)
485 struct llc_sock
*llc
= llc_sk(sk
);
486 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
489 struct llc_sap
*sap
= llc
->sap
;
491 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
492 llc
->daddr
.lsap
, LLC_PDU_RSP
);
493 llc_pdu_init_as_rej_rsp(nskb
, 1, llc
->vR
);
494 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
497 llc_conn_send_pdu(sk
, nskb
);
506 int llc_conn_ac_send_rej_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
509 struct llc_sock
*llc
= llc_sk(sk
);
510 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
513 struct llc_sap
*sap
= llc
->sap
;
515 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
516 llc
->daddr
.lsap
, LLC_PDU_RSP
);
517 llc_pdu_init_as_rej_rsp(nskb
, 0, llc
->vR
);
518 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
521 llc_conn_send_pdu(sk
, nskb
);
530 int llc_conn_ac_send_rnr_cmd_p_set_1(struct sock
*sk
, struct sk_buff
*skb
)
533 struct llc_sock
*llc
= llc_sk(sk
);
534 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
537 struct llc_sap
*sap
= llc
->sap
;
539 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
540 llc
->daddr
.lsap
, LLC_PDU_CMD
);
541 llc_pdu_init_as_rnr_cmd(nskb
, 1, llc
->vR
);
542 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
545 llc_conn_send_pdu(sk
, nskb
);
554 int llc_conn_ac_send_rnr_rsp_f_set_1(struct sock
*sk
, struct sk_buff
*skb
)
557 struct llc_sock
*llc
= llc_sk(sk
);
558 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
561 struct llc_sap
*sap
= llc
->sap
;
563 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
564 llc
->daddr
.lsap
, LLC_PDU_RSP
);
565 llc_pdu_init_as_rnr_rsp(nskb
, 1, llc
->vR
);
566 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
569 llc_conn_send_pdu(sk
, nskb
);
578 int llc_conn_ac_send_rnr_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
581 struct llc_sock
*llc
= llc_sk(sk
);
582 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
585 struct llc_sap
*sap
= llc
->sap
;
587 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
588 llc
->daddr
.lsap
, LLC_PDU_RSP
);
589 llc_pdu_init_as_rnr_rsp(nskb
, 0, llc
->vR
);
590 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
593 llc_conn_send_pdu(sk
, nskb
);
602 int llc_conn_ac_set_remote_busy(struct sock
*sk
, struct sk_buff
*skb
)
604 struct llc_sock
*llc
= llc_sk(sk
);
606 if (!llc
->remote_busy_flag
) {
607 llc
->remote_busy_flag
= 1;
608 mod_timer(&llc
->busy_state_timer
.timer
,
609 jiffies
+ llc
->busy_state_timer
.expire
);
614 int llc_conn_ac_opt_send_rnr_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
617 struct llc_sock
*llc
= llc_sk(sk
);
618 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
621 struct llc_sap
*sap
= llc
->sap
;
623 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
624 llc
->daddr
.lsap
, LLC_PDU_RSP
);
625 llc_pdu_init_as_rnr_rsp(nskb
, 0, llc
->vR
);
626 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
629 llc_conn_send_pdu(sk
, nskb
);
638 int llc_conn_ac_send_rr_cmd_p_set_1(struct sock
*sk
, struct sk_buff
*skb
)
641 struct llc_sock
*llc
= llc_sk(sk
);
642 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
645 struct llc_sap
*sap
= llc
->sap
;
647 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
648 llc
->daddr
.lsap
, LLC_PDU_CMD
);
649 llc_pdu_init_as_rr_cmd(nskb
, 1, llc
->vR
);
650 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
653 llc_conn_send_pdu(sk
, nskb
);
662 int llc_conn_ac_send_rr_rsp_f_set_1(struct sock
*sk
, struct sk_buff
*skb
)
665 struct llc_sock
*llc
= llc_sk(sk
);
666 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
669 struct llc_sap
*sap
= llc
->sap
;
672 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
673 llc
->daddr
.lsap
, LLC_PDU_RSP
);
674 llc_pdu_init_as_rr_rsp(nskb
, f_bit
, llc
->vR
);
675 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
678 llc_conn_send_pdu(sk
, nskb
);
687 int llc_conn_ac_send_ack_rsp_f_set_1(struct sock
*sk
, struct sk_buff
*skb
)
690 struct llc_sock
*llc
= llc_sk(sk
);
691 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
694 struct llc_sap
*sap
= llc
->sap
;
696 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
697 llc
->daddr
.lsap
, LLC_PDU_RSP
);
698 llc_pdu_init_as_rr_rsp(nskb
, 1, llc
->vR
);
699 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
702 llc_conn_send_pdu(sk
, nskb
);
711 int llc_conn_ac_send_rr_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
714 struct llc_sock
*llc
= llc_sk(sk
);
715 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
718 struct llc_sap
*sap
= llc
->sap
;
720 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
721 llc
->daddr
.lsap
, LLC_PDU_RSP
);
722 llc_pdu_init_as_rr_rsp(nskb
, 0, llc
->vR
);
723 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
726 llc_conn_send_pdu(sk
, nskb
);
735 int llc_conn_ac_send_ack_xxx_x_set_0(struct sock
*sk
, struct sk_buff
*skb
)
738 struct llc_sock
*llc
= llc_sk(sk
);
739 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
742 struct llc_sap
*sap
= llc
->sap
;
744 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
745 llc
->daddr
.lsap
, LLC_PDU_RSP
);
746 llc_pdu_init_as_rr_rsp(nskb
, 0, llc
->vR
);
747 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
750 llc_conn_send_pdu(sk
, nskb
);
759 void llc_conn_set_p_flag(struct sock
*sk
, u8 value
)
761 int state_changed
= llc_sk(sk
)->p_flag
&& !value
;
763 llc_sk(sk
)->p_flag
= value
;
766 sk
->sk_state_change(sk
);
769 int llc_conn_ac_send_sabme_cmd_p_set_x(struct sock
*sk
, struct sk_buff
*skb
)
772 struct llc_sock
*llc
= llc_sk(sk
);
773 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
776 struct llc_sap
*sap
= llc
->sap
;
777 u8
*dmac
= llc
->daddr
.mac
;
779 if (llc
->dev
->flags
& IFF_LOOPBACK
)
780 dmac
= llc
->dev
->dev_addr
;
781 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
782 llc
->daddr
.lsap
, LLC_PDU_CMD
);
783 llc_pdu_init_as_sabme_cmd(nskb
, 1);
784 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, dmac
);
787 llc_conn_send_pdu(sk
, nskb
);
788 llc_conn_set_p_flag(sk
, 1);
797 int llc_conn_ac_send_ua_rsp_f_set_p(struct sock
*sk
, struct sk_buff
*skb
)
801 struct llc_sock
*llc
= llc_sk(sk
);
802 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
804 llc_pdu_decode_pf_bit(skb
, &f_bit
);
806 struct llc_sap
*sap
= llc
->sap
;
808 nskb
->dev
= llc
->dev
;
809 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_U
, sap
->laddr
.lsap
,
810 llc
->daddr
.lsap
, LLC_PDU_RSP
);
811 llc_pdu_init_as_ua_rsp(nskb
, f_bit
);
812 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
815 llc_conn_send_pdu(sk
, nskb
);
824 int llc_conn_ac_set_s_flag_0(struct sock
*sk
, struct sk_buff
*skb
)
826 llc_sk(sk
)->s_flag
= 0;
830 int llc_conn_ac_set_s_flag_1(struct sock
*sk
, struct sk_buff
*skb
)
832 llc_sk(sk
)->s_flag
= 1;
836 int llc_conn_ac_start_p_timer(struct sock
*sk
, struct sk_buff
*skb
)
838 struct llc_sock
*llc
= llc_sk(sk
);
840 llc_conn_set_p_flag(sk
, 1);
841 mod_timer(&llc
->pf_cycle_timer
.timer
,
842 jiffies
+ llc
->pf_cycle_timer
.expire
);
847 * llc_conn_ac_send_ack_if_needed - check if ack is needed
848 * @sk: current connection structure
849 * @skb: current event
851 * Checks number of received PDUs which have not been acknowledged, yet,
852 * If number of them reaches to "npta"(Number of PDUs To Acknowledge) then
853 * sends an RR response as acknowledgement for them. Returns 0 for
854 * success, 1 otherwise.
856 int llc_conn_ac_send_ack_if_needed(struct sock
*sk
, struct sk_buff
*skb
)
859 struct llc_sock
*llc
= llc_sk(sk
);
861 llc_pdu_decode_pf_bit(skb
, &pf_bit
);
862 llc
->ack_pf
|= pf_bit
& 1;
863 if (!llc
->ack_must_be_send
) {
864 llc
->first_pdu_Ns
= llc
->vR
;
865 llc
->ack_must_be_send
= 1;
866 llc
->ack_pf
= pf_bit
& 1;
868 if (((llc
->vR
- llc
->first_pdu_Ns
+ 1 + LLC_2_SEQ_NBR_MODULO
)
869 % LLC_2_SEQ_NBR_MODULO
) >= llc
->npta
) {
870 llc_conn_ac_send_rr_rsp_f_set_ackpf(sk
, skb
);
871 llc
->ack_must_be_send
= 0;
873 llc_conn_ac_inc_npta_value(sk
, skb
);
879 * llc_conn_ac_rst_sendack_flag - resets ack_must_be_send flag
880 * @sk: current connection structure
881 * @skb: current event
883 * This action resets ack_must_be_send flag of given connection, this flag
884 * indicates if there is any PDU which has not been acknowledged yet.
885 * Returns 0 for success, 1 otherwise.
887 int llc_conn_ac_rst_sendack_flag(struct sock
*sk
, struct sk_buff
*skb
)
889 llc_sk(sk
)->ack_must_be_send
= llc_sk(sk
)->ack_pf
= 0;
894 * llc_conn_ac_send_i_rsp_f_set_ackpf - acknowledge received PDUs
895 * @sk: current connection structure
896 * @skb: current event
898 * Sends an I response PDU with f-bit set to ack_pf flag as acknowledge to
899 * all received PDUs which have not been acknowledged, yet. ack_pf flag is
900 * set to one if one PDU with p-bit set to one is received. Returns 0 for
901 * success, 1 otherwise.
903 static int llc_conn_ac_send_i_rsp_f_set_ackpf(struct sock
*sk
,
907 struct llc_sock
*llc
= llc_sk(sk
);
908 struct llc_sap
*sap
= llc
->sap
;
910 llc_pdu_header_init(skb
, LLC_PDU_TYPE_I
, sap
->laddr
.lsap
,
911 llc
->daddr
.lsap
, LLC_PDU_RSP
);
912 llc_pdu_init_as_i_cmd(skb
, llc
->ack_pf
, llc
->vS
, llc
->vR
);
913 rc
= llc_mac_hdr_init(skb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
915 llc_conn_send_pdu(sk
, skb
);
916 llc_conn_ac_inc_vs_by_1(sk
, skb
);
922 * llc_conn_ac_send_i_as_ack - sends an I-format PDU to acknowledge rx PDUs
923 * @sk: current connection structure.
924 * @skb: current event.
926 * This action sends an I-format PDU as acknowledge to received PDUs which
927 * have not been acknowledged, yet, if there is any. By using of this
928 * action number of acknowledgements decreases, this technic is called
929 * piggy backing. Returns 0 for success, 1 otherwise.
931 int llc_conn_ac_send_i_as_ack(struct sock
*sk
, struct sk_buff
*skb
)
933 struct llc_sock
*llc
= llc_sk(sk
);
935 if (llc
->ack_must_be_send
) {
936 llc_conn_ac_send_i_rsp_f_set_ackpf(sk
, skb
);
937 llc
->ack_must_be_send
= 0 ;
940 llc_conn_ac_send_i_cmd_p_set_0(sk
, skb
);
945 * llc_conn_ac_send_rr_rsp_f_set_ackpf - ack all rx PDUs not yet acked
946 * @sk: current connection structure.
947 * @skb: current event.
949 * This action sends an RR response with f-bit set to ack_pf flag as
950 * acknowledge to all received PDUs which have not been acknowledged, yet,
951 * if there is any. ack_pf flag indicates if a PDU has been received with
952 * p-bit set to one. Returns 0 for success, 1 otherwise.
954 static int llc_conn_ac_send_rr_rsp_f_set_ackpf(struct sock
*sk
,
958 struct llc_sock
*llc
= llc_sk(sk
);
959 struct sk_buff
*nskb
= llc_alloc_frame(sk
, llc
->dev
);
962 struct llc_sap
*sap
= llc
->sap
;
964 llc_pdu_header_init(nskb
, LLC_PDU_TYPE_S
, sap
->laddr
.lsap
,
965 llc
->daddr
.lsap
, LLC_PDU_RSP
);
966 llc_pdu_init_as_rr_rsp(nskb
, llc
->ack_pf
, llc
->vR
);
967 rc
= llc_mac_hdr_init(nskb
, llc
->dev
->dev_addr
, llc
->daddr
.mac
);
970 llc_conn_send_pdu(sk
, nskb
);
980 * llc_conn_ac_inc_npta_value - tries to make value of npta greater
981 * @sk: current connection structure.
982 * @skb: current event.
984 * After "inc_cntr" times calling of this action, "npta" increase by one.
985 * this action tries to make vale of "npta" greater as possible; number of
986 * acknowledgements decreases by increasing of "npta". Returns 0 for
987 * success, 1 otherwise.
989 static int llc_conn_ac_inc_npta_value(struct sock
*sk
, struct sk_buff
*skb
)
991 struct llc_sock
*llc
= llc_sk(sk
);
993 if (!llc
->inc_cntr
) {
995 llc
->dec_cntr
= llc
->inc_cntr
= 2;
997 if (llc
->npta
> (u8
) ~LLC_2_SEQ_NBR_MODULO
)
998 llc
->npta
= (u8
) ~LLC_2_SEQ_NBR_MODULO
;
1005 * llc_conn_ac_adjust_npta_by_rr - decreases "npta" by one
1006 * @sk: current connection structure.
1007 * @skb: current event.
1009 * After receiving "dec_cntr" times RR command, this action decreases
1010 * "npta" by one. Returns 0 for success, 1 otherwise.
1012 int llc_conn_ac_adjust_npta_by_rr(struct sock
*sk
, struct sk_buff
*skb
)
1014 struct llc_sock
*llc
= llc_sk(sk
);
1016 if (!llc
->connect_step
&& !llc
->remote_busy_flag
) {
1017 if (!llc
->dec_step
) {
1018 if (!llc
->dec_cntr
) {
1019 llc
->inc_cntr
= llc
->dec_cntr
= 2;
1021 llc
->npta
= llc
->npta
- 1;
1026 llc
->connect_step
= 0 ;
1031 * llc_conn_ac_adjust_npta_by_rnr - decreases "npta" by one
1032 * @sk: current connection structure.
1033 * @skb: current event.
1035 * After receiving "dec_cntr" times RNR command, this action decreases
1036 * "npta" by one. Returns 0 for success, 1 otherwise.
1038 int llc_conn_ac_adjust_npta_by_rnr(struct sock
*sk
, struct sk_buff
*skb
)
1040 struct llc_sock
*llc
= llc_sk(sk
);
1042 if (llc
->remote_busy_flag
)
1043 if (!llc
->dec_step
) {
1044 if (!llc
->dec_cntr
) {
1045 llc
->inc_cntr
= llc
->dec_cntr
= 2;
1055 * llc_conn_ac_dec_tx_win_size - decreases tx window size
1056 * @sk: current connection structure.
1057 * @skb: current event.
1059 * After receiving of a REJ command or response, transmit window size is
1060 * decreased by number of PDUs which are outstanding yet. Returns 0 for
1061 * success, 1 otherwise.
1063 int llc_conn_ac_dec_tx_win_size(struct sock
*sk
, struct sk_buff
*skb
)
1065 struct llc_sock
*llc
= llc_sk(sk
);
1066 u8 unacked_pdu
= skb_queue_len(&llc
->pdu_unack_q
);
1068 if (llc
->k
- unacked_pdu
< 1)
1071 llc
->k
-= unacked_pdu
;
1076 * llc_conn_ac_inc_tx_win_size - tx window size is inc by 1
1077 * @sk: current connection structure.
1078 * @skb: current event.
1080 * After receiving an RR response with f-bit set to one, transmit window
1081 * size is increased by one. Returns 0 for success, 1 otherwise.
1083 int llc_conn_ac_inc_tx_win_size(struct sock
*sk
, struct sk_buff
*skb
)
1085 struct llc_sock
*llc
= llc_sk(sk
);
1088 if (llc
->k
> (u8
) ~LLC_2_SEQ_NBR_MODULO
)
1089 llc
->k
= (u8
) ~LLC_2_SEQ_NBR_MODULO
;
1093 int llc_conn_ac_stop_all_timers(struct sock
*sk
, struct sk_buff
*skb
)
1095 struct llc_sock
*llc
= llc_sk(sk
);
1097 del_timer(&llc
->pf_cycle_timer
.timer
);
1098 del_timer(&llc
->ack_timer
.timer
);
1099 del_timer(&llc
->rej_sent_timer
.timer
);
1100 del_timer(&llc
->busy_state_timer
.timer
);
1101 llc
->ack_must_be_send
= 0;
1106 int llc_conn_ac_stop_other_timers(struct sock
*sk
, struct sk_buff
*skb
)
1108 struct llc_sock
*llc
= llc_sk(sk
);
1110 del_timer(&llc
->rej_sent_timer
.timer
);
1111 del_timer(&llc
->pf_cycle_timer
.timer
);
1112 del_timer(&llc
->busy_state_timer
.timer
);
1113 llc
->ack_must_be_send
= 0;
1118 int llc_conn_ac_start_ack_timer(struct sock
*sk
, struct sk_buff
*skb
)
1120 struct llc_sock
*llc
= llc_sk(sk
);
1122 mod_timer(&llc
->ack_timer
.timer
, jiffies
+ llc
->ack_timer
.expire
);
1126 int llc_conn_ac_start_rej_timer(struct sock
*sk
, struct sk_buff
*skb
)
1128 struct llc_sock
*llc
= llc_sk(sk
);
1130 mod_timer(&llc
->rej_sent_timer
.timer
,
1131 jiffies
+ llc
->rej_sent_timer
.expire
);
1135 int llc_conn_ac_start_ack_tmr_if_not_running(struct sock
*sk
,
1136 struct sk_buff
*skb
)
1138 struct llc_sock
*llc
= llc_sk(sk
);
1140 if (!timer_pending(&llc
->ack_timer
.timer
))
1141 mod_timer(&llc
->ack_timer
.timer
,
1142 jiffies
+ llc
->ack_timer
.expire
);
1146 int llc_conn_ac_stop_ack_timer(struct sock
*sk
, struct sk_buff
*skb
)
1148 del_timer(&llc_sk(sk
)->ack_timer
.timer
);
1152 int llc_conn_ac_stop_p_timer(struct sock
*sk
, struct sk_buff
*skb
)
1154 struct llc_sock
*llc
= llc_sk(sk
);
1156 del_timer(&llc
->pf_cycle_timer
.timer
);
1157 llc_conn_set_p_flag(sk
, 0);
1161 int llc_conn_ac_stop_rej_timer(struct sock
*sk
, struct sk_buff
*skb
)
1163 del_timer(&llc_sk(sk
)->rej_sent_timer
.timer
);
1167 int llc_conn_ac_upd_nr_received(struct sock
*sk
, struct sk_buff
*skb
)
1171 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
1172 struct llc_sock
*llc
= llc_sk(sk
);
1174 llc
->last_nr
= PDU_SUPV_GET_Nr(pdu
);
1175 acked
= llc_conn_remove_acked_pdus(sk
, llc
->last_nr
, &unacked
);
1176 /* On loopback we don't queue I frames in unack_pdu_q queue. */
1177 if (acked
> 0 || (llc
->dev
->flags
& IFF_LOOPBACK
)) {
1178 llc
->retry_count
= 0;
1179 del_timer(&llc
->ack_timer
.timer
);
1180 if (llc
->failed_data_req
) {
1181 /* already, we did not accept data from upper layer
1182 * (tx_window full or unacceptable state). Now, we
1183 * can send data and must inform to upper layer.
1185 llc
->failed_data_req
= 0;
1186 llc_conn_ac_data_confirm(sk
, skb
);
1189 mod_timer(&llc
->ack_timer
.timer
,
1190 jiffies
+ llc
->ack_timer
.expire
);
1191 } else if (llc
->failed_data_req
) {
1194 llc_pdu_decode_pf_bit(skb
, &f_bit
);
1196 llc
->failed_data_req
= 0;
1197 llc_conn_ac_data_confirm(sk
, skb
);
1203 int llc_conn_ac_upd_p_flag(struct sock
*sk
, struct sk_buff
*skb
)
1205 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
1207 if (LLC_PDU_IS_RSP(pdu
)) {
1210 llc_pdu_decode_pf_bit(skb
, &f_bit
);
1212 llc_conn_set_p_flag(sk
, 0);
1213 llc_conn_ac_stop_p_timer(sk
, skb
);
1219 int llc_conn_ac_set_data_flag_2(struct sock
*sk
, struct sk_buff
*skb
)
1221 llc_sk(sk
)->data_flag
= 2;
1225 int llc_conn_ac_set_data_flag_0(struct sock
*sk
, struct sk_buff
*skb
)
1227 llc_sk(sk
)->data_flag
= 0;
1231 int llc_conn_ac_set_data_flag_1(struct sock
*sk
, struct sk_buff
*skb
)
1233 llc_sk(sk
)->data_flag
= 1;
1237 int llc_conn_ac_set_data_flag_1_if_data_flag_eq_0(struct sock
*sk
,
1238 struct sk_buff
*skb
)
1240 if (!llc_sk(sk
)->data_flag
)
1241 llc_sk(sk
)->data_flag
= 1;
1245 int llc_conn_ac_set_p_flag_0(struct sock
*sk
, struct sk_buff
*skb
)
1247 llc_conn_set_p_flag(sk
, 0);
1251 static int llc_conn_ac_set_p_flag_1(struct sock
*sk
, struct sk_buff
*skb
)
1253 llc_conn_set_p_flag(sk
, 1);
1257 int llc_conn_ac_set_remote_busy_0(struct sock
*sk
, struct sk_buff
*skb
)
1259 llc_sk(sk
)->remote_busy_flag
= 0;
1263 int llc_conn_ac_set_cause_flag_0(struct sock
*sk
, struct sk_buff
*skb
)
1265 llc_sk(sk
)->cause_flag
= 0;
1269 int llc_conn_ac_set_cause_flag_1(struct sock
*sk
, struct sk_buff
*skb
)
1271 llc_sk(sk
)->cause_flag
= 1;
1275 int llc_conn_ac_set_retry_cnt_0(struct sock
*sk
, struct sk_buff
*skb
)
1277 llc_sk(sk
)->retry_count
= 0;
1281 int llc_conn_ac_inc_retry_cnt_by_1(struct sock
*sk
, struct sk_buff
*skb
)
1283 llc_sk(sk
)->retry_count
++;
1287 int llc_conn_ac_set_vr_0(struct sock
*sk
, struct sk_buff
*skb
)
1293 int llc_conn_ac_inc_vr_by_1(struct sock
*sk
, struct sk_buff
*skb
)
1295 llc_sk(sk
)->vR
= PDU_GET_NEXT_Vr(llc_sk(sk
)->vR
);
1299 int llc_conn_ac_set_vs_0(struct sock
*sk
, struct sk_buff
*skb
)
1305 int llc_conn_ac_set_vs_nr(struct sock
*sk
, struct sk_buff
*skb
)
1307 llc_sk(sk
)->vS
= llc_sk(sk
)->last_nr
;
1311 static int llc_conn_ac_inc_vs_by_1(struct sock
*sk
, struct sk_buff
*skb
)
1313 llc_sk(sk
)->vS
= (llc_sk(sk
)->vS
+ 1) % LLC_2_SEQ_NBR_MODULO
;
1317 static void llc_conn_tmr_common_cb(unsigned long timeout_data
, u8 type
)
1319 struct sock
*sk
= (struct sock
*)timeout_data
;
1320 struct sk_buff
*skb
= alloc_skb(0, GFP_ATOMIC
);
1324 struct llc_conn_state_ev
*ev
= llc_conn_ev(skb
);
1326 skb_set_owner_r(skb
, sk
);
1328 llc_process_tmr_ev(sk
, skb
);
1333 void llc_conn_pf_cycle_tmr_cb(unsigned long timeout_data
)
1335 llc_conn_tmr_common_cb(timeout_data
, LLC_CONN_EV_TYPE_P_TMR
);
1338 void llc_conn_busy_tmr_cb(unsigned long timeout_data
)
1340 llc_conn_tmr_common_cb(timeout_data
, LLC_CONN_EV_TYPE_BUSY_TMR
);
1343 void llc_conn_ack_tmr_cb(unsigned long timeout_data
)
1345 llc_conn_tmr_common_cb(timeout_data
, LLC_CONN_EV_TYPE_ACK_TMR
);
1348 void llc_conn_rej_tmr_cb(unsigned long timeout_data
)
1350 llc_conn_tmr_common_cb(timeout_data
, LLC_CONN_EV_TYPE_REJ_TMR
);
1353 int llc_conn_ac_rst_vs(struct sock
*sk
, struct sk_buff
*skb
)
1355 llc_sk(sk
)->X
= llc_sk(sk
)->vS
;
1356 llc_conn_ac_set_vs_nr(sk
, skb
);
1360 int llc_conn_ac_upd_vs(struct sock
*sk
, struct sk_buff
*skb
)
1362 struct llc_pdu_sn
*pdu
= llc_pdu_sn_hdr(skb
);
1363 u8 nr
= PDU_SUPV_GET_Nr(pdu
);
1365 if (llc_circular_between(llc_sk(sk
)->vS
, nr
, llc_sk(sk
)->X
))
1366 llc_conn_ac_set_vs_nr(sk
, skb
);
1371 * Non-standard actions; these not contained in IEEE specification; for
1375 * llc_conn_disc - removes connection from SAP list and frees it
1376 * @sk: closed connection
1377 * @skb: occurred event
1379 int llc_conn_disc(struct sock
*sk
, struct sk_buff
*skb
)
1381 /* FIXME: this thing seems to want to die */
1386 * llc_conn_reset - resets connection
1387 * @sk : reseting connection.
1388 * @skb: occurred event.
1390 * Stop all timers, empty all queues and reset all flags.
1392 int llc_conn_reset(struct sock
*sk
, struct sk_buff
*skb
)
1399 * llc_circular_between - designates that b is between a and c or not
1401 * @b: element to see if is between a and b
1404 * This function designates that b is between a and c or not (for example,
1405 * 0 is between 127 and 1). Returns 1 if b is between a and c, 0
1408 u8
llc_circular_between(u8 a
, u8 b
, u8 c
)
1416 * llc_process_tmr_ev - timer backend
1417 * @sk: active connection
1418 * @skb: occurred event
1420 * This function is called from timer callback functions. When connection
1421 * is busy (during sending a data frame) timer expiration event must be
1422 * queued. Otherwise this event can be sent to connection state machine.
1423 * Queued events will process by llc_backlog_rcv function after sending
1426 static void llc_process_tmr_ev(struct sock
*sk
, struct sk_buff
*skb
)
1428 if (llc_sk(sk
)->state
== LLC_CONN_OUT_OF_SVC
) {
1429 printk(KERN_WARNING
"%s: timer called on closed connection\n",
1433 if (!sock_owned_by_user(sk
))
1434 llc_conn_state_process(sk
, skb
);
1436 llc_set_backlog_type(skb
, LLC_EVENT
);
1437 sk_add_backlog(sk
, skb
);