File: /usr/src/linux/net/decnet/dn_nsp_out.c
1
2 /*
3 * DECnet An implementation of the DECnet protocol suite for the LINUX
4 * operating system. DECnet is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * DECnet Network Services Protocol (Output)
8 *
9 * Author: Eduardo Marcelo Serrat <emserrat@geocities.com>
10 *
11 * Changes:
12 *
13 * Steve Whitehouse: Split into dn_nsp_in.c and dn_nsp_out.c from
14 * original dn_nsp.c.
15 * Steve Whitehouse: Updated to work with my new routing architecture.
16 * Steve Whitehouse: Added changes from Eduardo Serrat's patches.
17 * Steve Whitehouse: Now conninits have the "return" bit set.
18 * Steve Whitehouse: Fixes to check alloc'd skbs are non NULL!
19 * Moved output state machine into one function
20 * Steve Whitehouse: New output state machine
21 * Paul Koning: Connect Confirm message fix.
22 * Eduardo Serrat: Fix to stop dn_nsp_do_disc() sending malformed packets.
23 * Steve Whitehouse: dn_nsp_output() and friends needed a spring clean
24 */
25
26 /******************************************************************************
27 (c) 1995-1998 E.M. Serrat emserrat@geocities.com
28
29 This program is free software; you can redistribute it and/or modify
30 it under the terms of the GNU General Public License as published by
31 the Free Software Foundation; either version 2 of the License, or
32 any later version.
33
34 This program is distributed in the hope that it will be useful,
35 but WITHOUT ANY WARRANTY; without even the implied warranty of
36 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 GNU General Public License for more details.
38 *******************************************************************************/
39
40 #include <linux/errno.h>
41 #include <linux/types.h>
42 #include <linux/socket.h>
43 #include <linux/in.h>
44 #include <linux/kernel.h>
45 #include <linux/sched.h>
46 #include <linux/timer.h>
47 #include <linux/string.h>
48 #include <linux/sockios.h>
49 #include <linux/net.h>
50 #include <linux/netdevice.h>
51 #include <linux/inet.h>
52 #include <linux/route.h>
53 #include <net/sock.h>
54 #include <asm/segment.h>
55 #include <asm/system.h>
56 #include <linux/fcntl.h>
57 #include <linux/mm.h>
58 #include <linux/termios.h>
59 #include <linux/interrupt.h>
60 #include <linux/proc_fs.h>
61 #include <linux/stat.h>
62 #include <linux/init.h>
63 #include <linux/poll.h>
64 #include <linux/if_packet.h>
65 #include <net/neighbour.h>
66 #include <net/dst.h>
67 #include <net/dn_nsp.h>
68 #include <net/dn_dev.h>
69 #include <net/dn_route.h>
70
71
72 static int nsp_backoff[NSP_MAXRXTSHIFT + 1] = { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 };
73
74 /*
75 * If sk == NULL, then we assume that we are supposed to be making
76 * a routing layer skb. If sk != NULL, then we are supposed to be
77 * creating an skb for the NSP layer.
78 *
79 * The eventual aim is for each socket to have a cached header size
80 * for its outgoing packets, and to set hdr from this when sk != NULL.
81 */
82 struct sk_buff *dn_alloc_skb(struct sock *sk, int size, int pri)
83 {
84 struct sk_buff *skb;
85 int hdr = 64;
86
87 if ((skb = alloc_skb(size + hdr, pri)) == NULL)
88 return NULL;
89
90 skb->protocol = __constant_htons(ETH_P_DNA_RT);
91 skb->pkt_type = PACKET_OUTGOING;
92
93 if (sk)
94 skb_set_owner_w(skb, sk);
95
96 skb_reserve(skb, hdr);
97
98 return skb;
99 }
100
101 /*
102 * Wrapper for the above, for allocs of data skbs. We try and get the
103 * whole size thats been asked for (plus 11 bytes of header). If this
104 * fails, then we try for any size over 16 bytes for SOCK_STREAMS.
105 */
106 struct sk_buff *dn_alloc_send_skb(struct sock *sk, int *size, int noblock, int *err)
107 {
108 int space;
109 int len;
110 struct sk_buff *skb = NULL;
111
112 *err = 0;
113
114 while(skb == NULL) {
115 if (signal_pending(current)) {
116 *err = ERESTARTSYS;
117 break;
118 }
119
120 if (sk->shutdown & SEND_SHUTDOWN) {
121 *err = EINVAL;
122 break;
123 }
124
125 if (sk->err)
126 break;
127
128 len = *size + 11;
129 space = sk->sndbuf - atomic_read(&sk->wmem_alloc);
130
131 if (space < len) {
132 if ((sk->socket->type == SOCK_STREAM) && (space >= (16 + 11)))
133 len = space;
134 }
135
136 if (space < len) {
137 set_bit(SOCK_ASYNC_NOSPACE, &sk->socket->flags);
138 if (noblock) {
139 *err = EWOULDBLOCK;
140 break;
141 }
142
143 clear_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
144 SOCK_SLEEP_PRE(sk)
145
146 if ((sk->sndbuf - atomic_read(&sk->wmem_alloc)) < len)
147 schedule();
148
149 SOCK_SLEEP_POST(sk)
150 continue;
151 }
152
153 if ((skb = dn_alloc_skb(sk, len, sk->allocation)) == NULL)
154 continue;
155
156 *size = len - 11;
157 }
158
159 return skb;
160 }
161
162 /*
163 * Calculate persist timer based upon the smoothed round
164 * trip time and the variance. Backoff according to the
165 * nsp_backoff[] array.
166 */
167 unsigned long dn_nsp_persist(struct sock *sk)
168 {
169 struct dn_scp *scp = DN_SK(sk);
170
171 unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
172
173 t *= nsp_backoff[scp->nsp_rxtshift];
174
175 if (t < HZ) t = HZ;
176 if (t > (600*HZ)) t = (600*HZ);
177
178 if (scp->nsp_rxtshift < NSP_MAXRXTSHIFT)
179 scp->nsp_rxtshift++;
180
181 /* printk(KERN_DEBUG "rxtshift %lu, t=%lu\n", scp->nsp_rxtshift, t); */
182
183 return t;
184 }
185
186 /*
187 * This is called each time we get an estimate for the rtt
188 * on the link.
189 */
190 static void dn_nsp_rtt(struct sock *sk, long rtt)
191 {
192 struct dn_scp *scp = DN_SK(sk);
193 long srtt = (long)scp->nsp_srtt;
194 long rttvar = (long)scp->nsp_rttvar;
195 long delta;
196
197 /*
198 * If the jiffies clock flips over in the middle of timestamp
199 * gathering this value might turn out negative, so we make sure
200 * that is it always positive here.
201 */
202 if (rtt < 0)
203 rtt = -rtt;
204 /*
205 * Add new rtt to smoothed average
206 */
207 delta = ((rtt << 3) - srtt);
208 srtt += (delta >> 3);
209 if (srtt >= 1)
210 scp->nsp_srtt = (unsigned long)srtt;
211 else
212 scp->nsp_srtt = 1;
213
214 /*
215 * Add new rtt varience to smoothed varience
216 */
217 delta >>= 1;
218 rttvar += ((((delta>0)?(delta):(-delta)) - rttvar) >> 2);
219 if (rttvar >= 1)
220 scp->nsp_rttvar = (unsigned long)rttvar;
221 else
222 scp->nsp_rttvar = 1;
223
224 /* printk(KERN_DEBUG "srtt=%lu rttvar=%lu\n", scp->nsp_srtt, scp->nsp_rttvar); */
225 }
226
227 /**
228 * dn_nsp_clone_and_send - Send a data packet by cloning it
229 * @skb: The packet to clone and transmit
230 * @gfp: memory allocation flag
231 *
232 * Clone a queued data or other data packet and transmit it.
233 *
234 * Returns: The number of times the packet has been sent previously
235 */
236 static inline unsigned dn_nsp_clone_and_send(struct sk_buff *skb, int gfp)
237 {
238 struct dn_skb_cb *cb = DN_SKB_CB(skb);
239 struct sk_buff *skb2;
240 int ret = 0;
241
242 if ((skb2 = skb_clone(skb, gfp)) != NULL) {
243 ret = cb->xmit_count;
244 cb->xmit_count++;
245 cb->stamp = jiffies;
246 skb2->sk = skb->sk;
247 dn_nsp_send(skb2);
248 }
249
250 return ret;
251 }
252
253 /**
254 * dn_nsp_output - Try and send something from socket queues
255 * @sk: The socket whose queues are to be investigated
256 * @gfp: The memory allocation flags
257 *
258 * Try and send the packet on the end of the data and other data queues.
259 * Other data gets priority over data, and if we retransmit a packet we
260 * reduce the window by dividing it in two.
261 *
262 */
263 void dn_nsp_output(struct sock *sk)
264 {
265 struct dn_scp *scp = DN_SK(sk);
266 struct sk_buff *skb;
267 unsigned reduce_win = 0;
268
269 /*
270 * First we check for otherdata/linkservice messages
271 */
272 if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL)
273 reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
274
275 /*
276 * If we may not send any data, we don't.
277 * If we are still trying to get some other data down the
278 * channel, we don't try and send any data.
279 */
280 if (reduce_win || (scp->flowrem_sw != DN_SEND))
281 goto recalc_window;
282
283 if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL)
284 reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
285
286 /*
287 * If we've sent any frame more than once, we cut the
288 * send window size in half. There is always a minimum
289 * window size of one available.
290 */
291 recalc_window:
292 if (reduce_win) {
293 scp->snd_window >>= 1;
294 if (scp->snd_window < NSP_MIN_WINDOW)
295 scp->snd_window = NSP_MIN_WINDOW;
296 }
297 }
298
299 int dn_nsp_xmit_timeout(struct sock *sk)
300 {
301 struct dn_scp *scp = DN_SK(sk);
302
303 dn_nsp_output(sk);
304
305 if (skb_queue_len(&scp->data_xmit_queue) || skb_queue_len(&scp->other_xmit_queue))
306 scp->persist = dn_nsp_persist(sk);
307
308 return 0;
309 }
310
311 static inline unsigned char *dn_mk_common_header(struct dn_scp *scp, struct sk_buff *skb, unsigned char msgflag, int len)
312 {
313 unsigned char *ptr = skb_push(skb, len);
314
315 if (len < 5)
316 BUG();
317
318 *ptr++ = msgflag;
319 *((unsigned short *)ptr) = scp->addrrem;
320 ptr += 2;
321 *((unsigned short *)ptr) = scp->addrloc;
322 ptr += 2;
323 return ptr;
324 }
325
326 static unsigned short *dn_mk_ack_header(struct sock *sk, struct sk_buff *skb, unsigned char msgflag, int hlen, int other)
327 {
328 struct dn_scp *scp = DN_SK(sk);
329 unsigned short acknum = scp->numdat_rcv & 0x0FFF;
330 unsigned short ackcrs = scp->numoth_rcv & 0x0FFF;
331 unsigned short *ptr;
332
333 if (hlen < 9)
334 BUG();
335
336 scp->ackxmt_dat = acknum;
337 scp->ackxmt_oth = ackcrs;
338 acknum |= 0x8000;
339 ackcrs |= 0x8000;
340
341 /* If this is an "other data/ack" message, swap acknum and ackcrs */
342 if (other) {
343 unsigned short tmp = acknum;
344 acknum = ackcrs;
345 ackcrs = tmp;
346 }
347
348 /* Set "cross subchannel" bit in ackcrs */
349 ackcrs |= 0x2000;
350
351 ptr = (unsigned short *)dn_mk_common_header(scp, skb, msgflag, hlen);
352
353 *ptr++ = dn_htons(acknum);
354 *ptr++ = dn_htons(ackcrs);
355
356 return ptr;
357 }
358
359 void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, int gfp, int oth)
360 {
361 struct dn_scp *scp = DN_SK(sk);
362 struct dn_skb_cb *cb = DN_SKB_CB(skb);
363 unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
364
365 /*
366 * Slow start: If we have been idle for more than
367 * one RTT, then reset window to min size.
368 */
369 if ((jiffies - scp->stamp) > t)
370 scp->snd_window = NSP_MIN_WINDOW;
371
372 /* printk(KERN_DEBUG "Window: %lu\n", scp->snd_window); */
373
374 cb->xmit_count = 0;
375
376 if (oth)
377 skb_queue_tail(&scp->other_xmit_queue, skb);
378 else
379 skb_queue_tail(&scp->data_xmit_queue, skb);
380
381 if (scp->flowrem_sw != DN_SEND)
382 return;
383
384 dn_nsp_clone_and_send(skb, gfp);
385 }
386
387
388 int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum)
389 {
390 struct dn_skb_cb *cb = DN_SKB_CB(skb);
391 struct dn_scp *scp = DN_SK(sk);
392 struct sk_buff *skb2, *list, *ack = NULL;
393 int wakeup = 0;
394 int try_retrans = 0;
395 unsigned long reftime = cb->stamp;
396 unsigned long pkttime;
397 unsigned short xmit_count;
398 unsigned short segnum;
399
400 skb2 = q->next;
401 list = (struct sk_buff *)q;
402 while(list != skb2) {
403 struct dn_skb_cb *cb2 = DN_SKB_CB(skb2);
404
405 if (before_or_equal(cb2->segnum, acknum))
406 ack = skb2;
407
408 /* printk(KERN_DEBUG "ack: %s %04x %04x\n", ack ? "ACK" : "SKIP", (int)cb2->segnum, (int)acknum); */
409
410 skb2 = skb2->next;
411
412 if (ack == NULL)
413 continue;
414
415 /* printk(KERN_DEBUG "check_xmit_queue: %04x, %d\n", acknum, cb2->xmit_count); */
416
417 /* Does _last_ packet acked have xmit_count > 1 */
418 try_retrans = 0;
419 /* Remember to wake up the sending process */
420 wakeup = 1;
421 /* Keep various statistics */
422 pkttime = cb2->stamp;
423 xmit_count = cb2->xmit_count;
424 segnum = cb2->segnum;
425 /* Remove and drop ack'ed packet */
426 skb_unlink(ack);
427 kfree_skb(ack);
428 ack = NULL;
429
430 /*
431 * We don't expect to see acknowledgements for packets we
432 * haven't sent yet.
433 */
434 if (xmit_count == 0)
435 BUG();
436 /*
437 * If the packet has only been sent once, we can use it
438 * to calculate the RTT and also open the window a little
439 * further.
440 */
441 if (xmit_count == 1) {
442 if (equal(segnum, acknum))
443 dn_nsp_rtt(sk, (long)(pkttime - reftime));
444
445 if (scp->snd_window < scp->max_window)
446 scp->snd_window++;
447 }
448
449 /*
450 * Packet has been sent more than once. If this is the last
451 * packet to be acknowledged then we want to send the next
452 * packet in the send queue again (assumes the remote host does
453 * go-back-N error control).
454 */
455 if (xmit_count > 1)
456 try_retrans = 1;
457 }
458
459 if (try_retrans)
460 dn_nsp_output(sk);
461
462 return wakeup;
463 }
464
465 void dn_nsp_send_data_ack(struct sock *sk)
466 {
467 struct sk_buff *skb = NULL;
468
469 if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
470 return;
471
472 skb_reserve(skb, 9);
473 dn_mk_ack_header(sk, skb, 0x04, 9, 0);
474 dn_nsp_send(skb);
475 }
476
477 void dn_nsp_send_oth_ack(struct sock *sk)
478 {
479 struct sk_buff *skb = NULL;
480
481 if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
482 return;
483
484 skb_reserve(skb, 9);
485 dn_mk_ack_header(sk, skb, 0x14, 9, 1);
486 dn_nsp_send(skb);
487 }
488
489
490 void dn_send_conn_ack (struct sock *sk)
491 {
492 struct dn_scp *scp = DN_SK(sk);
493 struct sk_buff *skb = NULL;
494 struct nsp_conn_ack_msg *msg;
495
496 if ((skb = dn_alloc_skb(sk, 3, sk->allocation)) == NULL)
497 return;
498
499 msg = (struct nsp_conn_ack_msg *)skb_put(skb, 3);
500 msg->msgflg = 0x24;
501 msg->dstaddr = scp->addrrem;
502
503 dn_nsp_send(skb);
504 }
505
506 void dn_nsp_delayed_ack(struct sock *sk)
507 {
508 struct dn_scp *scp = DN_SK(sk);
509
510 if (scp->ackxmt_oth != scp->numoth_rcv)
511 dn_nsp_send_oth_ack(sk);
512
513 if (scp->ackxmt_dat != scp->numdat_rcv)
514 dn_nsp_send_data_ack(sk);
515 }
516
517 static int dn_nsp_retrans_conn_conf(struct sock *sk)
518 {
519 struct dn_scp *scp = DN_SK(sk);
520
521 if (scp->state == DN_CC)
522 dn_send_conn_conf(sk, GFP_ATOMIC);
523
524 return 0;
525 }
526
527 void dn_send_conn_conf(struct sock *sk, int gfp)
528 {
529 struct dn_scp *scp = DN_SK(sk);
530 struct sk_buff *skb = NULL;
531 struct nsp_conn_init_msg *msg;
532 unsigned char len = scp->conndata_out.opt_optl;
533
534 if ((skb = dn_alloc_skb(sk, 50 + scp->conndata_out.opt_optl, gfp)) == NULL)
535 return;
536
537 msg = (struct nsp_conn_init_msg *)skb_put(skb, sizeof(*msg));
538 msg->msgflg = 0x28;
539 msg->dstaddr = scp->addrrem;
540 msg->srcaddr = scp->addrloc;
541 msg->services = scp->services_loc;
542 msg->info = scp->info_loc;
543 msg->segsize = dn_htons(scp->segsize_loc);
544
545 *skb_put(skb,1) = len;
546
547 if (len > 0)
548 memcpy(skb_put(skb, len), scp->conndata_out.opt_data, len);
549
550
551 dn_nsp_send(skb);
552
553 scp->persist = dn_nsp_persist(sk);
554 scp->persist_fxn = dn_nsp_retrans_conn_conf;
555 }
556
557
558 static __inline__ void dn_nsp_do_disc(struct sock *sk, unsigned char msgflg,
559 unsigned short reason, int gfp, struct dst_entry *dst,
560 int ddl, unsigned char *dd, __u16 rem, __u16 loc)
561 {
562 struct sk_buff *skb = NULL;
563 int size = 7 + ddl + ((msgflg == NSP_DISCINIT) ? 1 : 0);
564 unsigned char *msg;
565
566 if ((dst == NULL) || (rem == 0)) {
567 if (net_ratelimit())
568 printk(KERN_DEBUG "DECnet: dn_nsp_do_disc: BUG! Please report this to SteveW@ACM.org rem=%u dst=%p\n", (unsigned)rem, dst);
569 return;
570 }
571
572 if ((skb = dn_alloc_skb(sk, size, gfp)) == NULL)
573 return;
574
575 msg = skb_put(skb, size);
576 *msg++ = msgflg;
577 *(__u16 *)msg = rem;
578 msg += 2;
579 *(__u16 *)msg = loc;
580 msg += 2;
581 *(__u16 *)msg = dn_htons(reason);
582 msg += 2;
583 if (msgflg == NSP_DISCINIT)
584 *msg++ = ddl;
585
586 if (ddl) {
587 memcpy(msg, dd, ddl);
588 }
589
590 /*
591 * This doesn't go via the dn_nsp_send() fucntion since we need
592 * to be able to send disc packets out which have no socket
593 * associations.
594 */
595 skb->dst = dst_clone(dst);
596 skb->dst->output(skb);
597 }
598
599
600 void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg,
601 unsigned short reason, int gfp)
602 {
603 struct dn_scp *scp = DN_SK(sk);
604 int ddl = 0;
605
606 if (msgflg == NSP_DISCINIT)
607 ddl = scp->discdata_out.opt_optl;
608
609 if (reason == 0)
610 reason = scp->discdata_out.opt_status;
611
612 dn_nsp_do_disc(sk, msgflg, reason, gfp, sk->dst_cache, ddl,
613 scp->discdata_out.opt_data, scp->addrrem, scp->addrloc);
614 }
615
616
617 void dn_nsp_return_disc(struct sk_buff *skb, unsigned char msgflg,
618 unsigned short reason)
619 {
620 struct dn_skb_cb *cb = DN_SKB_CB(skb);
621 int ddl = 0;
622 int gfp = GFP_ATOMIC;
623
624 dn_nsp_do_disc(NULL, msgflg, reason, gfp, skb->dst, ddl,
625 NULL, cb->src_port, cb->dst_port);
626 }
627
628
629 void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval)
630 {
631 struct dn_scp *scp = DN_SK(sk);
632 struct sk_buff *skb;
633 unsigned short *segnum;
634 unsigned char *ptr;
635 int gfp = GFP_ATOMIC;
636
637 if ((skb = dn_alloc_skb(sk, 13, gfp)) == NULL)
638 return;
639
640 skb_reserve(skb, 13);
641 segnum = dn_mk_ack_header(sk, skb, 0x10, 13, 1);
642 *segnum = dn_htons(scp->numoth);
643 DN_SKB_CB(skb)->segnum = scp->numoth;
644 seq_add(&scp->numoth, 1);
645 ptr = (unsigned char *)(segnum + 1);
646 *ptr++ = lsflags;
647 *ptr = fcval;
648
649 dn_nsp_queue_xmit(sk, skb, gfp, 1);
650
651 scp->persist = dn_nsp_persist(sk);
652 scp->persist_fxn = dn_nsp_xmit_timeout;
653 }
654
655 static int dn_nsp_retrans_conninit(struct sock *sk)
656 {
657 struct dn_scp *scp = DN_SK(sk);
658
659 if (scp->state == DN_CI)
660 dn_nsp_send_conninit(sk, NSP_RCI);
661
662 return 0;
663 }
664
665 void dn_nsp_send_conninit(struct sock *sk, unsigned char msgflg)
666 {
667 struct dn_scp *scp = DN_SK(sk);
668 struct sk_buff *skb = NULL;
669 struct nsp_conn_init_msg *msg;
670 unsigned char aux;
671 unsigned char menuver;
672 struct dn_skb_cb *cb;
673 unsigned char type = 1;
674
675 if ((skb = dn_alloc_skb(sk, 200, (msgflg == NSP_CI) ? sk->allocation : GFP_ATOMIC)) == NULL)
676 return;
677
678 cb = DN_SKB_CB(skb);
679 msg = (struct nsp_conn_init_msg *)skb_put(skb,sizeof(*msg));
680
681 msg->msgflg = msgflg;
682 msg->dstaddr = 0x0000; /* Remote Node will assign it*/
683
684 msg->srcaddr = scp->addrloc;
685 msg->services = scp->services_loc; /* Requested flow control */
686 msg->info = scp->info_loc; /* Version Number */
687 msg->segsize = dn_htons(scp->segsize_loc); /* Max segment size */
688
689 if (scp->peer.sdn_objnum)
690 type = 0;
691
692 skb_put(skb, dn_sockaddr2username(&scp->peer, skb->tail, type));
693 skb_put(skb, dn_sockaddr2username(&scp->addr, skb->tail, 2));
694
695 menuver = DN_MENUVER_ACC | DN_MENUVER_USR;
696 if (scp->peer.sdn_flags & SDF_PROXY)
697 menuver |= DN_MENUVER_PRX;
698 if (scp->peer.sdn_flags & SDF_UICPROXY)
699 menuver |= DN_MENUVER_UIC;
700
701 *skb_put(skb, 1) = menuver; /* Menu Version */
702
703 aux = scp->accessdata.acc_userl;
704 *skb_put(skb, 1) = aux;
705 if (aux > 0)
706 memcpy(skb_put(skb, aux), scp->accessdata.acc_user, aux);
707
708 aux = scp->accessdata.acc_passl;
709 *skb_put(skb, 1) = aux;
710 if (aux > 0)
711 memcpy(skb_put(skb, aux), scp->accessdata.acc_pass, aux);
712
713 aux = scp->accessdata.acc_accl;
714 *skb_put(skb, 1) = aux;
715 if (aux > 0)
716 memcpy(skb_put(skb, aux), scp->accessdata.acc_acc, aux);
717
718 aux = scp->conndata_out.opt_optl;
719 *skb_put(skb, 1) = aux;
720 if (aux > 0)
721 memcpy(skb_put(skb,aux), scp->conndata_out.opt_data, aux);
722
723 scp->persist = dn_nsp_persist(sk);
724 scp->persist_fxn = dn_nsp_retrans_conninit;
725
726 cb->rt_flags = DN_RT_F_RQR;
727
728 dn_nsp_send(skb);
729 }
730
731