1/* 2 * DECnet An implementation of the DECnet protocol suite for the LINUX 3 * operating system. DECnet is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * DECnet Network Services Protocol (Output) 7 * 8 * Author: Eduardo Marcelo Serrat <emserrat@geocities.com> 9 * 10 * Changes: 11 * 12 * Steve Whitehouse: Split into dn_nsp_in.c and dn_nsp_out.c from 13 * original dn_nsp.c. 14 * Steve Whitehouse: Updated to work with my new routing architecture. 15 * Steve Whitehouse: Added changes from Eduardo Serrat's patches. 16 * Steve Whitehouse: Now conninits have the "return" bit set. 17 * Steve Whitehouse: Fixes to check alloc'd skbs are non NULL! 18 * Moved output state machine into one function 19 * Steve Whitehouse: New output state machine 20 * Paul Koning: Connect Confirm message fix. 21 * Eduardo Serrat: Fix to stop dn_nsp_do_disc() sending malformed packets. 22 * Steve Whitehouse: dn_nsp_output() and friends needed a spring clean 23 * Steve Whitehouse: Moved dn_nsp_send() in here from route.h 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/timer.h> 46#include <linux/string.h> 47#include <linux/sockios.h> 48#include <linux/net.h> 49#include <linux/netdevice.h> 50#include <linux/inet.h> 51#include <linux/route.h> 52#include <linux/slab.h> 53#include <net/sock.h> 54#include <linux/fcntl.h> 55#include <linux/mm.h> 56#include <linux/termios.h> 57#include <linux/interrupt.h> 58#include <linux/proc_fs.h> 59#include <linux/stat.h> 60#include <linux/init.h> 61#include <linux/poll.h> 62#include <linux/if_packet.h> 63#include <net/neighbour.h> 64#include <net/dst.h> 65#include <net/flow.h> 66#include <net/dn.h> 67#include <net/dn_nsp.h> 68#include <net/dn_dev.h> 69#include <net/dn_route.h> 70 71 72static int nsp_backoff[NSP_MAXRXTSHIFT + 1] = { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 }; 73 74static void dn_nsp_send(struct sk_buff *skb) 75{ 76 struct sock *sk = skb->sk; 77 struct dn_scp *scp = DN_SK(sk); 78 struct dst_entry *dst; 79 struct flowidn fld; 80 81 skb_reset_transport_header(skb); 82 scp->stamp = jiffies; 83 84 dst = sk_dst_check(sk, 0); 85 if (dst) { 86try_again: 87 skb_dst_set(skb, dst); 88 dst_output(skb); 89 return; 90 } 91 92 memset(&fld, 0, sizeof(fld)); 93 fld.flowidn_oif = sk->sk_bound_dev_if; 94 fld.saddr = dn_saddr2dn(&scp->addr); 95 fld.daddr = dn_saddr2dn(&scp->peer); 96 dn_sk_ports_copy(&fld, scp); 97 fld.flowidn_proto = DNPROTO_NSP; 98 if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, 0) == 0) { 99 dst = sk_dst_get(sk); 100 sk->sk_route_caps = dst->dev->features; 101 goto try_again; 102 } 103 104 sk->sk_err = EHOSTUNREACH; 105 if (!sock_flag(sk, SOCK_DEAD)) 106 sk->sk_state_change(sk); 107} 108 109 110/* 111 * If sk == NULL, then we assume that we are supposed to be making 112 * a routing layer skb. If sk != NULL, then we are supposed to be 113 * creating an skb for the NSP layer. 114 * 115 * The eventual aim is for each socket to have a cached header size 116 * for its outgoing packets, and to set hdr from this when sk != NULL. 117 */ 118struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri) 119{ 120 struct sk_buff *skb; 121 int hdr = 64; 122 123 if ((skb = alloc_skb(size + hdr, pri)) == NULL) 124 return NULL; 125 126 skb->protocol = htons(ETH_P_DNA_RT); 127 skb->pkt_type = PACKET_OUTGOING; 128 129 if (sk) 130 skb_set_owner_w(skb, sk); 131 132 skb_reserve(skb, hdr); 133 134 return skb; 135} 136 137/* 138 * Calculate persist timer based upon the smoothed round 139 * trip time and the variance. Backoff according to the 140 * nsp_backoff[] array. 141 */ 142unsigned long dn_nsp_persist(struct sock *sk) 143{ 144 struct dn_scp *scp = DN_SK(sk); 145 146 unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1; 147 148 t *= nsp_backoff[scp->nsp_rxtshift]; 149 150 if (t < HZ) t = HZ; 151 if (t > (600*HZ)) t = (600*HZ); 152 153 if (scp->nsp_rxtshift < NSP_MAXRXTSHIFT) 154 scp->nsp_rxtshift++; 155 156 /* printk(KERN_DEBUG "rxtshift %lu, t=%lu\n", scp->nsp_rxtshift, t); */ 157 158 return t; 159} 160 161/* 162 * This is called each time we get an estimate for the rtt 163 * on the link. 164 */ 165static void dn_nsp_rtt(struct sock *sk, long rtt) 166{ 167 struct dn_scp *scp = DN_SK(sk); 168 long srtt = (long)scp->nsp_srtt; 169 long rttvar = (long)scp->nsp_rttvar; 170 long delta; 171 172 /* 173 * If the jiffies clock flips over in the middle of timestamp 174 * gathering this value might turn out negative, so we make sure 175 * that is it always positive here. 176 */ 177 if (rtt < 0) 178 rtt = -rtt; 179 /* 180 * Add new rtt to smoothed average 181 */ 182 delta = ((rtt << 3) - srtt); 183 srtt += (delta >> 3); 184 if (srtt >= 1) 185 scp->nsp_srtt = (unsigned long)srtt; 186 else 187 scp->nsp_srtt = 1; 188 189 /* 190 * Add new rtt varience to smoothed varience 191 */ 192 delta >>= 1; 193 rttvar += ((((delta>0)?(delta):(-delta)) - rttvar) >> 2); 194 if (rttvar >= 1) 195 scp->nsp_rttvar = (unsigned long)rttvar; 196 else 197 scp->nsp_rttvar = 1; 198 199 /* printk(KERN_DEBUG "srtt=%lu rttvar=%lu\n", scp->nsp_srtt, scp->nsp_rttvar); */ 200} 201 202/** 203 * dn_nsp_clone_and_send - Send a data packet by cloning it 204 * @skb: The packet to clone and transmit 205 * @gfp: memory allocation flag 206 * 207 * Clone a queued data or other data packet and transmit it. 208 * 209 * Returns: The number of times the packet has been sent previously 210 */ 211static inline unsigned int dn_nsp_clone_and_send(struct sk_buff *skb, 212 gfp_t gfp) 213{ 214 struct dn_skb_cb *cb = DN_SKB_CB(skb); 215 struct sk_buff *skb2; 216 int ret = 0; 217 218 if ((skb2 = skb_clone(skb, gfp)) != NULL) { 219 ret = cb->xmit_count; 220 cb->xmit_count++; 221 cb->stamp = jiffies; 222 skb2->sk = skb->sk; 223 dn_nsp_send(skb2); 224 } 225 226 return ret; 227} 228 229/** 230 * dn_nsp_output - Try and send something from socket queues 231 * @sk: The socket whose queues are to be investigated 232 * 233 * Try and send the packet on the end of the data and other data queues. 234 * Other data gets priority over data, and if we retransmit a packet we 235 * reduce the window by dividing it in two. 236 * 237 */ 238void dn_nsp_output(struct sock *sk) 239{ 240 struct dn_scp *scp = DN_SK(sk); 241 struct sk_buff *skb; 242 unsigned int reduce_win = 0; 243 244 /* 245 * First we check for otherdata/linkservice messages 246 */ 247 if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL) 248 reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); 249 250 /* 251 * If we may not send any data, we don't. 252 * If we are still trying to get some other data down the 253 * channel, we don't try and send any data. 254 */ 255 if (reduce_win || (scp->flowrem_sw != DN_SEND)) 256 goto recalc_window; 257 258 if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL) 259 reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); 260 261 /* 262 * If we've sent any frame more than once, we cut the 263 * send window size in half. There is always a minimum 264 * window size of one available. 265 */ 266recalc_window: 267 if (reduce_win) { 268 scp->snd_window >>= 1; 269 if (scp->snd_window < NSP_MIN_WINDOW) 270 scp->snd_window = NSP_MIN_WINDOW; 271 } 272} 273 274int dn_nsp_xmit_timeout(struct sock *sk) 275{ 276 struct dn_scp *scp = DN_SK(sk); 277 278 dn_nsp_output(sk); 279 280 if (!skb_queue_empty(&scp->data_xmit_queue) || 281 !skb_queue_empty(&scp->other_xmit_queue)) 282 scp->persist = dn_nsp_persist(sk); 283 284 return 0; 285} 286 287static inline __le16 *dn_mk_common_header(struct dn_scp *scp, struct sk_buff *skb, unsigned char msgflag, int len) 288{ 289 unsigned char *ptr = skb_push(skb, len); 290 291 BUG_ON(len < 5); 292 293 *ptr++ = msgflag; 294 *((__le16 *)ptr) = scp->addrrem; 295 ptr += 2; 296 *((__le16 *)ptr) = scp->addrloc; 297 ptr += 2; 298 return (__le16 __force *)ptr; 299} 300 301static __le16 *dn_mk_ack_header(struct sock *sk, struct sk_buff *skb, unsigned char msgflag, int hlen, int other) 302{ 303 struct dn_scp *scp = DN_SK(sk); 304 unsigned short acknum = scp->numdat_rcv & 0x0FFF; 305 unsigned short ackcrs = scp->numoth_rcv & 0x0FFF; 306 __le16 *ptr; 307 308 BUG_ON(hlen < 9); 309 310 scp->ackxmt_dat = acknum; 311 scp->ackxmt_oth = ackcrs; 312 acknum |= 0x8000; 313 ackcrs |= 0x8000; 314 315 /* If this is an "other data/ack" message, swap acknum and ackcrs */ 316 if (other) { 317 unsigned short tmp = acknum; 318 acknum = ackcrs; 319 ackcrs = tmp; 320 } 321 322 /* Set "cross subchannel" bit in ackcrs */ 323 ackcrs |= 0x2000; 324 325 ptr = dn_mk_common_header(scp, skb, msgflag, hlen); 326 327 *ptr++ = cpu_to_le16(acknum); 328 *ptr++ = cpu_to_le16(ackcrs); 329 330 return ptr; 331} 332 333static __le16 *dn_nsp_mk_data_header(struct sock *sk, struct sk_buff *skb, int oth) 334{ 335 struct dn_scp *scp = DN_SK(sk); 336 struct dn_skb_cb *cb = DN_SKB_CB(skb); 337 __le16 *ptr = dn_mk_ack_header(sk, skb, cb->nsp_flags, 11, oth); 338 339 if (unlikely(oth)) { 340 cb->segnum = scp->numoth; 341 seq_add(&scp->numoth, 1); 342 } else { 343 cb->segnum = scp->numdat; 344 seq_add(&scp->numdat, 1); 345 } 346 *(ptr++) = cpu_to_le16(cb->segnum); 347 348 return ptr; 349} 350 351void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, 352 gfp_t gfp, int oth) 353{ 354 struct dn_scp *scp = DN_SK(sk); 355 struct dn_skb_cb *cb = DN_SKB_CB(skb); 356 unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1; 357 358 cb->xmit_count = 0; 359 dn_nsp_mk_data_header(sk, skb, oth); 360 361 /* 362 * Slow start: If we have been idle for more than 363 * one RTT, then reset window to min size. 364 */ 365 if ((jiffies - scp->stamp) > t) 366 scp->snd_window = NSP_MIN_WINDOW; 367 368 if (oth) 369 skb_queue_tail(&scp->other_xmit_queue, skb); 370 else 371 skb_queue_tail(&scp->data_xmit_queue, skb); 372 373 if (scp->flowrem_sw != DN_SEND) 374 return; 375 376 dn_nsp_clone_and_send(skb, gfp); 377} 378 379 380int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum) 381{ 382 struct dn_skb_cb *cb = DN_SKB_CB(skb); 383 struct dn_scp *scp = DN_SK(sk); 384 struct sk_buff *skb2, *n, *ack = NULL; 385 int wakeup = 0; 386 int try_retrans = 0; 387 unsigned long reftime = cb->stamp; 388 unsigned long pkttime; 389 unsigned short xmit_count; 390 unsigned short segnum; 391 392 skb_queue_walk_safe(q, skb2, n) { 393 struct dn_skb_cb *cb2 = DN_SKB_CB(skb2); 394 395 if (dn_before_or_equal(cb2->segnum, acknum)) 396 ack = skb2; 397 398 /* printk(KERN_DEBUG "ack: %s %04x %04x\n", ack ? "ACK" : "SKIP", (int)cb2->segnum, (int)acknum); */ 399 400 if (ack == NULL) 401 continue; 402 403 /* printk(KERN_DEBUG "check_xmit_queue: %04x, %d\n", acknum, cb2->xmit_count); */ 404 405 /* Does _last_ packet acked have xmit_count > 1 */ 406 try_retrans = 0; 407 /* Remember to wake up the sending process */ 408 wakeup = 1; 409 /* Keep various statistics */ 410 pkttime = cb2->stamp; 411 xmit_count = cb2->xmit_count; 412 segnum = cb2->segnum; 413 /* Remove and drop ack'ed packet */ 414 skb_unlink(ack, q); 415 kfree_skb(ack); 416 ack = NULL; 417 418 /* 419 * We don't expect to see acknowledgements for packets we 420 * haven't sent yet. 421 */ 422 WARN_ON(xmit_count == 0); 423 424 /* 425 * If the packet has only been sent once, we can use it 426 * to calculate the RTT and also open the window a little 427 * further. 428 */ 429 if (xmit_count == 1) { 430 if (dn_equal(segnum, acknum)) 431 dn_nsp_rtt(sk, (long)(pkttime - reftime)); 432 433 if (scp->snd_window < scp->max_window) 434 scp->snd_window++; 435 } 436 437 /* 438 * Packet has been sent more than once. If this is the last 439 * packet to be acknowledged then we want to send the next 440 * packet in the send queue again (assumes the remote host does 441 * go-back-N error control). 442 */ 443 if (xmit_count > 1) 444 try_retrans = 1; 445 } 446 447 if (try_retrans) 448 dn_nsp_output(sk); 449 450 return wakeup; 451} 452 453void dn_nsp_send_data_ack(struct sock *sk) 454{ 455 struct sk_buff *skb = NULL; 456 457 if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL) 458 return; 459 460 skb_reserve(skb, 9); 461 dn_mk_ack_header(sk, skb, 0x04, 9, 0); 462 dn_nsp_send(skb); 463} 464 465void dn_nsp_send_oth_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, 0x14, 9, 1); 474 dn_nsp_send(skb); 475} 476 477 478void dn_send_conn_ack (struct sock *sk) 479{ 480 struct dn_scp *scp = DN_SK(sk); 481 struct sk_buff *skb = NULL; 482 struct nsp_conn_ack_msg *msg; 483 484 if ((skb = dn_alloc_skb(sk, 3, sk->sk_allocation)) == NULL) 485 return; 486 487 msg = (struct nsp_conn_ack_msg *)skb_put(skb, 3); 488 msg->msgflg = 0x24; 489 msg->dstaddr = scp->addrrem; 490 491 dn_nsp_send(skb); 492} 493 494void dn_nsp_delayed_ack(struct sock *sk) 495{ 496 struct dn_scp *scp = DN_SK(sk); 497 498 if (scp->ackxmt_oth != scp->numoth_rcv) 499 dn_nsp_send_oth_ack(sk); 500 501 if (scp->ackxmt_dat != scp->numdat_rcv) 502 dn_nsp_send_data_ack(sk); 503} 504 505static int dn_nsp_retrans_conn_conf(struct sock *sk) 506{ 507 struct dn_scp *scp = DN_SK(sk); 508 509 if (scp->state == DN_CC) 510 dn_send_conn_conf(sk, GFP_ATOMIC); 511 512 return 0; 513} 514 515void dn_send_conn_conf(struct sock *sk, gfp_t gfp) 516{ 517 struct dn_scp *scp = DN_SK(sk); 518 struct sk_buff *skb = NULL; 519 struct nsp_conn_init_msg *msg; 520 __u8 len = (__u8)le16_to_cpu(scp->conndata_out.opt_optl); 521 522 if ((skb = dn_alloc_skb(sk, 50 + len, gfp)) == NULL) 523 return; 524 525 msg = (struct nsp_conn_init_msg *)skb_put(skb, sizeof(*msg)); 526 msg->msgflg = 0x28; 527 msg->dstaddr = scp->addrrem; 528 msg->srcaddr = scp->addrloc; 529 msg->services = scp->services_loc; 530 msg->info = scp->info_loc; 531 msg->segsize = cpu_to_le16(scp->segsize_loc); 532 533 *skb_put(skb,1) = len; 534 535 if (len > 0) 536 memcpy(skb_put(skb, len), scp->conndata_out.opt_data, len); 537 538 539 dn_nsp_send(skb); 540 541 scp->persist = dn_nsp_persist(sk); 542 scp->persist_fxn = dn_nsp_retrans_conn_conf; 543} 544 545 546static __inline__ void dn_nsp_do_disc(struct sock *sk, unsigned char msgflg, 547 unsigned short reason, gfp_t gfp, 548 struct dst_entry *dst, 549 int ddl, unsigned char *dd, __le16 rem, __le16 loc) 550{ 551 struct sk_buff *skb = NULL; 552 int size = 7 + ddl + ((msgflg == NSP_DISCINIT) ? 1 : 0); 553 unsigned char *msg; 554 555 if ((dst == NULL) || (rem == 0)) { 556 net_dbg_ratelimited("DECnet: dn_nsp_do_disc: BUG! Please report this to SteveW@ACM.org rem=%u dst=%p\n", 557 le16_to_cpu(rem), dst); 558 return; 559 } 560 561 if ((skb = dn_alloc_skb(sk, size, gfp)) == NULL) 562 return; 563 564 msg = skb_put(skb, size); 565 *msg++ = msgflg; 566 *(__le16 *)msg = rem; 567 msg += 2; 568 *(__le16 *)msg = loc; 569 msg += 2; 570 *(__le16 *)msg = cpu_to_le16(reason); 571 msg += 2; 572 if (msgflg == NSP_DISCINIT) 573 *msg++ = ddl; 574 575 if (ddl) { 576 memcpy(msg, dd, ddl); 577 } 578 579 /* 580 * This doesn't go via the dn_nsp_send() function since we need 581 * to be able to send disc packets out which have no socket 582 * associations. 583 */ 584 skb_dst_set(skb, dst_clone(dst)); 585 dst_output(skb); 586} 587 588 589void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg, 590 unsigned short reason, gfp_t gfp) 591{ 592 struct dn_scp *scp = DN_SK(sk); 593 int ddl = 0; 594 595 if (msgflg == NSP_DISCINIT) 596 ddl = le16_to_cpu(scp->discdata_out.opt_optl); 597 598 if (reason == 0) 599 reason = le16_to_cpu(scp->discdata_out.opt_status); 600 601 dn_nsp_do_disc(sk, msgflg, reason, gfp, __sk_dst_get(sk), ddl, 602 scp->discdata_out.opt_data, scp->addrrem, scp->addrloc); 603} 604 605 606void dn_nsp_return_disc(struct sk_buff *skb, unsigned char msgflg, 607 unsigned short reason) 608{ 609 struct dn_skb_cb *cb = DN_SKB_CB(skb); 610 int ddl = 0; 611 gfp_t gfp = GFP_ATOMIC; 612 613 dn_nsp_do_disc(NULL, msgflg, reason, gfp, skb_dst(skb), ddl, 614 NULL, cb->src_port, cb->dst_port); 615} 616 617 618void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval) 619{ 620 struct dn_scp *scp = DN_SK(sk); 621 struct sk_buff *skb; 622 unsigned char *ptr; 623 gfp_t gfp = GFP_ATOMIC; 624 625 if ((skb = dn_alloc_skb(sk, DN_MAX_NSP_DATA_HEADER + 2, gfp)) == NULL) 626 return; 627 628 skb_reserve(skb, DN_MAX_NSP_DATA_HEADER); 629 ptr = skb_put(skb, 2); 630 DN_SKB_CB(skb)->nsp_flags = 0x10; 631 *ptr++ = lsflags; 632 *ptr = fcval; 633 634 dn_nsp_queue_xmit(sk, skb, gfp, 1); 635 636 scp->persist = dn_nsp_persist(sk); 637 scp->persist_fxn = dn_nsp_xmit_timeout; 638} 639 640static int dn_nsp_retrans_conninit(struct sock *sk) 641{ 642 struct dn_scp *scp = DN_SK(sk); 643 644 if (scp->state == DN_CI) 645 dn_nsp_send_conninit(sk, NSP_RCI); 646 647 return 0; 648} 649 650void dn_nsp_send_conninit(struct sock *sk, unsigned char msgflg) 651{ 652 struct dn_scp *scp = DN_SK(sk); 653 struct nsp_conn_init_msg *msg; 654 unsigned char aux; 655 unsigned char menuver; 656 struct dn_skb_cb *cb; 657 unsigned char type = 1; 658 gfp_t allocation = (msgflg == NSP_CI) ? sk->sk_allocation : GFP_ATOMIC; 659 struct sk_buff *skb = dn_alloc_skb(sk, 200, allocation); 660 661 if (!skb) 662 return; 663 664 cb = DN_SKB_CB(skb); 665 msg = (struct nsp_conn_init_msg *)skb_put(skb,sizeof(*msg)); 666 667 msg->msgflg = msgflg; 668 msg->dstaddr = 0x0000; /* Remote Node will assign it*/ 669 670 msg->srcaddr = scp->addrloc; 671 msg->services = scp->services_loc; /* Requested flow control */ 672 msg->info = scp->info_loc; /* Version Number */ 673 msg->segsize = cpu_to_le16(scp->segsize_loc); /* Max segment size */ 674 675 if (scp->peer.sdn_objnum) 676 type = 0; 677 678 skb_put(skb, dn_sockaddr2username(&scp->peer, 679 skb_tail_pointer(skb), type)); 680 skb_put(skb, dn_sockaddr2username(&scp->addr, 681 skb_tail_pointer(skb), 2)); 682 683 menuver = DN_MENUVER_ACC | DN_MENUVER_USR; 684 if (scp->peer.sdn_flags & SDF_PROXY) 685 menuver |= DN_MENUVER_PRX; 686 if (scp->peer.sdn_flags & SDF_UICPROXY) 687 menuver |= DN_MENUVER_UIC; 688 689 *skb_put(skb, 1) = menuver; /* Menu Version */ 690 691 aux = scp->accessdata.acc_userl; 692 *skb_put(skb, 1) = aux; 693 if (aux > 0) 694 memcpy(skb_put(skb, aux), scp->accessdata.acc_user, aux); 695 696 aux = scp->accessdata.acc_passl; 697 *skb_put(skb, 1) = aux; 698 if (aux > 0) 699 memcpy(skb_put(skb, aux), scp->accessdata.acc_pass, aux); 700 701 aux = scp->accessdata.acc_accl; 702 *skb_put(skb, 1) = aux; 703 if (aux > 0) 704 memcpy(skb_put(skb, aux), scp->accessdata.acc_acc, aux); 705 706 aux = (__u8)le16_to_cpu(scp->conndata_out.opt_optl); 707 *skb_put(skb, 1) = aux; 708 if (aux > 0) 709 memcpy(skb_put(skb, aux), scp->conndata_out.opt_data, aux); 710 711 scp->persist = dn_nsp_persist(sk); 712 scp->persist_fxn = dn_nsp_retrans_conninit; 713 714 cb->rt_flags = DN_RT_F_RQR; 715 716 dn_nsp_send(skb); 717} 718 719