dn_nsp_out.c revision badff6d01a8589a1c828b0bf118903ca38627f4e
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 * Steve Whitehouse: Moved dn_nsp_send() in here from route.h 25 */ 26 27/****************************************************************************** 28 (c) 1995-1998 E.M. Serrat emserrat@geocities.com 29 30 This program is free software; you can redistribute it and/or modify 31 it under the terms of the GNU General Public License as published by 32 the Free Software Foundation; either version 2 of the License, or 33 any later version. 34 35 This program is distributed in the hope that it will be useful, 36 but WITHOUT ANY WARRANTY; without even the implied warranty of 37 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 38 GNU General Public License for more details. 39*******************************************************************************/ 40 41#include <linux/errno.h> 42#include <linux/types.h> 43#include <linux/socket.h> 44#include <linux/in.h> 45#include <linux/kernel.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/system.h> 55#include <linux/fcntl.h> 56#include <linux/mm.h> 57#include <linux/termios.h> 58#include <linux/interrupt.h> 59#include <linux/proc_fs.h> 60#include <linux/stat.h> 61#include <linux/init.h> 62#include <linux/poll.h> 63#include <linux/if_packet.h> 64#include <net/neighbour.h> 65#include <net/dst.h> 66#include <net/flow.h> 67#include <net/dn.h> 68#include <net/dn_nsp.h> 69#include <net/dn_dev.h> 70#include <net/dn_route.h> 71 72 73static int nsp_backoff[NSP_MAXRXTSHIFT + 1] = { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 }; 74 75static void dn_nsp_send(struct sk_buff *skb) 76{ 77 struct sock *sk = skb->sk; 78 struct dn_scp *scp = DN_SK(sk); 79 struct dst_entry *dst; 80 struct flowi fl; 81 82 skb_reset_transport_header(skb); 83 scp->stamp = jiffies; 84 85 dst = sk_dst_check(sk, 0); 86 if (dst) { 87try_again: 88 skb->dst = dst; 89 dst_output(skb); 90 return; 91 } 92 93 memset(&fl, 0, sizeof(fl)); 94 fl.oif = sk->sk_bound_dev_if; 95 fl.fld_src = dn_saddr2dn(&scp->addr); 96 fl.fld_dst = dn_saddr2dn(&scp->peer); 97 dn_sk_ports_copy(&fl, scp); 98 fl.proto = DNPROTO_NSP; 99 if (dn_route_output_sock(&sk->sk_dst_cache, &fl, sk, 0) == 0) { 100 dst = sk_dst_get(sk); 101 sk->sk_route_caps = dst->dev->features; 102 goto try_again; 103 } 104 105 sk->sk_err = EHOSTUNREACH; 106 if (!sock_flag(sk, SOCK_DEAD)) 107 sk->sk_state_change(sk); 108} 109 110 111/* 112 * If sk == NULL, then we assume that we are supposed to be making 113 * a routing layer skb. If sk != NULL, then we are supposed to be 114 * creating an skb for the NSP layer. 115 * 116 * The eventual aim is for each socket to have a cached header size 117 * for its outgoing packets, and to set hdr from this when sk != NULL. 118 */ 119struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri) 120{ 121 struct sk_buff *skb; 122 int hdr = 64; 123 124 if ((skb = alloc_skb(size + hdr, pri)) == NULL) 125 return NULL; 126 127 skb->protocol = __constant_htons(ETH_P_DNA_RT); 128 skb->pkt_type = PACKET_OUTGOING; 129 130 if (sk) 131 skb_set_owner_w(skb, sk); 132 133 skb_reserve(skb, hdr); 134 135 return skb; 136} 137 138/* 139 * Calculate persist timer based upon the smoothed round 140 * trip time and the variance. Backoff according to the 141 * nsp_backoff[] array. 142 */ 143unsigned long dn_nsp_persist(struct sock *sk) 144{ 145 struct dn_scp *scp = DN_SK(sk); 146 147 unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1; 148 149 t *= nsp_backoff[scp->nsp_rxtshift]; 150 151 if (t < HZ) t = HZ; 152 if (t > (600*HZ)) t = (600*HZ); 153 154 if (scp->nsp_rxtshift < NSP_MAXRXTSHIFT) 155 scp->nsp_rxtshift++; 156 157 /* printk(KERN_DEBUG "rxtshift %lu, t=%lu\n", scp->nsp_rxtshift, t); */ 158 159 return t; 160} 161 162/* 163 * This is called each time we get an estimate for the rtt 164 * on the link. 165 */ 166static void dn_nsp_rtt(struct sock *sk, long rtt) 167{ 168 struct dn_scp *scp = DN_SK(sk); 169 long srtt = (long)scp->nsp_srtt; 170 long rttvar = (long)scp->nsp_rttvar; 171 long delta; 172 173 /* 174 * If the jiffies clock flips over in the middle of timestamp 175 * gathering this value might turn out negative, so we make sure 176 * that is it always positive here. 177 */ 178 if (rtt < 0) 179 rtt = -rtt; 180 /* 181 * Add new rtt to smoothed average 182 */ 183 delta = ((rtt << 3) - srtt); 184 srtt += (delta >> 3); 185 if (srtt >= 1) 186 scp->nsp_srtt = (unsigned long)srtt; 187 else 188 scp->nsp_srtt = 1; 189 190 /* 191 * Add new rtt varience to smoothed varience 192 */ 193 delta >>= 1; 194 rttvar += ((((delta>0)?(delta):(-delta)) - rttvar) >> 2); 195 if (rttvar >= 1) 196 scp->nsp_rttvar = (unsigned long)rttvar; 197 else 198 scp->nsp_rttvar = 1; 199 200 /* printk(KERN_DEBUG "srtt=%lu rttvar=%lu\n", scp->nsp_srtt, scp->nsp_rttvar); */ 201} 202 203/** 204 * dn_nsp_clone_and_send - Send a data packet by cloning it 205 * @skb: The packet to clone and transmit 206 * @gfp: memory allocation flag 207 * 208 * Clone a queued data or other data packet and transmit it. 209 * 210 * Returns: The number of times the packet has been sent previously 211 */ 212static inline unsigned dn_nsp_clone_and_send(struct sk_buff *skb, 213 gfp_t gfp) 214{ 215 struct dn_skb_cb *cb = DN_SKB_CB(skb); 216 struct sk_buff *skb2; 217 int ret = 0; 218 219 if ((skb2 = skb_clone(skb, gfp)) != NULL) { 220 ret = cb->xmit_count; 221 cb->xmit_count++; 222 cb->stamp = jiffies; 223 skb2->sk = skb->sk; 224 dn_nsp_send(skb2); 225 } 226 227 return ret; 228} 229 230/** 231 * dn_nsp_output - Try and send something from socket queues 232 * @sk: The socket whose queues are to be investigated 233 * @gfp: The memory allocation flags 234 * 235 * Try and send the packet on the end of the data and other data queues. 236 * Other data gets priority over data, and if we retransmit a packet we 237 * reduce the window by dividing it in two. 238 * 239 */ 240void dn_nsp_output(struct sock *sk) 241{ 242 struct dn_scp *scp = DN_SK(sk); 243 struct sk_buff *skb; 244 unsigned reduce_win = 0; 245 246 /* 247 * First we check for otherdata/linkservice messages 248 */ 249 if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL) 250 reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); 251 252 /* 253 * If we may not send any data, we don't. 254 * If we are still trying to get some other data down the 255 * channel, we don't try and send any data. 256 */ 257 if (reduce_win || (scp->flowrem_sw != DN_SEND)) 258 goto recalc_window; 259 260 if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL) 261 reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC); 262 263 /* 264 * If we've sent any frame more than once, we cut the 265 * send window size in half. There is always a minimum 266 * window size of one available. 267 */ 268recalc_window: 269 if (reduce_win) { 270 scp->snd_window >>= 1; 271 if (scp->snd_window < NSP_MIN_WINDOW) 272 scp->snd_window = NSP_MIN_WINDOW; 273 } 274} 275 276int dn_nsp_xmit_timeout(struct sock *sk) 277{ 278 struct dn_scp *scp = DN_SK(sk); 279 280 dn_nsp_output(sk); 281 282 if (!skb_queue_empty(&scp->data_xmit_queue) || 283 !skb_queue_empty(&scp->other_xmit_queue)) 284 scp->persist = dn_nsp_persist(sk); 285 286 return 0; 287} 288 289static inline __le16 *dn_mk_common_header(struct dn_scp *scp, struct sk_buff *skb, unsigned char msgflag, int len) 290{ 291 unsigned char *ptr = skb_push(skb, len); 292 293 BUG_ON(len < 5); 294 295 *ptr++ = msgflag; 296 *((__le16 *)ptr) = scp->addrrem; 297 ptr += 2; 298 *((__le16 *)ptr) = scp->addrloc; 299 ptr += 2; 300 return (__le16 __force *)ptr; 301} 302 303static __le16 *dn_mk_ack_header(struct sock *sk, struct sk_buff *skb, unsigned char msgflag, int hlen, int other) 304{ 305 struct dn_scp *scp = DN_SK(sk); 306 unsigned short acknum = scp->numdat_rcv & 0x0FFF; 307 unsigned short ackcrs = scp->numoth_rcv & 0x0FFF; 308 __le16 *ptr; 309 310 BUG_ON(hlen < 9); 311 312 scp->ackxmt_dat = acknum; 313 scp->ackxmt_oth = ackcrs; 314 acknum |= 0x8000; 315 ackcrs |= 0x8000; 316 317 /* If this is an "other data/ack" message, swap acknum and ackcrs */ 318 if (other) { 319 unsigned short tmp = acknum; 320 acknum = ackcrs; 321 ackcrs = tmp; 322 } 323 324 /* Set "cross subchannel" bit in ackcrs */ 325 ackcrs |= 0x2000; 326 327 ptr = (__le16 *)dn_mk_common_header(scp, skb, msgflag, hlen); 328 329 *ptr++ = dn_htons(acknum); 330 *ptr++ = dn_htons(ackcrs); 331 332 return ptr; 333} 334 335static __le16 *dn_nsp_mk_data_header(struct sock *sk, struct sk_buff *skb, int oth) 336{ 337 struct dn_scp *scp = DN_SK(sk); 338 struct dn_skb_cb *cb = DN_SKB_CB(skb); 339 __le16 *ptr = dn_mk_ack_header(sk, skb, cb->nsp_flags, 11, oth); 340 341 if (unlikely(oth)) { 342 cb->segnum = scp->numoth; 343 seq_add(&scp->numoth, 1); 344 } else { 345 cb->segnum = scp->numdat; 346 seq_add(&scp->numdat, 1); 347 } 348 *(ptr++) = dn_htons(cb->segnum); 349 350 return ptr; 351} 352 353void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, 354 gfp_t gfp, int oth) 355{ 356 struct dn_scp *scp = DN_SK(sk); 357 struct dn_skb_cb *cb = DN_SKB_CB(skb); 358 unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1; 359 360 cb->xmit_count = 0; 361 dn_nsp_mk_data_header(sk, skb, oth); 362 363 /* 364 * Slow start: If we have been idle for more than 365 * one RTT, then reset window to min size. 366 */ 367 if ((jiffies - scp->stamp) > t) 368 scp->snd_window = NSP_MIN_WINDOW; 369 370 if (oth) 371 skb_queue_tail(&scp->other_xmit_queue, skb); 372 else 373 skb_queue_tail(&scp->data_xmit_queue, skb); 374 375 if (scp->flowrem_sw != DN_SEND) 376 return; 377 378 dn_nsp_clone_and_send(skb, gfp); 379} 380 381 382int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum) 383{ 384 struct dn_skb_cb *cb = DN_SKB_CB(skb); 385 struct dn_scp *scp = DN_SK(sk); 386 struct sk_buff *skb2, *list, *ack = NULL; 387 int wakeup = 0; 388 int try_retrans = 0; 389 unsigned long reftime = cb->stamp; 390 unsigned long pkttime; 391 unsigned short xmit_count; 392 unsigned short segnum; 393 394 skb2 = q->next; 395 list = (struct sk_buff *)q; 396 while(list != skb2) { 397 struct dn_skb_cb *cb2 = DN_SKB_CB(skb2); 398 399 if (dn_before_or_equal(cb2->segnum, acknum)) 400 ack = skb2; 401 402 /* printk(KERN_DEBUG "ack: %s %04x %04x\n", ack ? "ACK" : "SKIP", (int)cb2->segnum, (int)acknum); */ 403 404 skb2 = skb2->next; 405 406 if (ack == NULL) 407 continue; 408 409 /* printk(KERN_DEBUG "check_xmit_queue: %04x, %d\n", acknum, cb2->xmit_count); */ 410 411 /* Does _last_ packet acked have xmit_count > 1 */ 412 try_retrans = 0; 413 /* Remember to wake up the sending process */ 414 wakeup = 1; 415 /* Keep various statistics */ 416 pkttime = cb2->stamp; 417 xmit_count = cb2->xmit_count; 418 segnum = cb2->segnum; 419 /* Remove and drop ack'ed packet */ 420 skb_unlink(ack, q); 421 kfree_skb(ack); 422 ack = NULL; 423 424 /* 425 * We don't expect to see acknowledgements for packets we 426 * haven't sent yet. 427 */ 428 WARN_ON(xmit_count == 0); 429 430 /* 431 * If the packet has only been sent once, we can use it 432 * to calculate the RTT and also open the window a little 433 * further. 434 */ 435 if (xmit_count == 1) { 436 if (dn_equal(segnum, acknum)) 437 dn_nsp_rtt(sk, (long)(pkttime - reftime)); 438 439 if (scp->snd_window < scp->max_window) 440 scp->snd_window++; 441 } 442 443 /* 444 * Packet has been sent more than once. If this is the last 445 * packet to be acknowledged then we want to send the next 446 * packet in the send queue again (assumes the remote host does 447 * go-back-N error control). 448 */ 449 if (xmit_count > 1) 450 try_retrans = 1; 451 } 452 453 if (try_retrans) 454 dn_nsp_output(sk); 455 456 return wakeup; 457} 458 459void dn_nsp_send_data_ack(struct sock *sk) 460{ 461 struct sk_buff *skb = NULL; 462 463 if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL) 464 return; 465 466 skb_reserve(skb, 9); 467 dn_mk_ack_header(sk, skb, 0x04, 9, 0); 468 dn_nsp_send(skb); 469} 470 471void dn_nsp_send_oth_ack(struct sock *sk) 472{ 473 struct sk_buff *skb = NULL; 474 475 if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL) 476 return; 477 478 skb_reserve(skb, 9); 479 dn_mk_ack_header(sk, skb, 0x14, 9, 1); 480 dn_nsp_send(skb); 481} 482 483 484void dn_send_conn_ack (struct sock *sk) 485{ 486 struct dn_scp *scp = DN_SK(sk); 487 struct sk_buff *skb = NULL; 488 struct nsp_conn_ack_msg *msg; 489 490 if ((skb = dn_alloc_skb(sk, 3, sk->sk_allocation)) == NULL) 491 return; 492 493 msg = (struct nsp_conn_ack_msg *)skb_put(skb, 3); 494 msg->msgflg = 0x24; 495 msg->dstaddr = scp->addrrem; 496 497 dn_nsp_send(skb); 498} 499 500void dn_nsp_delayed_ack(struct sock *sk) 501{ 502 struct dn_scp *scp = DN_SK(sk); 503 504 if (scp->ackxmt_oth != scp->numoth_rcv) 505 dn_nsp_send_oth_ack(sk); 506 507 if (scp->ackxmt_dat != scp->numdat_rcv) 508 dn_nsp_send_data_ack(sk); 509} 510 511static int dn_nsp_retrans_conn_conf(struct sock *sk) 512{ 513 struct dn_scp *scp = DN_SK(sk); 514 515 if (scp->state == DN_CC) 516 dn_send_conn_conf(sk, GFP_ATOMIC); 517 518 return 0; 519} 520 521void dn_send_conn_conf(struct sock *sk, gfp_t gfp) 522{ 523 struct dn_scp *scp = DN_SK(sk); 524 struct sk_buff *skb = NULL; 525 struct nsp_conn_init_msg *msg; 526 __u8 len = (__u8)dn_ntohs(scp->conndata_out.opt_optl); 527 528 if ((skb = dn_alloc_skb(sk, 50 + len, gfp)) == NULL) 529 return; 530 531 msg = (struct nsp_conn_init_msg *)skb_put(skb, sizeof(*msg)); 532 msg->msgflg = 0x28; 533 msg->dstaddr = scp->addrrem; 534 msg->srcaddr = scp->addrloc; 535 msg->services = scp->services_loc; 536 msg->info = scp->info_loc; 537 msg->segsize = dn_htons(scp->segsize_loc); 538 539 *skb_put(skb,1) = len; 540 541 if (len > 0) 542 memcpy(skb_put(skb, len), scp->conndata_out.opt_data, len); 543 544 545 dn_nsp_send(skb); 546 547 scp->persist = dn_nsp_persist(sk); 548 scp->persist_fxn = dn_nsp_retrans_conn_conf; 549} 550 551 552static __inline__ void dn_nsp_do_disc(struct sock *sk, unsigned char msgflg, 553 unsigned short reason, gfp_t gfp, 554 struct dst_entry *dst, 555 int ddl, unsigned char *dd, __le16 rem, __le16 loc) 556{ 557 struct sk_buff *skb = NULL; 558 int size = 7 + ddl + ((msgflg == NSP_DISCINIT) ? 1 : 0); 559 unsigned char *msg; 560 561 if ((dst == NULL) || (rem == 0)) { 562 if (net_ratelimit()) 563 printk(KERN_DEBUG "DECnet: dn_nsp_do_disc: BUG! Please report this to SteveW@ACM.org rem=%u dst=%p\n", dn_ntohs(rem), dst); 564 return; 565 } 566 567 if ((skb = dn_alloc_skb(sk, size, gfp)) == NULL) 568 return; 569 570 msg = skb_put(skb, size); 571 *msg++ = msgflg; 572 *(__le16 *)msg = rem; 573 msg += 2; 574 *(__le16 *)msg = loc; 575 msg += 2; 576 *(__le16 *)msg = dn_htons(reason); 577 msg += 2; 578 if (msgflg == NSP_DISCINIT) 579 *msg++ = ddl; 580 581 if (ddl) { 582 memcpy(msg, dd, ddl); 583 } 584 585 /* 586 * This doesn't go via the dn_nsp_send() function since we need 587 * to be able to send disc packets out which have no socket 588 * associations. 589 */ 590 skb->dst = dst_clone(dst); 591 dst_output(skb); 592} 593 594 595void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg, 596 unsigned short reason, gfp_t gfp) 597{ 598 struct dn_scp *scp = DN_SK(sk); 599 int ddl = 0; 600 601 if (msgflg == NSP_DISCINIT) 602 ddl = dn_ntohs(scp->discdata_out.opt_optl); 603 604 if (reason == 0) 605 reason = dn_ntohs(scp->discdata_out.opt_status); 606 607 dn_nsp_do_disc(sk, msgflg, reason, gfp, sk->sk_dst_cache, ddl, 608 scp->discdata_out.opt_data, scp->addrrem, scp->addrloc); 609} 610 611 612void dn_nsp_return_disc(struct sk_buff *skb, unsigned char msgflg, 613 unsigned short reason) 614{ 615 struct dn_skb_cb *cb = DN_SKB_CB(skb); 616 int ddl = 0; 617 gfp_t gfp = GFP_ATOMIC; 618 619 dn_nsp_do_disc(NULL, msgflg, reason, gfp, skb->dst, ddl, 620 NULL, cb->src_port, cb->dst_port); 621} 622 623 624void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval) 625{ 626 struct dn_scp *scp = DN_SK(sk); 627 struct sk_buff *skb; 628 unsigned char *ptr; 629 gfp_t gfp = GFP_ATOMIC; 630 631 if ((skb = dn_alloc_skb(sk, DN_MAX_NSP_DATA_HEADER + 2, gfp)) == NULL) 632 return; 633 634 skb_reserve(skb, DN_MAX_NSP_DATA_HEADER); 635 ptr = skb_put(skb, 2); 636 DN_SKB_CB(skb)->nsp_flags = 0x10; 637 *ptr++ = lsflags; 638 *ptr = fcval; 639 640 dn_nsp_queue_xmit(sk, skb, gfp, 1); 641 642 scp->persist = dn_nsp_persist(sk); 643 scp->persist_fxn = dn_nsp_xmit_timeout; 644} 645 646static int dn_nsp_retrans_conninit(struct sock *sk) 647{ 648 struct dn_scp *scp = DN_SK(sk); 649 650 if (scp->state == DN_CI) 651 dn_nsp_send_conninit(sk, NSP_RCI); 652 653 return 0; 654} 655 656void dn_nsp_send_conninit(struct sock *sk, unsigned char msgflg) 657{ 658 struct dn_scp *scp = DN_SK(sk); 659 struct nsp_conn_init_msg *msg; 660 unsigned char aux; 661 unsigned char menuver; 662 struct dn_skb_cb *cb; 663 unsigned char type = 1; 664 gfp_t allocation = (msgflg == NSP_CI) ? sk->sk_allocation : GFP_ATOMIC; 665 struct sk_buff *skb = dn_alloc_skb(sk, 200, allocation); 666 667 if (!skb) 668 return; 669 670 cb = DN_SKB_CB(skb); 671 msg = (struct nsp_conn_init_msg *)skb_put(skb,sizeof(*msg)); 672 673 msg->msgflg = msgflg; 674 msg->dstaddr = 0x0000; /* Remote Node will assign it*/ 675 676 msg->srcaddr = scp->addrloc; 677 msg->services = scp->services_loc; /* Requested flow control */ 678 msg->info = scp->info_loc; /* Version Number */ 679 msg->segsize = dn_htons(scp->segsize_loc); /* Max segment size */ 680 681 if (scp->peer.sdn_objnum) 682 type = 0; 683 684 skb_put(skb, dn_sockaddr2username(&scp->peer, skb->tail, type)); 685 skb_put(skb, dn_sockaddr2username(&scp->addr, skb->tail, 2)); 686 687 menuver = DN_MENUVER_ACC | DN_MENUVER_USR; 688 if (scp->peer.sdn_flags & SDF_PROXY) 689 menuver |= DN_MENUVER_PRX; 690 if (scp->peer.sdn_flags & SDF_UICPROXY) 691 menuver |= DN_MENUVER_UIC; 692 693 *skb_put(skb, 1) = menuver; /* Menu Version */ 694 695 aux = scp->accessdata.acc_userl; 696 *skb_put(skb, 1) = aux; 697 if (aux > 0) 698 memcpy(skb_put(skb, aux), scp->accessdata.acc_user, aux); 699 700 aux = scp->accessdata.acc_passl; 701 *skb_put(skb, 1) = aux; 702 if (aux > 0) 703 memcpy(skb_put(skb, aux), scp->accessdata.acc_pass, aux); 704 705 aux = scp->accessdata.acc_accl; 706 *skb_put(skb, 1) = aux; 707 if (aux > 0) 708 memcpy(skb_put(skb, aux), scp->accessdata.acc_acc, aux); 709 710 aux = (__u8)dn_ntohs(scp->conndata_out.opt_optl); 711 *skb_put(skb, 1) = aux; 712 if (aux > 0) 713 memcpy(skb_put(skb,aux), scp->conndata_out.opt_data, aux); 714 715 scp->persist = dn_nsp_persist(sk); 716 scp->persist_fxn = dn_nsp_retrans_conninit; 717 718 cb->rt_flags = DN_RT_F_RQR; 719 720 dn_nsp_send(skb); 721} 722 723