Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 782 insertions, 0 deletions

diff --git a/net/decnet/dn_nsp_out.c b/net/decnet/dn_nsp_out.c
new file mode 100644
index 000000000000..42abbf3f524f
--- /dev/null
+++ b/net/decnet/dn_nsp_out.c
@@ -0,0 +1,782 @@
+
+/*
+ * DECnet       An implementation of the DECnet protocol suite for the LINUX
+ *              operating system.  DECnet is implemented using the  BSD Socket
+ *              interface as the means of communication with the user level.
+ *
+ *              DECnet Network Services Protocol (Output)
+ *
+ * Author:      Eduardo Marcelo Serrat <emserrat@geocities.com>
+ *
+ * Changes:
+ *
+ *    Steve Whitehouse:  Split into dn_nsp_in.c and dn_nsp_out.c from
+ *                       original dn_nsp.c.
+ *    Steve Whitehouse:  Updated to work with my new routing architecture.
+ *    Steve Whitehouse:  Added changes from Eduardo Serrat's patches.
+ *    Steve Whitehouse:  Now conninits have the "return" bit set.
+ *    Steve Whitehouse:  Fixes to check alloc'd skbs are non NULL!
+ *                       Moved output state machine into one function
+ *    Steve Whitehouse:  New output state machine
+ *         Paul Koning:  Connect Confirm message fix.
+ *      Eduardo Serrat:  Fix to stop dn_nsp_do_disc() sending malformed packets.
+ *    Steve Whitehouse:  dn_nsp_output() and friends needed a spring clean
+ *    Steve Whitehouse:  Moved dn_nsp_send() in here from route.h
+ */
+
+/******************************************************************************
+    (c) 1995-1998 E.M. Serrat           emserrat@geocities.com
+    
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+*******************************************************************************/
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/inet.h>
+#include <linux/route.h>
+#include <net/sock.h>
+#include <asm/system.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/termios.h>      
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/if_packet.h>
+#include <net/neighbour.h>
+#include <net/dst.h>
+#include <net/flow.h>
+#include <net/dn.h>
+#include <net/dn_nsp.h>
+#include <net/dn_dev.h>
+#include <net/dn_route.h>
+
+
+static int nsp_backoff[NSP_MAXRXTSHIFT + 1] = { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 };
+
+static void dn_nsp_send(struct sk_buff *skb)
+{
+        struct sock *sk = skb->sk;
+        struct dn_scp *scp = DN_SK(sk);
+        struct dst_entry *dst;
+        struct flowi fl;
+
+        skb->h.raw = skb->data;
+        scp->stamp = jiffies;
+
+        dst = sk_dst_check(sk, 0);
+        if (dst) {
+try_again:
+                skb->dst = dst;
+                dst_output(skb);
+                return;
+        }
+
+        memset(&fl, 0, sizeof(fl));
+        fl.oif = sk->sk_bound_dev_if;
+        fl.fld_src = dn_saddr2dn(&scp->addr);
+        fl.fld_dst = dn_saddr2dn(&scp->peer);
+        dn_sk_ports_copy(&fl, scp);
+        fl.proto = DNPROTO_NSP;
+        if (dn_route_output_sock(&sk->sk_dst_cache, &fl, sk, 0) == 0) {
+                dst = sk_dst_get(sk);
+                sk->sk_route_caps = dst->dev->features;
+                goto try_again;
+        }
+
+        sk->sk_err = EHOSTUNREACH;
+        if (!sock_flag(sk, SOCK_DEAD))
+                sk->sk_state_change(sk);
+}
+
+
+/*
+ * If sk == NULL, then we assume that we are supposed to be making
+ * a routing layer skb. If sk != NULL, then we are supposed to be
+ * creating an skb for the NSP layer.
+ *
+ * The eventual aim is for each socket to have a cached header size
+ * for its outgoing packets, and to set hdr from this when sk != NULL.
+ */
+struct sk_buff *dn_alloc_skb(struct sock *sk, int size, int pri)
+{
+        struct sk_buff *skb;
+        int hdr = 64;
+
+        if ((skb = alloc_skb(size + hdr, pri)) == NULL)
+                return NULL;
+
+        skb->protocol = __constant_htons(ETH_P_DNA_RT);
+        skb->pkt_type = PACKET_OUTGOING;
+
+        if (sk)
+                skb_set_owner_w(skb, sk);
+
+        skb_reserve(skb, hdr);
+
+        return skb;
+}
+
+/*
+ * Wrapper for the above, for allocs of data skbs. We try and get the
+ * whole size thats been asked for (plus 11 bytes of header). If this
+ * fails, then we try for any size over 16 bytes for SOCK_STREAMS.
+ */
+struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock, long timeo, int *err)
+{
+        int space;
+        int len;
+        struct sk_buff *skb = NULL;
+
+        *err = 0;
+
+        while(skb == NULL) {
+                if (signal_pending(current)) {
+                        *err = sock_intr_errno(timeo);
+                        break;
+                }
+
+                if (sk->sk_shutdown & SEND_SHUTDOWN) {
+                        *err = EINVAL;
+                        break;
+                }
+
+                if (sk->sk_err)
+                        break;
+
+                len = *size + 11;
+                space = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
+
+                if (space < len) {
+                        if ((sk->sk_socket->type == SOCK_STREAM) &&
+                            (space >= (16 + 11)))
+                                len = space;
+                }
+
+                if (space < len) {
+                        set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
+                        if (noblock) {
+                                *err = EWOULDBLOCK;
+                                break;
+                        }
+
+                        clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
+                        SOCK_SLEEP_PRE(sk)
+
+                        if ((sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc)) <
+                            len)
+                                schedule();
+
+                        SOCK_SLEEP_POST(sk)
+                        continue;
+                }
+
+                if ((skb = dn_alloc_skb(sk, len, sk->sk_allocation)) == NULL)
+                        continue;
+
+                *size = len - 11;
+        }
+
+        return skb;
+}
+
+/*
+ * Calculate persist timer based upon the smoothed round
+ * trip time and the variance. Backoff according to the
+ * nsp_backoff[] array.
+ */
+unsigned long dn_nsp_persist(struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+
+        unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
+
+        t *= nsp_backoff[scp->nsp_rxtshift];
+
+        if (t < HZ) t = HZ;
+        if (t > (600*HZ)) t = (600*HZ);
+
+        if (scp->nsp_rxtshift < NSP_MAXRXTSHIFT)
+                scp->nsp_rxtshift++;
+
+        /* printk(KERN_DEBUG "rxtshift %lu, t=%lu\n", scp->nsp_rxtshift, t); */
+
+        return t;
+}
+
+/*
+ * This is called each time we get an estimate for the rtt
+ * on the link.
+ */
+static void dn_nsp_rtt(struct sock *sk, long rtt)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        long srtt = (long)scp->nsp_srtt;
+        long rttvar = (long)scp->nsp_rttvar;
+        long delta;
+
+        /*
+         * If the jiffies clock flips over in the middle of timestamp
+         * gathering this value might turn out negative, so we make sure
+         * that is it always positive here.
+         */
+        if (rtt < 0) 
+                rtt = -rtt;
+        /*
+         * Add new rtt to smoothed average
+         */
+        delta = ((rtt << 3) - srtt);
+        srtt += (delta >> 3);
+        if (srtt >= 1) 
+                scp->nsp_srtt = (unsigned long)srtt;
+        else
+                scp->nsp_srtt = 1;
+
+        /*
+         * Add new rtt varience to smoothed varience
+         */
+        delta >>= 1;
+        rttvar += ((((delta>0)?(delta):(-delta)) - rttvar) >> 2);
+        if (rttvar >= 1) 
+                scp->nsp_rttvar = (unsigned long)rttvar;
+        else
+                scp->nsp_rttvar = 1;
+
+        /* printk(KERN_DEBUG "srtt=%lu rttvar=%lu\n", scp->nsp_srtt, scp->nsp_rttvar); */
+}
+
+/**
+ * dn_nsp_clone_and_send - Send a data packet by cloning it
+ * @skb: The packet to clone and transmit
+ * @gfp: memory allocation flag
+ *
+ * Clone a queued data or other data packet and transmit it.
+ *
+ * Returns: The number of times the packet has been sent previously
+ */
+static inline unsigned dn_nsp_clone_and_send(struct sk_buff *skb, int gfp)
+{
+        struct dn_skb_cb *cb = DN_SKB_CB(skb);
+        struct sk_buff *skb2;
+        int ret = 0;
+
+        if ((skb2 = skb_clone(skb, gfp)) != NULL) {
+                ret = cb->xmit_count;
+                cb->xmit_count++;
+                cb->stamp = jiffies;
+                skb2->sk = skb->sk;
+                dn_nsp_send(skb2);
+        }
+
+        return ret;
+}
+
+/**
+ * dn_nsp_output - Try and send something from socket queues
+ * @sk: The socket whose queues are to be investigated
+ * @gfp: The memory allocation flags
+ *
+ * Try and send the packet on the end of the data and other data queues.
+ * Other data gets priority over data, and if we retransmit a packet we
+ * reduce the window by dividing it in two.
+ *
+ */
+void dn_nsp_output(struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct sk_buff *skb;
+        unsigned reduce_win = 0;
+
+        /*
+         * First we check for otherdata/linkservice messages
+         */
+        if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL)
+                reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
+
+        /*
+         * If we may not send any data, we don't.
+         * If we are still trying to get some other data down the
+         * channel, we don't try and send any data.
+         */
+        if (reduce_win || (scp->flowrem_sw != DN_SEND))
+                goto recalc_window;
+
+        if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL)
+                reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
+
+        /*
+         * If we've sent any frame more than once, we cut the
+         * send window size in half. There is always a minimum
+         * window size of one available.
+         */
+recalc_window:
+        if (reduce_win) {
+                scp->snd_window >>= 1;
+                if (scp->snd_window < NSP_MIN_WINDOW)
+                        scp->snd_window = NSP_MIN_WINDOW;
+        }
+}
+
+int dn_nsp_xmit_timeout(struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+
+        dn_nsp_output(sk);
+
+        if (skb_queue_len(&scp->data_xmit_queue) || skb_queue_len(&scp->other_xmit_queue))
+                scp->persist = dn_nsp_persist(sk);
+
+        return 0;
+}
+
+static inline unsigned char *dn_mk_common_header(struct dn_scp *scp, struct sk_buff *skb, unsigned char msgflag, int len)
+{
+        unsigned char *ptr = skb_push(skb, len);
+
+        BUG_ON(len < 5);
+
+        *ptr++ = msgflag;
+        *((unsigned short *)ptr) = scp->addrrem;
+        ptr += 2;
+        *((unsigned short *)ptr) = scp->addrloc;
+        ptr += 2;
+        return ptr;
+}
+
+static unsigned short *dn_mk_ack_header(struct sock *sk, struct sk_buff *skb, unsigned char msgflag, int hlen, int other)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        unsigned short acknum = scp->numdat_rcv & 0x0FFF;
+        unsigned short ackcrs = scp->numoth_rcv & 0x0FFF;
+        unsigned short *ptr;
+
+        BUG_ON(hlen < 9);
+
+        scp->ackxmt_dat = acknum;
+        scp->ackxmt_oth = ackcrs;
+        acknum |= 0x8000;
+        ackcrs |= 0x8000;
+
+        /* If this is an "other data/ack" message, swap acknum and ackcrs */
+        if (other) {
+                unsigned short tmp = acknum;
+                acknum = ackcrs;
+                ackcrs = tmp;
+        }
+
+        /* Set "cross subchannel" bit in ackcrs */
+        ackcrs |= 0x2000;
+
+        ptr = (unsigned short *)dn_mk_common_header(scp, skb, msgflag, hlen);
+
+        *ptr++ = dn_htons(acknum);
+        *ptr++ = dn_htons(ackcrs);
+
+        return ptr;
+}
+
+static unsigned short *dn_nsp_mk_data_header(struct sock *sk, struct sk_buff *skb, int oth)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct dn_skb_cb *cb = DN_SKB_CB(skb);
+        unsigned short *ptr = dn_mk_ack_header(sk, skb, cb->nsp_flags, 11, oth);
+
+        if (unlikely(oth)) {
+                cb->segnum = scp->numoth;
+                seq_add(&scp->numoth, 1);
+        } else {
+                cb->segnum = scp->numdat;
+                seq_add(&scp->numdat, 1);
+        }
+        *(ptr++) = dn_htons(cb->segnum);
+
+        return ptr;
+}
+
+void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, int gfp, int oth)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct dn_skb_cb *cb = DN_SKB_CB(skb);
+        unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
+
+        cb->xmit_count = 0;
+        dn_nsp_mk_data_header(sk, skb, oth);
+
+        /*
+         * Slow start: If we have been idle for more than
+         * one RTT, then reset window to min size.
+         */
+        if ((jiffies - scp->stamp) > t)
+                scp->snd_window = NSP_MIN_WINDOW;
+
+        if (oth)
+                skb_queue_tail(&scp->other_xmit_queue, skb);
+        else
+                skb_queue_tail(&scp->data_xmit_queue, skb);
+
+        if (scp->flowrem_sw != DN_SEND)
+                return;
+
+        dn_nsp_clone_and_send(skb, gfp);
+}
+
+
+int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum)
+{
+        struct dn_skb_cb *cb = DN_SKB_CB(skb);
+        struct dn_scp *scp = DN_SK(sk);
+        struct sk_buff *skb2, *list, *ack = NULL;
+        int wakeup = 0;
+        int try_retrans = 0;
+        unsigned long reftime = cb->stamp;
+        unsigned long pkttime;
+        unsigned short xmit_count;
+        unsigned short segnum;
+
+        skb2 = q->next;
+        list = (struct sk_buff *)q;
+        while(list != skb2) {
+                struct dn_skb_cb *cb2 = DN_SKB_CB(skb2);
+
+                if (dn_before_or_equal(cb2->segnum, acknum))
+                        ack = skb2;
+
+                /* printk(KERN_DEBUG "ack: %s %04x %04x\n", ack ? "ACK" : "SKIP", (int)cb2->segnum, (int)acknum); */
+
+                skb2 = skb2->next;
+
+                if (ack == NULL)
+                        continue;
+
+                /* printk(KERN_DEBUG "check_xmit_queue: %04x, %d\n", acknum, cb2->xmit_count); */
+
+                /* Does _last_ packet acked have xmit_count > 1 */
+                try_retrans = 0;
+                /* Remember to wake up the sending process */
+                wakeup = 1;
+                /* Keep various statistics */
+                pkttime = cb2->stamp;
+                xmit_count = cb2->xmit_count;
+                segnum = cb2->segnum;
+                /* Remove and drop ack'ed packet */
+                skb_unlink(ack);
+                kfree_skb(ack);
+                ack = NULL;
+
+                /*
+                 * We don't expect to see acknowledgements for packets we
+                 * haven't sent yet.
+                 */
+                WARN_ON(xmit_count == 0);
+
+                /*
+                 * If the packet has only been sent once, we can use it
+                 * to calculate the RTT and also open the window a little
+                 * further.
+                 */
+                if (xmit_count == 1) {
+                        if (dn_equal(segnum, acknum)) 
+                                dn_nsp_rtt(sk, (long)(pkttime - reftime));
+
+                        if (scp->snd_window < scp->max_window)
+                                scp->snd_window++;
+                }
+
+                /*
+                 * Packet has been sent more than once. If this is the last
+                 * packet to be acknowledged then we want to send the next
+                 * packet in the send queue again (assumes the remote host does
+                 * go-back-N error control).
+                 */
+                if (xmit_count > 1)
+                        try_retrans = 1;
+        }
+
+        if (try_retrans)
+                dn_nsp_output(sk);
+
+        return wakeup;
+}
+
+void dn_nsp_send_data_ack(struct sock *sk)
+{
+        struct sk_buff *skb = NULL;
+
+        if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
+                return;
+
+        skb_reserve(skb, 9);
+        dn_mk_ack_header(sk, skb, 0x04, 9, 0);
+        dn_nsp_send(skb);
+}
+
+void dn_nsp_send_oth_ack(struct sock *sk)
+{
+        struct sk_buff *skb = NULL;
+
+        if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
+                return;
+
+        skb_reserve(skb, 9);
+        dn_mk_ack_header(sk, skb, 0x14, 9, 1);
+        dn_nsp_send(skb);
+}
+
+
+void dn_send_conn_ack (struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct sk_buff *skb = NULL;
+        struct nsp_conn_ack_msg *msg;
+
+        if ((skb = dn_alloc_skb(sk, 3, sk->sk_allocation)) == NULL)
+                return;
+
+        msg = (struct nsp_conn_ack_msg *)skb_put(skb, 3);
+        msg->msgflg = 0x24;                   
+        msg->dstaddr = scp->addrrem;
+
+        dn_nsp_send(skb);       
+}
+
+void dn_nsp_delayed_ack(struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+
+        if (scp->ackxmt_oth != scp->numoth_rcv)
+                dn_nsp_send_oth_ack(sk);
+
+        if (scp->ackxmt_dat != scp->numdat_rcv)
+                dn_nsp_send_data_ack(sk);
+}
+
+static int dn_nsp_retrans_conn_conf(struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+
+        if (scp->state == DN_CC)
+                dn_send_conn_conf(sk, GFP_ATOMIC);
+
+        return 0;
+}
+
+void dn_send_conn_conf(struct sock *sk, int gfp)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct sk_buff *skb = NULL;
+        struct nsp_conn_init_msg *msg;
+        unsigned char len = scp->conndata_out.opt_optl;
+
+        if ((skb = dn_alloc_skb(sk, 50 + scp->conndata_out.opt_optl, gfp)) == NULL)
+                return;
+
+        msg = (struct nsp_conn_init_msg *)skb_put(skb, sizeof(*msg));
+        msg->msgflg = 0x28;                   
+        msg->dstaddr = scp->addrrem;
+        msg->srcaddr = scp->addrloc;
+        msg->services = scp->services_loc;
+        msg->info = scp->info_loc;
+        msg->segsize = dn_htons(scp->segsize_loc);
+
+        *skb_put(skb,1) = len;
+
+        if (len > 0) 
+                memcpy(skb_put(skb, len), scp->conndata_out.opt_data, len);
+        
+
+        dn_nsp_send(skb);
+
+        scp->persist = dn_nsp_persist(sk);
+        scp->persist_fxn = dn_nsp_retrans_conn_conf;
+}
+
+
+static __inline__ void dn_nsp_do_disc(struct sock *sk, unsigned char msgflg, 
+                        unsigned short reason, int gfp, struct dst_entry *dst,
+                        int ddl, unsigned char *dd, __u16 rem, __u16 loc)
+{
+        struct sk_buff *skb = NULL;
+        int size = 7 + ddl + ((msgflg == NSP_DISCINIT) ? 1 : 0);
+        unsigned char *msg;
+
+        if ((dst == NULL) || (rem == 0)) {
+                if (net_ratelimit())
+                        printk(KERN_DEBUG "DECnet: dn_nsp_do_disc: BUG! Please report this to SteveW@ACM.org rem=%u dst=%p\n", (unsigned)rem, dst);
+                return;
+        }
+
+        if ((skb = dn_alloc_skb(sk, size, gfp)) == NULL)
+                return;
+
+        msg = skb_put(skb, size);
+        *msg++ = msgflg;
+        *(__u16 *)msg = rem;
+        msg += 2;
+        *(__u16 *)msg = loc;
+        msg += 2;
+        *(__u16 *)msg = dn_htons(reason);
+        msg += 2;
+        if (msgflg == NSP_DISCINIT)
+                *msg++ = ddl;
+
+        if (ddl) {
+                memcpy(msg, dd, ddl);
+        }
+
+        /*
+         * This doesn't go via the dn_nsp_send() function since we need
+         * to be able to send disc packets out which have no socket
+         * associations.
+         */
+        skb->dst = dst_clone(dst);
+        dst_output(skb);
+}
+
+
+void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg, 
+                        unsigned short reason, int gfp)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        int ddl = 0;
+
+        if (msgflg == NSP_DISCINIT)
+                ddl = scp->discdata_out.opt_optl;
+
+        if (reason == 0)
+                reason = scp->discdata_out.opt_status;
+
+        dn_nsp_do_disc(sk, msgflg, reason, gfp, sk->sk_dst_cache, ddl, 
+                scp->discdata_out.opt_data, scp->addrrem, scp->addrloc);
+}
+
+
+void dn_nsp_return_disc(struct sk_buff *skb, unsigned char msgflg, 
+                        unsigned short reason)
+{
+        struct dn_skb_cb *cb = DN_SKB_CB(skb);
+        int ddl = 0;
+        int gfp = GFP_ATOMIC;
+
+        dn_nsp_do_disc(NULL, msgflg, reason, gfp, skb->dst, ddl, 
+                        NULL, cb->src_port, cb->dst_port);
+}
+
+
+void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct sk_buff *skb;
+        unsigned char *ptr;
+        int gfp = GFP_ATOMIC;
+
+        if ((skb = dn_alloc_skb(sk, DN_MAX_NSP_DATA_HEADER + 2, gfp)) == NULL)
+                return;
+
+        skb_reserve(skb, DN_MAX_NSP_DATA_HEADER);
+        ptr = skb_put(skb, 2);
+        DN_SKB_CB(skb)->nsp_flags = 0x10;
+        *ptr++ = lsflags;
+        *ptr = fcval;
+
+        dn_nsp_queue_xmit(sk, skb, gfp, 1);
+
+        scp->persist = dn_nsp_persist(sk);
+        scp->persist_fxn = dn_nsp_xmit_timeout;
+}
+
+static int dn_nsp_retrans_conninit(struct sock *sk)
+{
+        struct dn_scp *scp = DN_SK(sk);
+
+        if (scp->state == DN_CI)
+                dn_nsp_send_conninit(sk, NSP_RCI);
+
+        return 0;
+}
+
+void dn_nsp_send_conninit(struct sock *sk, unsigned char msgflg)
+{
+        struct dn_scp *scp = DN_SK(sk);
+        struct nsp_conn_init_msg *msg;
+        unsigned char aux;
+        unsigned char menuver;
+        struct dn_skb_cb *cb;
+        unsigned char type = 1;
+        int allocation = (msgflg == NSP_CI) ? sk->sk_allocation : GFP_ATOMIC;
+        struct sk_buff *skb = dn_alloc_skb(sk, 200, allocation);
+
+        if (!skb)
+                return;
+
+        cb  = DN_SKB_CB(skb);
+        msg = (struct nsp_conn_init_msg *)skb_put(skb,sizeof(*msg));
+
+        msg->msgflg     = msgflg;
+        msg->dstaddr    = 0x0000;               /* Remote Node will assign it*/
+
+        msg->srcaddr    = scp->addrloc;
+        msg->services   = scp->services_loc;    /* Requested flow control    */
+        msg->info       = scp->info_loc;        /* Version Number            */ 
+        msg->segsize    = dn_htons(scp->segsize_loc);   /* Max segment size  */ 
+
+        if (scp->peer.sdn_objnum)
+                type = 0;
+
+        skb_put(skb, dn_sockaddr2username(&scp->peer, skb->tail, type));
+        skb_put(skb, dn_sockaddr2username(&scp->addr, skb->tail, 2));
+
+        menuver = DN_MENUVER_ACC | DN_MENUVER_USR;
+        if (scp->peer.sdn_flags & SDF_PROXY)
+                menuver |= DN_MENUVER_PRX;
+        if (scp->peer.sdn_flags & SDF_UICPROXY)
+                menuver |= DN_MENUVER_UIC;
+
+        *skb_put(skb, 1) = menuver;     /* Menu Version         */
+        
+        aux = scp->accessdata.acc_userl;
+        *skb_put(skb, 1) = aux;
+        if (aux > 0)
+        memcpy(skb_put(skb, aux), scp->accessdata.acc_user, aux);
+
+        aux = scp->accessdata.acc_passl;
+        *skb_put(skb, 1) = aux;
+        if (aux > 0)
+        memcpy(skb_put(skb, aux), scp->accessdata.acc_pass, aux);
+
+        aux = scp->accessdata.acc_accl;
+        *skb_put(skb, 1) = aux;
+        if (aux > 0)
+        memcpy(skb_put(skb, aux), scp->accessdata.acc_acc, aux);
+
+        aux = scp->conndata_out.opt_optl;
+        *skb_put(skb, 1) = aux;
+        if (aux > 0)
+        memcpy(skb_put(skb,aux), scp->conndata_out.opt_data, aux);
+
+        scp->persist = dn_nsp_persist(sk);
+        scp->persist_fxn = dn_nsp_retrans_conninit;
+
+        cb->rt_flags = DN_RT_F_RQR;
+
+        dn_nsp_send(skb);       
+}
+