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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [rose/] [rose_subr.c] - Blame information for rev 1765

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/*
 *      ROSE release 003
 *
 *      This code REQUIRES 2.1.15 or higher/ NET3.038
 *
 *      This module:
 *              This module 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 (at your option) any later version.
 *
 *      History
 *      ROSE 001        Jonathan(G4KLX) Cloned from nr_subr.c
 *      ROSE 002        Jonathan(G4KLX) Centralised disconnect processing.
 *      ROSE 003        Jonathan(G4KLX) Added use count to neighbours.
 */
 
#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 <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
 
/*
 *      This routine purges all of the queues of frames.
 */
void rose_clear_queues(struct sock *sk)
{
        skb_queue_purge(&sk->write_queue);
        skb_queue_purge(&sk->protinfo.rose->ack_queue);
}
 
/*
 * This routine purges the input queue of those frames that have been
 * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
 * SDL diagram.
 */
void rose_frames_acked(struct sock *sk, unsigned short nr)
{
        struct sk_buff *skb;
 
        /*
         * Remove all the ack-ed frames from the ack queue.
         */
        if (sk->protinfo.rose->va != nr) {
                while (skb_peek(&sk->protinfo.rose->ack_queue) != NULL && sk->protinfo.rose->va != nr) {
                        skb = skb_dequeue(&sk->protinfo.rose->ack_queue);
                        kfree_skb(skb);
                        sk->protinfo.rose->va = (sk->protinfo.rose->va + 1) % ROSE_MODULUS;
                }
        }
}
 
void rose_requeue_frames(struct sock *sk)
{
        struct sk_buff *skb, *skb_prev = NULL;
 
        /*
         * Requeue all the un-ack-ed frames on the output queue to be picked
         * up by rose_kick. This arrangement handles the possibility of an
         * empty output queue.
         */
        while ((skb = skb_dequeue(&sk->protinfo.rose->ack_queue)) != NULL) {
                if (skb_prev == NULL)
                        skb_queue_head(&sk->write_queue, skb);
                else
                        skb_append(skb_prev, skb);
                skb_prev = skb;
        }
}
 
/*
 *      Validate that the value of nr is between va and vs. Return true or
 *      false for testing.
 */
int rose_validate_nr(struct sock *sk, unsigned short nr)
{
        unsigned short vc = sk->protinfo.rose->va;
 
        while (vc != sk->protinfo.rose->vs) {
                if (nr == vc) return 1;
                vc = (vc + 1) % ROSE_MODULUS;
        }
 
        if (nr == sk->protinfo.rose->vs) return 1;
 
        return 0;
}
 
/*
 *  This routine is called when the packet layer internally generates a
 *  control frame.
 */
void rose_write_internal(struct sock *sk, int frametype)
{
        struct sk_buff *skb;
        unsigned char  *dptr;
        unsigned char  lci1, lci2;
        char buffer[100];
        int len, faclen = 0;
        int ax25_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1;
 
        len = ax25_header_len + ROSE_MIN_LEN;
 
        switch (frametype) {
                case ROSE_CALL_REQUEST:
                        len   += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
                        faclen = rose_create_facilities(buffer, sk->protinfo.rose);
                        len   += faclen;
                        break;
                case ROSE_CALL_ACCEPTED:
                case ROSE_RESET_REQUEST:
                        len   += 2;
                        break;
                case ROSE_CLEAR_REQUEST:
                        len   += 3;
                        /* facilities */
                        faclen = 3 + 2 + AX25_ADDR_LEN + 3 + ROSE_ADDR_LEN;
                        dptr = buffer;
                        *dptr++ = faclen-1;     /* Facilities length */
                        *dptr++ = 0;
                        *dptr++ = FAC_NATIONAL;
                        *dptr++ = FAC_NATIONAL_FAIL_CALL;
                        *dptr++ = AX25_ADDR_LEN;
                        memcpy(dptr, &rose_callsign, AX25_ADDR_LEN);
                        dptr += AX25_ADDR_LEN;
                        *dptr++ = FAC_NATIONAL_FAIL_ADD;
                        *dptr++ = ROSE_ADDR_LEN + 1;
                        *dptr++ = ROSE_ADDR_LEN * 2;
                        memcpy(dptr, &sk->protinfo.rose->source_addr, ROSE_ADDR_LEN);
                        len   += faclen;
                        break;
        }
 
        if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
                return;
 
        /*
         *      Space for AX.25 header and PID.
         */
        skb_reserve(skb, ax25_header_len);
 
        dptr = skb_put(skb, len - ax25_header_len);
 
        lci1 = (sk->protinfo.rose->lci >> 8) & 0x0F;
        lci2 = (sk->protinfo.rose->lci >> 0) & 0xFF;
 
        switch (frametype) {
 
                case ROSE_CALL_REQUEST:
                        *dptr++ = ROSE_GFI | lci1;
                        *dptr++ = lci2;
                        *dptr++ = frametype;
                        *dptr++ = 0xAA;
                        memcpy(dptr, &sk->protinfo.rose->dest_addr,  ROSE_ADDR_LEN);
                        dptr   += ROSE_ADDR_LEN;
                        memcpy(dptr, &sk->protinfo.rose->source_addr, ROSE_ADDR_LEN);
                        dptr   += ROSE_ADDR_LEN;
                        memcpy(dptr, buffer, faclen);
                        dptr   += faclen;
                        break;
 
                case ROSE_CALL_ACCEPTED:
                        *dptr++ = ROSE_GFI | lci1;
                        *dptr++ = lci2;
                        *dptr++ = frametype;
                        *dptr++ = 0x00;         /* Address length */
                        *dptr++ = 0;             /* Facilities length */
                        break;
 
                case ROSE_CLEAR_REQUEST:
                        *dptr++ = ROSE_GFI | lci1;
                        *dptr++ = lci2;
                        *dptr++ = frametype;
                        *dptr++ = sk->protinfo.rose->cause;
                        *dptr++ = sk->protinfo.rose->diagnostic;
                        *dptr++ = 0x00;         /* Address length */
                        memcpy(dptr, buffer, faclen);
                        dptr   += faclen;
                        break;
 
                case ROSE_RESET_REQUEST:
                        *dptr++ = ROSE_GFI | lci1;
                        *dptr++ = lci2;
                        *dptr++ = frametype;
                        *dptr++ = ROSE_DTE_ORIGINATED;
                        *dptr++ = 0;
                        break;
 
                case ROSE_RR:
                case ROSE_RNR:
                        *dptr++ = ROSE_GFI | lci1;
                        *dptr++ = lci2;
                        *dptr   = frametype;
                        *dptr++ |= (sk->protinfo.rose->vr << 5) & 0xE0;
                        break;
 
                case ROSE_CLEAR_CONFIRMATION:
                case ROSE_RESET_CONFIRMATION:
                        *dptr++ = ROSE_GFI | lci1;
                        *dptr++ = lci2;
                        *dptr++  = frametype;
                        break;
 
                default:
                        printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);
                        kfree_skb(skb);
                        return;
        }
 
        rose_transmit_link(skb, sk->protinfo.rose->neighbour);
}
 
int rose_decode(struct sk_buff *skb, int *ns, int *nr, int *q, int *d, int *m)
{
        unsigned char *frame;
 
        frame = skb->data;
 
        *ns = *nr = *q = *d = *m = 0;
 
        switch (frame[2]) {
                case ROSE_CALL_REQUEST:
                case ROSE_CALL_ACCEPTED:
                case ROSE_CLEAR_REQUEST:
                case ROSE_CLEAR_CONFIRMATION:
                case ROSE_RESET_REQUEST:
                case ROSE_RESET_CONFIRMATION:
                        return frame[2];
                default:
                        break;
        }
 
        if ((frame[2] & 0x1F) == ROSE_RR  ||
            (frame[2] & 0x1F) == ROSE_RNR) {
                *nr = (frame[2] >> 5) & 0x07;
                return frame[2] & 0x1F;
        }
 
        if ((frame[2] & 0x01) == ROSE_DATA) {
                *q  = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
                *d  = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;
                *m  = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;
                *nr = (frame[2] >> 5) & 0x07;
                *ns = (frame[2] >> 1) & 0x07;
                return ROSE_DATA;
        }
 
        return ROSE_ILLEGAL;
}
 
static int rose_parse_national(unsigned char *p, struct rose_facilities_struct *facilities, int len)
{
        unsigned char *pt;
        unsigned char l, lg, n = 0;
        int fac_national_digis_received = 0;
 
        do {
                switch (*p & 0xC0) {
                        case 0x00:
                                p   += 2;
                                n   += 2;
                                len -= 2;
                                break;
 
                        case 0x40:
                                if (*p == FAC_NATIONAL_RAND)
                                        facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);
                                p   += 3;
                                n   += 3;
                                len -= 3;
                                break;
 
                        case 0x80:
                                p   += 4;
                                n   += 4;
                                len -= 4;
                                break;
 
                        case 0xC0:
                                l = p[1];
                                if (*p == FAC_NATIONAL_DEST_DIGI) {
                                        if (!fac_national_digis_received) {
                                                memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);
                                                facilities->source_ndigis = 1;
                                        }
                                }
                                else if (*p == FAC_NATIONAL_SRC_DIGI) {
                                        if (!fac_national_digis_received) {
                                                memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);
                                                facilities->dest_ndigis = 1;
                                        }
                                }
                                else if (*p == FAC_NATIONAL_FAIL_CALL) {
                                        memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);
                                }
                                else if (*p == FAC_NATIONAL_FAIL_ADD) {
                                        memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);
                                }
                                else if (*p == FAC_NATIONAL_DIGIS) {
                                        fac_national_digis_received = 1;
                                        facilities->source_ndigis = 0;
                                        facilities->dest_ndigis   = 0;
                                        for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {
                                                if (pt[6] & AX25_HBIT)
                                                        memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);
                                                else
                                                        memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);
                                        }
                                }
                                p   += l + 2;
                                n   += l + 2;
                                len -= l + 2;
                                break;
                }
        } while (*p != 0x00 && len > 0);
 
        return n;
}
 
static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *facilities, int len)
{
        unsigned char l, n = 0;
        char callsign[11];
 
        do {
                switch (*p & 0xC0) {
                        case 0x00:
                                p   += 2;
                                n   += 2;
                                len -= 2;
                                break;
 
                        case 0x40:
                                p   += 3;
                                n   += 3;
                                len -= 3;
                                break;
 
                        case 0x80:
                                p   += 4;
                                n   += 4;
                                len -= 4;
                                break;
 
                        case 0xC0:
                                l = p[1];
                                if (*p == FAC_CCITT_DEST_NSAP) {
                                        memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);
                                        memcpy(callsign, p + 12,   l - 10);
                                        callsign[l - 10] = '\0';
                                        facilities->source_call = *asc2ax(callsign);
                                }
                                if (*p == FAC_CCITT_SRC_NSAP) {
                                        memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);
                                        memcpy(callsign, p + 12, l - 10);
                                        callsign[l - 10] = '\0';
                                        facilities->dest_call = *asc2ax(callsign);
                                }
                                p   += l + 2;
                                n   += l + 2;
                                len -= l + 2;
                                break;
                }
        } while (*p != 0x00 && len > 0);
 
        return n;
}
 
int rose_parse_facilities(unsigned char *p, struct rose_facilities_struct *facilities)
{
        int facilities_len, len;
 
        facilities_len = *p++;
 
        if (facilities_len == 0)
                return 0;
 
        while (facilities_len > 0) {
                if (*p == 0x00) {
                        facilities_len--;
                        p++;
 
                        switch (*p) {
                                case FAC_NATIONAL:              /* National */
                                        len = rose_parse_national(p + 1, facilities, facilities_len - 1);
                                        facilities_len -= len + 1;
                                        p += len + 1;
                                        break;
 
                                case FAC_CCITT:         /* CCITT */
                                        len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);
                                        facilities_len -= len + 1;
                                        p += len + 1;
                                        break;
 
                                default:
                                        printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);
                                        facilities_len--;
                                        p++;
                                        break;
                        }
                }
                else break;     /* Error in facilities format */
        }
 
        return 1;
}
 
int rose_create_facilities(unsigned char *buffer, rose_cb *rose)
{
        unsigned char *p = buffer + 1;
        char *callsign;
        int len, nb;
 
        /* National Facilities */
        if (rose->rand != 0 || rose->source_ndigis == 1 || rose->dest_ndigis == 1) {
                *p++ = 0x00;
                *p++ = FAC_NATIONAL;
 
                if (rose->rand != 0) {
                        *p++ = FAC_NATIONAL_RAND;
                        *p++ = (rose->rand >> 8) & 0xFF;
                        *p++ = (rose->rand >> 0) & 0xFF;
                }
 
                /* Sent before older facilities */
                if ((rose->source_ndigis > 0) || (rose->dest_ndigis > 0)) {
                        int maxdigi = 0;
                        *p++ = FAC_NATIONAL_DIGIS;
                        *p++ = AX25_ADDR_LEN * (rose->source_ndigis + rose->dest_ndigis);
                        for (nb = 0 ; nb < rose->source_ndigis ; nb++) {
                                if (++maxdigi >= ROSE_MAX_DIGIS)
                                        break;
                                memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);
                                p[6] |= AX25_HBIT;
                                p += AX25_ADDR_LEN;
                        }
                        for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {
                                if (++maxdigi >= ROSE_MAX_DIGIS)
                                        break;
                                memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);
                                p[6] &= ~AX25_HBIT;
                                p += AX25_ADDR_LEN;
                        }
                }
 
                /* For compatibility */
                if (rose->source_ndigis > 0) {
                        *p++ = FAC_NATIONAL_SRC_DIGI;
                        *p++ = AX25_ADDR_LEN;
                        memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);
                        p   += AX25_ADDR_LEN;
                }
 
                /* For compatibility */
                if (rose->dest_ndigis > 0) {
                        *p++ = FAC_NATIONAL_DEST_DIGI;
                        *p++ = AX25_ADDR_LEN;
                        memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);
                        p   += AX25_ADDR_LEN;
                }
        }
 
        *p++ = 0x00;
        *p++ = FAC_CCITT;
 
        *p++ = FAC_CCITT_DEST_NSAP;
 
        callsign = ax2asc(&rose->dest_call);
 
        *p++ = strlen(callsign) + 10;
        *p++ = (strlen(callsign) + 9) * 2;              /* ??? */
 
        *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
        *p++ = ROSE_ADDR_LEN * 2;
        memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);
        p   += ROSE_ADDR_LEN;
 
        memcpy(p, callsign, strlen(callsign));
        p   += strlen(callsign);
 
        *p++ = FAC_CCITT_SRC_NSAP;
 
        callsign = ax2asc(&rose->source_call);
 
        *p++ = strlen(callsign) + 10;
        *p++ = (strlen(callsign) + 9) * 2;              /* ??? */
 
        *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
        *p++ = ROSE_ADDR_LEN * 2;
        memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);
        p   += ROSE_ADDR_LEN;
 
        memcpy(p, callsign, strlen(callsign));
        p   += strlen(callsign);
 
        len       = p - buffer;
        buffer[0] = len - 1;
 
        return len;
}
 
void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)
{
        rose_stop_timer(sk);
        rose_stop_idletimer(sk);
 
        rose_clear_queues(sk);
 
        sk->protinfo.rose->lci   = 0;
        sk->protinfo.rose->state = ROSE_STATE_0;
 
        if (cause != -1)
                sk->protinfo.rose->cause = cause;
 
        if (diagnostic != -1)
                sk->protinfo.rose->diagnostic = diagnostic;
 
        sk->state     = TCP_CLOSE;
        sk->err       = reason;
        sk->shutdown |= SEND_SHUTDOWN;
 
        if (!sk->dead)
                sk->state_change(sk);
 
        sk->dead  = 1;
}

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [rose/] [rose_subr.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* ROSE release 003`
3			`*`
4			`* This code REQUIRES 2.1.15 or higher/ NET3.038`
5			`*`
6			`* This module:`
7			`* This module is free software; you can redistribute it and/or`
8			`* modify it under the terms of the GNU General Public License`
9			`* as published by the Free Software Foundation; either version`
10			`* 2 of the License, or (at your option) any later version.`
11			`*`
12			`* History`
13			`* ROSE 001 Jonathan(G4KLX) Cloned from nr_subr.c`
14			`* ROSE 002 Jonathan(G4KLX) Centralised disconnect processing.`
15			`* ROSE 003 Jonathan(G4KLX) Added use count to neighbours.`
16			`*/`
17
18			`#include <linux/errno.h>`
19			`#include <linux/types.h>`
20			`#include <linux/socket.h>`
21			`#include <linux/in.h>`
22			`#include <linux/kernel.h>`
23			`#include <linux/sched.h>`
24			`#include <linux/timer.h>`
25			`#include <linux/string.h>`
26			`#include <linux/sockios.h>`
27			`#include <linux/net.h>`
28			`#include <net/ax25.h>`
29			`#include <linux/inet.h>`
30			`#include <linux/netdevice.h>`
31			`#include <linux/skbuff.h>`
32			`#include <net/sock.h>`
33			`#include <asm/segment.h>`
34			`#include <asm/system.h>`
35			`#include <linux/fcntl.h>`
36			`#include <linux/mm.h>`
37			`#include <linux/interrupt.h>`
38			`#include <net/rose.h>`
39
40			`/*`
41			`* This routine purges all of the queues of frames.`
42			`*/`
43			`void rose_clear_queues(struct sock *sk)`
44			`{`
45			`skb_queue_purge(&sk->write_queue);`
46			`skb_queue_purge(&sk->protinfo.rose->ack_queue);`
47			`}`
48
49			`/*`
50			`* This routine purges the input queue of those frames that have been`
51			`* acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the`
52			`* SDL diagram.`
53			`*/`
54			`void rose_frames_acked(struct sock *sk, unsigned short nr)`
55			`{`
56			`struct sk_buff *skb;`
57
58			`/*`
59			`* Remove all the ack-ed frames from the ack queue.`
60			`*/`
61			`if (sk->protinfo.rose->va != nr) {`
62			`while (skb_peek(&sk->protinfo.rose->ack_queue) != NULL && sk->protinfo.rose->va != nr) {`
63			`skb = skb_dequeue(&sk->protinfo.rose->ack_queue);`
64			`kfree_skb(skb);`
65			`sk->protinfo.rose->va = (sk->protinfo.rose->va + 1) % ROSE_MODULUS;`
66			`}`
67			`}`
68			`}`
69
70			`void rose_requeue_frames(struct sock *sk)`
71			`{`
72			`struct sk_buff skb, skb_prev = NULL;`
73
74			`/*`
75			`* Requeue all the un-ack-ed frames on the output queue to be picked`
76			`* up by rose_kick. This arrangement handles the possibility of an`
77			`* empty output queue.`
78			`*/`
79			`while ((skb = skb_dequeue(&sk->protinfo.rose->ack_queue)) != NULL) {`
80			`if (skb_prev == NULL)`
81			`skb_queue_head(&sk->write_queue, skb);`
82			`else`
83			`skb_append(skb_prev, skb);`
84			`skb_prev = skb;`
85			`}`
86			`}`
87
88			`/*`
89			`* Validate that the value of nr is between va and vs. Return true or`
90			`* false for testing.`
91			`*/`
92			`int rose_validate_nr(struct sock *sk, unsigned short nr)`
93			`{`
94			`unsigned short vc = sk->protinfo.rose->va;`
95
96			`while (vc != sk->protinfo.rose->vs) {`
97			`if (nr == vc) return 1;`
98			`vc = (vc + 1) % ROSE_MODULUS;`
99			`}`
100
101			`if (nr == sk->protinfo.rose->vs) return 1;`
102
103			`return 0;`
104			`}`
105
106			`/*`
107			`* This routine is called when the packet layer internally generates a`
108			`* control frame.`
109			`*/`
110			`void rose_write_internal(struct sock *sk, int frametype)`
111			`{`
112			`struct sk_buff *skb;`
113			`unsigned char *dptr;`
114			`unsigned char lci1, lci2;`
115			`char buffer[100];`
116			`int len, faclen = 0;`
117			`int ax25_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1;`
118
119			`len = ax25_header_len + ROSE_MIN_LEN;`
120
121			`switch (frametype) {`
122			`case ROSE_CALL_REQUEST:`
123			`len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;`
124			`faclen = rose_create_facilities(buffer, sk->protinfo.rose);`
125			`len += faclen;`
126			`break;`
127			`case ROSE_CALL_ACCEPTED:`
128			`case ROSE_RESET_REQUEST:`
129			`len += 2;`
130			`break;`
131			`case ROSE_CLEAR_REQUEST:`
132			`len += 3;`
133			`/* facilities */`
134			`faclen = 3 + 2 + AX25_ADDR_LEN + 3 + ROSE_ADDR_LEN;`
135			`dptr = buffer;`
136			`dptr++ = faclen-1; / Facilities length */`
137			`*dptr++ = 0;`
138			`*dptr++ = FAC_NATIONAL;`
139			`*dptr++ = FAC_NATIONAL_FAIL_CALL;`
140			`*dptr++ = AX25_ADDR_LEN;`
141			`memcpy(dptr, &rose_callsign, AX25_ADDR_LEN);`
142			`dptr += AX25_ADDR_LEN;`
143			`*dptr++ = FAC_NATIONAL_FAIL_ADD;`
144			`*dptr++ = ROSE_ADDR_LEN + 1;`
145			`dptr++ = ROSE_ADDR_LEN 2;`
146			`memcpy(dptr, &sk->protinfo.rose->source_addr, ROSE_ADDR_LEN);`
147			`len += faclen;`
148			`break;`
149			`}`
150
151			`if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)`
152			`return;`
153
154			`/*`
155			`* Space for AX.25 header and PID.`
156			`*/`
157			`skb_reserve(skb, ax25_header_len);`
158
159			`dptr = skb_put(skb, len - ax25_header_len);`
160
161			`lci1 = (sk->protinfo.rose->lci >> 8) & 0x0F;`
162			`lci2 = (sk->protinfo.rose->lci >> 0) & 0xFF;`
163
164			`switch (frametype) {`
165
166			`case ROSE_CALL_REQUEST:`
167			`*dptr++ = ROSE_GFI \| lci1;`
168			`*dptr++ = lci2;`
169			`*dptr++ = frametype;`
170			`*dptr++ = 0xAA;`
171			`memcpy(dptr, &sk->protinfo.rose->dest_addr, ROSE_ADDR_LEN);`
172			`dptr += ROSE_ADDR_LEN;`
173			`memcpy(dptr, &sk->protinfo.rose->source_addr, ROSE_ADDR_LEN);`
174			`dptr += ROSE_ADDR_LEN;`
175			`memcpy(dptr, buffer, faclen);`
176			`dptr += faclen;`
177			`break;`
178
179			`case ROSE_CALL_ACCEPTED:`
180			`*dptr++ = ROSE_GFI \| lci1;`
181			`*dptr++ = lci2;`
182			`*dptr++ = frametype;`
183			`dptr++ = 0x00; / Address length */`
184			`dptr++ = 0; / Facilities length */`
185			`break;`
186
187			`case ROSE_CLEAR_REQUEST:`
188			`*dptr++ = ROSE_GFI \| lci1;`
189			`*dptr++ = lci2;`
190			`*dptr++ = frametype;`
191			`*dptr++ = sk->protinfo.rose->cause;`
192			`*dptr++ = sk->protinfo.rose->diagnostic;`
193			`dptr++ = 0x00; / Address length */`
194			`memcpy(dptr, buffer, faclen);`
195			`dptr += faclen;`
196			`break;`
197
198			`case ROSE_RESET_REQUEST:`
199			`*dptr++ = ROSE_GFI \| lci1;`
200			`*dptr++ = lci2;`
201			`*dptr++ = frametype;`
202			`*dptr++ = ROSE_DTE_ORIGINATED;`
203			`*dptr++ = 0;`
204			`break;`
205
206			`case ROSE_RR:`
207			`case ROSE_RNR:`
208			`*dptr++ = ROSE_GFI \| lci1;`
209			`*dptr++ = lci2;`
210			`*dptr = frametype;`
211			`*dptr++ \|= (sk->protinfo.rose->vr << 5) & 0xE0;`
212			`break;`
213
214			`case ROSE_CLEAR_CONFIRMATION:`
215			`case ROSE_RESET_CONFIRMATION:`
216			`*dptr++ = ROSE_GFI \| lci1;`
217			`*dptr++ = lci2;`
218			`*dptr++ = frametype;`
219			`break;`
220
221			`default:`
222			`printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);`
223			`kfree_skb(skb);`
224			`return;`
225			`}`
226
227			`rose_transmit_link(skb, sk->protinfo.rose->neighbour);`
228			`}`
229
230			`int rose_decode(struct sk_buff skb, int ns, int nr, int q, int d, int m)`
231			`{`
232			`unsigned char *frame;`
233
234			`frame = skb->data;`
235
236			`ns = nr = q = d = *m = 0;`
237
238			`switch (frame[2]) {`
239			`case ROSE_CALL_REQUEST:`
240			`case ROSE_CALL_ACCEPTED:`
241			`case ROSE_CLEAR_REQUEST:`
242			`case ROSE_CLEAR_CONFIRMATION:`
243			`case ROSE_RESET_REQUEST:`
244			`case ROSE_RESET_CONFIRMATION:`
245			`return frame[2];`
246			`default:`
247			`break;`
248			`}`
249
250			`if ((frame[2] & 0x1F) == ROSE_RR \|\|`
251			`(frame[2] & 0x1F) == ROSE_RNR) {`
252			`*nr = (frame[2] >> 5) & 0x07;`
253			`return frame[2] & 0x1F;`
254			`}`
255
256			`if ((frame[2] & 0x01) == ROSE_DATA) {`
257			`*q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;`
258			`*d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;`
259			`*m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;`
260			`*nr = (frame[2] >> 5) & 0x07;`
261			`*ns = (frame[2] >> 1) & 0x07;`
262			`return ROSE_DATA;`
263			`}`
264
265			`return ROSE_ILLEGAL;`
266			`}`
267
268			`static int rose_parse_national(unsigned char p, struct rose_facilities_struct facilities, int len)`
269			`{`
270			`unsigned char *pt;`
271			`unsigned char l, lg, n = 0;`
272			`int fac_national_digis_received = 0;`
273
274			`do {`
275			`switch (*p & 0xC0) {`
276			`case 0x00:`
277			`p += 2;`
278			`n += 2;`
279			`len -= 2;`
280			`break;`
281
282			`case 0x40:`
283			`if (*p == FAC_NATIONAL_RAND)`
284			`facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);`
285			`p += 3;`
286			`n += 3;`
287			`len -= 3;`
288			`break;`
289
290			`case 0x80:`
291			`p += 4;`
292			`n += 4;`
293			`len -= 4;`
294			`break;`
295
296			`case 0xC0:`
297			`l = p[1];`
298			`if (*p == FAC_NATIONAL_DEST_DIGI) {`
299			`if (!fac_national_digis_received) {`
300			`memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);`
301			`facilities->source_ndigis = 1;`
302			`}`
303			`}`
304			`else if (*p == FAC_NATIONAL_SRC_DIGI) {`
305			`if (!fac_national_digis_received) {`
306			`memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);`
307			`facilities->dest_ndigis = 1;`
308			`}`
309			`}`
310			`else if (*p == FAC_NATIONAL_FAIL_CALL) {`
311			`memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);`
312			`}`
313			`else if (*p == FAC_NATIONAL_FAIL_ADD) {`
314			`memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);`
315			`}`
316			`else if (*p == FAC_NATIONAL_DIGIS) {`
317			`fac_national_digis_received = 1;`
318			`facilities->source_ndigis = 0;`
319			`facilities->dest_ndigis = 0;`
320			`for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {`
321			`if (pt[6] & AX25_HBIT)`
322			`memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);`
323			`else`
324			`memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);`
325			`}`
326			`}`
327			`p += l + 2;`
328			`n += l + 2;`
329			`len -= l + 2;`
330			`break;`
331			`}`
332			`} while (*p != 0x00 && len > 0);`
333
334			`return n;`
335			`}`
336
337			`static int rose_parse_ccitt(unsigned char p, struct rose_facilities_struct facilities, int len)`
338			`{`
339			`unsigned char l, n = 0;`
340			`char callsign[11];`
341
342			`do {`
343			`switch (*p & 0xC0) {`
344			`case 0x00:`
345			`p += 2;`
346			`n += 2;`
347			`len -= 2;`
348			`break;`
349
350			`case 0x40:`
351			`p += 3;`
352			`n += 3;`
353			`len -= 3;`
354			`break;`
355
356			`case 0x80:`
357			`p += 4;`
358			`n += 4;`
359			`len -= 4;`
360			`break;`
361
362			`case 0xC0:`
363			`l = p[1];`
364			`if (*p == FAC_CCITT_DEST_NSAP) {`
365			`memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);`
366			`memcpy(callsign, p + 12, l - 10);`
367			`callsign[l - 10] = '\0';`
368			`facilities->source_call = *asc2ax(callsign);`
369			`}`
370			`if (*p == FAC_CCITT_SRC_NSAP) {`
371			`memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);`
372			`memcpy(callsign, p + 12, l - 10);`
373			`callsign[l - 10] = '\0';`
374			`facilities->dest_call = *asc2ax(callsign);`
375			`}`
376			`p += l + 2;`
377			`n += l + 2;`
378			`len -= l + 2;`
379			`break;`
380			`}`
381			`} while (*p != 0x00 && len > 0);`
382
383			`return n;`
384			`}`
385
386			`int rose_parse_facilities(unsigned char p, struct rose_facilities_struct facilities)`
387			`{`
388			`int facilities_len, len;`
389
390			`facilities_len = *p++;`
391
392			`if (facilities_len == 0)`
393			`return 0;`
394
395			`while (facilities_len > 0) {`
396			`if (*p == 0x00) {`
397			`facilities_len--;`
398			`p++;`
399
400			`switch (*p) {`
401			`case FAC_NATIONAL: /* National */`
402			`len = rose_parse_national(p + 1, facilities, facilities_len - 1);`
403			`facilities_len -= len + 1;`
404			`p += len + 1;`
405			`break;`
406
407			`case FAC_CCITT: /* CCITT */`
408			`len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);`
409			`facilities_len -= len + 1;`
410			`p += len + 1;`
411			`break;`
412
413			`default:`
414			`printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);`
415			`facilities_len--;`
416			`p++;`
417			`break;`
418			`}`
419			`}`
420			`else break; /* Error in facilities format */`
421			`}`
422
423			`return 1;`
424			`}`
425
426			`int rose_create_facilities(unsigned char buffer, rose_cb rose)`
427			`{`
428			`unsigned char *p = buffer + 1;`
429			`char *callsign;`
430			`int len, nb;`
431
432			`/* National Facilities */`
433			`if (rose->rand != 0 \|\| rose->source_ndigis == 1 \|\| rose->dest_ndigis == 1) {`
434			`*p++ = 0x00;`
435			`*p++ = FAC_NATIONAL;`
436
437			`if (rose->rand != 0) {`
438			`*p++ = FAC_NATIONAL_RAND;`
439			`*p++ = (rose->rand >> 8) & 0xFF;`
440			`*p++ = (rose->rand >> 0) & 0xFF;`
441			`}`
442
443			`/* Sent before older facilities */`
444			`if ((rose->source_ndigis > 0) \|\| (rose->dest_ndigis > 0)) {`
445			`int maxdigi = 0;`
446			`*p++ = FAC_NATIONAL_DIGIS;`
447			`p++ = AX25_ADDR_LEN (rose->source_ndigis + rose->dest_ndigis);`
448			`for (nb = 0 ; nb < rose->source_ndigis ; nb++) {`
449			`if (++maxdigi >= ROSE_MAX_DIGIS)`
450			`break;`
451			`memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);`
452			`p[6] \|= AX25_HBIT;`
453			`p += AX25_ADDR_LEN;`
454			`}`
455			`for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {`
456			`if (++maxdigi >= ROSE_MAX_DIGIS)`
457			`break;`
458			`memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);`
459			`p[6] &= ~AX25_HBIT;`
460			`p += AX25_ADDR_LEN;`
461			`}`
462			`}`
463
464			`/* For compatibility */`
465			`if (rose->source_ndigis > 0) {`
466			`*p++ = FAC_NATIONAL_SRC_DIGI;`
467			`*p++ = AX25_ADDR_LEN;`
468			`memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);`
469			`p += AX25_ADDR_LEN;`
470			`}`
471
472			`/* For compatibility */`
473			`if (rose->dest_ndigis > 0) {`
474			`*p++ = FAC_NATIONAL_DEST_DIGI;`
475			`*p++ = AX25_ADDR_LEN;`
476			`memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);`
477			`p += AX25_ADDR_LEN;`
478			`}`
479			`}`
480
481			`*p++ = 0x00;`
482			`*p++ = FAC_CCITT;`
483
484			`*p++ = FAC_CCITT_DEST_NSAP;`
485
486			`callsign = ax2asc(&rose->dest_call);`
487
488			`*p++ = strlen(callsign) + 10;`
489			`p++ = (strlen(callsign) + 9) 2; /* ??? */`
490
491			`p++ = 0x47; p++ = 0x00; *p++ = 0x11;`
492			`p++ = ROSE_ADDR_LEN 2;`
493			`memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);`
494			`p += ROSE_ADDR_LEN;`
495
496			`memcpy(p, callsign, strlen(callsign));`
497			`p += strlen(callsign);`
498
499			`*p++ = FAC_CCITT_SRC_NSAP;`
500
501			`callsign = ax2asc(&rose->source_call);`
502
503			`*p++ = strlen(callsign) + 10;`
504			`p++ = (strlen(callsign) + 9) 2; /* ??? */`
505
506			`p++ = 0x47; p++ = 0x00; *p++ = 0x11;`
507			`p++ = ROSE_ADDR_LEN 2;`
508			`memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);`
509			`p += ROSE_ADDR_LEN;`
510
511			`memcpy(p, callsign, strlen(callsign));`
512			`p += strlen(callsign);`
513
514			`len = p - buffer;`
515			`buffer[0] = len - 1;`
516
517			`return len;`
518			`}`
519
520			`void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)`
521			`{`
522			`rose_stop_timer(sk);`
523			`rose_stop_idletimer(sk);`
524
525			`rose_clear_queues(sk);`
526
527			`sk->protinfo.rose->lci = 0;`
528			`sk->protinfo.rose->state = ROSE_STATE_0;`
529
530			`if (cause != -1)`
531			`sk->protinfo.rose->cause = cause;`
532
533			`if (diagnostic != -1)`
534			`sk->protinfo.rose->diagnostic = diagnostic;`
535
536			`sk->state = TCP_CLOSE;`
537			`sk->err = reason;`
538			`sk->shutdown \|= SEND_SHUTDOWN;`
539
540			`if (!sk->dead)`
541			`sk->state_change(sk);`
542
543			`sk->dead = 1;`
544			`}`