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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [net/] [rose/] [rose_subr.c] - Blame information for rev 1765

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/*
 *      ROSE release 003
 *
 *      This code REQUIRES 2.1.0 or higher/ NET3.029
 *
 *      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
 */
 
#include <linux/config.h>
#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
#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)
{
        struct sk_buff *skb;
 
        while ((skb = skb_dequeue(&sk->write_queue)) != NULL)
                kfree_skb(skb, FREE_WRITE);
 
        while ((skb = skb_dequeue(&sk->protinfo.rose->ack_queue)) != NULL)
                kfree_skb(skb, FREE_WRITE);
 
#ifdef M_BIT
        while ((skb = skb_dequeue(&sk->protinfo.rose->frag_queue)) != NULL)
                kfree_skb(skb, FREE_READ);
#endif
}
 
/*
 * 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, FREE_WRITE);
                        sk->protinfo.rose->va = (sk->protinfo.rose->va + 1) % ROSE_MODULUS;
                }
        }
}
 
/*
 *      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[250];
        int len, faclen = 0;
 
        len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;
 
        switch (frametype) {
                case ROSE_CALL_REQUEST:
                        len   += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
                        /* facilities */
                        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;
 
        skb->free = 1;
 
        /*
         *      Space for AX.25 header and PID.
         */
        skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1);
 
        dptr = skb_put(skb, skb_tailroom(skb));
 
        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++ = 0x00;         /* Address length */
                        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_write_internal: invalid frametype %02X\n", frametype);
                        kfree_skb(skb, FREE_WRITE);
                        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);
                                }
                                else 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 0x00 */
                                        len = rose_parse_national(p + 1, facilities, facilities_len - 1);
                                        facilities_len -= len + 1;
                                        p += len + 1;
                                        break;
 
                                case FAC_CCITT:         /* CCITT 0x0F */
                                        len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);
                                        facilities_len -= len + 1;
                                        p += len + 1;
                                        break;
 
                                default:
                                        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;
        int 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;
}
 
#endif

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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [net/] [rose/] [rose_subr.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* ROSE release 003`
3			`*`
4			`* This code REQUIRES 2.1.0 or higher/ NET3.029`
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			`*/`
15
16			`#include <linux/config.h>`
17			`#if defined(CONFIG_ROSE) \|\| defined(CONFIG_ROSE_MODULE)`
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			`struct sk_buff *skb;`
46
47			`while ((skb = skb_dequeue(&sk->write_queue)) != NULL)`
48			`kfree_skb(skb, FREE_WRITE);`
49
50			`while ((skb = skb_dequeue(&sk->protinfo.rose->ack_queue)) != NULL)`
51			`kfree_skb(skb, FREE_WRITE);`
52
53			`#ifdef M_BIT`
54			`while ((skb = skb_dequeue(&sk->protinfo.rose->frag_queue)) != NULL)`
55			`kfree_skb(skb, FREE_READ);`
56			`#endif`
57			`}`
58
59			`/*`
60			`* This routine purges the input queue of those frames that have been`
61			`* acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the`
62			`* SDL diagram.`
63			`*/`
64			`void rose_frames_acked(struct sock *sk, unsigned short nr)`
65			`{`
66			`struct sk_buff *skb;`
67
68			`/*`
69			`* Remove all the ack-ed frames from the ack queue.`
70			`*/`
71			`if (sk->protinfo.rose->va != nr) {`
72
73			`while (skb_peek(&sk->protinfo.rose->ack_queue) != NULL && sk->protinfo.rose->va != nr) {`
74			`skb = skb_dequeue(&sk->protinfo.rose->ack_queue);`
75			`kfree_skb(skb, FREE_WRITE);`
76			`sk->protinfo.rose->va = (sk->protinfo.rose->va + 1) % ROSE_MODULUS;`
77			`}`
78			`}`
79			`}`
80
81			`/*`
82			`* Validate that the value of nr is between va and vs. Return true or`
83			`* false for testing.`
84			`*/`
85			`int rose_validate_nr(struct sock *sk, unsigned short nr)`
86			`{`
87			`unsigned short vc = sk->protinfo.rose->va;`
88
89			`while (vc != sk->protinfo.rose->vs) {`
90			`if (nr == vc) return 1;`
91			`vc = (vc + 1) % ROSE_MODULUS;`
92			`}`
93
94			`if (nr == sk->protinfo.rose->vs) return 1;`
95
96			`return 0;`
97			`}`
98
99			`/*`
100			`* This routine is called when the packet layer internally generates a`
101			`* control frame.`
102			`*/`
103			`void rose_write_internal(struct sock *sk, int frametype)`
104			`{`
105			`struct sk_buff *skb;`
106			`unsigned char *dptr;`
107			`unsigned char lci1, lci2;`
108			`char buffer[250];`
109			`int len, faclen = 0;`
110
111			`len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;`
112
113			`switch (frametype) {`
114			`case ROSE_CALL_REQUEST:`
115			`len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;`
116			`/* facilities */`
117			`faclen = rose_create_facilities(buffer, sk->protinfo.rose);`
118			`len += faclen;`
119			`break;`
120			`case ROSE_CALL_ACCEPTED:`
121			`case ROSE_RESET_REQUEST:`
122			`len += 2;`
123			`break;`
124			`case ROSE_CLEAR_REQUEST:`
125			`len += 3;`
126			`/* facilities */`
127			`faclen = 3 + 2 + AX25_ADDR_LEN + 3 + ROSE_ADDR_LEN;`
128			`dptr = buffer;`
129			`dptr++ = faclen-1; / Facilities length */`
130			`*dptr++ = 0;`
131			`*dptr++ = FAC_NATIONAL;`
132			`*dptr++ = FAC_NATIONAL_FAIL_CALL;`
133			`*dptr++ = AX25_ADDR_LEN;`
134			`memcpy(dptr, &rose_callsign, AX25_ADDR_LEN);`
135			`dptr += AX25_ADDR_LEN;`
136			`*dptr++ = FAC_NATIONAL_FAIL_ADD;`
137			`*dptr++ = ROSE_ADDR_LEN + 1;`
138			`dptr++ = ROSE_ADDR_LEN 2;`
139			`memcpy(dptr, &sk->protinfo.rose->source_addr, ROSE_ADDR_LEN);`
140			`len += faclen;`
141			`break;`
142			`}`
143
144			`if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)`
145			`return;`
146
147			`skb->free = 1;`
148
149			`/*`
150			`* Space for AX.25 header and PID.`
151			`*/`
152			`skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1);`
153
154			`dptr = skb_put(skb, skb_tailroom(skb));`
155
156			`lci1 = (sk->protinfo.rose->lci >> 8) & 0x0F;`
157			`lci2 = (sk->protinfo.rose->lci >> 0) & 0xFF;`
158
159			`switch (frametype) {`
160
161			`case ROSE_CALL_REQUEST:`
162			`*dptr++ = ROSE_GFI \| lci1;`
163			`*dptr++ = lci2;`
164			`*dptr++ = frametype;`
165			`*dptr++ = 0xAA;`
166			`memcpy(dptr, &sk->protinfo.rose->dest_addr, ROSE_ADDR_LEN);`
167			`dptr += ROSE_ADDR_LEN;`
168			`memcpy(dptr, &sk->protinfo.rose->source_addr, ROSE_ADDR_LEN);`
169			`dptr += ROSE_ADDR_LEN;`
170			`memcpy(dptr, buffer, faclen);`
171			`dptr += faclen;`
172			`break;`
173
174			`case ROSE_CALL_ACCEPTED:`
175			`*dptr++ = ROSE_GFI \| lci1;`
176			`*dptr++ = lci2;`
177			`*dptr++ = frametype;`
178			`dptr++ = 0x00; / Address length */`
179			`dptr++ = 0; / Facilities length */`
180			`break;`
181
182			`case ROSE_CLEAR_REQUEST:`
183			`*dptr++ = ROSE_GFI \| lci1;`
184			`*dptr++ = lci2;`
185			`*dptr++ = frametype;`
186			`*dptr++ = sk->protinfo.rose->cause;`
187			`*dptr++ = sk->protinfo.rose->diagnostic;`
188			`dptr++ = 0x00; / Address length */`
189			`memcpy(dptr, buffer, faclen);`
190			`dptr += faclen;`
191			`break;`
192
193			`case ROSE_RESET_REQUEST:`
194			`*dptr++ = ROSE_GFI \| lci1;`
195			`*dptr++ = lci2;`
196			`*dptr++ = frametype;`
197			`*dptr++ = ROSE_DTE_ORIGINATED;`
198			`dptr++ = 0x00; / Address length */`
199			`break;`
200
201			`case ROSE_RR:`
202			`case ROSE_RNR:`
203			`*dptr++ = ROSE_GFI \| lci1;`
204			`*dptr++ = lci2;`
205			`*dptr = frametype;`
206			`*dptr++ \|= (sk->protinfo.rose->vr << 5) & 0xE0;`
207			`break;`
208
209			`case ROSE_CLEAR_CONFIRMATION:`
210			`case ROSE_RESET_CONFIRMATION:`
211			`*dptr++ = ROSE_GFI \| lci1;`
212			`*dptr++ = lci2;`
213			`*dptr++ = frametype;`
214			`break;`
215
216			`default:`
217			`printk(KERN_ERR "rose_write_internal: invalid frametype %02X\n", frametype);`
218			`kfree_skb(skb, FREE_WRITE);`
219			`return;`
220			`}`
221
222			`rose_transmit_link(skb, sk->protinfo.rose->neighbour);`
223			`}`
224
225			`int rose_decode(struct sk_buff skb, int ns, int nr, int q, int d, int m)`
226			`{`
227			`unsigned char *frame;`
228
229			`frame = skb->data;`
230
231			`ns = nr = q = d = *m = 0;`
232
233			`switch (frame[2]) {`
234			`case ROSE_CALL_REQUEST:`
235			`case ROSE_CALL_ACCEPTED:`
236			`case ROSE_CLEAR_REQUEST:`
237			`case ROSE_CLEAR_CONFIRMATION:`
238			`case ROSE_RESET_REQUEST:`
239			`case ROSE_RESET_CONFIRMATION:`
240			`return frame[2];`
241			`default:`
242			`break;`
243			`}`
244
245			`if ((frame[2] & 0x1F) == ROSE_RR \|\|`
246			`(frame[2] & 0x1F) == ROSE_RNR) {`
247			`*nr = (frame[2] >> 5) & 0x07;`
248			`return frame[2] & 0x1F;`
249			`}`
250
251			`if ((frame[2] & 0x01) == ROSE_DATA) {`
252			`*q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;`
253			`*d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;`
254			`*m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;`
255			`*nr = (frame[2] >> 5) & 0x07;`
256			`*ns = (frame[2] >> 1) & 0x07;`
257			`return ROSE_DATA;`
258			`}`
259
260			`return ROSE_ILLEGAL;`
261			`}`
262
263			`static int rose_parse_national(unsigned char p, struct rose_facilities_struct facilities, int len)`
264			`{`
265			`unsigned char *pt;`
266			`unsigned char l, lg, n = 0;`
267			`int fac_national_digis_received = 0;`
268
269			`do {`
270			`switch (*p & 0xC0) {`
271			`case 0x00:`
272			`p += 2;`
273			`n += 2;`
274			`len -= 2;`
275			`break;`
276
277			`case 0x40:`
278			`if (*p == FAC_NATIONAL_RAND)`
279			`facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);`
280			`p += 3;`
281			`n += 3;`
282			`len -= 3;`
283			`break;`
284
285			`case 0x80:`
286			`p += 4;`
287			`n += 4;`
288			`len -= 4;`
289			`break;`
290
291			`case 0xC0:`
292			`l = p[1];`
293			`if (*p == FAC_NATIONAL_DEST_DIGI) {`
294			`if (!fac_national_digis_received) {`
295			`memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);`
296			`facilities->source_ndigis = 1;`
297			`}`
298			`}`
299			`else if (*p == FAC_NATIONAL_SRC_DIGI) {`
300			`if (!fac_national_digis_received) {`
301			`memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);`
302			`facilities->dest_ndigis = 1;`
303			`}`
304			`}`
305			`else if (*p == FAC_NATIONAL_FAIL_CALL) {`
306			`memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);`
307			`}`
308			`else if (*p == FAC_NATIONAL_FAIL_ADD) {`
309			`memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);`
310			`}`
311			`else if (*p == FAC_NATIONAL_DIGIS) {`
312			`fac_national_digis_received = 1;`
313			`facilities->source_ndigis = 0;`
314			`facilities->dest_ndigis = 0;`
315			`for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {`
316			`if (pt[6] & AX25_HBIT)`
317			`memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);`
318			`else`
319			`memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);`
320			`}`
321			`}`
322			`p += l + 2;`
323			`n += l + 2;`
324			`len -= l + 2;`
325			`break;`
326			`}`
327			`} while (*p != 0x00 && len > 0);`
328
329			`return n;`
330			`}`
331
332			`static int rose_parse_ccitt(unsigned char p, struct rose_facilities_struct facilities, int len)`
333			`{`
334			`unsigned char l, n = 0;`
335			`char callsign[11];`
336
337			`do {`
338			`switch (*p & 0xC0) {`
339			`case 0x00:`
340			`p += 2;`
341			`n += 2;`
342			`len -= 2;`
343			`break;`
344
345			`case 0x40:`
346			`p += 3;`
347			`n += 3;`
348			`len -= 3;`
349			`break;`
350
351			`case 0x80:`
352			`p += 4;`
353			`n += 4;`
354			`len -= 4;`
355			`break;`
356
357			`case 0xC0:`
358			`l = p[1];`
359			`if (*p == FAC_CCITT_DEST_NSAP) {`
360			`memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);`
361			`memcpy(callsign, p + 12, l - 10);`
362			`callsign[l - 10] = '\0';`
363			`facilities->source_call = *asc2ax(callsign);`
364			`}`
365			`else if (*p == FAC_CCITT_SRC_NSAP) {`
366			`memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);`
367			`memcpy(callsign, p + 12, l - 10);`
368			`callsign[l - 10] = '\0';`
369			`facilities->dest_call = *asc2ax(callsign);`
370			`}`
371			`p += l + 2;`
372			`n += l + 2;`
373			`len -= l + 2;`
374			`break;`
375			`}`
376			`} while (*p != 0x00 && len > 0);`
377
378			`return n;`
379			`}`
380
381			`int rose_parse_facilities(unsigned char p, struct rose_facilities_struct facilities)`
382			`{`
383			`int facilities_len, len;`
384
385			`facilities_len = *p++;`
386
387			`if (facilities_len == 0)`
388			`return 0;`
389
390			`while (facilities_len > 0) {`
391			`if (*p == 0x00) {`
392			`facilities_len--;`
393			`p++;`
394
395			`switch (*p) {`
396			`case FAC_NATIONAL: /* National 0x00 */`
397			`len = rose_parse_national(p + 1, facilities, facilities_len - 1);`
398			`facilities_len -= len + 1;`
399			`p += len + 1;`
400			`break;`
401
402			`case FAC_CCITT: /* CCITT 0x0F */`
403			`len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);`
404			`facilities_len -= len + 1;`
405			`p += len + 1;`
406			`break;`
407
408			`default:`
409			`facilities_len--;`
410			`p++;`
411			`break;`
412			`}`
413			`}`
414			`else break; /* Error in facilities format */`
415			`}`
416
417			`return 1;`
418			`}`
419
420			`int rose_create_facilities(unsigned char buffer, rose_cb rose)`
421			`{`
422			`unsigned char *p = buffer + 1;`
423			`char *callsign;`
424			`int len;`
425			`int nb;`
426
427			`/* National Facilities */`
428			`if (rose->rand != 0 \|\| rose->source_ndigis == 1 \|\| rose->dest_ndigis == 1) {`
429			`*p++ = 0x00;`
430			`*p++ = FAC_NATIONAL;`
431
432			`if (rose->rand != 0) {`
433			`*p++ = FAC_NATIONAL_RAND;`
434			`*p++ = (rose->rand >> 8) & 0xFF;`
435			`*p++ = (rose->rand >> 0) & 0xFF;`
436			`}`
437
438			`/* Sent before older facilities */`
439			`if ((rose->source_ndigis > 0) \|\| (rose->dest_ndigis > 0)) {`
440			`int maxdigi = 0;`
441			`*p++ = FAC_NATIONAL_DIGIS;`
442			`p++ = AX25_ADDR_LEN (rose->source_ndigis + rose->dest_ndigis);`
443			`for (nb = 0 ; nb < rose->source_ndigis ; nb++) {`
444			`if (++maxdigi >= ROSE_MAX_DIGIS)`
445			`break;`
446			`memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);`
447			`p[6] \|= AX25_HBIT;`
448			`p += AX25_ADDR_LEN;`
449			`}`
450			`for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {`
451			`if (++maxdigi >= ROSE_MAX_DIGIS)`
452			`break;`
453			`memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);`
454			`p[6] &= ~AX25_HBIT;`
455			`p += AX25_ADDR_LEN;`
456			`}`
457			`}`
458
459			`/* For compatibility */`
460			`if (rose->source_ndigis > 0) {`
461			`*p++ = FAC_NATIONAL_SRC_DIGI;`
462			`*p++ = AX25_ADDR_LEN;`
463			`memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);`
464			`p += AX25_ADDR_LEN;`
465			`}`
466
467			`/* For compatibility */`
468			`if (rose->dest_ndigis > 0) {`
469			`*p++ = FAC_NATIONAL_DEST_DIGI;`
470			`*p++ = AX25_ADDR_LEN;`
471			`memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);`
472			`p += AX25_ADDR_LEN;`
473			`}`
474
475			`}`
476
477			`*p++ = 0x00;`
478			`*p++ = FAC_CCITT;`
479
480			`*p++ = FAC_CCITT_DEST_NSAP;`
481
482			`callsign = ax2asc(&rose->dest_call);`
483
484			`*p++ = strlen(callsign) + 10;`
485			`p++ = (strlen(callsign) + 9) 2; /* ??? */`
486
487			`p++ = 0x47; p++ = 0x00; *p++ = 0x11;`
488			`p++ = ROSE_ADDR_LEN 2;`
489			`memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);`
490			`p += ROSE_ADDR_LEN;`
491
492			`memcpy(p, callsign, strlen(callsign));`
493			`p += strlen(callsign);`
494
495			`*p++ = FAC_CCITT_SRC_NSAP;`
496
497			`callsign = ax2asc(&rose->source_call);`
498
499			`*p++ = strlen(callsign) + 10;`
500			`p++ = (strlen(callsign) + 9) 2; /* ??? */`
501
502			`p++ = 0x47; p++ = 0x00; *p++ = 0x11;`
503			`p++ = ROSE_ADDR_LEN 2;`
504			`memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);`
505			`p += ROSE_ADDR_LEN;`
506
507			`memcpy(p, callsign, strlen(callsign));`
508			`p += strlen(callsign);`
509
510			`len = p - buffer;`
511			`buffer[0] = len - 1;`
512
513			`return len;`
514			`}`
515
516			`#endif`