URL https://opencores.org/ocsvn/test_project/test_project/trunk

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [rose/] [rose_subr.c] - Blame information for rev 67

Go to most recent revision | Details | Compare with Previous | View Log


/*
 * 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
 * (at your option) any later version.
 *
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 */
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.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 <net/tcp_states.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
 
static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose);
 
/*
 *      This routine purges all of the queues of frames.
 */
void rose_clear_queues(struct sock *sk)
{
        skb_queue_purge(&sk->sk_write_queue);
        skb_queue_purge(&rose_sk(sk)->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;
        struct rose_sock *rose = rose_sk(sk);
 
        /*
         * Remove all the ack-ed frames from the ack queue.
         */
        if (rose->va != nr) {
                while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) {
                        skb = skb_dequeue(&rose->ack_queue);
                        kfree_skb(skb);
                        rose->va = (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(&rose_sk(sk)->ack_queue)) != NULL) {
                if (skb_prev == NULL)
                        skb_queue_head(&sk->sk_write_queue, skb);
                else
                        skb_append(skb_prev, skb, &sk->sk_write_queue);
                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)
{
        struct rose_sock *rose = rose_sk(sk);
        unsigned short vc = rose->va;
 
        while (vc != rose->vs) {
                if (nr == vc) return 1;
                vc = (vc + 1) % ROSE_MODULUS;
        }
 
        return nr == rose->vs;
}
 
/*
 *  This routine is called when the packet layer internally generates a
 *  control frame.
 */
void rose_write_internal(struct sock *sk, int frametype)
{
        struct rose_sock *rose = rose_sk(sk);
        struct sk_buff *skb;
        unsigned char  *dptr;
        unsigned char  lci1, lci2;
        char buffer[100];
        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;
                faclen = rose_create_facilities(buffer, rose);
                len   += faclen;
                break;
        case ROSE_CALL_ACCEPTED:
        case ROSE_CLEAR_REQUEST:
        case ROSE_RESET_REQUEST:
                len   += 2;
                break;
        }
 
        if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
                return;
 
        /*
         *      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 = (rose->lci >> 8) & 0x0F;
        lci2 = (rose->lci >> 0) & 0xFF;
 
        switch (frametype) {
        case ROSE_CALL_REQUEST:
                *dptr++ = ROSE_GFI | lci1;
                *dptr++ = lci2;
                *dptr++ = frametype;
                *dptr++ = 0xAA;
                memcpy(dptr, &rose->dest_addr,  ROSE_ADDR_LEN);
                dptr   += ROSE_ADDR_LEN;
                memcpy(dptr, &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++ = rose->cause;
                *dptr++ = rose->diagnostic;
                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++ |= (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, 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';
                                asc2ax(&facilities->source_call, 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';
                                asc2ax(&facilities->dest_call, 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;
}
 
static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
{
        unsigned char *p = buffer + 1;
        char *callsign;
        char buf[11];
        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(buf, &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(buf, &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)
{
        struct rose_sock *rose = rose_sk(sk);
 
        rose_stop_timer(sk);
        rose_stop_idletimer(sk);
 
        rose_clear_queues(sk);
 
        rose->lci   = 0;
        rose->state = ROSE_STATE_0;
 
        if (cause != -1)
                rose->cause = cause;
 
        if (diagnostic != -1)
                rose->diagnostic = diagnostic;
 
        sk->sk_state     = TCP_CLOSE;
        sk->sk_err       = reason;
        sk->sk_shutdown |= SEND_SHUTDOWN;
 
        if (!sock_flag(sk, SOCK_DEAD)) {
                sk->sk_state_change(sk);
                sock_set_flag(sk, SOCK_DEAD);
        }
}

Browse

Tools

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [rose/] [rose_subr.c] - Blame information for rev 67

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* This program is free software; you can redistribute it and/or modify`
3			`* it under the terms of the GNU General Public License as published by`
4			`* the Free Software Foundation; either version 2 of the License, or`
5			`* (at your option) any later version.`
6			`*`
7			`* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)`
8			`*/`
9			`#include <linux/errno.h>`
10			`#include <linux/types.h>`
11			`#include <linux/socket.h>`
12			`#include <linux/in.h>`
13			`#include <linux/kernel.h>`
14			`#include <linux/timer.h>`
15			`#include <linux/string.h>`
16			`#include <linux/sockios.h>`
17			`#include <linux/net.h>`
18			`#include <net/ax25.h>`
19			`#include <linux/inet.h>`
20			`#include <linux/netdevice.h>`
21			`#include <linux/skbuff.h>`
22			`#include <net/sock.h>`
23			`#include <net/tcp_states.h>`
24			`#include <asm/system.h>`
25			`#include <linux/fcntl.h>`
26			`#include <linux/mm.h>`
27			`#include <linux/interrupt.h>`
28			`#include <net/rose.h>`
29
30			`static int rose_create_facilities(unsigned char buffer, struct rose_sock rose);`
31
32			`/*`
33			`* This routine purges all of the queues of frames.`
34			`*/`
35			`void rose_clear_queues(struct sock *sk)`
36			`{`
37			`skb_queue_purge(&sk->sk_write_queue);`
38			`skb_queue_purge(&rose_sk(sk)->ack_queue);`
39			`}`
40
41			`/*`
42			`* This routine purges the input queue of those frames that have been`
43			`* acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the`
44			`* SDL diagram.`
45			`*/`
46			`void rose_frames_acked(struct sock *sk, unsigned short nr)`
47			`{`
48			`struct sk_buff *skb;`
49			`struct rose_sock *rose = rose_sk(sk);`
50
51			`/*`
52			`* Remove all the ack-ed frames from the ack queue.`
53			`*/`
54			`if (rose->va != nr) {`
55			`while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) {`
56			`skb = skb_dequeue(&rose->ack_queue);`
57			`kfree_skb(skb);`
58			`rose->va = (rose->va + 1) % ROSE_MODULUS;`
59			`}`
60			`}`
61			`}`
62
63			`void rose_requeue_frames(struct sock *sk)`
64			`{`
65			`struct sk_buff skb, skb_prev = NULL;`
66
67			`/*`
68			`* Requeue all the un-ack-ed frames on the output queue to be picked`
69			`* up by rose_kick. This arrangement handles the possibility of an`
70			`* empty output queue.`
71			`*/`
72			`while ((skb = skb_dequeue(&rose_sk(sk)->ack_queue)) != NULL) {`
73			`if (skb_prev == NULL)`
74			`skb_queue_head(&sk->sk_write_queue, skb);`
75			`else`
76			`skb_append(skb_prev, skb, &sk->sk_write_queue);`
77			`skb_prev = skb;`
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			`struct rose_sock *rose = rose_sk(sk);`
88			`unsigned short vc = rose->va;`
89
90			`while (vc != rose->vs) {`
91			`if (nr == vc) return 1;`
92			`vc = (vc + 1) % ROSE_MODULUS;`
93			`}`
94
95			`return nr == rose->vs;`
96			`}`
97
98			`/*`
99			`* This routine is called when the packet layer internally generates a`
100			`* control frame.`
101			`*/`
102			`void rose_write_internal(struct sock *sk, int frametype)`
103			`{`
104			`struct rose_sock *rose = rose_sk(sk);`
105			`struct sk_buff *skb;`
106			`unsigned char *dptr;`
107			`unsigned char lci1, lci2;`
108			`char buffer[100];`
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			`faclen = rose_create_facilities(buffer, rose);`
117			`len += faclen;`
118			`break;`
119			`case ROSE_CALL_ACCEPTED:`
120			`case ROSE_CLEAR_REQUEST:`
121			`case ROSE_RESET_REQUEST:`
122			`len += 2;`
123			`break;`
124			`}`
125
126			`if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)`
127			`return;`
128
129			`/*`
130			`* Space for AX.25 header and PID.`
131			`*/`
132			`skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1);`
133
134			`dptr = skb_put(skb, skb_tailroom(skb));`
135
136			`lci1 = (rose->lci >> 8) & 0x0F;`
137			`lci2 = (rose->lci >> 0) & 0xFF;`
138
139			`switch (frametype) {`
140			`case ROSE_CALL_REQUEST:`
141			`*dptr++ = ROSE_GFI \| lci1;`
142			`*dptr++ = lci2;`
143			`*dptr++ = frametype;`
144			`*dptr++ = 0xAA;`
145			`memcpy(dptr, &rose->dest_addr, ROSE_ADDR_LEN);`
146			`dptr += ROSE_ADDR_LEN;`
147			`memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN);`
148			`dptr += ROSE_ADDR_LEN;`
149			`memcpy(dptr, buffer, faclen);`
150			`dptr += faclen;`
151			`break;`
152
153			`case ROSE_CALL_ACCEPTED:`
154			`*dptr++ = ROSE_GFI \| lci1;`
155			`*dptr++ = lci2;`
156			`*dptr++ = frametype;`
157			`dptr++ = 0x00; / Address length */`
158			`dptr++ = 0; / Facilities length */`
159			`break;`
160
161			`case ROSE_CLEAR_REQUEST:`
162			`*dptr++ = ROSE_GFI \| lci1;`
163			`*dptr++ = lci2;`
164			`*dptr++ = frametype;`
165			`*dptr++ = rose->cause;`
166			`*dptr++ = rose->diagnostic;`
167			`break;`
168
169			`case ROSE_RESET_REQUEST:`
170			`*dptr++ = ROSE_GFI \| lci1;`
171			`*dptr++ = lci2;`
172			`*dptr++ = frametype;`
173			`*dptr++ = ROSE_DTE_ORIGINATED;`
174			`*dptr++ = 0;`
175			`break;`
176
177			`case ROSE_RR:`
178			`case ROSE_RNR:`
179			`*dptr++ = ROSE_GFI \| lci1;`
180			`*dptr++ = lci2;`
181			`*dptr = frametype;`
182			`*dptr++ \|= (rose->vr << 5) & 0xE0;`
183			`break;`
184
185			`case ROSE_CLEAR_CONFIRMATION:`
186			`case ROSE_RESET_CONFIRMATION:`
187			`*dptr++ = ROSE_GFI \| lci1;`
188			`*dptr++ = lci2;`
189			`*dptr++ = frametype;`
190			`break;`
191
192			`default:`
193			`printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);`
194			`kfree_skb(skb);`
195			`return;`
196			`}`
197
198			`rose_transmit_link(skb, rose->neighbour);`
199			`}`
200
201			`int rose_decode(struct sk_buff skb, int ns, int nr, int q, int d, int m)`
202			`{`
203			`unsigned char *frame;`
204
205			`frame = skb->data;`
206
207			`ns = nr = q = d = *m = 0;`
208
209			`switch (frame[2]) {`
210			`case ROSE_CALL_REQUEST:`
211			`case ROSE_CALL_ACCEPTED:`
212			`case ROSE_CLEAR_REQUEST:`
213			`case ROSE_CLEAR_CONFIRMATION:`
214			`case ROSE_RESET_REQUEST:`
215			`case ROSE_RESET_CONFIRMATION:`
216			`return frame[2];`
217			`default:`
218			`break;`
219			`}`
220
221			`if ((frame[2] & 0x1F) == ROSE_RR \|\|`
222			`(frame[2] & 0x1F) == ROSE_RNR) {`
223			`*nr = (frame[2] >> 5) & 0x07;`
224			`return frame[2] & 0x1F;`
225			`}`
226
227			`if ((frame[2] & 0x01) == ROSE_DATA) {`
228			`*q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;`
229			`*d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;`
230			`*m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;`
231			`*nr = (frame[2] >> 5) & 0x07;`
232			`*ns = (frame[2] >> 1) & 0x07;`
233			`return ROSE_DATA;`
234			`}`
235
236			`return ROSE_ILLEGAL;`
237			`}`
238
239			`static int rose_parse_national(unsigned char p, struct rose_facilities_struct facilities, int len)`
240			`{`
241			`unsigned char *pt;`
242			`unsigned char l, lg, n = 0;`
243			`int fac_national_digis_received = 0;`
244
245			`do {`
246			`switch (*p & 0xC0) {`
247			`case 0x00:`
248			`p += 2;`
249			`n += 2;`
250			`len -= 2;`
251			`break;`
252
253			`case 0x40:`
254			`if (*p == FAC_NATIONAL_RAND)`
255			`facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);`
256			`p += 3;`
257			`n += 3;`
258			`len -= 3;`
259			`break;`
260
261			`case 0x80:`
262			`p += 4;`
263			`n += 4;`
264			`len -= 4;`
265			`break;`
266
267			`case 0xC0:`
268			`l = p[1];`
269			`if (*p == FAC_NATIONAL_DEST_DIGI) {`
270			`if (!fac_national_digis_received) {`
271			`memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);`
272			`facilities->source_ndigis = 1;`
273			`}`
274			`}`
275			`else if (*p == FAC_NATIONAL_SRC_DIGI) {`
276			`if (!fac_national_digis_received) {`
277			`memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);`
278			`facilities->dest_ndigis = 1;`
279			`}`
280			`}`
281			`else if (*p == FAC_NATIONAL_FAIL_CALL) {`
282			`memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);`
283			`}`
284			`else if (*p == FAC_NATIONAL_FAIL_ADD) {`
285			`memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);`
286			`}`
287			`else if (*p == FAC_NATIONAL_DIGIS) {`
288			`fac_national_digis_received = 1;`
289			`facilities->source_ndigis = 0;`
290			`facilities->dest_ndigis = 0;`
291			`for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {`
292			`if (pt[6] & AX25_HBIT)`
293			`memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);`
294			`else`
295			`memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);`
296			`}`
297			`}`
298			`p += l + 2;`
299			`n += l + 2;`
300			`len -= l + 2;`
301			`break;`
302			`}`
303			`} while (*p != 0x00 && len > 0);`
304
305			`return n;`
306			`}`
307
308			`static int rose_parse_ccitt(unsigned char p, struct rose_facilities_struct facilities, int len)`
309			`{`
310			`unsigned char l, n = 0;`
311			`char callsign[11];`
312
313			`do {`
314			`switch (*p & 0xC0) {`
315			`case 0x00:`
316			`p += 2;`
317			`n += 2;`
318			`len -= 2;`
319			`break;`
320
321			`case 0x40:`
322			`p += 3;`
323			`n += 3;`
324			`len -= 3;`
325			`break;`
326
327			`case 0x80:`
328			`p += 4;`
329			`n += 4;`
330			`len -= 4;`
331			`break;`
332
333			`case 0xC0:`
334			`l = p[1];`
335			`if (*p == FAC_CCITT_DEST_NSAP) {`
336			`memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);`
337			`memcpy(callsign, p + 12, l - 10);`
338			`callsign[l - 10] = '\0';`
339			`asc2ax(&facilities->source_call, callsign);`
340			`}`
341			`if (*p == FAC_CCITT_SRC_NSAP) {`
342			`memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);`
343			`memcpy(callsign, p + 12, l - 10);`
344			`callsign[l - 10] = '\0';`
345			`asc2ax(&facilities->dest_call, callsign);`
346			`}`
347			`p += l + 2;`
348			`n += l + 2;`
349			`len -= l + 2;`
350			`break;`
351			`}`
352			`} while (*p != 0x00 && len > 0);`
353
354			`return n;`
355			`}`
356
357			`int rose_parse_facilities(unsigned char *p,`
358			`struct rose_facilities_struct *facilities)`
359			`{`
360			`int facilities_len, len;`
361
362			`facilities_len = *p++;`
363
364			`if (facilities_len == 0)`
365			`return 0;`
366
367			`while (facilities_len > 0) {`
368			`if (*p == 0x00) {`
369			`facilities_len--;`
370			`p++;`
371
372			`switch (*p) {`
373			`case FAC_NATIONAL: /* National */`
374			`len = rose_parse_national(p + 1, facilities, facilities_len - 1);`
375			`facilities_len -= len + 1;`
376			`p += len + 1;`
377			`break;`
378
379			`case FAC_CCITT: /* CCITT */`
380			`len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);`
381			`facilities_len -= len + 1;`
382			`p += len + 1;`
383			`break;`
384
385			`default:`
386			`printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);`
387			`facilities_len--;`
388			`p++;`
389			`break;`
390			`}`
391			`} else`
392			`break; /* Error in facilities format */`
393			`}`
394
395			`return 1;`
396			`}`
397
398			`static int rose_create_facilities(unsigned char buffer, struct rose_sock rose)`
399			`{`
400			`unsigned char *p = buffer + 1;`
401			`char *callsign;`
402			`char buf[11];`
403			`int len, nb;`
404
405			`/* National Facilities */`
406			`if (rose->rand != 0 \|\| rose->source_ndigis == 1 \|\| rose->dest_ndigis == 1) {`
407			`*p++ = 0x00;`
408			`*p++ = FAC_NATIONAL;`
409
410			`if (rose->rand != 0) {`
411			`*p++ = FAC_NATIONAL_RAND;`
412			`*p++ = (rose->rand >> 8) & 0xFF;`
413			`*p++ = (rose->rand >> 0) & 0xFF;`
414			`}`
415
416			`/* Sent before older facilities */`
417			`if ((rose->source_ndigis > 0) \|\| (rose->dest_ndigis > 0)) {`
418			`int maxdigi = 0;`
419			`*p++ = FAC_NATIONAL_DIGIS;`
420			`p++ = AX25_ADDR_LEN (rose->source_ndigis + rose->dest_ndigis);`
421			`for (nb = 0 ; nb < rose->source_ndigis ; nb++) {`
422			`if (++maxdigi >= ROSE_MAX_DIGIS)`
423			`break;`
424			`memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);`
425			`p[6] \|= AX25_HBIT;`
426			`p += AX25_ADDR_LEN;`
427			`}`
428			`for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {`
429			`if (++maxdigi >= ROSE_MAX_DIGIS)`
430			`break;`
431			`memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);`
432			`p[6] &= ~AX25_HBIT;`
433			`p += AX25_ADDR_LEN;`
434			`}`
435			`}`
436
437			`/* For compatibility */`
438			`if (rose->source_ndigis > 0) {`
439			`*p++ = FAC_NATIONAL_SRC_DIGI;`
440			`*p++ = AX25_ADDR_LEN;`
441			`memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);`
442			`p += AX25_ADDR_LEN;`
443			`}`
444
445			`/* For compatibility */`
446			`if (rose->dest_ndigis > 0) {`
447			`*p++ = FAC_NATIONAL_DEST_DIGI;`
448			`*p++ = AX25_ADDR_LEN;`
449			`memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);`
450			`p += AX25_ADDR_LEN;`
451			`}`
452			`}`
453
454			`*p++ = 0x00;`
455			`*p++ = FAC_CCITT;`
456
457			`*p++ = FAC_CCITT_DEST_NSAP;`
458
459			`callsign = ax2asc(buf, &rose->dest_call);`
460
461			`*p++ = strlen(callsign) + 10;`
462			`p++ = (strlen(callsign) + 9) 2; /* ??? */`
463
464			`p++ = 0x47; p++ = 0x00; *p++ = 0x11;`
465			`p++ = ROSE_ADDR_LEN 2;`
466			`memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);`
467			`p += ROSE_ADDR_LEN;`
468
469			`memcpy(p, callsign, strlen(callsign));`
470			`p += strlen(callsign);`
471
472			`*p++ = FAC_CCITT_SRC_NSAP;`
473
474			`callsign = ax2asc(buf, &rose->source_call);`
475
476			`*p++ = strlen(callsign) + 10;`
477			`p++ = (strlen(callsign) + 9) 2; /* ??? */`
478
479			`p++ = 0x47; p++ = 0x00; *p++ = 0x11;`
480			`p++ = ROSE_ADDR_LEN 2;`
481			`memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);`
482			`p += ROSE_ADDR_LEN;`
483
484			`memcpy(p, callsign, strlen(callsign));`
485			`p += strlen(callsign);`
486
487			`len = p - buffer;`
488			`buffer[0] = len - 1;`
489
490			`return len;`
491			`}`
492
493			`void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)`
494			`{`
495			`struct rose_sock *rose = rose_sk(sk);`
496
497			`rose_stop_timer(sk);`
498			`rose_stop_idletimer(sk);`
499
500			`rose_clear_queues(sk);`
501
502			`rose->lci = 0;`
503			`rose->state = ROSE_STATE_0;`
504
505			`if (cause != -1)`
506			`rose->cause = cause;`
507
508			`if (diagnostic != -1)`
509			`rose->diagnostic = diagnostic;`
510
511			`sk->sk_state = TCP_CLOSE;`
512			`sk->sk_err = reason;`
513			`sk->sk_shutdown \|= SEND_SHUTDOWN;`
514
515			`if (!sock_flag(sk, SOCK_DEAD)) {`
516			`sk->sk_state_change(sk);`
517			`sock_set_flag(sk, SOCK_DEAD);`
518			`}`
519			`}`