^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sockios.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <net/ax25.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <net/tcp_states.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <net/rose.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * This routine purges all of the queues of frames.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) void rose_clear_queues(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) skb_queue_purge(&sk->sk_write_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) skb_queue_purge(&rose_sk(sk)->ack_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * This routine purges the input queue of those frames that have been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * SDL diagram.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) void rose_frames_acked(struct sock *sk, unsigned short nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct rose_sock *rose = rose_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * Remove all the ack-ed frames from the ack queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (rose->va != nr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) skb = skb_dequeue(&rose->ack_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) rose->va = (rose->va + 1) % ROSE_MODULUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) void rose_requeue_frames(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct sk_buff *skb, *skb_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * Requeue all the un-ack-ed frames on the output queue to be picked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * up by rose_kick. This arrangement handles the possibility of an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * empty output queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) while ((skb = skb_dequeue(&rose_sk(sk)->ack_queue)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (skb_prev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) skb_queue_head(&sk->sk_write_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) skb_append(skb_prev, skb, &sk->sk_write_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) skb_prev = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * Validate that the value of nr is between va and vs. Return true or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * false for testing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int rose_validate_nr(struct sock *sk, unsigned short nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct rose_sock *rose = rose_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned short vc = rose->va;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) while (vc != rose->vs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (nr == vc) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) vc = (vc + 1) % ROSE_MODULUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return nr == rose->vs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * This routine is called when the packet layer internally generates a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * control frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) void rose_write_internal(struct sock *sk, int frametype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct rose_sock *rose = rose_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned char *dptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned char lci1, lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int maxfaclen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int len, faclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int reserve;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) reserve = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) len = ROSE_MIN_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) case ROSE_CALL_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) maxfaclen = 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) case ROSE_CALL_ACCEPTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) case ROSE_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) case ROSE_RESET_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) len += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) skb = alloc_skb(reserve + len + maxfaclen, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * Space for AX.25 header and PID.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) skb_reserve(skb, reserve);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dptr = skb_put(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) lci1 = (rose->lci >> 8) & 0x0F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) lci2 = (rose->lci >> 0) & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) case ROSE_CALL_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) *dptr++ = ROSE_GFI | lci1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) *dptr++ = lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) *dptr++ = frametype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) *dptr++ = ROSE_CALL_REQ_ADDR_LEN_VAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) memcpy(dptr, &rose->dest_addr, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) dptr += ROSE_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) dptr += ROSE_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) faclen = rose_create_facilities(dptr, rose);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) skb_put(skb, faclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) dptr += faclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) case ROSE_CALL_ACCEPTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) *dptr++ = ROSE_GFI | lci1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) *dptr++ = lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) *dptr++ = frametype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *dptr++ = 0x00; /* Address length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) *dptr++ = 0; /* Facilities length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) case ROSE_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) *dptr++ = ROSE_GFI | lci1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) *dptr++ = lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) *dptr++ = frametype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) *dptr++ = rose->cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) *dptr++ = rose->diagnostic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) case ROSE_RESET_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) *dptr++ = ROSE_GFI | lci1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) *dptr++ = lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) *dptr++ = frametype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) *dptr++ = ROSE_DTE_ORIGINATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) *dptr++ = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) case ROSE_RR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) case ROSE_RNR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) *dptr++ = ROSE_GFI | lci1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) *dptr++ = lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) *dptr = frametype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) *dptr++ |= (rose->vr << 5) & 0xE0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) case ROSE_CLEAR_CONFIRMATION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) case ROSE_RESET_CONFIRMATION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) *dptr++ = ROSE_GFI | lci1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) *dptr++ = lci2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) *dptr++ = frametype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rose_transmit_link(skb, rose->neighbour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int rose_decode(struct sk_buff *skb, int *ns, int *nr, int *q, int *d, int *m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) unsigned char *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) frame = skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) *ns = *nr = *q = *d = *m = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) switch (frame[2]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) case ROSE_CALL_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) case ROSE_CALL_ACCEPTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) case ROSE_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) case ROSE_CLEAR_CONFIRMATION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) case ROSE_RESET_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) case ROSE_RESET_CONFIRMATION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return frame[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if ((frame[2] & 0x1F) == ROSE_RR ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) (frame[2] & 0x1F) == ROSE_RNR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) *nr = (frame[2] >> 5) & 0x07;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return frame[2] & 0x1F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if ((frame[2] & 0x01) == ROSE_DATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) *q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) *d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) *m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) *nr = (frame[2] >> 5) & 0x07;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) *ns = (frame[2] >> 1) & 0x07;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return ROSE_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return ROSE_ILLEGAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static int rose_parse_national(unsigned char *p, struct rose_facilities_struct *facilities, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) unsigned char *pt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) unsigned char l, lg, n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int fac_national_digis_received = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) switch (*p & 0xC0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) case 0x00:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (len < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) p += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) n += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) len -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) case 0x40:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (len < 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (*p == FAC_NATIONAL_RAND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) p += 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) n += 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) len -= 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) case 0x80:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (len < 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) p += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) n += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) len -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) case 0xC0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (len < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) l = p[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (len < 2 + l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (*p == FAC_NATIONAL_DEST_DIGI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (!fac_national_digis_received) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (l < AX25_ADDR_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) facilities->source_ndigis = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) else if (*p == FAC_NATIONAL_SRC_DIGI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (!fac_national_digis_received) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (l < AX25_ADDR_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) facilities->dest_ndigis = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) else if (*p == FAC_NATIONAL_FAIL_CALL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (l < AX25_ADDR_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) else if (*p == FAC_NATIONAL_FAIL_ADD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (l < 1 + ROSE_ADDR_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) else if (*p == FAC_NATIONAL_DIGIS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (l % AX25_ADDR_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) fac_national_digis_received = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) facilities->source_ndigis = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) facilities->dest_ndigis = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (pt[6] & AX25_HBIT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (facilities->dest_ndigis >= ROSE_MAX_DIGIS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (facilities->source_ndigis >= ROSE_MAX_DIGIS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) p += l + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) n += l + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) len -= l + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) } while (*p != 0x00 && len > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *facilities, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) unsigned char l, n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) char callsign[11];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) switch (*p & 0xC0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) case 0x00:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (len < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) p += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) n += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) len -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) case 0x40:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) if (len < 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) p += 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) n += 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) len -= 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) case 0x80:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (len < 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) p += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) n += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) len -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) case 0xC0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (len < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) l = p[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /* Prevent overflows*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (l < 10 || l > 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (*p == FAC_CCITT_DEST_NSAP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) memcpy(callsign, p + 12, l - 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) callsign[l - 10] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) asc2ax(&facilities->source_call, callsign);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (*p == FAC_CCITT_SRC_NSAP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) memcpy(callsign, p + 12, l - 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) callsign[l - 10] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) asc2ax(&facilities->dest_call, callsign);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) p += l + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) n += l + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) len -= l + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) } while (*p != 0x00 && len > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) int rose_parse_facilities(unsigned char *p, unsigned packet_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct rose_facilities_struct *facilities)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) int facilities_len, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) facilities_len = *p++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (facilities_len == 0 || (unsigned int)facilities_len > packet_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) while (facilities_len >= 3 && *p == 0x00) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) facilities_len--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) p++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) switch (*p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) case FAC_NATIONAL: /* National */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) len = rose_parse_national(p + 1, facilities, facilities_len - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) case FAC_CCITT: /* CCITT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) len = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) if (WARN_ON(len >= facilities_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) facilities_len -= len + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) p += len + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return facilities_len == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) unsigned char *p = buffer + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) char *callsign;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) char buf[11];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) int len, nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* National Facilities */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (rose->rand != 0 || rose->source_ndigis == 1 || rose->dest_ndigis == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) *p++ = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) *p++ = FAC_NATIONAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (rose->rand != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) *p++ = FAC_NATIONAL_RAND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) *p++ = (rose->rand >> 8) & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) *p++ = (rose->rand >> 0) & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) /* Sent before older facilities */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if ((rose->source_ndigis > 0) || (rose->dest_ndigis > 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) int maxdigi = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) *p++ = FAC_NATIONAL_DIGIS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) *p++ = AX25_ADDR_LEN * (rose->source_ndigis + rose->dest_ndigis);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) for (nb = 0 ; nb < rose->source_ndigis ; nb++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (++maxdigi >= ROSE_MAX_DIGIS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) p[6] |= AX25_HBIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) p += AX25_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (++maxdigi >= ROSE_MAX_DIGIS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) p[6] &= ~AX25_HBIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) p += AX25_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) /* For compatibility */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (rose->source_ndigis > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) *p++ = FAC_NATIONAL_SRC_DIGI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) *p++ = AX25_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) p += AX25_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /* For compatibility */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (rose->dest_ndigis > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) *p++ = FAC_NATIONAL_DEST_DIGI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) *p++ = AX25_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) p += AX25_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) *p++ = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) *p++ = FAC_CCITT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) *p++ = FAC_CCITT_DEST_NSAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) callsign = ax2asc(buf, &rose->dest_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) *p++ = strlen(callsign) + 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) *p++ = (strlen(callsign) + 9) * 2; /* ??? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) *p++ = ROSE_ADDR_LEN * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) p += ROSE_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) memcpy(p, callsign, strlen(callsign));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) p += strlen(callsign);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) *p++ = FAC_CCITT_SRC_NSAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) callsign = ax2asc(buf, &rose->source_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) *p++ = strlen(callsign) + 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) *p++ = (strlen(callsign) + 9) * 2; /* ??? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) *p++ = ROSE_ADDR_LEN * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) p += ROSE_ADDR_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) memcpy(p, callsign, strlen(callsign));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) p += strlen(callsign);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) len = p - buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) buffer[0] = len - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) struct rose_sock *rose = rose_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) rose_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) rose_stop_idletimer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) rose_clear_queues(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) rose->lci = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) rose->state = ROSE_STATE_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (cause != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) rose->cause = cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (diagnostic != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) rose->diagnostic = diagnostic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) sk->sk_state = TCP_CLOSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) sk->sk_err = reason;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) sk->sk_shutdown |= SEND_SHUTDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (!sock_flag(sk, SOCK_DEAD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) sock_set_flag(sk, SOCK_DEAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags