^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) * X.25 Packet Layer release 002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This is ALPHA test software. This code may break your machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * randomly fail to work with new releases, misbehave and/or generally
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * screw up. It might even work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This code REQUIRES 2.1.15 or higher
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * History
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * X.25 001 Jonathan Naylor Started coding.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * X.25 002 Jonathan Naylor Centralised disconnection code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * New timer architecture.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * 2000-03-20 Daniela Squassoni Disabling/enabling of facilities
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * negotiation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * 2000-11-10 Henner Eisen Check and reset for out-of-sequence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * i-frames.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define pr_fmt(fmt) "X25: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <net/tcp_states.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <net/x25.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int x25_queue_rx_frame(struct sock *sk, struct sk_buff *skb, int more)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct sk_buff *skbo, *skbn = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (more) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) x25->fraglen += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) skb_queue_tail(&x25->fragment_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) skb_set_owner_r(skb, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!more && x25->fraglen > 0) { /* End of fragment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int len = x25->fraglen + skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if ((skbn = alloc_skb(len, GFP_ATOMIC)) == NULL){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) skb_queue_tail(&x25->fragment_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) skb_reset_transport_header(skbn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) skbo = skb_dequeue(&x25->fragment_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) skb_copy_from_linear_data(skbo, skb_put(skbn, skbo->len),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) skbo->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) kfree_skb(skbo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) while ((skbo =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) skb_dequeue(&x25->fragment_queue)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) skb_pull(skbo, (x25->neighbour->extended) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) skb_copy_from_linear_data(skbo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) skb_put(skbn, skbo->len),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) skbo->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) kfree_skb(skbo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) x25->fraglen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) skb_set_owner_r(skbn, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) skb_queue_tail(&sk->sk_receive_queue, skbn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (!sock_flag(sk, SOCK_DEAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) sk->sk_data_ready(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * State machine for state 1, Awaiting Call Accepted State.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * The handling of the timer(s) is in file x25_timer.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * Handling of state 0 and connection release is in af_x25.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int x25_state1_machine(struct sock *sk, struct sk_buff *skb, int frametype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct x25_address source_addr, dest_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) case X25_CALL_ACCEPTED: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) x25_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) x25->condition = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) x25->vs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) x25->va = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) x25->vr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) x25->vl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) x25->state = X25_STATE_3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) sk->sk_state = TCP_ESTABLISHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * Parse the data in the frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) skb_pull(skb, X25_STD_MIN_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) len = x25_parse_address_block(skb, &source_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) &dest_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (len > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) skb_pull(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) else if (len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) len = x25_parse_facilities(skb, &x25->facilities,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) &x25->dte_facilities,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) &x25->vc_facil_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (len > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) skb_pull(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) else if (len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * Copy any Call User Data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (skb->len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (skb->len > X25_MAX_CUD_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) skb_copy_bits(skb, 0, x25->calluserdata.cuddata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) x25->calluserdata.cudlength = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (!sock_flag(sk, SOCK_DEAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) case X25_CALL_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* call collision */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) x25->causediag.cause = 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) x25->causediag.diagnostic = 0x48;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) x25_write_internal(sk, X25_CLEAR_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) x25_disconnect(sk, EISCONN, 0x01, 0x48);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) case X25_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) x25_write_internal(sk, X25_CLEAR_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) x25_disconnect(sk, ECONNREFUSED, skb->data[3], skb->data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) out_clear:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) x25_write_internal(sk, X25_CLEAR_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) x25->state = X25_STATE_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) x25_start_t23timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * State machine for state 2, Awaiting Clear Confirmation State.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * The handling of the timer(s) is in file x25_timer.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * Handling of state 0 and connection release is in af_x25.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static int x25_state2_machine(struct sock *sk, struct sk_buff *skb, int frametype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) case X25_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) x25_write_internal(sk, X25_CLEAR_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) x25_disconnect(sk, 0, skb->data[3], skb->data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) case X25_CLEAR_CONFIRMATION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) x25_disconnect(sk, 0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) out_clear:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) x25_write_internal(sk, X25_CLEAR_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) x25_start_t23timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * State machine for state 3, Connected State.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * The handling of the timer(s) is in file x25_timer.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * Handling of state 0 and connection release is in af_x25.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static int x25_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype, int ns, int nr, int q, int d, int m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) int queued = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) int modulus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) modulus = (x25->neighbour->extended) ? X25_EMODULUS : X25_SMODULUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) case X25_RESET_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) x25_write_internal(sk, X25_RESET_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) x25_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) x25->condition = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) x25->vs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) x25->vr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) x25->va = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) x25->vl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) x25_requeue_frames(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) case X25_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) x25_write_internal(sk, X25_CLEAR_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) x25_disconnect(sk, 0, skb->data[3], skb->data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) case X25_RR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) case X25_RNR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (!x25_validate_nr(sk, nr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) x25_clear_queues(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) x25_write_internal(sk, X25_RESET_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) x25_start_t22timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) x25->condition = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) x25->vs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) x25->vr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) x25->va = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) x25->vl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) x25->state = X25_STATE_4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) x25_frames_acked(sk, nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (frametype == X25_RNR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) x25->condition |= X25_COND_PEER_RX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) x25->condition &= ~X25_COND_PEER_RX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) case X25_DATA: /* XXX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) x25->condition &= ~X25_COND_PEER_RX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if ((ns != x25->vr) || !x25_validate_nr(sk, nr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) x25_clear_queues(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) x25_write_internal(sk, X25_RESET_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) x25_start_t22timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) x25->condition = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) x25->vs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) x25->vr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) x25->va = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) x25->vl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) x25->state = X25_STATE_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) x25_frames_acked(sk, nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (ns == x25->vr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (x25_queue_rx_frame(sk, skb, m) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) x25->vr = (x25->vr + 1) % modulus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) queued = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /* Should never happen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) x25_clear_queues(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) x25_write_internal(sk, X25_RESET_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) x25_start_t22timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) x25->condition = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) x25->vs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) x25->vr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) x25->va = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) x25->vl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) x25->state = X25_STATE_4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (atomic_read(&sk->sk_rmem_alloc) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) (sk->sk_rcvbuf >> 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) x25->condition |= X25_COND_OWN_RX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * If the window is full Ack it immediately, else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * start the holdback timer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (((x25->vl + x25->facilities.winsize_in) % modulus) == x25->vr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) x25->condition &= ~X25_COND_ACK_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) x25_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) x25_enquiry_response(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) x25->condition |= X25_COND_ACK_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) x25_start_t2timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) case X25_INTERRUPT_CONFIRMATION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) clear_bit(X25_INTERRUPT_FLAG, &x25->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) case X25_INTERRUPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (sock_flag(sk, SOCK_URGINLINE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) queued = !sock_queue_rcv_skb(sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) skb_set_owner_r(skb, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) skb_queue_tail(&x25->interrupt_in_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) queued = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) sk_send_sigurg(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) x25_write_internal(sk, X25_INTERRUPT_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) pr_warn("unknown %02X in state 3\n", frametype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return queued;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) out_clear:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) x25_write_internal(sk, X25_CLEAR_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) x25->state = X25_STATE_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) x25_start_t23timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * State machine for state 4, Awaiting Reset Confirmation State.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * The handling of the timer(s) is in file x25_timer.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * Handling of state 0 and connection release is in af_x25.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) static int x25_state4_machine(struct sock *sk, struct sk_buff *skb, int frametype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) case X25_RESET_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) x25_write_internal(sk, X25_RESET_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) case X25_RESET_CONFIRMATION: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) x25_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) x25->condition = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) x25->va = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) x25->vr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) x25->vs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) x25->vl = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) x25->state = X25_STATE_3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) x25_requeue_frames(sk);
^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 X25_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) goto out_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) x25_write_internal(sk, X25_CLEAR_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) x25_disconnect(sk, 0, skb->data[3], skb->data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) out_clear:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) x25_write_internal(sk, X25_CLEAR_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) x25->state = X25_STATE_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) x25_start_t23timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) * State machine for state 5, Call Accepted / Call Connected pending (X25_ACCPT_APPRV_FLAG).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * The handling of the timer(s) is in file x25_timer.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * Handling of state 0 and connection release is in af_x25.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int x25_state5_machine(struct sock *sk, struct sk_buff *skb, int frametype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) switch (frametype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) case X25_CLEAR_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) x25_write_internal(sk, X25_CLEAR_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) x25->state = X25_STATE_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) x25_start_t23timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) x25_write_internal(sk, X25_CLEAR_CONFIRMATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) x25_disconnect(sk, 0, skb->data[3], skb->data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /* Higher level upcall for a LAPB frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) int x25_process_rx_frame(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) int queued = 0, frametype, ns, nr, q, d, m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (x25->state == X25_STATE_0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) frametype = x25_decode(sk, skb, &ns, &nr, &q, &d, &m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) switch (x25->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) case X25_STATE_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) queued = x25_state1_machine(sk, skb, frametype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) case X25_STATE_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) queued = x25_state2_machine(sk, skb, frametype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) case X25_STATE_3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) queued = x25_state3_machine(sk, skb, frametype, ns, nr, q, d, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) case X25_STATE_4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) queued = x25_state4_machine(sk, skb, frametype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) case X25_STATE_5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) queued = x25_state5_machine(sk, skb, frametype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) x25_kick(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return queued;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) int x25_backlog_rcv(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int queued = x25_process_rx_frame(sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (!queued)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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