Orange Pi5 kernel

^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	New timer architecture.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *	2000-09-04	Henner Eisen	Prevented x25_output() skb leakage.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *	2000-10-27	Henner Eisen	MSG_DONTWAIT for fragment allocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *	2000-11-10	Henner Eisen	x25_send_iframe(): re-queued frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *					needed cleaned seq-number fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <net/x25.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) static int x25_pacsize_to_bytes(unsigned int pacsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	int bytes = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (!pacsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		return 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	while (pacsize-- > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		bytes *= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *	This is where all X.25 information frames pass.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  *      Returns the amount of user data bytes sent on success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  *      or a negative error code on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) int x25_output(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct sk_buff *skbn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	unsigned char header[X25_EXT_MIN_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	int err, frontlen, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	int sent=0, noblock = X25_SKB_CB(skb)->flags & MSG_DONTWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	int header_len = x25->neighbour->extended ? X25_EXT_MIN_LEN :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 						    X25_STD_MIN_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	int max_len = x25_pacsize_to_bytes(x25->facilities.pacsize_out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	if (skb->len - header_len > max_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		/* Save a copy of the Header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		skb_copy_from_linear_data(skb, header, header_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		skb_pull(skb, header_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		frontlen = skb_headroom(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		while (skb->len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			skbn = sock_alloc_send_skb(sk, frontlen + max_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 						   noblock, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			if (!skbn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 				if (err == -EWOULDBLOCK && noblock){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 					kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 					return sent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 				SOCK_DEBUG(sk, "x25_output: fragment alloc"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 					       " failed, err=%d, %d bytes "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 					       "sent\n", err, sent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 				return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			skb_reserve(skbn, frontlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			len = max_len > skb->len ? skb->len : max_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			/* Copy the user data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			skb_pull(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			/* Duplicate the Header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			skb_push(skbn, header_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			skb_copy_to_linear_data(skbn, header, header_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			if (skb->len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				if (x25->neighbour->extended)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 					skbn->data[3] |= X25_EXT_M_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 					skbn->data[2] |= X25_STD_M_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			skb_queue_tail(&sk->sk_write_queue, skbn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 			sent += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		skb_queue_tail(&sk->sk_write_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		sent = skb->len - header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	return sent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  *	This procedure is passed a buffer descriptor for an iframe. It builds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  *	the rest of the control part of the frame and then writes it out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static void x25_send_iframe(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (x25->neighbour->extended) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		skb->data[2]  = (x25->vs << 1) & 0xFE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		skb->data[3] &= X25_EXT_M_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		skb->data[3] |= (x25->vr << 1) & 0xFE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		skb->data[2] &= X25_STD_M_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		skb->data[2] |= (x25->vs << 1) & 0x0E;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		skb->data[2] |= (x25->vr << 5) & 0xE0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	x25_transmit_link(skb, x25->neighbour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) void x25_kick(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct sk_buff *skb, *skbn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	unsigned short start, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	int modulus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (x25->state != X25_STATE_3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	 *	Transmit interrupt data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	if (skb_peek(&x25->interrupt_out_queue) != NULL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		!test_and_set_bit(X25_INTERRUPT_FLAG, &x25->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		skb = skb_dequeue(&x25->interrupt_out_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		x25_transmit_link(skb, x25->neighbour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (x25->condition & X25_COND_PEER_RX_BUSY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (!skb_peek(&sk->sk_write_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	start   = skb_peek(&x25->ack_queue) ? x25->vs : x25->va;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	end     = (x25->va + x25->facilities.winsize_out) % modulus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (start == end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	x25->vs = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	 * Transmit data until either we're out of data to send or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	 * the window is full.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	skb = skb_dequeue(&sk->sk_write_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			skb_queue_head(&sk->sk_write_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		skb_set_owner_w(skbn, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		 * Transmit the frame copy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		x25_send_iframe(sk, skbn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		x25->vs = (x25->vs + 1) % modulus;
^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) 		 * Requeue the original data frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		skb_queue_tail(&x25->ack_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	} while (x25->vs != end &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		 (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	x25->vl         = x25->vr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	x25->condition &= ~X25_COND_ACK_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	x25_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)  * The following routines are taken from page 170 of the 7th ARRL Computer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)  * Networking Conference paper, as is the whole state machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) void x25_enquiry_response(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	struct x25_sock *x25 = x25_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (x25->condition & X25_COND_OWN_RX_BUSY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		x25_write_internal(sk, X25_RNR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		x25_write_internal(sk, X25_RR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	x25->vl         = x25->vr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	x25->condition &= ~X25_COND_ACK_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	x25_stop_timer(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }