[mirror_ubuntu-focal-kernel.git] / net / rxrpc / ar-connevent.c

/* connection-level event handling
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <linux/errqueue.h>
#include <linux/udp.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/icmp.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <net/ip.h>
#include "ar-internal.h"

/*
 * pass a connection-level abort onto all calls on that connection
 */
static void rxrpc_abort_calls(struct rxrpc_connection *conn, int state,
			      u32 abort_code)
{
	struct rxrpc_call *call;
	struct rb_node *p;

	_enter("{%d},%x", conn->debug_id, abort_code);

	read_lock_bh(&conn->lock);

	for (p = rb_first(&conn->calls); p; p = rb_next(p)) {
		call = rb_entry(p, struct rxrpc_call, conn_node);
		write_lock(&call->state_lock);
		if (call->state <= RXRPC_CALL_COMPLETE) {
			call->state = state;
			if (state == RXRPC_CALL_LOCALLY_ABORTED) {
				call->local_abort = conn->local_abort;
				set_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
			} else {
				call->remote_abort = conn->remote_abort;
				set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
			}
			rxrpc_queue_call(call);
		}
		write_unlock(&call->state_lock);
	}

	read_unlock_bh(&conn->lock);
	_leave("");
}

/*
 * generate a connection-level abort
 */
static int rxrpc_abort_connection(struct rxrpc_connection *conn,
				  u32 error, u32 abort_code)
{
	struct rxrpc_wire_header whdr;
	struct msghdr msg;
	struct kvec iov[2];
	__be32 word;
	size_t len;
	u32 serial;
	int ret;

	_enter("%d,,%u,%u", conn->debug_id, error, abort_code);

	/* generate a connection-level abort */
	spin_lock_bh(&conn->state_lock);
	if (conn->state < RXRPC_CONN_REMOTELY_ABORTED) {
		conn->state = RXRPC_CONN_LOCALLY_ABORTED;
		conn->error = error;
		spin_unlock_bh(&conn->state_lock);
	} else {
		spin_unlock_bh(&conn->state_lock);
		_leave(" = 0 [already dead]");
		return 0;
	}

	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code);

	msg.msg_name	= &conn->trans->peer->srx.transport;
	msg.msg_namelen	= conn->trans->peer->srx.transport_len;
	msg.msg_control	= NULL;
	msg.msg_controllen = 0;
	msg.msg_flags	= 0;

	whdr.epoch	= htonl(conn->epoch);
	whdr.cid	= htonl(conn->cid);
	whdr.callNumber	= 0;
	whdr.seq	= 0;
	whdr.type	= RXRPC_PACKET_TYPE_ABORT;
	whdr.flags	= conn->out_clientflag;
	whdr.userStatus	= 0;
	whdr.securityIndex = conn->security_ix;
	whdr._rsvd	= 0;
	whdr.serviceId	= htons(conn->service_id);

	word		= htonl(conn->local_abort);

	iov[0].iov_base	= &whdr;
	iov[0].iov_len	= sizeof(whdr);
	iov[1].iov_base	= &word;
	iov[1].iov_len	= sizeof(word);

	len = iov[0].iov_len + iov[1].iov_len;

	serial = atomic_inc_return(&conn->serial);
	whdr.serial = htonl(serial);
	_proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort);

	ret = kernel_sendmsg(conn->trans->local->socket, &msg, iov, 2, len);
	if (ret < 0) {
		_debug("sendmsg failed: %d", ret);
		return -EAGAIN;
	}

	_leave(" = 0");
	return 0;
}

/*
 * mark a call as being on a now-secured channel
 * - must be called with softirqs disabled
 */
static void rxrpc_call_is_secure(struct rxrpc_call *call)
{
	_enter("%p", call);
	if (call) {
		read_lock(&call->state_lock);
		if (call->state < RXRPC_CALL_COMPLETE &&
		    !test_and_set_bit(RXRPC_CALL_EV_SECURED, &call->events))
			rxrpc_queue_call(call);
		read_unlock(&call->state_lock);
	}
}

/*
 * connection-level Rx packet processor
 */
static int rxrpc_process_event(struct rxrpc_connection *conn,
			       struct sk_buff *skb,
			       u32 *_abort_code)
{
	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
	__be32 wtmp;
	u32 abort_code;
	int loop, ret;

	if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
		kleave(" = -ECONNABORTED [%u]", conn->state);
		return -ECONNABORTED;
	}

	_enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial);

	switch (sp->hdr.type) {
	case RXRPC_PACKET_TYPE_ABORT:
		if (skb_copy_bits(skb, 0, &wtmp, sizeof(wtmp)) < 0)
			return -EPROTO;
		abort_code = ntohl(wtmp);
		_proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code);

		conn->state = RXRPC_CONN_REMOTELY_ABORTED;
		rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED,
				  abort_code);
		return -ECONNABORTED;

	case RXRPC_PACKET_TYPE_CHALLENGE:
		if (conn->security)
			return conn->security->respond_to_challenge(
				conn, skb, _abort_code);
		return -EPROTO;

	case RXRPC_PACKET_TYPE_RESPONSE:
		if (!conn->security)
			return -EPROTO;

		ret = conn->security->verify_response(conn, skb, _abort_code);
		if (ret < 0)
			return ret;

		ret = conn->security->init_connection_security(conn);
		if (ret < 0)
			return ret;

		conn->security->prime_packet_security(conn);
		read_lock_bh(&conn->lock);
		spin_lock(&conn->state_lock);

		if (conn->state == RXRPC_CONN_SERVER_CHALLENGING) {
			conn->state = RXRPC_CONN_SERVER;
			for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
				rxrpc_call_is_secure(conn->channels[loop]);
		}

		spin_unlock(&conn->state_lock);
		read_unlock_bh(&conn->lock);
		return 0;

	default:
		_leave(" = -EPROTO [%u]", sp->hdr.type);
		return -EPROTO;
	}
}

/*
 * set up security and issue a challenge
 */
static void rxrpc_secure_connection(struct rxrpc_connection *conn)
{
	u32 abort_code;
	int ret;

	_enter("{%d}", conn->debug_id);

	ASSERT(conn->security_ix != 0);

	if (!conn->key) {
		_debug("set up security");
		ret = rxrpc_init_server_conn_security(conn);
		switch (ret) {
		case 0:
			break;
		case -ENOENT:
			abort_code = RX_CALL_DEAD;
			goto abort;
		default:
			abort_code = RXKADNOAUTH;
			goto abort;
		}
	}

	ASSERT(conn->security != NULL);

	if (conn->security->issue_challenge(conn) < 0) {
		abort_code = RX_CALL_DEAD;
		ret = -ENOMEM;
		goto abort;
	}

	_leave("");
	return;

abort:
	_debug("abort %d, %d", ret, abort_code);
	rxrpc_abort_connection(conn, -ret, abort_code);
	_leave(" [aborted]");
}

/*
 * connection-level event processor
 */
void rxrpc_process_connection(struct work_struct *work)
{
	struct rxrpc_connection *conn =
		container_of(work, struct rxrpc_connection, processor);
	struct sk_buff *skb;
	u32 abort_code = RX_PROTOCOL_ERROR;
	int ret;

	_enter("{%d}", conn->debug_id);

	atomic_inc(&conn->usage);

	if (test_and_clear_bit(RXRPC_CONN_CHALLENGE, &conn->events)) {
		rxrpc_secure_connection(conn);
		rxrpc_put_connection(conn);
	}

	/* go through the conn-level event packets, releasing the ref on this
	 * connection that each one has when we've finished with it */
	while ((skb = skb_dequeue(&conn->rx_queue))) {
		ret = rxrpc_process_event(conn, skb, &abort_code);
		switch (ret) {
		case -EPROTO:
		case -EKEYEXPIRED:
		case -EKEYREJECTED:
			goto protocol_error;
		case -EAGAIN:
			goto requeue_and_leave;
		case -ECONNABORTED:
		default:
			rxrpc_put_connection(conn);
			rxrpc_free_skb(skb);
			break;
		}
	}

out:
	rxrpc_put_connection(conn);
	_leave("");
	return;

requeue_and_leave:
	skb_queue_head(&conn->rx_queue, skb);
	goto out;

protocol_error:
	if (rxrpc_abort_connection(conn, -ret, abort_code) < 0)
		goto requeue_and_leave;
	rxrpc_put_connection(conn);
	rxrpc_free_skb(skb);
	_leave(" [EPROTO]");
	goto out;
}

/*
 * put a packet up for transport-level abort
 */
void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
{
	CHECK_SLAB_OKAY(&local->usage);

	if (!atomic_inc_not_zero(&local->usage)) {
		printk("resurrected on reject\n");
		BUG();
	}

	skb_queue_tail(&local->reject_queue, skb);
	rxrpc_queue_work(&local->rejecter);
}

/*
 * reject packets through the local endpoint
 */
void rxrpc_reject_packets(struct work_struct *work)
{
	union {
		struct sockaddr sa;
		struct sockaddr_in sin;
	} sa;
	struct rxrpc_skb_priv *sp;
	struct rxrpc_wire_header whdr;
	struct rxrpc_local *local;
	struct sk_buff *skb;
	struct msghdr msg;
	struct kvec iov[2];
	size_t size;
	__be32 code;

	local = container_of(work, struct rxrpc_local, rejecter);
	rxrpc_get_local(local);

	_enter("%d", local->debug_id);

	iov[0].iov_base = &whdr;
	iov[0].iov_len = sizeof(whdr);
	iov[1].iov_base = &code;
	iov[1].iov_len = sizeof(code);
	size = sizeof(whdr) + sizeof(code);

	msg.msg_name = &sa;
	msg.msg_control = NULL;
	msg.msg_controllen = 0;
	msg.msg_flags = 0;

	memset(&sa, 0, sizeof(sa));
	sa.sa.sa_family = local->srx.transport.family;
	switch (sa.sa.sa_family) {
	case AF_INET:
		msg.msg_namelen = sizeof(sa.sin);
		break;
	default:
		msg.msg_namelen = 0;
		break;
	}

	memset(&whdr, 0, sizeof(whdr));
	whdr.type = RXRPC_PACKET_TYPE_ABORT;

	while ((skb = skb_dequeue(&local->reject_queue))) {
		sp = rxrpc_skb(skb);
		switch (sa.sa.sa_family) {
		case AF_INET:
			sa.sin.sin_port = udp_hdr(skb)->source;
			sa.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
			code = htonl(skb->priority);

			whdr.epoch	= htonl(sp->hdr.epoch);
			whdr.cid	= htonl(sp->hdr.cid);
			whdr.callNumber	= htonl(sp->hdr.callNumber);
			whdr.serviceId	= htons(sp->hdr.serviceId);
			whdr.flags	= sp->hdr.flags;
			whdr.flags	^= RXRPC_CLIENT_INITIATED;
			whdr.flags	&= RXRPC_CLIENT_INITIATED;

			kernel_sendmsg(local->socket, &msg, iov, 2, size);
			break;

		default:
			break;
		}

		rxrpc_free_skb(skb);
		rxrpc_put_local(local);
	}

	rxrpc_put_local(local);
	_leave("");
}
Commit	Line	Data
17926a79 DH	1	/* connection-level event handling
	2	*
	3	* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/net.h>
	14	#include <linux/skbuff.h>
	15	#include <linux/errqueue.h>
	16	#include <linux/udp.h>
	17	#include <linux/in.h>
	18	#include <linux/in6.h>
	19	#include <linux/icmp.h>
	20	#include <net/sock.h>
	21	#include <net/af_rxrpc.h>
	22	#include <net/ip.h>
	23	#include "ar-internal.h"
	24
	25	/*
	26	* pass a connection-level abort onto all calls on that connection
	27	*/
	28	static void rxrpc_abort_calls(struct rxrpc_connection *conn, int state,
	29	u32 abort_code)
	30	{
	31	struct rxrpc_call *call;
	32	struct rb_node *p;
	33
	34	_enter("{%d},%x", conn->debug_id, abort_code);
	35
	36	read_lock_bh(&conn->lock);
	37
	38	for (p = rb_first(&conn->calls); p; p = rb_next(p)) {
	39	call = rb_entry(p, struct rxrpc_call, conn_node);
	40	write_lock(&call->state_lock);
	41	if (call->state <= RXRPC_CALL_COMPLETE) {
	42	call->state = state;
dc44b3a0 DH	43	if (state == RXRPC_CALL_LOCALLY_ABORTED) {
dc44b3a0 DH	44	call->local_abort = conn->local_abort;
4c198ad1	45	set_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
dc44b3a0 DH	46	} else {
dc44b3a0 DH	47	call->remote_abort = conn->remote_abort;
4c198ad1	48	set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
dc44b3a0	49	}
651350d1	50	rxrpc_queue_call(call);
17926a79 DH	51	}
	52	write_unlock(&call->state_lock);
	53	}
	54
	55	read_unlock_bh(&conn->lock);
	56	_leave("");
	57	}
	58
	59	/*
	60	* generate a connection-level abort
	61	*/
	62	static int rxrpc_abort_connection(struct rxrpc_connection *conn,
	63	u32 error, u32 abort_code)
	64	{
0d12f8a4	65	struct rxrpc_wire_header whdr;
17926a79 DH	66	struct msghdr msg;
	67	struct kvec iov[2];
	68	__be32 word;
	69	size_t len;
0d12f8a4	70	u32 serial;
17926a79 DH	71	int ret;
	72
	73	_enter("%d,,%u,%u", conn->debug_id, error, abort_code);
	74
	75	/* generate a connection-level abort */
	76	spin_lock_bh(&conn->state_lock);
	77	if (conn->state < RXRPC_CONN_REMOTELY_ABORTED) {
	78	conn->state = RXRPC_CONN_LOCALLY_ABORTED;
	79	conn->error = error;
	80	spin_unlock_bh(&conn->state_lock);
	81	} else {
	82	spin_unlock_bh(&conn->state_lock);
	83	_leave(" = 0 [already dead]");
	84	return 0;
	85	}
	86
	87	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code);
	88
6dd050f8 DH	89	msg.msg_name = &conn->trans->peer->srx.transport;
6dd050f8 DH	90	msg.msg_namelen = conn->trans->peer->srx.transport_len;
17926a79 DH	91	msg.msg_control = NULL;
	92	msg.msg_controllen = 0;
	93	msg.msg_flags = 0;
	94
0d12f8a4 DH	95	whdr.epoch = htonl(conn->epoch);
	96	whdr.cid = htonl(conn->cid);
	97	whdr.callNumber = 0;
	98	whdr.seq = 0;
	99	whdr.type = RXRPC_PACKET_TYPE_ABORT;
	100	whdr.flags = conn->out_clientflag;
	101	whdr.userStatus = 0;
	102	whdr.securityIndex = conn->security_ix;
	103	whdr._rsvd = 0;
	104	whdr.serviceId = htons(conn->service_id);
17926a79	105
dc44b3a0	106	word = htonl(conn->local_abort);
17926a79	107
0d12f8a4 DH	108	iov[0].iov_base = &whdr;
0d12f8a4 DH	109	iov[0].iov_len = sizeof(whdr);
17926a79 DH	110	iov[1].iov_base = &word;
	111	iov[1].iov_len = sizeof(word);
	112
	113	len = iov[0].iov_len + iov[1].iov_len;
	114
0d12f8a4 DH	115	serial = atomic_inc_return(&conn->serial);
0d12f8a4 DH	116	whdr.serial = htonl(serial);
dc44b3a0	117	_proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort);
17926a79 DH	118
	119	ret = kernel_sendmsg(conn->trans->local->socket, &msg, iov, 2, len);
	120	if (ret < 0) {
	121	_debug("sendmsg failed: %d", ret);
	122	return -EAGAIN;
	123	}
	124
	125	_leave(" = 0");
	126	return 0;
	127	}
	128
	129	/*
	130	* mark a call as being on a now-secured channel
	131	* - must be called with softirqs disabled
	132	*/
5eaa65b2	133	static void rxrpc_call_is_secure(struct rxrpc_call *call)
17926a79 DH	134	{
	135	_enter("%p", call);
	136	if (call) {
	137	read_lock(&call->state_lock);
	138	if (call->state < RXRPC_CALL_COMPLETE &&
4c198ad1	139	!test_and_set_bit(RXRPC_CALL_EV_SECURED, &call->events))
651350d1	140	rxrpc_queue_call(call);
17926a79 DH	141	read_unlock(&call->state_lock);
	142	}
	143	}
	144
	145	/*
	146	* connection-level Rx packet processor
	147	*/
	148	static int rxrpc_process_event(struct rxrpc_connection *conn,
	149	struct sk_buff *skb,
	150	u32 *_abort_code)
	151	{
	152	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
0d12f8a4 DH	153	__be32 wtmp;
0d12f8a4 DH	154	u32 abort_code;
17926a79 DH	155	int loop, ret;
17926a79 DH	156
519d2567 DH	157	if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
519d2567 DH	158	kleave(" = -ECONNABORTED [%u]", conn->state);
17926a79	159	return -ECONNABORTED;
519d2567	160	}
17926a79	161
0d12f8a4	162	_enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial);
519d2567	163
17926a79 DH	164	switch (sp->hdr.type) {
17926a79 DH	165	case RXRPC_PACKET_TYPE_ABORT:
0d12f8a4	166	if (skb_copy_bits(skb, 0, &wtmp, sizeof(wtmp)) < 0)
17926a79	167	return -EPROTO;
0d12f8a4 DH	168	abort_code = ntohl(wtmp);
0d12f8a4 DH	169	_proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code);
17926a79 DH	170
	171	conn->state = RXRPC_CONN_REMOTELY_ABORTED;
	172	rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED,
0d12f8a4	173	abort_code);
17926a79 DH	174	return -ECONNABORTED;
	175
	176	case RXRPC_PACKET_TYPE_CHALLENGE:
	177	if (conn->security)
	178	return conn->security->respond_to_challenge(
	179	conn, skb, _abort_code);
	180	return -EPROTO;
	181
	182	case RXRPC_PACKET_TYPE_RESPONSE:
	183	if (!conn->security)
	184	return -EPROTO;
	185
	186	ret = conn->security->verify_response(conn, skb, _abort_code);
	187	if (ret < 0)
	188	return ret;
	189
	190	ret = conn->security->init_connection_security(conn);
	191	if (ret < 0)
	192	return ret;
	193
	194	conn->security->prime_packet_security(conn);
	195	read_lock_bh(&conn->lock);
	196	spin_lock(&conn->state_lock);
	197
	198	if (conn->state == RXRPC_CONN_SERVER_CHALLENGING) {
	199	conn->state = RXRPC_CONN_SERVER;
	200	for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
	201	rxrpc_call_is_secure(conn->channels[loop]);
	202	}
	203
	204	spin_unlock(&conn->state_lock);
	205	read_unlock_bh(&conn->lock);
	206	return 0;
	207
	208	default:
519d2567	209	_leave(" = -EPROTO [%u]", sp->hdr.type);
17926a79 DH	210	return -EPROTO;
	211	}
	212	}
	213
	214	/*
	215	* set up security and issue a challenge
	216	*/
	217	static void rxrpc_secure_connection(struct rxrpc_connection *conn)
	218	{
	219	u32 abort_code;
	220	int ret;
	221
	222	_enter("{%d}", conn->debug_id);
	223
	224	ASSERT(conn->security_ix != 0);
	225
	226	if (!conn->key) {
	227	_debug("set up security");
	228	ret = rxrpc_init_server_conn_security(conn);
	229	switch (ret) {
	230	case 0:
	231	break;
	232	case -ENOENT:
	233	abort_code = RX_CALL_DEAD;
	234	goto abort;
	235	default:
	236	abort_code = RXKADNOAUTH;
	237	goto abort;
	238	}
	239	}
	240
	241	ASSERT(conn->security != NULL);
	242
	243	if (conn->security->issue_challenge(conn) < 0) {
	244	abort_code = RX_CALL_DEAD;
	245	ret = -ENOMEM;
	246	goto abort;
	247	}
	248
	249	_leave("");
	250	return;
	251
	252	abort:
	253	_debug("abort %d, %d", ret, abort_code);
	254	rxrpc_abort_connection(conn, -ret, abort_code);
	255	_leave(" [aborted]");
	256	}
	257
	258	/*
	259	* connection-level event processor
	260	*/
	261	void rxrpc_process_connection(struct work_struct *work)
	262	{
	263	struct rxrpc_connection *conn =
	264	container_of(work, struct rxrpc_connection, processor);
17926a79 DH	265	struct sk_buff *skb;
	266	u32 abort_code = RX_PROTOCOL_ERROR;
	267	int ret;
	268
	269	_enter("{%d}", conn->debug_id);
	270
	271	atomic_inc(&conn->usage);
	272
	273	if (test_and_clear_bit(RXRPC_CONN_CHALLENGE, &conn->events)) {
	274	rxrpc_secure_connection(conn);
	275	rxrpc_put_connection(conn);
	276	}
	277
	278	/* go through the conn-level event packets, releasing the ref on this
	279	* connection that each one has when we've finished with it */
	280	while ((skb = skb_dequeue(&conn->rx_queue))) {
17926a79 DH	281	ret = rxrpc_process_event(conn, skb, &abort_code);
	282	switch (ret) {
	283	case -EPROTO:
	284	case -EKEYEXPIRED:
	285	case -EKEYREJECTED:
	286	goto protocol_error;
	287	case -EAGAIN:
	288	goto requeue_and_leave;
	289	case -ECONNABORTED:
	290	default:
	291	rxrpc_put_connection(conn);
	292	rxrpc_free_skb(skb);
	293	break;
	294	}
	295	}
	296
	297	out:
	298	rxrpc_put_connection(conn);
	299	_leave("");
	300	return;
	301
	302	requeue_and_leave:
	303	skb_queue_head(&conn->rx_queue, skb);
	304	goto out;
	305
	306	protocol_error:
	307	if (rxrpc_abort_connection(conn, -ret, abort_code) < 0)
	308	goto requeue_and_leave;
	309	rxrpc_put_connection(conn);
	310	rxrpc_free_skb(skb);
	311	_leave(" [EPROTO]");
	312	goto out;
	313	}
	314
651350d1 DH	315	/*
	316	* put a packet up for transport-level abort
	317	*/
	318	void rxrpc_reject_packet(struct rxrpc_local local, struct sk_buff skb)
	319	{
	320	CHECK_SLAB_OKAY(&local->usage);
	321
	322	if (!atomic_inc_not_zero(&local->usage)) {
	323	printk("resurrected on reject\n");
	324	BUG();
	325	}
	326
	327	skb_queue_tail(&local->reject_queue, skb);
	328	rxrpc_queue_work(&local->rejecter);
	329	}
	330
17926a79 DH	331	/*
	332	* reject packets through the local endpoint
	333	*/
	334	void rxrpc_reject_packets(struct work_struct *work)
	335	{
	336	union {
	337	struct sockaddr sa;
	338	struct sockaddr_in sin;
	339	} sa;
	340	struct rxrpc_skb_priv *sp;
0d12f8a4	341	struct rxrpc_wire_header whdr;
17926a79 DH	342	struct rxrpc_local *local;
	343	struct sk_buff *skb;
	344	struct msghdr msg;
	345	struct kvec iov[2];
	346	size_t size;
	347	__be32 code;
	348
	349	local = container_of(work, struct rxrpc_local, rejecter);
	350	rxrpc_get_local(local);
	351
	352	_enter("%d", local->debug_id);
	353
0d12f8a4 DH	354	iov[0].iov_base = &whdr;
0d12f8a4 DH	355	iov[0].iov_len = sizeof(whdr);
17926a79 DH	356	iov[1].iov_base = &code;
17926a79 DH	357	iov[1].iov_len = sizeof(code);
0d12f8a4	358	size = sizeof(whdr) + sizeof(code);
17926a79 DH	359
	360	msg.msg_name = &sa;
	361	msg.msg_control = NULL;
	362	msg.msg_controllen = 0;
	363	msg.msg_flags = 0;
	364
	365	memset(&sa, 0, sizeof(sa));
	366	sa.sa.sa_family = local->srx.transport.family;
	367	switch (sa.sa.sa_family) {
	368	case AF_INET:
	369	msg.msg_namelen = sizeof(sa.sin);
	370	break;
	371	default:
	372	msg.msg_namelen = 0;
	373	break;
	374	}
	375
0d12f8a4 DH	376	memset(&whdr, 0, sizeof(whdr));
0d12f8a4 DH	377	whdr.type = RXRPC_PACKET_TYPE_ABORT;
17926a79 DH	378
	379	while ((skb = skb_dequeue(&local->reject_queue))) {
	380	sp = rxrpc_skb(skb);
	381	switch (sa.sa.sa_family) {
	382	case AF_INET:
	383	sa.sin.sin_port = udp_hdr(skb)->source;
	384	sa.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
	385	code = htonl(skb->priority);
	386
0d12f8a4 DH	387	whdr.epoch = htonl(sp->hdr.epoch);
	388	whdr.cid = htonl(sp->hdr.cid);
	389	whdr.callNumber = htonl(sp->hdr.callNumber);
	390	whdr.serviceId = htons(sp->hdr.serviceId);
	391	whdr.flags = sp->hdr.flags;
	392	whdr.flags ^= RXRPC_CLIENT_INITIATED;
	393	whdr.flags &= RXRPC_CLIENT_INITIATED;
17926a79 DH	394
	395	kernel_sendmsg(local->socket, &msg, iov, 2, size);
	396	break;
	397
	398	default:
	399	break;
	400	}
	401
	402	rxrpc_free_skb(skb);
	403	rxrpc_put_local(local);
	404	}
	405
	406	rxrpc_put_local(local);
	407	_leave("");
	408	}