[deliverable/linux.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:
		return conn->security->respond_to_challenge(conn, skb,
							    _abort_code);

	case RXRPC_PACKET_TYPE_RESPONSE:
		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;
		}
	}

	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:
e0e4d82f DH	177	return conn->security->respond_to_challenge(conn, skb,
e0e4d82f DH	178	_abort_code);
17926a79 DH	179
17926a79 DH	180	case RXRPC_PACKET_TYPE_RESPONSE:
17926a79 DH	181	ret = conn->security->verify_response(conn, skb, _abort_code);
	182	if (ret < 0)
	183	return ret;
	184
	185	ret = conn->security->init_connection_security(conn);
	186	if (ret < 0)
	187	return ret;
	188
	189	conn->security->prime_packet_security(conn);
	190	read_lock_bh(&conn->lock);
	191	spin_lock(&conn->state_lock);
	192
	193	if (conn->state == RXRPC_CONN_SERVER_CHALLENGING) {
	194	conn->state = RXRPC_CONN_SERVER;
	195	for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
	196	rxrpc_call_is_secure(conn->channels[loop]);
	197	}
	198
	199	spin_unlock(&conn->state_lock);
	200	read_unlock_bh(&conn->lock);
	201	return 0;
	202
	203	default:
519d2567	204	_leave(" = -EPROTO [%u]", sp->hdr.type);
17926a79 DH	205	return -EPROTO;
	206	}
	207	}
	208
	209	/*
	210	* set up security and issue a challenge
	211	*/
	212	static void rxrpc_secure_connection(struct rxrpc_connection *conn)
	213	{
	214	u32 abort_code;
	215	int ret;
	216
	217	_enter("{%d}", conn->debug_id);
	218
	219	ASSERT(conn->security_ix != 0);
	220
	221	if (!conn->key) {
	222	_debug("set up security");
	223	ret = rxrpc_init_server_conn_security(conn);
	224	switch (ret) {
	225	case 0:
	226	break;
	227	case -ENOENT:
	228	abort_code = RX_CALL_DEAD;
	229	goto abort;
	230	default:
	231	abort_code = RXKADNOAUTH;
	232	goto abort;
	233	}
	234	}
	235
17926a79 DH	236	if (conn->security->issue_challenge(conn) < 0) {
	237	abort_code = RX_CALL_DEAD;
	238	ret = -ENOMEM;
	239	goto abort;
	240	}
	241
	242	_leave("");
	243	return;
	244
	245	abort:
	246	_debug("abort %d, %d", ret, abort_code);
	247	rxrpc_abort_connection(conn, -ret, abort_code);
	248	_leave(" [aborted]");
	249	}
	250
	251	/*
	252	* connection-level event processor
	253	*/
	254	void rxrpc_process_connection(struct work_struct *work)
	255	{
	256	struct rxrpc_connection *conn =
	257	container_of(work, struct rxrpc_connection, processor);
17926a79 DH	258	struct sk_buff *skb;
	259	u32 abort_code = RX_PROTOCOL_ERROR;
	260	int ret;
	261
	262	_enter("{%d}", conn->debug_id);
	263
	264	atomic_inc(&conn->usage);
	265
	266	if (test_and_clear_bit(RXRPC_CONN_CHALLENGE, &conn->events)) {
	267	rxrpc_secure_connection(conn);
	268	rxrpc_put_connection(conn);
	269	}
	270
	271	/* go through the conn-level event packets, releasing the ref on this
	272	* connection that each one has when we've finished with it */
	273	while ((skb = skb_dequeue(&conn->rx_queue))) {
17926a79 DH	274	ret = rxrpc_process_event(conn, skb, &abort_code);
	275	switch (ret) {
	276	case -EPROTO:
	277	case -EKEYEXPIRED:
	278	case -EKEYREJECTED:
	279	goto protocol_error;
	280	case -EAGAIN:
	281	goto requeue_and_leave;
	282	case -ECONNABORTED:
	283	default:
	284	rxrpc_put_connection(conn);
	285	rxrpc_free_skb(skb);
	286	break;
	287	}
	288	}
	289
	290	out:
	291	rxrpc_put_connection(conn);
	292	_leave("");
	293	return;
	294
	295	requeue_and_leave:
	296	skb_queue_head(&conn->rx_queue, skb);
	297	goto out;
	298
	299	protocol_error:
	300	if (rxrpc_abort_connection(conn, -ret, abort_code) < 0)
	301	goto requeue_and_leave;
	302	rxrpc_put_connection(conn);
	303	rxrpc_free_skb(skb);
	304	_leave(" [EPROTO]");
	305	goto out;
	306	}
	307
651350d1 DH	308	/*
	309	* put a packet up for transport-level abort
	310	*/
	311	void rxrpc_reject_packet(struct rxrpc_local local, struct sk_buff skb)
	312	{
	313	CHECK_SLAB_OKAY(&local->usage);
	314
	315	if (!atomic_inc_not_zero(&local->usage)) {
	316	printk("resurrected on reject\n");
	317	BUG();
	318	}
	319
	320	skb_queue_tail(&local->reject_queue, skb);
	321	rxrpc_queue_work(&local->rejecter);
	322	}
	323
17926a79 DH	324	/*
	325	* reject packets through the local endpoint
	326	*/
	327	void rxrpc_reject_packets(struct work_struct *work)
	328	{
	329	union {
	330	struct sockaddr sa;
	331	struct sockaddr_in sin;
	332	} sa;
	333	struct rxrpc_skb_priv *sp;
0d12f8a4	334	struct rxrpc_wire_header whdr;
17926a79 DH	335	struct rxrpc_local *local;
	336	struct sk_buff *skb;
	337	struct msghdr msg;
	338	struct kvec iov[2];
	339	size_t size;
	340	__be32 code;
	341
	342	local = container_of(work, struct rxrpc_local, rejecter);
	343	rxrpc_get_local(local);
	344
	345	_enter("%d", local->debug_id);
	346
0d12f8a4 DH	347	iov[0].iov_base = &whdr;
0d12f8a4 DH	348	iov[0].iov_len = sizeof(whdr);
17926a79 DH	349	iov[1].iov_base = &code;
17926a79 DH	350	iov[1].iov_len = sizeof(code);
0d12f8a4	351	size = sizeof(whdr) + sizeof(code);
17926a79 DH	352
	353	msg.msg_name = &sa;
	354	msg.msg_control = NULL;
	355	msg.msg_controllen = 0;
	356	msg.msg_flags = 0;
	357
	358	memset(&sa, 0, sizeof(sa));
	359	sa.sa.sa_family = local->srx.transport.family;
	360	switch (sa.sa.sa_family) {
	361	case AF_INET:
	362	msg.msg_namelen = sizeof(sa.sin);
	363	break;
	364	default:
	365	msg.msg_namelen = 0;
	366	break;
	367	}
	368
0d12f8a4 DH	369	memset(&whdr, 0, sizeof(whdr));
0d12f8a4 DH	370	whdr.type = RXRPC_PACKET_TYPE_ABORT;
17926a79 DH	371
	372	while ((skb = skb_dequeue(&local->reject_queue))) {
	373	sp = rxrpc_skb(skb);
	374	switch (sa.sa.sa_family) {
	375	case AF_INET:
	376	sa.sin.sin_port = udp_hdr(skb)->source;
	377	sa.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
	378	code = htonl(skb->priority);
	379
0d12f8a4 DH	380	whdr.epoch = htonl(sp->hdr.epoch);
	381	whdr.cid = htonl(sp->hdr.cid);
	382	whdr.callNumber = htonl(sp->hdr.callNumber);
	383	whdr.serviceId = htons(sp->hdr.serviceId);
	384	whdr.flags = sp->hdr.flags;
	385	whdr.flags ^= RXRPC_CLIENT_INITIATED;
	386	whdr.flags &= RXRPC_CLIENT_INITIATED;
17926a79 DH	387
	388	kernel_sendmsg(local->socket, &msg, iov, 2, size);
	389	break;
	390
	391	default:
	392	break;
	393	}
	394
	395	rxrpc_free_skb(skb);
	396	rxrpc_put_local(local);
	397	}
	398
	399	rxrpc_put_local(local);
	400	_leave("");
	401	}