[deliverable/linux.git] / net / rxrpc / conn_event.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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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;
	int i;

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

	spin_lock(&conn->channel_lock);

	for (i = 0; i < RXRPC_MAXCALLS; i++) {
		call = rcu_dereference_protected(
			conn->channels[i].call,
			lockdep_is_held(&conn->channel_lock));
		write_lock_bh(&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_bh(&call->state_lock);
	}

	spin_unlock(&conn->channel_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->params.peer->srx.transport;
	msg.msg_namelen	= conn->params.peer->srx.transport_len;
	msg.msg_control	= NULL;
	msg.msg_controllen = 0;
	msg.msg_flags	= 0;

	whdr.epoch	= htonl(conn->proto.epoch);
	whdr.cid	= htonl(conn->proto.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->params.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->params.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;

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

		spin_lock(&conn->channel_lock);
		spin_lock(&conn->state_lock);

		if (conn->state == RXRPC_CONN_SERVICE_CHALLENGING) {
			conn->state = RXRPC_CONN_SERVICE;
			for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
				rxrpc_call_is_secure(
					rcu_dereference_protected(
						conn->channels[loop].call,
						lockdep_is_held(&conn->channel_lock)));
		}

		spin_unlock(&conn->state_lock);
		spin_unlock(&conn->channel_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->params.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);

	if (test_and_clear_bit(RXRPC_CONN_EV_CHALLENGE, &conn->events))
		rxrpc_secure_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_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_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);

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

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

	_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);
	}

	_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
9b6d5398 JP	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9b6d5398 JP	13
17926a79 DH	14	#include <linux/module.h>
	15	#include <linux/net.h>
	16	#include <linux/skbuff.h>
	17	#include <linux/errqueue.h>
	18	#include <linux/udp.h>
	19	#include <linux/in.h>
	20	#include <linux/in6.h>
	21	#include <linux/icmp.h>
	22	#include <net/sock.h>
	23	#include <net/af_rxrpc.h>
	24	#include <net/ip.h>
	25	#include "ar-internal.h"
	26
	27	/*
	28	* pass a connection-level abort onto all calls on that connection
	29	*/
	30	static void rxrpc_abort_calls(struct rxrpc_connection *conn, int state,
	31	u32 abort_code)
	32	{
	33	struct rxrpc_call *call;
a1399f8b	34	int i;
17926a79 DH	35
	36	_enter("{%d},%x", conn->debug_id, abort_code);
	37
a1399f8b	38	spin_lock(&conn->channel_lock);
17926a79	39
a1399f8b DH	40	for (i = 0; i < RXRPC_MAXCALLS; i++) {
	41	call = rcu_dereference_protected(
	42	conn->channels[i].call,
	43	lockdep_is_held(&conn->channel_lock));
	44	write_lock_bh(&call->state_lock);
17926a79 DH	45	if (call->state <= RXRPC_CALL_COMPLETE) {
17926a79 DH	46	call->state = state;
dc44b3a0 DH	47	if (state == RXRPC_CALL_LOCALLY_ABORTED) {
dc44b3a0 DH	48	call->local_abort = conn->local_abort;
4c198ad1	49	set_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
dc44b3a0 DH	50	} else {
dc44b3a0 DH	51	call->remote_abort = conn->remote_abort;
4c198ad1	52	set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
dc44b3a0	53	}
651350d1	54	rxrpc_queue_call(call);
17926a79	55	}
a1399f8b	56	write_unlock_bh(&call->state_lock);
17926a79 DH	57	}
17926a79 DH	58
a1399f8b	59	spin_unlock(&conn->channel_lock);
17926a79 DH	60	_leave("");
	61	}
	62
	63	/*
	64	* generate a connection-level abort
	65	*/
	66	static int rxrpc_abort_connection(struct rxrpc_connection *conn,
	67	u32 error, u32 abort_code)
	68	{
0d12f8a4	69	struct rxrpc_wire_header whdr;
17926a79 DH	70	struct msghdr msg;
	71	struct kvec iov[2];
	72	__be32 word;
	73	size_t len;
0d12f8a4	74	u32 serial;
17926a79 DH	75	int ret;
	76
	77	_enter("%d,,%u,%u", conn->debug_id, error, abort_code);
	78
	79	/* generate a connection-level abort */
	80	spin_lock_bh(&conn->state_lock);
	81	if (conn->state < RXRPC_CONN_REMOTELY_ABORTED) {
	82	conn->state = RXRPC_CONN_LOCALLY_ABORTED;
	83	conn->error = error;
	84	spin_unlock_bh(&conn->state_lock);
	85	} else {
	86	spin_unlock_bh(&conn->state_lock);
	87	_leave(" = 0 [already dead]");
	88	return 0;
	89	}
	90
	91	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code);
	92
85f32278 DH	93	msg.msg_name = &conn->params.peer->srx.transport;
85f32278 DH	94	msg.msg_namelen = conn->params.peer->srx.transport_len;
17926a79 DH	95	msg.msg_control = NULL;
	96	msg.msg_controllen = 0;
	97	msg.msg_flags = 0;
	98
19ffa01c DH	99	whdr.epoch = htonl(conn->proto.epoch);
19ffa01c DH	100	whdr.cid = htonl(conn->proto.cid);
0d12f8a4 DH	101	whdr.callNumber = 0;
	102	whdr.seq = 0;
	103	whdr.type = RXRPC_PACKET_TYPE_ABORT;
	104	whdr.flags = conn->out_clientflag;
	105	whdr.userStatus = 0;
	106	whdr.securityIndex = conn->security_ix;
	107	whdr._rsvd = 0;
19ffa01c	108	whdr.serviceId = htons(conn->params.service_id);
17926a79	109
dc44b3a0	110	word = htonl(conn->local_abort);
17926a79	111
0d12f8a4 DH	112	iov[0].iov_base = &whdr;
0d12f8a4 DH	113	iov[0].iov_len = sizeof(whdr);
17926a79 DH	114	iov[1].iov_base = &word;
	115	iov[1].iov_len = sizeof(word);
	116
	117	len = iov[0].iov_len + iov[1].iov_len;
	118
0d12f8a4 DH	119	serial = atomic_inc_return(&conn->serial);
0d12f8a4 DH	120	whdr.serial = htonl(serial);
dc44b3a0	121	_proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort);
17926a79	122
85f32278	123	ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len);
17926a79 DH	124	if (ret < 0) {
	125	_debug("sendmsg failed: %d", ret);
	126	return -EAGAIN;
	127	}
	128
	129	_leave(" = 0");
	130	return 0;
	131	}
	132
	133	/*
	134	* mark a call as being on a now-secured channel
	135	* - must be called with softirqs disabled
	136	*/
5eaa65b2	137	static void rxrpc_call_is_secure(struct rxrpc_call *call)
17926a79 DH	138	{
	139	_enter("%p", call);
	140	if (call) {
	141	read_lock(&call->state_lock);
	142	if (call->state < RXRPC_CALL_COMPLETE &&
4c198ad1	143	!test_and_set_bit(RXRPC_CALL_EV_SECURED, &call->events))
651350d1	144	rxrpc_queue_call(call);
17926a79 DH	145	read_unlock(&call->state_lock);
	146	}
	147	}
	148
	149	/*
	150	* connection-level Rx packet processor
	151	*/
	152	static int rxrpc_process_event(struct rxrpc_connection *conn,
	153	struct sk_buff *skb,
	154	u32 *_abort_code)
	155	{
	156	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
0d12f8a4 DH	157	__be32 wtmp;
0d12f8a4 DH	158	u32 abort_code;
17926a79 DH	159	int loop, ret;
17926a79 DH	160
519d2567 DH	161	if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
519d2567 DH	162	kleave(" = -ECONNABORTED [%u]", conn->state);
17926a79	163	return -ECONNABORTED;
519d2567	164	}
17926a79	165
0d12f8a4	166	_enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial);
519d2567	167
17926a79 DH	168	switch (sp->hdr.type) {
17926a79 DH	169	case RXRPC_PACKET_TYPE_ABORT:
0d12f8a4	170	if (skb_copy_bits(skb, 0, &wtmp, sizeof(wtmp)) < 0)
17926a79	171	return -EPROTO;
0d12f8a4 DH	172	abort_code = ntohl(wtmp);
0d12f8a4 DH	173	_proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code);
17926a79 DH	174
	175	conn->state = RXRPC_CONN_REMOTELY_ABORTED;
	176	rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED,
0d12f8a4	177	abort_code);
17926a79 DH	178	return -ECONNABORTED;
	179
	180	case RXRPC_PACKET_TYPE_CHALLENGE:
e0e4d82f DH	181	return conn->security->respond_to_challenge(conn, skb,
e0e4d82f DH	182	_abort_code);
17926a79 DH	183
17926a79 DH	184	case RXRPC_PACKET_TYPE_RESPONSE:
17926a79 DH	185	ret = conn->security->verify_response(conn, skb, _abort_code);
	186	if (ret < 0)
	187	return ret;
	188
	189	ret = conn->security->init_connection_security(conn);
	190	if (ret < 0)
	191	return ret;
	192
a263629d HX	193	ret = conn->security->prime_packet_security(conn);
	194	if (ret < 0)
	195	return ret;
	196
a1399f8b	197	spin_lock(&conn->channel_lock);
17926a79 DH	198	spin_lock(&conn->state_lock);
17926a79 DH	199
bba304db DH	200	if (conn->state == RXRPC_CONN_SERVICE_CHALLENGING) {
bba304db DH	201	conn->state = RXRPC_CONN_SERVICE;
17926a79	202	for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
dee46364 DH	203	rxrpc_call_is_secure(
dee46364 DH	204	rcu_dereference_protected(
a1399f8b DH	205	conn->channels[loop].call,
a1399f8b DH	206	lockdep_is_held(&conn->channel_lock)));
17926a79 DH	207	}
	208
	209	spin_unlock(&conn->state_lock);
a1399f8b	210	spin_unlock(&conn->channel_lock);
17926a79 DH	211	return 0;
	212
	213	default:
519d2567	214	_leave(" = -EPROTO [%u]", sp->hdr.type);
17926a79 DH	215	return -EPROTO;
	216	}
	217	}
	218
	219	/*
	220	* set up security and issue a challenge
	221	*/
	222	static void rxrpc_secure_connection(struct rxrpc_connection *conn)
	223	{
	224	u32 abort_code;
	225	int ret;
	226
	227	_enter("{%d}", conn->debug_id);
	228
	229	ASSERT(conn->security_ix != 0);
	230
19ffa01c	231	if (!conn->params.key) {
17926a79 DH	232	_debug("set up security");
	233	ret = rxrpc_init_server_conn_security(conn);
	234	switch (ret) {
	235	case 0:
	236	break;
	237	case -ENOENT:
	238	abort_code = RX_CALL_DEAD;
	239	goto abort;
	240	default:
	241	abort_code = RXKADNOAUTH;
	242	goto abort;
	243	}
	244	}
	245
17926a79 DH	246	if (conn->security->issue_challenge(conn) < 0) {
	247	abort_code = RX_CALL_DEAD;
	248	ret = -ENOMEM;
	249	goto abort;
	250	}
	251
	252	_leave("");
	253	return;
	254
	255	abort:
	256	_debug("abort %d, %d", ret, abort_code);
	257	rxrpc_abort_connection(conn, -ret, abort_code);
	258	_leave(" [aborted]");
	259	}
	260
	261	/*
	262	* connection-level event processor
	263	*/
	264	void rxrpc_process_connection(struct work_struct *work)
	265	{
	266	struct rxrpc_connection *conn =
	267	container_of(work, struct rxrpc_connection, processor);
17926a79 DH	268	struct sk_buff *skb;
	269	u32 abort_code = RX_PROTOCOL_ERROR;
	270	int ret;
	271
	272	_enter("{%d}", conn->debug_id);
	273
2c4579e4	274	if (test_and_clear_bit(RXRPC_CONN_EV_CHALLENGE, &conn->events))
17926a79	275	rxrpc_secure_connection(conn);
17926a79 DH	276
	277	/* go through the conn-level event packets, releasing the ref on this
	278	* connection that each one has when we've finished with it */
	279	while ((skb = skb_dequeue(&conn->rx_queue))) {
17926a79 DH	280	ret = rxrpc_process_event(conn, skb, &abort_code);
	281	switch (ret) {
	282	case -EPROTO:
	283	case -EKEYEXPIRED:
	284	case -EKEYREJECTED:
	285	goto protocol_error;
	286	case -EAGAIN:
	287	goto requeue_and_leave;
	288	case -ECONNABORTED:
	289	default:
17926a79 DH	290	rxrpc_free_skb(skb);
	291	break;
	292	}
	293	}
	294
	295	out:
	296	rxrpc_put_connection(conn);
	297	_leave("");
	298	return;
	299
	300	requeue_and_leave:
	301	skb_queue_head(&conn->rx_queue, skb);
	302	goto out;
	303
	304	protocol_error:
	305	if (rxrpc_abort_connection(conn, -ret, abort_code) < 0)
	306	goto requeue_and_leave;
17926a79 DH	307	rxrpc_free_skb(skb);
	308	_leave(" [EPROTO]");
	309	goto out;
	310	}
	311
651350d1 DH	312	/*
	313	* put a packet up for transport-level abort
	314	*/
	315	void rxrpc_reject_packet(struct rxrpc_local local, struct sk_buff skb)
	316	{
	317	CHECK_SLAB_OKAY(&local->usage);
	318
651350d1	319	skb_queue_tail(&local->reject_queue, skb);
5acbee46	320	rxrpc_queue_local(local);
651350d1 DH	321	}
651350d1 DH	322
17926a79 DH	323	/*
	324	* reject packets through the local endpoint
	325	*/
4f95dd78	326	void rxrpc_reject_packets(struct rxrpc_local *local)
17926a79 DH	327	{
	328	union {
	329	struct sockaddr sa;
	330	struct sockaddr_in sin;
	331	} sa;
	332	struct rxrpc_skb_priv *sp;
0d12f8a4	333	struct rxrpc_wire_header whdr;
17926a79 DH	334	struct sk_buff *skb;
	335	struct msghdr msg;
	336	struct kvec iov[2];
	337	size_t size;
	338	__be32 code;
	339
17926a79 DH	340	_enter("%d", local->debug_id);
17926a79 DH	341
0d12f8a4 DH	342	iov[0].iov_base = &whdr;
0d12f8a4 DH	343	iov[0].iov_len = sizeof(whdr);
17926a79 DH	344	iov[1].iov_base = &code;
17926a79 DH	345	iov[1].iov_len = sizeof(code);
0d12f8a4	346	size = sizeof(whdr) + sizeof(code);
17926a79 DH	347
	348	msg.msg_name = &sa;
	349	msg.msg_control = NULL;
	350	msg.msg_controllen = 0;
	351	msg.msg_flags = 0;
	352
	353	memset(&sa, 0, sizeof(sa));
	354	sa.sa.sa_family = local->srx.transport.family;
	355	switch (sa.sa.sa_family) {
	356	case AF_INET:
	357	msg.msg_namelen = sizeof(sa.sin);
	358	break;
	359	default:
	360	msg.msg_namelen = 0;
	361	break;
	362	}
	363
0d12f8a4 DH	364	memset(&whdr, 0, sizeof(whdr));
0d12f8a4 DH	365	whdr.type = RXRPC_PACKET_TYPE_ABORT;
17926a79 DH	366
	367	while ((skb = skb_dequeue(&local->reject_queue))) {
	368	sp = rxrpc_skb(skb);
	369	switch (sa.sa.sa_family) {
	370	case AF_INET:
	371	sa.sin.sin_port = udp_hdr(skb)->source;
	372	sa.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
	373	code = htonl(skb->priority);
	374
0d12f8a4 DH	375	whdr.epoch = htonl(sp->hdr.epoch);
	376	whdr.cid = htonl(sp->hdr.cid);
	377	whdr.callNumber = htonl(sp->hdr.callNumber);
	378	whdr.serviceId = htons(sp->hdr.serviceId);
	379	whdr.flags = sp->hdr.flags;
	380	whdr.flags ^= RXRPC_CLIENT_INITIATED;
	381	whdr.flags &= RXRPC_CLIENT_INITIATED;
17926a79 DH	382
	383	kernel_sendmsg(local->socket, &msg, iov, 2, size);
	384	break;
	385
	386	default:
	387	break;
	388	}
	389
	390	rxrpc_free_skb(skb);
17926a79 DH	391	}
17926a79 DH	392
17926a79 DH	393	_leave("");
17926a79 DH	394	}