[mirror_ubuntu-bionic-kernel.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;
	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);

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

/*
 * 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;
	34	struct rb_node *p;
	35
	36	_enter("{%d},%x", conn->debug_id, abort_code);
	37
	38	read_lock_bh(&conn->lock);
	39
	40	for (p = rb_first(&conn->calls); p; p = rb_next(p)) {
	41	call = rb_entry(p, struct rxrpc_call, conn_node);
	42	write_lock(&call->state_lock);
	43	if (call->state <= RXRPC_CALL_COMPLETE) {
	44	call->state = state;
dc44b3a0 DH	45	if (state == RXRPC_CALL_LOCALLY_ABORTED) {
dc44b3a0 DH	46	call->local_abort = conn->local_abort;
4c198ad1	47	set_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
dc44b3a0 DH	48	} else {
dc44b3a0 DH	49	call->remote_abort = conn->remote_abort;
4c198ad1	50	set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
dc44b3a0	51	}
651350d1	52	rxrpc_queue_call(call);
17926a79 DH	53	}
	54	write_unlock(&call->state_lock);
	55	}
	56
	57	read_unlock_bh(&conn->lock);
	58	_leave("");
	59	}
	60
	61	/*
	62	* generate a connection-level abort
	63	*/
	64	static int rxrpc_abort_connection(struct rxrpc_connection *conn,
	65	u32 error, u32 abort_code)
	66	{
0d12f8a4	67	struct rxrpc_wire_header whdr;
17926a79 DH	68	struct msghdr msg;
	69	struct kvec iov[2];
	70	__be32 word;
	71	size_t len;
0d12f8a4	72	u32 serial;
17926a79 DH	73	int ret;
	74
	75	_enter("%d,,%u,%u", conn->debug_id, error, abort_code);
	76
	77	/* generate a connection-level abort */
	78	spin_lock_bh(&conn->state_lock);
	79	if (conn->state < RXRPC_CONN_REMOTELY_ABORTED) {
	80	conn->state = RXRPC_CONN_LOCALLY_ABORTED;
	81	conn->error = error;
	82	spin_unlock_bh(&conn->state_lock);
	83	} else {
	84	spin_unlock_bh(&conn->state_lock);
	85	_leave(" = 0 [already dead]");
	86	return 0;
	87	}
	88
	89	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code);
	90
6dd050f8 DH	91	msg.msg_name = &conn->trans->peer->srx.transport;
6dd050f8 DH	92	msg.msg_namelen = conn->trans->peer->srx.transport_len;
17926a79 DH	93	msg.msg_control = NULL;
	94	msg.msg_controllen = 0;
	95	msg.msg_flags = 0;
	96
0d12f8a4 DH	97	whdr.epoch = htonl(conn->epoch);
	98	whdr.cid = htonl(conn->cid);
	99	whdr.callNumber = 0;
	100	whdr.seq = 0;
	101	whdr.type = RXRPC_PACKET_TYPE_ABORT;
	102	whdr.flags = conn->out_clientflag;
	103	whdr.userStatus = 0;
	104	whdr.securityIndex = conn->security_ix;
	105	whdr._rsvd = 0;
	106	whdr.serviceId = htons(conn->service_id);
17926a79	107
dc44b3a0	108	word = htonl(conn->local_abort);
17926a79	109
0d12f8a4 DH	110	iov[0].iov_base = &whdr;
0d12f8a4 DH	111	iov[0].iov_len = sizeof(whdr);
17926a79 DH	112	iov[1].iov_base = &word;
	113	iov[1].iov_len = sizeof(word);
	114
	115	len = iov[0].iov_len + iov[1].iov_len;
	116
0d12f8a4 DH	117	serial = atomic_inc_return(&conn->serial);
0d12f8a4 DH	118	whdr.serial = htonl(serial);
dc44b3a0	119	_proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort);
17926a79 DH	120
	121	ret = kernel_sendmsg(conn->trans->local->socket, &msg, iov, 2, len);
	122	if (ret < 0) {
	123	_debug("sendmsg failed: %d", ret);
	124	return -EAGAIN;
	125	}
	126
	127	_leave(" = 0");
	128	return 0;
	129	}
	130
	131	/*
	132	* mark a call as being on a now-secured channel
	133	* - must be called with softirqs disabled
	134	*/
5eaa65b2	135	static void rxrpc_call_is_secure(struct rxrpc_call *call)
17926a79 DH	136	{
	137	_enter("%p", call);
	138	if (call) {
	139	read_lock(&call->state_lock);
	140	if (call->state < RXRPC_CALL_COMPLETE &&
4c198ad1	141	!test_and_set_bit(RXRPC_CALL_EV_SECURED, &call->events))
651350d1	142	rxrpc_queue_call(call);
17926a79 DH	143	read_unlock(&call->state_lock);
	144	}
	145	}
	146
	147	/*
	148	* connection-level Rx packet processor
	149	*/
	150	static int rxrpc_process_event(struct rxrpc_connection *conn,
	151	struct sk_buff *skb,
	152	u32 *_abort_code)
	153	{
	154	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
0d12f8a4 DH	155	__be32 wtmp;
0d12f8a4 DH	156	u32 abort_code;
17926a79 DH	157	int loop, ret;
17926a79 DH	158
519d2567 DH	159	if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
519d2567 DH	160	kleave(" = -ECONNABORTED [%u]", conn->state);
17926a79	161	return -ECONNABORTED;
519d2567	162	}
17926a79	163
0d12f8a4	164	_enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial);
519d2567	165
17926a79 DH	166	switch (sp->hdr.type) {
17926a79 DH	167	case RXRPC_PACKET_TYPE_ABORT:
0d12f8a4	168	if (skb_copy_bits(skb, 0, &wtmp, sizeof(wtmp)) < 0)
17926a79	169	return -EPROTO;
0d12f8a4 DH	170	abort_code = ntohl(wtmp);
0d12f8a4 DH	171	_proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code);
17926a79 DH	172
	173	conn->state = RXRPC_CONN_REMOTELY_ABORTED;
	174	rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED,
0d12f8a4	175	abort_code);
17926a79 DH	176	return -ECONNABORTED;
	177
	178	case RXRPC_PACKET_TYPE_CHALLENGE:
e0e4d82f DH	179	return conn->security->respond_to_challenge(conn, skb,
e0e4d82f DH	180	_abort_code);
17926a79 DH	181
17926a79 DH	182	case RXRPC_PACKET_TYPE_RESPONSE:
17926a79 DH	183	ret = conn->security->verify_response(conn, skb, _abort_code);
	184	if (ret < 0)
	185	return ret;
	186
	187	ret = conn->security->init_connection_security(conn);
	188	if (ret < 0)
	189	return ret;
	190
	191	conn->security->prime_packet_security(conn);
	192	read_lock_bh(&conn->lock);
	193	spin_lock(&conn->state_lock);
	194
	195	if (conn->state == RXRPC_CONN_SERVER_CHALLENGING) {
	196	conn->state = RXRPC_CONN_SERVER;
	197	for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
	198	rxrpc_call_is_secure(conn->channels[loop]);
	199	}
	200
	201	spin_unlock(&conn->state_lock);
	202	read_unlock_bh(&conn->lock);
	203	return 0;
	204
	205	default:
519d2567	206	_leave(" = -EPROTO [%u]", sp->hdr.type);
17926a79 DH	207	return -EPROTO;
	208	}
	209	}
	210
	211	/*
	212	* set up security and issue a challenge
	213	*/
	214	static void rxrpc_secure_connection(struct rxrpc_connection *conn)
	215	{
	216	u32 abort_code;
	217	int ret;
	218
	219	_enter("{%d}", conn->debug_id);
	220
	221	ASSERT(conn->security_ix != 0);
	222
	223	if (!conn->key) {
	224	_debug("set up security");
	225	ret = rxrpc_init_server_conn_security(conn);
	226	switch (ret) {
	227	case 0:
	228	break;
	229	case -ENOENT:
	230	abort_code = RX_CALL_DEAD;
	231	goto abort;
	232	default:
	233	abort_code = RXKADNOAUTH;
	234	goto abort;
	235	}
	236	}
	237
17926a79 DH	238	if (conn->security->issue_challenge(conn) < 0) {
	239	abort_code = RX_CALL_DEAD;
	240	ret = -ENOMEM;
	241	goto abort;
	242	}
	243
	244	_leave("");
	245	return;
	246
	247	abort:
	248	_debug("abort %d, %d", ret, abort_code);
	249	rxrpc_abort_connection(conn, -ret, abort_code);
	250	_leave(" [aborted]");
	251	}
	252
	253	/*
	254	* connection-level event processor
	255	*/
	256	void rxrpc_process_connection(struct work_struct *work)
	257	{
	258	struct rxrpc_connection *conn =
	259	container_of(work, struct rxrpc_connection, processor);
17926a79 DH	260	struct sk_buff *skb;
	261	u32 abort_code = RX_PROTOCOL_ERROR;
	262	int ret;
	263
	264	_enter("{%d}", conn->debug_id);
	265
	266	atomic_inc(&conn->usage);
	267
	268	if (test_and_clear_bit(RXRPC_CONN_CHALLENGE, &conn->events)) {
	269	rxrpc_secure_connection(conn);
	270	rxrpc_put_connection(conn);
	271	}
	272
	273	/* go through the conn-level event packets, releasing the ref on this
	274	* connection that each one has when we've finished with it */
	275	while ((skb = skb_dequeue(&conn->rx_queue))) {
17926a79 DH	276	ret = rxrpc_process_event(conn, skb, &abort_code);
	277	switch (ret) {
	278	case -EPROTO:
	279	case -EKEYEXPIRED:
	280	case -EKEYREJECTED:
	281	goto protocol_error;
	282	case -EAGAIN:
	283	goto requeue_and_leave;
	284	case -ECONNABORTED:
	285	default:
	286	rxrpc_put_connection(conn);
	287	rxrpc_free_skb(skb);
	288	break;
	289	}
	290	}
	291
	292	out:
	293	rxrpc_put_connection(conn);
	294	_leave("");
	295	return;
	296
	297	requeue_and_leave:
	298	skb_queue_head(&conn->rx_queue, skb);
	299	goto out;
	300
	301	protocol_error:
	302	if (rxrpc_abort_connection(conn, -ret, abort_code) < 0)
	303	goto requeue_and_leave;
	304	rxrpc_put_connection(conn);
	305	rxrpc_free_skb(skb);
	306	_leave(" [EPROTO]");
	307	goto out;
	308	}
	309
651350d1 DH	310	/*
	311	* put a packet up for transport-level abort
	312	*/
	313	void rxrpc_reject_packet(struct rxrpc_local local, struct sk_buff skb)
	314	{
	315	CHECK_SLAB_OKAY(&local->usage);
	316
651350d1	317	skb_queue_tail(&local->reject_queue, skb);
4f95dd78	318	rxrpc_queue_work(&local->processor);
651350d1 DH	319	}
651350d1 DH	320
17926a79 DH	321	/*
	322	* reject packets through the local endpoint
	323	*/
4f95dd78	324	void rxrpc_reject_packets(struct rxrpc_local *local)
17926a79 DH	325	{
	326	union {
	327	struct sockaddr sa;
	328	struct sockaddr_in sin;
	329	} sa;
	330	struct rxrpc_skb_priv *sp;
0d12f8a4	331	struct rxrpc_wire_header whdr;
17926a79 DH	332	struct sk_buff *skb;
	333	struct msghdr msg;
	334	struct kvec iov[2];
	335	size_t size;
	336	__be32 code;
	337
17926a79 DH	338	_enter("%d", local->debug_id);
17926a79 DH	339
0d12f8a4 DH	340	iov[0].iov_base = &whdr;
0d12f8a4 DH	341	iov[0].iov_len = sizeof(whdr);
17926a79 DH	342	iov[1].iov_base = &code;
17926a79 DH	343	iov[1].iov_len = sizeof(code);
0d12f8a4	344	size = sizeof(whdr) + sizeof(code);
17926a79 DH	345
	346	msg.msg_name = &sa;
	347	msg.msg_control = NULL;
	348	msg.msg_controllen = 0;
	349	msg.msg_flags = 0;
	350
	351	memset(&sa, 0, sizeof(sa));
	352	sa.sa.sa_family = local->srx.transport.family;
	353	switch (sa.sa.sa_family) {
	354	case AF_INET:
	355	msg.msg_namelen = sizeof(sa.sin);
	356	break;
	357	default:
	358	msg.msg_namelen = 0;
	359	break;
	360	}
	361
0d12f8a4 DH	362	memset(&whdr, 0, sizeof(whdr));
0d12f8a4 DH	363	whdr.type = RXRPC_PACKET_TYPE_ABORT;
17926a79 DH	364
	365	while ((skb = skb_dequeue(&local->reject_queue))) {
	366	sp = rxrpc_skb(skb);
	367	switch (sa.sa.sa_family) {
	368	case AF_INET:
	369	sa.sin.sin_port = udp_hdr(skb)->source;
	370	sa.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
	371	code = htonl(skb->priority);
	372
0d12f8a4 DH	373	whdr.epoch = htonl(sp->hdr.epoch);
	374	whdr.cid = htonl(sp->hdr.cid);
	375	whdr.callNumber = htonl(sp->hdr.callNumber);
	376	whdr.serviceId = htons(sp->hdr.serviceId);
	377	whdr.flags = sp->hdr.flags;
	378	whdr.flags ^= RXRPC_CLIENT_INITIATED;
	379	whdr.flags &= RXRPC_CLIENT_INITIATED;
17926a79 DH	380
	381	kernel_sendmsg(local->socket, &msg, iov, 2, size);
	382	break;
	383
	384	default:
	385	break;
	386	}
	387
	388	rxrpc_free_skb(skb);
17926a79 DH	389	}
17926a79 DH	390
17926a79 DH	391	_leave("");
17926a79 DH	392	}