Linux Audio

Check our new training course

Loading...
v6.2
 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/* AF_RXRPC local endpoint management
 3 *
 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 5 * Written by David Howells (dhowells@redhat.com)
 
 
 
 
 
 6 */
 7
 8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 9
10#include <linux/module.h>
11#include <linux/net.h>
12#include <linux/skbuff.h>
13#include <linux/slab.h>
14#include <net/sock.h>
15#include <net/af_rxrpc.h>
16#include <generated/utsrelease.h>
17#include "ar-internal.h"
18
19static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC";
20
21/*
22 * Reply to a version request
23 */
24void rxrpc_send_version_request(struct rxrpc_local *local,
25				struct rxrpc_host_header *hdr,
26				struct sk_buff *skb)
27{
28	struct rxrpc_wire_header whdr;
29	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
30	struct sockaddr_rxrpc srx;
31	struct msghdr msg;
32	struct kvec iov[2];
33	size_t len;
34	int ret;
35
36	_enter("");
37
38	if (rxrpc_extract_addr_from_skb(&srx, skb) < 0)
39		return;
40
41	msg.msg_name	= &srx.transport;
42	msg.msg_namelen	= srx.transport_len;
43	msg.msg_control	= NULL;
44	msg.msg_controllen = 0;
45	msg.msg_flags	= 0;
46
47	whdr.epoch	= htonl(sp->hdr.epoch);
48	whdr.cid	= htonl(sp->hdr.cid);
49	whdr.callNumber	= htonl(sp->hdr.callNumber);
50	whdr.seq	= 0;
51	whdr.serial	= 0;
52	whdr.type	= RXRPC_PACKET_TYPE_VERSION;
53	whdr.flags	= RXRPC_LAST_PACKET | (~hdr->flags & RXRPC_CLIENT_INITIATED);
54	whdr.userStatus	= 0;
55	whdr.securityIndex = 0;
56	whdr._rsvd	= 0;
57	whdr.serviceId	= htons(sp->hdr.serviceId);
58
59	iov[0].iov_base	= &whdr;
60	iov[0].iov_len	= sizeof(whdr);
61	iov[1].iov_base	= (char *)rxrpc_version_string;
62	iov[1].iov_len	= sizeof(rxrpc_version_string);
63
64	len = iov[0].iov_len + iov[1].iov_len;
65
 
 
66	ret = kernel_sendmsg(local->socket, &msg, iov, 2, len);
67	if (ret < 0)
68		trace_rxrpc_tx_fail(local->debug_id, 0, ret,
69				    rxrpc_tx_point_version_reply);
70	else
71		trace_rxrpc_tx_packet(local->debug_id, &whdr,
72				      rxrpc_tx_point_version_reply);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
73
74	_leave("");
75}
v4.17
 
  1/* AF_RXRPC local endpoint management
  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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 13
 14#include <linux/module.h>
 15#include <linux/net.h>
 16#include <linux/skbuff.h>
 17#include <linux/slab.h>
 18#include <net/sock.h>
 19#include <net/af_rxrpc.h>
 20#include <generated/utsrelease.h>
 21#include "ar-internal.h"
 22
 23static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC";
 24
 25/*
 26 * Reply to a version request
 27 */
 28static void rxrpc_send_version_request(struct rxrpc_local *local,
 29				       struct rxrpc_host_header *hdr,
 30				       struct sk_buff *skb)
 31{
 32	struct rxrpc_wire_header whdr;
 33	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
 34	struct sockaddr_rxrpc srx;
 35	struct msghdr msg;
 36	struct kvec iov[2];
 37	size_t len;
 38	int ret;
 39
 40	_enter("");
 41
 42	if (rxrpc_extract_addr_from_skb(local, &srx, skb) < 0)
 43		return;
 44
 45	msg.msg_name	= &srx.transport;
 46	msg.msg_namelen	= srx.transport_len;
 47	msg.msg_control	= NULL;
 48	msg.msg_controllen = 0;
 49	msg.msg_flags	= 0;
 50
 51	whdr.epoch	= htonl(sp->hdr.epoch);
 52	whdr.cid	= htonl(sp->hdr.cid);
 53	whdr.callNumber	= htonl(sp->hdr.callNumber);
 54	whdr.seq	= 0;
 55	whdr.serial	= 0;
 56	whdr.type	= RXRPC_PACKET_TYPE_VERSION;
 57	whdr.flags	= RXRPC_LAST_PACKET | (~hdr->flags & RXRPC_CLIENT_INITIATED);
 58	whdr.userStatus	= 0;
 59	whdr.securityIndex = 0;
 60	whdr._rsvd	= 0;
 61	whdr.serviceId	= htons(sp->hdr.serviceId);
 62
 63	iov[0].iov_base	= &whdr;
 64	iov[0].iov_len	= sizeof(whdr);
 65	iov[1].iov_base	= (char *)rxrpc_version_string;
 66	iov[1].iov_len	= sizeof(rxrpc_version_string);
 67
 68	len = iov[0].iov_len + iov[1].iov_len;
 69
 70	_proto("Tx VERSION (reply)");
 71
 72	ret = kernel_sendmsg(local->socket, &msg, iov, 2, len);
 73	if (ret < 0)
 74		trace_rxrpc_tx_fail(local->debug_id, 0, ret,
 75				    rxrpc_tx_fail_version_reply);
 76
 77	_leave("");
 78}
 79
 80/*
 81 * Process event packets targetted at a local endpoint.
 82 */
 83void rxrpc_process_local_events(struct rxrpc_local *local)
 84{
 85	struct sk_buff *skb;
 86	char v;
 87
 88	_enter("");
 89
 90	skb = skb_dequeue(&local->event_queue);
 91	if (skb) {
 92		struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
 93
 94		rxrpc_see_skb(skb, rxrpc_skb_rx_seen);
 95		_debug("{%d},{%u}", local->debug_id, sp->hdr.type);
 96
 97		switch (sp->hdr.type) {
 98		case RXRPC_PACKET_TYPE_VERSION:
 99			if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
100					  &v, 1) < 0)
101				return;
102			_proto("Rx VERSION { %02x }", v);
103			if (v == 0)
104				rxrpc_send_version_request(local, &sp->hdr, skb);
105			break;
106
107		default:
108			/* Just ignore anything we don't understand */
109			break;
110		}
111
112		rxrpc_free_skb(skb, rxrpc_skb_rx_freed);
113	}
114
115	_leave("");
116}