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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
87563616 DH |
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) | |
87563616 DH |
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> | |
87563616 DH |
14 | #include <net/sock.h> |
15 | #include <net/af_rxrpc.h> | |
16 | #include <generated/utsrelease.h> | |
17 | #include "ar-internal.h" | |
18 | ||
19 | static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC"; | |
20 | ||
21 | /* | |
22 | * Reply to a version request | |
23 | */ | |
5e6ef4f1 DH |
24 | void rxrpc_send_version_request(struct rxrpc_local *local, |
25 | struct rxrpc_host_header *hdr, | |
26 | struct sk_buff *skb) | |
87563616 DH |
27 | { |
28 | struct rxrpc_wire_header whdr; | |
29 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
1c2bc7b9 | 30 | struct sockaddr_rxrpc srx; |
87563616 DH |
31 | struct msghdr msg; |
32 | struct kvec iov[2]; | |
33 | size_t len; | |
34 | int ret; | |
35 | ||
36 | _enter(""); | |
37 | ||
5a790b73 | 38 | if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) |
1c2bc7b9 | 39 | return; |
87563616 | 40 | |
1c2bc7b9 DH |
41 | msg.msg_name = &srx.transport; |
42 | msg.msg_namelen = srx.transport_len; | |
87563616 DH |
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 | ||
87563616 DH |
66 | ret = kernel_sendmsg(local->socket, &msg, iov, 2, len); |
67 | if (ret < 0) | |
6b47fe1d | 68 | trace_rxrpc_tx_fail(local->debug_id, 0, ret, |
4764c0da DH |
69 | rxrpc_tx_point_version_reply); |
70 | else | |
71 | trace_rxrpc_tx_packet(local->debug_id, &whdr, | |
72 | rxrpc_tx_point_version_reply); | |
87563616 DH |
73 | |
74 | _leave(""); | |
75 | } |