Commit | Line | Data |
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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 | ||
020c69c1 DH |
19 | static char rxrpc_version_string[65]; // "linux-" UTS_RELEASE " AF_RXRPC"; |
20 | ||
21 | /* | |
22 | * Generate the VERSION packet string. | |
23 | */ | |
24 | void rxrpc_gen_version_string(void) | |
25 | { | |
26 | snprintf(rxrpc_version_string, sizeof(rxrpc_version_string), | |
27 | "linux-%.49s AF_RXRPC", UTS_RELEASE); | |
28 | } | |
87563616 DH |
29 | |
30 | /* | |
31 | * Reply to a version request | |
32 | */ | |
5e6ef4f1 DH |
33 | void rxrpc_send_version_request(struct rxrpc_local *local, |
34 | struct rxrpc_host_header *hdr, | |
35 | struct sk_buff *skb) | |
87563616 DH |
36 | { |
37 | struct rxrpc_wire_header whdr; | |
38 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
1c2bc7b9 | 39 | struct sockaddr_rxrpc srx; |
87563616 DH |
40 | struct msghdr msg; |
41 | struct kvec iov[2]; | |
42 | size_t len; | |
43 | int ret; | |
44 | ||
45 | _enter(""); | |
46 | ||
5a790b73 | 47 | if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) |
1c2bc7b9 | 48 | return; |
87563616 | 49 | |
1c2bc7b9 DH |
50 | msg.msg_name = &srx.transport; |
51 | msg.msg_namelen = srx.transport_len; | |
87563616 DH |
52 | msg.msg_control = NULL; |
53 | msg.msg_controllen = 0; | |
54 | msg.msg_flags = 0; | |
55 | ||
56 | whdr.epoch = htonl(sp->hdr.epoch); | |
57 | whdr.cid = htonl(sp->hdr.cid); | |
58 | whdr.callNumber = htonl(sp->hdr.callNumber); | |
59 | whdr.seq = 0; | |
60 | whdr.serial = 0; | |
61 | whdr.type = RXRPC_PACKET_TYPE_VERSION; | |
62 | whdr.flags = RXRPC_LAST_PACKET | (~hdr->flags & RXRPC_CLIENT_INITIATED); | |
63 | whdr.userStatus = 0; | |
64 | whdr.securityIndex = 0; | |
65 | whdr._rsvd = 0; | |
66 | whdr.serviceId = htons(sp->hdr.serviceId); | |
67 | ||
68 | iov[0].iov_base = &whdr; | |
69 | iov[0].iov_len = sizeof(whdr); | |
70 | iov[1].iov_base = (char *)rxrpc_version_string; | |
71 | iov[1].iov_len = sizeof(rxrpc_version_string); | |
72 | ||
73 | len = iov[0].iov_len + iov[1].iov_len; | |
74 | ||
87563616 DH |
75 | ret = kernel_sendmsg(local->socket, &msg, iov, 2, len); |
76 | if (ret < 0) | |
6b47fe1d | 77 | trace_rxrpc_tx_fail(local->debug_id, 0, ret, |
4764c0da DH |
78 | rxrpc_tx_point_version_reply); |
79 | else | |
80 | trace_rxrpc_tx_packet(local->debug_id, &whdr, | |
81 | rxrpc_tx_point_version_reply); | |
87563616 DH |
82 | |
83 | _leave(""); | |
84 | } |