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 | |
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(buf: rxrpc_version_string, size: sizeof(rxrpc_version_string), |
27 | fmt: "linux-%.49s AF_RXRPC" , UTS_RELEASE); |
28 | } |
29 | |
30 | /* |
31 | * Reply to a version request |
32 | */ |
33 | void rxrpc_send_version_request(struct rxrpc_local *local, |
34 | struct rxrpc_host_header *hdr, |
35 | struct sk_buff *skb) |
36 | { |
37 | struct rxrpc_wire_header whdr; |
38 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
39 | struct sockaddr_rxrpc srx; |
40 | struct msghdr msg; |
41 | struct kvec iov[2]; |
42 | size_t len; |
43 | int ret; |
44 | |
45 | _enter("" ); |
46 | |
47 | if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) |
48 | return; |
49 | |
50 | msg.msg_name = &srx.transport; |
51 | msg.msg_namelen = srx.transport_len; |
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 | |
75 | ret = kernel_sendmsg(sock: local->socket, msg: &msg, vec: iov, num: 2, len); |
76 | if (ret < 0) |
77 | trace_rxrpc_tx_fail(debug_id: local->debug_id, serial: 0, ret, |
78 | where: rxrpc_tx_point_version_reply); |
79 | else |
80 | trace_rxrpc_tx_packet(call_id: local->debug_id, whdr: &whdr, |
81 | where: rxrpc_tx_point_version_reply); |
82 | |
83 | _leave("" ); |
84 | } |
85 | |