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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 | */ | |
24 | static void 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); | |
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 | ||
66 | _proto("Tx VERSION (reply)"); | |
67 | ||
68 | ret = kernel_sendmsg(local->socket, &msg, iov, 2, len); | |
69 | if (ret < 0) | |
6b47fe1d | 70 | trace_rxrpc_tx_fail(local->debug_id, 0, ret, |
4764c0da DH |
71 | rxrpc_tx_point_version_reply); |
72 | else | |
73 | trace_rxrpc_tx_packet(local->debug_id, &whdr, | |
74 | rxrpc_tx_point_version_reply); | |
87563616 DH |
75 | |
76 | _leave(""); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Process event packets targetted at a local endpoint. | |
81 | */ | |
4f95dd78 | 82 | void rxrpc_process_local_events(struct rxrpc_local *local) |
87563616 | 83 | { |
87563616 DH |
84 | struct sk_buff *skb; |
85 | char v; | |
86 | ||
87 | _enter(""); | |
88 | ||
4f95dd78 DH |
89 | skb = skb_dequeue(&local->event_queue); |
90 | if (skb) { | |
87563616 DH |
91 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
92 | ||
71f3ca40 | 93 | rxrpc_see_skb(skb, rxrpc_skb_rx_seen); |
87563616 DH |
94 | _debug("{%d},{%u}", local->debug_id, sp->hdr.type); |
95 | ||
96 | switch (sp->hdr.type) { | |
97 | case RXRPC_PACKET_TYPE_VERSION: | |
775e5b71 DH |
98 | if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), |
99 | &v, 1) < 0) | |
87563616 DH |
100 | return; |
101 | _proto("Rx VERSION { %02x }", v); | |
102 | if (v == 0) | |
103 | rxrpc_send_version_request(local, &sp->hdr, skb); | |
104 | break; | |
105 | ||
106 | default: | |
107 | /* Just ignore anything we don't understand */ | |
108 | break; | |
109 | } | |
110 | ||
71f3ca40 | 111 | rxrpc_free_skb(skb, rxrpc_skb_rx_freed); |
87563616 DH |
112 | } |
113 | ||
87563616 DH |
114 | _leave(""); |
115 | } |