Commit | Line | Data |
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87563616 DH |
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 <linux/udp.h> | |
19 | #include <linux/ip.h> | |
20 | #include <net/sock.h> | |
21 | #include <net/af_rxrpc.h> | |
22 | #include <generated/utsrelease.h> | |
23 | #include "ar-internal.h" | |
24 | ||
25 | static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC"; | |
26 | ||
27 | /* | |
28 | * Reply to a version request | |
29 | */ | |
30 | static void rxrpc_send_version_request(struct rxrpc_local *local, | |
31 | struct rxrpc_host_header *hdr, | |
32 | struct sk_buff *skb) | |
33 | { | |
34 | struct rxrpc_wire_header whdr; | |
35 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
36 | struct sockaddr_in sin; | |
37 | struct msghdr msg; | |
38 | struct kvec iov[2]; | |
39 | size_t len; | |
40 | int ret; | |
41 | ||
42 | _enter(""); | |
43 | ||
44 | sin.sin_family = AF_INET; | |
45 | sin.sin_port = udp_hdr(skb)->source; | |
46 | sin.sin_addr.s_addr = ip_hdr(skb)->saddr; | |
47 | ||
48 | msg.msg_name = &sin; | |
49 | msg.msg_namelen = sizeof(sin); | |
50 | msg.msg_control = NULL; | |
51 | msg.msg_controllen = 0; | |
52 | msg.msg_flags = 0; | |
53 | ||
54 | whdr.epoch = htonl(sp->hdr.epoch); | |
55 | whdr.cid = htonl(sp->hdr.cid); | |
56 | whdr.callNumber = htonl(sp->hdr.callNumber); | |
57 | whdr.seq = 0; | |
58 | whdr.serial = 0; | |
59 | whdr.type = RXRPC_PACKET_TYPE_VERSION; | |
60 | whdr.flags = RXRPC_LAST_PACKET | (~hdr->flags & RXRPC_CLIENT_INITIATED); | |
61 | whdr.userStatus = 0; | |
62 | whdr.securityIndex = 0; | |
63 | whdr._rsvd = 0; | |
64 | whdr.serviceId = htons(sp->hdr.serviceId); | |
65 | ||
66 | iov[0].iov_base = &whdr; | |
67 | iov[0].iov_len = sizeof(whdr); | |
68 | iov[1].iov_base = (char *)rxrpc_version_string; | |
69 | iov[1].iov_len = sizeof(rxrpc_version_string); | |
70 | ||
71 | len = iov[0].iov_len + iov[1].iov_len; | |
72 | ||
73 | _proto("Tx VERSION (reply)"); | |
74 | ||
75 | ret = kernel_sendmsg(local->socket, &msg, iov, 2, len); | |
76 | if (ret < 0) | |
77 | _debug("sendmsg failed: %d", ret); | |
78 | ||
79 | _leave(""); | |
80 | } | |
81 | ||
82 | /* | |
83 | * Process event packets targetted at a local endpoint. | |
84 | */ | |
4f95dd78 | 85 | void rxrpc_process_local_events(struct rxrpc_local *local) |
87563616 | 86 | { |
87563616 DH |
87 | struct sk_buff *skb; |
88 | char v; | |
89 | ||
90 | _enter(""); | |
91 | ||
4f95dd78 DH |
92 | skb = skb_dequeue(&local->event_queue); |
93 | if (skb) { | |
87563616 DH |
94 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
95 | ||
96 | _debug("{%d},{%u}", local->debug_id, sp->hdr.type); | |
97 | ||
98 | switch (sp->hdr.type) { | |
99 | case RXRPC_PACKET_TYPE_VERSION: | |
100 | if (skb_copy_bits(skb, 0, &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 | ||
87563616 DH |
112 | rxrpc_free_skb(skb); |
113 | } | |
114 | ||
87563616 DH |
115 | _leave(""); |
116 | } |