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ba4e58ec GR |
1 | /* |
2 | * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828). | |
3 | * | |
4 | * Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $ | |
5 | * | |
6 | * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> | |
7 | * | |
8 | * Changes: | |
9 | * Fixes: | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | #include "udp_impl.h" | |
16 | DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly; | |
17 | ||
18 | struct hlist_head udplite_hash[UDP_HTABLE_SIZE]; | |
ba4e58ec | 19 | |
f5b99bcd | 20 | int udplite_get_port(struct sock *sk, unsigned short p, |
df2bc459 | 21 | int (*c)(const struct sock *, const struct sock *)) |
ba4e58ec | 22 | { |
32c1da70 | 23 | return __udp_lib_get_port(sk, p, udplite_hash, c); |
ba4e58ec GR |
24 | } |
25 | ||
f5b99bcd | 26 | static int udplite_v4_get_port(struct sock *sk, unsigned short snum) |
ba4e58ec | 27 | { |
df2bc459 | 28 | return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal); |
ba4e58ec GR |
29 | } |
30 | ||
f5b99bcd | 31 | static int udplite_rcv(struct sk_buff *skb) |
ba4e58ec | 32 | { |
759e5d00 | 33 | return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE); |
ba4e58ec GR |
34 | } |
35 | ||
f5b99bcd | 36 | static void udplite_err(struct sk_buff *skb, u32 info) |
ba4e58ec | 37 | { |
fc80be87 | 38 | __udp4_lib_err(skb, info, udplite_hash); |
ba4e58ec GR |
39 | } |
40 | ||
41 | static struct net_protocol udplite_protocol = { | |
42 | .handler = udplite_rcv, | |
43 | .err_handler = udplite_err, | |
44 | .no_policy = 1, | |
45 | }; | |
46 | ||
47a31a6f ED |
47 | DEFINE_PROTO_INUSE(udplite) |
48 | ||
ba4e58ec GR |
49 | struct proto udplite_prot = { |
50 | .name = "UDP-Lite", | |
51 | .owner = THIS_MODULE, | |
52 | .close = udp_lib_close, | |
53 | .connect = ip4_datagram_connect, | |
54 | .disconnect = udp_disconnect, | |
55 | .ioctl = udp_ioctl, | |
56 | .init = udplite_sk_init, | |
57 | .destroy = udp_destroy_sock, | |
58 | .setsockopt = udp_setsockopt, | |
59 | .getsockopt = udp_getsockopt, | |
60 | .sendmsg = udp_sendmsg, | |
61 | .recvmsg = udp_recvmsg, | |
62 | .sendpage = udp_sendpage, | |
63 | .backlog_rcv = udp_queue_rcv_skb, | |
64 | .hash = udp_lib_hash, | |
65 | .unhash = udp_lib_unhash, | |
66 | .get_port = udplite_v4_get_port, | |
67 | .obj_size = sizeof(struct udp_sock), | |
68 | #ifdef CONFIG_COMPAT | |
69 | .compat_setsockopt = compat_udp_setsockopt, | |
70 | .compat_getsockopt = compat_udp_getsockopt, | |
71 | #endif | |
47a31a6f | 72 | REF_PROTO_INUSE(udplite) |
ba4e58ec GR |
73 | }; |
74 | ||
75 | static struct inet_protosw udplite4_protosw = { | |
76 | .type = SOCK_DGRAM, | |
77 | .protocol = IPPROTO_UDPLITE, | |
78 | .prot = &udplite_prot, | |
79 | .ops = &inet_dgram_ops, | |
80 | .capability = -1, | |
81 | .no_check = 0, /* must checksum (RFC 3828) */ | |
82 | .flags = INET_PROTOSW_PERMANENT, | |
83 | }; | |
84 | ||
85 | #ifdef CONFIG_PROC_FS | |
86 | static struct file_operations udplite4_seq_fops; | |
87 | static struct udp_seq_afinfo udplite4_seq_afinfo = { | |
88 | .owner = THIS_MODULE, | |
89 | .name = "udplite", | |
90 | .family = AF_INET, | |
91 | .hashtable = udplite_hash, | |
92 | .seq_show = udp4_seq_show, | |
93 | .seq_fops = &udplite4_seq_fops, | |
94 | }; | |
95 | #endif | |
96 | ||
97 | void __init udplite4_register(void) | |
98 | { | |
99 | if (proto_register(&udplite_prot, 1)) | |
100 | goto out_register_err; | |
101 | ||
102 | if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0) | |
103 | goto out_unregister_proto; | |
104 | ||
105 | inet_register_protosw(&udplite4_protosw); | |
106 | ||
107 | #ifdef CONFIG_PROC_FS | |
108 | if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */ | |
109 | printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__); | |
110 | #endif | |
111 | return; | |
112 | ||
113 | out_unregister_proto: | |
114 | proto_unregister(&udplite_prot); | |
115 | out_register_err: | |
116 | printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__); | |
117 | } | |
118 | ||
119 | EXPORT_SYMBOL(udplite_hash); | |
120 | EXPORT_SYMBOL(udplite_prot); | |
121 | EXPORT_SYMBOL(udplite_get_port); |