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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]; | |
19 | static int udplite_port_rover; | |
20 | ||
f5b99bcd | 21 | int udplite_get_port(struct sock *sk, unsigned short p, |
fc038410 | 22 | const struct udp_get_port_ops *ops) |
ba4e58ec | 23 | { |
fc038410 DM |
24 | return __udp_lib_get_port(sk, p, udplite_hash, |
25 | &udplite_port_rover, ops); | |
ba4e58ec GR |
26 | } |
27 | ||
f5b99bcd | 28 | static int udplite_v4_get_port(struct sock *sk, unsigned short snum) |
ba4e58ec | 29 | { |
fc038410 | 30 | return udplite_get_port(sk, snum, &udp_ipv4_ops); |
ba4e58ec GR |
31 | } |
32 | ||
f5b99bcd | 33 | static int udplite_rcv(struct sk_buff *skb) |
ba4e58ec | 34 | { |
759e5d00 | 35 | return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE); |
ba4e58ec GR |
36 | } |
37 | ||
f5b99bcd | 38 | static void udplite_err(struct sk_buff *skb, u32 info) |
ba4e58ec GR |
39 | { |
40 | return __udp4_lib_err(skb, info, udplite_hash); | |
41 | } | |
42 | ||
43 | static struct net_protocol udplite_protocol = { | |
44 | .handler = udplite_rcv, | |
45 | .err_handler = udplite_err, | |
46 | .no_policy = 1, | |
47 | }; | |
48 | ||
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 | |
72 | }; | |
73 | ||
74 | static struct inet_protosw udplite4_protosw = { | |
75 | .type = SOCK_DGRAM, | |
76 | .protocol = IPPROTO_UDPLITE, | |
77 | .prot = &udplite_prot, | |
78 | .ops = &inet_dgram_ops, | |
79 | .capability = -1, | |
80 | .no_check = 0, /* must checksum (RFC 3828) */ | |
81 | .flags = INET_PROTOSW_PERMANENT, | |
82 | }; | |
83 | ||
84 | #ifdef CONFIG_PROC_FS | |
85 | static struct file_operations udplite4_seq_fops; | |
86 | static struct udp_seq_afinfo udplite4_seq_afinfo = { | |
87 | .owner = THIS_MODULE, | |
88 | .name = "udplite", | |
89 | .family = AF_INET, | |
90 | .hashtable = udplite_hash, | |
91 | .seq_show = udp4_seq_show, | |
92 | .seq_fops = &udplite4_seq_fops, | |
93 | }; | |
94 | #endif | |
95 | ||
96 | void __init udplite4_register(void) | |
97 | { | |
98 | if (proto_register(&udplite_prot, 1)) | |
99 | goto out_register_err; | |
100 | ||
101 | if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0) | |
102 | goto out_unregister_proto; | |
103 | ||
104 | inet_register_protosw(&udplite4_protosw); | |
105 | ||
106 | #ifdef CONFIG_PROC_FS | |
107 | if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */ | |
108 | printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__); | |
109 | #endif | |
110 | return; | |
111 | ||
112 | out_unregister_proto: | |
113 | proto_unregister(&udplite_prot); | |
114 | out_register_err: | |
115 | printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__); | |
116 | } | |
117 | ||
118 | EXPORT_SYMBOL(udplite_hash); | |
119 | EXPORT_SYMBOL(udplite_prot); | |
120 | EXPORT_SYMBOL(udplite_get_port); |