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Commit | Line | Data |
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ba4e58ec GR |
1 | /* |
2 | * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828). | |
3 | * | |
ba4e58ec GR |
4 | * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> |
5 | * | |
6 | * Changes: | |
7 | * Fixes: | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
afd46503 JP |
13 | |
14 | #define pr_fmt(fmt) "UDPLite: " fmt | |
15 | ||
bc3b2d7f | 16 | #include <linux/export.h> |
ba4e58ec | 17 | #include "udp_impl.h" |
ba4e58ec | 18 | |
f86dcc5a | 19 | struct udp_table udplite_table __read_mostly; |
645ca708 | 20 | EXPORT_SYMBOL(udplite_table); |
ba4e58ec | 21 | |
f5b99bcd | 22 | static int udplite_rcv(struct sk_buff *skb) |
ba4e58ec | 23 | { |
645ca708 | 24 | return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); |
ba4e58ec GR |
25 | } |
26 | ||
f5b99bcd | 27 | static void udplite_err(struct sk_buff *skb, u32 info) |
ba4e58ec | 28 | { |
645ca708 | 29 | __udp4_lib_err(skb, info, &udplite_table); |
ba4e58ec GR |
30 | } |
31 | ||
32613090 | 32 | static const struct net_protocol udplite_protocol = { |
ba4e58ec GR |
33 | .handler = udplite_rcv, |
34 | .err_handler = udplite_err, | |
35 | .no_policy = 1, | |
92f1fecb | 36 | .netns_ok = 1, |
ba4e58ec GR |
37 | }; |
38 | ||
39 | struct proto udplite_prot = { | |
40 | .name = "UDP-Lite", | |
41 | .owner = THIS_MODULE, | |
42 | .close = udp_lib_close, | |
43 | .connect = ip4_datagram_connect, | |
44 | .disconnect = udp_disconnect, | |
45 | .ioctl = udp_ioctl, | |
46 | .init = udplite_sk_init, | |
47 | .destroy = udp_destroy_sock, | |
48 | .setsockopt = udp_setsockopt, | |
49 | .getsockopt = udp_getsockopt, | |
50 | .sendmsg = udp_sendmsg, | |
51 | .recvmsg = udp_recvmsg, | |
52 | .sendpage = udp_sendpage, | |
53 | .backlog_rcv = udp_queue_rcv_skb, | |
54 | .hash = udp_lib_hash, | |
55 | .unhash = udp_lib_unhash, | |
6ba5a3c5 | 56 | .get_port = udp_v4_get_port, |
ba4e58ec | 57 | .obj_size = sizeof(struct udp_sock), |
645ca708 | 58 | .h.udp_table = &udplite_table, |
ba4e58ec GR |
59 | #ifdef CONFIG_COMPAT |
60 | .compat_setsockopt = compat_udp_setsockopt, | |
61 | .compat_getsockopt = compat_udp_getsockopt, | |
62 | #endif | |
fcbdf09d | 63 | .clear_sk = sk_prot_clear_portaddr_nulls, |
ba4e58ec | 64 | }; |
4bc2f18b | 65 | EXPORT_SYMBOL(udplite_prot); |
ba4e58ec GR |
66 | |
67 | static struct inet_protosw udplite4_protosw = { | |
68 | .type = SOCK_DGRAM, | |
69 | .protocol = IPPROTO_UDPLITE, | |
70 | .prot = &udplite_prot, | |
71 | .ops = &inet_dgram_ops, | |
ba4e58ec GR |
72 | .flags = INET_PROTOSW_PERMANENT, |
73 | }; | |
74 | ||
75 | #ifdef CONFIG_PROC_FS | |
73cb88ec AV |
76 | |
77 | static const struct file_operations udplite_afinfo_seq_fops = { | |
78 | .owner = THIS_MODULE, | |
79 | .open = udp_seq_open, | |
80 | .read = seq_read, | |
81 | .llseek = seq_lseek, | |
82 | .release = seq_release_net | |
83 | }; | |
84 | ||
ba4e58ec | 85 | static struct udp_seq_afinfo udplite4_seq_afinfo = { |
ba4e58ec GR |
86 | .name = "udplite", |
87 | .family = AF_INET, | |
645ca708 | 88 | .udp_table = &udplite_table, |
73cb88ec | 89 | .seq_fops = &udplite_afinfo_seq_fops, |
dda61925 DL |
90 | .seq_ops = { |
91 | .show = udp4_seq_show, | |
92 | }, | |
ba4e58ec | 93 | }; |
ff2bac6a | 94 | |
2c8c1e72 | 95 | static int __net_init udplite4_proc_init_net(struct net *net) |
84c375af PE |
96 | { |
97 | return udp_proc_register(net, &udplite4_seq_afinfo); | |
98 | } | |
99 | ||
2c8c1e72 | 100 | static void __net_exit udplite4_proc_exit_net(struct net *net) |
84c375af PE |
101 | { |
102 | udp_proc_unregister(net, &udplite4_seq_afinfo); | |
103 | } | |
104 | ||
105 | static struct pernet_operations udplite4_net_ops = { | |
106 | .init = udplite4_proc_init_net, | |
107 | .exit = udplite4_proc_exit_net, | |
108 | }; | |
109 | ||
ff2bac6a PE |
110 | static __init int udplite4_proc_init(void) |
111 | { | |
84c375af | 112 | return register_pernet_subsys(&udplite4_net_ops); |
ff2bac6a PE |
113 | } |
114 | #else | |
115 | static inline int udplite4_proc_init(void) | |
116 | { | |
117 | return 0; | |
118 | } | |
ba4e58ec GR |
119 | #endif |
120 | ||
121 | void __init udplite4_register(void) | |
122 | { | |
f86dcc5a | 123 | udp_table_init(&udplite_table, "UDP-Lite"); |
ba4e58ec GR |
124 | if (proto_register(&udplite_prot, 1)) |
125 | goto out_register_err; | |
126 | ||
127 | if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0) | |
128 | goto out_unregister_proto; | |
129 | ||
130 | inet_register_protosw(&udplite4_protosw); | |
131 | ||
ff2bac6a | 132 | if (udplite4_proc_init()) |
058bd4d2 | 133 | pr_err("%s: Cannot register /proc!\n", __func__); |
ba4e58ec GR |
134 | return; |
135 | ||
136 | out_unregister_proto: | |
137 | proto_unregister(&udplite_prot); | |
138 | out_register_err: | |
058bd4d2 | 139 | pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__); |
ba4e58ec | 140 | } |