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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ba4e58ec GR |
2 | /* |
3 | * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828). | |
4 | * | |
ba4e58ec GR |
5 | * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> |
6 | * | |
7 | * Changes: | |
8 | * Fixes: | |
ba4e58ec | 9 | */ |
afd46503 JP |
10 | |
11 | #define pr_fmt(fmt) "UDPLite: " fmt | |
12 | ||
bc3b2d7f | 13 | #include <linux/export.h> |
a3d2599b | 14 | #include <linux/proc_fs.h> |
ba4e58ec | 15 | #include "udp_impl.h" |
ba4e58ec | 16 | |
f86dcc5a | 17 | struct udp_table udplite_table __read_mostly; |
645ca708 | 18 | EXPORT_SYMBOL(udplite_table); |
ba4e58ec | 19 | |
f5b99bcd | 20 | static int udplite_rcv(struct sk_buff *skb) |
ba4e58ec | 21 | { |
645ca708 | 22 | return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); |
ba4e58ec GR |
23 | } |
24 | ||
32bbd879 | 25 | static int udplite_err(struct sk_buff *skb, u32 info) |
ba4e58ec | 26 | { |
32bbd879 | 27 | return __udp4_lib_err(skb, info, &udplite_table); |
ba4e58ec GR |
28 | } |
29 | ||
32613090 | 30 | static const struct net_protocol udplite_protocol = { |
ba4e58ec GR |
31 | .handler = udplite_rcv, |
32 | .err_handler = udplite_err, | |
33 | .no_policy = 1, | |
92f1fecb | 34 | .netns_ok = 1, |
ba4e58ec GR |
35 | }; |
36 | ||
37 | struct proto udplite_prot = { | |
38 | .name = "UDP-Lite", | |
39 | .owner = THIS_MODULE, | |
40 | .close = udp_lib_close, | |
41 | .connect = ip4_datagram_connect, | |
42 | .disconnect = udp_disconnect, | |
43 | .ioctl = udp_ioctl, | |
44 | .init = udplite_sk_init, | |
45 | .destroy = udp_destroy_sock, | |
46 | .setsockopt = udp_setsockopt, | |
47 | .getsockopt = udp_getsockopt, | |
48 | .sendmsg = udp_sendmsg, | |
49 | .recvmsg = udp_recvmsg, | |
50 | .sendpage = udp_sendpage, | |
ba4e58ec GR |
51 | .hash = udp_lib_hash, |
52 | .unhash = udp_lib_unhash, | |
8f6b5392 | 53 | .rehash = udp_v4_rehash, |
6ba5a3c5 | 54 | .get_port = udp_v4_get_port, |
c915fe13 PA |
55 | .memory_allocated = &udp_memory_allocated, |
56 | .sysctl_mem = sysctl_udp_mem, | |
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 | |
63 | }; | |
4bc2f18b | 64 | EXPORT_SYMBOL(udplite_prot); |
ba4e58ec GR |
65 | |
66 | static struct inet_protosw udplite4_protosw = { | |
67 | .type = SOCK_DGRAM, | |
68 | .protocol = IPPROTO_UDPLITE, | |
69 | .prot = &udplite_prot, | |
70 | .ops = &inet_dgram_ops, | |
ba4e58ec GR |
71 | .flags = INET_PROTOSW_PERMANENT, |
72 | }; | |
73 | ||
74 | #ifdef CONFIG_PROC_FS | |
ba4e58ec | 75 | static struct udp_seq_afinfo udplite4_seq_afinfo = { |
ba4e58ec | 76 | .family = AF_INET, |
645ca708 | 77 | .udp_table = &udplite_table, |
ba4e58ec | 78 | }; |
ff2bac6a | 79 | |
2c8c1e72 | 80 | static int __net_init udplite4_proc_init_net(struct net *net) |
84c375af | 81 | { |
c3506372 CH |
82 | if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops, |
83 | sizeof(struct udp_iter_state), &udplite4_seq_afinfo)) | |
a3d2599b CH |
84 | return -ENOMEM; |
85 | return 0; | |
84c375af PE |
86 | } |
87 | ||
2c8c1e72 | 88 | static void __net_exit udplite4_proc_exit_net(struct net *net) |
84c375af | 89 | { |
a3d2599b | 90 | remove_proc_entry("udplite", net->proc_net); |
84c375af PE |
91 | } |
92 | ||
93 | static struct pernet_operations udplite4_net_ops = { | |
94 | .init = udplite4_proc_init_net, | |
95 | .exit = udplite4_proc_exit_net, | |
96 | }; | |
97 | ||
ff2bac6a PE |
98 | static __init int udplite4_proc_init(void) |
99 | { | |
84c375af | 100 | return register_pernet_subsys(&udplite4_net_ops); |
ff2bac6a PE |
101 | } |
102 | #else | |
103 | static inline int udplite4_proc_init(void) | |
104 | { | |
105 | return 0; | |
106 | } | |
ba4e58ec GR |
107 | #endif |
108 | ||
109 | void __init udplite4_register(void) | |
110 | { | |
f86dcc5a | 111 | udp_table_init(&udplite_table, "UDP-Lite"); |
ba4e58ec GR |
112 | if (proto_register(&udplite_prot, 1)) |
113 | goto out_register_err; | |
114 | ||
115 | if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0) | |
116 | goto out_unregister_proto; | |
117 | ||
118 | inet_register_protosw(&udplite4_protosw); | |
119 | ||
ff2bac6a | 120 | if (udplite4_proc_init()) |
058bd4d2 | 121 | pr_err("%s: Cannot register /proc!\n", __func__); |
ba4e58ec GR |
122 | return; |
123 | ||
124 | out_unregister_proto: | |
125 | proto_unregister(&udplite_prot); | |
126 | out_register_err: | |
058bd4d2 | 127 | pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__); |
ba4e58ec | 128 | } |