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1 | /* | |
2 | * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6. | |
3 | * See also net/ipv4/udplite.c | |
4 | * | |
5 | * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> | |
6 | * | |
7 | * Changes: | |
8 | * Fixes: | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | #include <linux/export.h> | |
15 | #include "udp_impl.h" | |
16 | ||
17 | static int udplitev6_rcv(struct sk_buff *skb) | |
18 | { | |
19 | return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); | |
20 | } | |
21 | ||
22 | static void udplitev6_err(struct sk_buff *skb, | |
23 | struct inet6_skb_parm *opt, | |
24 | u8 type, u8 code, int offset, __be32 info) | |
25 | { | |
26 | __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table); | |
27 | } | |
28 | ||
29 | static const struct inet6_protocol udplitev6_protocol = { | |
30 | .handler = udplitev6_rcv, | |
31 | .err_handler = udplitev6_err, | |
32 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
33 | }; | |
34 | ||
35 | struct proto udplitev6_prot = { | |
36 | .name = "UDPLITEv6", | |
37 | .owner = THIS_MODULE, | |
38 | .close = udp_lib_close, | |
39 | .connect = ip6_datagram_connect, | |
40 | .disconnect = udp_disconnect, | |
41 | .ioctl = udp_ioctl, | |
42 | .init = udplite_sk_init, | |
43 | .destroy = udpv6_destroy_sock, | |
44 | .setsockopt = udpv6_setsockopt, | |
45 | .getsockopt = udpv6_getsockopt, | |
46 | .sendmsg = udpv6_sendmsg, | |
47 | .recvmsg = udpv6_recvmsg, | |
48 | .backlog_rcv = udpv6_queue_rcv_skb, | |
49 | .hash = udp_lib_hash, | |
50 | .unhash = udp_lib_unhash, | |
51 | .get_port = udp_v6_get_port, | |
52 | .obj_size = sizeof(struct udp6_sock), | |
53 | .slab_flags = SLAB_DESTROY_BY_RCU, | |
54 | .h.udp_table = &udplite_table, | |
55 | #ifdef CONFIG_COMPAT | |
56 | .compat_setsockopt = compat_udpv6_setsockopt, | |
57 | .compat_getsockopt = compat_udpv6_getsockopt, | |
58 | #endif | |
59 | .clear_sk = udp_v6_clear_sk, | |
60 | }; | |
61 | ||
62 | static struct inet_protosw udplite6_protosw = { | |
63 | .type = SOCK_DGRAM, | |
64 | .protocol = IPPROTO_UDPLITE, | |
65 | .prot = &udplitev6_prot, | |
66 | .ops = &inet6_dgram_ops, | |
67 | .flags = INET_PROTOSW_PERMANENT, | |
68 | }; | |
69 | ||
70 | int __init udplitev6_init(void) | |
71 | { | |
72 | int ret; | |
73 | ||
74 | ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); | |
75 | if (ret) | |
76 | goto out; | |
77 | ||
78 | ret = inet6_register_protosw(&udplite6_protosw); | |
79 | if (ret) | |
80 | goto out_udplitev6_protocol; | |
81 | out: | |
82 | return ret; | |
83 | ||
84 | out_udplitev6_protocol: | |
85 | inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); | |
86 | goto out; | |
87 | } | |
88 | ||
89 | void udplitev6_exit(void) | |
90 | { | |
91 | inet6_unregister_protosw(&udplite6_protosw); | |
92 | inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); | |
93 | } | |
94 | ||
95 | #ifdef CONFIG_PROC_FS | |
96 | ||
97 | static const struct file_operations udplite6_afinfo_seq_fops = { | |
98 | .owner = THIS_MODULE, | |
99 | .open = udp_seq_open, | |
100 | .read = seq_read, | |
101 | .llseek = seq_lseek, | |
102 | .release = seq_release_net | |
103 | }; | |
104 | ||
105 | static struct udp_seq_afinfo udplite6_seq_afinfo = { | |
106 | .name = "udplite6", | |
107 | .family = AF_INET6, | |
108 | .udp_table = &udplite_table, | |
109 | .seq_fops = &udplite6_afinfo_seq_fops, | |
110 | .seq_ops = { | |
111 | .show = udp6_seq_show, | |
112 | }, | |
113 | }; | |
114 | ||
115 | static int __net_init udplite6_proc_init_net(struct net *net) | |
116 | { | |
117 | return udp_proc_register(net, &udplite6_seq_afinfo); | |
118 | } | |
119 | ||
120 | static void __net_exit udplite6_proc_exit_net(struct net *net) | |
121 | { | |
122 | udp_proc_unregister(net, &udplite6_seq_afinfo); | |
123 | } | |
124 | ||
125 | static struct pernet_operations udplite6_net_ops = { | |
126 | .init = udplite6_proc_init_net, | |
127 | .exit = udplite6_proc_exit_net, | |
128 | }; | |
129 | ||
130 | int __init udplite6_proc_init(void) | |
131 | { | |
132 | return register_pernet_subsys(&udplite6_net_ops); | |
133 | } | |
134 | ||
135 | void udplite6_proc_exit(void) | |
136 | { | |
137 | unregister_pernet_subsys(&udplite6_net_ops); | |
138 | } | |
139 | #endif |