| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 <linux/proc_fs.h> |
| 16 | #include "udp_impl.h" |
| 17 | |
| 18 | static int udplitev6_rcv(struct sk_buff *skb) |
| 19 | { |
| 20 | return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); |
| 21 | } |
| 22 | |
| 23 | static void udplitev6_err(struct sk_buff *skb, |
| 24 | struct inet6_skb_parm *opt, |
| 25 | u8 type, u8 code, int offset, __be32 info) |
| 26 | { |
| 27 | __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table); |
| 28 | } |
| 29 | |
| 30 | static const struct inet6_protocol udplitev6_protocol = { |
| 31 | .handler = udplitev6_rcv, |
| 32 | .err_handler = udplitev6_err, |
| 33 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
| 34 | }; |
| 35 | |
| 36 | struct proto udplitev6_prot = { |
| 37 | .name = "UDPLITEv6", |
| 38 | .owner = THIS_MODULE, |
| 39 | .close = udp_lib_close, |
| 40 | .connect = ip6_datagram_connect, |
| 41 | .disconnect = udp_disconnect, |
| 42 | .ioctl = udp_ioctl, |
| 43 | .init = udplite_sk_init, |
| 44 | .destroy = udpv6_destroy_sock, |
| 45 | .setsockopt = udpv6_setsockopt, |
| 46 | .getsockopt = udpv6_getsockopt, |
| 47 | .sendmsg = udpv6_sendmsg, |
| 48 | .recvmsg = udpv6_recvmsg, |
| 49 | .hash = udp_lib_hash, |
| 50 | .unhash = udp_lib_unhash, |
| 51 | .get_port = udp_v6_get_port, |
| 52 | .memory_allocated = &udp_memory_allocated, |
| 53 | .sysctl_mem = sysctl_udp_mem, |
| 54 | .obj_size = sizeof(struct udp6_sock), |
| 55 | .h.udp_table = &udplite_table, |
| 56 | #ifdef CONFIG_COMPAT |
| 57 | .compat_setsockopt = compat_udpv6_setsockopt, |
| 58 | .compat_getsockopt = compat_udpv6_getsockopt, |
| 59 | #endif |
| 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 | static struct udp_seq_afinfo udplite6_seq_afinfo = { |
| 97 | .family = AF_INET6, |
| 98 | .udp_table = &udplite_table, |
| 99 | }; |
| 100 | |
| 101 | static int __net_init udplite6_proc_init_net(struct net *net) |
| 102 | { |
| 103 | if (!proc_create_net_data("udplite6", 0444, net->proc_net, |
| 104 | &udp6_seq_ops, sizeof(struct udp_iter_state), |
| 105 | &udplite6_seq_afinfo)) |
| 106 | return -ENOMEM; |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static void __net_exit udplite6_proc_exit_net(struct net *net) |
| 111 | { |
| 112 | remove_proc_entry("udplite6", net->proc_net); |
| 113 | } |
| 114 | |
| 115 | static struct pernet_operations udplite6_net_ops = { |
| 116 | .init = udplite6_proc_init_net, |
| 117 | .exit = udplite6_proc_exit_net, |
| 118 | }; |
| 119 | |
| 120 | int __init udplite6_proc_init(void) |
| 121 | { |
| 122 | return register_pernet_subsys(&udplite6_net_ops); |
| 123 | } |
| 124 | |
| 125 | void udplite6_proc_exit(void) |
| 126 | { |
| 127 | unregister_pernet_subsys(&udplite6_net_ops); |
| 128 | } |
| 129 | #endif |