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 int udplitev6_err(struct sk_buff *skb, 24 struct inet6_skb_parm *opt, 25 u8 type, u8 code, int offset, __be32 info) 26 { 27 return __udp6_lib_err(skb, opt, type, code, offset, info, 28 &udplite_table); 29 } 30 31 static const struct inet6_protocol udplitev6_protocol = { 32 .handler = udplitev6_rcv, 33 .err_handler = udplitev6_err, 34 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 35 }; 36 37 struct proto udplitev6_prot = { 38 .name = "UDPLITEv6", 39 .owner = THIS_MODULE, 40 .close = udp_lib_close, 41 .connect = ip6_datagram_connect, 42 .disconnect = udp_disconnect, 43 .ioctl = udp_ioctl, 44 .init = udplite_sk_init, 45 .destroy = udpv6_destroy_sock, 46 .setsockopt = udpv6_setsockopt, 47 .getsockopt = udpv6_getsockopt, 48 .sendmsg = udpv6_sendmsg, 49 .recvmsg = udpv6_recvmsg, 50 .hash = udp_lib_hash, 51 .unhash = udp_lib_unhash, 52 .rehash = udp_v6_rehash, 53 .get_port = udp_v6_get_port, 54 .memory_allocated = &udp_memory_allocated, 55 .sysctl_mem = sysctl_udp_mem, 56 .obj_size = sizeof(struct udp6_sock), 57 .h.udp_table = &udplite_table, 58 #ifdef CONFIG_COMPAT 59 .compat_setsockopt = compat_udpv6_setsockopt, 60 .compat_getsockopt = compat_udpv6_getsockopt, 61 #endif 62 }; 63 64 static struct inet_protosw udplite6_protosw = { 65 .type = SOCK_DGRAM, 66 .protocol = IPPROTO_UDPLITE, 67 .prot = &udplitev6_prot, 68 .ops = &inet6_dgram_ops, 69 .flags = INET_PROTOSW_PERMANENT, 70 }; 71 72 int __init udplitev6_init(void) 73 { 74 int ret; 75 76 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); 77 if (ret) 78 goto out; 79 80 ret = inet6_register_protosw(&udplite6_protosw); 81 if (ret) 82 goto out_udplitev6_protocol; 83 out: 84 return ret; 85 86 out_udplitev6_protocol: 87 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); 88 goto out; 89 } 90 91 void udplitev6_exit(void) 92 { 93 inet6_unregister_protosw(&udplite6_protosw); 94 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); 95 } 96 97 #ifdef CONFIG_PROC_FS 98 static struct udp_seq_afinfo udplite6_seq_afinfo = { 99 .family = AF_INET6, 100 .udp_table = &udplite_table, 101 }; 102 103 static int __net_init udplite6_proc_init_net(struct net *net) 104 { 105 if (!proc_create_net_data("udplite6", 0444, net->proc_net, 106 &udp6_seq_ops, sizeof(struct udp_iter_state), 107 &udplite6_seq_afinfo)) 108 return -ENOMEM; 109 return 0; 110 } 111 112 static void __net_exit udplite6_proc_exit_net(struct net *net) 113 { 114 remove_proc_entry("udplite6", net->proc_net); 115 } 116 117 static struct pernet_operations udplite6_net_ops = { 118 .init = udplite6_proc_init_net, 119 .exit = udplite6_proc_exit_net, 120 }; 121 122 int __init udplite6_proc_init(void) 123 { 124 return register_pernet_subsys(&udplite6_net_ops); 125 } 126 127 void udplite6_proc_exit(void) 128 { 129 unregister_pernet_subsys(&udplite6_net_ops); 130 } 131 #endif 132