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 130