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 140