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 .hash = udp_lib_hash, 49 .unhash = udp_lib_unhash, 50 .get_port = udp_v6_get_port, 51 .memory_allocated = &udp_memory_allocated, 52 .sysctl_mem = sysctl_udp_mem, 53 .obj_size = sizeof(struct udp6_sock), 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 }; 60 61 static struct inet_protosw udplite6_protosw = { 62 .type = SOCK_DGRAM, 63 .protocol = IPPROTO_UDPLITE, 64 .prot = &udplitev6_prot, 65 .ops = &inet6_dgram_ops, 66 .flags = INET_PROTOSW_PERMANENT, 67 }; 68 69 int __init udplitev6_init(void) 70 { 71 int ret; 72 73 ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); 74 if (ret) 75 goto out; 76 77 ret = inet6_register_protosw(&udplite6_protosw); 78 if (ret) 79 goto out_udplitev6_protocol; 80 out: 81 return ret; 82 83 out_udplitev6_protocol: 84 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); 85 goto out; 86 } 87 88 void udplitev6_exit(void) 89 { 90 inet6_unregister_protosw(&udplite6_protosw); 91 inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE); 92 } 93 94 #ifdef CONFIG_PROC_FS 95 96 static const struct file_operations udplite6_afinfo_seq_fops = { 97 .open = udp_seq_open, 98 .read = seq_read, 99 .llseek = seq_lseek, 100 .release = seq_release_net 101 }; 102 103 static struct udp_seq_afinfo udplite6_seq_afinfo = { 104 .name = "udplite6", 105 .family = AF_INET6, 106 .udp_table = &udplite_table, 107 .seq_fops = &udplite6_afinfo_seq_fops, 108 .seq_ops = { 109 .show = udp6_seq_show, 110 }, 111 }; 112 113 static int __net_init udplite6_proc_init_net(struct net *net) 114 { 115 return udp_proc_register(net, &udplite6_seq_afinfo); 116 } 117 118 static void __net_exit udplite6_proc_exit_net(struct net *net) 119 { 120 udp_proc_unregister(net, &udplite6_seq_afinfo); 121 } 122 123 static struct pernet_operations udplite6_net_ops = { 124 .init = udplite6_proc_init_net, 125 .exit = udplite6_proc_exit_net, 126 }; 127 128 int __init udplite6_proc_init(void) 129 { 130 return register_pernet_subsys(&udplite6_net_ops); 131 } 132 133 void udplite6_proc_exit(void) 134 { 135 unregister_pernet_subsys(&udplite6_net_ops); 136 } 137 #endif 138