1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6. 4 * See also net/ipv4/udplite.c 5 * 6 * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> 7 * 8 * Changes: 9 * Fixes: 10 */ 11 #include <linux/export.h> 12 #include <linux/proc_fs.h> 13 #include "udp_impl.h" 14 15 static int udplitev6_rcv(struct sk_buff *skb) 16 { 17 return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); 18 } 19 20 static int udplitev6_err(struct sk_buff *skb, 21 struct inet6_skb_parm *opt, 22 u8 type, u8 code, int offset, __be32 info) 23 { 24 return __udp6_lib_err(skb, opt, type, code, offset, info, 25 &udplite_table); 26 } 27 28 static const struct inet6_protocol udplitev6_protocol = { 29 .handler = udplitev6_rcv, 30 .err_handler = udplitev6_err, 31 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, 32 }; 33 34 struct proto udplitev6_prot = { 35 .name = "UDPLITEv6", 36 .owner = THIS_MODULE, 37 .close = udp_lib_close, 38 .connect = ip6_datagram_connect, 39 .disconnect = udp_disconnect, 40 .ioctl = udp_ioctl, 41 .init = udplite_sk_init, 42 .destroy = udpv6_destroy_sock, 43 .setsockopt = udpv6_setsockopt, 44 .getsockopt = udpv6_getsockopt, 45 .sendmsg = udpv6_sendmsg, 46 .recvmsg = udpv6_recvmsg, 47 .hash = udp_lib_hash, 48 .unhash = udp_lib_unhash, 49 .rehash = udp_v6_rehash, 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 static struct udp_seq_afinfo udplite6_seq_afinfo = { 96 .family = AF_INET6, 97 .udp_table = &udplite_table, 98 }; 99 100 static int __net_init udplite6_proc_init_net(struct net *net) 101 { 102 if (!proc_create_net_data("udplite6", 0444, net->proc_net, 103 &udp6_seq_ops, sizeof(struct udp_iter_state), 104 &udplite6_seq_afinfo)) 105 return -ENOMEM; 106 return 0; 107 } 108 109 static void __net_exit udplite6_proc_exit_net(struct net *net) 110 { 111 remove_proc_entry("udplite6", net->proc_net); 112 } 113 114 static struct pernet_operations udplite6_net_ops = { 115 .init = udplite6_proc_init_net, 116 .exit = udplite6_proc_exit_net, 117 }; 118 119 int __init udplite6_proc_init(void) 120 { 121 return register_pernet_subsys(&udplite6_net_ops); 122 } 123 124 void udplite6_proc_exit(void) 125 { 126 unregister_pernet_subsys(&udplite6_net_ops); 127 } 128 #endif 129