Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1 | /* |
| 2 | * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828). |
| 3 | * |
| 4 | * Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $ |
| 5 | * |
| 6 | * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> |
| 7 | * |
| 8 | * Changes: |
| 9 | * Fixes: |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation; either version |
| 13 | * 2 of the License, or (at your option) any later version. |
| 14 | */ |
| 15 | #include "udp_impl.h" |
| 16 | DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly; |
| 17 | |
| 18 | struct hlist_head udplite_hash[UDP_HTABLE_SIZE]; |
| 19 | static int udplite_port_rover; |
| 20 | |
Adrian Bunk | f5b99bc | 2006-11-30 17:22:29 -0800 | [diff] [blame] | 21 | int udplite_get_port(struct sock *sk, unsigned short p, |
David S. Miller | fc03841 | 2007-05-09 16:42:20 -0700 | [diff] [blame] | 22 | const struct udp_get_port_ops *ops) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 23 | { |
David S. Miller | fc03841 | 2007-05-09 16:42:20 -0700 | [diff] [blame] | 24 | return __udp_lib_get_port(sk, p, udplite_hash, |
| 25 | &udplite_port_rover, ops); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 26 | } |
| 27 | |
Adrian Bunk | f5b99bc | 2006-11-30 17:22:29 -0800 | [diff] [blame] | 28 | static int udplite_v4_get_port(struct sock *sk, unsigned short snum) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 29 | { |
David S. Miller | fc03841 | 2007-05-09 16:42:20 -0700 | [diff] [blame] | 30 | return udplite_get_port(sk, snum, &udp_ipv4_ops); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 31 | } |
| 32 | |
Adrian Bunk | f5b99bc | 2006-11-30 17:22:29 -0800 | [diff] [blame] | 33 | static int udplite_rcv(struct sk_buff *skb) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 34 | { |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 35 | return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 36 | } |
| 37 | |
Adrian Bunk | f5b99bc | 2006-11-30 17:22:29 -0800 | [diff] [blame] | 38 | static void udplite_err(struct sk_buff *skb, u32 info) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 39 | { |
| 40 | return __udp4_lib_err(skb, info, udplite_hash); |
| 41 | } |
| 42 | |
| 43 | static struct net_protocol udplite_protocol = { |
| 44 | .handler = udplite_rcv, |
| 45 | .err_handler = udplite_err, |
| 46 | .no_policy = 1, |
| 47 | }; |
| 48 | |
| 49 | struct proto udplite_prot = { |
| 50 | .name = "UDP-Lite", |
| 51 | .owner = THIS_MODULE, |
| 52 | .close = udp_lib_close, |
| 53 | .connect = ip4_datagram_connect, |
| 54 | .disconnect = udp_disconnect, |
| 55 | .ioctl = udp_ioctl, |
| 56 | .init = udplite_sk_init, |
| 57 | .destroy = udp_destroy_sock, |
| 58 | .setsockopt = udp_setsockopt, |
| 59 | .getsockopt = udp_getsockopt, |
| 60 | .sendmsg = udp_sendmsg, |
| 61 | .recvmsg = udp_recvmsg, |
| 62 | .sendpage = udp_sendpage, |
| 63 | .backlog_rcv = udp_queue_rcv_skb, |
| 64 | .hash = udp_lib_hash, |
| 65 | .unhash = udp_lib_unhash, |
| 66 | .get_port = udplite_v4_get_port, |
| 67 | .obj_size = sizeof(struct udp_sock), |
| 68 | #ifdef CONFIG_COMPAT |
| 69 | .compat_setsockopt = compat_udp_setsockopt, |
| 70 | .compat_getsockopt = compat_udp_getsockopt, |
| 71 | #endif |
| 72 | }; |
| 73 | |
| 74 | static struct inet_protosw udplite4_protosw = { |
| 75 | .type = SOCK_DGRAM, |
| 76 | .protocol = IPPROTO_UDPLITE, |
| 77 | .prot = &udplite_prot, |
| 78 | .ops = &inet_dgram_ops, |
| 79 | .capability = -1, |
| 80 | .no_check = 0, /* must checksum (RFC 3828) */ |
| 81 | .flags = INET_PROTOSW_PERMANENT, |
| 82 | }; |
| 83 | |
| 84 | #ifdef CONFIG_PROC_FS |
| 85 | static struct file_operations udplite4_seq_fops; |
| 86 | static struct udp_seq_afinfo udplite4_seq_afinfo = { |
| 87 | .owner = THIS_MODULE, |
| 88 | .name = "udplite", |
| 89 | .family = AF_INET, |
| 90 | .hashtable = udplite_hash, |
| 91 | .seq_show = udp4_seq_show, |
| 92 | .seq_fops = &udplite4_seq_fops, |
| 93 | }; |
| 94 | #endif |
| 95 | |
| 96 | void __init udplite4_register(void) |
| 97 | { |
| 98 | if (proto_register(&udplite_prot, 1)) |
| 99 | goto out_register_err; |
| 100 | |
| 101 | if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0) |
| 102 | goto out_unregister_proto; |
| 103 | |
| 104 | inet_register_protosw(&udplite4_protosw); |
| 105 | |
| 106 | #ifdef CONFIG_PROC_FS |
| 107 | if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */ |
| 108 | printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__); |
| 109 | #endif |
| 110 | return; |
| 111 | |
| 112 | out_unregister_proto: |
| 113 | proto_unregister(&udplite_prot); |
| 114 | out_register_err: |
| 115 | printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__); |
| 116 | } |
| 117 | |
| 118 | EXPORT_SYMBOL(udplite_hash); |
| 119 | EXPORT_SYMBOL(udplite_prot); |
| 120 | EXPORT_SYMBOL(udplite_get_port); |