/* * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828). * * Version: $Id: udplite.c,v 1.25 2006/10/19 07:22:36 gerrit Exp $ * * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk> * * Changes: * Fixes: * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include "udp_impl.h" DEFINE_SNMP_STAT(struct udp_mib, udplite_statistics) __read_mostly; struct hlist_head udplite_hash[UDP_HTABLE_SIZE]; static int udplite_port_rover; int udplite_get_port(struct sock *sk, unsigned short p, int (*c)(const struct sock *, const struct sock *)) { return __udp_lib_get_port(sk, p, udplite_hash, &udplite_port_rover, c); } static int udplite_v4_get_port(struct sock *sk, unsigned short snum) { return udplite_get_port(sk, snum, ipv4_rcv_saddr_equal); } static int udplite_rcv(struct sk_buff *skb) { return __udp4_lib_rcv(skb, udplite_hash, 1); } static void udplite_err(struct sk_buff *skb, u32 info) { return __udp4_lib_err(skb, info, udplite_hash); } static struct net_protocol udplite_protocol = { .handler = udplite_rcv, .err_handler = udplite_err, .no_policy = 1, }; struct proto udplite_prot = { .name = "UDP-Lite", .owner = THIS_MODULE, .close = udp_lib_close, .connect = ip4_datagram_connect, .disconnect = udp_disconnect, .ioctl = udp_ioctl, .init = udplite_sk_init, .destroy = udp_destroy_sock, .setsockopt = udp_setsockopt, .getsockopt = udp_getsockopt, .sendmsg = udp_sendmsg, .recvmsg = udp_recvmsg, .sendpage = udp_sendpage, .backlog_rcv = udp_queue_rcv_skb, .hash = udp_lib_hash, .unhash = udp_lib_unhash, .get_port = udplite_v4_get_port, .obj_size = sizeof(struct udp_sock), #ifdef CONFIG_COMPAT .compat_setsockopt = compat_udp_setsockopt, .compat_getsockopt = compat_udp_getsockopt, #endif }; static struct inet_protosw udplite4_protosw = { .type = SOCK_DGRAM, .protocol = IPPROTO_UDPLITE, .prot = &udplite_prot, .ops = &inet_dgram_ops, .capability = -1, .no_check = 0, /* must checksum (RFC 3828) */ .flags = INET_PROTOSW_PERMANENT, }; #ifdef CONFIG_PROC_FS static struct file_operations udplite4_seq_fops; static struct udp_seq_afinfo udplite4_seq_afinfo = { .owner = THIS_MODULE, .name = "udplite", .family = AF_INET, .hashtable = udplite_hash, .seq_show = udp4_seq_show, .seq_fops = &udplite4_seq_fops, }; #endif void __init udplite4_register(void) { if (proto_register(&udplite_prot, 1)) goto out_register_err; if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0) goto out_unregister_proto; inet_register_protosw(&udplite4_protosw); #ifdef CONFIG_PROC_FS if (udp_proc_register(&udplite4_seq_afinfo)) /* udplite4_proc_init() */ printk(KERN_ERR "%s: Cannot register /proc!\n", __FUNCTION__); #endif return; out_unregister_proto: proto_unregister(&udplite_prot); out_register_err: printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__); } EXPORT_SYMBOL(udplite_hash); EXPORT_SYMBOL(udplite_prot); EXPORT_SYMBOL(udplite_get_port);