forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
2.9 KiB
123 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828). |
|
* |
|
* Authors: Gerrit Renker <[email protected]> |
|
* |
|
* Changes: |
|
* Fixes: |
|
*/ |
|
|
|
#define pr_fmt(fmt) "UDPLite: " fmt |
|
|
|
#include <linux/export.h> |
|
#include <linux/proc_fs.h> |
|
#include "udp_impl.h" |
|
|
|
struct udp_table udplite_table __read_mostly; |
|
EXPORT_SYMBOL(udplite_table); |
|
|
|
static int udplite_rcv(struct sk_buff *skb) |
|
{ |
|
return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE); |
|
} |
|
|
|
static int udplite_err(struct sk_buff *skb, u32 info) |
|
{ |
|
return __udp4_lib_err(skb, info, &udplite_table); |
|
} |
|
|
|
static const 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, |
|
.hash = udp_lib_hash, |
|
.unhash = udp_lib_unhash, |
|
.rehash = udp_v4_rehash, |
|
.get_port = udp_v4_get_port, |
|
.memory_allocated = &udp_memory_allocated, |
|
.sysctl_mem = sysctl_udp_mem, |
|
.obj_size = sizeof(struct udp_sock), |
|
.h.udp_table = &udplite_table, |
|
}; |
|
EXPORT_SYMBOL(udplite_prot); |
|
|
|
static struct inet_protosw udplite4_protosw = { |
|
.type = SOCK_DGRAM, |
|
.protocol = IPPROTO_UDPLITE, |
|
.prot = &udplite_prot, |
|
.ops = &inet_dgram_ops, |
|
.flags = INET_PROTOSW_PERMANENT, |
|
}; |
|
|
|
#ifdef CONFIG_PROC_FS |
|
static struct udp_seq_afinfo udplite4_seq_afinfo = { |
|
.family = AF_INET, |
|
.udp_table = &udplite_table, |
|
}; |
|
|
|
static int __net_init udplite4_proc_init_net(struct net *net) |
|
{ |
|
if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops, |
|
sizeof(struct udp_iter_state), &udplite4_seq_afinfo)) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
static void __net_exit udplite4_proc_exit_net(struct net *net) |
|
{ |
|
remove_proc_entry("udplite", net->proc_net); |
|
} |
|
|
|
static struct pernet_operations udplite4_net_ops = { |
|
.init = udplite4_proc_init_net, |
|
.exit = udplite4_proc_exit_net, |
|
}; |
|
|
|
static __init int udplite4_proc_init(void) |
|
{ |
|
return register_pernet_subsys(&udplite4_net_ops); |
|
} |
|
#else |
|
static inline int udplite4_proc_init(void) |
|
{ |
|
return 0; |
|
} |
|
#endif |
|
|
|
void __init udplite4_register(void) |
|
{ |
|
udp_table_init(&udplite_table, "UDP-Lite"); |
|
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); |
|
|
|
if (udplite4_proc_init()) |
|
pr_err("%s: Cannot register /proc!\n", __func__); |
|
return; |
|
|
|
out_unregister_proto: |
|
proto_unregister(&udplite_prot); |
|
out_register_err: |
|
pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__); |
|
}
|
|
|