^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Changes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Fixes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define pr_fmt(fmt) "UDPLite: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "udp_impl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct udp_table udplite_table __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) EXPORT_SYMBOL(udplite_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int udplite_rcv(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static int udplite_err(struct sk_buff *skb, u32 info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return __udp4_lib_err(skb, info, &udplite_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static const struct net_protocol udplite_protocol = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .handler = udplite_rcv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .err_handler = udplite_err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .no_policy = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .netns_ok = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct proto udplite_prot = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .name = "UDP-Lite",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .close = udp_lib_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .connect = ip4_datagram_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .disconnect = udp_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .ioctl = udp_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .init = udplite_sk_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .destroy = udp_destroy_sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .setsockopt = udp_setsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .getsockopt = udp_getsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .sendmsg = udp_sendmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .recvmsg = udp_recvmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .sendpage = udp_sendpage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .hash = udp_lib_hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .unhash = udp_lib_unhash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .rehash = udp_v4_rehash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .get_port = udp_v4_get_port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .memory_allocated = &udp_memory_allocated,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .sysctl_mem = sysctl_udp_mem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .obj_size = sizeof(struct udp_sock),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .h.udp_table = &udplite_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) EXPORT_SYMBOL(udplite_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static struct inet_protosw udplite4_protosw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .type = SOCK_DGRAM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) .protocol = IPPROTO_UDPLITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .prot = &udplite_prot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .ops = &inet_dgram_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .flags = INET_PROTOSW_PERMANENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static struct udp_seq_afinfo udplite4_seq_afinfo = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .family = AF_INET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .udp_table = &udplite_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int __net_init udplite4_proc_init_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void __net_exit udplite4_proc_exit_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) remove_proc_entry("udplite", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static struct pernet_operations udplite4_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .init = udplite4_proc_init_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .exit = udplite4_proc_exit_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static __init int udplite4_proc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return register_pernet_subsys(&udplite4_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static inline int udplite4_proc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) void __init udplite4_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) udp_table_init(&udplite_table, "UDP-Lite");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (proto_register(&udplite_prot, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) goto out_register_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) goto out_unregister_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) inet_register_protosw(&udplite4_protosw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (udplite4_proc_init())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) pr_err("%s: Cannot register /proc!\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) out_unregister_proto:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) proto_unregister(&udplite_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) out_register_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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