^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) /** -*- linux-c -*- ***********************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Linux PPP over X/Ethernet (PPPoX/PPPoE) Sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * PPPoX --- Generic PPP encapsulation socket family
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * PPPoE --- PPP over Ethernet (RFC 2516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Version: 0.5.2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Author: Michal Ostrowski <mostrows@speakeasy.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * 051000 : Initialization cleanup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * License:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/if_pppox.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/ppp_defs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/ppp-ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/ppp_channel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static const struct pppox_proto *pppox_protos[PX_MAX_PROTO + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int register_pppox_proto(int proto_num, const struct pppox_proto *pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (proto_num < 0 || proto_num > PX_MAX_PROTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (pppox_protos[proto_num])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) pppox_protos[proto_num] = pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) void unregister_pppox_proto(int proto_num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (proto_num >= 0 && proto_num <= PX_MAX_PROTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) pppox_protos[proto_num] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) void pppox_unbind_sock(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* Clear connection to ppp device, if attached. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (sk->sk_state & (PPPOX_BOUND | PPPOX_CONNECTED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ppp_unregister_channel(&pppox_sk(sk)->chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) sk->sk_state = PPPOX_DEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) EXPORT_SYMBOL(register_pppox_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) EXPORT_SYMBOL(unregister_pppox_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) EXPORT_SYMBOL(pppox_unbind_sock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct pppox_sock *po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) case PPPIOCGCHAN: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) rc = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!(sk->sk_state & PPPOX_CONNECTED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) index = ppp_channel_index(&po->chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (put_user(index , (int __user *) arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) sk->sk_state |= PPPOX_BOUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) rc = pppox_protos[sk->sk_protocol]->ioctl ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) pppox_protos[sk->sk_protocol]->ioctl(sock, cmd, arg) : -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) EXPORT_SYMBOL(pppox_ioctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int pppox_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (cmd == PPPOEIOCSFWD32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) cmd = PPPOEIOCSFWD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return pppox_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) EXPORT_SYMBOL(pppox_compat_ioctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static int pppox_create(struct net *net, struct socket *sock, int protocol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int kern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int rc = -EPROTOTYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (protocol < 0 || protocol > PX_MAX_PROTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) rc = -EPROTONOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (!pppox_protos[protocol])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) request_module("net-pf-%d-proto-%d", PF_PPPOX, protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (!pppox_protos[protocol] ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) !try_module_get(pppox_protos[protocol]->owner))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) rc = pppox_protos[protocol]->create(net, sock, kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) module_put(pppox_protos[protocol]->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static const struct net_proto_family pppox_proto_family = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .family = PF_PPPOX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .create = pppox_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int __init pppox_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return sock_register(&pppox_proto_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static void __exit pppox_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) sock_unregister(PF_PPPOX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) module_init(pppox_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) module_exit(pppox_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) MODULE_DESCRIPTION("PPP over Ethernet driver (generic socket layer)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) MODULE_ALIAS_NETPROTO(PF_PPPOX);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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