diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/pppox.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/net/pppox.c')
-rw-r--r-- | drivers/net/pppox.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/net/pppox.c b/drivers/net/pppox.c new file mode 100644 index 000000000000..0c1e114527fb --- /dev/null +++ b/drivers/net/pppox.c @@ -0,0 +1,153 @@ +/** -*- linux-c -*- *********************************************************** + * Linux PPP over X/Ethernet (PPPoX/PPPoE) Sockets + * + * PPPoX --- Generic PPP encapsulation socket family + * PPPoE --- PPP over Ethernet (RFC 2516) + * + * + * Version: 0.5.2 + * + * Author: Michal Ostrowski <mostrows@speakeasy.net> + * + * 051000 : Initialization cleanup + * + * License: + * 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 <linux/string.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/netdevice.h> +#include <linux/net.h> +#include <linux/init.h> +#include <linux/if_pppox.h> +#include <linux/ppp_defs.h> +#include <linux/if_ppp.h> +#include <linux/ppp_channel.h> + +#include <net/sock.h> + +#include <asm/uaccess.h> + +static struct pppox_proto *pppox_protos[PX_MAX_PROTO + 1]; + +int register_pppox_proto(int proto_num, struct pppox_proto *pp) +{ + if (proto_num < 0 || proto_num > PX_MAX_PROTO) + return -EINVAL; + if (pppox_protos[proto_num]) + return -EALREADY; + pppox_protos[proto_num] = pp; + return 0; +} + +void unregister_pppox_proto(int proto_num) +{ + if (proto_num >= 0 && proto_num <= PX_MAX_PROTO) + pppox_protos[proto_num] = NULL; +} + +void pppox_unbind_sock(struct sock *sk) +{ + /* Clear connection to ppp device, if attached. */ + + if (sk->sk_state & (PPPOX_BOUND | PPPOX_ZOMBIE)) { + ppp_unregister_channel(&pppox_sk(sk)->chan); + sk->sk_state = PPPOX_DEAD; + } +} + +EXPORT_SYMBOL(register_pppox_proto); +EXPORT_SYMBOL(unregister_pppox_proto); +EXPORT_SYMBOL(pppox_unbind_sock); + +static int pppox_ioctl(struct socket* sock, unsigned int cmd, + unsigned long arg) +{ + struct sock *sk = sock->sk; + struct pppox_sock *po = pppox_sk(sk); + int rc = 0; + + lock_sock(sk); + + switch (cmd) { + case PPPIOCGCHAN: { + int index; + rc = -ENOTCONN; + if (!(sk->sk_state & PPPOX_CONNECTED)) + break; + + rc = -EINVAL; + index = ppp_channel_index(&po->chan); + if (put_user(index , (int __user *) arg)) + break; + + rc = 0; + sk->sk_state |= PPPOX_BOUND; + break; + } + default: + if (pppox_protos[sk->sk_protocol]->ioctl) + rc = pppox_protos[sk->sk_protocol]->ioctl(sock, cmd, + arg); + + break; + }; + + release_sock(sk); + return rc; +} + + +static int pppox_create(struct socket *sock, int protocol) +{ + int rc = -EPROTOTYPE; + + if (protocol < 0 || protocol > PX_MAX_PROTO) + goto out; + + rc = -EPROTONOSUPPORT; + if (!pppox_protos[protocol] || + !try_module_get(pppox_protos[protocol]->owner)) + goto out; + + rc = pppox_protos[protocol]->create(sock); + if (!rc) { + /* We get to set the ioctl handler. */ + /* For everything else, pppox is just a shell. */ + sock->ops->ioctl = pppox_ioctl; + } + module_put(pppox_protos[protocol]->owner); +out: + return rc; +} + +static struct net_proto_family pppox_proto_family = { + .family = PF_PPPOX, + .create = pppox_create, + .owner = THIS_MODULE, +}; + +static int __init pppox_init(void) +{ + return sock_register(&pppox_proto_family); +} + +static void __exit pppox_exit(void) +{ + sock_unregister(PF_PPPOX); +} + +module_init(pppox_init); +module_exit(pppox_exit); + +MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>"); +MODULE_DESCRIPTION("PPP over Ethernet driver (generic socket layer)"); +MODULE_LICENSE("GPL"); |