1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /*************************************************************************** 3 * Linux PPP over X - Generic PPP transport layer sockets 4 * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) 5 * 6 * This file supplies definitions required by the PPP over Ethernet driver 7 * (pppox.c). All version information wrt this file is located in pppox.c 8 */ 9 #ifndef __LINUX_IF_PPPOX_H 10 #define __LINUX_IF_PPPOX_H 11 12 #include <linux/if.h> 13 #include <linux/netdevice.h> 14 #include <linux/ppp_channel.h> 15 #include <linux/skbuff.h> 16 #include <linux/workqueue.h> 17 #include <uapi/linux/if_pppox.h> 18 19 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) 20 { 21 return (struct pppoe_hdr *)skb_network_header(skb); 22 } 23 24 struct pppoe_opt { 25 struct net_device *dev; /* device associated with socket*/ 26 int ifindex; /* ifindex of device associated with socket */ 27 struct pppoe_addr pa; /* what this socket is bound to*/ 28 struct work_struct padt_work;/* Work item for handling PADT */ 29 }; 30 31 struct pptp_opt { 32 struct pptp_addr src_addr; 33 struct pptp_addr dst_addr; 34 u32 ack_sent, ack_recv; 35 u32 seq_sent, seq_recv; 36 int ppp_flags; 37 }; 38 #include <net/sock.h> 39 40 struct pppox_sock { 41 /* struct sock must be the first member of pppox_sock */ 42 struct sock sk; 43 struct ppp_channel chan; 44 struct pppox_sock __rcu *next; /* for hash table */ 45 union { 46 struct pppoe_opt pppoe; 47 struct pptp_opt pptp; 48 } proto; 49 __be16 num; 50 }; 51 #define pppoe_dev proto.pppoe.dev 52 #define pppoe_ifindex proto.pppoe.ifindex 53 #define pppoe_pa proto.pppoe.pa 54 55 static inline struct pppox_sock *pppox_sk(struct sock *sk) 56 { 57 return container_of(sk, struct pppox_sock, sk); 58 } 59 60 struct module; 61 62 struct pppox_proto { 63 int (*create)(struct net *net, struct socket *sock, int kern); 64 int (*ioctl)(struct socket *sock, unsigned int cmd, 65 unsigned long arg); 66 struct module *owner; 67 }; 68 69 extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp); 70 extern void unregister_pppox_proto(int proto_num); 71 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ 72 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 73 extern int pppox_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 74 75 /* PPPoX socket states */ 76 enum { 77 PPPOX_NONE = 0, /* initial state */ 78 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ 79 PPPOX_BOUND = 2, /* bound to ppp device */ 80 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ 81 }; 82 83 #endif /* !(__LINUX_IF_PPPOX_H) */ 84