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 * License: 10 */ 11 #ifndef __LINUX_IF_PPPOX_H 12 #define __LINUX_IF_PPPOX_H 13 14 #include <linux/if.h> 15 #include <linux/netdevice.h> 16 #include <linux/ppp_channel.h> 17 #include <linux/skbuff.h> 18 #include <linux/workqueue.h> 19 #include <uapi/linux/if_pppox.h> 20 21 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) 22 { 23 return (struct pppoe_hdr *)skb_network_header(skb); 24 } 25 26 struct pppoe_opt { 27 struct net_device *dev; /* device associated with socket*/ 28 int ifindex; /* ifindex of device associated with socket */ 29 struct pppoe_addr pa; /* what this socket is bound to*/ 30 struct sockaddr_pppox relay; /* what socket data will be 31 relayed to (PPPoE relaying) */ 32 struct work_struct padt_work;/* Work item for handling PADT */ 33 }; 34 35 struct pptp_opt { 36 struct pptp_addr src_addr; 37 struct pptp_addr dst_addr; 38 u32 ack_sent, ack_recv; 39 u32 seq_sent, seq_recv; 40 int ppp_flags; 41 }; 42 #include <net/sock.h> 43 44 struct pppox_sock { 45 /* struct sock must be the first member of pppox_sock */ 46 struct sock sk; 47 struct ppp_channel chan; 48 struct pppox_sock *next; /* for hash table */ 49 union { 50 struct pppoe_opt pppoe; 51 struct pptp_opt pptp; 52 } proto; 53 __be16 num; 54 }; 55 #define pppoe_dev proto.pppoe.dev 56 #define pppoe_ifindex proto.pppoe.ifindex 57 #define pppoe_pa proto.pppoe.pa 58 #define pppoe_relay proto.pppoe.relay 59 60 static inline struct pppox_sock *pppox_sk(struct sock *sk) 61 { 62 return (struct pppox_sock *)sk; 63 } 64 65 static inline struct sock *sk_pppox(struct pppox_sock *po) 66 { 67 return (struct sock *)po; 68 } 69 70 struct module; 71 72 struct pppox_proto { 73 int (*create)(struct net *net, struct socket *sock, int kern); 74 int (*ioctl)(struct socket *sock, unsigned int cmd, 75 unsigned long arg); 76 struct module *owner; 77 }; 78 79 extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp); 80 extern void unregister_pppox_proto(int proto_num); 81 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ 82 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 83 extern int pppox_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 84 85 #define PPPOEIOCSFWD32 _IOW(0xB1 ,0, compat_size_t) 86 87 /* PPPoX socket states */ 88 enum { 89 PPPOX_NONE = 0, /* initial state */ 90 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ 91 PPPOX_BOUND = 2, /* bound to ppp device */ 92 PPPOX_RELAY = 4, /* forwarding is enabled */ 93 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ 94 }; 95 96 #endif /* !(__LINUX_IF_PPPOX_H) */ 97