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