| 1 | /*************************************************************************** |
| 2 | * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661) |
| 3 | * |
| 4 | * This file supplies definitions required by the PPP over L2TP driver |
| 5 | * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c |
| 6 | * |
| 7 | * License: |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #ifndef __LINUX_IF_PPPOL2TP_H |
| 16 | #define __LINUX_IF_PPPOL2TP_H |
| 17 | |
| 18 | #include <linux/types.h> |
| 19 | |
| 20 | #ifdef __KERNEL__ |
| 21 | #include <linux/in.h> |
| 22 | #endif |
| 23 | |
| 24 | /* Structure used to connect() the socket to a particular tunnel UDP |
| 25 | * socket. |
| 26 | */ |
| 27 | struct pppol2tp_addr { |
| 28 | __kernel_pid_t pid; /* pid that owns the fd. |
| 29 | * 0 => current */ |
| 30 | int fd; /* FD of UDP socket to use */ |
| 31 | |
| 32 | struct sockaddr_in addr; /* IP address and port to send to */ |
| 33 | |
| 34 | __u16 s_tunnel, s_session; /* For matching incoming packets */ |
| 35 | __u16 d_tunnel, d_session; /* For sending outgoing packets */ |
| 36 | }; |
| 37 | |
| 38 | /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 |
| 39 | * bits. So we need a different sockaddr structure. |
| 40 | */ |
| 41 | struct pppol2tpv3_addr { |
| 42 | pid_t pid; /* pid that owns the fd. |
| 43 | * 0 => current */ |
| 44 | int fd; /* FD of UDP or IP socket to use */ |
| 45 | |
| 46 | struct sockaddr_in addr; /* IP address and port to send to */ |
| 47 | |
| 48 | __u32 s_tunnel, s_session; /* For matching incoming packets */ |
| 49 | __u32 d_tunnel, d_session; /* For sending outgoing packets */ |
| 50 | }; |
| 51 | |
| 52 | /* Socket options: |
| 53 | * DEBUG - bitmask of debug message categories |
| 54 | * SENDSEQ - 0 => don't send packets with sequence numbers |
| 55 | * 1 => send packets with sequence numbers |
| 56 | * RECVSEQ - 0 => receive packet sequence numbers are optional |
| 57 | * 1 => drop receive packets without sequence numbers |
| 58 | * LNSMODE - 0 => act as LAC. |
| 59 | * 1 => act as LNS. |
| 60 | * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. |
| 61 | */ |
| 62 | enum { |
| 63 | PPPOL2TP_SO_DEBUG = 1, |
| 64 | PPPOL2TP_SO_RECVSEQ = 2, |
| 65 | PPPOL2TP_SO_SENDSEQ = 3, |
| 66 | PPPOL2TP_SO_LNSMODE = 4, |
| 67 | PPPOL2TP_SO_REORDERTO = 5, |
| 68 | }; |
| 69 | |
| 70 | /* Debug message categories for the DEBUG socket option */ |
| 71 | enum { |
| 72 | PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if |
| 73 | * compiled in) */ |
| 74 | PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel |
| 75 | * interface */ |
| 76 | PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */ |
| 77 | PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */ |
| 78 | }; |
| 79 | |
| 80 | |
| 81 | |
| 82 | #endif |