From cf14a4d06742d59ecb2d837a3f53bb24d1ff9acb Mon Sep 17 00:00:00 2001 From: James Chapman Date: Wed, 27 Jun 2007 15:43:43 -0700 Subject: [L2TP]: Changes to existing ppp and socket kernel headers for L2TP Add struct sockaddr_pppol2tp to carry L2TP-specific address information for the PPPoX (PPPoL2TP) socket. Unfortunately we can't use the union inside struct sockaddr_pppox because the L2TP-specific data is larger than the current size of the union and we must preserve the size of struct sockaddr_pppox for binary compatibility. Also add a PPPIOCGL2TPSTATS ioctl to allow userspace to obtain L2TP counters and state from the kernel. Add new if_pppol2tp.h header. [ Modified to use aligned_u64 in statistics structure -DaveM ] Signed-off-by: James Chapman Signed-off-by: David S. Miller --- include/linux/if_pppox.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'include/linux/if_pppox.h') diff --git a/include/linux/if_pppox.h b/include/linux/if_pppox.h index 6f987be60fe2..25652545ba6e 100644 --- a/include/linux/if_pppox.h +++ b/include/linux/if_pppox.h @@ -27,6 +27,7 @@ #include #include #endif /* __KERNEL__ */ +#include /* For user-space programs to pick up these definitions * which they wouldn't get otherwise without defining __KERNEL__ @@ -50,8 +51,9 @@ struct pppoe_addr{ * Protocols supported by AF_PPPOX */ #define PX_PROTO_OE 0 /* Currently just PPPoE */ -#define PX_MAX_PROTO 1 - +#define PX_PROTO_OL2TP 1 /* Now L2TP also */ +#define PX_MAX_PROTO 2 + struct sockaddr_pppox { sa_family_t sa_family; /* address family, AF_PPPOX */ unsigned int sa_protocol; /* protocol identifier */ @@ -60,6 +62,16 @@ struct sockaddr_pppox { }sa_addr; }__attribute__ ((packed)); +/* The use of the above union isn't viable because the size of this + * struct must stay fixed over time -- applications use sizeof(struct + * sockaddr_pppox) to fill it. We use a protocol specific sockaddr + * type instead. + */ +struct sockaddr_pppol2tp { + sa_family_t sa_family; /* address family, AF_PPPOX */ + unsigned int sa_protocol; /* protocol identifier */ + struct pppol2tp_addr pppol2tp; +}__attribute__ ((packed)); /********************************************************************* * -- cgit v1.2.3-59-g8ed1b