xref: /kernel/linux/linux-5.10/include/net/compat.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef NET_COMPAT_H
#define NET_COMPAT_H


struct sock;

#if defined(CONFIG_COMPAT)

#include <linux/compat.h>

struct compat_msghdr {
	compat_uptr_t	msg_name;	/* void * */
	compat_int_t	msg_namelen;
	compat_uptr_t	msg_iov;	/* struct compat_iovec * */
	compat_size_t	msg_iovlen;
	compat_uptr_t	msg_control;	/* void * */
	compat_size_t	msg_controllen;
	compat_uint_t	msg_flags;
};

struct compat_mmsghdr {
	struct compat_msghdr msg_hdr;
	compat_uint_t        msg_len;
};

struct compat_cmsghdr {
	compat_size_t	cmsg_len;
	compat_int_t	cmsg_level;
	compat_int_t	cmsg_type;
};

struct compat_rtentry {
	u32		rt_pad1;
	struct sockaddr rt_dst;         /* target address               */
	struct sockaddr rt_gateway;     /* gateway addr (RTF_GATEWAY)   */
	struct sockaddr rt_genmask;     /* target network mask (IP)     */
	unsigned short	rt_flags;
	short		rt_pad2;
	u32		rt_pad3;
	unsigned char	rt_tos;
	unsigned char	rt_class;
	short		rt_pad4;
	short		rt_metric;      /* +1 for binary compatibility! */
	compat_uptr_t	rt_dev;         /* forcing the device at add    */
	u32		rt_mtu;         /* per route MTU/Window         */
	u32		rt_window;      /* Window clamping              */
	unsigned short  rt_irtt;        /* Initial RTT                  */
};

#else /* defined(CONFIG_COMPAT) */
/*
 * To avoid compiler warnings:
 */
#define compat_msghdr	msghdr
#define compat_mmsghdr	mmsghdr
#endif /* defined(CONFIG_COMPAT) */

int __get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg,
			struct sockaddr __user **save_addr, compat_uptr_t *ptr,
			compat_size_t *len);
int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *,
		      struct sockaddr __user **, struct iovec **);
int put_cmsg_compat(struct msghdr*, int, int, int, void *);

int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *,
				     unsigned char *, int);

struct compat_group_req {
	__u32				 gr_interface;
	struct __kernel_sockaddr_storage gr_group
		__aligned(4);
} __packed;

struct compat_group_source_req {
	__u32				 gsr_interface;
	struct __kernel_sockaddr_storage gsr_group
		__aligned(4);
	struct __kernel_sockaddr_storage gsr_source
		__aligned(4);
} __packed;

struct compat_group_filter {
	__u32				 gf_interface;
	struct __kernel_sockaddr_storage gf_group
		__aligned(4);
	__u32				 gf_fmode;
	__u32				 gf_numsrc;
	struct __kernel_sockaddr_storage gf_slist[1]
		__aligned(4);
} __packed;

#endif /* NET_COMPAT_H */