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View File Name : errqueue.h

#ifndef _LINUX_ERRQUEUE_H
#define _LINUX_ERRQUEUE_H

#include <linux/types.h>

struct sock_extended_err {
	__u32	ee_errno;	
	__u8	ee_origin;
	__u8	ee_type;
	__u8	ee_code;
	__u8	ee_pad;
	__u32   ee_info;
	__u32   ee_data;
};

#define SO_EE_ORIGIN_NONE	0
#define SO_EE_ORIGIN_LOCAL	1
#define SO_EE_ORIGIN_ICMP	2
#define SO_EE_ORIGIN_ICMP6	3
#define SO_EE_ORIGIN_TXSTATUS	4
#define SO_EE_ORIGIN_TIMESTAMPING SO_EE_ORIGIN_TXSTATUS

#define SO_EE_OFFENDER(ee)	((struct sockaddr*)((ee)+1))

/**
 *	struct scm_timestamping - timestamps exposed through cmsg
 *
 *	The timestamping interfaces SO_TIMESTAMPING, MSG_TSTAMP_*
 *	communicate network timestamps by passing this struct in a cmsg with
 *	recvmsg(). See Documentation/networking/timestamping.txt for details.
 */
struct scm_timestamping {
	struct timespec ts[3];
};

/* The type of scm_timestamping, passed in sock_extended_err ee_info.
 * This defines the type of ts[0]. For SCM_TSTAMP_SND only, if ts[0]
 * is zero, then this is a hardware timestamp and recorded in ts[2].
 */
enum {
	SCM_TSTAMP_SND,		/* driver passed skb to NIC, or HW */
};

#endif /* _LINUX_ERRQUEUE_H */