flowlabel.h

linux下traceroute的实现

/*
   It is just a stripped copy of the kernel header "linux/in6.h"

   "Flow label" things are still not defined in "netinet/in*.h" headers,
   but we cannot use "linux/in6.h" immediately because it currently
   conflicts with "netinet/in.h" .
*/

struct in6_flowlabel_req
{
	struct in6_addr	flr_dst;
	__u32	flr_label;
	__u8	flr_action;
	__u8	flr_share;
	__u16	flr_flags;
	__u16 	flr_expires;
	__u16	flr_linger;
	__u32	__flr_pad;
	/* Options in format of IPV6_PKTOPTIONS */
};

#define IPV6_FL_A_GET	0
#define IPV6_FL_A_PUT	1
#define IPV6_FL_A_RENEW	2

#define IPV6_FL_F_CREATE	1
#define IPV6_FL_F_EXCL		2

#define IPV6_FL_S_NONE		0
#define IPV6_FL_S_EXCL		1
#define IPV6_FL_S_PROCESS	2
#define IPV6_FL_S_USER		3
#define IPV6_FL_S_ANY		255

#define IPV6_FLOWINFO_FLOWLABEL		0x000fffff
#define IPV6_FLOWINFO_PRIORITY		0x0ff00000

#define IPV6_FLOWLABEL_MGR	32
#define IPV6_FLOWINFO_SEND	33