The netlink_diag can be built as a module, just like it's done in unix sockets. The core dumping message carries the basic info about netlink sockets: family, type and protocol, portis, dst_group, dst_portid, state. Groups can be received as an optional parameter NETLINK_DIAG_GROUPS. Netlink sockets cab be filtered by protocols. The socket inode number and cookie is reserved for future per-socket info retrieving. The per-protocol filtering is also reserved for future by requiring the sdiag_protocol to be zero. The file /proc/net/netlink doesn't provide enough information for dumping netlink sockets. It doesn't provide dst_group, dst_portid, groups above 32. v2: fix NETLINK_DIAG_MAX. Now it's equal to the last constant.
Showing the changes to include/uapi/linux (1 of 5 files). Show all
Unified · Split
| @@ -0,0 +1,42 @@ | ||
| 1 | +#ifndef __NETLINK_DIAG_H__ | |
| 2 | +#define __NETLINK_DIAG_H__ | |
| 3 | + | |
| 4 | +#include <linux/types.h> | |
| 5 | + | |
| 6 | +struct netlink_diag_req { | |
| 7 | + __u8 sdiag_family; | |
| 8 | + __u8 sdiag_protocol; | |
| 9 | + __u16 pad; | |
| 10 | + __u32 ndiag_ino; | |
| 11 | + __u32 ndiag_show; | |
| 12 | + __u32 ndiag_cookie[2]; | |
| 13 | +}; | |
| 14 | + | |
| 15 | +struct netlink_diag_msg { | |
| 16 | + __u8 ndiag_family; | |
| 17 | + __u8 ndiag_type; | |
| 18 | + __u8 ndiag_protocol; | |
| 19 | + __u8 ndiag_state; | |
| 20 | + | |
| 21 | + __u32 ndiag_portid; | |
| 22 | + __u32 ndiag_dst_portid; | |
| 23 | + __u32 ndiag_dst_group; | |
| 24 | + __u32 ndiag_ino; | |
| 25 | + __u32 ndiag_cookie[2]; | |
| 26 | +}; | |
| 27 | + | |
| 28 | +enum { | |
| 29 | + NETLINK_DIAG_MEMINFO, | |
| 30 | + NETLINK_DIAG_GROUPS, | |
| 31 | + | |
| 32 | + __NETLINK_DIAG_MAX, | |
| 33 | +}; | |
| 34 | + | |
| 35 | +#define NETLINK_DIAG_MAX (__NETLINK_DIAG_MAX - 1) | |
| 36 | + | |
| 37 | +#define NDIAG_PROTO_ALL ((__u8) ~0) | |
| 38 | + | |
| 39 | +#define NDIAG_SHOW_MEMINFO 0x00000001 /* show memory info of a socket */ | |
| 40 | +#define NDIAG_SHOW_GROUPS 0x00000002 /* show groups of a netlink socket */ | |
| 41 | + | |
| 42 | +#endif | |