netlink.c File Reference

Control Area Network - Ethernet - Gateway - Netlink (Utility) More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <netlink/netlink.h>
#include <netlink/cache.h>
#include <netlink/attr.h>
#include <netlink/addr.h>
#include <netlink/msg.h>
#include <netlink/errno.h>
#include <netlink/genl/ctrl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/mngt.h>
#include "netlink.h"

Include dependency graph for netlink.c:

Go to the source code of this file.

Data Structures
struct	flags
	Flags defined in netlink.h. Can used by flags2str(). More...
struct	enums
	Array of type "enum gw_type" in netlink.h. Can use by enum2str(). More...

Macros
#define	GE_FAMILY_NAME   "CE_GW"
#define	GE_FAMILY_VERSION   1
#define	USER_HDR_SIZE   0
#define	NO_FLAG   0
#define	IFACE_VERSION   0
#define	CE_GW_A_MAX   (__CE_GW_A_MAX - 1)

Enumerations
enum	{   CE_GW_A_UNSPEC, CE_GW_A_DATA, CE_GW_A_SRC, CE_GW_A_DST,   CE_GW_A_ID, CE_GW_A_FLAGS, CE_GW_A_TYPE, CE_GW_A_HNDL,   CE_GW_A_DROP, __CE_GW_A_MAX }

Functions
char *	flags2str (uint32_t bits, const struct flags *flags, size_t size)
	Convert Flags in ist textual represenation. More...
char *	enum2str (int value, const struct enums *enums, size_t size, int max)
	Returns the textual representation of an numeric identifier (enum) More...
int	nl_cb_general_errno (struct sockaddr_nl *nla, struct nlmsgerr *nlerr, void *arg)
	A callback wich prints the errno to stderr. More...
int	nl_cb_list_entry (struct nl_msg *msg, void *arg)
	will be called for every multipart message and prints informations to stdout. More...
int	nl_cb_list_finish (struct nl_msg *msg, void *arg)
	will be called at the end of a multipart message. More...
int	nl_cb_echo_answer (struct nl_msg *msg, void *arg)
	Callback witch receive the message sen bach by kernel. More...
int	ce_gw_add (char *dst_name, char *src_name, uint8_t type, uint32_t flags)
	add a virtual ethernet device or a route More...
int	ce_gw_del (uint32_t id, char *dev_name)
	Deletes a device or a route in Kernel Module. More...
int	ce_gw_list (uint32_t id)
	Print informations of actual active routes to stdout. More...
int	ce_gw_echo (char *message)
	send a message and return the received message from Kernel. (for testing) More...
int	nl_sk_fam_init (void)
	creakte socket and family and connect More...
void	nl_sk_fam_exit (void)
	freeing the alloccated memory. The Function free the memory allocated by nl_sk_fam_init(). More...

Variables
static struct nla_policy	ce_gw_genl_policy [CE_GW_A_MAX+1]
	Netlink Policy - Defines the Type for the Netlink Attributes. More...
struct genl_family *	genl_fam
struct nl_sock *	nl_sk
struct flags	flags_array []
struct enums	type_array []

Detailed Description

Control Area Network - Ethernet - Gateway - Netlink (Utility)

Author

Fabian Raab (fabia.nosp@m.n.ra.nosp@m.ab@tu.nosp@m.m.de)

Date

May, 2013

Copyright

GNU Public License v3 or higher

Definition in file netlink.c.

Macro Definition Documentation

#define CE_GW_A_MAX   (__CE_GW_A_MAX - 1)

Maximum Number of Attribute

Definition at line 73 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), ce_gw_list(), nl_cb_list_entry(), and nl_sk_fam_init().

#define GE_FAMILY_NAME   "CE_GW"

Netlink Family Settings

Definition at line 50 of file netlink.c.

Referenced by nl_sk_fam_init().

#define GE_FAMILY_VERSION   1

Definition at line 51 of file netlink.c.

Referenced by nl_sk_fam_init().

#define IFACE_VERSION   0

Definition at line 54 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), and ce_gw_list().

#define NO_FLAG   0

Definition at line 53 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), and ce_gw_list().

#define USER_HDR_SIZE   0

user header size

Definition at line 52 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), ce_gw_list(), nl_cb_list_entry(), and nl_sk_fam_init().

Enumeration Type Documentation

anonymous enum

Enumerator
CE_GW_A_UNSPEC	Only a Dummy to skip index 0.
CE_GW_A_DATA	NLA_STRING
CE_GW_A_SRC	NLA_STRING
CE_GW_A_DST	NLA_STRING
CE_GW_A_ID	NLA_U32
CE_GW_A_FLAGS	NLA_U32
CE_GW_A_TYPE	NLA_U8
CE_GW_A_HNDL	NLA_U32 Handled Frames
CE_GW_A_DROP	NLA_U32 Dropped Frames
__CE_GW_A_MAX	Maximum Number of Attribute plus 1

Definition at line 61 of file netlink.c.

     {
    CE_GW_A_UNSPEC, 
    CE_GW_A_DATA,   
    CE_GW_A_SRC,    
    CE_GW_A_DST,    
    CE_GW_A_ID, 
    CE_GW_A_FLAGS,  
    CE_GW_A_TYPE,   
    CE_GW_A_HNDL,   
    CE_GW_A_DROP,   
    __CE_GW_A_MAX,  
};

Variable Documentation

struct nla_policy ce_gw_genl_policy[CE_GW_A_MAX+1]

static

Initial value:

= {
    [CE_GW_A_DATA] =    { .type = NLA_STRING },
    [CE_GW_A_SRC] =     { .type = NLA_STRING },
    [CE_GW_A_DST] =     { .type = NLA_STRING },
    [CE_GW_A_ID] =      { .type = NLA_U32 },
    [CE_GW_A_FLAGS] =   { .type = NLA_U32 },
    [CE_GW_A_TYPE] =    { .type = NLA_U8 },
    [CE_GW_A_HNDL] =    { .type = NLA_U32 },
    [CE_GW_A_DROP] =    { .type = NLA_U32 },
}

Netlink Policy - Defines the Type for the Netlink Attributes.

Definition at line 78 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), ce_gw_list(), and nl_cb_list_entry().

struct flags flags_array[]

Initial value:

= {
    { "CAN-FD"  },  
    { 0     }   
}

Referenced by nl_cb_list_entry().

struct genl_family* genl_fam

Generic Netlink Family

Definition at line 89 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), ce_gw_list(), nl_sk_fam_exit(), and nl_sk_fam_init().

struct nl_sock* nl_sk

Socket to Kernel Application

Definition at line 90 of file netlink.c.

Referenced by ce_gw_add(), ce_gw_del(), ce_gw_echo(), ce_gw_list(), nl_sk_fam_exit(), and nl_sk_fam_init().

struct enums type_array[]

Initial value:

= {
    { "NONE"    }, 
    { "ETH"     }, 
    { "NET"     }, 
    { "TCP"     }, 
    { "UDP"     }, 
    { 0     }  
}

Referenced by nl_cb_list_entry().