util-ioctl.h File Reference

#include "suricata-common.h"
#include "util-device.h"

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Functions
int	GetIfaceMTU (const char *pcap_dev)
	output the link MTU More...
int	GetIfaceMaxPacketSize (LiveDevice *ld)
	output max packet size for a link More...
int	GetIfaceOffloading (const char *dev, int csum, int other)
	output offloading status of the link More...
int	GetIfaceRSSQueuesNum (const char *pcap_dev)
int	DisableIfaceOffloading (LiveDevice *dev, int csum, int other)
void	RestoreIfaceOffloading (LiveDevice *dev)

Detailed Description

Author

Eric Leblond elebl.nosp@m.ond@.nosp@m.edenw.nosp@m.all..nosp@m.com

Definition in file util-ioctl.h.

Function Documentation

DisableIfaceOffloading()

int DisableIfaceOffloading	(	LiveDevice *	dev,
		int	csum,
		int	other
	)

Definition at line 679 of file util-ioctl.c.

References LiveDevice_::offload_orig.

GetIfaceMaxPacketSize()

int GetIfaceMaxPacketSize

(

LiveDevice *

ld

)

output max packet size for a link

This does a best effort to find the maximum packet size for the link. In case of uncertainty, it will output a majorant to be sure avoid the cost of dynamic allocation.

Parameters

LiveDevice

object

Return values

0	in case of error

Definition at line 120 of file util-ioctl.c.

References LiveDevice_::dev, GetIfaceMTU(), and LiveDevice_::mtu.

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GetIfaceMTU()

int GetIfaceMTU

(

const char *

dev

)

output the link MTU

Parameters

Name

of link

Return values

-1	in case of error, 0 if MTU can not be found

Definition at line 81 of file util-ioctl.c.

References SCLogInfo, SCLogWarning, and strlcpy().

Referenced by GetIfaceMaxPacketSize().

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GetIfaceOffloading()

int GetIfaceOffloading	(	const char *	dev,
		int	csum,
		int	other
	)

output offloading status of the link

Test interface for offloading features. If one of them is activated then suricata mays received packets merge at reception. The result is oversized packets and this may cause some serious problem in some capture mode where the size of the packet is limited (AF_PACKET in V2 more for example).

Parameters

Name	of link
csum	check if checksums are offloaded
other	check if other things are offloaded: TSO, GRO, etc.

Return values

-1	in case of error, 0 if none, 1 if some

Definition at line 666 of file util-ioctl.c.

GetIfaceRSSQueuesNum()

int GetIfaceRSSQueuesNum

(

const char *

pcap_dev

)

Definition at line 709 of file util-ioctl.c.

References SCLogInfo, SCLogWarning, and strlcpy().

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RestoreIfaceOffloading()

void RestoreIfaceOffloading

(

LiveDevice *

dev

)

Definition at line 696 of file util-ioctl.c.

References LiveDevice_::offload_orig.