Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4885a504 authored by Ed Swierk's avatar Ed Swierk Committed by David S. Miller
Browse files

[TAP]: Configurable interface MTU. 



Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0b69d4bd

drivers/net/tun.c

+14 −0
Original line number Diff line number Diff line
@@ -172,6 +172,18 @@ tun_net_mclist(struct net_device *dev) 
	}

}



#define MIN_MTU 68

#define MAX_MTU 65535



static int

tun_net_change_mtu(struct net_device *dev, int new_mtu)

{

	if (new_mtu < MIN_MTU || new_mtu + dev->hard_header_len > MAX_MTU)

		return -EINVAL;

	dev->mtu = new_mtu;

	return 0;

}



/* Initialize net device. */

static void tun_net_init(struct net_device *dev)

{
@@ -183,6 +195,7 @@ static void tun_net_init(struct net_device *dev) 
		dev->hard_header_len = 0;

		dev->addr_len = 0;

		dev->mtu = 1500;

		dev->change_mtu = tun_net_change_mtu;



		/* Zero header length */

		dev->type = ARPHRD_NONE;
@@ -195,6 +208,7 @@ static void tun_net_init(struct net_device *dev) 
		dev->set_multicast_list = tun_net_mclist;



		ether_setup(dev);

		dev->change_mtu = tun_net_change_mtu;



		/* random address already created for us by tun_set_iff, use it */

		memcpy(dev->dev_addr, tun->dev_addr, min(sizeof(tun->dev_addr), sizeof(dev->dev_addr)) );