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Add definitions to support a local loopback link layer

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This commit is contained in:
Gregory Nutt 2015-08-24 08:25:08 -06:00
parent 47bab42498
commit ea2fafb024
5 changed files with 37 additions and 8 deletions
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14
net/netdev/netdev_register.c
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@ -61,8 +61,9 @@
* Pre-processor Definitions
****************************************************************************/
#define NETDEV_SLIP_FORMAT "sl%d"
#define NETDEV_ETH_FORMAT "eth%d"
#define NETDEV_LO_FORMAT "lo"
#define NETDEV_SLIP_FORMAT "sl%d"
#define NETDEV_TUN_FORMAT "tun%d"
#if defined(CONFIG_NET_SLIP)
@ -190,6 +191,17 @@ int netdev_register(FAR struct net_driver_s *dev, enum net_lltype_e lltype)
switch (lltype)
{
#ifdef CONFIG_NETDEV_LOOPBACK
case NET_LL_LOOPBACK: /* Local loopback */
dev->d_llhdrlen = 0;
dev->d_mtu = NET_LO_MTU;
#ifdef CONFIG_NET_TCP
dev->d_recvwndo = NET_LO_TCP_RECVWNDO;
#endif
devfmt = NETDEV_LO_FORMAT;
break;
#endif
#ifdef CONFIG_NET_ETHERNET
case NET_LL_ETHERNET: /* Ethernet */
dev->d_llhdrlen = ETH_HDRLEN;