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drivers: eth_mcux: Implement IPv6 multicast group joining/leaving

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IPv6 mcast addr to MAC mcast conversion was factored out to
subsys/net/ip/l2/ethernet.c for reuse by other drivers.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This commit is contained in:
Paul Sokolovsky 2017-12-04 17:24:08 +02:00 committed by Anas Nashif
parent 151f431efa
commit 2a795a19ff
3 changed files with 33 additions and 1 deletions
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11
drivers/ethernet/eth_mcux.c
View file

@ -22,6 +22,7 @@
#include <kernel.h>
#include <net/net_pkt.h>
#include <net/net_if.h>
#include <net/ethernet.h>
#include "fsl_enet.h"
#include "fsl_phy.h"
@ -571,7 +572,15 @@ static void net_if_mcast_cb(struct net_if *iface,
const struct in6_addr *addr,
bool is_joined)
{
/* TBD */
struct net_eth_addr mac_addr;
net_eth_ipv6_mcast_to_mac_addr(addr, &mac_addr);
if (is_joined) {
ENET_AddMulticastGroup(ENET, mac_addr.addr);
} else {
ENET_LeaveMulticastGroup(ENET, mac_addr.addr);
}
}
#endif /* CONFIG_NET_IPV6 */

9
include/net/ethernet.h
View file

@ -85,6 +85,15 @@ static inline bool net_eth_is_addr_multicast(struct net_eth_addr *addr)
const struct net_eth_addr *net_eth_broadcast_addr(void);
/**
* @brief Convert IPv6 multicast address to Ethernet address.
*
* @param ipv6_addr IPv6 multicast address
* @param mac_addr Output buffer for Ethernet address
*/
void net_eth_ipv6_mcast_to_mac_addr(const struct in6_addr *ipv6_addr,
struct net_eth_addr *mac_addr);
#ifdef __cplusplus
}
#endif

14
subsys/net/ip/l2/ethernet.c
View file

@ -31,6 +31,20 @@ const struct net_eth_addr *net_eth_broadcast_addr(void)
return &broadcast_eth_addr;
}
void net_eth_ipv6_mcast_to_mac_addr(const struct in6_addr *ipv6_addr,
struct net_eth_addr *mac_addr)
{
/* RFC 2464 7. Address Mapping -- Multicast
* "An IPv6 packet with a multicast destination address DST,
* consisting of the sixteen octets DST[1] through DST[16],
* is transmitted to the Ethernet multicast address whose
* first two octets are the value 3333 hexadecimal and whose
* last four octets are the last four octets of DST."
*/
mac_addr->addr[0] = mac_addr->addr[1] = 0x33;
memcpy(mac_addr->addr + 2, &ipv6_addr->s6_addr[12], 4);
}
#if defined(CONFIG_NET_DEBUG_L2_ETHERNET)
#define print_ll_addrs(pkt, type, len) \
do { \