diff options
Diffstat (limited to 'src/net/ethernet.c')
| -rw-r--r-- | src/net/ethernet.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/src/net/ethernet.c b/src/net/ethernet.c index 7b1c496f..ebb551f0 100644 --- a/src/net/ethernet.c +++ b/src/net/ethernet.c @@ -24,6 +24,7 @@ #include <assert.h> #include <gpxe/if_arp.h> #include <gpxe/if_ether.h> +#include <gpxe/in.h> #include <gpxe/netdevice.h> #include <gpxe/iobuf.h> #include <gpxe/ethernet.h> @@ -92,8 +93,8 @@ static int eth_pull ( struct io_buffer *iobuf, /** * Transcribe Ethernet address * - * @v ll_addr Link-layer address - * @ret string Link-layer address in human-readable format + * @v ll_addr Link-layer address + * @ret string Link-layer address in human-readable format */ const char * eth_ntoa ( const void *ll_addr ) { static char buf[18]; /* "00:00:00:00:00:00" */ @@ -105,6 +106,32 @@ const char * eth_ntoa ( const void *ll_addr ) { return buf; } +/** + * Hash multicast address + * + * @v af Address family + * @v net_addr Network-layer address + * @v ll_addr Link-layer address to fill in + * @ret rc Return status code + */ +static int eth_mc_hash ( unsigned int af, const void *net_addr, + void *ll_addr ) { + const uint8_t *net_addr_bytes = net_addr; + uint8_t *ll_addr_bytes = ll_addr; + + switch ( af ) { + case AF_INET: + ll_addr_bytes[0] = 0x01; + ll_addr_bytes[1] = 0x00; + ll_addr_bytes[2] = 0x5e; + ll_addr_bytes[3] = net_addr_bytes[1] & 0x7f; + ll_addr_bytes[4] = net_addr_bytes[2]; + ll_addr_bytes[5] = net_addr_bytes[3]; + default: + return -ENOTSUP; + } +} + /** Ethernet protocol */ struct ll_protocol ethernet_protocol __ll_protocol = { .name = "Ethernet", @@ -115,4 +142,5 @@ struct ll_protocol ethernet_protocol __ll_protocol = { .push = eth_push, .pull = eth_pull, .ntoa = eth_ntoa, + .mc_hash = eth_mc_hash, }; |