diff options
Diffstat (limited to 'net/eth.c')
| -rw-r--r-- | net/eth.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/net/eth.c b/net/eth.c index c8f92a52634..9ccbccac0fb 100644 --- a/net/eth.c +++ b/net/eth.c @@ -353,6 +353,51 @@ void eth_set_enetaddr(int num, char *addr) { memcpy(dev->enetaddr, enetaddr, 6); } +#ifdef CONFIG_MCAST_TFTP +/* Multicast. + * mcast_addr: multicast ipaddr from which multicast Mac is made + * join: 1=join, 0=leave. + */ +int eth_mcast_join( IPaddr_t mcast_ip, u8 join) +{ + u8 mcast_mac[6]; + if (!eth_current || !eth_current->mcast) + return -1; + mcast_mac[5] = htonl(mcast_ip) & 0xff; + mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff; + mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f; + mcast_mac[2] = 0x5e; + mcast_mac[1] = 0x0; + mcast_mac[0] = 0x1; + return eth_current->mcast(eth_current, mcast_mac, join); +} + +/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c + * and this is the ethernet-crc method needed for TSEC -- and perhaps + * some other adapter -- hash tables + */ +#define CRCPOLY_LE 0xedb88320 +u32 ether_crc (size_t len, unsigned char const *p) +{ + int i; + u32 crc; + crc = ~0; + while (len--) { + crc ^= *p++; + for (i = 0; i < 8; i++) + crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); + } + /* an reverse the bits, cuz of way they arrive -- last-first */ + crc = (crc >> 16) | (crc << 16); + crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00); + crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0); + crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc); + crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa); + return crc; +} + +#endif + int eth_init(bd_t *bis) { |