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authorDavid Updegraff <dave@cray.com>2007-06-11 10:41:07 -0500
committerBen Warren <bwarren@qstreams.com>2007-08-13 23:22:31 -0400
commit53a5c424bf8655b7b4e2c305a441963259a26a81 (patch)
tree281e5aed270485a3c496479c0d46cea87e00c420 /net/eth.c
parent5d110f0aa69f065ee386ec1840dfee1e8cc46bc1 (diff)
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multicast tftp: RFC2090
Implemented IETF RFC2090, Multicast TFTP. Initial implementation on Realtek RTL8139 and Freescale TSEC. Signed-off-by: David Updegraff <dave@cray.com> Signed-off-by: Ben Warren <bwarren@qstreams.com>
Diffstat (limited to 'net/eth.c')
-rw-r--r--net/eth.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/net/eth.c b/net/eth.c
index c8f92a5..9ccbcca 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)
{