sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-25 17:12:40 +03:00
Code Issues Packages Projects Releases Wiki Activity

Network layer now works as a proof of concept

Browse Source
This commit is contained in:
Michael Brown
2006-04-28 14:13:50 +00:00
parent 1488cd3b73
commit 129c6c3968
6 changed files with 291 additions and 111 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
src/net/ethernet.c
View File

@@ -51,16 +51,21 @@ static uint8_t eth_broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
* is sent for the requested network-layer address and -ENOENT is
* returned.
*/
static int eth_route ( const struct net_header *nethdr,
static int eth_route ( struct net_device *netdev,
const struct net_header *nethdr,
struct ll_header *llhdr ) {
int rc;
/* Fill in the easy bits */
llhdr->net_proto = nethdr->net_protocol->net_proto;
memcpy ( llhdr->source_ll_addr, netdev->ll_addr, ETH_ALEN );
/* Work out the destination MAC address */
if ( nethdr->dest_flags & NETADDR_FL_RAW ) {
memcpy ( llhdr->dest_ll_addr, nethdr->dest_net_addr, ETH_ALEN);
} else if ( nethdr->dest_flags & NETADDR_FL_BROADCAST ) {
if ( nethdr->flags & PKT_FL_BROADCAST ) {
memcpy ( llhdr->dest_ll_addr, eth_broadcast, ETH_ALEN );
} else if ( nethdr->dest_flags & NETADDR_FL_MULTICAST ) {
} else if ( nethdr->flags & PKT_FL_RAW_ADDR ) {
memcpy ( llhdr->dest_ll_addr, nethdr->dest_net_addr, ETH_ALEN);
} else if ( nethdr->flags & PKT_FL_MULTICAST ) {
/* IP multicast is a special case; there exists a
* direct mapping from IP address to MAC address
*/
@@ -73,7 +78,7 @@ static int eth_route ( const struct net_header *nethdr,
llhdr->dest_ll_addr[5] = nethdr->dest_net_addr[3];
} else {
/* Otherwise, look up the address using ARP */
if ( ( rc = arp_resolve ( nethdr, llhdr ) ) != 0 )
if ( ( rc = arp_resolve ( netdev, nethdr, llhdr ) ) != 0 )
return rc;
}
@@ -116,22 +121,40 @@ static void eth_parse_llh ( const struct pk_buff *pkb,
llhdr->net_proto = ethhdr->h_protocol;
if ( memcmp ( ethhdr->h_dest, eth_broadcast, ETH_ALEN ) == 0 ) {
llhdr->dest_flags = NETADDR_FL_BROADCAST;
llhdr->flags = PKT_FL_BROADCAST;
} else if ( ethhdr->h_dest[0] & 0x01 ) {
llhdr->dest_flags = NETADDR_FL_MULTICAST;
llhdr->flags = PKT_FL_MULTICAST;
} else {
llhdr->dest_flags = 0;
llhdr->flags = 0;
}
}
/**
* Transcribe Ethernet address
*
* @v ll_addr Link-layer address
* @ret string Link-layer address in human-readable format
*/
static const char * eth_ntoa ( const void *ll_addr ) {
static char buf[18]; /* "00:00:00:00:00:00" */
uint8_t *eth_addr = ll_addr;
sprintf ( buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
eth_addr[0], eth_addr[1], eth_addr[2],
eth_addr[3], eth_addr[4], eth_addr[5] );
return buf;
}
/** Ethernet protocol */
struct ll_protocol ethernet_protocol = {
.name = "Ethernet",
.ll_proto = htons ( ARPHRD_ETHER ),
.ll_addr_len = ETH_ALEN,
.ll_header_len = ETH_HLEN,
.route = eth_route,
.fill_llh = eth_fill_llh,
.parse_llh = eth_parse_llh,
.ntoa = eth_ntoa,
};
LL_PROTOCOL ( ethernet_protocol );