/**
* Parse a READLINK reply
*
* @v readlink_reply A structure where the data will be saved
* @v reply The ONC RPC reply to get data from
* @ret rc Return status code
*/
int nfs_get_readlink_reply ( struct nfs_readlink_reply *readlink_reply,
struct oncrpc_reply *reply ) {
if ( ! readlink_reply || ! reply )
return -EINVAL;
readlink_reply->status = oncrpc_iob_get_int ( reply->data );
switch ( readlink_reply->status )
{
case NFS3_OK:
break;
case NFS3ERR_IO:
return -EIO;
case NFS3ERR_ACCES:
return -EACCES;
case NFS3ERR_INVAL:
return -EINVAL;
case NFS3ERR_NOTSUPP:
return -ENOTSUP;
case NFS3ERR_STALE:
return -ESTALE;
case NFS3ERR_BADHANDLE:
case NFS3ERR_SERVERFAULT:
default:
return -EPROTO;
}
if ( oncrpc_iob_get_int ( reply->data ) == 1 )
iob_pull ( reply->data, 5 * sizeof ( uint32_t ) +
8 * sizeof ( uint64_t ) );
readlink_reply->path_len = oncrpc_iob_get_int ( reply->data );
readlink_reply->path = reply->data->data;
return 0;
}
/**
* Parse a READ reply
*
* @v read_reply A structure where the data will be saved
* @v reply The ONC RPC reply to get data from
* @ret rc Return status code
*/
int nfs_get_read_reply ( struct nfs_read_reply *read_reply,
struct oncrpc_reply *reply ) {
if ( ! read_reply || ! reply )
return -EINVAL;
read_reply->status = oncrpc_iob_get_int ( reply->data );
switch ( read_reply->status )
{
case NFS3_OK:
break;
case NFS3ERR_PERM:
return -EPERM;
case NFS3ERR_NOENT:
return -ENOENT;
case NFS3ERR_IO:
return -EIO;
case NFS3ERR_NXIO:
return -ENXIO;
case NFS3ERR_ACCES:
return -EACCES;
case NFS3ERR_INVAL:
return -EINVAL;
case NFS3ERR_STALE:
return -ESTALE;
case NFS3ERR_BADHANDLE:
case NFS3ERR_SERVERFAULT:
default:
return -EPROTO;
}
if ( oncrpc_iob_get_int ( reply->data ) == 1 )
{
iob_pull ( reply->data, 5 * sizeof ( uint32_t ) );
read_reply->filesize = oncrpc_iob_get_int64 ( reply->data );
iob_pull ( reply->data, 7 * sizeof ( uint64_t ) );
}
read_reply->count = oncrpc_iob_get_int ( reply->data );
read_reply->eof = oncrpc_iob_get_int ( reply->data );
read_reply->data_len = oncrpc_iob_get_int ( reply->data );
read_reply->data = reply->data->data;
if ( read_reply->count != read_reply->data_len )
return -EPROTO;
return 0;
}
/**
* Complete bulk IN transfer
*
* @v ep USB endpoint
* @v iobuf I/O buffer
* @v rc Completion status code
*/
static void smsc95xx_in_complete ( struct usb_endpoint *ep,
struct io_buffer *iobuf, int rc ) {
struct smsc95xx_device *smsc95xx =
container_of ( ep, struct smsc95xx_device, usbnet.in );
struct net_device *netdev = smsc95xx->netdev;
struct smsc95xx_rx_header *header;
/* Profile completions */
profile_start ( &smsc95xx_in_profiler );
/* Ignore packets cancelled when the endpoint closes */
if ( ! ep->open ) {
free_iob ( iobuf );
return;
}
/* Record USB errors against the network device */
if ( rc != 0 ) {
DBGC ( smsc95xx, "SMSC95XX %p bulk IN failed: %s\n",
smsc95xx, strerror ( rc ) );
goto err;
}
/* Sanity check */
if ( iob_len ( iobuf ) < ( sizeof ( *header ) + 4 /* CRC */ ) ) {
DBGC ( smsc95xx, "SMSC95XX %p underlength bulk IN\n",
smsc95xx );
DBGC_HDA ( smsc95xx, 0, iobuf->data, iob_len ( iobuf ) );
rc = -EINVAL;
goto err;
}
/* Strip header and CRC */
header = iobuf->data;
iob_pull ( iobuf, sizeof ( *header ) );
iob_unput ( iobuf, 4 /* CRC */ );
/* Check for errors */
if ( header->command & cpu_to_le32 ( SMSC95XX_RX_RUNT |
SMSC95XX_RX_LATE |
SMSC95XX_RX_CRC ) ) {
DBGC ( smsc95xx, "SMSC95XX %p receive error (%08x):\n",
smsc95xx, le32_to_cpu ( header->command ) );
DBGC_HDA ( smsc95xx, 0, iobuf->data, iob_len ( iobuf ) );
rc = -EIO;
goto err;
}
/* Hand off to network stack */
netdev_rx ( netdev, iob_disown ( iobuf ) );
profile_stop ( &smsc95xx_in_profiler );
return;
err:
/* Hand off to network stack */
netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
}
/**
* Extract a file handle from the beginning of an I/O buffer
*
* @v io_buf I/O buffer
* @v fh File handle
* @ret size Size of the data read
*/
size_t nfs_iob_get_fh ( struct io_buffer *io_buf, struct nfs_fh *fh ) {
fh->size = oncrpc_iob_get_int ( io_buf );
if ( fh->size > 64 )
return sizeof ( uint32_t );
memcpy (fh->fh, io_buf->data, fh->size );
iob_pull ( io_buf, fh->size );
return fh->size + sizeof ( uint32_t );
}
static int legacy_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) {
struct nic *nic = netdev->priv;
struct ethhdr *ethhdr;
DBG ( "Transmitting %zd bytes\n", iob_len ( iobuf ) );
iob_pad ( iobuf, ETH_ZLEN );
ethhdr = iobuf->data;
iob_pull ( iobuf, sizeof ( *ethhdr ) );
nic->nic_op->transmit ( nic, ( const char * ) ethhdr->h_dest,
ntohs ( ethhdr->h_protocol ),
iob_len ( iobuf ), iobuf->data );
netdev_tx_complete ( netdev, iobuf );
return 0;
}
/**
* Complete bulk IN transfer
*
* @v ep USB endpoint
* @v iobuf I/O buffer
* @v rc Completion status code
*/
static void dm96xx_in_complete ( struct usb_endpoint *ep,
struct io_buffer *iobuf, int rc ) {
struct dm96xx_device *dm96xx = container_of ( ep, struct dm96xx_device,
usbnet.in );
struct net_device *netdev = dm96xx->netdev;
struct dm96xx_rx_header *header;
/* Ignore packets cancelled when the endpoint closes */
if ( ! ep->open ) {
free_iob ( iobuf );
return;
}
/* Record USB errors against the network device */
if ( rc != 0 ) {
DBGC ( dm96xx, "DM96XX %p bulk IN failed: %s\n",
dm96xx, strerror ( rc ) );
goto err;
}
/* Sanity check */
if ( iob_len ( iobuf ) < ( sizeof ( *header ) + 4 /* CRC */ ) ) {
DBGC ( dm96xx, "DM96XX %p underlength bulk IN\n", dm96xx );
DBGC_HDA ( dm96xx, 0, iobuf->data, iob_len ( iobuf ) );
rc = -EINVAL;
goto err;
}
/* Strip header and CRC */
header = iobuf->data;
iob_pull ( iobuf, sizeof ( *header ) );
iob_unput ( iobuf, 4 /* CRC */ );
/* Check status */
if ( header->rsr & ~DM96XX_RSR_MF ) {
DBGC ( dm96xx, "DM96XX %p receive error %02x:\n",
dm96xx, header->rsr );
DBGC_HDA ( dm96xx, 0, iobuf->data, iob_len ( iobuf ) );
rc = -EIO;
goto err;
}
/* Hand off to network stack */
netdev_rx ( netdev, iob_disown ( iobuf ) );
return;
err:
/* Hand off to network stack */
netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
}
static size_t gdbudp_recv ( char *buf, size_t len ) {
struct io_buffer *iob;
struct ethhdr *ethhdr;
struct arphdr *arphdr;
struct iphdr *iphdr;
struct udp_header *udphdr;
size_t payload_len;
gdbudp_ensure_netdev_open ( netdev );
for ( ; ; ) {
netdev_poll ( netdev );
while ( ( iob = netdev_rx_dequeue ( netdev ) ) != NULL ) {
/* Ethernet header */
if ( iob_len ( iob ) < sizeof ( *ethhdr ) ) {
goto bad_packet;
}
ethhdr = iob->data;
iob_pull ( iob, sizeof ( *ethhdr ) );
/* Handle ARP requests so the client can find our MAC */
if ( ethhdr->h_protocol == htons ( ETH_P_ARP ) ) {
arphdr = iob->data;
if ( iob_len ( iob ) < sizeof ( *arphdr ) + 2 * ( ETH_ALEN + sizeof ( struct in_addr ) ) ||
arphdr->ar_hrd != htons ( ARPHRD_ETHER ) ||
arphdr->ar_pro != htons ( ETH_P_IP ) ||
arphdr->ar_hln != ETH_ALEN ||
arphdr->ar_pln != sizeof ( struct in_addr ) ||
arphdr->ar_op != htons ( ARPOP_REQUEST ) ||
* ( uint32_t * ) arp_target_pa ( arphdr ) != source_addr.sin_addr.s_addr ) {
goto bad_packet;
}
/* Generate an ARP reply */
arphdr->ar_op = htons ( ARPOP_REPLY );
memswap ( arp_sender_pa ( arphdr ), arp_target_pa ( arphdr ), sizeof ( struct in_addr ) );
memcpy ( arp_target_ha ( arphdr ), arp_sender_ha ( arphdr ), ETH_ALEN );
memcpy ( arp_sender_ha ( arphdr ), netdev->ll_addr, ETH_ALEN );
/* Fix up ethernet header */
ethhdr = iob_push ( iob, sizeof ( *ethhdr ) );
memcpy ( ethhdr->h_dest, ethhdr->h_source, ETH_ALEN );
memcpy ( ethhdr->h_source, netdev->ll_addr, ETH_ALEN );
netdev_tx ( netdev, iob );
continue; /* no need to free iob */
}
if ( ethhdr->h_protocol != htons ( ETH_P_IP ) ) {
goto bad_packet;
}
/* IP header */
if ( iob_len ( iob ) < sizeof ( *iphdr ) ) {
goto bad_packet;
}
iphdr = iob->data;
iob_pull ( iob, sizeof ( *iphdr ) );
if ( iphdr->protocol != IP_UDP || iphdr->dest.s_addr != source_addr.sin_addr.s_addr ) {
goto bad_packet;
}
/* UDP header */
if ( iob_len ( iob ) < sizeof ( *udphdr ) ) {
goto bad_packet;
}
udphdr = iob->data;
if ( udphdr->dest != source_addr.sin_port ) {
goto bad_packet;
}
/* Learn the remote connection details */
memcpy ( dest_eth, ethhdr->h_source, ETH_ALEN );
dest_addr.sin_addr.s_addr = iphdr->src.s_addr;
dest_addr.sin_port = udphdr->src;
/* Payload */
payload_len = ntohs ( udphdr->len );
if ( payload_len < sizeof ( *udphdr ) || payload_len > iob_len ( iob ) ) {
goto bad_packet;
}
payload_len -= sizeof ( *udphdr );
iob_pull ( iob, sizeof ( *udphdr ) );
if ( payload_len > len ) {
goto bad_packet;
}
memcpy ( buf, iob->data, payload_len );
free_iob ( iob );
return payload_len;
bad_packet:
free_iob ( iob );
}
cpu_nap();
}
}
