diff options
Diffstat (limited to 'qemu/roms/ipxe/src/net/stp.c')
| -rw-r--r-- | qemu/roms/ipxe/src/net/stp.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/qemu/roms/ipxe/src/net/stp.c b/qemu/roms/ipxe/src/net/stp.c deleted file mode 100644 index d4e65a1a2..000000000 --- a/qemu/roms/ipxe/src/net/stp.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <errno.h> -#include <byteswap.h> -#include <ipxe/netdevice.h> -#include <ipxe/ethernet.h> -#include <ipxe/iobuf.h> -#include <ipxe/timer.h> -#include <ipxe/stp.h> - -/** @file - * - * Spanning Tree Protocol (STP) - * - */ - -/* Disambiguate the various error causes */ -#define ENOTSUP_PROTOCOL __einfo_error ( EINFO_ENOTSUP_PROTOCOL ) -#define EINFO_ENOTSUP_PROTOCOL \ - __einfo_uniqify ( EINFO_ENOTSUP, 0x01, \ - "Non-STP packet received" ) -#define ENOTSUP_VERSION __einfo_error ( EINFO_ENOTSUP_VERSION ) -#define EINFO_ENOTSUP_VERSION \ - __einfo_uniqify ( EINFO_ENOTSUP, 0x01, \ - "Legacy STP packet received" ) -#define ENOTSUP_TYPE __einfo_error ( EINFO_ENOTSUP_TYPE ) -#define EINFO_ENOTSUP_TYPE \ - __einfo_uniqify ( EINFO_ENOTSUP, 0x01, \ - "Non-RSTP packet received" ) - -/** - * Process incoming STP packets - * - * @v iobuf I/O buffer - * @v netdev Network device - * @v ll_source Link-layer source address - * @v flags Packet flags - * @ret rc Return status code - */ -static int stp_rx ( struct io_buffer *iobuf, struct net_device *netdev, - const void *ll_dest __unused, - const void *ll_source __unused, - unsigned int flags __unused ) { - struct stp_bpdu *stp; - unsigned int hello; - int rc; - - /* Sanity check */ - if ( iob_len ( iobuf ) < sizeof ( *stp ) ) { - DBGC ( netdev, "STP %s received underlength packet (%zd " - "bytes):\n", netdev->name, iob_len ( iobuf ) ); - DBGC_HDA ( netdev, 0, iobuf->data, iob_len ( iobuf ) ); - rc = -EINVAL; - goto done; - } - stp = iobuf->data; - - /* Ignore non-RSTP packets */ - if ( stp->protocol != htons ( STP_PROTOCOL ) ) { - DBGC ( netdev, "STP %s ignoring non-STP packet (protocol " - "%#04x)\n", netdev->name, ntohs ( stp->protocol ) ); - rc = -ENOTSUP_PROTOCOL; - goto done; - } - if ( stp->version < STP_VERSION_RSTP ) { - DBGC ( netdev, "STP %s received legacy STP packet (version " - "%#02x)\n", netdev->name, stp->version ); - rc = -ENOTSUP_VERSION; - goto done; - } - if ( stp->type != STP_TYPE_RSTP ) { - DBGC ( netdev, "STP %s received non-RSTP packet (type %#02x)\n", - netdev->name, stp->type ); - rc = -ENOTSUP_TYPE; - goto done; - } - - /* Dump information */ - DBGC2 ( netdev, "STP %s %s port %#04x flags %#02x hello %d delay %d\n", - netdev->name, eth_ntoa ( stp->sender.mac ), ntohs ( stp->port ), - stp->flags, ntohs ( stp->hello ), ntohs ( stp->delay ) ); - - /* Check if port is forwarding */ - if ( ! ( stp->flags & STP_FL_FORWARDING ) ) { - /* Port is not forwarding: block link for two hello times */ - DBGC ( netdev, "STP %s %s port %#04x flags %#02x is not " - "forwarding\n", - netdev->name, eth_ntoa ( stp->sender.mac ), - ntohs ( stp->port ), stp->flags ); - hello = ( ( ntohs ( stp->hello ) * TICKS_PER_SEC ) / 256 ); - netdev_link_block ( netdev, ( hello * 2 ) ); - rc = -ENETUNREACH; - goto done; - } - - /* Success */ - if ( netdev_link_blocked ( netdev ) ) { - DBGC ( netdev, "STP %s %s port %#04x flags %#02x is " - "forwarding\n", - netdev->name, eth_ntoa ( stp->sender.mac ), - ntohs ( stp->port ), stp->flags ); - } - netdev_link_unblock ( netdev ); - rc = 0; - - done: - free_iob ( iobuf ); - return rc; -} - -/** - * Transcribe STP address - * - * @v net_addr STP address - * @ret string "<STP>" - * - * This operation is meaningless for the STP protocol. - */ -static const char * stp_ntoa ( const void *net_addr __unused ) { - return "<STP>"; -} - -/** STP network protocol */ -struct net_protocol stp_protocol __net_protocol = { - .name = "STP", - .net_proto = htons ( ETH_P_STP ), - .rx = stp_rx, - .ntoa = stp_ntoa, -}; |