1 files changed, 275 insertions, 0 deletions
diff --git a/roms/ipxe/src/usr/lotest.c b/roms/ipxe/src/usr/lotest.c
new file mode 100644
index 00000000..ad7a2fad
--- /dev/null
+++ b/roms/ipxe/src/usr/lotest.c
@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2010 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 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <ipxe/iobuf.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/if_ether.h>
+#include <ipxe/keys.h>
+#include <ipxe/console.h>
+#include <usr/ifmgmt.h>
+#include <usr/lotest.h>
+
+/** @file
+ *
+ * Loopback testing
+ *
+ */
+
+/** Current loopback test receiver */
+static struct net_device *lotest_receiver;
+
+/** Loopback testing received packets */
+static LIST_HEAD ( lotest_queue );
+
+/**
+ * Process received packet
+ *
+ * @v iobuf		I/O buffer
+ * @v netdev		Network device
+ * @v ll_dest		Link-layer destination address
+ * @v ll_source		Link-layer source address
+ * @v flags		Packet flags
+ * @ret rc		Return status code
+ */
+static int lotest_rx ( struct io_buffer *iobuf,
+		       struct net_device *netdev,
+		       const void *ll_dest __unused,
+		       const void *ll_source __unused,
+		       unsigned int flags __unused ) {
+
+	/* Add to received packet queue if currently performing a test */
+	if ( netdev == lotest_receiver ) {
+		list_add_tail ( &iobuf->list, &lotest_queue );
+	} else {
+		free_iob ( iobuf );
+	}
+
+	return 0;
+}
+
+/**
+ * Dequeue received packet
+ *
+ * @ret iobuf		I/O buffer, or NULL
+ */
+static struct io_buffer * lotest_dequeue ( void ) {
+	struct io_buffer *iobuf;
+
+	/* Remove first packet (if any) from received packet queue */
+	iobuf = list_first_entry ( &lotest_queue, struct io_buffer, list );
+	if ( ! iobuf )
+		return NULL;
+	list_del ( &iobuf->list );
+
+	return iobuf;
+}
+
+/**
+ * Transcribe network-layer address
+ *
+ * @v net_addr		Network-layer address
+ * @ret string		Human-readable transcription of address
+ */
+static const char * lotest_ntoa ( const void *net_addr __unused ) {
+	return "<INVALID>";
+}
+
+/**
+ * Loopback test network-layer protocol
+ *
+ * Using a dedicated network-layer protocol avoids problems caused by
+ * cards supporting features such as IPv4 checksum offload trying to
+ * interpret the (randomly generated) network-layer content.
+ */
+static struct net_protocol lotest_protocol __net_protocol = {
+	.name = "LOTEST",
+	.rx = lotest_rx,
+	.ntoa = lotest_ntoa,
+	.net_proto = htons ( 0x6950 ), /* Not a genuine protocol number */
+	.net_addr_len = 0,
+};
+
+/**
+ * Discard all received loopback test packets
+ *
+ */
+static void lotest_flush ( void ) {
+	struct io_buffer *iobuf;
+
+	while ( ( iobuf = lotest_dequeue() ) != NULL )
+		free_iob ( iobuf );
+}
+
+/**
+ * Wait for packet to be received
+ *
+ * @v data		Expected data
+ * @v len		Expected data length
+ * @ret rc		Return status code
+ */
+static int loopback_wait ( void *data, size_t len ) {
+	struct io_buffer *iobuf;
+
+	/* Poll until packet arrives */
+	while ( 1 ) {
+
+		/* Check for cancellation */
+		if ( iskey() && ( getchar() == CTRL_C ) )
+			return -ECANCELED;
+
+		/* Poll network devices */
+		net_poll();
+
+		/* Dequeue packet, if available */
+		iobuf = lotest_dequeue();
+		if ( ! iobuf )
+			continue;
+
+		/* Check packet length */
+		if ( iob_len ( iobuf ) != len ) {
+			printf ( "\nLength mismatch: sent %zd, received %zd",
+				 len, iob_len ( iobuf ) );
+			DBG ( "\nSent:\n" );
+			DBG_HDA ( 0, data, len );
+			DBG ( "Received:\n" );
+			DBG_HDA ( 0, iobuf->data, iob_len ( iobuf ) );
+			free_iob ( iob_disown ( iobuf ) );
+			return -EINVAL;
+		}
+
+		/* Check packet content */
+		if ( memcmp ( iobuf->data, data, len ) != 0 ) {
+			printf ( "\nContent mismatch" );
+			DBG ( "\nSent:\n" );
+			DBG_HDA ( 0, data, len );
+			DBG ( "Received:\n" );
+			DBG_HDA ( 0, iobuf->data, iob_len ( iobuf ) );
+			free_iob ( iob_disown ( iobuf ) );
+			return -EINVAL;
+		}
+
+		/* Discard packet and return */
+		free_iob ( iob_disown ( iobuf ) );
+		return 0;
+	}
+}
+
+/**
+ * Perform loopback test between two network devices
+ *
+ * @v sender		Sending network device
+ * @v receiver		Received network device
+ * @v mtu		Packet size (excluding link-layer headers)
+ * @ret rc		Return status code
+ */
+int loopback_test ( struct net_device *sender, struct net_device *receiver,
+		    size_t mtu ) {
+	uint8_t *buf;
+	uint32_t *seq;
+	struct io_buffer *iobuf;
+	unsigned int i;
+	unsigned int successes;
+	int rc;
+
+	/* Open network devices */
+	if ( ( rc = ifopen ( sender ) ) != 0 )
+		return rc;
+	if ( ( rc = ifopen ( receiver ) ) != 0 )
+		return rc;
+
+	/* Wait for link-up */
+	if ( ( rc = iflinkwait ( sender, 0 ) ) != 0 )
+		return rc;
+	if ( ( rc = iflinkwait ( receiver, 0 ) ) != 0 )
+		return rc;
+
+	/* Allocate data buffer */
+	if ( mtu < sizeof ( *seq ) )
+		mtu = sizeof ( *seq );
+	buf = malloc ( mtu );
+	if ( ! buf )
+		return -ENOMEM;
+	seq = ( ( void * ) buf );
+
+	/* Print initial statistics */
+	printf ( "Performing loopback test from %s to %s with %zd byte MTU\n",
+		 sender->name, receiver->name, mtu );
+	ifstat ( sender );
+	ifstat ( receiver );
+
+	/* Start loopback test */
+	lotest_flush();
+	lotest_receiver = receiver;
+
+	/* Perform loopback test */
+	for ( successes = 0 ; ; successes++ ) {
+
+		/* Print running total */
+		printf ( "\r%d", successes );
+
+		/* Generate random packet */
+		*seq = htonl ( successes );
+		for ( i = sizeof ( *seq ) ; i < mtu ; i++ )
+			buf[i] = random();
+		iobuf = alloc_iob ( MAX_LL_HEADER_LEN + mtu );
+		if ( ! iobuf ) {
+			printf ( "\nFailed to allocate I/O buffer" );
+			rc = -ENOMEM;
+			break;
+		}
+		iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
+		memcpy ( iob_put ( iobuf, mtu ), buf, mtu );
+
+		/* Transmit packet */
+		if ( ( rc = net_tx ( iob_disown ( iobuf ), sender,
+				     &lotest_protocol, receiver->ll_addr,
+				     sender->ll_addr ) ) != 0 ) {
+			printf ( "\nFailed to transmit packet: %s",
+				 strerror ( rc ) );
+			break;
+		}
+
+		/* Wait for received packet */
+		if ( ( rc = loopback_wait ( buf, mtu ) ) != 0 )
+			break;
+	}
+
+	printf ( "\n");
+
+	/* Stop loopback testing */
+	lotest_receiver = NULL;
+	lotest_flush();
+
+	/* Dump final statistics */
+	ifstat ( sender );
+	ifstat ( receiver );
+
+	/* Free buffer */
+	free ( buf );
+
+	return 0;
+}