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[lotest] Accept non-loopback packets during test

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It can sometimes be awkward to prevent additional packets from being
received during a loopback test.  Allow such additional packets to be
present without terminating the test.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2011-12-07 00:41:48 +00:00
parent f289391134
commit 29651e0c02
1 changed files with 86 additions and 58 deletions
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144
src/usr/lotest.c
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@ -84,6 +84,86 @@ static struct net_protocol lotest_protocol __net_protocol = {
.net_addr_len = 0,
};
/**
* Wait for packet to be received
*
* @v receiver Receiving network device*
* @v data Expected data
* @v len Expected data length
* @ret rc Return status code
*/
static int loopback_wait ( struct net_device *receiver, void *data,
size_t len ) {
struct ll_protocol *ll_protocol = receiver->ll_protocol;
struct io_buffer *iobuf;
const void *ll_dest;
const void *ll_source;
uint16_t net_proto;
unsigned int flags;
int rc;
/* 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 = netdev_rx_dequeue ( receiver );
if ( ! iobuf )
continue;
/* Strip link-layer header */
if ( ( rc = ll_protocol->pull ( receiver, iobuf, &ll_dest,
&ll_source, &net_proto,
&flags ) ) != 0 ) {
printf ( "\nFailed to strip link-layer header: %s",
strerror ( rc ) );
free_iob ( iob_disown ( iobuf ) );
return rc;
}
/* Ignore non-loopback packets */
if ( net_proto != lotest_protocol.net_proto ) {
printf ( "\nReceived spurious packet type %04x\n",
ntohs ( net_proto ) );
free_iob ( iob_disown ( 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
*
@ -96,10 +176,6 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
size_t mtu ) {
uint8_t buf[mtu];
struct io_buffer *iobuf;
const void *ll_dest;
const void *ll_source;
uint16_t net_proto;
unsigned int flags;
unsigned int i;
unsigned int successes;
int rc;
@ -140,7 +216,7 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
if ( ! iobuf ) {
printf ( "\nFailed to allocate I/O buffer" );
rc = -ENOMEM;
goto done;
break;
}
iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
memcpy ( iob_put ( iobuf, sizeof ( buf ) ),
@ -152,65 +228,17 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver,
sender->ll_addr ) ) != 0 ) {
printf ( "\nFailed to transmit packet: %s",
strerror ( rc ) );
goto done;
break;
}
/* Poll until packet arrives */
do {
/* Check for cancellation */
if ( iskey() && ( getchar() == CTRL_C ) ) {
rc = -ECANCELED;
goto done;
}
/* Poll network devices */
net_poll();
} while ( ( iobuf = netdev_rx_dequeue ( receiver ) ) == NULL );
/* Check received packet */
if ( ( rc = receiver->ll_protocol->pull ( receiver, iobuf,
&ll_dest, &ll_source,
&net_proto,
&flags ) ) != 0 ) {
printf ( "\nFailed to strip link-layer header: %s",
strerror ( rc ) );
goto done;
/* Wait for received packet */
if ( ( rc = loopback_wait ( receiver, buf,
sizeof ( buf ) ) ) != 0 ) {
break;
}
if ( net_proto == lotest_protocol.net_proto ) {
if ( iob_len ( iobuf ) != sizeof ( buf ) ) {
printf ( "\nLength mismatch: sent %zd, "
"received %zd",
sizeof ( buf ), iob_len ( iobuf ) );
DBG ( "\nSent:\n" );
DBG_HDA ( 0, buf, sizeof ( buf ) );
DBG ( "Received:\n" );
DBG_HDA ( 0, iobuf->data, iob_len ( iobuf ) );
rc = -EINVAL;
goto done;
}
if ( memcmp ( iobuf->data, buf, sizeof ( buf ) ) != 0){
printf ( "\nContent mismatch" );
DBG ( "\nSent:\n" );
DBG_HDA ( 0, buf, sizeof ( buf ) );
DBG ( "Received:\n" );
DBG_HDA ( 0, iobuf->data, iob_len ( iobuf ) );
rc = -EINVAL;
goto done;
}
} else {
printf ( "\nReceived spurious packet type %04x\n",
ntohs ( net_proto ) );
/* Continue; this allows for the fact that
* there may have been packets outstanding on
* the wire when we started the test.
*/
}
free_iob ( iob_disown ( iobuf ) );
}
done:
printf ( "\n");
free_iob ( iobuf );
netdev_rx_unfreeze ( receiver );
/* Dump final statistics */