diff options
| author | Michael Brown <mcb30@ipxe.org> | 2013-07-14 11:37:17 +0200 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2013-07-14 11:40:11 +0200 |
| commit | c0d2aebdcfcd34192c9ecfdb1933be6a590b147d (patch) | |
| tree | 36e4c9a3d61800cb95c0c294bd7f5608c93a0753 /src/usr/lotest.c | |
| parent | 7016164056fb1065c1379d6ac58d1e9cc475c4db (diff) | |
| download | ipxe-c0d2aebdcfcd34192c9ecfdb1933be6a590b147d.tar.gz | |
[lotest] Include sequence number within loopback test packets
Include a sequence number as the first four bytes of the loopback test
packet payload. When a content mismatch occurs, this gives some
information about the source of the mismatched packet.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/usr/lotest.c')
| -rw-r--r-- | src/usr/lotest.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/src/usr/lotest.c b/src/usr/lotest.c index c4b0b441..905290a5 100644 --- a/src/usr/lotest.c +++ b/src/usr/lotest.c @@ -175,7 +175,8 @@ static int loopback_wait ( struct net_device *receiver, void *data, */ int loopback_test ( struct net_device *sender, struct net_device *receiver, size_t mtu ) { - uint8_t buf[mtu]; + uint8_t *buf; + uint32_t *seq; struct io_buffer *iobuf; unsigned int i; unsigned int successes; @@ -193,6 +194,14 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver, if ( ( rc = iflinkwait ( receiver, LINK_WAIT_MS ) ) != 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 ); @@ -211,17 +220,17 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver, printf ( "\r%d", successes ); /* Generate random packet */ - for ( i = 0 ; i < sizeof ( buf ) ; i++ ) + *seq = htonl ( successes ); + for ( i = sizeof ( *seq ) ; i < mtu ; i++ ) buf[i] = random(); - iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( buf ) ); + 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, sizeof ( buf ) ), - buf, sizeof ( buf ) ); + memcpy ( iob_put ( iobuf, mtu ), buf, mtu ); /* Transmit packet */ if ( ( rc = net_tx ( iob_disown ( iobuf ), sender, @@ -233,10 +242,8 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver, } /* Wait for received packet */ - if ( ( rc = loopback_wait ( receiver, buf, - sizeof ( buf ) ) ) != 0 ) { + if ( ( rc = loopback_wait ( receiver, buf, mtu ) ) != 0 ) break; - } } printf ( "\n"); @@ -246,5 +253,8 @@ int loopback_test ( struct net_device *sender, struct net_device *receiver, ifstat ( sender ); ifstat ( receiver ); + /* Free buffer */ + free ( buf ); + return 0; } |