RxRPC: Handle VERSION Rx protocol packets
Handle VERSION Rx protocol packets. We should respond to a VERSION packet
with a string indicating the Rx version. This is a maximum of 64 characters
and is padded out to 65 chars with NUL bytes.
Note that other AFS clients use the version request as a NAT keepalive so we
need to handle it rather than returning an abort.
The standard formulation seems to be:
<project> <version> built <yyyy>-<mm>-<dd>
for example:
" OpenAFS 1.6.2 built 2013-05-07 "
(note the three extra spaces) as obtained with:
rxdebug grand.mit.edu -version
from the openafs package.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/ar-input.c b/net/rxrpc/ar-input.c
index 481f89f..4505a69 100644
--- a/net/rxrpc/ar-input.c
+++ b/net/rxrpc/ar-input.c
@@ -28,7 +28,7 @@
const char *rxrpc_pkts[] = {
"?00",
"DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG",
- "?09", "?10", "?11", "?12", "?13", "?14", "?15"
+ "?09", "?10", "?11", "?12", "VERSION", "?14", "?15"
};
/*
@@ -593,6 +593,20 @@
rxrpc_queue_conn(conn);
}
+/*
+ * post endpoint-level events to the local endpoint
+ * - this includes debug and version messages
+ */
+static void rxrpc_post_packet_to_local(struct rxrpc_local *local,
+ struct sk_buff *skb)
+{
+ _enter("%p,%p", local, skb);
+
+ atomic_inc(&local->usage);
+ skb_queue_tail(&local->event_queue, skb);
+ rxrpc_queue_work(&local->event_processor);
+}
+
static struct rxrpc_connection *rxrpc_conn_from_local(struct rxrpc_local *local,
struct sk_buff *skb,
struct rxrpc_skb_priv *sp)
@@ -699,6 +713,11 @@
goto bad_message;
}
+ if (sp->hdr.type == RXRPC_PACKET_TYPE_VERSION) {
+ rxrpc_post_packet_to_local(local, skb);
+ goto out;
+ }
+
if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA &&
(sp->hdr.callNumber == 0 || sp->hdr.seq == 0))
goto bad_message;
@@ -731,6 +750,8 @@
else
goto cant_route_call;
}
+
+out:
rxrpc_put_local(local);
return;