s3:smb2_server: add basic support for SMB 2.1

This adds support for the 2 stage negprot, from SMB 1 to SMB 2.1.

Support for this of for now and "max protocol = SMB2" still maps
to "max protocol = SMB2_02" PROTOCOL_SMB2_02.

In order to activate smb2.1, you need to use "max protocol = SMB2_10".

metze

Autobuild-User: Stefan Metzmacher <metze@samba.org>
Autobuild-Date: Mon Sep  5 19:30:58 CEST 2011 on sn-devel-104

3 files changed, 65 insertions, 4 deletions

diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h
index 2e59d9bc5f..6ce9835dee 100644
--- a/source3/smbd/globals.h
+++ b/source3/smbd/globals.h
@@ -241,6 +241,7 @@ const char *smb2_opcode_name(uint16_t opcode);
 bool smbd_is_smb2_header(const uint8_t *inbuf, size_t size);
 
 void reply_smb2002(struct smb_request *req, uint16_t choice);
+void reply_smb20ff(struct smb_request *req, uint16_t choice);
 void smbd_smb2_first_negprot(struct smbd_server_connection *sconn,
 			     const uint8_t *inbuf, size_t size);
 
@@ -578,6 +579,7 @@ struct smbd_server_connection {
 		struct tevent_queue *recv_queue;
 		struct tevent_queue *send_queue;
 		struct tstream_context *stream;
+		bool negprot_2ff;
 		struct {
 			/* an id tree used to allocate vuids */
 			/* this holds info on session vuids that are already
diff --git a/source3/smbd/negprot.c b/source3/smbd/negprot.c
index 49b9420fbf..a38534f323 100644
--- a/source3/smbd/negprot.c
+++ b/source3/smbd/negprot.c
@@ -536,6 +536,7 @@ static const struct {
 	void (*proto_reply_fn)(struct smb_request *req, uint16 choice);
 	int protocol_level;
 } supported_protocols[] = {
+	{"SMB 2.???",               "SMB2_FF",  reply_smb20ff,  PROTOCOL_SMB2_10},
 	{"SMB 2.002",               "SMB2_02",  reply_smb2002,  PROTOCOL_SMB2_02},
 	{"NT LANMAN 1.0",           "NT1",      reply_nt1,      PROTOCOL_NT1},
 	{"NT LM 0.12",              "NT1",      reply_nt1,      PROTOCOL_NT1},
diff --git a/source3/smbd/smb2_negprot.c b/source3/smbd/smb2_negprot.c
index dfb2da3fda..56a30d0d71 100644
--- a/source3/smbd/smb2_negprot.c
+++ b/source3/smbd/smb2_negprot.c
@@ -25,9 +25,9 @@
 
 /*
  * this is the entry point if SMB2 is selected via
- * the SMB negprot and the "SMB 2.002" dialect.
+ * the SMB negprot and the given dialect.
  */
-void reply_smb2002(struct smb_request *req, uint16_t choice)
+static void reply_smb20xx(struct smb_request *req, uint16_t dialect)
 {
 	uint8_t *smb2_inbuf;
 	uint8_t *smb2_hdr;
@@ -51,7 +51,7 @@ void reply_smb2002(struct smb_request *req, uint16_t choice)
 	SSVAL(smb2_body, 0x00, 0x0024);	/* struct size */
 	SSVAL(smb2_body, 0x02, 0x0001);	/* dialect count */
 
-	SSVAL(smb2_dyn,  0x00, SMB2_DIALECT_REVISION_202);
+	SSVAL(smb2_dyn,  0x00, dialect);
 
 	req->outbuf = NULL;
 
@@ -59,6 +59,25 @@ void reply_smb2002(struct smb_request *req, uint16_t choice)
 	return;
 }
 
+/*
+ * this is the entry point if SMB2 is selected via
+ * the SMB negprot and the "SMB 2.002" dialect.
+ */
+void reply_smb2002(struct smb_request *req, uint16_t choice)
+{
+	reply_smb20xx(req, SMB2_DIALECT_REVISION_202);
+}
+
+/*
+ * this is the entry point if SMB2 is selected via
+ * the SMB negprot and the "SMB 2.???" dialect.
+ */
+void reply_smb20ff(struct smb_request *req, uint16_t choice)
+{
+	req->sconn->smb2.negprot_2ff = true;
+	reply_smb20xx(req, SMB2_DIALECT_REVISION_2FF);
+}
+
 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
 {
 	const uint8_t *inbody;
@@ -108,6 +127,28 @@ NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
 	indyn = (const uint8_t *)req->in.vector[i+2].iov_base;
 
 	for (c=0; protocol == PROTOCOL_NONE && c < dialect_count; c++) {
+		if (lp_maxprotocol() < PROTOCOL_SMB2_10) {
+			break;
+		}
+		if (lp_minprotocol() > PROTOCOL_SMB2_10) {
+			break;
+		}
+
+		dialect = SVAL(indyn, c*2);
+		if (dialect == SMB2_DIALECT_REVISION_210) {
+			protocol = PROTOCOL_SMB2_10;
+			break;
+		}
+	}
+
+	for (c=0; protocol == PROTOCOL_NONE && c < dialect_count; c++) {
+		if (lp_maxprotocol() < PROTOCOL_SMB2_02) {
+			break;
+		}
+		if (lp_minprotocol() > PROTOCOL_SMB2_02) {
+			break;
+		}
+
 		dialect = SVAL(indyn, c*2);
 		if (dialect == SMB2_DIALECT_REVISION_202) {
 			protocol = PROTOCOL_SMB2_02;
@@ -115,11 +156,28 @@ NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
 		}
 	}
 
+	for (c=0; protocol == PROTOCOL_NONE && c < dialect_count; c++) {
+		if (lp_maxprotocol() < PROTOCOL_SMB2_10) {
+			break;
+		}
+
+		dialect = SVAL(indyn, c*2);
+		if (dialect == SMB2_DIALECT_REVISION_2FF) {
+			if (req->sconn->smb2.negprot_2ff) {
+				req->sconn->smb2.negprot_2ff = false;
+				protocol = PROTOCOL_SMB2_10;
+				break;
+			}
+		}
+	}
+
 	if (protocol == PROTOCOL_NONE) {
 		return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
 	}
 
-	set_Protocol(protocol);
+	if (dialect != SMB2_DIALECT_REVISION_2FF) {
+		set_Protocol(protocol);
+	}
 
 	if (get_remote_arch() != RA_SAMBA) {
 		set_remote_arch(RA_VISTA);