r10706: split out the irpc server functions in the NBT server, so the mainline

NBT server code remains reabable. Also fixed the copyright header to
include Volker, as he wrote the getdc server function
(This used to be commit a973197d3e0045a76a2f14153f5541b9e36e6c8a)

1 files changed, 192 insertions, 0 deletions

diff --git a/source4/nbt_server/irpc.c b/source4/nbt_server/irpc.c
new file mode 100644
index 0000000000..94284184c1
--- /dev/null
+++ b/source4/nbt_server/irpc.c
@@ -0,0 +1,192 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   irpc services for the NBT server
+
+   Copyright (C) Andrew Tridgell	2005
+   Copyright (C) Volker Lendecke	2005
+   
+   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
+   (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "smbd/service_task.h"
+#include "nbt_server/nbt_server.h"
+
+
+/*
+  serve out the nbt statistics
+*/
+static NTSTATUS nbtd_information(struct irpc_message *msg, 
+				 struct nbtd_information *r)
+{
+	struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
+
+	switch (r->in.level) {
+	case NBTD_INFO_STATISTICS:
+		r->out.info.stats = &server->stats;
+		break;
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  winbind needs to be able to do a getdc request, but some windows
+  servers always send the reply to port 138, regardless of the request
+  port. To cope with this we use a irpc request to the NBT server
+  which has port 138 open, and thus can receive the replies
+*/
+struct getdc_state {
+	struct irpc_message *msg;
+	struct nbtd_getdcname *req;
+};
+
+static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot, 
+				     struct nbt_dgram_packet *packet, 
+				     const char *src_address, int src_port)
+{
+	struct getdc_state *s =
+		talloc_get_type(dgmslot->private, struct getdc_state);
+
+	struct nbt_ntlogon_packet ntlogon;
+	NTSTATUS status;
+
+	status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
+					      &ntlogon);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
+			  nt_errstr(status)));
+		goto done;
+	}
+
+	status = NT_STATUS_NO_LOGON_SERVERS;
+
+	DEBUG(10, ("reply: command=%d\n", ntlogon.command));
+
+	switch (ntlogon.command) {
+	case NTLOGON_SAM_LOGON:
+		DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
+		break;
+	case NTLOGON_SAM_LOGON_REPLY: {
+		const char *p = ntlogon.req.reply.server;
+
+		DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
+			   "domain: %s\n", p, ntlogon.req.reply.user_name,
+			   ntlogon.req.reply.domain));
+
+		if (*p == '\\') p += 1;
+		if (*p == '\\') p += 1;
+
+		s->req->out.dcname = talloc_strdup(s->req, p);
+		if (s->req->out.dcname == NULL) {
+			DEBUG(0, ("talloc failed\n"));
+			status = NT_STATUS_NO_MEMORY;
+			goto done;
+		}
+		status = NT_STATUS_OK;
+		break;
+	}
+	default:
+		DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
+		break;
+	}
+
+ done:
+	irpc_send_reply(s->msg, status);
+}
+
+static NTSTATUS nbtd_getdcname(struct irpc_message *msg, 
+			       struct nbtd_getdcname *req)
+{
+	struct nbtd_server *server =
+		talloc_get_type(msg->private, struct nbtd_server);
+
+	struct getdc_state *s;
+	struct nbt_ntlogon_packet p;
+	struct nbt_ntlogon_sam_logon *r;
+	struct nbt_dgram_socket *sock;
+	struct nbt_name src, dst;
+	struct dgram_mailslot_handler *handler;
+	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
+
+	DEBUG(0, ("nbtd_getdcname called\n"));
+
+	sock = server->interfaces[0].dgmsock;
+
+	s = talloc(msg, struct getdc_state);
+        NT_STATUS_HAVE_NO_MEMORY(s);
+
+	s->msg = msg;
+	s->req = req;
+	
+	handler = dgram_mailslot_temp(sock, NBT_MAILSLOT_GETDC,
+				      getdc_recv_ntlogon_reply, s);
+        NT_STATUS_HAVE_NO_MEMORY(handler);
+	
+	ZERO_STRUCT(p);
+	p.command = NTLOGON_SAM_LOGON;
+	r = &p.req.logon;
+	r->request_count = 0;
+	r->computer_name = req->in.my_computername;
+	r->user_name = req->in.my_accountname;
+	r->mailslot_name = handler->mailslot_name;
+	r->acct_control = req->in.account_control;
+	r->sid = *req->in.domain_sid;
+	r->nt_version = 1;
+	r->lmnt_token = 0xffff;
+	r->lm20_token = 0xffff;
+
+	make_nbt_name_client(&src, req->in.my_computername);
+	make_nbt_name(&dst, req->in.domainname, 0x1c);
+
+	status = dgram_mailslot_ntlogon_send(sock, DGRAM_DIRECT_GROUP,
+					     &dst, req->in.ip_address, 138,
+					     &src, &p);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
+			  nt_errstr(status)));
+		return status;
+	}
+
+	msg->defer_reply = True;
+	return NT_STATUS_OK;
+}
+
+
+/*
+  register the irpc handlers for the nbt server
+*/
+void nbtd_register_irpc(struct nbtd_server *nbtsrv)
+{
+	NTSTATUS status;
+	struct task_server *task = nbtsrv->task;
+
+	status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION, 
+			       nbtd_information, nbtsrv);
+	if (!NT_STATUS_IS_OK(status)) {
+		task_server_terminate(task, "nbtd failed to setup monitoring");
+		return;
+	}
+
+	status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
+			       nbtd_getdcname, nbtsrv);
+	if (!NT_STATUS_IS_OK(status)) {
+		task_server_terminate(task, "nbtd failed to setup getdcname "
+				      "handler");
+		return;
+	}
+}