r3163: Add server side support for ncalrpc: and ncacn_unix_stream:

Examples of binding strings are :

ncalrpc:[EPMAPPER]
ncacn_unix_stream:[/tmp/epmapper]

N.B. The unix socket support in lib/socket/ appears to close and remove the
socket it is listening on after the first client disconnects so until
that has been fixed, it is only possible to do one ncalrpc: or ncacn_unix_stream: request per instance of smbd :-)

Support for looking up NCALRPC names via the endpoint mapper will be added later.
(This used to be commit 426f3e63cae3d306dcdc13ee4b655eed30057ff8)

1 files changed, 328 insertions, 0 deletions

diff --git a/source4/rpc_server/dcerpc_sock.c b/source4/rpc_server/dcerpc_sock.c
new file mode 100644
index 0000000000..d5646a7c7a
--- /dev/null
+++ b/source4/rpc_server/dcerpc_sock.c
@@ -0,0 +1,328 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   server side dcerpc using various kinds of sockets (tcp, unix domain)
+
+   Copyright (C) Andrew Tridgell 2003
+   Copyright (C) Stefan (metze) Metzmacher 2004   
+   Copyright (C) Jelmer Vernooij 2004
+
+   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"
+
+struct dcesrv_socket_context {
+	const struct dcesrv_endpoint *endpoint;
+	struct dcesrv_context *dcesrv_ctx;	
+};
+
+/*
+  write_fn callback for dcesrv_output()
+*/
+static ssize_t dcerpc_write_fn(void *private, DATA_BLOB *out)
+{
+	NTSTATUS status;
+	struct socket_context *sock = private;
+	size_t sendlen;
+
+	status = socket_send(sock, sock, out, &sendlen, 0);
+	if (!NT_STATUS_IS_OK(status)) {
+		return -1;
+	}
+
+	return sendlen;
+}
+
+void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
+{
+	server_terminate_connection(dce_conn->srv_conn, reason);
+}
+
+static void add_socket_rpc_unix(struct server_service *service,
+				const struct model_ops *model_ops,
+				struct dcesrv_context *dce_ctx,
+				struct dcesrv_endpoint *e)
+{
+	struct server_socket *sock;
+	struct dcesrv_socket_context *dcesrv_sock;
+	uint16_t port = 1;
+
+	sock = service_setup_socket(service,model_ops, "unix", e->ep_description.options[0], &port);
+	if (!sock) {
+		DEBUG(0,("service_setup_socket(path=%s) failed\n",e->ep_description.options[0]));
+		return;
+	}
+
+	dcesrv_sock = talloc_p(sock, struct dcesrv_socket_context);
+	if (!dcesrv_sock) {
+		DEBUG(0,("talloc_p(sock->mem_ctx, struct dcesrv_socket_context) failed\n"));
+		return;
+	}
+
+	/* remember the endpoint of this socket */
+	dcesrv_sock->endpoint		= e;
+	dcesrv_sock->dcesrv_ctx		= dce_ctx;
+
+	sock->private_data = dcesrv_sock;
+}
+
+static void add_socket_rpc_ncalrpc(struct server_service *service,
+							const struct model_ops *model_ops,
+							struct dcesrv_context *dce_ctx, 
+							struct dcesrv_endpoint *e)
+{
+	struct server_socket *sock;
+	struct dcesrv_socket_context *dcesrv_sock;
+	uint16_t port = 1;
+	char *full_path;
+
+	if (!e->ep_description.options) {
+		e->ep_description.options = talloc_array_p(dce_ctx, const char *, 2);
+		e->ep_description.options[0] = NULL; 
+	}
+
+	if (!e->ep_description.options[0]) {
+		/* No identifier specified: generate one */
+		e->ep_description.options[0] = generate_random_str(dce_ctx, 10);
+		e->ep_description.options[1] = NULL;
+	}
+
+	full_path = talloc_asprintf(dce_ctx, "%s/%s", lp_ncalrpc_dir(), e->ep_description.options[0]);
+
+	sock = service_setup_socket(service,model_ops, "unix", full_path, &port);
+	if (!sock) {
+		DEBUG(0,("service_setup_socket(identifier=%s,path=%s) failed\n",e->ep_description.options[0], full_path));
+		return;
+	}
+
+	dcesrv_sock = talloc_p(sock, struct dcesrv_socket_context);
+	if (!dcesrv_sock) {
+		DEBUG(0,("talloc_p(sock->mem_ctx, struct dcesrv_socket_context) failed\n"));
+		return;
+	}
+
+	/* remember the endpoint of this socket */
+	dcesrv_sock->endpoint		= e;
+	dcesrv_sock->dcesrv_ctx		= dce_ctx;
+
+	sock->private_data = dcesrv_sock;
+
+	return;
+}
+
+/*
+  add a socket address to the list of events, one event per dcerpc endpoint
+*/
+static void add_socket_rpc_tcp_iface(struct server_service *service, 
+		       const struct model_ops *model_ops,
+		       struct dcesrv_context *dce_ctx, 
+			   struct dcesrv_endpoint *e,
+		       struct in_addr *ifip)
+{
+	struct server_socket *sock;
+	struct dcesrv_socket_context *dcesrv_sock;
+	uint16_t port = 0;
+	const char *ip_str = talloc_strdup(service, inet_ntoa(*ifip));
+			
+	if (e->ep_description.options && e->ep_description.options[0]) 
+		port = atoi(e->ep_description.options[0]);
+
+	sock = service_setup_socket(service,model_ops, "ipv4", ip_str, &port);
+	if (!sock) {
+		DEBUG(0,("service_setup_socket(port=%u) failed\n",port));
+		return;
+	}
+
+	/* And put the settings back into the binding. This will 
+	 * go away once we store the 'encoded' endpoint instead of a 
+	 * string describing it */
+	if (e->ep_description.options == NULL) {
+		e->ep_description.options = talloc_array_p(dce_ctx, const char *, 2);
+		e->ep_description.options[0] = talloc_asprintf(dce_ctx, "%d", port);
+		e->ep_description.options[1] = NULL;
+	}
+
+	dcesrv_sock = talloc_p(sock, struct dcesrv_socket_context);
+	if (!dcesrv_sock) {
+		DEBUG(0,("talloc_p(sock->mem_ctx, struct dcesrv_socket_context) failed\n"));
+		return;
+	}
+
+	/* remember the endpoint of this socket */
+	dcesrv_sock->endpoint		= e;
+	dcesrv_sock->dcesrv_ctx		= dce_ctx;
+
+	sock->private_data = dcesrv_sock;
+
+	talloc_free(ip_str);
+
+	return;
+}
+
+static void add_socket_rpc_tcp(struct server_service *service,
+							const struct model_ops *model_ops,
+							struct dcesrv_context *dce_ctx, 
+							struct dcesrv_endpoint *e)
+{
+	/* Add TCP/IP sockets */
+	if (lp_interfaces() && lp_bind_interfaces_only()) {
+		int num_interfaces = iface_count();
+		int i;
+		for(i = 0; i < num_interfaces; i++) {
+			struct in_addr *ifip = iface_n_ip(i);
+			if (ifip == NULL) {
+				continue;
+			}
+			add_socket_rpc_tcp_iface(service, model_ops, dce_ctx, e, ifip);
+		}
+	} else {
+		struct in_addr *ifip;
+		ifip = interpret_addr2(dce_ctx, lp_socket_address());
+		add_socket_rpc_tcp_iface(service, model_ops, dce_ctx, e, ifip);
+		talloc_free(ifip);
+	}
+
+	return;
+}
+
+/****************************************************************************
+ Open the listening sockets for RPC over NCACN_IP_TCP/NCALRPC/NCACN_UNIX_STREAM
+****************************************************************************/
+void dcesrv_sock_init(struct server_service *service, const struct model_ops *model_ops, struct dcesrv_context *dce_ctx)
+{
+	struct dcesrv_endpoint *e;
+
+	DEBUG(1,("dcesrv_sock_init\n"));
+
+	for (e=dce_ctx->endpoint_list;e;e=e->next) {
+		switch (e->ep_description.transport) {
+		case NCACN_UNIX_STREAM:
+			add_socket_rpc_unix(service, model_ops, dce_ctx, e);
+			break;
+		
+		case NCALRPC:
+			add_socket_rpc_ncalrpc(service, model_ops, dce_ctx, e);
+			break;
+
+		case NCACN_IP_TCP:
+			add_socket_rpc_tcp(service, model_ops, dce_ctx, e);
+			break;
+
+		default:
+			break;
+		}
+	}
+
+	return;	
+}
+
+void dcesrv_sock_accept(struct server_connection *conn)
+{
+	NTSTATUS status;
+	struct dcesrv_socket_context *dcesrv_sock = conn->server_socket->private_data;
+	struct dcesrv_connection *dcesrv_conn = NULL;
+
+	DEBUG(5,("dcesrv_sock_accept\n"));
+
+	status = dcesrv_endpoint_connect(dcesrv_sock->dcesrv_ctx, dcesrv_sock->endpoint, &dcesrv_conn);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("dcesrv_sock_accept: dcesrv_endpoint_connect failed: %s\n", 
+			nt_errstr(status)));
+		return;
+	}
+
+	dcesrv_conn->srv_conn = conn;
+
+	conn->private_data = dcesrv_conn;
+
+	return;	
+}
+
+void dcesrv_sock_recv(struct server_connection *conn, time_t t, uint16_t flags)
+{
+	NTSTATUS status;
+	struct dcesrv_connection *dce_conn = conn->private_data;
+	DATA_BLOB tmp_blob;
+
+	DEBUG(10,("dcesrv_sock_recv\n"));
+
+	status = socket_recv(conn->socket, conn->socket, &tmp_blob, 0x4000, 0);
+	if (!NT_STATUS_IS_OK(status)) {
+		if (NT_STATUS_IS_ERR(status)) {
+			dcesrv_terminate_connection(dce_conn, "eof on socket");
+			return;
+		}
+		return;
+	}
+
+	status = dcesrv_input(dce_conn, &tmp_blob);
+	talloc_free(tmp_blob.data);
+	if (!NT_STATUS_IS_OK(status)) {
+		dcesrv_terminate_connection(dce_conn, "eof on socket");
+		return;
+	}
+
+	if (dce_conn->call_list && dce_conn->call_list->replies) {
+		conn->event.fde->flags |= EVENT_FD_WRITE;
+	}
+
+	return;	
+}
+
+void dcesrv_sock_send(struct server_connection *conn, time_t t, uint16_t flags)
+{
+	struct dcesrv_connection *dce_conn = conn->private_data;
+	NTSTATUS status;
+
+	DEBUG(10,("dcesrv_sock_send\n"));
+
+	status = dcesrv_output(dce_conn, conn->socket, dcerpc_write_fn);
+	if (!NT_STATUS_IS_OK(status)) {
+		dcesrv_terminate_connection(dce_conn, "eof on socket");
+		return;
+	}
+
+	if (!dce_conn->call_list || !dce_conn->call_list->replies) {
+		conn->event.fde->flags &= ~EVENT_FD_WRITE;
+	}
+
+	return;
+}
+
+void dcesrv_sock_idle(struct server_connection *conn, time_t t)
+{
+	DEBUG(10,("dcesrv_sock_idle\n"));
+	conn->event.idle->next_event = t + 5;
+
+	return;	
+}
+
+void dcesrv_sock_close(struct server_connection *conn, const char *reason)
+{
+	struct dcesrv_connection *dce_conn = conn->private_data;
+
+	DEBUG(5,("dcesrv_sock_close: %s\n",reason));
+
+	talloc_free(dce_conn);
+
+	return;
+}
+
+void dcesrv_sock_exit(struct server_service *service, const char *reason)
+{
+	DEBUG(1,("dcesrv_sock_exit: %s\n",reason));
+	return;
+}