s4:winbind: implement calls for allowing getent groups

This is to say getgrent and setgrent, and the associated technical objects (states, build directives,...) needed.

Signed-off-by: Matthias Dieter Wallnöfer <mwallnoefer@yahoo.de>

1 files changed, 124 insertions, 0 deletions

diff --git a/source4/winbind/wb_cmd_getgrent.c b/source4/winbind/wb_cmd_getgrent.c
new file mode 100644
index 00000000000..79a3aff852b
--- /dev/null
+++ b/source4/winbind/wb_cmd_getgrent.c
@@ -0,0 +1,124 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Command backend for getgrent
+
+   Copyright (C) Matthieu Patou 2010
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "libcli/composite/composite.h"
+#include "winbind/wb_server.h"
+#include "smbd/service_task.h"
+
+struct cmd_getgrent_state {
+	struct composite_context *ctx;
+	struct wbsrv_service *service;
+
+	struct wbsrv_grent *grent;
+	uint32_t max_groups;
+
+	uint32_t num_groups;
+	struct winbindd_gr *result;
+};
+
+static void cmd_getgrent_recv_grnam(struct composite_context *ctx);
+#if 0 /*FIXME: implement this*/
+static void cmd_getgrent_recv_user_list(struct composite_context *ctx);
+#endif
+
+struct composite_context *wb_cmd_getgrent_send(TALLOC_CTX *mem_ctx,
+		struct wbsrv_service *service, struct wbsrv_grent *grent,
+		uint32_t max_groups)
+{
+	struct composite_context *ctx, *result;
+	struct cmd_getgrent_state *state;
+
+	DEBUG(5, ("wb_cmd_getgrent_send called\n"));
+
+	result = composite_create(mem_ctx, service->task->event_ctx);
+	if (!result) return NULL;
+
+	state = talloc(mem_ctx, struct cmd_getgrent_state);
+	if (composite_nomem(state, result)) return result;
+
+	state->ctx = result;
+	result->private_data = state;
+	state->service = service;
+	state->grent = grent;
+	state->max_groups = max_groups;
+	state->num_groups = 0;
+
+	/* If there are groups left in the libnet_GroupList and we're below the
+	 * maximum number of groups to get per winbind getgrent call, use
+	 * getgrnam to get the winbindd_gr struct */
+	if (grent->page_index < grent->group_list->out.count) {
+		int idx = grent->page_index;
+		char *groupname = talloc_strdup(state,
+			grent->group_list->out.groups[idx].groupname);
+
+		grent->page_index++;
+		ctx = wb_cmd_getgrnam_send(state, service, groupname);
+		if (composite_nomem(ctx, state->ctx)) return result;
+
+		composite_continue(state->ctx, ctx, cmd_getgrent_recv_grnam,
+			state);
+	} else {
+	/* If there is no valid group left, call libnet_GroupList to get a new
+	 * list of group. */
+		composite_error(state->ctx, NT_STATUS_NO_MORE_ENTRIES);
+	}
+	return result;
+}
+
+static void cmd_getgrent_recv_grnam(struct composite_context *ctx)
+{
+	struct cmd_getgrent_state *state =
+		talloc_get_type(ctx->async.private_data,
+				struct cmd_getgrent_state);
+	struct winbindd_gr *gr;
+
+	DEBUG(5, ("cmd_getgrent_recv_grnam called\n"));
+
+	state->ctx->status = wb_cmd_getgrnam_recv(ctx, state, &gr);
+	if (!composite_is_ok(state->ctx)) return;
+
+	/*FIXME: Cheat for now and only get one group per call */
+	state->result = gr;
+
+	composite_done(state->ctx);
+}
+
+NTSTATUS wb_cmd_getgrent_recv(struct composite_context *ctx,
+		TALLOC_CTX *mem_ctx, struct winbindd_gr **gr,
+		uint32_t *num_groups)
+{
+	NTSTATUS status = composite_wait(ctx);
+
+	DEBUG(5, ("wb_cmd_getgrent_recv called\n"));
+
+	if (NT_STATUS_IS_OK(status)) {
+		struct cmd_getgrent_state *state =
+			talloc_get_type(ctx->private_data,
+					struct cmd_getgrent_state);
+		*gr = talloc_steal(mem_ctx, state->result);
+		/*FIXME: Cheat and only get one group */
+		*num_groups = 1;
+	}
+
+	talloc_free(ctx);
+	return status;
+}