source: trunk/server/source3/winbindd/wb_lookupsid.c

/*
   Unix SMB/CIFS implementation.
   async lookupsid
   Copyright (C) Volker Lendecke 2009

   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 "winbindd.h"
#include "librpc/gen_ndr/ndr_wbint_c.h"
#include "../libcli/security/security.h"

struct wb_lookupsid_state {
        struct tevent_context *ev;
        struct winbindd_domain *lookup_domain;
        struct dom_sid sid;
        enum lsa_SidType type;
        const char *domname;
        const char *name;
};

static void wb_lookupsid_done(struct tevent_req *subreq);

struct tevent_req *wb_lookupsid_send(TALLOC_CTX *mem_ctx,
                                     struct tevent_context *ev,
                                     const struct dom_sid *sid)
{
        struct tevent_req *req, *subreq;
        struct wb_lookupsid_state *state;

        req = tevent_req_create(mem_ctx, &state, struct wb_lookupsid_state);
        if (req == NULL) {
                return NULL;
        }
        sid_copy(&state->sid, sid);
        state->ev = ev;

        state->lookup_domain = find_lookup_domain_from_sid(sid);
        if (state->lookup_domain == NULL) {
                DEBUG(5, ("Could not find domain for sid %s\n",
                          sid_string_dbg(sid)));
                tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
                return tevent_req_post(req, ev);
        }

        subreq = dcerpc_wbint_LookupSid_send(
                state, ev, dom_child_handle(state->lookup_domain),
                &state->sid, &state->type, &state->domname, &state->name);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, wb_lookupsid_done, req);
        return req;
}

static void wb_lookupsid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct wb_lookupsid_state *state = tevent_req_data(
                req, struct wb_lookupsid_state);
        struct winbindd_domain *forest_root;
        NTSTATUS status, result;

        status = dcerpc_wbint_LookupSid_recv(subreq, state, &result);
        TALLOC_FREE(subreq);
        if (tevent_req_nterror(req, status)) {
                return;
        }
        if (NT_STATUS_IS_OK(result)) {
                tevent_req_done(req);
                return;
        }

        /*
         * Let's try the forest root
         */
        forest_root = find_root_domain();
        if ((forest_root == NULL) || (forest_root == state->lookup_domain)) {
                tevent_req_nterror(req, result);
                return;
        }
        state->lookup_domain = forest_root;

        subreq = dcerpc_wbint_LookupSid_send(
                state, state->ev, dom_child_handle(state->lookup_domain),
                &state->sid, &state->type, &state->domname, &state->name);
        if (tevent_req_nomem(subreq, req)) {
                return;
        }
        tevent_req_set_callback(subreq, wb_lookupsid_done, req);
}

NTSTATUS wb_lookupsid_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
                           enum lsa_SidType *type, const char **domain,
                           const char **name)
{
        struct wb_lookupsid_state *state = tevent_req_data(
                req, struct wb_lookupsid_state);
        NTSTATUS status;

        if (tevent_req_is_nterror(req, &status)) {
                return status;
        }
        *type = state->type;
        *domain = talloc_move(mem_ctx, &state->domname);
        *name = talloc_move(mem_ctx, &state->name);
        return NT_STATUS_OK;
}