source: trunk/server/source4/nbt_server/dgram/ntlogon.c

/* 
   Unix SMB/CIFS implementation.

   NBT datagram ntlogon server

   Copyright (C) Andrew Tridgell        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 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 "nbt_server/nbt_server.h"
#include "smbd/service_task.h"
#include "lib/socket/socket.h"
#include "librpc/gen_ndr/ndr_nbt.h"
#include "param/param.h"

/*
  reply to a SAM LOGON request
 */
static void nbtd_ntlogon_sam_logon(struct dgram_mailslot_handler *dgmslot, 
                                   struct nbtd_interface *iface,
                                   struct nbt_dgram_packet *packet,
                                   const struct socket_address *src,
                                   struct nbt_ntlogon_packet *ntlogon)
{
        struct nbt_name *name = &packet->data.msg.dest_name;
        struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
        struct nbt_ntlogon_packet reply;
        struct nbt_ntlogon_sam_logon_reply *logon;

        /* only answer sam logon requests on the PDC or LOGON names */
        if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
                return;
        }

        /* setup a SAM LOGON reply */
        ZERO_STRUCT(reply);
        reply.command = NTLOGON_SAM_LOGON_REPLY;
        logon = &reply.req.reply;

        logon->server           = talloc_asprintf(packet, "\\\\%s", 
                                                  lpcfg_netbios_name(iface->nbtsrv->task->lp_ctx));
        logon->user_name        = ntlogon->req.logon.user_name;
        logon->domain           = lpcfg_workgroup(iface->nbtsrv->task->lp_ctx);
        logon->nt_version       = 1;
        logon->lmnt_token       = 0xFFFF;
        logon->lm20_token       = 0xFFFF;

        packet->data.msg.dest_name.type = 0;

        dgram_mailslot_ntlogon_reply(reply_iface->dgmsock, 
                                     packet, 
                                     lpcfg_netbios_name(iface->nbtsrv->task->lp_ctx),
                                     ntlogon->req.logon.mailslot_name,
                                     &reply);
}

/*
  handle incoming ntlogon mailslot requests
*/
void nbtd_mailslot_ntlogon_handler(struct dgram_mailslot_handler *dgmslot, 
                                   struct nbt_dgram_packet *packet, 
                                   struct socket_address *src)
{
        NTSTATUS status = NT_STATUS_NO_MEMORY;
        struct nbtd_interface *iface = 
                talloc_get_type(dgmslot->private_data, struct nbtd_interface);
        struct nbt_ntlogon_packet *ntlogon = 
                talloc(dgmslot, struct nbt_ntlogon_packet);
        struct nbtd_iface_name *iname;
        struct nbt_name *name = &packet->data.msg.dest_name;

        if (ntlogon == NULL) goto failed;

        /*
          see if the we are listening on the destination netbios name
        */
        iname = nbtd_find_iname(iface, name, 0);
        if (iname == NULL) {
                status = NT_STATUS_BAD_NETWORK_NAME;
                goto failed;
        }

        DEBUG(2,("ntlogon request to %s from %s:%d\n", 
                 nbt_name_string(ntlogon, name), src->addr, src->port));
        status = dgram_mailslot_ntlogon_parse(dgmslot, ntlogon, packet, ntlogon);
        if (!NT_STATUS_IS_OK(status)) goto failed;

        NDR_PRINT_DEBUG(nbt_ntlogon_packet, ntlogon);

        switch (ntlogon->command) {
        case NTLOGON_SAM_LOGON:
                nbtd_ntlogon_sam_logon(dgmslot, iface, packet, src, ntlogon);
                break;
        default:
                DEBUG(2,("unknown ntlogon op %d from %s:%d\n", 
                         ntlogon->command, src->addr, src->port));
                break;
        }

        talloc_free(ntlogon);
        return;

failed:
        DEBUG(2,("nbtd ntlogon handler failed from %s:%d to %s - %s\n",
                 src->addr, src->port, nbt_name_string(ntlogon, name),
                 nt_errstr(status)));
        talloc_free(ntlogon);
}