source4/libcli/raw/rawnegotiate.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB client negotiate context management functions
   5
   6    Copyright (C) Andrew Tridgell 1994-2005
   7    Copyright (C) James Myers 2003 <myersjj@samba.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include <tevent.h>
  25 #include "system/time.h"
  26 #include "libcli/raw/libcliraw.h"
  27 #include "libcli/raw/raw_proto.h"
  28 #include "../libcli/smb/smbXcli_base.h"
  29 #include "../lib/util/tevent_ntstatus.h"
  30
  31 struct smb_raw_negotiate_state {
  32         struct smbcli_transport *transport;
  33 };
  34
  35 static void smb_raw_negotiate_done(struct tevent_req *subreq);
  36
  37 struct tevent_req *smb_raw_negotiate_send(TALLOC_CTX *mem_ctx,
  38                                           struct tevent_context *ev,
  39                                           struct smbcli_transport *transport,
  40                                           int minprotocol,
  41                                           int maxprotocol)
  42 {
  43         struct tevent_req *req;
  44         struct smb_raw_negotiate_state *state;
  45         struct tevent_req *subreq;
  46         uint32_t timeout_msec = transport->options.request_timeout * 1000;
  47
  48         req = tevent_req_create(mem_ctx, &state,
  49                                 struct smb_raw_negotiate_state);;
  50         if (req == NULL) {
  51                 return NULL;
  52         }
  53         state->transport = transport;
  54
  55         if (maxprotocol > PROTOCOL_NT1) {
  56                 maxprotocol = PROTOCOL_NT1;
  57         }
  58
  59         subreq = smbXcli_negprot_send(state, ev,
  60                                       transport->conn,
  61                                       timeout_msec,
  62                                       minprotocol,
  63                                       maxprotocol);
  64         if (tevent_req_nomem(subreq, req)) {
  65                 return tevent_req_post(req, ev);
  66         }
  67         tevent_req_set_callback(subreq, smb_raw_negotiate_done, req);
  68
  69         return req;
  70 }
  71
  72 static void smb_raw_negotiate_done(struct tevent_req *subreq)
  73 {
  74         struct tevent_req *req =
  75                 tevent_req_callback_data(subreq,
  76                 struct tevent_req);
  77         struct smb_raw_negotiate_state *state =
  78                 tevent_req_data(req,
  79                 struct smb_raw_negotiate_state);
  80         struct smbcli_negotiate *n = &state->transport->negotiate;
  81         struct smbXcli_conn *c = state->transport->conn;
  82         NTSTATUS status;
  83         NTTIME ntt;
  84
  85         status = smbXcli_negprot_recv(subreq);
  86         TALLOC_FREE(subreq);
  87         if (tevent_req_nterror(req, status)) {
  88                 return;
  89         }
  90
  91         n->protocol = smbXcli_conn_protocol(c);
  92
  93         n->sec_mode = smb1cli_conn_server_security_mode(c);
  94         n->max_mux  = smbXcli_conn_max_requests(c);
  95         n->max_xmit = smb1cli_conn_max_xmit(c);
  96         n->sesskey  = smb1cli_conn_server_session_key(c);
  97         n->capabilities = smb1cli_conn_capabilities(c);;
  98
  99         /* this time arrives in real GMT */
 100         ntt = smbXcli_conn_server_system_time(c);
 101         n->server_time = nt_time_to_unix(ntt);
 102         n->server_zone = smb1cli_conn_server_time_zone(c);
 103
 104         if (n->capabilities & CAP_EXTENDED_SECURITY) {
 105                 const DATA_BLOB *b = smbXcli_conn_server_gss_blob(c);
 106                 if (b) {
 107                         n->secblob = *b;
 108                 }
 109         } else {
 110                 const uint8_t *p = smb1cli_conn_server_challenge(c);
 111                 if (p) {
 112                         n->secblob = data_blob_const(p, 8);
 113                 }
 114         }
 115
 116         n->readbraw_supported = smb1cli_conn_server_readbraw(c);
 117         n->readbraw_supported = smb1cli_conn_server_writebraw(c);
 118         n->lockread_supported = smb1cli_conn_server_lockread(c);
 119
 120         tevent_req_done(req);
 121 }
 122
 123 /*
 124  Send a negprot command.
 125 */
 126 NTSTATUS smb_raw_negotiate_recv(struct tevent_req *req)
 127 {
 128         return tevent_req_simple_recv_ntstatus(req);
 129 }
 130
 131
 132 /*
 133  Send a negprot command (sync interface)
 134 */
 135 NTSTATUS smb_raw_negotiate(struct smbcli_transport *transport, bool unicode,
 136                            int minprotocol, int maxprotocol)
 137 {
 138         NTSTATUS status = NT_STATUS_INTERNAL_ERROR;
 139         struct tevent_req *subreq = NULL;
 140         bool ok;
 141
 142         subreq = smb_raw_negotiate_send(transport,
 143                                         transport->ev,
 144                                         transport,
 145                                         minprotocol,
 146                                         maxprotocol);
 147         if (subreq == NULL) {
 148                 return NT_STATUS_NO_MEMORY;
 149         }
 150
 151         ok = tevent_req_poll(subreq, transport->ev);
 152         if (!ok) {
 153                 status = map_nt_error_from_unix_common(errno);
 154                 goto failed;
 155         }
 156
 157         status = smb_raw_negotiate_recv(subreq);
 158
 159 failed:
 160         TALLOC_FREE(subreq);
 161         return status;
 162 }