source/libcli/smb2/connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 composite connection setup
   5
   6    Copyright (C) Andrew Tridgell 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/raw/libcliraw.h"
  24 #include "libcli/smb2/smb2.h"
  25 #include "libcli/smb2/smb2_calls.h"
  26 #include "libcli/composite/composite.h"
  27 #include "libcli/resolve/resolve.h"
  28 #include "param/param.h"
  29
  30 struct smb2_connect_state {
  31         struct cli_credentials *credentials;
  32         const char *host;
  33         const char *share;
  34         struct smb2_negprot negprot;
  35         struct smb2_tree_connect tcon;
  36         struct smb2_session *session;
  37         struct smb2_tree *tree;
  38 };
  39
  40 /*
  41   continue after tcon reply
  42 */
  43 static void continue_tcon(struct smb2_request *req)
  44 {
  45         struct composite_context *c = talloc_get_type(req->async.private,
  46                                                       struct composite_context);
  47         struct smb2_connect_state *state = talloc_get_type(c->private_data,
  48                                                            struct smb2_connect_state);
  49
  50         c->status = smb2_tree_connect_recv(req, &state->tcon);
  51         if (!composite_is_ok(c)) return;
  52
  53         state->tree->tid = state->tcon.out.tid;
  54
  55         composite_done(c);
  56 }
  57
  58 /*
  59   continue after a session setup
  60 */
  61 static void continue_session(struct composite_context *creq)
  62 {
  63         struct composite_context *c = talloc_get_type(creq->async.private_data,
  64                                                       struct composite_context);
  65         struct smb2_connect_state *state = talloc_get_type(c->private_data,
  66                                                            struct smb2_connect_state);
  67         struct smb2_request *req;
  68
  69         c->status = smb2_session_setup_spnego_recv(creq);
  70         if (!composite_is_ok(c)) return;
  71
  72         state->tree = smb2_tree_init(state->session, state, true);
  73         if (composite_nomem(state->tree, c)) return;
  74
  75         state->tcon.in.unknown1 = 0x09;
  76         state->tcon.in.path     = talloc_asprintf(state, "\\\\%s\\%s",
  77                                                   state->host, state->share);
  78         if (composite_nomem(state->tcon.in.path, c)) return;
  79
  80         req = smb2_tree_connect_send(state->tree, &state->tcon);
  81         if (composite_nomem(req, c)) return;
  82
  83         req->async.fn = continue_tcon;
  84         req->async.private = c;
  85 }
  86
  87 /*
  88   continue after negprot reply
  89 */
  90 static void continue_negprot(struct smb2_request *req)
  91 {
  92         struct composite_context *c = talloc_get_type(req->async.private,
  93                                                       struct composite_context);
  94         struct smb2_connect_state *state = talloc_get_type(c->private_data,
  95                                                            struct smb2_connect_state);
  96         struct smb2_transport *transport = req->transport;
  97         struct composite_context *creq;
  98
  99         c->status = smb2_negprot_recv(req, c, &state->negprot);
 100         if (!composite_is_ok(c)) return;
 101
 102         state->session = smb2_session_init(transport, global_loadparm, state, true);
 103         if (composite_nomem(state->session, c)) return;
 104
 105         creq = smb2_session_setup_spnego_send(state->session, state->credentials);
 106
 107         composite_continue(c, creq, continue_session, c);
 108 }
 109
 110 /*
 111   continue after a socket connect completes
 112 */
 113 static void continue_socket(struct composite_context *creq)
 114 {
 115         struct composite_context *c = talloc_get_type(creq->async.private_data,
 116                                                       struct composite_context);
 117         struct smb2_connect_state *state = talloc_get_type(c->private_data,
 118                                                            struct smb2_connect_state);
 119         struct smbcli_socket *sock;
 120         struct smb2_transport *transport;
 121         struct smb2_request *req;
 122
 123         c->status = smbcli_sock_connect_recv(creq, state, &sock);
 124         if (!composite_is_ok(c)) return;
 125
 126         transport = smb2_transport_init(sock, state);
 127         if (composite_nomem(transport, c)) return;
 128
 129         ZERO_STRUCT(state->negprot);
 130         state->negprot.in.unknown1 = 0x0001;
 131
 132         req = smb2_negprot_send(transport, &state->negprot);
 133         if (composite_nomem(req, c)) return;
 134
 135         req->async.fn = continue_negprot;
 136         req->async.private = c;
 137 }
 138
 139
 140 /*
 141   continue after a resolve finishes
 142 */
 143 static void continue_resolve(struct composite_context *creq)
 144 {
 145         struct composite_context *c = talloc_get_type(creq->async.private_data,
 146                                                       struct composite_context);
 147         struct smb2_connect_state *state = talloc_get_type(c->private_data,
 148                                                            struct smb2_connect_state);
 149         const char *addr;
 150
 151         c->status = resolve_name_recv(creq, state, &addr);
 152         if (!composite_is_ok(c)) return;
 153
 154         creq = smbcli_sock_connect_send(state, addr, 445, state->host, c->event_ctx);
 155
 156         composite_continue(c, creq, continue_socket, c);
 157 }
 158
 159 /*
 160   a composite function that does a full negprot/sesssetup/tcon, returning
 161   a connected smb2_tree
 162  */
 163 struct composite_context *smb2_connect_send(TALLOC_CTX *mem_ctx,
 164                                             const char *host,
 165                                             const char *share,
 166                                             struct resolve_context *resolve_ctx,
 167                                             struct cli_credentials *credentials,
 168                                             struct event_context *ev)
 169 {
 170         struct composite_context *c;
 171         struct smb2_connect_state *state;
 172         struct nbt_name name;
 173         struct composite_context *creq;
 174
 175         c = composite_create(mem_ctx, ev);
 176         if (c == NULL) return NULL;
 177
 178         state = talloc(c, struct smb2_connect_state);
 179         if (composite_nomem(state, c)) return c;
 180         c->private_data = state;
 181
 182         state->credentials = credentials;
 183         state->host = talloc_strdup(c, host);
 184         if (composite_nomem(state->host, c)) return c;
 185         state->share = talloc_strdup(c, share);
 186         if (composite_nomem(state->share, c)) return c;
 187
 188         ZERO_STRUCT(name);
 189         name.name = host;
 190
 191         creq = resolve_name_send(resolve_ctx, &name, c->event_ctx);
 192         composite_continue(c, creq, continue_resolve, c);
 193         return c;
 194 }
 195
 196 /*
 197   receive a connect reply
 198 */
 199 NTSTATUS smb2_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 200                            struct smb2_tree **tree)
 201 {
 202         NTSTATUS status;
 203         struct smb2_connect_state *state = talloc_get_type(c->private_data,
 204                                                            struct smb2_connect_state);
 205         status = composite_wait(c);
 206         if (NT_STATUS_IS_OK(status)) {
 207                 *tree = talloc_steal(mem_ctx, state->tree);
 208         }
 209         talloc_free(c);
 210         return status;
 211 }
 212
 213 /*
 214   sync version of smb2_connect
 215 */
 216 NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
 217                       const char *host, const char *share,
 218                       struct resolve_context *resolve_ctx,
 219                       struct cli_credentials *credentials,
 220                       struct smb2_tree **tree,
 221                       struct event_context *ev)
 222 {
 223         struct composite_context *c = smb2_connect_send(mem_ctx, host, share,
 224                                                         resolve_ctx,
 225                                                         credentials, ev);
 226         return smb2_connect_recv(c, mem_ctx, tree);
 227 }