source4/libcli/raw/clisocket.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB client socket 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 "lib/events/events.h"
  25 #include "libcli/raw/libcliraw.h"
  26 #include "libcli/composite/composite.h"
  27 #include "lib/socket/socket.h"
  28 #include "libcli/resolve/resolve.h"
  29 #include "param/param.h"
  30 #include "libcli/raw/raw_proto.h"
  31
  32 struct sock_connect_state {
  33         struct composite_context *ctx;
  34         const char *host_name;
  35         int num_ports;
  36         uint16_t *ports;
  37         const char *socket_options;
  38         struct smbcli_socket *result;
  39 };
  40
  41 /*
  42   connect a smbcli_socket context to an IP/port pair
  43   if port is 0 then choose 445 then 139
  44 */
  45
  46 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);
  47
  48 struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
  49                                                    const char *host_addr,
  50                                                    const char **ports,
  51                                                    const char *host_name,
  52                                                    struct resolve_context *resolve_ctx,
  53                                                    struct tevent_context *event_ctx,
  54                                                    const char *socket_options)
  55 {
  56         struct composite_context *result, *ctx;
  57         struct sock_connect_state *state;
  58         int i;
  59
  60         result = talloc_zero(mem_ctx, struct composite_context);
  61         if (result == NULL) goto failed;
  62         result->state = COMPOSITE_STATE_IN_PROGRESS;
  63
  64         result->event_ctx = talloc_reference(result, event_ctx);
  65         if (result->event_ctx == NULL) goto failed;
  66
  67         state = talloc(result, struct sock_connect_state);
  68         if (state == NULL) goto failed;
  69         state->ctx = result;
  70         result->private_data = state;
  71
  72         state->host_name = talloc_strdup(state, host_name);
  73         if (state->host_name == NULL) goto failed;
  74
  75         state->num_ports = str_list_length(ports);
  76         state->ports = talloc_array(state, uint16_t, state->num_ports);
  77         if (state->ports == NULL) goto failed;
  78         for (i=0;ports[i];i++) {
  79                 state->ports[i] = atoi(ports[i]);
  80         }
  81         state->socket_options = talloc_reference(state, socket_options);
  82
  83         ctx = socket_connect_multi_send(state, host_addr,
  84                                         state->num_ports, state->ports,
  85                                         resolve_ctx,
  86                                         state->ctx->event_ctx);
  87         if (ctx == NULL) goto failed;
  88         ctx->async.fn = smbcli_sock_connect_recv_conn;
  89         ctx->async.private_data = state;
  90         return result;
  91
  92 failed:
  93         talloc_free(result);
  94         return NULL;
  95 }
  96
  97 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
  98 {
  99         struct sock_connect_state *state =
 100                 talloc_get_type(ctx->async.private_data,
 101                                 struct sock_connect_state);
 102         struct socket_context *sock;
 103         uint16_t port;
 104
 105         state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
 106                                                        &port);
 107         if (!composite_is_ok(state->ctx)) return;
 108
 109         state->ctx->status =
 110                 socket_set_option(sock, state->socket_options, NULL);
 111         if (!composite_is_ok(state->ctx)) return;
 112
 113
 114         state->result = talloc_zero(state, struct smbcli_socket);
 115         if (composite_nomem(state->result, state->ctx)) return;
 116
 117         state->result->sock = talloc_steal(state->result, sock);
 118         state->result->port = port;
 119         state->result->hostname = talloc_steal(sock, state->host_name);
 120
 121         state->result->event.ctx =
 122                 talloc_reference(state->result, state->ctx->event_ctx);
 123         if (composite_nomem(state->result->event.ctx, state->ctx)) return;
 124
 125         composite_done(state->ctx);
 126 }
 127
 128 /*
 129   finish a smbcli_sock_connect_send() operation
 130 */
 131 NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
 132                                   TALLOC_CTX *mem_ctx,
 133                                   struct smbcli_socket **result)
 134 {
 135         NTSTATUS status = composite_wait(c);
 136         if (NT_STATUS_IS_OK(status)) {
 137                 struct sock_connect_state *state =
 138                         talloc_get_type(c->private_data,
 139                                         struct sock_connect_state);
 140                 *result = talloc_steal(mem_ctx, state->result);
 141         }
 142         talloc_free(c);
 143         return status;
 144 }
 145
 146 /*
 147   connect a smbcli_socket context to an IP/port pair
 148   if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
 149
 150   sync version of the function
 151 */
 152 NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
 153                              const char *host_addr, const char **ports,
 154                              const char *host_name,
 155                              struct resolve_context *resolve_ctx,
 156                              struct tevent_context *event_ctx,
 157                                  const char *socket_options,
 158                              struct smbcli_socket **result)
 159 {
 160         struct composite_context *c =
 161                 smbcli_sock_connect_send(mem_ctx, host_addr, ports, host_name,
 162                                          resolve_ctx,
 163                                          event_ctx, socket_options);
 164         return smbcli_sock_connect_recv(c, mem_ctx, result);
 165 }
 166
 167
 168 /****************************************************************************
 169  mark the socket as dead
 170 ****************************************************************************/
 171 _PUBLIC_ void smbcli_sock_dead(struct smbcli_socket *sock)
 172 {
 173         talloc_free(sock->event.fde);
 174         sock->event.fde = NULL;
 175         talloc_free(sock->sock);
 176         sock->sock = NULL;
 177 }
 178
 179 /****************************************************************************
 180  Set socket options on a open connection.
 181 ****************************************************************************/
 182 void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
 183 {
 184         socket_set_option(sock->sock, options, NULL);
 185 }
 186
 187 /****************************************************************************
 188 resolve a hostname and connect
 189 ****************************************************************************/
 190 _PUBLIC_ struct smbcli_socket *smbcli_sock_connect_byname(const char *host, const char **ports,
 191                                                  TALLOC_CTX *mem_ctx,
 192                                                  struct resolve_context *resolve_ctx,
 193                                                  struct tevent_context *event_ctx,
 194                                                  const char *socket_options)
 195 {
 196         int name_type = NBT_NAME_SERVER;
 197         const char *address;
 198         NTSTATUS status;
 199         struct nbt_name nbt_name;
 200         char *name, *p;
 201         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 202         struct smbcli_socket *result;
 203
 204         if (event_ctx == NULL) {
 205                 DEBUG(0, ("Invalid NULL event context passed in as parameter\n"));
 206                 return NULL;
 207         }
 208
 209         if (tmp_ctx == NULL) {
 210                 DEBUG(0, ("talloc_new failed\n"));
 211                 return NULL;
 212         }
 213
 214         name = talloc_strdup(tmp_ctx, host);
 215         if (name == NULL) {
 216                 DEBUG(0, ("talloc_strdup failed\n"));
 217                 talloc_free(tmp_ctx);
 218                 return NULL;
 219         }
 220
 221         /* allow hostnames of the form NAME#xx and do a netbios lookup */
 222         if ((p = strchr(name, '#'))) {
 223                 name_type = strtol(p+1, NULL, 16);
 224                 *p = 0;
 225         }
 226
 227         make_nbt_name(&nbt_name, host, name_type);
 228
 229         status = resolve_name(resolve_ctx, &nbt_name, tmp_ctx, &address, event_ctx);
 230         if (!NT_STATUS_IS_OK(status)) {
 231                 talloc_free(tmp_ctx);
 232                 return NULL;
 233         }
 234
 235         status = smbcli_sock_connect(mem_ctx, address, ports, name, resolve_ctx,
 236                                      event_ctx,
 237                                          socket_options, &result);
 238
 239         if (!NT_STATUS_IS_OK(status)) {
 240                 DEBUG(9, ("smbcli_sock_connect failed: %s\n",
 241                           nt_errstr(status)));
 242                 talloc_free(tmp_ctx);
 243                 return NULL;
 244         }
 245
 246         talloc_free(tmp_ctx);
 247
 248         return result;
 249 }