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