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
  31 struct sock_connect_state {
  32         struct composite_context *ctx;
  33         const char *host_name;
  34         int num_ports;
  35         uint16_t *ports;
  36         const char *socket_options;
  37         struct smbcli_socket *result;
  38 };
  39
  40 /*
  41   connect a smbcli_socket context to an IP/port pair
  42   if port is 0 then choose 445 then 139
  43 */
  44
  45 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);
  46
  47 struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
  48                                                    const char *host_addr,
  49                                                    const char **ports,
  50                                                    const char *host_name,
  51                                                    struct resolve_context *resolve_ctx,
  52                                                    struct event_context *event_ctx)
  53 {
  54         struct composite_context *result, *ctx;
  55         struct sock_connect_state *state;
  56         int i;
  57
  58         result = talloc_zero(mem_ctx, struct composite_context);
  59         if (result == NULL) goto failed;
  60         result->state = COMPOSITE_STATE_IN_PROGRESS;
  61
  62         if (event_ctx != NULL) {
  63                 result->event_ctx = talloc_reference(result, event_ctx);
  64         } else {
  65                 result->event_ctx = event_context_init(result);
  66         }
  67
  68         if (result->event_ctx == NULL) goto failed;
  69
  70         state = talloc(result, struct sock_connect_state);
  71         if (state == NULL) goto failed;
  72         state->ctx = result;
  73         result->private_data = state;
  74
  75         state->host_name = talloc_strdup(state, host_name);
  76         if (state->host_name == NULL) goto failed;
  77
  78         state->num_ports = str_list_length(ports);
  79         state->ports = talloc_array(state, uint16_t, state->num_ports);
  80         if (state->ports == NULL) goto failed;
  81         for (i=0;ports[i];i++) {
  82                 state->ports[i] = atoi(ports[i]);
  83         }
  84         state->socket_options = lp_socket_options(global_loadparm);
  85
  86         ctx = socket_connect_multi_send(state, host_addr,
  87                                         state->num_ports, state->ports,
  88                                         resolve_ctx,
  89                                         state->ctx->event_ctx);
  90         if (ctx == NULL) goto failed;
  91         ctx->async.fn = smbcli_sock_connect_recv_conn;
  92         ctx->async.private_data = state;
  93         return result;
  94
  95 failed:
  96         talloc_free(result);
  97         return NULL;
  98 }
  99
 100 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
 101 {
 102         struct sock_connect_state *state =
 103                 talloc_get_type(ctx->async.private_data,
 104                                 struct sock_connect_state);
 105         struct socket_context *sock;
 106         uint16_t port;
 107
 108         state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
 109                                                        &port);
 110         if (!composite_is_ok(state->ctx)) return;
 111
 112         state->ctx->status =
 113                 socket_set_option(sock, state->socket_options, NULL);
 114         if (!composite_is_ok(state->ctx)) return;
 115
 116
 117         state->result = talloc_zero(state, struct smbcli_socket);
 118         if (composite_nomem(state->result, state->ctx)) return;
 119
 120         state->result->sock = talloc_steal(state->result, sock);
 121         state->result->port = port;
 122         state->result->hostname = talloc_steal(sock, state->host_name);
 123
 124         state->result->event.ctx =
 125                 talloc_reference(state->result, state->ctx->event_ctx);
 126         if (composite_nomem(state->result->event.ctx, state->ctx)) return;
 127
 128         composite_done(state->ctx);
 129 }
 130
 131 /*
 132   finish a smbcli_sock_connect_send() operation
 133 */
 134 NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
 135                                   TALLOC_CTX *mem_ctx,
 136                                   struct smbcli_socket **result)
 137 {
 138         NTSTATUS status = composite_wait(c);
 139         if (NT_STATUS_IS_OK(status)) {
 140                 struct sock_connect_state *state =
 141                         talloc_get_type(c->private_data,
 142                                         struct sock_connect_state);
 143                 *result = talloc_steal(mem_ctx, state->result);
 144         }
 145         talloc_free(c);
 146         return status;
 147 }
 148
 149 /*
 150   connect a smbcli_socket context to an IP/port pair
 151   if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
 152
 153   sync version of the function
 154 */
 155 NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
 156                              const char *host_addr, const char **ports,
 157                              const char *host_name,
 158                              struct resolve_context *resolve_ctx,
 159                              struct event_context *event_ctx,
 160                              struct smbcli_socket **result)
 161 {
 162         struct composite_context *c =
 163                 smbcli_sock_connect_send(mem_ctx, host_addr, ports, host_name,
 164                                          resolve_ctx,
 165                                          event_ctx);
 166         return smbcli_sock_connect_recv(c, mem_ctx, result);
 167 }
 168
 169
 170 /****************************************************************************
 171  mark the socket as dead
 172 ****************************************************************************/
 173 void smbcli_sock_dead(struct smbcli_socket *sock)
 174 {
 175         talloc_free(sock->event.fde);
 176         sock->event.fde = NULL;
 177         talloc_free(sock->sock);
 178         sock->sock = NULL;
 179 }
 180
 181 /****************************************************************************
 182  Set socket options on a open connection.
 183 ****************************************************************************/
 184 void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
 185 {
 186         socket_set_option(sock->sock, options, NULL);
 187 }
 188
 189 /****************************************************************************
 190 resolve a hostname and connect
 191 ****************************************************************************/
 192 struct smbcli_socket *smbcli_sock_connect_byname(const char *host, const char **ports,
 193                                                  TALLOC_CTX *mem_ctx,
 194                                                  struct resolve_context *resolve_ctx,
 195                                                  struct event_context *event_ctx)
 196 {
 197         int name_type = NBT_NAME_SERVER;
 198         const char *address;
 199         NTSTATUS status;
 200         struct nbt_name nbt_name;
 201         char *name, *p;
 202         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 203         struct smbcli_socket *result;
 204
 205         if (tmp_ctx == NULL) {
 206                 DEBUG(0, ("talloc_new failed\n"));
 207                 return NULL;
 208         }
 209
 210         name = talloc_strdup(tmp_ctx, host);
 211         if (name == NULL) {
 212                 DEBUG(0, ("talloc_strdup failed\n"));
 213                 talloc_free(tmp_ctx);
 214                 return NULL;
 215         }
 216
 217         if (event_ctx == NULL) {
 218                 event_ctx = event_context_init(mem_ctx);
 219         }
 220
 221         if (event_ctx == NULL) {
 222                 DEBUG(0, ("event_context_init failed\n"));
 223                 talloc_free(tmp_ctx);
 224                 return NULL;
 225         }
 226
 227         /* allow hostnames of the form NAME#xx and do a netbios lookup */
 228         if ((p = strchr(name, '#'))) {
 229                 name_type = strtol(p+1, NULL, 16);
 230                 *p = 0;
 231         }
 232
 233         make_nbt_name(&nbt_name, host, name_type);
 234
 235         status = resolve_name(resolve_ctx, &nbt_name, tmp_ctx, &address, event_ctx);
 236         if (!NT_STATUS_IS_OK(status)) {
 237                 talloc_free(tmp_ctx);
 238                 return NULL;
 239         }
 240
 241         status = smbcli_sock_connect(mem_ctx, address, ports, name, resolve_ctx,
 242                                      event_ctx, &result);
 243
 244         if (!NT_STATUS_IS_OK(status)) {
 245                 DEBUG(9, ("smbcli_sock_connect failed: %s\n",
 246                           nt_errstr(status)));
 247                 talloc_free(tmp_ctx);
 248                 return NULL;
 249         }
 250
 251         talloc_free(tmp_ctx);
 252
 253         return result;
 254 }