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