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