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                                                    int port,
  49                                                    const char *host_name,
  50                                                    struct event_context *event_ctx)
  51 {
  52         struct composite_context *result, *ctx;
  53         struct sock_connect_state *state;
  54
  55         result = talloc_zero(mem_ctx, struct composite_context);
  56         if (result == NULL) goto failed;
  57         result->state = COMPOSITE_STATE_IN_PROGRESS;
  58
  59         if (event_ctx != NULL) {
  60                 result->event_ctx = talloc_reference(result, event_ctx);
  61         } else {
  62                 result->event_ctx = event_context_init(result);
  63         }
  64
  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         if (port == 0) {
  76                 const char **ports = lp_smb_ports(global_loadparm);
  77                 int i;
  78
  79                 for (i=0;ports[i];i++) /* noop */ ;
  80                 if (i == 0) {
  81                         DEBUG(3, ("no smb ports defined\n"));
  82                         goto failed;
  83                 }
  84                 state->num_ports = i;
  85                 state->ports = talloc_array(state, uint16_t, i);
  86                 if (state->ports == NULL) goto failed;
  87                 for (i=0;ports[i];i++) {
  88                         state->ports[i] = atoi(ports[i]);
  89                 }
  90         } else {
  91                 state->ports = talloc_array(state, uint16_t, 1);
  92                 if (state->ports == NULL) goto failed;
  93                 state->num_ports = 1;
  94                 state->ports[0] = port;
  95         }
  96
  97         ctx = socket_connect_multi_send(state, host_addr,
  98                                         state->num_ports, state->ports,
  99                                         lp_name_resolve_order(global_loadparm),
 100                                         state->ctx->event_ctx);
 101         if (ctx == NULL) goto failed;
 102         ctx->async.fn = smbcli_sock_connect_recv_conn;
 103         ctx->async.private_data = state;
 104         return result;
 105
 106 failed:
 107         talloc_free(result);
 108         return NULL;
 109 }
 110
 111 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
 112 {
 113         struct sock_connect_state *state =
 114                 talloc_get_type(ctx->async.private_data,
 115                                 struct sock_connect_state);
 116         struct socket_context *sock;
 117         uint16_t port;
 118
 119         state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
 120                                                        &port);
 121         if (!composite_is_ok(state->ctx)) return;
 122
 123         state->ctx->status =
 124                 socket_set_option(sock, lp_socket_options(global_loadparm), NULL);
 125         if (!composite_is_ok(state->ctx)) return;
 126
 127
 128         state->result = talloc_zero(state, struct smbcli_socket);
 129         if (composite_nomem(state->result, state->ctx)) return;
 130
 131         state->result->sock = talloc_steal(state->result, sock);
 132         state->result->port = port;
 133         state->result->hostname = talloc_steal(sock, state->host_name);
 134
 135         state->result->event.ctx =
 136                 talloc_reference(state->result, state->ctx->event_ctx);
 137         if (composite_nomem(state->result->event.ctx, state->ctx)) return;
 138
 139         composite_done(state->ctx);
 140 }
 141
 142 /*
 143   finish a smbcli_sock_connect_send() operation
 144 */
 145 NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
 146                                   TALLOC_CTX *mem_ctx,
 147                                   struct smbcli_socket **result)
 148 {
 149         NTSTATUS status = composite_wait(c);
 150         if (NT_STATUS_IS_OK(status)) {
 151                 struct sock_connect_state *state =
 152                         talloc_get_type(c->private_data,
 153                                         struct sock_connect_state);
 154                 *result = talloc_steal(mem_ctx, state->result);
 155         }
 156         talloc_free(c);
 157         return status;
 158 }
 159
 160 /*
 161   connect a smbcli_socket context to an IP/port pair
 162   if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
 163
 164   sync version of the function
 165 */
 166 NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
 167                              const char *host_addr, int port,
 168                              const char *host_name,
 169                              struct event_context *event_ctx,
 170                              struct smbcli_socket **result)
 171 {
 172         struct composite_context *c =
 173                 smbcli_sock_connect_send(mem_ctx, host_addr, port, host_name,
 174                                          event_ctx);
 175         return smbcli_sock_connect_recv(c, mem_ctx, result);
 176 }
 177
 178
 179 /****************************************************************************
 180  mark the socket as dead
 181 ****************************************************************************/
 182 void smbcli_sock_dead(struct smbcli_socket *sock)
 183 {
 184         talloc_free(sock->event.fde);
 185         sock->event.fde = NULL;
 186         talloc_free(sock->sock);
 187         sock->sock = NULL;
 188 }
 189
 190 /****************************************************************************
 191  Set socket options on a open connection.
 192 ****************************************************************************/
 193 void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
 194 {
 195         socket_set_option(sock->sock, options, NULL);
 196 }
 197
 198 /****************************************************************************
 199 resolve a hostname and connect
 200 ****************************************************************************/
 201 struct smbcli_socket *smbcli_sock_connect_byname(const char *host, int port,
 202                                                  TALLOC_CTX *mem_ctx,
 203                                                  const char **name_resolve_order,
 204                                                  struct event_context *event_ctx)
 205 {
 206         int name_type = NBT_NAME_SERVER;
 207         const char *address;
 208         NTSTATUS status;
 209         struct nbt_name nbt_name;
 210         char *name, *p;
 211         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 212         struct smbcli_socket *result;
 213
 214         if (tmp_ctx == NULL) {
 215                 DEBUG(0, ("talloc_new failed\n"));
 216                 return NULL;
 217         }
 218
 219         name = talloc_strdup(tmp_ctx, host);
 220         if (name == NULL) {
 221                 DEBUG(0, ("talloc_strdup failed\n"));
 222                 talloc_free(tmp_ctx);
 223                 return NULL;
 224         }
 225
 226         if (event_ctx == NULL) {
 227                 event_ctx = event_context_init(mem_ctx);
 228         }
 229
 230         if (event_ctx == NULL) {
 231                 DEBUG(0, ("event_context_init failed\n"));
 232                 talloc_free(tmp_ctx);
 233                 return NULL;
 234         }
 235
 236         /* allow hostnames of the form NAME#xx and do a netbios lookup */
 237         if ((p = strchr(name, '#'))) {
 238                 name_type = strtol(p+1, NULL, 16);
 239                 *p = 0;
 240         }
 241
 242         make_nbt_name(&nbt_name, host, name_type);
 243
 244         status = resolve_name(&nbt_name, tmp_ctx, &address, event_ctx, name_resolve_order);
 245         if (!NT_STATUS_IS_OK(status)) {
 246                 talloc_free(tmp_ctx);
 247                 return NULL;
 248         }
 249
 250         status = smbcli_sock_connect(mem_ctx, address, port, name, event_ctx,
 251                                      &result);
 252
 253         if (!NT_STATUS_IS_OK(status)) {
 254                 DEBUG(9, ("smbcli_sock_connect failed: %s\n",
 255                           nt_errstr(status)));
 256                 talloc_free(tmp_ctx);
 257                 return NULL;
 258         }
 259
 260         talloc_free(tmp_ctx);
 261
 262         return result;
 263 }