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 event_context *event_ctx)
  51 {
  52         struct composite_context *result, *ctx;
  53         struct sock_connect_state *state;
  54         int i;
  55
  56         result = talloc_zero(mem_ctx, struct composite_context);
  57         if (result == NULL) goto failed;
  58         result->state = COMPOSITE_STATE_IN_PROGRESS;
  59
  60         if (event_ctx != NULL) {
  61                 result->event_ctx = talloc_reference(result, event_ctx);
  62         } else {
  63                 result->event_ctx = event_context_init(result);
  64         }
  65
  66         if (result->event_ctx == NULL) goto failed;
  67
  68         state = talloc(result, struct sock_connect_state);
  69         if (state == NULL) goto failed;
  70         state->ctx = result;
  71         result->private_data = state;
  72
  73         state->host_name = talloc_strdup(state, host_name);
  74         if (state->host_name == NULL) goto failed;
  75
  76         state->num_ports = str_list_length(ports);
  77         state->ports = talloc_array(state, uint16_t, state->num_ports);
  78         if (state->ports == NULL) goto failed;
  79         for (i=0;ports[i];i++) {
  80                 state->ports[i] = atoi(ports[i]);
  81         }
  82
  83         ctx = socket_connect_multi_send(state, host_addr,
  84                                         state->num_ports, state->ports,
  85                                         lp_resolve_context(global_loadparm),
  86                                         state->ctx->event_ctx);
  87         if (ctx == NULL) goto failed;
  88         ctx->async.fn = smbcli_sock_connect_recv_conn;
  89         ctx->async.private_data = state;
  90         return result;
  91
  92 failed:
  93         talloc_free(result);
  94         return NULL;
  95 }
  96
  97 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
  98 {
  99         struct sock_connect_state *state =
 100                 talloc_get_type(ctx->async.private_data,
 101                                 struct sock_connect_state);
 102         struct socket_context *sock;
 103         uint16_t port;
 104
 105         state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
 106                                                        &port);
 107         if (!composite_is_ok(state->ctx)) return;
 108
 109         state->ctx->status =
 110                 socket_set_option(sock, lp_socket_options(global_loadparm), NULL);
 111         if (!composite_is_ok(state->ctx)) return;
 112
 113
 114         state->result = talloc_zero(state, struct smbcli_socket);
 115         if (composite_nomem(state->result, state->ctx)) return;
 116
 117         state->result->sock = talloc_steal(state->result, sock);
 118         state->result->port = port;
 119         state->result->hostname = talloc_steal(sock, state->host_name);
 120
 121         state->result->event.ctx =
 122                 talloc_reference(state->result, state->ctx->event_ctx);
 123         if (composite_nomem(state->result->event.ctx, state->ctx)) return;
 124
 125         composite_done(state->ctx);
 126 }
 127
 128 /*
 129   finish a smbcli_sock_connect_send() operation
 130 */
 131 NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
 132                                   TALLOC_CTX *mem_ctx,
 133                                   struct smbcli_socket **result)
 134 {
 135         NTSTATUS status = composite_wait(c);
 136         if (NT_STATUS_IS_OK(status)) {
 137                 struct sock_connect_state *state =
 138                         talloc_get_type(c->private_data,
 139                                         struct sock_connect_state);
 140                 *result = talloc_steal(mem_ctx, state->result);
 141         }
 142         talloc_free(c);
 143         return status;
 144 }
 145
 146 /*
 147   connect a smbcli_socket context to an IP/port pair
 148   if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
 149
 150   sync version of the function
 151 */
 152 NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
 153                              const char *host_addr, const char **ports,
 154                              const char *host_name,
 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                                          event_ctx);
 161         return smbcli_sock_connect_recv(c, mem_ctx, result);
 162 }
 163
 164
 165 /****************************************************************************
 166  mark the socket as dead
 167 ****************************************************************************/
 168 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 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 (tmp_ctx == NULL) {
 201                 DEBUG(0, ("talloc_new failed\n"));
 202                 return NULL;
 203         }
 204
 205         name = talloc_strdup(tmp_ctx, host);
 206         if (name == NULL) {
 207                 DEBUG(0, ("talloc_strdup failed\n"));
 208                 talloc_free(tmp_ctx);
 209                 return NULL;
 210         }
 211
 212         if (event_ctx == NULL) {
 213                 event_ctx = event_context_init(mem_ctx);
 214         }
 215
 216         if (event_ctx == NULL) {
 217                 DEBUG(0, ("event_context_init failed\n"));
 218                 talloc_free(tmp_ctx);
 219                 return NULL;
 220         }
 221
 222         /* allow hostnames of the form NAME#xx and do a netbios lookup */
 223         if ((p = strchr(name, '#'))) {
 224                 name_type = strtol(p+1, NULL, 16);
 225                 *p = 0;
 226         }
 227
 228         make_nbt_name(&nbt_name, host, name_type);
 229
 230         status = resolve_name(resolve_ctx, &nbt_name, tmp_ctx, &address, event_ctx);
 231         if (!NT_STATUS_IS_OK(status)) {
 232                 talloc_free(tmp_ctx);
 233                 return NULL;
 234         }
 235
 236         status = smbcli_sock_connect(mem_ctx, address, ports, name, event_ctx,
 237                                      &result);
 238
 239         if (!NT_STATUS_IS_OK(status)) {
 240                 DEBUG(9, ("smbcli_sock_connect failed: %s\n",
 241                           nt_errstr(status)));
 242                 talloc_free(tmp_ctx);
 243                 return NULL;
 244         }
 245
 246         talloc_free(tmp_ctx);
 247
 248         return result;
 249 }