source4/winbind/wb_cmd_list_groups.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Command backend for wbinfo -g
   5
   6    Copyright (C) Kai Blin 2009
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/composite/composite.h"
  24 #include "winbind/wb_server.h"
  25 #include "smbd/service_task.h"
  26
  27 struct cmd_list_groups_state {
  28         struct composite_context *ctx;
  29         struct wbsrv_service *service;
  30
  31         struct wbsrv_domain *domain;
  32         char *domain_name;
  33         uint32_t resume_index;
  34         char *result;
  35         uint32_t num_groups;
  36 };
  37
  38 static void cmd_list_groups_recv_domain(struct composite_context *ctx);
  39 static void cmd_list_groups_recv_group_list(struct composite_context *ctx);
  40
  41 struct composite_context *wb_cmd_list_groups_send(TALLOC_CTX *mem_ctx,
  42                 struct wbsrv_service *service, const char *domain_name)
  43 {
  44         struct composite_context *ctx, *result;
  45         struct cmd_list_groups_state *state;
  46
  47         DEBUG(5, ("wb_cmd_list_groups_send called\n"));
  48
  49         result = composite_create(mem_ctx, service->task->event_ctx);
  50         if (!result) return NULL;
  51
  52         state = talloc(result, struct cmd_list_groups_state);
  53         if (composite_nomem(state, result)) return result;
  54
  55         state->ctx = result;
  56         result->private_data = state;
  57         state->service = service;
  58         state->resume_index = 0;
  59         state->num_groups = 0;
  60         state->result = talloc_strdup(state, "");
  61         if (composite_nomem(state->result, state->ctx)) return result;
  62
  63         /*FIXME: We should look up the domain in the winbind request if it is
  64          * set, not just take the primary domain. However, I want to get the
  65          * libnet logic to work first. */
  66
  67         if (domain_name && *domain_name != '\0') {
  68                 state->domain_name = talloc_strdup(state, domain_name);
  69                 if (composite_nomem(state->domain_name, state->ctx))
  70                         return result;
  71         } else {
  72                 state->domain_name = NULL;
  73         }
  74
  75         ctx = wb_sid2domain_send(state, service, service->primary_sid);
  76         if (composite_nomem(ctx, state->ctx)) return result;
  77
  78         composite_continue(state->ctx, ctx, cmd_list_groups_recv_domain, state);
  79         return result;
  80 }
  81
  82 static void cmd_list_groups_recv_domain(struct composite_context *ctx)
  83 {
  84         struct cmd_list_groups_state *state = talloc_get_type(
  85                         ctx->async.private_data, struct cmd_list_groups_state);
  86         struct wbsrv_domain *domain;
  87         struct libnet_GroupList *group_list;
  88
  89         DEBUG(5, ("cmd_list_groups_recv_domain called\n"));
  90
  91         state->ctx->status = wb_sid2domain_recv(ctx, &domain);
  92         if (!composite_is_ok(state->ctx)) return;
  93
  94         /* we use this entry also for context purposes (libnet_GroupList) */
  95         state->domain = domain;
  96
  97         /* If this is non-null, we've looked up the domain given in the winbind
  98          * request, otherwise we'll just use the default name .*/
  99         if (state->domain_name == NULL) {
 100                 state->domain_name = talloc_strdup(state,
 101                                                    state->domain->libnet_ctx->samr.name);
 102                 if (composite_nomem(state->domain_name, state->ctx)) return;
 103         }
 104
 105         group_list = talloc(state, struct libnet_GroupList);
 106         if (composite_nomem(group_list, state->ctx)) return;
 107
 108         group_list->in.domain_name = state->domain_name;
 109
 110         /* Rafal suggested that 128 is a good number here. I don't like magic
 111          * numbers too much, but for now it'll have to do.
 112          */
 113         group_list->in.page_size = 128;
 114         group_list->in.resume_index = state->resume_index;
 115
 116         ctx = libnet_GroupList_send(state->domain->libnet_ctx, state,
 117                                     group_list, NULL);
 118
 119         composite_continue(state->ctx, ctx, cmd_list_groups_recv_group_list,
 120                            state);
 121 }
 122
 123 static void cmd_list_groups_recv_group_list(struct composite_context *ctx)
 124 {
 125         struct cmd_list_groups_state *state = talloc_get_type(
 126                         ctx->async.private_data, struct cmd_list_groups_state);
 127         struct libnet_GroupList *group_list;
 128         NTSTATUS status;
 129         int i;
 130
 131         DEBUG(5, ("cmd_list_groups_recv_group_list called\n"));
 132
 133         group_list = talloc(state, struct libnet_GroupList);
 134         if (composite_nomem(group_list, state->ctx)) return;
 135
 136         status = libnet_GroupList_recv(ctx, state, group_list);
 137
 138         /* If NTSTATUS is neither OK nor MORE_ENTRIES, something broke */
 139         if (!NT_STATUS_IS_OK(status) &&
 140             !NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES) &&
 141             !NT_STATUS_EQUAL(status, NT_STATUS_NO_MORE_ENTRIES)) {
 142                 composite_error(state->ctx, status);
 143                 return;
 144         }
 145
 146         for (i = 0; i < group_list->out.count; ++i) {
 147                 DEBUG(5, ("Appending group '%s'\n",
 148                           group_list->out.groups[i].groupname));
 149                 state->result = talloc_asprintf_append_buffer(state->result,
 150                                                               "%s,",
 151                                                               group_list->out.groups[i].groupname);
 152                 state->num_groups++;
 153         }
 154
 155         /* If the status is OK, we're finished, there's no more groups.
 156          * So we'll trim off the trailing ',' and are done.*/
 157         if (NT_STATUS_IS_OK(status)) {
 158                 size_t str_len = strlen(state->result);
 159                 DEBUG(5, ("list_GroupList_recv returned NT_STATUS_OK\n"));
 160                 if (str_len > 0) {
 161                         state->result[str_len - 1] = '\0';
 162                 }
 163                 composite_done(state->ctx);
 164                 return;
 165         }
 166
 167         DEBUG(5, ("list_GroupList_recv returned NT_STATUS_MORE_ENTRIES\n"));
 168
 169         /* Otherwise there's more groups to get, so call out to libnet and
 170          * continue on this function here. */
 171
 172         group_list->in.domain_name = state->domain_name;
 173         /* See comment above about the page size. 128 seems like a good default.
 174          */
 175         group_list->in.page_size = 128;
 176         group_list->in.resume_index = group_list->out.resume_index;
 177
 178         ctx = libnet_GroupList_send(state->domain->libnet_ctx, state,group_list,
 179                                     NULL);
 180
 181         composite_continue(state->ctx, ctx, cmd_list_groups_recv_group_list,
 182                            state);
 183 }
 184
 185 NTSTATUS wb_cmd_list_groups_recv(struct composite_context *ctx,
 186                 TALLOC_CTX *mem_ctx, uint32_t *extra_data_len,
 187                 char **extra_data, uint32_t *num_groups)
 188 {
 189         NTSTATUS status = composite_wait(ctx);
 190
 191         DEBUG(5, ("wb_cmd_list_groups_recv called\n"));
 192
 193         if (NT_STATUS_IS_OK(status)) {
 194                 struct cmd_list_groups_state *state = talloc_get_type(
 195                         ctx->private_data, struct cmd_list_groups_state);
 196
 197                 *extra_data_len = strlen(state->result);
 198                 *extra_data = talloc_steal(mem_ctx, state->result);
 199                 *num_groups = state->num_groups;
 200         }
 201
 202         talloc_free(ctx);
 203         return status;
 204 }
 205
 206