winbindd: Do not use group_list->out.resume_index after free
[samba.git] / source4 / winbind / wb_cmd_setgrent.c
1 /*
2    Unix SMB/CIFS implementation.
3
4    Command backend for setgrent
5
6    Copyright (C) Matthieu Patou 2010
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_setgrent_state {
28         struct composite_context *ctx;
29         struct wbsrv_service *service;
30         struct libnet_context *libnet_ctx;
31
32         struct wbsrv_grent *result;
33         char *domain_name;
34 };
35
36 static void cmd_setgrent_recv_domain(struct composite_context *ctx);
37 static void cmd_setgrent_recv_group_list(struct composite_context *ctx);
38
39 struct composite_context *wb_cmd_setgrent_send(TALLOC_CTX *mem_ctx,
40                 struct wbsrv_service *service)
41 {
42         struct composite_context *ctx, *result;
43         struct cmd_setgrent_state *state;
44
45         DEBUG(5, ("wb_cmd_setgrent_send called\n"));
46
47         result = composite_create(mem_ctx, service->task->event_ctx);
48         if (!result) return NULL;
49
50         state = talloc(mem_ctx, struct cmd_setgrent_state);
51         if (composite_nomem(state, result)) return result;
52
53         state->ctx = result;
54         result->private_data = state;
55         state->service = service;
56
57         state->result = talloc(state, struct wbsrv_grent);
58         if (composite_nomem(state->result, state->ctx)) return result;
59
60         ctx = wb_sid2domain_send(state, service, service->primary_sid);
61         if (composite_nomem(ctx, state->ctx)) return result;
62
63         composite_continue(state->ctx, ctx, cmd_setgrent_recv_domain, state);
64         return result;
65 }
66
67 static void cmd_setgrent_recv_domain(struct composite_context *ctx)
68 {
69         struct cmd_setgrent_state *state = talloc_get_type(
70                         ctx->async.private_data, struct cmd_setgrent_state);
71         struct wbsrv_domain *domain;
72         struct libnet_GroupList *group_list;
73
74         DEBUG(5, ("cmd_setgrent_recv_domain called\n"));
75
76         state->ctx->status = wb_sid2domain_recv(ctx, &domain);
77         if (!composite_is_ok(state->ctx)) return;
78
79         state->libnet_ctx = domain->libnet_ctx;
80
81         group_list = talloc(state->result, struct libnet_GroupList);
82         if (composite_nomem(group_list, state->ctx)) return;
83
84         state->domain_name = talloc_strdup(state,
85                         domain->libnet_ctx->samr.name);
86         group_list->in.domain_name = talloc_strdup(state,
87                         domain->libnet_ctx->samr.name);
88         if (composite_nomem(group_list->in.domain_name, state->ctx)) return;
89
90         /* Page size recommended by Rafal */
91         group_list->in.page_size = 128;
92
93         /* Always get the start of the list */
94         group_list->in.resume_index = 0;
95
96         ctx = libnet_GroupList_send(domain->libnet_ctx, state->result, group_list,
97                         NULL);
98
99         state->result->page_index = -1;
100         composite_continue(state->ctx, ctx, cmd_setgrent_recv_group_list, state);
101 }
102
103 static void cmd_setgrent_recv_group_list(struct composite_context *ctx)
104 {
105         struct cmd_setgrent_state *state = talloc_get_type(
106                         ctx->async.private_data, struct cmd_setgrent_state);
107         struct libnet_GroupList *group_list;
108         struct libnet_GroupList *group_list_send;
109         DEBUG(5, ("cmd_setgrent_recv_group_list called\n"));
110
111         group_list = talloc(state->result, struct libnet_GroupList);
112         if (composite_nomem(group_list, state->ctx)) return;
113
114         state->ctx->status = libnet_GroupList_recv(ctx, state->result,
115                         group_list);
116         if (NT_STATUS_IS_OK(state->ctx->status) ||
117                 NT_STATUS_EQUAL(state->ctx->status, STATUS_MORE_ENTRIES)) {
118                 uint32_t resume_index = group_list->out.resume_index;
119                 if( state->result->page_index == -1) { /* First run*/
120                         state->result->group_list = group_list;
121                         state->result->page_index = 0;
122                         state->result->libnet_ctx = state->libnet_ctx;
123                 } else {
124                         int i;
125                         struct grouplist *tmp;
126                         tmp = state->result->group_list->out.groups;
127                         state->result->group_list->out.groups = talloc_realloc(state->result,tmp,struct grouplist,
128                         state->result->group_list->out.count+group_list->out.count);
129                         tmp = state->result->group_list->out.groups;
130                         for(i=0;i<group_list->out.count;i++ ) {
131                                 tmp[i+state->result->group_list->out.count].groupname = talloc_steal(state->result,group_list->out.groups[i].groupname);
132                         }
133                         state->result->group_list->out.count += group_list->out.count;
134                         TALLOC_FREE(group_list);
135                 }
136
137
138                 if (NT_STATUS_IS_OK(state->ctx->status) ) {
139                         composite_done(state->ctx);
140                 } else {
141                         group_list_send = talloc(state->result, struct libnet_GroupList);
142                         if (composite_nomem(group_list_send, state->ctx)) return;
143                         group_list_send->in.domain_name =  talloc_strdup(state, state->domain_name);
144                         group_list_send->in.resume_index = resume_index;
145                         group_list_send->in.page_size = 128;
146                         ctx = libnet_GroupList_send(state->libnet_ctx, state->result, group_list_send, NULL);
147                         composite_continue(state->ctx, ctx, cmd_setgrent_recv_group_list, state);
148                 }
149         } else {
150                 composite_error(state->ctx, state->ctx->status);
151         }
152         return;
153 }
154
155 NTSTATUS wb_cmd_setgrent_recv(struct composite_context *ctx,
156                 TALLOC_CTX *mem_ctx, struct wbsrv_grent **grent)
157 {
158         NTSTATUS status = composite_wait(ctx);
159
160         DEBUG(5, ("wb_cmd_setgrent_recv called\n"));
161
162         if (NT_STATUS_IS_OK(status)) {
163                 struct cmd_setgrent_state *state =
164                         talloc_get_type(ctx->private_data,
165                                 struct cmd_setgrent_state);
166
167                 *grent = talloc_steal(mem_ctx, state->result);
168         }
169
170         talloc_free(ctx);
171         return status;
172 }