winbindd: Do not use group_list->out.resume_index after free
[samba.git] / source4 / winbind / wb_cmd_setpwent.c
1 /*
2    Unix SMB/CIFS implementation.
3
4    Command backend for setpwent
5
6    Copyright (C) Kai Blin 2007
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_setpwent_state {
28         struct composite_context *ctx;
29         struct wbsrv_service *service;
30         struct libnet_context *libnet_ctx;
31
32         struct wbsrv_pwent *result;
33         char *domain_name;
34 };
35
36 static void cmd_setpwent_recv_domain(struct composite_context *ctx);
37 static void cmd_setpwent_recv_user_list(struct composite_context *ctx);
38
39 struct composite_context *wb_cmd_setpwent_send(TALLOC_CTX *mem_ctx,
40                 struct wbsrv_service *service)
41 {
42         struct composite_context *ctx, *result;
43         struct cmd_setpwent_state *state;
44
45         DEBUG(5, ("wb_cmd_setpwent_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_setpwent_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_pwent);
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_setpwent_recv_domain, state);
64         return result;
65 }
66
67 static void cmd_setpwent_recv_domain(struct composite_context *ctx)
68 {
69         struct cmd_setpwent_state *state = talloc_get_type(
70                         ctx->async.private_data, struct cmd_setpwent_state);
71         struct wbsrv_domain *domain;
72         struct libnet_UserList *user_list;
73
74         DEBUG(5, ("cmd_setpwent_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         user_list = talloc(state->result, struct libnet_UserList);
82         if (composite_nomem(user_list, state->ctx)) return;
83
84         state->domain_name = talloc_strdup(state,
85                         domain->libnet_ctx->samr.name);
86         user_list->in.domain_name = talloc_strdup(state,
87                         domain->libnet_ctx->samr.name);
88         if (composite_nomem(user_list->in.domain_name, state->ctx)) return;
89
90         /* Page size recommended by Rafal */
91         user_list->in.page_size = 128;
92
93         /* Always get the start of the list */
94         user_list->in.resume_index = 0;
95
96         ctx = libnet_UserList_send(domain->libnet_ctx, state->result, user_list,
97                         NULL);
98
99         state->result->page_index = -1;
100         composite_continue(state->ctx, ctx, cmd_setpwent_recv_user_list, state);
101 }
102
103 static void cmd_setpwent_recv_user_list(struct composite_context *ctx)
104 {
105         struct cmd_setpwent_state *state = talloc_get_type(
106                         ctx->async.private_data, struct cmd_setpwent_state);
107         struct libnet_UserList *user_list;
108         struct libnet_UserList *user_list_send;
109         DEBUG(5, ("cmd_setpwent_recv_user_list called\n"));
110
111         user_list = talloc(state->result, struct libnet_UserList);
112         if (composite_nomem(user_list, state->ctx)) return;
113
114         state->ctx->status = libnet_UserList_recv(ctx, state->result,
115                                                   user_list);
116         if (NT_STATUS_IS_OK(state->ctx->status) ||
117                 NT_STATUS_EQUAL(state->ctx->status, STATUS_MORE_ENTRIES)) {
118
119                 uint32_t resume_index = user_list->out.resume_index;
120
121                 if (state->result->page_index == -1) { /* First run*/
122                         state->result->user_list = user_list;
123                         state->result->page_index = 0;
124                         state->result->libnet_ctx = state->libnet_ctx;
125                 } else {
126                         int i, cnt = state->result->user_list->out.count
127                                                         + user_list->out.count;
128                         struct userlist *tmp;
129                         tmp = state->result->user_list->out.users;
130                         state->result->user_list->out.users = talloc_realloc(state->result,
131                                                                              tmp, struct userlist,
132                                                                              cnt);
133                         tmp = state->result->user_list->out.users;
134                         for(i=0;i<user_list->out.count;i++ ) {
135                                 tmp[state->result->user_list->out.count + i].username
136                                         = talloc_strdup(state->result, user_list->out.users[i].username);
137                         }
138                         state->result->user_list->out.count = cnt;
139                         TALLOC_FREE(user_list);
140                 }
141
142                 if (NT_STATUS_IS_OK(state->ctx->status) ) {
143                         composite_done(state->ctx);
144                 } else {
145                         user_list_send = talloc(state->result, struct libnet_UserList);
146                         if (composite_nomem(user_list_send, state->ctx)) return;
147                         user_list_send->in.domain_name =  talloc_strdup(state, state->domain_name);
148                         user_list_send->in.resume_index = resume_index;
149                         user_list_send->in.page_size = 128;
150                         ctx = libnet_UserList_send(state->libnet_ctx, state->result, user_list_send, NULL);
151                         composite_continue(state->ctx, ctx, cmd_setpwent_recv_user_list, state);
152                 }
153         } else {
154                 composite_error(state->ctx, state->ctx->status);
155         }
156         return;
157 }
158
159 NTSTATUS wb_cmd_setpwent_recv(struct composite_context *ctx,
160                 TALLOC_CTX *mem_ctx, struct wbsrv_pwent **pwent)
161 {
162         NTSTATUS status = composite_wait(ctx);
163
164         DEBUG(5, ("wb_cmd_setpwent_recv called\n"));
165
166         if (NT_STATUS_IS_OK(status)) {
167                 struct cmd_setpwent_state *state =
168                         talloc_get_type(ctx->private_data,
169                                 struct cmd_setpwent_state);
170
171                 *pwent = talloc_steal(mem_ctx, state->result);
172         }
173
174         talloc_free(ctx);
175         return status;
176 }
177