summaryrefslogtreecommitdiff
path: root/src/monitor/monitor_sbus.c
blob: 632de496f5da06da9218b5b03006b3255a1a7f88 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
/*
   SSSD

   Data Provider Helpers

   Copyright (C) Stephen Gallagher <sgallagh@redhat.com>	2009

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/* Needed for res_init() */
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>

#include "util/util.h"
#include "confdb/confdb.h"
#include "sbus/sssd_dbus.h"
#include "sbus/sbus_client.h"
#include "monitor/monitor_interfaces.h"

int monitor_get_sbus_address(TALLOC_CTX *mem_ctx, char **address)
{
    char *default_address;

    *address = NULL;
    default_address = talloc_asprintf(mem_ctx, "unix:path=%s/%s",
                                      PIPE_PATH, SSSD_SERVICE_PIPE);
    if (default_address == NULL) {
        return ENOMEM;
    }

    *address = default_address;
    return EOK;
}

static void id_callback(DBusPendingCall *pending, void *ptr)
{
    DBusMessage *reply;
    DBusError dbus_error;
    dbus_bool_t ret;
    dbus_uint16_t mon_ver;
    int type;

    dbus_error_init(&dbus_error);

    reply = dbus_pending_call_steal_reply(pending);
    if (!reply) {
        /* reply should never be null. This function shouldn't be called
         * until reply is valid or timeout has occurred. If reply is NULL
         * here, something is seriously wrong and we should bail out.
         */
        DEBUG(0, ("Severe error. A reply callback was called but no"
                  " reply was received and no timeout occurred\n"));

        /* FIXME: Destroy this connection ? */
        goto done;
    }

    type = dbus_message_get_type(reply);
    switch (type) {
    case DBUS_MESSAGE_TYPE_METHOD_RETURN:
        ret = dbus_message_get_args(reply, &dbus_error,
                                    DBUS_TYPE_UINT16, &mon_ver,
                                    DBUS_TYPE_INVALID);
        if (!ret) {
            DEBUG(1, ("Failed to parse message\n"));
            if (dbus_error_is_set(&dbus_error)) dbus_error_free(&dbus_error);
            /* FIXME: Destroy this connection ? */
            goto done;
        }

        DEBUG(4, ("Got id ack and version (%d) from Monitor\n", mon_ver));

        break;

    case DBUS_MESSAGE_TYPE_ERROR:
        DEBUG(0,("The Monitor returned an error [%s]\n",
                 dbus_message_get_error_name(reply)));
        /* Falling through to default intentionally*/
    default:
        /*
         * Timeout or other error occurred or something
         * unexpected happened.
         * It doesn't matter which, because either way we
         * know that this connection isn't trustworthy.
         * We'll destroy it now.
         */

        /* FIXME: Destroy this connection ? */
        break;
    }

done:
    dbus_pending_call_unref(pending);
    dbus_message_unref(reply);
}

int monitor_common_send_id(struct sbus_connection *conn,
                           const char *name, uint16_t version)
{
    DBusMessage *msg;
    dbus_bool_t ret;
    int retval;

    /* create the message */
    msg = dbus_message_new_method_call(NULL,
                                       MON_SRV_PATH,
                                       MON_SRV_INTERFACE,
                                       MON_SRV_METHOD_REGISTER);
    if (msg == NULL) {
        DEBUG(0, ("Out of memory?!\n"));
        return ENOMEM;
    }

    DEBUG(4, ("Sending ID: (%s,%d)\n", name, version));

    ret = dbus_message_append_args(msg,
                                   DBUS_TYPE_STRING, &name,
                                   DBUS_TYPE_UINT16, &version,
                                   DBUS_TYPE_INVALID);
    if (!ret) {
        DEBUG(1, ("Failed to build message\n"));
        return EIO;
    }

    retval = sbus_conn_send(conn, msg, 3000,
                            id_callback,
                            NULL, NULL);
    dbus_message_unref(msg);
    return retval;
}

int monitor_common_pong(DBusMessage *message,
                        struct sbus_connection *conn)
{
    DBusMessage *reply;
    dbus_bool_t ret;

    reply = dbus_message_new_method_return(message);
    if (!reply) return ENOMEM;

    ret = dbus_message_append_args(reply, DBUS_TYPE_INVALID);
    if (!ret) {
        dbus_message_unref(reply);
        return EIO;
    }

    /* send reply back */
    sbus_conn_send_reply(conn, reply);
    dbus_message_unref(reply);

    return EOK;
}

int monitor_common_res_init(DBusMessage *message,
                            struct sbus_connection *conn)
{
    int ret;

    ret = res_init();
    if(ret != 0) {
        return EIO;
    }

    /* Send an empty reply to acknowledge receipt */
    return monitor_common_pong(message, conn);
}

errno_t monitor_common_rotate_logs(struct confdb_ctx *confdb,
                                   const char *conf_path)
{
    errno_t ret;
    int old_debug_level = debug_level;

    ret = rotate_debug_files();
    if (ret) {
        sss_log(SSS_LOG_ALERT, "Could not rotate debug files! [%d][%s]\n",
                               ret, strerror(ret));
        return ret;
    }

    /* Get new debug level from the confdb */
    ret = confdb_get_int(confdb, NULL, conf_path,
                         CONFDB_SERVICE_DEBUG_LEVEL,
                         old_debug_level,
                         &debug_level);
    if (ret != EOK) {
        DEBUG(0, ("Error reading from confdb (%d) [%s]\n",
                  ret, strerror(ret)));
        /* Try to proceed with the old value */
        debug_level = old_debug_level;
    }

    if (debug_level != old_debug_level) {
        DEBUG(0, ("Debug level changed to %d\n", debug_level));
    }

    return EOK;
}

errno_t sss_monitor_init(TALLOC_CTX *mem_ctx,
                         struct tevent_context *ev,
                         struct sbus_interface *intf,
                         const char *svc_name,
                         uint16_t svc_version,
                         void *pvt,
                         struct sbus_connection **mon_conn)
{
    errno_t ret;
    char *sbus_address;
    struct sbus_connection *conn;

    /* Set up SBUS connection to the monitor */
    ret = monitor_get_sbus_address(NULL, &sbus_address);
    if (ret != EOK) {
        DEBUG(0, ("Could not locate monitor address.\n"));
        return ret;
    }

    ret = sbus_client_init(mem_ctx, ev, sbus_address,
                           intf, &conn,
                           NULL, pvt);
    if (ret != EOK) {
        DEBUG(0, ("Failed to connect to monitor services.\n"));
        talloc_free(sbus_address);
        return ret;
    }
    talloc_free(sbus_address);

    /* Identify ourselves to the monitor */
    ret = monitor_common_send_id(conn, svc_name, svc_version);
    if (ret != EOK) {
        DEBUG(0, ("Failed to identify to the monitor!\n"));
        return ret;
    }

    *mon_conn = conn;

    return EOK;
}