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
|
/*
* Copyright (c) 2015 IBM Corporation
* Copyright (c) 2019 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdbool.h>
#include <systemd/sd-bus.h>
#include <ipmitool/log.h>
#include <ipmitool/ipmi.h>
#include <ipmitool/ipmi_intf.h>
static sd_bus *bus;
static
struct ipmi_rs *
ipmi_dbus_sendrecv(struct ipmi_intf *intf,
struct ipmi_rq *req)
{
static const char *destination = "xyz.openbmc_project.Ipmi.Host";
static const char *object_path = "/xyz/openbmc_project/Ipmi";
static const char *interface = "xyz.openbmc_project.Ipmi.Server";
static const char *method_name = "execute";
static const char SD_BUS_TYPE_3_BYTES[] = {
SD_BUS_TYPE_BYTE, SD_BUS_TYPE_BYTE, SD_BUS_TYPE_BYTE, 0
};
static const char SD_BUS_TYPE_4_BYTES[] = {
SD_BUS_TYPE_BYTE, SD_BUS_TYPE_BYTE,
SD_BUS_TYPE_BYTE, SD_BUS_TYPE_BYTE, 0
};
static const char SD_BUS_TYPE_DICT_OF_VARIANTS[] = {
SD_BUS_TYPE_ARRAY,
SD_BUS_TYPE_DICT_ENTRY_BEGIN,
SD_BUS_TYPE_STRING, SD_BUS_TYPE_VARIANT,
SD_BUS_TYPE_DICT_ENTRY_END, 0
};
static const char SD_BUS_TYPE_IPMI_RESPONSE[] = {
SD_BUS_TYPE_BYTE, SD_BUS_TYPE_BYTE,
SD_BUS_TYPE_BYTE, SD_BUS_TYPE_BYTE,
SD_BUS_TYPE_ARRAY, SD_BUS_TYPE_BYTE, 0
};
sd_bus_message *request = NULL;
int rc;
sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus_message* reply = NULL;
uint8_t recv_netfn;
uint8_t recv_lun;
uint8_t recv_cmd;
uint8_t recv_cc;
const void *data;
size_t data_len;
static struct ipmi_rs rsp;
struct ipmi_rs *ipmi_response = NULL;
if (!intf->opened || !bus)
{
goto out_no_free;
}
rsp.ccode = IPMI_CC_UNSPECIFIED_ERROR;
rsp.data_len = 0;
memset(rsp.data, 0, sizeof(rsp.data));
/* The D-Bus xyz.openbmc_project.Ipmi.Server.execute interface
* looks like this:
*
* Request:
* byte: net function
* byte: lun
* byte: command
* byte array: data (possibly zero length)
* array of (string,variant): options
* Response:
* byte: net function
* byte: lun
* byte: command
* byte: completion code
* byte array: response data (possibly zero length)
*/
rc = sd_bus_message_new_method_call(bus, &request, destination,
object_path, interface,
method_name);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to create message: %s\n",
__func__, strerror(-rc));
goto out_no_free;
}
/* pack the header: netfn, lun, cmd */
rc = sd_bus_message_append(request, SD_BUS_TYPE_3_BYTES, req->msg.netfn,
req->msg.lun, req->msg.cmd);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to append parameters\n", __func__);
goto out_free_request;
}
/* pack the variable length data */
rc = sd_bus_message_append_array(request, SD_BUS_TYPE_BYTE,
req->msg.data, req->msg.data_len);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to append body\n", __func__);
goto out_free_request;
}
/* Options are only needed for session-based channels, but
* in order to fulfill the correct signature, an empty array
* must be packed */
rc = sd_bus_message_append(request, SD_BUS_TYPE_DICT_OF_VARIANTS,
NULL, 0);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to append options\n", __func__);
goto out_free_request;
}
rc = sd_bus_call(bus, request, 0, &error, &reply);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to send dbus message (%s)\n",
__func__, error.message);
goto out_free_request;
}
/* unpack the response; check that it has the expected types */
rc = sd_bus_message_enter_container(reply, SD_BUS_TYPE_STRUCT,
SD_BUS_TYPE_IPMI_RESPONSE);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to parse reply\n", __func__);
goto out_free_reply;
}
/* read the header: CC netfn lun cmd */
rc = sd_bus_message_read(reply, SD_BUS_TYPE_4_BYTES, &recv_netfn,
&recv_lun, &recv_cmd, &recv_cc);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to read reply\n", __func__);
goto out_free_reply;
}
/* read the variable length data */
rc = sd_bus_message_read_array(reply, SD_BUS_TYPE_BYTE,
&data, &data_len);
if (rc < 0) {
lprintf(LOG_ERR, "%s: failed to read reply data\n", __func__);
goto out_free_reply;
}
rc = sd_bus_message_exit_container(reply);
if (rc < 0) {
lprintf(LOG_ERR, "%s: final unpack of message failed\n",
__func__);
goto out_free_reply;
}
if (data_len > sizeof(rsp.data)) {
lprintf(LOG_ERR, "%s: data too long!\n", __func__);
goto out_free_reply;
}
/* At this point, all the parts are available for a response
* other than unspecified error. */
rsp.ccode = recv_cc;
rsp.data_len = data_len;
memcpy(rsp.data, data, data_len);
ipmi_response = &rsp;
out_free_reply:
/* message unref will free resources owned by the message */
sd_bus_message_unref(reply);
out_free_request:
sd_bus_message_unref(request);
out_no_free:
return ipmi_response;
}
static
int
ipmi_dbus_setup(struct ipmi_intf *intf)
{
int rc;
rc = sd_bus_default_system(&bus);
if (rc < 0) {
lprintf(LOG_ERR, "Can't connect to session bus: %s\n",
strerror(-rc));
return -1;
}
intf->opened = 1;
return 0;
}
static
void
ipmi_dbus_close(struct ipmi_intf *intf)
{
if (intf->opened)
{
sd_bus_close(bus);
}
intf->opened = 0;
}
struct ipmi_intf ipmi_dbus_intf = {
.name = "dbus",
.desc = "OpenBMC D-Bus interface",
.setup = ipmi_dbus_setup,
.close = ipmi_dbus_close,
.sendrecv = ipmi_dbus_sendrecv,
};
|
