diff options
author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2022-09-10 15:44:41 +0200 |
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committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2022-09-10 15:44:41 +0200 |
commit | a9ee361f27e0439530387765924574e5358c8a5c (patch) | |
tree | 3104aecc4d574f7d7bbb269223814586277b1797 /src/plugins/dbus/dbus.c | |
parent | 82ac6c87ce0b0af2fb8de25d70442fec406bb742 (diff) |
New upstream version 1.8.19upstream/1.8.19upstream
Diffstat (limited to 'src/plugins/dbus/dbus.c')
-rw-r--r-- | src/plugins/dbus/dbus.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/src/plugins/dbus/dbus.c b/src/plugins/dbus/dbus.c new file mode 100644 index 0000000..be72dcb --- /dev/null +++ b/src/plugins/dbus/dbus.c @@ -0,0 +1,241 @@ +/* + * 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, +}; + + |