transporthandler.C - openbmc/phosphor-host-ipmid - Gitiles

 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
 #include <arpa/inet.h>

 #include "ipmid-api.h"
 #include "ipmid.H"
 #include "transporthandler.h"

 #define SYSTEMD_NETWORKD_DBUS 1

 #ifdef SYSTEMD_NETWORKD_DBUS
 #include <systemd/sd-bus.h>
 #endif

 // OpenBMC System Manager dbus framework
 const char  *app   =  "org.openbmc.NetworkManager";
 const char  *obj   =  "/org/openbmc/NetworkManager/Interface";
 const char  *ifc   =  "org.openbmc.NetworkManager";

 const int SIZE_MAC = 18; //xx:xx:xx:xx:xx:xx
 const int SIZE_LAN_PARM = 16; //xxx.xxx.xxx.xxx

 char cur_ipaddr  [16] = "";
 char cur_netmask [16] = "";
 char cur_gateway [16] = "";

 char new_ipaddr  [16] = "";
 char new_netmask [16] = "";
 char new_gateway [16] = "";

 void register_netfn_transport_functions() __attribute__((constructor));

 ipmi_ret_t ipmi_transport_wildcard(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     printf("Handling TRANSPORT WILDCARD Netfn:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
     // Status code.
     ipmi_ret_t rc = IPMI_CC_OK;
     *data_len = 0;
     return rc;
 }

 struct set_lan_t {
     uint8_t channel;
     uint8_t parameter;
     uint8_t data[8]; // Per IPMI spec, not expecting more than this size
 }  __attribute__ ((packed));

 ipmi_ret_t ipmi_transport_set_lan(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     ipmi_ret_t rc = IPMI_CC_OK;
     *data_len = 0;
     sd_bus *bus = ipmid_get_sd_bus_connection();
     sd_bus_message *reply = NULL, *m = NULL;
     sd_bus_error error = SD_BUS_ERROR_NULL;
     int r = 0;

     printf("IPMI SET_LAN\n");

     set_lan_t *reqptr = (set_lan_t*) request;

     // TODO Use dbus interface once available. For now use cmd line.
     // TODO Add the rest of the parameters like setting auth type
     // TODO Add error handling

     if (reqptr->parameter == LAN_PARM_IP)
     {
         snprintf(new_ipaddr, SIZE_LAN_PARM, "%d.%d.%d.%d",
             reqptr->data[0], reqptr->data[1], reqptr->data[2], reqptr->data[3]);
     }
     else if (reqptr->parameter == LAN_PARM_MAC)
     {
         char                mac[SIZE_MAC];

         snprintf(mac, SIZE_MAC, "%02x:%02x:%02x:%02x:%02x:%02x",
                 reqptr->data[0],
                 reqptr->data[1],
                 reqptr->data[2],
                 reqptr->data[3],
                 reqptr->data[4],
                 reqptr->data[5]);

         r = sd_bus_message_new_method_call(bus,&m,app,obj,ifc,"SetHwAddress");
         if (r < 0) {
             fprintf(stderr, "Failed to add method object: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_message_append(m, "s", mac);
         if (r < 0) {
             fprintf(stderr, "Failed to append message data: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_call(bus, m, 0, &error, &reply);
         if (r < 0) {
             fprintf(stderr, "Failed to call method: %s\n", strerror(-r));
             return -1;
         }
     }
     else if (reqptr->parameter == LAN_PARM_SUBNET)
     {
         snprintf(new_netmask, SIZE_LAN_PARM, "%d.%d.%d.%d",
             reqptr->data[0], reqptr->data[1], reqptr->data[2], reqptr->data[3]);
     }
     else if (reqptr->parameter == LAN_PARM_GATEWAY)
     {
         snprintf(new_gateway, SIZE_LAN_PARM, "%d.%d.%d.%d",
             reqptr->data[0], reqptr->data[1], reqptr->data[2], reqptr->data[3]);
     }
     else if (reqptr->parameter == LAN_PARM_INPROGRESS) // Apply config
     {
         int rc = 0;
         sd_bus_message *req = NULL;
         sd_bus_message *res = NULL;
         sd_bus *bus1        = NULL;
         sd_bus_error err    = SD_BUS_ERROR_NULL;

         if (!strcmp(new_ipaddr, "") || !strcmp (new_netmask, "") || !strcmp (new_gateway, ""))
         {
             fprintf(stderr,"ERROR: Incomplete LAN Parameters\n");
             return -1;
         }

         rc = sd_bus_open_system(&bus1);
         if(rc < 0)
         {
             fprintf(stderr,"ERROR: Getting a SYSTEM bus hook\n");
             return -1;
         }

         if (strcmp(cur_ipaddr, ""))
         {
             sd_bus_error_free(&err);
             sd_bus_message_unref(req);
             sd_bus_message_unref(res);

             rc = sd_bus_call_method(bus1,            // On the System Bus
                                     app,            // Service to contact
                                     obj,            // Object path
                                     ifc,            // Interface name
                                     "DelAddress4",  // Method to be called
                                     &err,           // object to return error
                                     &res,           // Response message on success
                                     "ssss",         // input message (dev,ip,nm,gw)
                                     "eth0",
                                     cur_ipaddr,
                                     cur_netmask,
                                     cur_gateway);
         }

         if(rc < 0)
         {
             fprintf(stderr, "Failed to remove existing IP %s: %s\n", cur_ipaddr, err.message);
             return -1;
         }

         sd_bus_error_free(&err);
         sd_bus_message_unref(req);
         sd_bus_message_unref(res);

         rc = sd_bus_call_method(bus1,            // On the System Bus
                                 app,            // Service to contact
                                 obj,            // Object path
                                 ifc,            // Interface name
                                 "AddAddress4",  // Method to be called
                                 &err,           // object to return error
                                 &res,           // Response message on success
                                 "ssss",         // input message (dev,ip,nm,gw)
                                 "eth0",
                                 new_ipaddr,
                                 new_netmask,
                                 new_gateway);
         if(rc < 0)
         {
             fprintf(stderr, "Failed to set IP %s: %s\n", new_ipaddr, err.message);
             return -1;
         }

         strcpy (cur_ipaddr, new_ipaddr);
         strcpy (cur_netmask, new_netmask);
         strcpy (cur_gateway, new_gateway);
     }
     else
     {
         fprintf(stderr, "Unsupported parameter 0x%x\n", reqptr->parameter);
         return IPMI_CC_PARM_NOT_SUPPORTED;
     }

     return rc;
 }

 struct get_lan_t {
     uint8_t rev_channel;
     uint8_t parameter;
     uint8_t parameter_set;
     uint8_t parameter_block;
 }  __attribute__ ((packed));

 ipmi_ret_t ipmi_transport_get_lan(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     ipmi_ret_t rc = IPMI_CC_OK;
     *data_len = 0;
     sd_bus *bus = ipmid_get_sd_bus_connection();
     sd_bus_message *reply = NULL, *m = NULL;
     sd_bus_error error = SD_BUS_ERROR_NULL;
     int r = 0;
     const uint8_t current_revision = 0x11; // Current rev per IPMI Spec 2.0

     int                 family;
     unsigned char       prefixlen;
     unsigned char       scope;
     unsigned int        flags;
     char               *saddr = NULL;
     int                 i = 0;

     printf("IPMI GET_LAN\n");

     get_lan_t *reqptr = (get_lan_t*) request;

     if (reqptr->rev_channel & 0x80) // Revision is bit 7
     {
         // Only current revision was requested
         *data_len = sizeof(current_revision);
         memcpy(response, &current_revision, *data_len);
         return IPMI_CC_OK;
     }

     // TODO Use dbus interface once available. For now use ip cmd.
     // TODO Add the rest of the parameters, like gateway

     if (reqptr->parameter == LAN_PARM_INPROGRESS)
     {
         uint8_t buf[] = {current_revision,0};
         *data_len = sizeof(buf);
         memcpy(response, &buf, *data_len);
         return IPMI_CC_OK;
     }
     else if (reqptr->parameter == LAN_PARM_AUTHSUPPORT)
     {
         uint8_t buf[] = {current_revision,0x04};
         *data_len = sizeof(buf);
         memcpy(response, &buf, *data_len);
         return IPMI_CC_OK;
     }
     else if (reqptr->parameter == LAN_PARM_AUTHENABLES)
     {
         uint8_t buf[] = {current_revision,0x04,0x04,0x04,0x04,0x04};
         *data_len = sizeof(buf);
         memcpy(response, &buf, *data_len);
         return IPMI_CC_OK;
     }
     else if (reqptr->parameter == LAN_PARM_IP)
     {
         const char*         device             = "eth0";
         uint8_t buf[5]; // Size of expected IPMI response msg

         r = sd_bus_message_new_method_call(bus,&m,app,obj,ifc,"GetAddress4");
         if (r < 0) {
             fprintf(stderr, "Failed to add method object: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_message_append(m, "s", device);
         if (r < 0) {
             fprintf(stderr, "Failed to append message data: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_call(bus, m, 0, &error, &reply);
         if (r < 0) {
             fprintf(stderr, "Failed to call method: %s\n", strerror(-r));
             return -1;
         }
         rc = sd_bus_message_enter_container (reply, 'a', "(iyyus)");
         if(rc < 0)
         {
             fprintf(stderr, "Failed to parse response message:[%s]\n", strerror(-rc));
             return -1;
         }
         rc = sd_bus_message_read(reply, "(iyyus)", &family, &prefixlen, &scope, &flags, &saddr);
         if (rc < 0)
         {
             fprintf(stderr, "Failed to receive response: %s\n", strerror(-r));
             return -1;
         }

         printf("%s:%d:%d:%d:%s\n", family==AF_INET?"IPv4":"IPv6", prefixlen, scope, flags, saddr);

         memcpy((void*)&buf[0], &current_revision, 1);

         // Parse IP address
         char *tokptr = NULL;
         char* digit = strtok_r(saddr, ".", &tokptr);
         if (digit == NULL)
         {
             fprintf(stderr, "Unexpected IP format: %s", saddr);
             return IPMI_CC_RESPONSE_ERROR;
         }
         i = 0;
         while (digit != NULL)
         {
             int resp_byte = strtoul(digit, NULL, 10);
             memcpy((void*)&buf[i+1], &resp_byte, 1);
             i++;
             digit = strtok_r(NULL, ".", &tokptr);
         }

         *data_len = sizeof(buf);
         memcpy(response, &buf, *data_len);

         return IPMI_CC_OK;
     }
     else if (reqptr->parameter == LAN_PARM_MAC)
     {
         //string to parse: link/ether xx:xx:xx:xx:xx:xx

         const char*         device             = "eth0";
         uint8_t             buf[7];
         char *eaddr1 = NULL;

         r = sd_bus_message_new_method_call(bus,&m,app,obj,ifc,"GetHwAddress");
         if (r < 0) {
             fprintf(stderr, "Failed to add method object: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_message_append(m, "s", device);
         if (r < 0) {
             fprintf(stderr, "Failed to append message data: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_call(bus, m, 0, &error, &reply);
         if (r < 0) {
             fprintf(stderr, "Failed to call method: %s\n", strerror(-r));
             return -1;
         }
         r = sd_bus_message_read(reply, "s", &eaddr1);
         if (r < 0) {
             fprintf(stderr, "Failed to get a response: %s", strerror(-r));
             return IPMI_CC_RESPONSE_ERROR;
         }
         if (eaddr1 == NULL)
         {
             fprintf(stderr, "Failed to get a valid response: %s", strerror(-r));
             return IPMI_CC_RESPONSE_ERROR;
         }

         memcpy((void*)&buf[0], &current_revision, 1);

         char *tokptr = NULL;
         char* digit = strtok_r(eaddr1, ":", &tokptr);
         if (digit == NULL)
         {
             fprintf(stderr, "Unexpected MAC format: %s", eaddr1);
             return IPMI_CC_RESPONSE_ERROR;
         }

         i=0;
         while (digit != NULL)
         {
             int resp_byte = strtoul(digit, NULL, 16);
             memcpy((void*)&buf[i+1], &resp_byte, 1);
             i++;
             digit = strtok_r(NULL, ":", &tokptr);
         }

         *data_len = sizeof(buf);
         memcpy(response, &buf, *data_len);

         return IPMI_CC_OK;
     }
     else
     {
         fprintf(stderr, "Unsupported parameter 0x%x\n", reqptr->parameter);
         return IPMI_CC_PARM_NOT_SUPPORTED;
     }

     return rc;
 }

 void register_netfn_transport_functions()
 {
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_TRANSPORT, IPMI_CMD_WILDCARD);
     ipmi_register_callback(NETFUN_TRANSPORT, IPMI_CMD_WILDCARD, NULL, ipmi_transport_wildcard);

     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_TRANSPORT, IPMI_CMD_SET_LAN);
     ipmi_register_callback(NETFUN_TRANSPORT, IPMI_CMD_SET_LAN, NULL, ipmi_transport_set_lan);

     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_TRANSPORT, IPMI_CMD_GET_LAN);
     ipmi_register_callback(NETFUN_TRANSPORT, IPMI_CMD_GET_LAN, NULL, ipmi_transport_get_lan);

     return;
 }
	#include <stdio.h>
	#include <string.h>
	#include <stdint.h>
	#include <arpa/inet.h>

	#include "ipmid-api.h"
	#include "ipmid.H"
	#include "transporthandler.h"

	#define SYSTEMD_NETWORKD_DBUS 1

	#ifdef SYSTEMD_NETWORKD_DBUS
	#include <systemd/sd-bus.h>
	#endif

	// OpenBMC System Manager dbus framework
	const char *app = "org.openbmc.NetworkManager";
	const char *obj = "/org/openbmc/NetworkManager/Interface";
	const char *ifc = "org.openbmc.NetworkManager";

	const int SIZE_MAC = 18; //xx:xx:xx:xx:xx:xx
	const int SIZE_LAN_PARM = 16; //xxx.xxx.xxx.xxx

	char cur_ipaddr [16] = "";
	char cur_netmask [16] = "";
	char cur_gateway [16] = "";

	char new_ipaddr [16] = "";
	char new_netmask [16] = "";
	char new_gateway [16] = "";

	void register_netfn_transport_functions() __attribute__((constructor));

	ipmi_ret_t ipmi_transport_wildcard(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	printf("Handling TRANSPORT WILDCARD Netfn:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
	// Status code.
	ipmi_ret_t rc = IPMI_CC_OK;
	*data_len = 0;
	return rc;
	}

	struct set_lan_t {
	uint8_t channel;
	uint8_t parameter;
	uint8_t data[8]; // Per IPMI spec, not expecting more than this size
	} __attribute__ ((packed));

	ipmi_ret_t ipmi_transport_set_lan(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	ipmi_ret_t rc = IPMI_CC_OK;
	*data_len = 0;
	sd_bus *bus = ipmid_get_sd_bus_connection();
	sd_bus_message reply = NULL, m = NULL;
	sd_bus_error error = SD_BUS_ERROR_NULL;
	int r = 0;

	printf("IPMI SET_LAN\n");

	set_lan_t reqptr = (set_lan_t) request;

	// TODO Use dbus interface once available. For now use cmd line.
	// TODO Add the rest of the parameters like setting auth type
	// TODO Add error handling

	if (reqptr->parameter == LAN_PARM_IP)
	{
	snprintf(new_ipaddr, SIZE_LAN_PARM, "%d.%d.%d.%d",
	reqptr->data[0], reqptr->data[1], reqptr->data[2], reqptr->data[3]);
	}
	else if (reqptr->parameter == LAN_PARM_MAC)
	{
	char mac[SIZE_MAC];

	snprintf(mac, SIZE_MAC, "%02x:%02x:%02x:%02x:%02x:%02x",
	reqptr->data[0],
	reqptr->data[1],
	reqptr->data[2],
	reqptr->data[3],
	reqptr->data[4],
	reqptr->data[5]);

	r = sd_bus_message_new_method_call(bus,&m,app,obj,ifc,"SetHwAddress");
	if (r < 0) {
	fprintf(stderr, "Failed to add method object: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_message_append(m, "s", mac);
	if (r < 0) {
	fprintf(stderr, "Failed to append message data: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_call(bus, m, 0, &error, &reply);
	if (r < 0) {
	fprintf(stderr, "Failed to call method: %s\n", strerror(-r));
	return -1;
	}
	}
	else if (reqptr->parameter == LAN_PARM_SUBNET)
	{
	snprintf(new_netmask, SIZE_LAN_PARM, "%d.%d.%d.%d",
	reqptr->data[0], reqptr->data[1], reqptr->data[2], reqptr->data[3]);
	}
	else if (reqptr->parameter == LAN_PARM_GATEWAY)
	{
	snprintf(new_gateway, SIZE_LAN_PARM, "%d.%d.%d.%d",
	reqptr->data[0], reqptr->data[1], reqptr->data[2], reqptr->data[3]);
	}
	else if (reqptr->parameter == LAN_PARM_INPROGRESS) // Apply config
	{
	int rc = 0;
	sd_bus_message *req = NULL;
	sd_bus_message *res = NULL;
	sd_bus *bus1 = NULL;
	sd_bus_error err = SD_BUS_ERROR_NULL;

	if (!strcmp(new_ipaddr, "") \|\| !strcmp (new_netmask, "") \|\| !strcmp (new_gateway, ""))
	{
	fprintf(stderr,"ERROR: Incomplete LAN Parameters\n");
	return -1;
	}

	rc = sd_bus_open_system(&bus1);
	if(rc < 0)
	{
	fprintf(stderr,"ERROR: Getting a SYSTEM bus hook\n");
	return -1;
	}

	if (strcmp(cur_ipaddr, ""))
	{
	sd_bus_error_free(&err);
	sd_bus_message_unref(req);
	sd_bus_message_unref(res);

	rc = sd_bus_call_method(bus1, // On the System Bus
	app, // Service to contact
	obj, // Object path
	ifc, // Interface name
	"DelAddress4", // Method to be called
	&err, // object to return error
	&res, // Response message on success
	"ssss", // input message (dev,ip,nm,gw)
	"eth0",
	cur_ipaddr,
	cur_netmask,
	cur_gateway);
	}

	if(rc < 0)
	{
	fprintf(stderr, "Failed to remove existing IP %s: %s\n", cur_ipaddr, err.message);
	return -1;
	}

	sd_bus_error_free(&err);
	sd_bus_message_unref(req);
	sd_bus_message_unref(res);

	rc = sd_bus_call_method(bus1, // On the System Bus
	app, // Service to contact
	obj, // Object path
	ifc, // Interface name
	"AddAddress4", // Method to be called
	&err, // object to return error
	&res, // Response message on success
	"ssss", // input message (dev,ip,nm,gw)
	"eth0",
	new_ipaddr,
	new_netmask,
	new_gateway);
	if(rc < 0)
	{
	fprintf(stderr, "Failed to set IP %s: %s\n", new_ipaddr, err.message);
	return -1;
	}

	strcpy (cur_ipaddr, new_ipaddr);
	strcpy (cur_netmask, new_netmask);
	strcpy (cur_gateway, new_gateway);
	}
	else
	{
	fprintf(stderr, "Unsupported parameter 0x%x\n", reqptr->parameter);
	return IPMI_CC_PARM_NOT_SUPPORTED;
	}

	return rc;
	}

	struct get_lan_t {
	uint8_t rev_channel;
	uint8_t parameter;
	uint8_t parameter_set;
	uint8_t parameter_block;
	} __attribute__ ((packed));

	ipmi_ret_t ipmi_transport_get_lan(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	ipmi_ret_t rc = IPMI_CC_OK;
	*data_len = 0;
	sd_bus *bus = ipmid_get_sd_bus_connection();
	sd_bus_message reply = NULL, m = NULL;
	sd_bus_error error = SD_BUS_ERROR_NULL;
	int r = 0;
	const uint8_t current_revision = 0x11; // Current rev per IPMI Spec 2.0

	int family;
	unsigned char prefixlen;
	unsigned char scope;
	unsigned int flags;
	char *saddr = NULL;
	int i = 0;

	printf("IPMI GET_LAN\n");

	get_lan_t reqptr = (get_lan_t) request;

	if (reqptr->rev_channel & 0x80) // Revision is bit 7
	{
	// Only current revision was requested
	*data_len = sizeof(current_revision);
	memcpy(response, &current_revision, *data_len);
	return IPMI_CC_OK;
	}

	// TODO Use dbus interface once available. For now use ip cmd.
	// TODO Add the rest of the parameters, like gateway

	if (reqptr->parameter == LAN_PARM_INPROGRESS)
	{
	uint8_t buf[] = {current_revision,0};
	*data_len = sizeof(buf);
	memcpy(response, &buf, *data_len);
	return IPMI_CC_OK;
	}
	else if (reqptr->parameter == LAN_PARM_AUTHSUPPORT)
	{
	uint8_t buf[] = {current_revision,0x04};
	*data_len = sizeof(buf);
	memcpy(response, &buf, *data_len);
	return IPMI_CC_OK;
	}
	else if (reqptr->parameter == LAN_PARM_AUTHENABLES)
	{
	uint8_t buf[] = {current_revision,0x04,0x04,0x04,0x04,0x04};
	*data_len = sizeof(buf);
	memcpy(response, &buf, *data_len);
	return IPMI_CC_OK;
	}
	else if (reqptr->parameter == LAN_PARM_IP)
	{
	const char* device = "eth0";
	uint8_t buf[5]; // Size of expected IPMI response msg

	r = sd_bus_message_new_method_call(bus,&m,app,obj,ifc,"GetAddress4");
	if (r < 0) {
	fprintf(stderr, "Failed to add method object: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_message_append(m, "s", device);
	if (r < 0) {
	fprintf(stderr, "Failed to append message data: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_call(bus, m, 0, &error, &reply);
	if (r < 0) {
	fprintf(stderr, "Failed to call method: %s\n", strerror(-r));
	return -1;
	}
	rc = sd_bus_message_enter_container (reply, 'a', "(iyyus)");
	if(rc < 0)
	{
	fprintf(stderr, "Failed to parse response message:[%s]\n", strerror(-rc));
	return -1;
	}
	rc = sd_bus_message_read(reply, "(iyyus)", &family, &prefixlen, &scope, &flags, &saddr);
	if (rc < 0)
	{
	fprintf(stderr, "Failed to receive response: %s\n", strerror(-r));
	return -1;
	}

	printf("%s:%d:%d:%d:%s\n", family==AF_INET?"IPv4":"IPv6", prefixlen, scope, flags, saddr);

	memcpy((void*)&buf[0], &current_revision, 1);

	// Parse IP address
	char *tokptr = NULL;
	char* digit = strtok_r(saddr, ".", &tokptr);
	if (digit == NULL)
	{
	fprintf(stderr, "Unexpected IP format: %s", saddr);
	return IPMI_CC_RESPONSE_ERROR;
	}
	i = 0;
	while (digit != NULL)
	{
	int resp_byte = strtoul(digit, NULL, 10);
	memcpy((void*)&buf[i+1], &resp_byte, 1);
	i++;
	digit = strtok_r(NULL, ".", &tokptr);
	}

	*data_len = sizeof(buf);
	memcpy(response, &buf, *data_len);

	return IPMI_CC_OK;
	}
	else if (reqptr->parameter == LAN_PARM_MAC)
	{
	//string to parse: link/ether xx:xx:xx:xx:xx:xx

	const char* device = "eth0";
	uint8_t buf[7];
	char *eaddr1 = NULL;

	r = sd_bus_message_new_method_call(bus,&m,app,obj,ifc,"GetHwAddress");
	if (r < 0) {
	fprintf(stderr, "Failed to add method object: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_message_append(m, "s", device);
	if (r < 0) {
	fprintf(stderr, "Failed to append message data: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_call(bus, m, 0, &error, &reply);
	if (r < 0) {
	fprintf(stderr, "Failed to call method: %s\n", strerror(-r));
	return -1;
	}
	r = sd_bus_message_read(reply, "s", &eaddr1);
	if (r < 0) {
	fprintf(stderr, "Failed to get a response: %s", strerror(-r));
	return IPMI_CC_RESPONSE_ERROR;
	}
	if (eaddr1 == NULL)
	{
	fprintf(stderr, "Failed to get a valid response: %s", strerror(-r));
	return IPMI_CC_RESPONSE_ERROR;
	}

	memcpy((void*)&buf[0], &current_revision, 1);

	char *tokptr = NULL;
	char* digit = strtok_r(eaddr1, ":", &tokptr);
	if (digit == NULL)
	{
	fprintf(stderr, "Unexpected MAC format: %s", eaddr1);
	return IPMI_CC_RESPONSE_ERROR;
	}

	i=0;
	while (digit != NULL)
	{
	int resp_byte = strtoul(digit, NULL, 16);
	memcpy((void*)&buf[i+1], &resp_byte, 1);
	i++;
	digit = strtok_r(NULL, ":", &tokptr);
	}

	*data_len = sizeof(buf);
	memcpy(response, &buf, *data_len);

	return IPMI_CC_OK;
	}
	else
	{
	fprintf(stderr, "Unsupported parameter 0x%x\n", reqptr->parameter);
	return IPMI_CC_PARM_NOT_SUPPORTED;
	}

	return rc;
	}

	void register_netfn_transport_functions()
	{
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_TRANSPORT, IPMI_CMD_WILDCARD);
	ipmi_register_callback(NETFUN_TRANSPORT, IPMI_CMD_WILDCARD, NULL, ipmi_transport_wildcard);

	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_TRANSPORT, IPMI_CMD_SET_LAN);
	ipmi_register_callback(NETFUN_TRANSPORT, IPMI_CMD_SET_LAN, NULL, ipmi_transport_set_lan);

	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_TRANSPORT, IPMI_CMD_GET_LAN);
	ipmi_register_callback(NETFUN_TRANSPORT, IPMI_CMD_GET_LAN, NULL, ipmi_transport_get_lan);

	return;
	}