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/*
* Cisco router simulation platform.
* Copyright (c) 2007 Christophe Fillot (cf@utc.fr)
*
* Hypervisor store.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include <stdarg.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <pthread.h>
#include "utils.h"
#include "base64.h"
#include "registry.h"
#include "hypervisor.h"
struct store_object {
char *name; /* Object name */
void *data; /* Data pointer */
size_t len; /* Data length */
};
/* Create an object of the given name */
static struct store_object *so_create(char *name,void *data,size_t len)
{
struct store_object *so;
if (!(so = malloc(sizeof(*so))))
return NULL;
if (!(so->name = strdup(name)))
goto err_name;
so->data = data;
so->len = len;
if (registry_add(so->name,OBJ_TYPE_STORE,so) == -1)
goto err_registry;
return so;
err_registry:
free(so->name);
err_name:
free(so);
return NULL;
}
/* Delete a store object */
static void so_delete(struct store_object *so)
{
if (so != NULL) {
free(so->name);
free(so->data);
free(so);
}
}
/* Free resources used by a store object (registry callback) */
static int so_reg_delete(void *data,void *arg)
{
so_delete((struct store_object *)data);
return(TRUE);
}
/* Delete a store object from the registry */
static int so_delete_from_registry(char *name)
{
return(registry_delete_if_unused(name,OBJ_TYPE_STORE,so_reg_delete,NULL));
}
/* Write an object (data provided in base64 encoding) */
static int cmd_write(hypervisor_conn_t *conn,int argc,char *argv[])
{
struct store_object *so;
u_char *buffer;
ssize_t len;
/* Convert base64 input to standard text */
if (!(buffer = malloc(3 * strlen(argv[1]))))
goto err_alloc_base64;
if ((len = base64_decode(buffer,(u_char *)argv[1],0)) < 0)
goto err_decode_base64;
if (!(so = so_create(argv[0],buffer,len))) {
free(buffer);
hypervisor_send_reply(conn,HSC_ERR_CREATE,1,"unable to store object");
return(-1);
}
registry_unref(so->name,OBJ_TYPE_STORE);
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK");
return(0);
err_decode_base64:
free(buffer);
err_alloc_base64:
hypervisor_send_reply(conn,HSC_ERR_CREATE,1,"unable to decode base64");
return(-1);
}
/* Read an object and return data in base64 encoding */
static int cmd_read(hypervisor_conn_t *conn,int argc,char *argv[])
{
struct store_object *so;
u_char *buffer;
if (!(so = hypervisor_find_object(conn,argv[0],OBJ_TYPE_STORE)))
return(-1);
/*
* Convert data to base64. base64 is about 1/3 larger than input,
* let's be on the safe side with twice longer.
*/
if (!(buffer = malloc(so->len * 2)))
goto err_alloc_base64;
base64_encode(buffer,so->data,so->len);
registry_unref(so->name,OBJ_TYPE_STORE);
hypervisor_send_reply(conn,HSC_INFO_OK,1,"%s",buffer);
free(buffer);
return(0);
err_alloc_base64:
registry_unref(so->name,OBJ_TYPE_STORE);
hypervisor_send_reply(conn,HSC_ERR_CREATE,1,
"unable to encode data in base64",
argv[0]);
return(-1);
}
/* Delete an object from the store */
static int cmd_delete(hypervisor_conn_t *conn,int argc,char *argv[])
{
if (so_delete_from_registry(argv[0]) < 0) {
hypervisor_send_reply(conn,HSC_ERR_DELETE,1,"unable to delete object %s",
argv[0]);
return(-1);
} else {
hypervisor_send_reply(conn,HSC_INFO_OK,1,"object %s deleted",argv[0]);
return(0);
}
}
/* Delete all objects from the store */
static int cmd_delete_all(hypervisor_conn_t *conn,int argc,char *argv[])
{
registry_delete_type(OBJ_TYPE_STORE,so_reg_delete,NULL);
hypervisor_send_reply(conn,HSC_INFO_OK,1,"object store deleted");
return(0);
}
/* Show info about a store object */
static void cmd_show_obj_list(registry_entry_t *entry,void *opt,int *err)
{
hypervisor_conn_t *conn = opt;
struct store_object *so = entry->data;
hypervisor_send_reply(conn,HSC_INFO_MSG,0,"%s (len=%ld)",
entry->name,(long)so->len);
}
/* Object list */
static int cmd_obj_list(hypervisor_conn_t *conn,int argc,char *argv[])
{
int err = 0;
registry_foreach_type(OBJ_TYPE_STORE,cmd_show_obj_list,conn,&err);
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK");
return(0);
}
/* "store" commands */
static hypervisor_cmd_t store_cmd_array[] = {
{ "write", 2, 2, cmd_write, NULL },
{ "read", 1, 1, cmd_read, NULL },
{ "delete", 1, 1, cmd_delete, NULL },
{ "delete_all", 0, 0, cmd_delete_all, NULL },
{ "list", 0, 0, cmd_obj_list, NULL },
{ NULL, -1, -1, NULL, NULL },
};
/* Hypervisor store initialization */
int hypervisor_store_init(void)
{
hypervisor_module_t *module;
module = hypervisor_register_module("object_store",NULL);
assert(module != NULL);
hypervisor_register_cmd_array(module,store_cmd_array);
return(0);
}
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