/* libguestfs
 * Copyright (C) 2009-2010 Red Hat Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef GUESTFS_INTERNAL_H_
#define GUESTFS_INTERNAL_H_

#define STREQ(a,b) (strcmp((a),(b)) == 0)
#define STRCASEEQ(a,b) (strcasecmp((a),(b)) == 0)
#define STRNEQ(a,b) (strcmp((a),(b)) != 0)
#define STRCASENEQ(a,b) (strcasecmp((a),(b)) != 0)
#define STREQLEN(a,b,n) (strncmp((a),(b),(n)) == 0)
#define STRCASEEQLEN(a,b,n) (strncasecmp((a),(b),(n)) == 0)
#define STRNEQLEN(a,b,n) (strncmp((a),(b),(n)) != 0)
#define STRCASENEQLEN(a,b,n) (strncasecmp((a),(b),(n)) != 0)
#define STRPREFIX(a,b) (strncmp((a),(b),strlen((b))) == 0)

#ifdef HAVE_GETTEXT
#include "gettext.h"
#define _(str) dgettext(PACKAGE, (str))
#define N_(str) dgettext(PACKAGE, (str))
#else
#define _(str) str
#define N_(str) str
#endif

#ifdef __linux__
#define CAN_CHECK_PEER_EUID 1
#else
#define CAN_CHECK_PEER_EUID 0
#endif

#define UNIX_PATH_MAX 108

#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif

#ifdef __APPLE__
#define xdr_uint32_t xdr_u_int32_t
#endif

/* Network configuration of the appliance.  Note these addresses are
 * only meaningful within the context of the running appliance.  QEMU
 * translates network connections to these magic addresses into
 * userspace calls on the host (eg. connect(2)).  qemu-doc has a nice
 * diagram which is also useful to refer to.
 *
 * NETWORK: The network.
 *
 * ROUTER: The address of the "host", ie. this library.
 *
 * [Note: If you change NETWORK and ROUTER then you also have to
 * change the network configuration in appliance/init].
 *
 * GUESTFWD_ADDR, GUESTFWD_PORT: The guestfwd feature of qemu
 * magically connects this pseudo-address to the guestfwd channel.  In
 * typical Linux configurations of libguestfs, guestfwd is not
 * actually used any more.
 */
#define NETWORK "169.254.0.0/16"
#define ROUTER "169.254.2.2"
#define GUESTFWD_ADDR "169.254.2.4"
#define GUESTFWD_PORT "6666"

/* GuestFS handle and connection. */
enum state { CONFIG, LAUNCHING, READY, BUSY, NO_HANDLE };

struct guestfs_h
{
  struct guestfs_h *next;	/* Linked list of open handles. */

  /* State: see the state machine diagram in the man page guestfs(3). */
  enum state state;

  int fd[2];			/* Stdin/stdout of qemu. */
  int sock;			/* Daemon communications socket. */
  pid_t pid;			/* Qemu PID. */
  pid_t recoverypid;		/* Recovery process PID. */

  struct timeval launch_t;      /* The time that we called guestfs_launch. */

  char *tmpdir;			/* Temporary directory containing socket. */

  char *qemu_help, *qemu_version; /* Output of qemu -help, qemu -version. */

  char **cmdline;		/* Qemu command line. */
  int cmdline_size;

  int verbose;
  int trace;
  int autosync;
  int direct;
  int recovery_proc;

  char *path;			/* Path to kernel, initrd. */
  char *qemu;			/* Qemu binary. */
  char *append;			/* Append to kernel command line. */

  int memsize;			/* Size of RAM (megabytes). */

  int selinux;                  /* selinux enabled? */

  char *last_error;

  /* Callbacks. */
  guestfs_abort_cb           abort_cb;
  guestfs_error_handler_cb   error_cb;
  void *                     error_cb_data;
  guestfs_log_message_cb     log_message_cb;
  void *                     log_message_cb_data;
  guestfs_subprocess_quit_cb subprocess_quit_cb;
  void *                     subprocess_quit_cb_data;
  guestfs_launch_done_cb     launch_done_cb;
  void *                     launch_done_cb_data;
  guestfs_close_cb           close_cb;
  void *                     close_cb_data;

  int msg_next_serial;
};

struct guestfs_message_header;
struct guestfs_message_error;
extern void guestfs_error (guestfs_h *g, const char *fs, ...)
  __attribute__((format (printf,2,3)));
extern void guestfs_perrorf (guestfs_h *g, const char *fs, ...)
  __attribute__((format (printf,2,3)));
extern void *guestfs_safe_realloc (guestfs_h *g, void *ptr, int nbytes);
extern char *guestfs_safe_strdup (guestfs_h *g, const char *str);
extern void *guestfs_safe_memdup (guestfs_h *g, void *ptr, size_t size);
extern int guestfs___set_busy (guestfs_h *g);
extern int guestfs___end_busy (guestfs_h *g);
extern int guestfs___send (guestfs_h *g, int proc_nr, xdrproc_t xdrp, char *args);
extern int guestfs___recv (guestfs_h *g, const char *fn, struct guestfs_message_header *hdr, struct guestfs_message_error *err, xdrproc_t xdrp, char *ret);
extern int guestfs___send_file (guestfs_h *g, const char *filename);
extern int guestfs___recv_file (guestfs_h *g, const char *filename);
extern int guestfs___send_to_daemon (guestfs_h *g, const void *v_buf, size_t n);
extern int guestfs___recv_from_daemon (guestfs_h *g, uint32_t *size_rtn, void **buf_rtn);
extern int guestfs___accept_from_daemon (guestfs_h *g);

#define error guestfs_error
#define perrorf guestfs_perrorf
#define safe_malloc guestfs_safe_malloc
#define safe_realloc guestfs_safe_realloc
#define safe_strdup guestfs_safe_strdup
#define safe_memdup guestfs_safe_memdup

#endif /* GUESTFS_INTERNAL_H_ */