path: root/lib/command.h

/*
 * Zebra configuration command interface routine
 * Copyright (C) 1997, 98 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * GNU Zebra 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU Zebra; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef _ZEBRA_COMMAND_H
#define _ZEBRA_COMMAND_H

#include <stdbool.h>

#include "node_type.h"
#include "vector.h"
#include "qstring.h"

#ifndef Inline
#define Inline static inline
#endif

struct vty ;                            /* in case command.h expanded first */

/* Host configuration variable */
struct host
{
  /* Host name of this router. */
  char *name;

  /* Password for vty interface. */
  char *password;
  char *password_encrypt;

  /* Enable password */
  char *enable;
  char *enable_encrypt;

  /* System wide terminal lines. */
  int lines;

  /* Log filename. */
  char *logfile;

  /* config file name of this host */
  char *config;

  /* Flags for services */
  int advanced;
  int encrypt;

  /* Banner configuration. */
  const char *motd;
  char *motdfile;
};

/* Node which has some commands and prompt string and configuration
   function pointer . */
struct cmd_node
{
  /* Node index. */
  enum node_type node;

  /* Prompt character at vty interface. */
  const char *prompt;

  /* Is this node's configuration goes to vtysh ? */
  int vtysh;

  /* Node's configuration write function */
  int (*func) (struct vty *);

  /* Vector of this node's command list. */
  vector cmd_vector;
};

enum
{
  /* bit significant */
  CMD_ATTR_DEPRECATED = 0x01,
  CMD_ATTR_HIDDEN     = 0x02,
  CMD_ATTR_CALL       = 0x04,
};

/* Return values for command handling.
 *
 * NB: when a command is executed it may return CMD_SUCCESS or CMD_WARNING.
 *
 *     In both cases any output required (including any warning or error
 *     messages) must already have been output.
 *
 *     All other return codes are for use within the command handler.
 */
enum cmd_return_code
{
  CMD_SUCCESS              =  0,
  CMD_WARNING              =  1,
  CMD_ERROR,

  CMD_EMPTY,
  CMD_SUCCESS_DAEMON,

  CMD_CLOSE,
  CMD_QUEUED,

  CMD_ERR_NO_MATCH,
  CMD_ERR_AMBIGUOUS,
  CMD_ERR_INCOMPLETE,

  CMD_COMPLETE_FULL_MATCH,
  CMD_COMPLETE_MATCH,
  CMD_COMPLETE_LIST_MATCH,
  CMD_COMPLETE_ALREADY
} ;

#define MSG_CMD_ERR_AMBIGUOUS      "Ambiguous command"
#define MSG_CMD_ERR_NO_MATCH       "Unrecognised command"
#define MSG_CMD_ERR_NO_MATCH_old   "There is no matched command"

/* Structure of command element.        */

struct cmd_element ;
typedef struct cmd_element* cmd_element ;

typedef const char* const argv_t[] ;

#define DEFUN_CMD_ARG_UNUSED __attribute__ ((unused))
#define DEFUN_CMD_FUNCTION(name) \
  enum cmd_return_code name (cmd_element self   DEFUN_CMD_ARG_UNUSED, \
	                     struct vty* vty    DEFUN_CMD_ARG_UNUSED, \
	                     int argc           DEFUN_CMD_ARG_UNUSED, \
	                     argv_t argv        DEFUN_CMD_ARG_UNUSED)

typedef DEFUN_CMD_FUNCTION((cmd_function)) ;

struct cmd_element
{
  const char *string;		/* Command specification by string. */
  cmd_function* func ;
  const char *doc;		/* Documentation of this command. */
  int daemon;                   /* Daemon to which this command belong. */
  vector strvec;		/* Pointing out each description vector. */
  unsigned int cmdsize;		/* Command index count. */
  char *config;			/* Configuration string */
  vector subconfig;		/* Sub configuration string */
  u_char attr;			/* Command attributes */
};

/* Command description structure.       */
struct desc
{
  char *cmd;                    /* Command string. */
  char *str;                    /* Command's description. */
};

/* Command parsing options                                              */
enum cmd_parse_type               /* bit significant      */
{
  cmd_parse_completion  = 0x00,
  cmd_parse_strict      = 0x01,

  cmd_parse_do          = 0x02,
  cmd_parse_tree        = 0x04,
} ;

/* Parsed command                                                       */
typedef struct cmd_parsed* cmd_parsed ;
struct cmd_parsed
{
  struct cmd_element *cmd ;     /* NULL if empty command
                                        or fails to parse       */

  enum node_type  cnode ;       /* node command is in           */
  enum node_type  onode ;       /* node the parser started in   */

  bool            do_shortcut ; /* true => is "do" command      */

  qstring_t       words ;       /* the words, '\0' separated    */

  vector_t        vline ;       /* pointers to the words        */
} ;


/* Command dispatch options                                             */
enum {
  cmd_no_queue  = true,
  cmd_may_queue = false,
} ;

/*------------------------------------------------------------------------------
 * Can now include these
 */

#include "vty.h"
#include "uty.h"

/*----------------------------------------------------------------------------*/
/* Turn off these macros when uisng cpp with extract.pl */
#ifndef VTYSH_EXTRACT_PL

/* helper defines for end-user DEFUN* macros */
#define DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, attrs, dnum) \
  struct cmd_element cmdname = \
  { \
    .string = cmdstr, \
    .func = funcname, \
    .doc = helpstr, \
    .attr = attrs, \
    .daemon = dnum, \
  };

#define DEFUN_CMD_FUNC_DECL(funcname) \
  static cmd_function funcname;

#define DEFUN_CMD_FUNC_TEXT(funcname) \
  static DEFUN_CMD_FUNCTION(funcname)

/* DEFUN for vty command interafce. Little bit hacky ;-). */
#define DEFUN(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_FUNC_DECL(funcname) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, 0, 0) \
  DEFUN_CMD_FUNC_TEXT(funcname)

#define DEFUN_ATTR(funcname, cmdname, cmdstr, helpstr, attr) \
  DEFUN_CMD_FUNC_DECL(funcname) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, attr, 0) \
  DEFUN_CMD_FUNC_TEXT(funcname)

#define DEFUN_HIDDEN(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_ATTR (funcname, cmdname, cmdstr, helpstr, CMD_ATTR_HIDDEN)

#define DEFUN_HID_CALL(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_ATTR (funcname, cmdname, cmdstr, helpstr, (CMD_ATTR_CALL | CMD_ATTR_HIDDEN))

#define DEFUN_DEPRECATED(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_ATTR (funcname, cmdname, cmdstr, helpstr, CMD_ATTR_DEPRECATED)

#define DEFUN_DEP_CALL(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_ATTR (funcname, cmdname, cmdstr, helpstr, (CMD_ATTR_CALL | CMD_ATTR_DEPRECATED))

#define DEFUN_CALL(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_ATTR (funcname, cmdname, cmdstr, helpstr, CMD_ATTR_CALL)

/* DEFUN_NOSH for commands that vtysh should ignore */
#define DEFUN_NOSH(funcname, cmdname, cmdstr, helpstr) \
  DEFUN(funcname, cmdname, cmdstr, helpstr)

/* DEFSH for vtysh. */
#define DEFSH(daemon, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(NULL, cmdname, cmdstr, helpstr, 0, daemon)

/* DEFUN + DEFSH */
#define DEFUNSH(daemon, funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_FUNC_DECL(funcname) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, 0, daemon) \
  DEFUN_CMD_FUNC_TEXT(funcname)

/* DEFUN + DEFSH with attributes */
#define DEFUNSH_ATTR(daemon, funcname, cmdname, cmdstr, helpstr, attr) \
  DEFUN_CMD_FUNC_DECL(funcname) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, attr, daemon) \
  DEFUN_CMD_FUNC_TEXT(funcname)

#define DEFUNSH_HIDDEN(daemon, funcname, cmdname, cmdstr, helpstr) \
  DEFUNSH_ATTR (daemon, funcname, cmdname, cmdstr, helpstr, CMD_ATTR_HIDDEN)

#define DEFUNSH_DEPRECATED(daemon, funcname, cmdname, cmdstr, helpstr) \
  DEFUNSH_ATTR (daemon, funcname, cmdname, cmdstr, helpstr, CMD_ATTR_DEPRECATED)

/* ALIAS macro which define existing command's alias. */
#define ALIAS(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, 0, 0)

#define ALIAS_ATTR(funcname, cmdname, cmdstr, helpstr, attr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, attr, 0)

#define ALIAS_HIDDEN(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, CMD_ATTR_HIDDEN, 0)

#define ALIAS_DEPRECATED(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, CMD_ATTR_DEPRECATED, 0)

#define ALIAS_CALL(funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, CMD_ATTR_CALL, 0)

#define ALIAS_SH(daemon, funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, 0, daemon)

#define ALIAS_SH_HIDDEN(daemon, funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, CMD_ATTR_HIDDEN, daemon)

#define ALIAS_SH_DEPRECATED(daemon, funcname, cmdname, cmdstr, helpstr) \
  DEFUN_CMD_ELEMENT(funcname, cmdname, cmdstr, helpstr, CMD_ATTR_DEPRECATED, daemon)

#endif /* VTYSH_EXTRACT_PL */

/* Some macroes */
#define CMD_OPTION(S)   ((S[0]) == '[')
#define CMD_VARIABLE(S) (((S[0]) >= 'A' && (S[0]) <= 'Z') || ((S[0]) == '<'))
#define CMD_VARARG(S)   ((S[0]) == '.')
#define CMD_RANGE(S)	((S[0] == '<'))

#define CMD_IPV4(S)	   ((strcmp ((S), "A.B.C.D") == 0))
#define CMD_IPV4_PREFIX(S) ((strcmp ((S), "A.B.C.D/M") == 0))
#define CMD_IPV6(S)        ((strcmp ((S), "X:X::X:X") == 0))
#define CMD_IPV6_PREFIX(S) ((strcmp ((S), "X:X::X:X/M") == 0))

/* Common descriptions. */
#define SHOW_STR "Show running system information\n"
#define IP_STR "IP information\n"
#define IPV6_STR "IPv6 information\n"
#define NO_STR "Negate a command or set its defaults\n"
#define REDIST_STR "Redistribute information from another routing protocol\n"
#define CLEAR_STR "Reset functions\n"
#define RIP_STR "RIP information\n"
#define BGP_STR "BGP information\n"
#define OSPF_STR "OSPF information\n"
#define NEIGHBOR_STR "Specify neighbor router\n"
#define DEBUG_STR "Debugging functions (see also 'undebug')\n"
#define UNDEBUG_STR "Disable debugging functions (see also 'debug')\n"
#define ROUTER_STR "Enable a routing process\n"
#define AS_STR "AS number\n"
#define MBGP_STR "MBGP information\n"
#define MATCH_STR "Match values from routing table\n"
#define SET_STR "Set values in destination routing protocol\n"
#define OUT_STR "Filter outgoing routing updates\n"
#define IN_STR  "Filter incoming routing updates\n"
#define V4NOTATION_STR "specify by IPv4 address notation(e.g. 0.0.0.0)\n"
#define OSPF6_NUMBER_STR "Specify by number\n"
#define INTERFACE_STR "Interface infomation\n"
#define IFNAME_STR "Interface name(e.g. ep0)\n"
#define IP6_STR "IPv6 Information\n"
#define OSPF6_STR "Open Shortest Path First (OSPF) for IPv6\n"
#define OSPF6_ROUTER_STR "Enable a routing process\n"
#define OSPF6_INSTANCE_STR "<1-65535> Instance ID\n"
#define SECONDS_STR "<1-65535> Seconds\n"
#define ROUTE_STR "Routing Table\n"
#define PREFIX_LIST_STR "Build a prefix list\n"
#define OSPF6_DUMP_TYPE_LIST \
"(neighbor|interface|area|lsa|zebra|config|dbex|spf|route|lsdb|redistribute|hook|asbr|prefix|abr)"
#define ISIS_STR "IS-IS information\n"
#define AREA_TAG_STR "[area tag]\n"

#define CONF_BACKUP_EXT ".sav"

/* IPv4 only machine should not accept IPv6 address for peer's IP
   address.  So we replace VTY command string like below. */
#ifdef HAVE_IPV6
#define NEIGHBOR_CMD       "neighbor (A.B.C.D|X:X::X:X) "
#define NO_NEIGHBOR_CMD    "no neighbor (A.B.C.D|X:X::X:X) "
#define NEIGHBOR_ADDR_STR  "Neighbor address\nIPv6 address\n"
#define NEIGHBOR_CMD2      "neighbor (A.B.C.D|X:X::X:X|WORD) "
#define NO_NEIGHBOR_CMD2   "no neighbor (A.B.C.D|X:X::X:X|WORD) "
#define NEIGHBOR_ADDR_STR2 "Neighbor address\nNeighbor IPv6 address\nNeighbor tag\n"
#else
#define NEIGHBOR_CMD       "neighbor A.B.C.D "
#define NO_NEIGHBOR_CMD    "no neighbor A.B.C.D "
#define NEIGHBOR_ADDR_STR  "Neighbor address\n"
#define NEIGHBOR_CMD2      "neighbor (A.B.C.D|WORD) "
#define NO_NEIGHBOR_CMD2   "no neighbor (A.B.C.D|WORD) "
#define NEIGHBOR_ADDR_STR2 "Neighbor address\nNeighbor tag\n"
#endif /* HAVE_IPV6 */

/* Prototypes. */
extern void cmd_init (int);
extern void cmd_terminate (void);

extern void print_version (const char *);

extern void install_node (struct cmd_node *, int (*) (struct vty *));
extern void install_default (enum node_type);
extern void install_element (enum node_type, struct cmd_element *);
extern void sort_node (void);

/* Concatenates argv[shift] through argv[argc-1] into a single NUL-terminated
   string with a space between each element (allocated using
   XMALLOC(MTYPE_TMP)).  Returns NULL if shift >= argc. */
extern char *argv_concat (const char* const* argv, int argc, int shift);

/* struct host global, ick */
extern struct host host;

#ifdef QDEBUG
extern const char *debug_banner ;
#endif

#endif /* _ZEBRA_COMMAND_H */