261 lines
11 KiB
C
261 lines
11 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// cmd.h -- Command buffer and command execution
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//===========================================================================
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/*FIXME: rewrite this to use something like the following
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typedef struct
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{
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qbyte groups:27;
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qbyte cvarlatch:1; //latches cvars so the user cannot change them till next map. should be RESTRICT_LOCAL to avoid users cheating by restrict-to-block server commands.
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qbyte seat:4; //for splitscreen binds etc. 1 based! 0 uses in_forceseat/first.
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} cmdaccess_t;
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enum {
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//core groups
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CAG_OWNER = 1<<0, //commands that came from the keyboard (or stdin).
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CAG_MENUQC = 1<<1, //menuqc (mostly allowed to do stuff - but often also has CAG_DOWNLOADED)
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CAG_CSQC = 1<<2, //csqc localcmds, nearly always has CAG_DOWNLOADED, so a load of denies
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CAG_SSQC = 1<<3, //ssqc localcmds, able to poke quite a lot of things, generally unrestricted.
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CAG_SERVER = 1<<4, //ssqc stuffcmds, typically same access as csqc
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//special groups:
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CAG_DOWNLOADED = 1<<5, //for execs that read from a downloaded(untrusted) package. also flagged by qc modules if they were from such packages (so usually included from csqc).
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CAG_SCRIPT = 1<<6, //added for binds (with more than one command), or for aliases/configs. exists for +lookdown's denies (using explicit checks, to avoid cheat bypasses).
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//custom groups:
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CAG_RCON = 1<<7, //commands that came from rcon.
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//groups of groups, for default masks or special denies
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CAG_DEFAULTALLOW = CAG_OWNER|CAG_MENUQC|CAG_CSQC|CAG_SSQC|CAG_SERVER|CAG_RCON,
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CAG_INSECURE = CAG_DOWNLOADED|CAG_SERVER|CAG_CSQC, //csqc included mostly for consistency.
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// userN: defaults to no commands
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// vip: BAN_VIP users
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// mapper: BAN_MAPPER users
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};
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//stuff can be accessed when:
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// if ((command.allows&cbuf.groups) && !(command.denies&cbuf.groups)) accessisallowed;
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//cvars:
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// separate allow-read, deny-read, allow-write, deny-write masks (set according to the older flags, to keep things simple)
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//aliases:
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// alias execution ors in the group(s) that created it (and 'script'). some execution chains could end up with a LOT of groups... FIXME: is that a problem? just don't put potentially restricted things in aliases?
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//binds:
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// also ors the creator's group - no `bind w doevil` and waiting.
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//multiple cbufs:
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// ssqc still has a dedicated cbuf, so that wait commands cause THAT cbuf to wait, not others.
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// rcon+readcmd have a separate cbuf, to try to isolate prints
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//seats:
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// there's no security needed between seats, but server should maybe be blocked from seat switching commands (acting only as asserts), to catch bugs.
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//
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//'p2 nameofalias' sets seat to 2, overriding in_forceseat.
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//+lookup etc is blocked when allow_scripts==0 and indirect is set.
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typedef struct
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{
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cmdpermissions_t p; //access rights
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} cmdstate_t;
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void Cbuf_AddText(const char *text, qboolean addnl, qboolean insert); //null for local? all commands must be \n terminated.
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char *Cbuf_GetNext(cmdpermissions_t permissions, qboolean ignoresemicolon);
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void Cbuf_Execute(cbuf_t *cbuf);
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void Cmd_ExecuteString (const char *text, const cmdstate_t *cstate);
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//rcon can use a private cbuf, allowing it to parse properly despite level changes
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//cbuf must internally track cmdpermissions_t of different blocks. inserstions/additions may merge, others force \n termination (network can do its own buffering).
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typedef void (*xcommand_t) (const cmdstate_t *cstate);
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*/
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/*
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Any number of commands can be added in a frame, from several different sources.
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Most commands come from either keybindings or console line input, but remote
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servers can also send across commands and entire text files can be execed.
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The + command line options are also added to the command buffer.
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The game starts with a Cbuf_AddText ("exec quake.rc\n"); Cbuf_Execute ();
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*/
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void Cbuf_Waited(void);
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void Cbuf_Init (void);
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// allocates an initial text buffer that will grow as needed
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void Cbuf_AddText (const char *text, int level);
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// as new commands are generated from the console or keybindings,
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// the text is added to the end of the command buffer.
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void Cbuf_InsertText (const char *text, int level, qboolean addnl);
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// when a command wants to issue other commands immediately, the text is
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// inserted at the beginning of the buffer, before any remaining unexecuted
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// commands.
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char *Cbuf_GetNext(int level, qboolean ignoresemicolon);
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void Cbuf_Execute (void);
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// Pulls off \n terminated lines of text from the command buffer and sends
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// them through Cmd_ExecuteString. Stops when the buffer is empty.
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// Normally called once per frame, but may be explicitly invoked.
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// Do not call inside a command function!
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extern qboolean cmd_blockwait;
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void Cbuf_ExecuteLevel(int level);
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//executes only a single cbuf level. can be used to restrict cbuf execution to some 'safe' set of commands, so there are no surprise 'map' commands.
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//will not magically make all commands safe to exec, but will prevent user commands slipping in too.
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//===========================================================================
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/*
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Command execution takes a null terminated string, breaks it into tokens,
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then searches for a command or variable that matches the first token.
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*/
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typedef void (*xcommand_t) (void);
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struct xcommandargcompletioncb_s
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{
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//if repl is specified, then that is the text that will be used if this is the sole autocomplete, to complete using strings that are not actually valid.
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void(*cb)(const char *arg, const char *desc, const char *repl, struct xcommandargcompletioncb_s *ctx);
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//private stuff follows.
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};
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typedef void (*xcommandargcompletion_t)(int argn, const char *partial, struct xcommandargcompletioncb_s *ctx);
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int Cmd_Level(const char *name);
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void Cmd_EnumerateLevel(int level, char *buf, size_t bufsize);
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void Cmd_Init (void);
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void Cmd_Shutdown(void);
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void Cmd_StuffCmds (void);
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void Cmd_RemoveCommands (xcommand_t function); //unregister all commands that use the same function. for wrappers and stuff.
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void Cmd_RemoveCommand (const char *cmd_name);
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qboolean Cmd_AddCommand (const char *cmd_name, xcommand_t function);
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qboolean Cmd_AddCommandD (const char *cmd_name, xcommand_t function, const char *description);
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qboolean Cmd_AddCommandAD (const char *cmd_name, xcommand_t function, xcommandargcompletion_t argcomplete, const char *description);
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// called by the init functions of other parts of the program to
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// register commands and functions to call for them.
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// The cmd_name is referenced later, so it should not be in temp memory
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// if function is NULL, the command will be forwarded to the server
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// as a clc_stringcmd instead of executed locally
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qboolean Cmd_Exists (const char *cmd_name);
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char *Cmd_AliasExist(const char *name, int restrictionlevel);
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// used by the cvar code to check for cvar / command name overlap
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const char *Cmd_Describe (const char *cmd_name);
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typedef struct
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{
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char *guessed; //this is the COMPLETED partial.
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char *partial; //the requested string that we completed
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qboolean caseinsens;
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size_t num, extra; //valid count, and ommitted count (if we were too lazy to find more)
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struct cmd_completion_opt_s {
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qboolean text_alloced:1;
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qboolean desc_alloced:1;
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const char *text;
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const char *repl; //used for sole matches
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const char *desc;
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} completions[50];
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} cmd_completion_t;
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cmd_completion_t *Cmd_Complete(const char *partial, qboolean caseinsens); //calculates and caches info.
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//these should probably be removed some time
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char *Cmd_CompleteCommand (const char *partial, qboolean fullonly, qboolean caseinsens, int matchnum, const char **descptr);
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qboolean Cmd_IsCommand (const char *line);
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// attempts to match a partial command for automatic command line completion
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// returns NULL if nothing fits
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int VARGS Cmd_Argc (void);
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char *VARGS Cmd_Argv (int arg);
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char *VARGS Cmd_Args (void);
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extern int Cmd_ExecLevel;
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//if checkheader is false, an opening { is expected to already have been parsed.
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//otherwise returns the contents of the block much like c.
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//returns a zoned string.
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char *Cmd_ParseMultiline(qboolean checkheader);
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extern cvar_t cmd_gamecodelevel, cmd_allowaccess;
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// The functions that execute commands get their parameters with these
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// functions. Cmd_Argv () will return an empty string, not a NULL
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// if arg > argc, so string operations are always safe.
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int Cmd_CheckParm (const char *parm);
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// Returns the position (1 to argc-1) in the command's argument list
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// where the given parameter apears, or 0 if not present
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char *Cmd_AliasExist(const char *name, int restrictionlevel);
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void Alias_WipeStuffedAliases(void);
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void Cmd_AddMacro(char *s, char *(*f)(void), int disputableintentions);
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#define Cmd_AddMacroD(s,f,unsafe,desc) Cmd_AddMacro(s,f,unsafe)
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void Cmd_TokenizePunctation (char *text, char *punctuation);
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const char *Cmd_TokenizeString (const char *text, qboolean expandmacros, qboolean qctokenize);
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// Takes a null terminated string. Does not need to be /n terminated.
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// breaks the string up into arg tokens.
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void Cmd_ExecuteString (const char *text, int restrictionlevel);
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void Cmd_Args_Set(const char *newargs, size_t len);
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//higher levels have greater access, BUT BE SURE TO CHECK Cmd_IsInsecure()
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#define RESTRICT_MAX_TOTAL 31
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#define RESTRICT_MAX_USER 29
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#define RESTRICT_DEFAULT 20
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#define RESTRICT_MIN 1
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#define RESTRICT_TEAMPLAY 0 //this is blocked from everything but aliases.
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#define RESTRICT_MAX RESTRICT_MAX_USER
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#define RESTRICT_LOCAL (RESTRICT_MAX) //commands typed at the console
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#define RESTRICT_INSECURE (RESTRICT_MAX+1) //commands from csqc or untrusted sources (really should be a separate flag, requires cbuf rewrite)
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#define RESTRICT_SERVER (RESTRICT_MAX+2) //commands from ssqc (untrusted, but allowed to lock cvars)
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#define RESTRICT_SERVERSEAT(x) (RESTRICT_SERVER+x)
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#define RESTRICT_RCON rcon_level.ival
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//#define RESTRICT_SSQC RESTRICT_MAX-2
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#define Cmd_FromGamecode() (Cmd_ExecLevel>=RESTRICT_SERVER) //cheat provention. block cheats if its not fromgamecode
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#define Cmd_IsInsecure() (Cmd_ExecLevel>=RESTRICT_INSECURE) //prevention from the server from breaking/crashing/wiping us. if this returns true, block file access etc.
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// Parses a single line of text into arguments and tries to execute it
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// as if it was typed at the console
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void Cmd_ForwardToServer (void);
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// adds the current command line as a clc_stringcmd to the client message.
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// things like godmode, noclip, etc, are commands directed to the server,
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// so when they are typed in at the console, they will need to be forwarded.
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qboolean Cmd_FilterMessage (char *message, qboolean sameteam);
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void Cmd_MessageTrigger (char *message, int type);
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void Cmd_ShiftArgs (int ammount, qboolean expandstring);
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char *Cmd_ExpandString (const char *data, char *dest, int destlen, int *accesslevel, qboolean expandcvars, qboolean expandmacros);
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qboolean If_EvaluateBoolean(const char *text, int restriction);
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extern cvar_t rcon_level;
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void Cmd_AddTimer(float delay, void(*callback)(int iarg, void *data), int iarg, void *data, size_t datasize); //wrong place, gah
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