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/*
* ProFTPD - FTP server daemon
* Copyright (c) 1997, 1998 Public Flood Software
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __MODULES_H
#define __MODULES_H
typedef struct module_struc module;
typedef struct modret_struc modret_t;
struct modret_struc {
module *mr_handler_module; /* which module handled this? */
int mr_error; /* !0 if error */
char *mr_numeric; /* numeric error code */
char *mr_message; /* text message */
void *data; /* add'l data -- undefined */
};
/* Possible error codes for auth handlers
*/
/* Account does not exist */
#define AUTH_NOPWD -1
/* Password mismatch */
#define AUTH_BADPWD -2
/* Password hasn't been changed recently enough */
#define AUTH_AGEPWD -3
/* Account has been disabled */
#define AUTH_DISABLEDPWD -4
/* The following macros are for creating basic modret_t, and can
* only be used inside of module handlers
*/
#define MODRET static modret_t*
#define HANDLED(cmd) mod_create_ret((cmd),\
0,NULL,NULL)
#define DECLINED(cmd) (modret_t*)NULL
#define ERROR(cmd) mod_create_ret((cmd),\
1,NULL,NULL)
#define ERROR_MSG(cmd,n,m) mod_create_ret((cmd),\
1,(n),(m))
#define ERROR_INT(cmd,n) mod_create_error((cmd),(n))
#define MODRET_ISDECLINED(x) ((x) == NULL)
#define MODRET_ISHANDLED(x) ((x) && !(x)->mr_error)
#define MODRET_ISERROR(x) ((x) && (x)->mr_error)
#define MODRET_HASNUM(x) ((x) && (x)->mr_numeric)
#define MODRET_HASMSG(x) ((x) && (x)->mr_message)
#define MODRET_ERROR(x) ((x) ? (x)->mr_error : 0)
#define MODRET_ERRNUM(x) ((x) ? (x)->mr_numeric : NULL)
#define MODRET_ERRMSG(x) ((x) ? (x)->mr_message : NULL)
#define MODRET_HASDATA(x) ((x) ? ((x)->data ? TRUE : FALSE) : FALSE)
/* private data structure returned by mod_priv* */
struct privdata {
char *tag;
union {
void *ptr_val;
int int_val;
long long_val;
char *str_val;
} value;
module *m;
};
typedef struct {
char *directive;
modret_t *(*handler)(cmd_rec*);
module *m; /* Reference to owning module
* set when module is initialized
*/
} conftable;
/* classes for command table */
#define CL_NONE 0x0
#define CL_AUTH (1 << 0)
/* USER, PASS */
#define CL_INFO (1 << 1)
/* Informational commands (PWD, SYST, etc) */
#define CL_DIRS (1 << 2)
/* Directory commands (LIST, NLST, CWD, etc) */
#define CL_READ (1 << 3)
/* File reading commands (RETR) */
#define CL_WRITE (1 << 4)
/* Writing commands (STOR, MKD, etc) */
#define CL_MISC (1 << 5)
/* Miscellaneous (RNFR/RNTO, SITE, etc) */
#define CL_ALL (CL_AUTH|CL_INFO|CL_DIRS|CL_READ| \
CL_WRITE|CL_MISC)
/* command types for command table */
#define PRE_CMD 1
#define CMD 2
#define POST_CMD 3
#define LOG_CMD 4
#define LOG_CMD_ERR 5
typedef struct {
int cmd_type; /* see above for cmd types */
char *command;
char *group; /* Command grouping */
modret_t *(*handler)(cmd_rec*);
int requires_auth; /* Authenication required? */
int interrupt_xfer; /* Allowed to issue during xfer? */
int class;
module *m;
} cmdtable;
typedef struct {
int auth_type; /* future use */
char *name;
modret_t *(*handler)(cmd_rec*);
module *m;
} authtable;
struct module_struc {
module *next,*prev;
int ver; /* API version _not_ module version */
char *name; /* Module name */
conftable *conftable; /* Configuration directive table */
cmdtable *cmdtable; /* Command table */
authtable *authtable; /* Authentication handler table */
int (*module_init)(); /* Module initialization */
int (*module_init_child)(); /* Initialize newly forked child */
int priority; /* internal use, higher == higher priority */
};
/* These are stored in modules.c */
extern conftable *m_conftable; /* Master conftable */
extern cmdtable *m_cmdtable; /* Master cmdtable */
#define ANY_MODULE ((module*)0xffffffff)
/* Prototypes */
void list_modules();
int init_modules(); /* Initialize modules */
int init_child_modules();
modret_t *call_module(module *m, modret_t *(*func)(cmd_rec*), cmd_rec *cmd);
modret_t *call_module_cmd(module *m, modret_t *(*func)(cmd_rec*), cmd_rec *cmd);
modret_t *call_module_auth(module *m, modret_t *(*func)(cmd_rec*), cmd_rec *cmd);
/* Symbol table lookup functions */
conftable *mod_find_conf_symbol(char*,int*,conftable*);
cmdtable *mod_find_cmd_symbol(char*,int*,cmdtable*);
authtable *mod_find_auth_symbol(char*,int*,authtable*);
/* This function is in main.c, but is prototyped here */
void set_auth_check(int (*ck)(cmd_rec*));
void xfer_set_data_port(p_in_addr_t*,int);
/* For use from inside module handler functions */
modret_t *mod_create_ret(cmd_rec*,unsigned char,char*,char*);
modret_t *mod_create_error(cmd_rec*,int);
modret_t *mod_create_data(cmd_rec*,void*);
privdata_t *mod_privdata_alloc(cmd_rec*,char*,int);
privdata_t *mod_privdata_find(cmd_rec*,char*,module*);
/* prototypes for auth.c */
void auth_setpwent(pool*);
void auth_endpwent(pool*);
void auth_setgrent(pool*);
void auth_endgrent(pool*);
struct passwd *auth_getpwent(pool*);
struct group *auth_getgrent(pool*);
struct passwd *auth_getpwnam(pool*,const char*);
struct passwd *auth_getpwuid(pool*,uid_t);
struct group *auth_getgrnam(pool*,const char*);
struct group *auth_getgrgid(pool*,gid_t);
int auth_authenticate(pool*,const char*,const char*);
int auth_check(pool*,const char*,const char*,const char*);
const char *auth_uid_name(pool*,uid_t);
const char *auth_gid_name(pool*,gid_t);
uid_t auth_name_uid(pool*,const char*);
gid_t auth_name_gid(pool*,const char*);
#endif /* __MODULES_H */
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