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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1990 Mentat Inc. */
#ifndef _INET_OPTCOM_H
#define _INET_OPTCOM_H
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_KERNEL) && defined(__STDC__)
#include <inet/ipclassifier.h>
/* Options Description Structure */
typedef struct opdes_s {
t_uscalar_t opdes_name; /* option name */
t_uscalar_t opdes_level; /* option "level" */
int opdes_access_nopriv; /* permissions for non-privileged */
int opdes_access_priv; /* permissions for privileged */
int opdes_access_req_priv; /* required privilege, OP_NP if none */
int opdes_props; /* properties of associated with option */
t_uscalar_t opdes_size; /* length of option */
/* [ or maxlen if variable */
/* length(OP_VARLEN) property set for option] */
union {
/*
*
* Note: C semantics:
* static initializer of "union" type assume
* the constant on RHS is of the type of the
* first member of the union. So what comes first
* is important.
*/
#define OPDES_DEFSZ_MAX 64
int64_t opdes_def_int64;
char opdes_def_charbuf[OPDES_DEFSZ_MAX];
} opdes_def;
} opdes_t;
#define opdes_default opdes_def.opdes_def_int64
#define opdes_defbuf opdes_def.opdes_def_charbuf
/*
* Flags to set in opdes_acces_{all,priv} fields in opdes_t
*
* OA_R read access
* OA_W write access
* OA_RW read-write access
* OA_X execute access
*
* Note: - semantics "execute" access used for operations excuted using
* option management interface
* - no bits set means this option is not visible. Some options may not
* even be visible to all but priviliged users.
*/
#define OA_R 0x1
#define OA_W 0x2
#define OA_X 0x4
/*
* Utility macros to test permissions needed to compose more
* complex ones. (Only a few really used directly in code).
*/
#define OA_RW (OA_R|OA_W)
#define OA_WX (OA_W|OA_X)
#define OA_RX (OA_R|OA_X)
#define OA_RWX (OA_R|OA_W|OA_X)
#define OA_ANY_ACCESS(x) ((x)->opdes_access_nopriv|(x)->opdes_access_priv)
#define OA_R_NOPRIV(x) ((x)->opdes_access_nopriv & OA_R)
#define OA_R_ANYPRIV(x) (OA_ANY_ACCESS(x) & OA_R)
#define OA_W_NOPRIV(x) ((x)->opdes_access_nopriv & OA_W)
#define OA_X_ANYPRIV(x) (OA_ANY_ACCESS(x) & OA_X)
#define OA_X_NOPRIV(x) ((x)->opdes_access_nopriv & OA_X)
#define OA_W_ANYPRIV(x) (OA_ANY_ACCESS(x) & OA_W)
#define OA_WX_NOPRIV(x) ((x)->opdes_access_nopriv & OA_WX)
#define OA_WX_ANYPRIV(x) (OA_ANY_ACCESS(x) & OA_WX)
#define OA_RWX_ANYPRIV(x) (OA_ANY_ACCESS(x) & OA_RWX)
#define OA_RONLY_NOPRIV(x) (((x)->opdes_access_nopriv & OA_RWX) == OA_R)
#define OA_RONLY_ANYPRIV(x) ((OA_ANY_ACCESS(x) & OA_RWX) == OA_R)
#define OP_NP (-1) /* No privilege required */
#define OP_CONFIG (0) /* Network configuration */
#define OP_RAW (1) /* Raw packets */
#define OP_PRIVPORT (2) /* Privileged ports */
/*
* Following macros supply the option and their privilege and
* are used to determine permissions.
*/
#define OA_POLICY_OK(x, c) \
(secpolicy_ip((c), (x)->opdes_access_req_priv, B_FALSE) == 0)
#define OA_POLICY_ONLY_OK(x, c) \
(secpolicy_ip((c), (x)->opdes_access_req_priv, B_TRUE) == 0)
#define OA_MATCHED_PRIV(x, c) ((x)->opdes_access_req_priv != OP_NP && \
OA_POLICY_ONLY_OK((x), (c)))
#define OA_READ_PERMISSION(x, c) (OA_R_NOPRIV(x) || \
(OA_R_ANYPRIV(x) && OA_POLICY_OK((x), (c))))
#define OA_WRITE_OR_EXECUTE(x, c) (OA_WX_NOPRIV(x) || \
(OA_WX_ANYPRIV(x) && OA_POLICY_OK((x), (c))))
#define OA_READONLY_PERMISSION(x, c) (OA_RONLY_NOPRIV(x) || \
(OA_RONLY_ANYPRIV(x) && OA_POLICY_OK((x), (c))))
#define OA_WRITE_PERMISSION(x, c) (OA_W_NOPRIV(x) || \
(OA_W_ANYPRIV(x) && OA_POLICY_ONLY_OK((x), (c))))
#define OA_EXECUTE_PERMISSION(x, c) (OA_X_NOPRIV(x) || \
(OA_X_ANYPRIV(x) && OA_POLICY_ONLY_OK((x), (c))))
#define OA_NO_PERMISSION(x, c) (OA_MATCHED_PRIV((x), (c)) ? \
((x)->opdes_access_priv == 0) : ((x)->opdes_access_nopriv == 0))
/*
* Other properties set in opdes_props field.
*/
#define OP_VARLEN 0x1 /* option is varible length */
#define OP_NOT_ABSREQ 0x2 /* option is not a "absolute requirement" */
/* i.e. failure to negotiate does not */
/* abort primitive ("ignore" semantics ok) */
#define OP_NODEFAULT 0x4 /* no concept of "default value" */
#define OP_DEF_FN 0x8 /* call a "default function" to get default */
/* value, not from static table */
/*
* Structure to represent attributed of option management specific
* to one particular layer of "transport".
*/
typedef t_uscalar_t optlevel_t;
typedef int (*opt_def_fn)(queue_t *, int, int, uchar_t *);
typedef int (*opt_get_fn)(queue_t *, int, int, uchar_t *);
typedef int (*opt_set_fn)(queue_t *, uint_t, int, int, uint_t, uchar_t *,
uint_t *, uchar_t *, void *, cred_t *);
typedef struct optdb_obj {
opt_def_fn odb_deffn; /* default value function */
opt_get_fn odb_getfn; /* get function */
opt_set_fn odb_setfn; /* set function */
/* provider or downstream */
uint_t odb_opt_arr_cnt; /* count of number of options in db */
opdes_t *odb_opt_des_arr; /* option descriptors in db */
uint_t odb_valid_levels_arr_cnt;
/* count of option levels supported */
optlevel_t *odb_valid_levels_arr;
/* array of option levels supported */
} optdb_obj_t;
/*
* Values for "optset_context" parameter passed to
* transport specific "setfn()" routines
*/
#define SETFN_OPTCOM_CHECKONLY 1 /* "checkonly" semantics T_CHECK */
#define SETFN_OPTCOM_NEGOTIATE 2 /* semantics for T_*_OPTCOM_REQ */
#define SETFN_UD_NEGOTIATE 3 /* semantics for T_UNITDATA_REQ */
#define SETFN_CONN_NEGOTIATE 4 /* semantics for T_CONN_*_REQ */
/*
* Function prototypes
*/
extern void optcom_err_ack(queue_t *, mblk_t *, t_scalar_t, int);
extern void svr4_optcom_req(queue_t *, mblk_t *, cred_t *, optdb_obj_t *);
extern void tpi_optcom_req(queue_t *, mblk_t *, cred_t *, optdb_obj_t *);
extern int tpi_optcom_buf(queue_t *, mblk_t *, t_scalar_t *, t_scalar_t,
cred_t *, optdb_obj_t *, void *, int *);
extern t_uscalar_t optcom_max_optsize(opdes_t *, uint_t);
extern int optcom_pkt_set(uchar_t *, uint_t, uchar_t **, uint_t *);
extern int process_auxiliary_options(conn_t *, void *, t_uscalar_t,
void *, optdb_obj_t *, int (*)(conn_t *, uint_t, int, int, uint_t,
uchar_t *, uint_t *, uchar_t *, void *, cred_t *), cred_t *);
#endif /* defined(_KERNEL) && defined(__STDC__) */
#ifdef __cplusplus
}
#endif
#endif /* _INET_OPTCOM_H */
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