Reapply643f9a0581
.64d318ea98
was a mismerge during fake rebase. Let's reapply it. Changes include: Added ACL per interface, proxy protocol and bug fixes. Announcement: https://nlnetlabs.nl/news/2022/Oct/13/unbound-1.17.0-released/ Merge commit '643f9a0581e8aac7eb790ced1164748939829826' into main
202 lines
6.0 KiB
C
202 lines
6.0 KiB
C
/*
|
|
* daemon/acl_list.h - client access control storage for the server.
|
|
*
|
|
* Copyright (c) 2007, NLnet Labs. All rights reserved.
|
|
*
|
|
* This software is open source.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* Neither the name of the NLNET LABS nor the names of its contributors may
|
|
* be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
|
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
*
|
|
* This file keeps track of the list of clients that are allowed to
|
|
* access the server.
|
|
*/
|
|
|
|
#ifndef DAEMON_ACL_LIST_H
|
|
#define DAEMON_ACL_LIST_H
|
|
#include "util/storage/dnstree.h"
|
|
#include "services/view.h"
|
|
struct config_file;
|
|
struct regional;
|
|
|
|
/**
|
|
* Enumeration of access control options for an address range.
|
|
* Allow or deny access.
|
|
*/
|
|
enum acl_access {
|
|
/** disallow any access whatsoever, drop it */
|
|
acl_deny = 0,
|
|
/** disallow access, send a polite 'REFUSED' reply */
|
|
acl_refuse,
|
|
/** disallow any access to zones that aren't local, drop it */
|
|
acl_deny_non_local,
|
|
/** disallow access to zones that aren't local, 'REFUSED' reply */
|
|
acl_refuse_non_local,
|
|
/** allow full access for recursion (+RD) queries */
|
|
acl_allow,
|
|
/** allow full access for all queries, recursion and cache snooping */
|
|
acl_allow_snoop,
|
|
/** allow full access for recursion queries and set RD flag regardless of request */
|
|
acl_allow_setrd
|
|
};
|
|
|
|
/**
|
|
* Access control storage structure
|
|
*/
|
|
struct acl_list {
|
|
/** regional for allocation */
|
|
struct regional* region;
|
|
/**
|
|
* Tree of the addresses that are allowed/blocked.
|
|
* contents of type acl_addr.
|
|
*/
|
|
rbtree_type tree;
|
|
};
|
|
|
|
/**
|
|
*
|
|
* An address span with access control information
|
|
*/
|
|
struct acl_addr {
|
|
/** node in address tree */
|
|
struct addr_tree_node node;
|
|
/** access control on this netblock */
|
|
enum acl_access control;
|
|
/** tag bitlist */
|
|
uint8_t* taglist;
|
|
/** length of the taglist (in bytes) */
|
|
size_t taglen;
|
|
/** array per tagnumber of localzonetype(in one byte). NULL if none. */
|
|
uint8_t* tag_actions;
|
|
/** size of the tag_actions_array */
|
|
size_t tag_actions_size;
|
|
/** array per tagnumber, with per tag a list of rdata strings.
|
|
* NULL if none. strings are like 'A 127.0.0.1' 'AAAA ::1' */
|
|
struct config_strlist** tag_datas;
|
|
/** size of the tag_datas array */
|
|
size_t tag_datas_size;
|
|
/* view element, NULL if none */
|
|
struct view* view;
|
|
};
|
|
|
|
/**
|
|
* Create acl structure
|
|
* @return new structure or NULL on error.
|
|
*/
|
|
struct acl_list* acl_list_create(void);
|
|
|
|
/**
|
|
* Delete acl structure.
|
|
* @param acl: to delete.
|
|
*/
|
|
void acl_list_delete(struct acl_list* acl);
|
|
|
|
/**
|
|
* Insert interface in the acl_list. This should happen when the listening
|
|
* interface is setup.
|
|
* @param acl_interface: acl_list to insert to.
|
|
* @param addr: interface IP.
|
|
* @param addrlen: length of the interface IP.
|
|
* @param control: acl_access.
|
|
* @return new structure or NULL on error.
|
|
*/
|
|
struct acl_addr*
|
|
acl_interface_insert(struct acl_list* acl_interface,
|
|
struct sockaddr_storage* addr, socklen_t addrlen,
|
|
enum acl_access control);
|
|
|
|
/**
|
|
* Process access control config.
|
|
* @param acl: where to store.
|
|
* @param cfg: config options.
|
|
* @param v: views structure
|
|
* @return 0 on error.
|
|
*/
|
|
int acl_list_apply_cfg(struct acl_list* acl, struct config_file* cfg,
|
|
struct views* v);
|
|
|
|
/** compare ACL interface "addr_tree" nodes (+port) */
|
|
int acl_interface_compare(const void* k1, const void* k2);
|
|
|
|
/**
|
|
* Initialise (also clean) the acl_interface struct.
|
|
* @param acl_interface: where to store.
|
|
*/
|
|
void acl_interface_init(struct acl_list* acl_interface);
|
|
|
|
/**
|
|
* Process interface control config.
|
|
* @param acl_interface: where to store.
|
|
* @param cfg: config options.
|
|
* @param v: views structure
|
|
* @return 0 on error.
|
|
*/
|
|
int acl_interface_apply_cfg(struct acl_list* acl_interface, struct config_file* cfg,
|
|
struct views* v);
|
|
|
|
/**
|
|
* Lookup access control status for acl structure.
|
|
* @param acl: structure for acl storage.
|
|
* @return: what to do with message from this address.
|
|
*/
|
|
enum acl_access acl_get_control(struct acl_addr* acl);
|
|
|
|
/**
|
|
* Lookup address to see its acl structure
|
|
* @param acl: structure for address storage.
|
|
* @param addr: address to check
|
|
* @param addrlen: length of addr.
|
|
* @return: acl structure from this address.
|
|
*/
|
|
struct acl_addr*
|
|
acl_addr_lookup(struct acl_list* acl, struct sockaddr_storage* addr,
|
|
socklen_t addrlen);
|
|
|
|
/**
|
|
* Get memory used by acl structure.
|
|
* @param acl: structure for address storage.
|
|
* @return bytes in use.
|
|
*/
|
|
size_t acl_list_get_mem(struct acl_list* acl);
|
|
|
|
/*
|
|
* Get string for acl access specification
|
|
* @param acl: access type value
|
|
* @return string
|
|
*/
|
|
const char* acl_access_to_str(enum acl_access acl);
|
|
|
|
/* log acl and addr for action */
|
|
void log_acl_action(const char* action, struct sockaddr_storage* addr,
|
|
socklen_t addrlen, enum acl_access acl, struct acl_addr* acladdr);
|
|
|
|
#endif /* DAEMON_ACL_LIST_H */
|