unwind.h

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Author : florian
Date : 2025-09-15 08:43:51
Hash : ac60b447
Message : Disable aggressive-nsec when "force" is in use. When resolution of a domain is forced to a resolver type, the resolver might have an nsec chain in its cache that proofs the non-existence of the domain. With aggressive-nsec enabled (the default in unbound), the query will then not be forwarded and resolution fails, even if "accept bogus" is configured. For example, if one squats on the undelegated tld "foobar": force forwarder { foobar } and then typo's it as foobaa: foo. 86400 IN NSEC food. NS DS RRSIG NSEC Problem reported by, testing & OK tb Suggestion to turn off aggressive-nsec by otto

sbin/unwind/unwind.h

/*	$OpenBSD: unwind.h,v 1.58 2025/09/15 08:43:51 florian Exp $	*/

/*
 * Copyright (c) 2018 Florian Obser <florian@openbsd.org>
 * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/tree.h>
#include <netinet/in.h>	/* INET6_ADDRSTRLEN */
#include <event.h>
#include <imsg.h>
#include <netdb.h>	/* NI_MAXHOST */
#include <stdint.h>

#ifndef nitems
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif

#define _PATH_CONF_FILE		"/etc/unwind.conf"
#define	_PATH_UNWIND_SOCKET	"/dev/unwind.sock"
#define UNWIND_USER		"_unwind"

#define OPT_VERBOSE	0x00000001
#define OPT_VERBOSE2	0x00000002
#define OPT_VERBOSE3	0x00000004
#define OPT_NOACTION	0x00000008

#define	ROOT_DNSKEY_TTL	172800	/* TTL from authority */
#define	KSK2017		".	IN	DS	20326 8 2 E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D"
#define	KSK2024		". 	IN	DS	38696 8 2 683D2D0ACB8C9B712A1948B27F741219298D0A450D612C483AF444A4C0FB2B16"

#define	IMSG_DATA_SIZE(imsg)	((imsg).hdr.len - IMSG_HEADER_SIZE)

enum uw_resolver_type {
	UW_RES_RECURSOR,
	UW_RES_AUTOCONF,
	UW_RES_ODOT_AUTOCONF,
	UW_RES_ASR,
	UW_RES_FORWARDER,
	UW_RES_ODOT_FORWARDER,
	UW_RES_DOT,
	UW_RES_NONE
};

static const char * const	uw_resolver_type_str[] = {
	"recursor",
	"autoconf",
	"oDoT-autoconf",
	"stub",
	"forwarder",
	"oDoT-forwarder",
	"DoT"
};

static const char * const	uw_resolver_type_short[] = {
	"rec",
	"auto",
	"auto*",
	"stub",
	"forw",
	"forw*",
	"DoT"
};

struct imsgev {
	struct imsgbuf	 ibuf;
	void		(*handler)(int, short, void *);
	struct event	 ev;
	short		 events;
};

enum imsg_type {
	IMSG_NONE,
	IMSG_CTL_LOG_VERBOSE,
	IMSG_CTL_RELOAD,
	IMSG_CTL_STATUS,
	IMSG_CTL_AUTOCONF,
	IMSG_CTL_MEM,
	IMSG_RECONF_CONF,
	IMSG_RECONF_BLOCKLIST_FILE,
	IMSG_RECONF_FORWARDER,
	IMSG_RECONF_DOT_FORWARDER,
	IMSG_RECONF_FORCE,
	IMSG_RECONF_END,
	IMSG_UDP4SOCK,
	IMSG_UDP6SOCK,
	IMSG_TCP4SOCK,
	IMSG_TCP6SOCK,
	IMSG_ROUTESOCK,
	IMSG_CONTROLFD,
	IMSG_STARTUP,
	IMSG_STARTUP_DONE,
	IMSG_SOCKET_IPC_FRONTEND,
	IMSG_SOCKET_IPC_RESOLVER,
	IMSG_QUERY,
	IMSG_ANSWER,
	IMSG_CTL_RESOLVER_INFO,
	IMSG_CTL_AUTOCONF_RESOLVER_INFO,
	IMSG_CTL_MEM_INFO,
	IMSG_CTL_END,
	IMSG_HTTPSOCK,
	IMSG_TAFD,
	IMSG_NEW_TA,
	IMSG_NEW_TAS_ABORT,
	IMSG_NEW_TAS_DONE,
	IMSG_NETWORK_CHANGED,
	IMSG_BLFD,
	IMSG_REPLACE_DNS,
	IMSG_NEW_DNS64_PREFIXES_START,
	IMSG_NEW_DNS64_PREFIX,
	IMSG_NEW_DNS64_PREFIXES_DONE,
	IMSG_CHANGE_AFS,
};

struct uw_forwarder {
	TAILQ_ENTRY(uw_forwarder)		 entry;
	char					 ip[INET6_ADDRSTRLEN];
	char					 auth_name[NI_MAXHOST];
	uint16_t				 port;
	uint32_t				 if_index;
	int					 src;
};

struct force_tree_entry {
	RB_ENTRY(force_tree_entry)	 entry;
	char				 domain[NI_MAXHOST];
	enum uw_resolver_type		 type;
	int				 acceptbogus;
};

RB_HEAD(force_tree, force_tree_entry);

struct resolver_preference {
	enum uw_resolver_type			 types[UW_RES_NONE];
	int					 len;
};

TAILQ_HEAD(uw_forwarder_head, uw_forwarder);
struct uw_conf {
	struct uw_forwarder_head	 uw_forwarder_list;
	struct uw_forwarder_head	 uw_dot_forwarder_list;
	struct force_tree		 force;
	struct resolver_preference	 res_pref;
	int				 enabled_resolvers[UW_RES_NONE];
	int				 force_resolvers[UW_RES_NONE];
	char				*blocklist_file;
	int				 blocklist_log;
};

struct query_imsg {
	uint64_t	 id;
	char		 qname[NI_MAXHOST];
	int		 t;
	int		 c;
	struct timespec	 tp;
};

struct answer_header {
	uint64_t id;
	int	 srvfail;
	int	 bogus;
	int	 answer_len;
};

extern uint32_t	 cmd_opts;

/* unwind.c */
void	main_imsg_compose_frontend(int, pid_t, void *, uint16_t);
void	main_imsg_compose_frontend_fd(int, pid_t, int);
void	main_imsg_compose_resolver(int, pid_t, void *, uint16_t);
void	merge_config(struct uw_conf *, struct uw_conf *);
void	imsg_event_add(struct imsgev *);
int	imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t,
	    int, void *, uint16_t);
void	imsg_receive_config(struct imsg *, struct uw_conf **);

struct uw_conf	*config_new_empty(void);
void		 config_clear(struct uw_conf *);

/* printconf.c */
void	print_config(struct uw_conf *);

/* parse.y */
struct uw_conf	*parse_config(char *);
int		 cmdline_symset(char *);

RB_PROTOTYPE(force_tree, force_tree_entry, entry, force_tree_cmp);

IABSD.fr/src/sbin/unwind/unwind.h

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IABSD.fr/src /sbin/unwind/unwind.h