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/* $OpenBSD: unwind.h,v 1.57 2024/08/09 19:43:26 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];
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);
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