sbin/unwind/unwind.h

1 /* $OpenBSD: unwind.h,v 1.58 2025年09月15日 08:43:51 florian Exp $ */
2
3 /*
4 * Copyright (c) 2018 Florian Obser <florian@openbsd.org>
5 * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
6 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21#include <sys/types.h>
22#include <sys/tree.h>
23#include <netinet/in.h> /* INET6_ADDRSTRLEN */
24#include <event.h>
25#include <imsg.h>
26#include <netdb.h> /* NI_MAXHOST */
27#include <stdint.h>
28
29#ifndef nitems
30#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
31#endif
32
33#define _PATH_CONF_FILE "/etc/unwind.conf"
34#define _PATH_UNWIND_SOCKET "/dev/unwind.sock"
35#define UNWIND_USER "_unwind"
36
37#define OPT_VERBOSE 0x00000001
38#define OPT_VERBOSE2 0x00000002
39#define OPT_VERBOSE3 0x00000004
40#define OPT_NOACTION 0x00000008
41
42#define ROOT_DNSKEY_TTL 172800 /* TTL from authority */
43#define KSK2017 ". IN DS 20326 8 2 E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D"
44#define KSK2024 ". IN DS 38696 8 2 683D2D0ACB8C9B712A1948B27F741219298D0A450D612C483AF444A4C0FB2B16"
45
46#define IMSG_DATA_SIZE(imsg) ((imsg).hdr.len - IMSG_HEADER_SIZE)
47
48 enum uw_resolver_type {
49 UW_RES_RECURSOR,
50 UW_RES_AUTOCONF,
51 UW_RES_ODOT_AUTOCONF,
52 UW_RES_ASR,
53 UW_RES_FORWARDER,
54 UW_RES_ODOT_FORWARDER,
55 UW_RES_DOT,
56 UW_RES_NONE
57};
58
59 static const char * const uw_resolver_type_str[] = {
60 "recursor",
61 "autoconf",
62 "oDoT-autoconf",
63 "stub",
64 "forwarder",
65 "oDoT-forwarder",
66 "DoT"
67};
68
69 static const char * const uw_resolver_type_short[] = {
70 "rec",
71 "auto",
72 "auto*",
73 "stub",
74 "forw",
75 "forw*",
76 "DoT"
77};
78
79 struct imsgev {
80 struct imsgbuf ibuf;
81 void (*handler)(int, short, void *);
82 struct event ev;
83 short events;
84};
85
86 enum imsg_type {
87 IMSG_NONE,
88 IMSG_CTL_LOG_VERBOSE,
89 IMSG_CTL_RELOAD,
90 IMSG_CTL_STATUS,
91 IMSG_CTL_AUTOCONF,
92 IMSG_CTL_MEM,
93 IMSG_RECONF_CONF,
94 IMSG_RECONF_BLOCKLIST_FILE,
95 IMSG_RECONF_FORWARDER,
96 IMSG_RECONF_DOT_FORWARDER,
97 IMSG_RECONF_FORCE,
98 IMSG_RECONF_END,
99 IMSG_UDP4SOCK,
100 IMSG_UDP6SOCK,
101 IMSG_TCP4SOCK,
102 IMSG_TCP6SOCK,
103 IMSG_ROUTESOCK,
104 IMSG_CONTROLFD,
105 IMSG_STARTUP,
106 IMSG_STARTUP_DONE,
107 IMSG_SOCKET_IPC_FRONTEND,
108 IMSG_SOCKET_IPC_RESOLVER,
109 IMSG_QUERY,
110 IMSG_ANSWER,
111 IMSG_CTL_RESOLVER_INFO,
112 IMSG_CTL_AUTOCONF_RESOLVER_INFO,
113 IMSG_CTL_MEM_INFO,
114 IMSG_CTL_END,
115 IMSG_HTTPSOCK,
116 IMSG_TAFD,
117 IMSG_NEW_TA,
118 IMSG_NEW_TAS_ABORT,
119 IMSG_NEW_TAS_DONE,
120 IMSG_NETWORK_CHANGED,
121 IMSG_BLFD,
122 IMSG_REPLACE_DNS,
123 IMSG_NEW_DNS64_PREFIXES_START,
124 IMSG_NEW_DNS64_PREFIX,
125 IMSG_NEW_DNS64_PREFIXES_DONE,
126 IMSG_CHANGE_AFS,
127};
128
129 struct uw_forwarder {
130 TAILQ_ENTRY(uw_forwarder) entry;
131 char ip[INET6_ADDRSTRLEN];
132 char auth_name[NI_MAXHOST];
133 uint16_t port;
134 uint32_t if_index;
135 int src;
136};
137
138 struct force_tree_entry {
139 RB_ENTRY(force_tree_entry) entry;
140 char domain[NI_MAXHOST];
141 enum uw_resolver_type type;
142 int acceptbogus;
143};
144
145 RB_HEAD(force_tree, force_tree_entry);
146
147 struct resolver_preference {
148 enum uw_resolver_type types[UW_RES_NONE];
149 int len;
150};
151
152 TAILQ_HEAD(uw_forwarder_head, uw_forwarder);
153 struct uw_conf {
154 struct uw_forwarder_head uw_forwarder_list;
155 struct uw_forwarder_head uw_dot_forwarder_list;
156 struct force_tree force;
157 struct resolver_preference res_pref;
158 int enabled_resolvers[UW_RES_NONE];
159 int force_resolvers[UW_RES_NONE];
160 char *blocklist_file;
161 int blocklist_log;
162};
163
164 struct query_imsg {
165 uint64_t id;
166 char qname[NI_MAXHOST];
167 int t;
168 int c;
169 struct timespec tp;
170};
171
172 struct answer_header {
173 uint64_t id;
174 int srvfail;
175 int bogus;
176 int answer_len;
177};
178
179 extern uint32_t cmd_opts;
180
181 /* unwind.c */
182 void main_imsg_compose_frontend(int, pid_t, void *, uint16_t);
183 void main_imsg_compose_frontend_fd(int, pid_t, int);
184 void main_imsg_compose_resolver(int, pid_t, void *, uint16_t);
185 void merge_config(struct uw_conf *, struct uw_conf *);
186 void imsg_event_add(struct imsgev *);
187 int imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t,
188 int, void *, uint16_t);
189 void imsg_receive_config(struct imsg *, struct uw_conf **);
190
191 struct uw_conf *config_new_empty(void);
192 void config_clear(struct uw_conf *);
193
194 /* printconf.c */
195 void print_config(struct uw_conf *);
196
197 /* parse.y */
198 struct uw_conf *parse_config(char *);
199 int cmdline_symset(char *);
200
201 RB_PROTOTYPE(force_tree, force_tree_entry, entry, force_tree_cmp);
202