1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <sys/stat.h>
#include "sd-event.h"
#include "sd-netlink.h"
#include "sd-network.h"
#include "hashmap.h"
#include "list.h"
#include "ordered-set.h"
#include "resolve-util.h"
#include "varlink.h"
typedef struct Manager Manager;
#include "resolved-dns-query.h"
#include "resolved-dns-search-domain.h"
#include "resolved-dns-stream.h"
#include "resolved-dns-stub.h"
#include "resolved-dns-trust-anchor.h"
#include "resolved-link.h"
#include "resolved-socket-graveyard.h"
#define MANAGER_SEARCH_DOMAINS_MAX 256
#define MANAGER_DNS_SERVERS_MAX 256
typedef struct EtcHosts {
Hashmap *by_address;
Hashmap *by_name;
Set *no_address;
} EtcHosts;
struct Manager {
sd_event *event;
ResolveSupport llmnr_support;
ResolveSupport mdns_support;
DnssecMode dnssec_mode;
DnsOverTlsMode dns_over_tls_mode;
DnsCacheMode enable_cache;
bool cache_from_localhost;
DnsStubListenerMode dns_stub_listener_mode;
#if ENABLE_DNS_OVER_TLS
DnsTlsManagerData dnstls_data;
#endif
/* Network */
Hashmap *links;
sd_netlink *rtnl;
sd_event_source *rtnl_event_source;
sd_network_monitor *network_monitor;
sd_event_source *network_event_source;
/* DNS query management */
Hashmap *dns_transactions;
LIST_HEAD(DnsQuery, dns_queries);
unsigned n_dns_queries;
Hashmap *stub_queries_by_packet;
LIST_HEAD(DnsStream, dns_streams);
unsigned n_dns_streams[_DNS_STREAM_TYPE_MAX];
/* Unicast dns */
LIST_HEAD(DnsServer, dns_servers);
LIST_HEAD(DnsServer, fallback_dns_servers);
unsigned n_dns_servers; /* counts both main and fallback */
DnsServer *current_dns_server;
LIST_HEAD(DnsSearchDomain, search_domains);
unsigned n_search_domains;
bool need_builtin_fallbacks;
bool read_resolv_conf;
bool resolve_unicast_single_label;
struct stat resolv_conf_stat;
DnsTrustAnchor trust_anchor;
LIST_HEAD(DnsScope, dns_scopes);
DnsScope *unicast_scope;
/* LLMNR */
int llmnr_ipv4_udp_fd;
int llmnr_ipv6_udp_fd;
int llmnr_ipv4_tcp_fd;
int llmnr_ipv6_tcp_fd;
sd_event_source *llmnr_ipv4_udp_event_source;
sd_event_source *llmnr_ipv6_udp_event_source;
sd_event_source *llmnr_ipv4_tcp_event_source;
sd_event_source *llmnr_ipv6_tcp_event_source;
/* mDNS */
int mdns_ipv4_fd;
int mdns_ipv6_fd;
sd_event_source *mdns_ipv4_event_source;
sd_event_source *mdns_ipv6_event_source;
/* DNS-SD */
Hashmap *dnssd_services;
/* dbus */
sd_bus *bus;
/* The hostname we publish on LLMNR and mDNS */
char *full_hostname;
char *llmnr_hostname;
char *mdns_hostname;
DnsResourceKey *llmnr_host_ipv4_key;
DnsResourceKey *llmnr_host_ipv6_key;
DnsResourceKey *mdns_host_ipv4_key;
DnsResourceKey *mdns_host_ipv6_key;
/* Watch the system hostname */
int hostname_fd;
sd_event_source *hostname_event_source;
sd_event_source *sigusr1_event_source;
sd_event_source *sigusr2_event_source;
sd_event_source *sigrtmin1_event_source;
unsigned n_transactions_total;
unsigned n_dnssec_verdict[_DNSSEC_VERDICT_MAX];
/* Data from /etc/hosts */
EtcHosts etc_hosts;
usec_t etc_hosts_last;
struct stat etc_hosts_stat;
bool read_etc_hosts;
OrderedSet *dns_extra_stub_listeners;
/* Local DNS stub on 127.0.0.53:53 */
sd_event_source *dns_stub_udp_event_source;
sd_event_source *dns_stub_tcp_event_source;
Hashmap *polkit_registry;
VarlinkServer *varlink_server;
sd_event_source *clock_change_event_source;
LIST_HEAD(SocketGraveyard, socket_graveyard);
SocketGraveyard *socket_graveyard_oldest;
size_t n_socket_graveyard;
};
/* Manager */
int manager_new(Manager **ret);
Manager* manager_free(Manager *m);
int manager_start(Manager *m);
uint32_t manager_find_mtu(Manager *m);
int manager_write(Manager *m, int fd, DnsPacket *p);
int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *destination, uint16_t port, const union in_addr_union *source, DnsPacket *p);
int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
void manager_refresh_rrs(Manager *m);
int manager_next_hostname(Manager *m);
bool manager_packet_from_local_address(Manager *m, DnsPacket *p);
bool manager_packet_from_our_transaction(Manager *m, DnsPacket *p);
DnsScope* manager_find_scope(Manager *m, DnsPacket *p);
void manager_verify_all(Manager *m);
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
/* For some reason we need some extra cmsg space on some kernels/archs. One of those days we need to figure out why */
#define EXTRA_CMSG_SPACE 1024
int manager_is_own_hostname(Manager *m, const char *name);
int manager_compile_dns_servers(Manager *m, OrderedSet **servers);
int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route);
DnssecMode manager_get_dnssec_mode(Manager *m);
bool manager_dnssec_supported(Manager *m);
DnsOverTlsMode manager_get_dns_over_tls_mode(Manager *m);
void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key);
bool manager_routable(Manager *m);
void manager_flush_caches(Manager *m, int log_level);
void manager_reset_server_features(Manager *m);
void manager_cleanup_saved_user(Manager *m);
bool manager_next_dnssd_names(Manager *m);
bool manager_server_is_stub(Manager *m, DnsServer *s);
|
