summaryrefslogtreecommitdiff
path: root/src/resolve/resolved-manager.h
blob: 4e70a5b500526d3a060152b3a2410873d404e1f0 (plain)
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
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#pragma once

/***
  This file is part of systemd.

  Copyright 2014 Tom Gundersen <teg@jklm.no>

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include "sd-event.h"
#include "sd-network.h"
#include "sd-netlink.h"
#include "list.h"
#include "hashmap.h"

typedef struct Manager Manager;
typedef enum Support Support;

enum Support {
        SUPPORT_NO,
        SUPPORT_YES,
        SUPPORT_RESOLVE,
        _SUPPORT_MAX,
        _SUPPORT_INVALID = -1
};

#include "resolved-dns-query.h"
#include "resolved-dns-stream.h"
#include "resolved-link.h"

struct Manager {
        sd_event *event;

        Support llmnr_support;

        /* 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;

        LIST_HEAD(DnsStream, dns_streams);
        unsigned n_dns_streams;

        /* Unicast dns */
        int dns_ipv4_fd;
        int dns_ipv6_fd;

        sd_event_source *dns_ipv4_event_source;
        sd_event_source *dns_ipv6_event_source;

        LIST_HEAD(DnsServer, dns_servers);
        LIST_HEAD(DnsServer, fallback_dns_servers);
        DnsServer *current_dns_server;

        bool read_resolv_conf;
        usec_t resolv_conf_mtime;

        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;

        /* dbus */
        sd_bus *bus;
        sd_event_source *bus_retry_event_source;

        /* The hostname we publish on LLMNR and mDNS */
        char *hostname;
        DnsResourceKey *host_ipv4_key;
        DnsResourceKey *host_ipv6_key;

        /* Watch the system hostname */
        int hostname_fd;
        sd_event_source *hostname_event_source;

        /* Watch for system suspends */
        sd_bus_slot *prepare_for_sleep_slot;
};

/* Manager */

int manager_new(Manager **ret);
Manager* manager_free(Manager *m);

int manager_start(Manager *m);
int manager_read_resolv_conf(Manager *m);
int manager_write_resolv_conf(Manager *m);

DnsServer *manager_set_dns_server(Manager *m, DnsServer *s);
DnsServer *manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr);
DnsServer *manager_get_dns_server(Manager *m);
void manager_next_dns_server(Manager *m);

uint32_t manager_find_mtu(Manager *m);

int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);

int manager_dns_ipv4_fd(Manager *m);
int manager_dns_ipv6_fd(Manager *m);

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_our_packet(Manager *m, DnsPacket *p);
DnsScope* manager_find_scope(Manager *m, DnsPacket *p);

void manager_verify_all(Manager *m);

void manager_flush_dns_servers(Manager *m, DnsServerType t);

DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);

#define EXTRA_CMSG_SPACE 1024

const char* support_to_string(Support p) _const_;
int support_from_string(const char *s) _pure_;