1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2022 Felix Fietkau <nbd@nbd.name>
8 #include <sys/socket.h>
11 #include <libubox/avl-cmp.h>
12 #include <libubox/utils.h>
13 #include <libubox/blobmsg_json.h>
20 NETDATA_ATTR_SERVICES
,
24 static const struct blobmsg_policy netdata_policy
[__NETDATA_ATTR_MAX
] = {
25 [NETDATA_ATTR_CONFIG
] = { "config", BLOBMSG_TYPE_TABLE
},
26 [NETDATA_ATTR_HOSTS
] = { "hosts", BLOBMSG_TYPE_TABLE
},
27 [NETDATA_ATTR_SERVICES
] = { "services", BLOBMSG_TYPE_TABLE
},
33 NETCONF_ATTR_PEX_PORT
,
34 NETCONF_ATTR_KEEPALIVE
,
38 static const struct blobmsg_policy netconf_policy
[__NETCONF_ATTR_MAX
] = {
39 [NETCONF_ATTR_ID
] = { "id", BLOBMSG_TYPE_STRING
},
40 [NETCONF_ATTR_PORT
] = { "port", BLOBMSG_TYPE_INT32
},
41 [NETCONF_ATTR_PEX_PORT
] = { "peer-exchange-port", BLOBMSG_TYPE_INT32
},
42 [NETCONF_ATTR_KEEPALIVE
] = { "keepalive", BLOBMSG_TYPE_INT32
},
45 const struct blobmsg_policy network_policy
[__NETWORK_ATTR_MAX
] = {
46 [NETWORK_ATTR_NAME
] = { "name", BLOBMSG_TYPE_STRING
},
47 [NETWORK_ATTR_TYPE
] = { "type", BLOBMSG_TYPE_STRING
},
48 [NETWORK_ATTR_AUTH_KEY
] = { "auth_key", BLOBMSG_TYPE_STRING
},
49 [NETWORK_ATTR_KEY
] = { "key", BLOBMSG_TYPE_STRING
},
50 [NETWORK_ATTR_FILE
] = { "file", BLOBMSG_TYPE_STRING
},
51 [NETWORK_ATTR_DATA
] = { "data", BLOBMSG_TYPE_TABLE
},
52 [NETWORK_ATTR_INTERFACE
] = { "interface", BLOBMSG_TYPE_STRING
},
53 [NETWORK_ATTR_KEEPALIVE
] = { "keepalive", BLOBMSG_TYPE_INT32
},
54 [NETWORK_ATTR_DOMAIN
] = { "domain", BLOBMSG_TYPE_STRING
},
55 [NETWORK_ATTR_UPDATE_CMD
] = { "update-cmd", BLOBMSG_TYPE_STRING
},
56 [NETWORK_ATTR_TUNNELS
] = { "tunnels", BLOBMSG_TYPE_TABLE
},
57 [NETWORK_ATTR_AUTH_CONNECT
] = { "auth_connect", BLOBMSG_TYPE_ARRAY
},
58 [NETWORK_ATTR_PEER_DATA
] = { "peer_data", BLOBMSG_TYPE_ARRAY
},
61 AVL_TREE(networks
, avl_strcmp
, false, NULL
);
62 static struct blob_buf b
;
64 static void network_load_config_data(struct network
*net
, struct blob_attr
*data
)
66 struct blob_attr
*tb
[__NETCONF_ATTR_MAX
];
67 struct blob_attr
*cur
;
68 siphash_key_t key
= {};
70 blobmsg_parse(netconf_policy
, __NETCONF_ATTR_MAX
, tb
,
71 blobmsg_data(data
), blobmsg_len(data
));
73 if ((cur
= tb
[NETCONF_ATTR_PORT
]) != NULL
)
74 net
->net_config
.port
= blobmsg_get_u32(cur
);
76 net
->net_config
.port
= 51820;
78 if ((cur
= tb
[NETCONF_ATTR_PEX_PORT
]) != NULL
)
79 net
->net_config
.pex_port
= blobmsg_get_u32(cur
);
81 if ((cur
= tb
[NETCONF_ATTR_ID
]) != NULL
) {
82 const char *id
= blobmsg_get_string(cur
);
83 siphash_to_le64(&net
->net_config
.addr
.network_id
, id
, strlen(id
), &key
);
85 siphash_to_le64(&net
->net_config
.addr
.network_id
, &net
->net_config
.port
,
86 sizeof(net
->net_config
.port
), &key
);
89 net
->net_config
.addr
.network_id
[0] = 0xfd;
90 network_fill_host_addr(&net
->net_config
.addr
, net
->config
.pubkey
);
92 if (net
->config
.keepalive
>= 0)
93 net
->net_config
.keepalive
= net
->config
.keepalive
;
94 else if ((cur
= tb
[NETCONF_ATTR_KEEPALIVE
]) != NULL
)
95 net
->net_config
.keepalive
= blobmsg_get_u32(cur
);
97 net
->net_config
.keepalive
= 0;
100 static int network_load_data(struct network
*net
, struct blob_attr
*data
)
102 struct blob_attr
*tb
[__NETDATA_ATTR_MAX
];
103 siphash_key_t key
= {};
105 net
->net_config
.hash
= siphash(data
, blob_raw_len(data
), &key
);
106 blobmsg_parse(netdata_policy
, __NETDATA_ATTR_MAX
, tb
,
107 blobmsg_data(data
), blobmsg_len(data
));
109 network_load_config_data(net
, tb
[NETDATA_ATTR_CONFIG
]);
110 network_hosts_add(net
, tb
[NETDATA_ATTR_HOSTS
]);
111 network_services_add(net
, tb
[NETDATA_ATTR_SERVICES
]);
116 static int network_load_file(struct network
*net
)
118 blob_buf_init(&b
, 0);
120 if (!blobmsg_add_json_from_file(&b
, net
->config
.file
))
123 return network_load_data(net
, b
.head
);
126 static int network_load_dynamic(struct network
*net
)
128 const char *json
= NULL
;
134 if (asprintf(&fname
, "%s/%s.bin", data_dir
, network_name(net
)) < 0)
137 f
= fopen(fname
, "r");
141 D_NET(net
, "failed to open %s/%s.bin\n", data_dir
, network_name(net
));
145 if (fstat(fileno(f
), &st
) < 0)
148 net
->net_data_len
= st
.st_size
;
149 net
->net_data
= realloc(net
->net_data
, net
->net_data_len
+ 1);
150 memset(net
->net_data
+ net
->net_data_len
, 0, 1);
151 if (fread(net
->net_data
, 1, net
->net_data_len
, f
) != net
->net_data_len
||
152 unet_auth_data_validate(net
->config
.auth_key
, net
->net_data
,
153 net
->net_data_len
, &net
->net_data_version
, &json
)) {
154 net
->net_data_len
= 0;
159 blob_buf_init(&b
, 0);
160 if (!blobmsg_add_json_from_string(&b
, json
)) {
161 net
->net_data_len
= 0;
165 return network_load_data(net
, b
.head
);
172 int network_save_dynamic(struct network
*net
)
174 char *fname
= NULL
, *fname2
;
179 if (net
->config
.type
!= NETWORK_TYPE_DYNAMIC
||
183 if (asprintf(&fname
, "%s/%s.bin.XXXXXXXX", data_dir
, network_name(net
)) < 0)
196 len
= fwrite(net
->net_data
, 1, net
->net_data_len
, f
);
201 if (len
!= net
->net_data_len
)
204 fname2
= strdup(fname
);
205 *strrchr(fname2
, '.') = 0;
206 ret
= rename(fname
, fname2
);
222 network_fill_ip(struct blob_buf
*buf
, int af
, union network_addr
*addr
, int mask
)
227 c
= blobmsg_open_table(buf
, NULL
);
229 blobmsg_printf(buf
, "mask", "%d", mask
);
231 str
= blobmsg_alloc_string_buffer(buf
, "ipaddr", INET6_ADDRSTRLEN
);
232 inet_ntop(af
, addr
, str
, INET6_ADDRSTRLEN
);
233 blobmsg_add_string_buffer(buf
);
235 blobmsg_close_table(buf
, c
);
239 network_fill_ipaddr_list(struct network_host
*host
, struct blob_buf
*b
, bool ipv6
)
241 union network_addr addr
= {};
242 struct blob_attr
*cur
;
247 af
= ipv6
? AF_INET6
: AF_INET
;
248 blobmsg_for_each_attr(cur
, host
->peer
.ipaddr
, rem
) {
249 const char *str
= blobmsg_get_string(cur
);
251 if (!!strchr(str
, ':') != ipv6
)
254 if (inet_pton(af
, str
, &addr
) != 1)
257 c
= blobmsg_open_table(b
, NULL
);
258 blobmsg_add_string(b
, "ipaddr", str
);
259 blobmsg_add_string(b
, "mask", ipv6
? "128" : "32");
260 blobmsg_close_table(b
, c
);
265 network_fill_ip_settings(struct network
*net
, struct blob_buf
*buf
)
267 struct network_host
*host
= net
->net_config
.local_host
;
270 c
= blobmsg_open_array(buf
, "ipaddr");
271 network_fill_ipaddr_list(host
, buf
, false);
272 blobmsg_close_array(buf
, c
);
274 c
= blobmsg_open_array(buf
, "ip6addr");
275 network_fill_ip(buf
, AF_INET6
, &host
->peer
.local_addr
, 64);
276 network_fill_ipaddr_list(host
, buf
, true);
277 blobmsg_close_array(buf
, c
);
281 __network_fill_host_subnets(struct network_host
*host
, struct blob_buf
*b
, bool ipv6
)
283 union network_addr addr
= {};
284 struct blob_attr
*cur
;
290 af
= ipv6
? AF_INET6
: AF_INET
;
291 blobmsg_for_each_attr(cur
, host
->peer
.subnet
, rem
) {
292 const char *str
= blobmsg_get_string(cur
);
295 if (!!strchr(str
, ':') != ipv6
)
298 if (network_get_subnet(af
, &addr
, &mask
, str
))
301 c
= blobmsg_open_table(b
, NULL
);
303 buf
= blobmsg_alloc_string_buffer(b
, "target", INET6_ADDRSTRLEN
);
304 inet_ntop(af
, &addr
, buf
, INET6_ADDRSTRLEN
);
305 blobmsg_add_string_buffer(b
);
307 blobmsg_printf(b
, "netmask", "%d", mask
);
309 blobmsg_close_table(b
, c
);
312 blobmsg_for_each_attr(cur
, host
->peer
.ipaddr
, rem
) {
313 const char *str
= blobmsg_get_string(cur
);
315 if (!!strchr(str
, ':') != ipv6
)
318 if (inet_pton(af
, str
, &addr
) != 1)
321 c
= blobmsg_open_table(b
, NULL
);
322 blobmsg_add_string(b
, "target", str
);
323 blobmsg_add_string(b
, "netmask", ipv6
? "128" : "32");
324 blobmsg_close_table(b
, c
);
329 __network_fill_subnets(struct network
*net
, struct blob_buf
*buf
, bool ipv6
)
331 struct network_host
*host
;
334 c
= blobmsg_open_array(buf
, ipv6
? "routes6": "routes");
335 avl_for_each_element(&net
->hosts
, host
, node
) {
336 if (host
== net
->net_config
.local_host
)
338 __network_fill_host_subnets(host
, buf
, ipv6
);
340 blobmsg_close_array(buf
, c
);
345 network_fill_subnets(struct network
*net
, struct blob_buf
*buf
)
347 __network_fill_subnets(net
, buf
, false);
348 __network_fill_subnets(net
, buf
, true);
352 network_do_update(struct network
*net
, bool up
)
354 if (!net
->net_config
.local_host
)
357 blob_buf_init(&b
, 0);
358 blobmsg_add_u32(&b
, "action", 0);
359 blobmsg_add_string(&b
, "ifname", network_name(net
));
360 blobmsg_add_u8(&b
, "link-up", up
);
363 network_fill_ip_settings(net
, &b
);
364 network_fill_subnets(net
, &b
);
368 char *s
= blobmsg_format_json(b
.head
, true);
369 D_NET(net
, "update: %s", s
);
373 if (net
->config
.update_cmd
) {
374 const char *argv
[] = { net
->config
.update_cmd
, NULL
, NULL
};
379 argv
[1] = blobmsg_format_json(b
.head
, true);
380 execvp(argv
[0], (char **)argv
);
383 waitpid(pid
, &stat
, 0);
386 if (!net
->config
.interface
)
389 blobmsg_add_string(&b
, "interface", net
->config
.interface
);
390 unetd_ubus_netifd_update(b
.head
);
393 static void network_reload(struct uloop_timeout
*t
)
395 struct network
*net
= container_of(t
, struct network
, reload_timer
);
397 net
->prev_local_host
= net
->net_config
.local_host
;
399 memset(&net
->net_config
, 0, sizeof(net
->net_config
));
401 network_pex_close(net
);
402 network_services_free(net
);
403 network_hosts_update_start(net
);
404 network_services_update_start(net
);
406 switch (net
->config
.type
) {
407 case NETWORK_TYPE_FILE
:
408 network_load_file(net
);
410 case NETWORK_TYPE_INLINE
:
411 network_load_data(net
, net
->config
.net_data
);
413 case NETWORK_TYPE_DYNAMIC
:
414 network_load_dynamic(net
);
418 network_services_update_done(net
);
419 network_hosts_update_done(net
);
420 uloop_timeout_set(&net
->connect_timer
, 10);
422 net
->prev_local_host
= NULL
;
425 network_do_update(net
, true);
426 network_pex_open(net
);
429 void network_soft_reload(struct network
*net
)
431 siphash_key_t key
= {};
434 if (net
->config
.type
== NETWORK_TYPE_FILE
) {
435 blob_buf_init(&b
, 0);
437 if (!blobmsg_add_json_from_file(&b
, net
->config
.file
))
440 hash
= siphash(b
.head
, blob_raw_len(b
.head
), &key
);
441 if (hash
!= net
->net_config
.hash
) {
442 uloop_timeout_set(&net
->reload_timer
, 1);
447 network_hosts_reload_dynamic_peers(net
);
450 static int network_setup(struct network
*net
)
452 if (wg_init_network(net
)) {
453 fprintf(stderr
, "Setup failed for network %s\n", network_name(net
));
457 net
->ifindex
= if_nametoindex(network_name(net
));
459 fprintf(stderr
, "Could not get ifindex for network %s\n", network_name(net
));
466 static void network_teardown(struct network
*net
)
468 uloop_timeout_cancel(&net
->connect_timer
);
469 uloop_timeout_cancel(&net
->reload_timer
);
470 network_do_update(net
, false);
471 network_pex_close(net
);
472 network_pex_free(net
);
473 network_hosts_free(net
);
474 network_services_free(net
);
475 wg_cleanup_network(net
);
479 network_destroy(struct network
*net
)
481 network_teardown(net
);
482 avl_delete(&networks
, &net
->node
);
484 free(net
->config
.data
);
489 network_set_config(struct network
*net
, struct blob_attr
*config
)
491 struct blob_attr
*tb
[__NETWORK_ATTR_MAX
];
492 struct blob_attr
*cur
;
494 if (net
->config
.data
&& blob_attr_equal(net
->config
.data
, config
))
497 network_teardown(net
);
499 free(net
->config
.data
);
500 memset(&net
->config
, 0, sizeof(net
->config
));
502 net
->config
.data
= blob_memdup(config
);
503 blobmsg_parse(network_policy
, __NETWORK_ATTR_MAX
, tb
,
504 blobmsg_data(net
->config
.data
),
505 blobmsg_len(net
->config
.data
));
507 if ((cur
= tb
[NETWORK_ATTR_TYPE
]) == NULL
||
508 !strlen(blobmsg_get_string(cur
)) ||
509 !strcmp(blobmsg_get_string(cur
), "dynamic"))
510 net
->config
.type
= NETWORK_TYPE_DYNAMIC
;
511 else if (!strcmp(blobmsg_get_string(cur
), "file"))
512 net
->config
.type
= NETWORK_TYPE_FILE
;
513 else if (!strcmp(blobmsg_get_string(cur
), "inline"))
514 net
->config
.type
= NETWORK_TYPE_INLINE
;
518 if ((cur
= tb
[NETWORK_ATTR_KEEPALIVE
]) != NULL
)
519 net
->config
.keepalive
= blobmsg_get_u32(cur
);
521 net
->config
.keepalive
= -1;
523 switch (net
->config
.type
) {
524 case NETWORK_TYPE_FILE
:
525 if ((cur
= tb
[NETWORK_ATTR_FILE
]) != NULL
)
526 net
->config
.file
= blobmsg_get_string(cur
);
530 case NETWORK_TYPE_INLINE
:
531 net
->config
.net_data
= tb
[NETWORK_ATTR_DATA
];
532 if (!net
->config
.net_data
)
535 case NETWORK_TYPE_DYNAMIC
:
536 if ((cur
= tb
[NETWORK_ATTR_AUTH_KEY
]) == NULL
)
539 if (b64_decode(blobmsg_get_string(cur
), net
->config
.auth_key
,
540 sizeof(net
->config
.auth_key
)) != sizeof(net
->config
.auth_key
))
545 if ((cur
= tb
[NETWORK_ATTR_INTERFACE
]) != NULL
&&
546 strlen(blobmsg_get_string(cur
)) > 0)
547 net
->config
.interface
= blobmsg_get_string(cur
);
549 if ((cur
= tb
[NETWORK_ATTR_UPDATE_CMD
]) != NULL
&&
550 strlen(blobmsg_get_string(cur
)) > 0)
551 net
->config
.update_cmd
= blobmsg_get_string(cur
);
553 if ((cur
= tb
[NETWORK_ATTR_DOMAIN
]) != NULL
&&
554 strlen(blobmsg_get_string(cur
)) > 0)
555 net
->config
.domain
= blobmsg_get_string(cur
);
557 if ((cur
= tb
[NETWORK_ATTR_TUNNELS
]) != NULL
)
558 net
->config
.tunnels
= cur
;
560 if ((cur
= tb
[NETWORK_ATTR_AUTH_CONNECT
]) != NULL
&&
561 blobmsg_check_array(cur
, BLOBMSG_TYPE_STRING
) > 0)
562 net
->config
.auth_connect
= cur
;
564 if ((cur
= tb
[NETWORK_ATTR_PEER_DATA
]) != NULL
&&
565 blobmsg_check_array(cur
, BLOBMSG_TYPE_STRING
) > 0)
566 net
->config
.peer_data
= cur
;
568 if ((cur
= tb
[NETWORK_ATTR_KEY
]) == NULL
)
571 if (b64_decode(blobmsg_get_string(cur
), net
->config
.key
, sizeof(net
->config
.key
)) !=
572 sizeof(net
->config
.key
))
575 curve25519_generate_public(net
->config
.pubkey
, net
->config
.key
);
577 if (network_setup(net
))
581 network_reload(&net
->reload_timer
);
586 network_destroy(net
);
590 static struct network
*
591 network_alloc(const char *name
)
596 net
= calloc_a(sizeof(*net
), &name_buf
, strlen(name
) + 1);
597 net
->node
.key
= strcpy(name_buf
, name
);
598 net
->reload_timer
.cb
= network_reload
;
599 avl_insert(&networks
, &net
->node
);
601 network_pex_init(net
);
602 network_hosts_init(net
);
603 network_services_init(net
);
608 void network_fill_host_addr(union network_addr
*addr
, uint8_t *pubkey
)
610 siphash_key_t key
= {
612 get_unaligned_le64(addr
->network_id
),
613 get_unaligned_le64(addr
->network_id
)
617 siphash_to_le64(&addr
->host_addr
, pubkey
, CURVE25519_KEY_SIZE
, &key
);
620 int unetd_network_add(const char *name
, struct blob_attr
*config
)
624 if (strchr(name
, '/'))
627 net
= avl_find_element(&networks
, name
, net
, node
);
629 net
= network_alloc(name
);
631 return network_set_config(net
, config
);
634 int unetd_network_remove(const char *name
)
638 net
= avl_find_element(&networks
, name
, net
, node
);
642 network_destroy(net
);
647 void network_free_all(void)
649 struct network
*net
, *tmp
;
651 avl_for_each_element_safe(&networks
, net
, node
, tmp
)
652 network_destroy(net
);