1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2022 Felix Fietkau <nbd@nbd.name>
7 #include <sys/socket.h>
10 #include <libubox/avl-cmp.h>
11 #include <libubox/utils.h>
12 #include <libubox/blobmsg_json.h>
19 NETDATA_ATTR_SERVICES
,
23 static const struct blobmsg_policy netdata_policy
[__NETDATA_ATTR_MAX
] = {
24 [NETDATA_ATTR_CONFIG
] = { "config", BLOBMSG_TYPE_TABLE
},
25 [NETDATA_ATTR_HOSTS
] = { "hosts", BLOBMSG_TYPE_TABLE
},
26 [NETDATA_ATTR_SERVICES
] = { "services", BLOBMSG_TYPE_TABLE
},
32 NETCONF_ATTR_PEX_PORT
,
33 NETCONF_ATTR_KEEPALIVE
,
37 static const struct blobmsg_policy netconf_policy
[__NETCONF_ATTR_MAX
] = {
38 [NETCONF_ATTR_ID
] = { "id", BLOBMSG_TYPE_STRING
},
39 [NETCONF_ATTR_PORT
] = { "port", BLOBMSG_TYPE_INT32
},
40 [NETCONF_ATTR_PEX_PORT
] = { "peer-exchange-port", BLOBMSG_TYPE_INT32
},
41 [NETCONF_ATTR_KEEPALIVE
] = { "keepalive", BLOBMSG_TYPE_INT32
},
44 const struct blobmsg_policy network_policy
[__NETWORK_ATTR_MAX
] = {
45 [NETWORK_ATTR_NAME
] = { "name", BLOBMSG_TYPE_STRING
},
46 [NETWORK_ATTR_TYPE
] = { "type", BLOBMSG_TYPE_STRING
},
47 [NETWORK_ATTR_AUTH_KEY
] = { "auth_key", BLOBMSG_TYPE_STRING
},
48 [NETWORK_ATTR_KEY
] = { "key", BLOBMSG_TYPE_STRING
},
49 [NETWORK_ATTR_FILE
] = { "file", BLOBMSG_TYPE_STRING
},
50 [NETWORK_ATTR_DATA
] = { "data", BLOBMSG_TYPE_TABLE
},
51 [NETWORK_ATTR_INTERFACE
] = { "interface", BLOBMSG_TYPE_STRING
},
52 [NETWORK_ATTR_KEEPALIVE
] = { "keepalive", BLOBMSG_TYPE_INT32
},
53 [NETWORK_ATTR_DOMAIN
] = { "domain", BLOBMSG_TYPE_STRING
},
54 [NETWORK_ATTR_UPDATE_CMD
] = { "update-cmd", BLOBMSG_TYPE_STRING
},
55 [NETWORK_ATTR_TUNNELS
] = { "tunnels", BLOBMSG_TYPE_TABLE
},
56 [NETWORK_ATTR_AUTH_CONNECT
] = { "auth_connect", BLOBMSG_TYPE_ARRAY
},
59 AVL_TREE(networks
, avl_strcmp
, false, NULL
);
60 static struct blob_buf b
;
62 static void network_load_config_data(struct network
*net
, struct blob_attr
*data
)
64 struct blob_attr
*tb
[__NETCONF_ATTR_MAX
];
65 struct blob_attr
*cur
;
66 siphash_key_t key
= {};
68 blobmsg_parse(netconf_policy
, __NETCONF_ATTR_MAX
, tb
,
69 blobmsg_data(data
), blobmsg_len(data
));
71 if ((cur
= tb
[NETCONF_ATTR_PORT
]) != NULL
)
72 net
->net_config
.port
= blobmsg_get_u32(cur
);
74 net
->net_config
.port
= 51820;
76 if ((cur
= tb
[NETCONF_ATTR_PEX_PORT
]) != NULL
)
77 net
->net_config
.pex_port
= blobmsg_get_u32(cur
);
79 if ((cur
= tb
[NETCONF_ATTR_ID
]) != NULL
) {
80 const char *id
= blobmsg_get_string(cur
);
81 siphash_to_le64(&net
->net_config
.addr
.network_id
, id
, strlen(id
), &key
);
83 siphash_to_le64(&net
->net_config
.addr
.network_id
, &net
->net_config
.port
,
84 sizeof(net
->net_config
.port
), &key
);
87 net
->net_config
.addr
.network_id
[0] = 0xfd;
88 network_fill_host_addr(&net
->net_config
.addr
, net
->config
.pubkey
);
90 if (net
->config
.keepalive
>= 0)
91 net
->net_config
.keepalive
= net
->config
.keepalive
;
92 else if ((cur
= tb
[NETCONF_ATTR_KEEPALIVE
]) != NULL
)
93 net
->net_config
.keepalive
= blobmsg_get_u32(cur
);
95 net
->net_config
.keepalive
= 0;
98 static int network_load_data(struct network
*net
, struct blob_attr
*data
)
100 struct blob_attr
*tb
[__NETDATA_ATTR_MAX
];
102 blobmsg_parse(netdata_policy
, __NETDATA_ATTR_MAX
, tb
,
103 blobmsg_data(data
), blobmsg_len(data
));
105 network_load_config_data(net
, tb
[NETDATA_ATTR_CONFIG
]);
106 network_hosts_add(net
, tb
[NETDATA_ATTR_HOSTS
]);
107 network_services_add(net
, tb
[NETDATA_ATTR_SERVICES
]);
112 static int network_load_file(struct network
*net
)
114 blob_buf_init(&b
, 0);
116 if (!blobmsg_add_json_from_file(&b
, net
->config
.file
))
119 return network_load_data(net
, b
.head
);
122 static int network_load_dynamic(struct network
*net
)
124 const char *json
= NULL
;
130 asprintf(&fname
, "%s/%s.bin", data_dir
, network_name(net
));
131 f
= fopen(fname
, "r");
135 D_NET(net
, "failed to open %s/%s.bin\n", data_dir
, network_name(net
));
139 if (fstat(fileno(f
), &st
) < 0)
142 net
->net_data_len
= st
.st_size
;
143 net
->net_data
= realloc(net
->net_data
, net
->net_data_len
+ 1);
144 memset(net
->net_data
+ net
->net_data_len
, 0, 1);
145 if (fread(net
->net_data
, 1, net
->net_data_len
, f
) != net
->net_data_len
||
146 unet_auth_data_validate(net
->config
.auth_key
, net
->net_data
,
147 net
->net_data_len
, &net
->net_data_version
, &json
)) {
148 net
->net_data_len
= 0;
153 blob_buf_init(&b
, 0);
154 if (!blobmsg_add_json_from_string(&b
, json
)) {
155 net
->net_data_len
= 0;
159 return network_load_data(net
, b
.head
);
166 int network_save_dynamic(struct network
*net
)
168 char *fname
= NULL
, *fname2
;
173 if (net
->config
.type
!= NETWORK_TYPE_DYNAMIC
||
177 asprintf(&fname
, "%s/%s.bin.XXXXXXXX", data_dir
, network_name(net
));
188 len
= fwrite(net
->net_data
, 1, net
->net_data_len
, f
);
193 if (len
!= net
->net_data_len
)
196 fname2
= strdup(fname
);
197 *strrchr(fname2
, '.') = 0;
198 ret
= rename(fname
, fname2
);
214 network_fill_ip(struct blob_buf
*buf
, int af
, union network_addr
*addr
, int mask
)
219 c
= blobmsg_open_table(buf
, NULL
);
221 blobmsg_printf(buf
, "mask", "%d", mask
);
223 str
= blobmsg_alloc_string_buffer(buf
, "ipaddr", INET6_ADDRSTRLEN
);
224 inet_ntop(af
, addr
, str
, INET6_ADDRSTRLEN
);
225 blobmsg_add_string_buffer(buf
);
227 blobmsg_close_table(buf
, c
);
231 network_fill_ipaddr_list(struct network_host
*host
, struct blob_buf
*b
, bool ipv6
)
233 union network_addr addr
= {};
234 struct blob_attr
*cur
;
239 af
= ipv6
? AF_INET6
: AF_INET
;
240 blobmsg_for_each_attr(cur
, host
->peer
.ipaddr
, rem
) {
241 const char *str
= blobmsg_get_string(cur
);
243 if (!!strchr(str
, ':') != ipv6
)
246 if (inet_pton(af
, str
, &addr
) != 1)
249 c
= blobmsg_open_table(b
, NULL
);
250 blobmsg_add_string(b
, "ipaddr", str
);
251 blobmsg_add_string(b
, "mask", ipv6
? "128" : "32");
252 blobmsg_close_table(b
, c
);
257 network_fill_ip_settings(struct network
*net
, struct blob_buf
*buf
)
259 struct network_host
*host
= net
->net_config
.local_host
;
262 c
= blobmsg_open_array(buf
, "ipaddr");
263 network_fill_ipaddr_list(host
, buf
, false);
264 blobmsg_close_array(buf
, c
);
266 c
= blobmsg_open_array(buf
, "ip6addr");
267 network_fill_ip(buf
, AF_INET6
, &host
->peer
.local_addr
, 64);
268 network_fill_ipaddr_list(host
, buf
, true);
269 blobmsg_close_array(buf
, c
);
273 __network_fill_host_subnets(struct network_host
*host
, struct blob_buf
*b
, bool ipv6
)
275 union network_addr addr
= {};
276 struct blob_attr
*cur
;
282 af
= ipv6
? AF_INET6
: AF_INET
;
283 blobmsg_for_each_attr(cur
, host
->peer
.subnet
, rem
) {
284 const char *str
= blobmsg_get_string(cur
);
287 if (!!strchr(str
, ':') != ipv6
)
290 if (network_get_subnet(af
, &addr
, &mask
, str
))
293 c
= blobmsg_open_table(b
, NULL
);
295 buf
= blobmsg_alloc_string_buffer(b
, "target", INET6_ADDRSTRLEN
);
296 inet_ntop(af
, &addr
, buf
, INET6_ADDRSTRLEN
);
297 blobmsg_add_string_buffer(b
);
299 blobmsg_printf(b
, "netmask", "%d", mask
);
301 blobmsg_close_table(b
, c
);
304 blobmsg_for_each_attr(cur
, host
->peer
.ipaddr
, rem
) {
305 const char *str
= blobmsg_get_string(cur
);
307 if (!!strchr(str
, ':') != ipv6
)
310 if (inet_pton(af
, str
, &addr
) != 1)
313 c
= blobmsg_open_table(b
, NULL
);
314 blobmsg_add_string(b
, "target", str
);
315 blobmsg_add_string(b
, "netmask", ipv6
? "128" : "32");
316 blobmsg_close_table(b
, c
);
321 __network_fill_subnets(struct network
*net
, struct blob_buf
*buf
, bool ipv6
)
323 struct network_host
*host
;
326 c
= blobmsg_open_array(buf
, ipv6
? "routes6": "routes");
327 avl_for_each_element(&net
->hosts
, host
, node
) {
328 if (host
== net
->net_config
.local_host
)
330 __network_fill_host_subnets(host
, buf
, ipv6
);
332 blobmsg_close_array(buf
, c
);
337 network_fill_subnets(struct network
*net
, struct blob_buf
*buf
)
339 __network_fill_subnets(net
, buf
, false);
340 __network_fill_subnets(net
, buf
, true);
344 network_do_update(struct network
*net
, bool up
)
346 if (!net
->net_config
.local_host
)
349 blob_buf_init(&b
, 0);
350 blobmsg_add_u32(&b
, "action", 0);
351 blobmsg_add_string(&b
, "ifname", network_name(net
));
352 blobmsg_add_u8(&b
, "link-up", up
);
355 network_fill_ip_settings(net
, &b
);
356 network_fill_subnets(net
, &b
);
360 char *s
= blobmsg_format_json(b
.head
, true);
361 D_NET(net
, "update: %s", s
);
365 if (net
->config
.update_cmd
) {
366 const char *argv
[] = { net
->config
.update_cmd
, NULL
, NULL
};
371 argv
[1] = blobmsg_format_json(b
.head
, true);
372 execvp(argv
[0], (char **)argv
);
375 waitpid(pid
, &stat
, 0);
378 if (!net
->config
.interface
)
381 blobmsg_add_string(&b
, "interface", net
->config
.interface
);
382 unetd_ubus_netifd_update(b
.head
);
385 static void network_reload(struct uloop_timeout
*t
)
387 struct network
*net
= container_of(t
, struct network
, reload_timer
);
389 net
->prev_local_host
= net
->net_config
.local_host
;
391 memset(&net
->net_config
, 0, sizeof(net
->net_config
));
393 network_pex_close(net
);
394 network_services_free(net
);
395 network_hosts_update_start(net
);
396 network_services_update_start(net
);
398 switch (net
->config
.type
) {
399 case NETWORK_TYPE_FILE
:
400 network_load_file(net
);
402 case NETWORK_TYPE_INLINE
:
403 network_load_data(net
, net
->config
.net_data
);
405 case NETWORK_TYPE_DYNAMIC
:
406 network_load_dynamic(net
);
410 network_services_update_done(net
);
411 network_hosts_update_done(net
);
412 uloop_timeout_set(&net
->connect_timer
, 10);
414 net
->prev_local_host
= NULL
;
417 network_do_update(net
, true);
418 network_pex_open(net
);
421 static int network_setup(struct network
*net
)
423 if (wg_init_network(net
)) {
424 fprintf(stderr
, "Setup failed for network %s\n", network_name(net
));
428 net
->ifindex
= if_nametoindex(network_name(net
));
430 fprintf(stderr
, "Could not get ifindex for network %s\n", network_name(net
));
437 static void network_teardown(struct network
*net
)
439 uloop_timeout_cancel(&net
->reload_timer
);
440 network_do_update(net
, false);
441 network_pex_close(net
);
442 network_hosts_free(net
);
443 network_services_free(net
);
444 wg_cleanup_network(net
);
448 network_destroy(struct network
*net
)
450 network_teardown(net
);
451 avl_delete(&networks
, &net
->node
);
453 free(net
->config
.data
);
458 network_set_config(struct network
*net
, struct blob_attr
*config
)
460 struct blob_attr
*tb
[__NETWORK_ATTR_MAX
];
461 struct blob_attr
*cur
;
463 if (net
->config
.data
&& blob_attr_equal(net
->config
.data
, config
))
466 network_teardown(net
);
468 free(net
->config
.data
);
469 memset(&net
->config
, 0, sizeof(net
->config
));
471 net
->config
.data
= blob_memdup(config
);
472 blobmsg_parse(network_policy
, __NETWORK_ATTR_MAX
, tb
,
473 blobmsg_data(net
->config
.data
),
474 blobmsg_len(net
->config
.data
));
476 if ((cur
= tb
[NETWORK_ATTR_TYPE
]) == NULL
||
477 !strcmp(blobmsg_get_string(cur
), "dynamic"))
478 net
->config
.type
= NETWORK_TYPE_DYNAMIC
;
479 else if (!strcmp(blobmsg_get_string(cur
), "file"))
480 net
->config
.type
= NETWORK_TYPE_FILE
;
481 else if (!strcmp(blobmsg_get_string(cur
), "inline"))
482 net
->config
.type
= NETWORK_TYPE_INLINE
;
486 if ((cur
= tb
[NETWORK_ATTR_KEEPALIVE
]) != NULL
)
487 net
->config
.keepalive
= blobmsg_get_u32(cur
);
489 net
->config
.keepalive
= -1;
491 switch (net
->config
.type
) {
492 case NETWORK_TYPE_FILE
:
493 if ((cur
= tb
[NETWORK_ATTR_FILE
]) != NULL
)
494 net
->config
.file
= blobmsg_get_string(cur
);
498 case NETWORK_TYPE_INLINE
:
499 net
->config
.net_data
= tb
[NETWORK_ATTR_DATA
];
500 if (!net
->config
.net_data
)
503 case NETWORK_TYPE_DYNAMIC
:
504 if ((cur
= tb
[NETWORK_ATTR_AUTH_KEY
]) == NULL
)
507 if (b64_decode(blobmsg_get_string(cur
), net
->config
.auth_key
,
508 sizeof(net
->config
.auth_key
)) != sizeof(net
->config
.auth_key
))
513 if ((cur
= tb
[NETWORK_ATTR_INTERFACE
]) != NULL
)
514 net
->config
.interface
= blobmsg_get_string(cur
);
516 if ((cur
= tb
[NETWORK_ATTR_UPDATE_CMD
]) != NULL
)
517 net
->config
.update_cmd
= blobmsg_get_string(cur
);
519 if ((cur
= tb
[NETWORK_ATTR_DOMAIN
]) != NULL
)
520 net
->config
.domain
= blobmsg_get_string(cur
);
522 if ((cur
= tb
[NETWORK_ATTR_TUNNELS
]) != NULL
)
523 net
->config
.tunnels
= cur
;
525 if ((cur
= tb
[NETWORK_ATTR_AUTH_CONNECT
]) != NULL
&&
526 blobmsg_check_array(cur
, BLOBMSG_TYPE_STRING
) > 0)
527 net
->config
.auth_connect
= cur
;
529 if ((cur
= tb
[NETWORK_ATTR_KEY
]) == NULL
)
532 if (b64_decode(blobmsg_get_string(cur
), net
->config
.key
, sizeof(net
->config
.key
)) !=
533 sizeof(net
->config
.key
))
536 curve25519_generate_public(net
->config
.pubkey
, net
->config
.key
);
538 if (network_setup(net
))
542 network_reload(&net
->reload_timer
);
547 network_destroy(net
);
551 static struct network
*
552 network_alloc(const char *name
)
557 net
= calloc_a(sizeof(*net
), &name_buf
, strlen(name
) + 1);
558 net
->node
.key
= strcpy(name_buf
, name
);
559 net
->reload_timer
.cb
= network_reload
;
560 avl_insert(&networks
, &net
->node
);
562 network_pex_init(net
);
563 network_hosts_init(net
);
564 network_services_init(net
);
569 void network_fill_host_addr(union network_addr
*addr
, uint8_t *pubkey
)
571 siphash_key_t key
= {
573 get_unaligned_le64(addr
->network_id
),
574 get_unaligned_le64(addr
->network_id
)
578 siphash_to_le64(&addr
->host_addr
, pubkey
, CURVE25519_KEY_SIZE
, &key
);
581 int unetd_network_add(const char *name
, struct blob_attr
*config
)
585 if (strchr(name
, '/'))
588 net
= avl_find_element(&networks
, name
, net
, node
);
590 net
= network_alloc(name
);
592 return network_set_config(net
, config
);
595 int unetd_network_remove(const char *name
)
599 net
= avl_find_element(&networks
, name
, net
, node
);
603 network_destroy(net
);
608 void network_free_all(void)
610 struct network
*net
, *tmp
;
612 avl_for_each_element_safe(&networks
, net
, node
, tmp
)
613 network_destroy(net
);