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local_node.c
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local_node.c
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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2020 embedd.ch
* Copyright (C) 2020 Felix Fietkau <[email protected]>
* Copyright (C) 2020 John Crispin <[email protected]>
*
* Copyright (C) 2021 Nico Petermann <[email protected]>
* Copyright (C) 2021 Tomas Duchac <[email protected]>
* Copyright (C) 2021 Philip Jonas Franz <[email protected]>
* Copyright (C) 2021 Jan Braun <[email protected]>
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <net/ethernet.h>
#ifdef linux
#include <netinet/ether.h>
#endif
#include <net/if.h>
#include <stdlib.h>
#include <libubox/avl-cmp.h>
#include <libubox/blobmsg_json.h>
#include "usteer.h"
#include "node.h"
#include "hearing_map.h"
AVL_TREE(local_nodes, avl_strcmp, false, NULL);
static struct blob_buf b;
static char *node_up_script;
static void
usteer_local_node_state_reset(struct usteer_local_node *ln)
{
if (ln->req_state == REQ_IDLE)
return;
ubus_abort_request(ubus_ctx, &ln->req);
ln->req_state = REQ_IDLE;
}
static void
usteer_free_node(struct ubus_context *ctx, struct usteer_local_node *ln)
{
struct usteer_node_handler *h;
list_for_each_entry(h, &node_handlers, list) {
if (!h->free_node)
continue;
h->free_node(&ln->node);
}
usteer_local_node_state_reset(ln);
usteer_sta_node_cleanup(&ln->node);
uloop_timeout_cancel(&ln->req_timer);
uloop_timeout_cancel(&ln->update);
avl_delete(&local_nodes, &ln->node.avl);
ubus_unregister_subscriber(ctx, &ln->ev);
free(ln);
}
static void
usteer_handle_remove(struct ubus_context *ctx, struct ubus_subscriber *s,
uint32_t id)
{
struct usteer_local_node *ln = container_of(s, struct usteer_local_node, ev);
usteer_free_node(ctx, ln);
}
static int
usteer_handle_event(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
enum {
EVENT_ADDR,
EVENT_SIGNAL,
EVENT_TARGET,
EVENT_FREQ,
__EVENT_MAX
};
struct blobmsg_policy policy[__EVENT_MAX] = {
[EVENT_ADDR] = { .name = "address", .type = BLOBMSG_TYPE_STRING },
[EVENT_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
[EVENT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
[EVENT_FREQ] = { .name = "freq", .type = BLOBMSG_TYPE_INT32 },
};
enum usteer_event_type ev_type = __EVENT_TYPE_MAX;
struct blob_attr *tb[__EVENT_MAX];
struct usteer_local_node *ln;
struct usteer_node *node;
int signal = NO_SIGNAL;
int freq = 0;
const char *addr_str;
const uint8_t *addr;
int i;
bool ret;
usteer_update_time();
for (i = 0; i < ARRAY_SIZE(event_types); i++) {
if (strcmp(method, event_types[i]) != 0)
continue;
ev_type = i;
break;
}
ln = container_of(obj, struct usteer_local_node, ev.obj);
node = &ln->node;
if (ev_type == EVENT_TYPE_BEACON) {
usteer_handle_event_beacon_report(ln, msg);
return 0;
}
blobmsg_parse(policy, __EVENT_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[EVENT_ADDR] || !tb[EVENT_FREQ])
return UBUS_STATUS_INVALID_ARGUMENT;
if (tb[EVENT_SIGNAL])
signal = (int32_t) blobmsg_get_u32(tb[EVENT_SIGNAL]);
if (tb[EVENT_FREQ])
freq = blobmsg_get_u32(tb[EVENT_FREQ]);
addr_str = blobmsg_data(tb[EVENT_ADDR]);
addr = (uint8_t *) ether_aton(addr_str);
if (!addr)
return UBUS_STATUS_INVALID_ARGUMENT;
ret = usteer_handle_sta_event(node, addr, ev_type, freq, signal);
MSG(DEBUG, "received %s event from %s, signal=%d, freq=%d, handled:%s\n",
method, addr_str, signal, freq, ret ? "true" : "false");
return ret ? 0 : 17 /* WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA */;
}
static void
usteer_local_node_assoc_update(struct sta_info *si, struct blob_attr *data)
{
enum {
MSG_ASSOC,
__MSG_MAX,
};
static struct blobmsg_policy policy[__MSG_MAX] = {
[MSG_ASSOC] = { "assoc", BLOBMSG_TYPE_BOOL },
};
struct blob_attr *tb[__MSG_MAX];
blobmsg_parse(policy, __MSG_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
if (tb[MSG_ASSOC] && blobmsg_get_u8(tb[MSG_ASSOC]))
si->connected = 1;
if (si->node->freq < 4000)
si->sta->seen_2ghz = 1;
else
si->sta->seen_5ghz = 1;
}
static void
usteer_update_client_active_bytes(struct sta_info *si, struct blob_attr *data)
{
enum {
MSG_RX,
MSG_TX,
MSG_BYTES,
__MSG_MAX_BYTES,
__MSG_MAX_RXTX,
};
static struct blobmsg_policy policy_bytes[__MSG_MAX_BYTES] = {
[MSG_BYTES] = { "bytes", BLOBMSG_TYPE_TABLE },
};
static struct blobmsg_policy policy_rxtx[__MSG_MAX_RXTX] = {
[MSG_RX] = { "rx", BLOBMSG_TYPE_INT64 },
[MSG_TX] = { "tx", BLOBMSG_TYPE_INT64 },
};
struct sta_active_bytes active_bytes = si->active_bytes;
struct blob_attr *tb_bytes[__MSG_MAX_BYTES];
struct blob_attr *tb_rxtx[__MSG_MAX_RXTX];
uint64_t ctime = current_time;
if (ctime - active_bytes.last_time < config.kick_client_active_sec * 1000)
return;
blobmsg_parse(policy_bytes, __MSG_MAX_BYTES, tb_bytes, blobmsg_data(data), blobmsg_data_len(data));
if (!tb_bytes[MSG_BYTES])
return;
blobmsg_parse(policy_rxtx, __MSG_MAX_RXTX, tb_rxtx, blobmsg_data(tb_bytes[MSG_BYTES]), blobmsg_data_len(tb_bytes[MSG_BYTES]));
if (!tb_rxtx[MSG_RX] || !tb_rxtx[MSG_TX])
return;
memcpy(active_bytes.data[0], active_bytes.data[1], sizeof(active_bytes.data[1]));
active_bytes.data[1][0] = blobmsg_get_u64(tb_rxtx[MSG_RX]);
active_bytes.data[1][1] = blobmsg_get_u64(tb_rxtx[MSG_TX]);
active_bytes.last_time = ctime;
si->active_bytes = active_bytes;
}
static void
usteer_local_node_set_assoc(struct usteer_local_node *ln, struct blob_attr *cl)
{
struct usteer_node *node = &ln->node;
struct usteer_node_handler *h;
struct blob_attr *cur;
struct sta_info *si;
struct sta *sta;
int n_assoc = 0;
int rem;
list_for_each_entry(si, &node->sta_info, node_list) {
if (si->connected)
si->connected = 2;
}
blobmsg_for_each_attr(cur, cl, rem) {
uint8_t *addr = (uint8_t *) ether_aton(blobmsg_name(cur));
bool create;
if (!addr)
continue;
sta = usteer_sta_get(addr, true);
si = usteer_sta_info_get(sta, node, &create);
list_for_each_entry(h, &node_handlers, list) {
if (!h->update_sta)
continue;
h->update_sta(node, si);
}
usteer_local_node_assoc_update(si, cur);
if (si->connected == 1)
n_assoc++;
usteer_update_client_active_bytes(si, cur);
usteer_beacon_request_check(si);
}
node->n_assoc = n_assoc;
list_for_each_entry(si, &node->sta_info, node_list) {
if (si->connected != 2)
continue;
si->connected = 0;
usteer_sta_info_update_timeout(si, config.local_sta_timeout);
MSG(VERBOSE, "station "MAC_ADDR_FMT" disconnected from node %s\n",
MAC_ADDR_DATA(si->sta->addr), usteer_node_name(node));
}
}
static void
usteer_local_node_list_cb(struct ubus_request *req, int type, struct blob_attr *msg)
{
enum {
MSG_FREQ,
MSG_CLIENTS,
__MSG_MAX,
};
static struct blobmsg_policy policy[__MSG_MAX] = {
[MSG_FREQ] = { "freq", BLOBMSG_TYPE_INT32 },
[MSG_CLIENTS] = { "clients", BLOBMSG_TYPE_TABLE },
};
struct blob_attr *tb[__MSG_MAX];
struct usteer_local_node *ln;
struct usteer_node *node;
ln = container_of(req, struct usteer_local_node, req);
node = &ln->node;
blobmsg_parse(policy, __MSG_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[MSG_FREQ] || !tb[MSG_CLIENTS])
return;
node->freq = blobmsg_get_u32(tb[MSG_FREQ]);
usteer_local_node_set_assoc(ln, tb[MSG_CLIENTS]);
}
static void
usteer_local_node_rrm_nr_cb(struct ubus_request *req, int type, struct blob_attr *msg)
{
static const struct blobmsg_policy policy = {
"value", BLOBMSG_TYPE_ARRAY
};
struct usteer_local_node *ln;
struct blob_attr *tb;
ln = container_of(req, struct usteer_local_node, req);
blobmsg_parse(&policy, 1, &tb, blob_data(msg), blob_len(msg));
if (!tb)
return;
usteer_node_set_blob(&ln->node.rrm_nr, tb);
struct blobmsg_policy policy_bssid[3] = {
{ .type = BLOBMSG_TYPE_STRING },
{ .type = BLOBMSG_TYPE_STRING },
{ .type = BLOBMSG_TYPE_STRING },
};
struct blob_attr *ba[3];
blobmsg_parse_array(policy_bssid, ARRAY_SIZE(ba), ba, blobmsg_data(ln->node.rrm_nr), blobmsg_data_len(ln->node.rrm_nr));
if (ba[0]) {
uint8_t *bssid = (uint8_t *) ether_aton(blobmsg_get_string(ba[0]));
memcpy(ln->node.bssid, bssid, sizeof(ln->node.bssid));
}
if(ba[1]) {
char *ssid = blobmsg_get_string(ba[1]);
if (!usteer_is_valid_ssid(ssid))
usteer_free_node(ubus_ctx, ln);
}
}
static void
usteer_local_node_req_cb(struct ubus_request *req, int ret)
{
struct usteer_local_node *ln;
ln = container_of(req, struct usteer_local_node, req);
uloop_timeout_set(&ln->req_timer, 1);
}
static void
usteer_add_rrm_data(struct usteer_local_node *ln, struct usteer_node *node)
{
if (node == &ln->node)
return;
if (!node->rrm_nr)
return;
if (strcmp(ln->node.ssid, node->ssid) != 0)
return;
blobmsg_add_field(&b, BLOBMSG_TYPE_ARRAY, "",
blobmsg_data(node->rrm_nr),
blobmsg_data_len(node->rrm_nr));
}
static void
usteer_local_node_prepare_rrm_set(struct usteer_local_node *ln)
{
struct usteer_remote_node *rn;
struct usteer_node *node;
void *c;
c = blobmsg_open_array(&b, "list");
avl_for_each_element(&local_nodes, node, avl)
usteer_add_rrm_data(ln, node);
avl_for_each_element(&remote_nodes, rn, avl)
usteer_add_rrm_data(ln, &rn->node);
blobmsg_close_array(&b, c);
}
static void
usteer_local_node_state_next(struct uloop_timeout *timeout)
{
struct usteer_local_node *ln;
ln = container_of(timeout, struct usteer_local_node, req_timer);
ln->req_state++;
if (ln->req_state >= __REQ_MAX) {
ln->req_state = REQ_IDLE;
return;
}
blob_buf_init(&b, 0);
switch (ln->req_state) {
case REQ_CLIENTS:
ubus_invoke_async(ubus_ctx, ln->obj_id, "get_clients", b.head, &ln->req);
ln->req.data_cb = usteer_local_node_list_cb;
break;
case REQ_RRM_SET_LIST:
usteer_local_node_prepare_rrm_set(ln);
ubus_invoke_async(ubus_ctx, ln->obj_id, "rrm_nr_set", b.head, &ln->req);
ln->req.data_cb = NULL;
break;
case REQ_RRM_GET_OWN:
ubus_invoke_async(ubus_ctx, ln->obj_id, "rrm_nr_get_own", b.head, &ln->req);
ln->req.data_cb = usteer_local_node_rrm_nr_cb;
break;
default:
break;
}
ln->req.complete_cb = usteer_local_node_req_cb;
ubus_complete_request_async(ubus_ctx, &ln->req);
}
static void
usteer_local_node_update(struct uloop_timeout *timeout)
{
struct usteer_local_node *ln;
struct usteer_node_handler *h;
struct usteer_node *node;
ln = container_of(timeout, struct usteer_local_node, update);
node = &ln->node;
MSG_T("local_sta_update", "timeout (%u) expired\n",
config.local_sta_update);
list_for_each_entry(h, &node_handlers, list) {
if (!h->update_node)
continue;
h->update_node(node);
}
usteer_local_node_state_reset(ln);
uloop_timeout_set(&ln->req_timer, 1);
usteer_local_node_kick(ln);
uloop_timeout_set(timeout, config.local_sta_update);
}
static struct usteer_local_node *
usteer_get_node(struct ubus_context *ctx, const char *name)
{
struct usteer_local_node *ln;
struct usteer_node *node;
char *str;
ln = avl_find_element(&local_nodes, name, ln, node.avl);
if (ln)
return ln;
ln = calloc_a(sizeof(*ln), &str, strlen(name) + 1);
node = &ln->node;
node->type = NODE_TYPE_LOCAL;
node->avl.key = strcpy(str, name);
ln->ev.remove_cb = usteer_handle_remove;
ln->ev.cb = usteer_handle_event;
ln->update.cb = usteer_local_node_update;
ln->req_timer.cb = usteer_local_node_state_next;
ubus_register_subscriber(ctx, &ln->ev);
avl_insert(&local_nodes, &node->avl);
uloop_timeout_set(&ln->update, 1);
INIT_LIST_HEAD(&node->sta_info);
return ln;
}
static void
usteer_node_run_update_script(struct usteer_node *node)
{
struct usteer_local_node *ln = container_of(node, struct usteer_local_node, node);
char *val;
if (!node_up_script)
return;
val = alloca(strlen(node_up_script) + strlen(ln->iface) + 8);
sprintf(val, "%s '%s'", node_up_script, ln->iface);
if (system(val))
fprintf(stderr, "failed to execute %s\n", val);
}
static void
usteer_register_node(struct ubus_context *ctx, const char *name, uint32_t id)
{
struct usteer_local_node *ln;
struct usteer_node_handler *h;
const char *iface;
int offset = sizeof("hostapd.") - 1;
iface = name + offset;
if (strncmp(name, "hostapd.", iface - name) != 0)
return;
MSG(INFO, "Connecting to local node %s\n", name);
ln = usteer_get_node(ctx, name);
ln->obj_id = id;
ln->iface = usteer_node_name(&ln->node) + offset;
ln->ifindex = if_nametoindex(iface);
blob_buf_init(&b, 0);
blobmsg_add_u32(&b, "notify_response", 1);
ubus_invoke(ctx, id, "notify_response", b.head, NULL, NULL, 1000);
blob_buf_init(&b, 0);
blobmsg_add_u8(&b, "neighbor_report", 1);
blobmsg_add_u8(&b, "beacon_report", 1);
blobmsg_add_u8(&b, "bss_transition", 1);
ubus_invoke(ctx, id, "bss_mgmt_enable", b.head, NULL, NULL, 1000);
ubus_subscribe(ctx, &ln->ev, id);
list_for_each_entry(h, &node_handlers, list) {
if (!h->init_node)
continue;
h->init_node(&ln->node);
}
usteer_node_run_update_script(&ln->node);
}
static void
usteer_event_handler(struct ubus_context *ctx, struct ubus_event_handler *ev,
const char *type, struct blob_attr *msg)
{
static const struct blobmsg_policy policy[2] = {
{ .name = "id", .type = BLOBMSG_TYPE_INT32 },
{ .name = "path", .type = BLOBMSG_TYPE_STRING },
};
struct blob_attr *tb[2];
const char *path;
blobmsg_parse(policy, 2, tb, blob_data(msg), blob_len(msg));
if (!tb[0] || !tb[1])
return;
path = blobmsg_data(tb[1]);
usteer_register_node(ctx, path, blobmsg_get_u32(tb[0]));
}
static void
usteer_register_events(struct ubus_context *ctx)
{
static struct ubus_event_handler handler = {
.cb = usteer_event_handler
};
ubus_register_event_handler(ctx, &handler, "ubus.object.add");
}
static void
node_list_cb(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
{
usteer_register_node(ctx, obj->path, obj->id);
}
void config_set_node_up_script(struct blob_attr *data)
{
const char *val = blobmsg_get_string(data);
struct usteer_node *node;
if (node_up_script && !strcmp(val, node_up_script))
return;
free(node_up_script);
if (!strlen(val)) {
node_up_script = NULL;
return;
}
node_up_script = strdup(val);
avl_for_each_element(&local_nodes, node, avl)
usteer_node_run_update_script(node);
}
void config_get_node_up_script(struct blob_buf *buf)
{
if (!node_up_script)
return;
blobmsg_add_string(buf, "node_up_script", node_up_script);
}
void
usteer_local_nodes_init(struct ubus_context *ctx)
{
usteer_register_events(ctx);
ubus_lookup(ctx, "hostapd.*", node_list_cb, NULL);
}