main.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License.
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  14  *
  15  *   Copyright (C) 2020 embedd.ch
  16  *   Copyright (C) 2020 Felix Fietkau <nbd@nbd.name>
  17  *   Copyright (C) 2020 John Crispin <john@phrozen.org>
  18  */
  19
  20 #include <unistd.h>
  21 #include <stdarg.h>
  22 #include <syslog.h>
  23
  24 #include <libubox/blobmsg_json.h>
  25
  26 #include "usteer.h"
  27 #include "event.h"
  28 #include "node.h"
  29
  30 struct ubus_context *ubus_ctx;
  31 struct usteer_config config = {};
  32 struct blob_attr *host_info_blob;
  33 uint64_t current_time;
  34 static int dump_time;
  35
  36 LIST_HEAD(node_handlers);
  37
  38 const char * const event_types[__EVENT_TYPE_MAX] = {
  39         [EVENT_TYPE_PROBE] = "probe",
  40         [EVENT_TYPE_AUTH] = "auth",
  41         [EVENT_TYPE_ASSOC] = "assoc",
  42 };
  43
  44 void log_msg(char *msg)
  45 {
  46         if (config.syslog)
  47                 syslog(LOG_INFO, "%s\n", msg);
  48         else
  49                 fprintf(stderr, "%s\n", msg);
  50 }
  51
  52 void debug_msg(int level, const char *func, int line, const char *format, ...)
  53 {
  54         va_list ap;
  55
  56         if (config.debug_level < level)
  57                 return;
  58
  59         if (!config.syslog)
  60                 fprintf(stderr, "[%s:%d] ", func, line);
  61
  62         va_start(ap, format);
  63         if (config.syslog)
  64                 vsyslog(level >= MSG_DEBUG ? LOG_DEBUG : LOG_INFO, format, ap);
  65         else
  66                 vfprintf(stderr, format, ap);
  67         va_end(ap);
  68
  69 }
  70
  71 void debug_msg_cont(int level, const char *format, ...)
  72 {
  73         va_list ap;
  74
  75         if (config.debug_level < level)
  76                 return;
  77
  78         va_start(ap, format);
  79         vfprintf(stderr, format, ap);
  80         va_end(ap);
  81 }
  82
  83 void usteer_init_defaults(void)
  84 {
  85         memset(&config, 0, sizeof(config));
  86
  87         config.sta_block_timeout = 30 * 1000;
  88         config.local_sta_timeout = 120 * 1000;
  89         config.local_sta_update = 1 * 1000;
  90         config.max_retry_band = 5;
  91         config.seen_policy_timeout = 30 * 1000;
  92         config.band_steering_threshold = 5;
  93         config.load_balancing_threshold = 5;
  94         config.remote_update_interval = 1000;
  95         config.initial_connect_delay = 0;
  96         config.remote_node_timeout = 10;
  97
  98         config.roam_kick_delay = 100;
  99         config.roam_scan_tries = 3;
 100         config.roam_scan_interval = 10 * 1000;
 101         config.roam_trigger_interval = 60 * 1000;
 102
 103         config.load_kick_enabled = false;
 104         config.load_kick_threshold = 75;
 105         config.load_kick_delay = 10 * 1000;
 106         config.load_kick_min_clients = 10;
 107         config.load_kick_reason_code = 5; /* WLAN_REASON_DISASSOC_AP_BUSY */
 108
 109         config.debug_level = MSG_FATAL;
 110 }
 111
 112 void usteer_update_time(void)
 113 {
 114         struct timespec ts;
 115
 116         clock_gettime(CLOCK_MONOTONIC, &ts);
 117         current_time = (uint64_t) ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
 118 }
 119
 120 static int usage(const char *prog)
 121 {
 122         fprintf(stderr, "Usage: %s [options]\n"
 123                 "Options:\n"
 124                 " -v:           Increase debug level (repeat for more messages):\n"
 125                 "               1: info messages\n"
 126                 "               2: debug messages\n"
 127                 "               3: verbose debug messages\n"
 128                 "               4: include network messages\n"
 129                 "               5: include extra testing messages\n"
 130                 " -i <name>:    Connect to other instances on interface <name>\n"
 131                 " -s:           Output log messages via syslog instead of stderr\n"
 132                 " -D <n>:       Do not daemonize, wait for <n> seconds and print\n"
 133                 "               remote hosts and nodes\n"
 134                 "\n", prog);
 135         return 1;
 136 }
 137
 138 static void
 139 usteer_dump_timeout(struct uloop_timeout *t)
 140 {
 141         struct usteer_remote_host *host;
 142         struct usteer_remote_node *rn;
 143         struct blob_buf b = {};
 144         char *str;
 145         void *c;
 146
 147         blob_buf_init(&b, 0);
 148
 149         c = blobmsg_open_table(&b, "hosts");
 150         avl_for_each_element(&remote_hosts, host, avl)
 151                 usteer_dump_host(&b, host);
 152         blobmsg_close_table(&b, c);
 153
 154         c = blobmsg_open_table(&b, "nodes");
 155         for_each_remote_node(rn)
 156                 usteer_dump_node(&b, &rn->node);
 157         blobmsg_close_table(&b, c);
 158
 159         str = blobmsg_format_json(b.head, true);
 160         blob_buf_free(&b);
 161
 162         puts(str);
 163         free(str);
 164
 165         uloop_end();
 166 }
 167
 168 int main(int argc, char **argv)
 169 {
 170         struct uloop_timeout dump_timer;
 171         int ch;
 172
 173         usteer_init_defaults();
 174
 175         while ((ch = getopt(argc, argv, "D:i:sv")) != -1) {
 176                 switch(ch) {
 177                 case 'v':
 178                         config.debug_level++;
 179                         break;
 180                 case 's':
 181                         config.syslog = true;
 182                         break;
 183                 case 'i':
 184                         usteer_interface_add(optarg);
 185                         break;
 186                 case 'D':
 187                         dump_time = atoi(optarg);
 188                         break;
 189                 default:
 190                         return usage(argv[0]);
 191                 }
 192         }
 193
 194         openlog("usteer", 0, LOG_USER);
 195
 196         config_set_event_log_types(NULL);
 197         usteer_update_time();
 198         uloop_init();
 199
 200         ubus_ctx = ubus_connect(NULL);
 201         if (!ubus_ctx) {
 202                 fprintf(stderr, "Failed to connect to ubus\n");
 203                 return -1;
 204         }
 205
 206         ubus_add_uloop(ubus_ctx);
 207         usteer_interface_init();
 208         if (dump_time) {
 209                 dump_timer.cb = usteer_dump_timeout;
 210                 uloop_timeout_set(&dump_timer, dump_time * 1000);
 211         } else {
 212                 usteer_ubus_init(ubus_ctx);
 213                 usteer_local_nodes_init(ubus_ctx);
 214         }
 215         uloop_run();
 216
 217         uloop_done();
 218         return 0;
 219 }