#include #include #include #include #include "memory_utils.h" #include "datastorage.h" #include "dawn_iwinfo.h" #include "dawn_uci.h" static struct uci_context *uci_ctx = NULL; static struct uci_package *uci_pkg = NULL; static void set_if_present_int(int *ret, struct uci_section *s, const char* option) { const char *str; if (s && (str = uci_lookup_option_string(uci_ctx, s, option))) *ret = atoi(str); } #define DAWN_SET_CONFIG_INT(m, s, conf) \ set_if_present_int(&m.conf, s, #conf) void uci_get_hostname(char* hostname) { dawnlog_debug_func("Entering..."); char path[]= "system.@system[0].hostname"; struct uci_ptr ptr; struct uci_context *c = uci_alloc_context(); dawn_regmem(c); if(!c){ return; } if ((uci_lookup_ptr(c, &ptr, path, true) != UCI_OK) || (ptr.o==NULL || ptr.o->v.string==NULL)){ uci_free_context(c); dawn_unregmem(c); return; } if(ptr.flags & UCI_LOOKUP_COMPLETE) { char *dot = strchr(ptr.o->v.string, '.'); size_t len = HOST_NAME_MAX - 1; if (dot && dot < ptr.o->v.string + len) { len = dot - ptr.o->v.string; } snprintf(hostname, HOST_NAME_MAX, "%.*s", (int)len, ptr.o->v.string); } uci_free_context(c); dawn_unregmem(c); } static void set_if_present_time_t(time_t *ret, struct uci_section *s, const char* option) { const char *str; if (s && (str = uci_lookup_option_string(uci_ctx, s, option))) *ret = atoi(str); } #define DAWN_SET_CONFIG_TIME(m, s, conf) \ set_if_present_time_t(&m.conf, s, #conf) struct time_config_s uci_get_time_config() { struct time_config_s ret = { .update_client = 10, .remove_client = 15, .remove_probe = 30, .update_hostapd = 10, .remove_ap = 460, .update_tcp_con = 10, .update_chan_util = 5, .update_beacon_reports = 20, .con_timeout = 60, }; dawnlog_debug_func("Entering..."); struct uci_element *e; uci_foreach_element(&uci_pkg->sections, e) { struct uci_section *s = uci_to_section(e); if (strcmp(s->type, "times") == 0) { //CONFIG-T: update_client|Timer to send refresh local connection information and revised NEIGHBOR REPORT to all clients|[10] DAWN_SET_CONFIG_TIME(ret, s, update_client); //CONFIG-T: remove_client|Timer to remove expired client entries from core data set|[15] DAWN_SET_CONFIG_TIME(ret, s, remove_client); //CONFIG-T: remove_probe|Timer to remove expired PROBE and BEACON entries from core data set|[30] DAWN_SET_CONFIG_TIME(ret, s, remove_probe); //CONFIG-T: update_hostapd|Timer to (re-)register for hostapd messages for each local BSSID|[10] DAWN_SET_CONFIG_TIME(ret, s, update_hostapd); //CONFIG-T: remove_ap|Timer to remove expired AP entries from core data set|[460] DAWN_SET_CONFIG_TIME(ret, s, remove_ap); //CONFIG-T: update_tcp_con|Timer to refresh / remove the TCP connections to other DAWN instances found via uMDNS|[10] DAWN_SET_CONFIG_TIME(ret, s, update_tcp_con); //CONFIG-T: update_chan_util|Timer to get recent channel utilisation figure for each local BSSID|[5] DAWN_SET_CONFIG_TIME(ret, s, update_chan_util); //CONFIG-T: update_beacon_reports|Timer to ask all connected clients for a new BEACON REPORT|[20] DAWN_SET_CONFIG_TIME(ret, s, update_beacon_reports); //CONFIG-T: con_timeout|Timespan to check if a connection timed out|[60] DAWN_SET_CONFIG_TIME(ret, s, con_timeout); return ret; } } return ret; } struct local_config_s uci_get_local_config() { struct local_config_s ret = { .loglevel = 0, }; dawnlog_debug_func("Entering..."); struct uci_element* e; uci_foreach_element(&uci_pkg->sections, e) { struct uci_section* s = uci_to_section(e); if (strcmp(s->type, "local") == 0) { // CONFIG-L: loglevel|Verbosity of messages in syslog|[0 = Important only - very few messages]; 1 = Show what DAWN is processing in a user friendly way; 2 = Trace certain operations - for debugging; 3 = Broad low level tracing - for debugging DAWN_SET_CONFIG_INT(ret, s, loglevel); } } switch (ret.loglevel) { case 3: dawnlog_minlevel(DAWNLOG_DEBUG); break; case 2: dawnlog_minlevel(DAWNLOG_TRACE); break; case 1: dawnlog_minlevel(DAWNLOG_INFO); break; case 0: default: dawnlog_minlevel(DAWNLOG_ALWAYS); break; } return ret; } static struct mac_entry_s *insert_neighbor_mac(struct mac_entry_s *head, const char* mac) { dawnlog_debug_func("Entering..."); struct mac_entry_s *new = dawn_malloc(sizeof(struct mac_entry_s)); if (new == NULL) { dawnlog_error("Failed to allocate neighbor entry for '%s'\n", mac); return head; } memset(new, 0, sizeof (struct mac_entry_s)); if (hwaddr_aton(mac, new->mac.u8) != 0) { dawnlog_error("Failed to parse MAC from '%s'\n", mac); dawn_free(new); new = NULL; return head; } new->next_mac = head; return new; } static void free_neighbor_mac_list(struct mac_entry_s *list) { struct mac_entry_s *ptr = list; dawnlog_debug_func("Entering..."); while (list) { ptr = list; list = list->next_mac; dawn_free(ptr); ptr = NULL; } } static struct mac_entry_s* uci_lookup_mac_list(struct uci_option *o) { struct uci_element *e = NULL; struct mac_entry_s *head = NULL; char* str = NULL; dawnlog_debug_func("Entering..."); if (o == NULL) return NULL; // hostapd inserts the new neigbor reports at the top of the list. // Therefore, we must also do this backwares somewhere. Let's do it // here instead of when sending the list through ubus. switch (o->type) { case UCI_TYPE_LIST: uci_foreach_element(&o->v.list, e) head = insert_neighbor_mac(head, e->name); break; case UCI_TYPE_STRING: if (!(str = strdup (o->v.string))) return NULL; for (char *mac = strtok(str, " "); mac; mac = strtok(NULL, " ")) head = insert_neighbor_mac(head, mac); free(str); } return head; } static struct uci_section *uci_find_metric_section(const char *name) { struct uci_section *s; struct uci_element *e; dawnlog_debug_func("Entering..."); uci_foreach_element(&uci_pkg->sections, e) { s = uci_to_section(e); if (strcmp(s->type, "metric") == 0 && ((!name && s->anonymous) || strcmp(e->name, name) == 0)) { return s; } } return NULL; } #define DAWN_SET_BANDS_CONFIG_INT(m, global_s, band_s, conf) \ do for (int band = 0; band < __DAWN_BAND_MAX; band++) { \ if (global_s) \ set_if_present_int(&m.conf[band], global_s, #conf); \ if (band_s[band]) \ set_if_present_int(&m.conf[band], band_s[band], #conf); \ } while (0) struct probe_metric_s uci_get_dawn_metric() { struct probe_metric_s ret = { // CONFIG-G: kicking|Method to select clients to move to better AP|0 = Disabled; 1 = RSSI Comparison; 2 = Absolute RSSI; [3 = Both] See note 1. .kicking = 3, //CONFIG-G: kicking_threshold|Minimum score difference to consider kicking to alternate AP|[20] .kicking_threshold = 20, // CONFIG-G: min_probe_count|Number of times a client should retry PROBE before acceptance| [3] See Note 1. .min_probe_count = 3, // CONFIG-G: use_station_count|Compare connected station counts when considering kicking|[0 = Disabled]; 1 = Enabled .use_station_count = 0, // CONFIG-G: eval_auth_req|Control whether AUTHENTICATION frames are evaluated for rejection|[0 = No evaluation]; 1 = Evaluated. See Note 1. .eval_auth_req = 0, // CONFIG-G: eval_assoc_req|Control whether ASSOCIATION frames are evaluated for rejection|[0 = No evaluation]; 1 = Evaluated. See Note 1. .eval_assoc_req = 0, // CONFIG-G: deny_auth_reason|802.11 code used when AUTHENTICATION is denied|[1] (802.11 UNSPECIFIED_FAILURE). See Note 1. .deny_auth_reason = 1, // CONFIG-G: deny_assoc_reason|802.11 code used when ASSOCIATION is denied|[17] (802.11 AP_UNABLE_TO_HANDLE_NEW_STA). See Note 1. .deny_assoc_reason = 17, // CONFIG-G: eval_probe_req|Control whether PROBE frames are evaluated for rejection|[0 = No evaluation]; 1 = Evaluated. See Note 1. .eval_probe_req = 0, // CONFIG-G: min_number_to_kick|Number of consecutive times a client should be evaluated as ready to kick before actually doing it|[3] .min_number_to_kick = 3, // CONFIG-G: set_hostapd_nr|Method used to set Neighbor Report on AP|[0 = Disabled]; 1 = "Static" based on all APs in network (plus set from configuration); 2 = "Dynamic" based on next nearest AP seen by current clients .set_hostapd_nr = 0, // CONFIG-G: disassoc_nr_length|Number of entries to include in a 802.11v DISASSOCIATE Neighbor Report|[6] (Documented for use by iOS) .disassoc_nr_length = 6, // CONFIG-G: max_station_diff|Number of connected stations to consider "better" for use_station_count|[1] .max_station_diff = 1, // CONFIG-G: bandwidth_threshold|Maximum reported AP-client bandwidth permitted when kicking. Set to zero to disable the check.|[6] (Mbits/s) .bandwidth_threshold = 6, // CONFIG-G: chan_util_avg_period|Number of sampling periods to average channel utilization values over|[3] .chan_util_avg_period = 3, // CONFIG-G: duration|802.11k BEACON request DURATION parameter|[0] .duration = 150, // CONFIG-G: rrm_mode|Preferred order for using Passive, Active or Table 802.11k BEACON information|[PAT] String of 'P', 'A' and / or 'T' .rrm_mode_mask = WLAN_RRM_CAPS_BEACON_REPORT_PASSIVE | WLAN_RRM_CAPS_BEACON_REPORT_ACTIVE | WLAN_RRM_CAPS_BEACON_REPORT_TABLE, .rrm_mode_order = { WLAN_RRM_CAPS_BEACON_REPORT_PASSIVE, WLAN_RRM_CAPS_BEACON_REPORT_ACTIVE, WLAN_RRM_CAPS_BEACON_REPORT_TABLE }, // CONFIG-B: ap_weight|Per AP weighting|[0] (Deprecated) .ap_weight = { 0, 0 }, // CONFIG-B: ht_support|Score increment if HT is supported|[5] .ht_support = { 5, 5 }, // CONFIG-B: vht_support|Score increment if VHT is supported|[5] .vht_support = { 5, 5 }, // CONFIG-B: no_ht_support|Score incrment if HT is not supported|[0] (Deprecated) .no_ht_support = { 0, 0 }, // CONFIG-B: no_vht_support|Score incrment if VHT is not supported|[0] (Deprecated) .no_vht_support = { 0, 0 }, // CONFIG-B: rssi|Score addition when signal exceeds threshold|[15] See note 2. .rssi = { 15, 15 }, // CONFIG-B: rssi_val|Threshold for an good RSSI|[-60] See note 2. .rssi_val = { -60, -60 }, // CONFIG-B: initial_score|Base score for AP based on operating band|[2.4GHz = 80; 5Ghz = 100] .initial_score = { 80, 100 }, // CONFIG-B: chan_util|Score increment if channel utilization is below chan_util_val|[0] .chan_util = { 0, 0 }, // CONFIG-B: max_chan_util_val|Lower threshold for bad channel utilization|[170] .max_chan_util_val = { 170, 170 }, // CONFIG-B: chan_util_val|Upper threshold for good channel utilization|[140] .chan_util_val = { 140, 140 }, // CONFIG-B: max_chan_util|Score increment if channel utilization is above max_chan_util_val|[-15] .max_chan_util = { -15, -15 }, // CONFIG-B: low_rssi|Score addition when signal is below threshold|[-15] See note 2. .low_rssi = { -15, -15 }, // CONFIG-B: low_rssi_val|Threshold for bad RSSI|[-80] See note 2. .low_rssi_val = { -80, -80 }, // CONFIG-B: rssi_center|Midpoint for weighted RSSI evaluation|[-70] See note 2. .rssi_center = { -70, -70 }, // CONFIG-B: rssi_weight|Per dB increment for weighted RSSI evaluation|[0] See note 2. .rssi_weight = { 0, 0 }, .neighbors = {NULL, NULL}, }; struct uci_section *global_s, *band_s[__DAWN_BAND_MAX]; struct uci_option *global_neighbors = NULL, *neighbors; dawnlog_debug_func("Entering..."); global_s = uci_find_metric_section("global"); if (!global_s && (global_s = uci_find_metric_section(NULL))) dawnlog_warning("config metric global section not found. " "Using first unnamed config metric.\n" "Consider naming a 'global' metric section to avoid ambiguity.\n"); if (!global_s) dawnlog_warning("config metric global section not found! Using defaults.\n"); if (global_s) { // True global configuration DAWN_SET_CONFIG_INT(ret, global_s, kicking); DAWN_SET_CONFIG_INT(ret, global_s, kicking_threshold); DAWN_SET_CONFIG_INT(ret, global_s, min_probe_count); DAWN_SET_CONFIG_INT(ret, global_s, use_station_count); DAWN_SET_CONFIG_INT(ret, global_s, eval_auth_req); DAWN_SET_CONFIG_INT(ret, global_s, eval_assoc_req); DAWN_SET_CONFIG_INT(ret, global_s, deny_auth_reason); DAWN_SET_CONFIG_INT(ret, global_s, deny_assoc_reason); DAWN_SET_CONFIG_INT(ret, global_s, eval_probe_req); DAWN_SET_CONFIG_INT(ret, global_s, min_number_to_kick); DAWN_SET_CONFIG_INT(ret, global_s, set_hostapd_nr); DAWN_SET_CONFIG_INT(ret, global_s, disassoc_nr_length); DAWN_SET_CONFIG_INT(ret, global_s, max_station_diff); DAWN_SET_CONFIG_INT(ret, global_s, bandwidth_threshold); DAWN_SET_CONFIG_INT(ret, global_s, chan_util_avg_period); DAWN_SET_CONFIG_INT(ret, global_s, duration); ret.rrm_mode_mask = parse_rrm_mode(ret.rrm_mode_order, uci_lookup_option_string(uci_ctx, global_s, "rrm_mode")); global_neighbors = uci_lookup_option(uci_ctx, global_s, "neighbors"); } for (int band = 0; band < __DAWN_BAND_MAX; band++) { band_s[band] = uci_find_metric_section(band_config_name[band]); neighbors = band_s[band] ? uci_lookup_option(uci_ctx, band_s[band], "neighbors") : NULL; ret.neighbors[band] = uci_lookup_mac_list(neighbors ? : global_neighbors); } DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, initial_score); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, ap_weight); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, ht_support); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, vht_support); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, no_ht_support); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, no_vht_support); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, rssi); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, rssi_val); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, chan_util); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, max_chan_util); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, chan_util_val); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, max_chan_util_val); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, low_rssi); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, low_rssi_val); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, rssi_weight); DAWN_SET_BANDS_CONFIG_INT(ret, global_s, band_s, rssi_center); return ret; } struct network_config_s uci_get_dawn_network() { struct network_config_s ret = { .broadcast_ip = "", .broadcast_port = 1025, .server_ip = "", .tcp_port = 1026, .network_option = 2, .shared_key = "Niiiiiiiiiiiiiik", .iv = "Niiiiiiiiiiiiiik", .use_symm_enc = 0, .collision_domain = -1, .bandwidth = -1, }; dawnlog_debug_func("Entering..."); struct uci_element *e; uci_foreach_element(&uci_pkg->sections, e) { struct uci_section *s = uci_to_section(e); if (strcmp(s->type, "network") == 0) { // CONFIG-N: broadcast_ip|IP address for broadcast and multicast|No default const char* str_broadcast = uci_lookup_option_string(uci_ctx, s, "broadcast_ip"); if (str_broadcast) strncpy(ret.broadcast_ip, str_broadcast, MAX_IP_LENGTH); // CONFIG-N: server_ip|IP address when not using UMDNS|No default const char* str_server_ip = uci_lookup_option_string(uci_ctx, s, "server_ip"); if(str_server_ip) strncpy(ret.server_ip, str_server_ip, MAX_IP_LENGTH); // CONFIG-N: broadcast_port|IP port for broadcast and multicast|[1026] DAWN_SET_CONFIG_INT(ret, s, broadcast_port); // CONFIG-N: shared_key|Unused|N/A const char* str_shared_key = uci_lookup_option_string(uci_ctx, s, "shared_key"); if (str_shared_key) strncpy(ret.shared_key, str_shared_key, MAX_KEY_LENGTH); // CONFIG-N: iv|Unused|N/A const char* str_iv = uci_lookup_option_string(uci_ctx, s, "iv"); if (str_iv) strncpy(ret.iv, str_iv, MAX_KEY_LENGTH); // CONFIG-N: network_option|Method of networking between DAWN instances|0 = Broadcast; 2 = Multicast; [2 = TCP with UMDNS discovery]; 3 = TCP w/out UMDNS discovery DAWN_SET_CONFIG_INT(ret, s, network_option); // CONFIG-N: tcp_port|Port for TCP networking|[1025] DAWN_SET_CONFIG_INT(ret, s, tcp_port); // CONFIG-N: use_symm_enc|Enable encryption of network traffic|[0 = Disabled]; 1 = Enabled DAWN_SET_CONFIG_INT(ret, s, use_symm_enc); // CONFIG-N: collision_domain|Unused|N/A DAWN_SET_CONFIG_INT(ret, s, collision_domain); // CONFIG-N: bandwidth|Unused|N/A DAWN_SET_CONFIG_INT(ret, s, bandwidth); return ret; } } return ret; } bool uci_get_dawn_hostapd_dir() { dawnlog_debug_func("Entering..."); struct uci_element *e; uci_foreach_element(&uci_pkg->sections, e) { struct uci_section *s = uci_to_section(e); if (strcmp(s->type, "hostapd") == 0) { // CONFIG-H: hostapd_dir|Path to hostapd runtime information|[/var/run/hostapd] const char* str = uci_lookup_option_string(uci_ctx, s, "hostapd_dir"); if (str) strncpy(hostapd_dir_glob, str, HOSTAPD_DIR_LEN); return true; } } // If we get to here we haven't set a value yet strncpy(hostapd_dir_glob, "/var/run/hostapd", HOSTAPD_DIR_LEN); return false; } int uci_reset() { dawnlog_debug_func("Entering..."); struct uci_context *ctx = uci_ctx; if (!ctx) { ctx = uci_alloc_context(); dawn_regmem(ctx); uci_ctx = ctx; } uci_pkg = uci_lookup_package(ctx, "dawn"); uci_unload(uci_ctx, uci_pkg); dawn_unregmem(uci_pkg); uci_load(uci_ctx, "dawn", &uci_pkg); dawn_regmem(uci_pkg); return 0; } int uci_init() { dawnlog_debug_func("Entering..."); struct uci_context *ctx = uci_ctx; if (!ctx) { ctx = uci_alloc_context(); dawn_regmem(ctx); uci_ctx = ctx; ctx->flags &= ~UCI_FLAG_STRICT; } else { ctx->flags &= ~UCI_FLAG_STRICT; // shouldn't happen? uci_pkg = uci_lookup_package(ctx, "dawn"); if (uci_pkg) { uci_unload(ctx, uci_pkg); dawn_unregmem(uci_pkg); uci_pkg = NULL; } } if (uci_load(ctx, "dawn", &uci_pkg)) return -1; else dawn_regmem(uci_pkg); return 1; } int uci_clear() { dawnlog_debug_func("Entering..."); // CONFIG-G: neighbors|Space seperated list of MACS to use in "static" AP Neighbor Report| None for (int band = 0; band < __DAWN_BAND_MAX; band++) free_neighbor_mac_list(dawn_metric.neighbors[band]); if (uci_pkg != NULL) { uci_unload(uci_ctx, uci_pkg); dawn_unregmem(uci_pkg); uci_pkg = NULL; } if (uci_ctx != NULL) { uci_free_context(uci_ctx); dawn_unregmem(uci_ctx); } return 1; } int uci_set_network(char* uci_cmd) { dawnlog_debug_func("UCI command = \"%s\"...", uci_cmd); struct uci_context *ctx = uci_ctx; if (!ctx) { ctx = uci_alloc_context(); dawn_regmem(ctx); uci_ctx = ctx; } ctx->flags |= UCI_FLAG_STRICT; int ret = UCI_OK; struct uci_ptr ptr; if (ret == UCI_OK) { ret = uci_lookup_ptr(ctx, &ptr, uci_cmd, 1); } if (ret == UCI_OK) { // Magic code to add unnamed section like 'config times' exactly once - no idea if this is quite right if (ptr.target == UCI_TYPE_SECTION && ptr.value == NULL) { char new_cmd[1024]; // Magic number sprintf(new_cmd, "%s.@%s[0]", ptr.package, ptr.section); struct uci_ptr ptr2; ret = uci_lookup_ptr(ctx, &ptr2, new_cmd, 1); if (ret == UCI_OK && ptr2.s == NULL) { ret = uci_add_section(ctx, ptr.p, ptr.section, &ptr.s); } } else { ret = uci_set(ctx, &ptr); } } if (ret == UCI_OK) { ret = uci_lookup_ptr(ctx, &ptr, "dawn", 1); } if (ret == UCI_OK) { ret = uci_commit(ctx, &ptr.p, 0); } if (ret != UCI_OK) { dawnlog_error("Failed to commit UCI cmd: %s\n", uci_cmd); } return ret; }