config.c

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	if (keyidx < 0 || keyidx > 3 || wep->key[keyidx] != NULL)
		return -1;

	if (val[0] == '"') {
		if (len < 2 || val[len - 1] != '"')
			return -1;
		len -= 2;
		wep->key[keyidx] = os_malloc(len);
		if (wep->key[keyidx] == NULL)
			return -1;
		os_memcpy(wep->key[keyidx], val + 1, len);
		wep->len[keyidx] = len;
	} else {
		if (len & 1)
			return -1;
		len /= 2;
		wep->key[keyidx] = os_malloc(len);
		if (wep->key[keyidx] == NULL)
			return -1;
		wep->len[keyidx] = len;
		if (hexstr2bin(val, wep->key[keyidx], len) < 0)
			return -1;
	}

	wep->keys_set++;

	return 0;
}


static int hostapd_parse_rates(int **rate_list, char *val)
{
	int *list;
	int count;
	char *pos, *end;

	os_free(*rate_list);
	*rate_list = NULL;

	pos = val;
	count = 0;
	while (*pos != '\0') {
		if (*pos == ' ')
			count++;
		pos++;
	}

	list = os_malloc(sizeof(int) * (count + 2));
	if (list == NULL)
		return -1;
	pos = val;
	count = 0;
	while (*pos != '\0') {
		end = os_strchr(pos, ' ');
		if (end)
			*end = '\0';

		list[count++] = atoi(pos);
		if (!end)
			break;
		pos = end + 1;
	}
	list[count] = -1;

	*rate_list = list;
	return 0;
}


static int hostapd_config_bss(struct hostapd_config *conf, const char *ifname)
{
	struct hostapd_bss_config *bss;

	if (*ifname == '\0')
		return -1;

	bss = os_realloc(conf->bss, (conf->num_bss + 1) *
			 sizeof(struct hostapd_bss_config));
	if (bss == NULL) {
		wpa_printf(MSG_ERROR, "Failed to allocate memory for "
			   "multi-BSS entry");
		return -1;
	}
	conf->bss = bss;

	bss = &(conf->bss[conf->num_bss]);
	os_memset(bss, 0, sizeof(*bss));
	bss->radius = os_zalloc(sizeof(*bss->radius));
	if (bss->radius == NULL) {
		wpa_printf(MSG_ERROR, "Failed to allocate memory for "
			   "multi-BSS RADIUS data");
		return -1;
	}

	conf->num_bss++;
	conf->last_bss = bss;

	hostapd_config_defaults_bss(bss);
	os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
	os_memcpy(bss->ssid.vlan, bss->iface, IFNAMSIZ + 1);

	return 0;
}


static int valid_cw(int cw)
{
	return (cw == 1 || cw == 3 || cw == 7 || cw == 15 || cw == 31 ||
		cw == 63 || cw == 127 || cw == 255 || cw == 511 || cw == 1023);
}


enum {
	IEEE80211_TX_QUEUE_DATA0 = 0, /* used for EDCA AC_VO data */
	IEEE80211_TX_QUEUE_DATA1 = 1, /* used for EDCA AC_VI data */
	IEEE80211_TX_QUEUE_DATA2 = 2, /* used for EDCA AC_BE data */
	IEEE80211_TX_QUEUE_DATA3 = 3, /* used for EDCA AC_BK data */
	IEEE80211_TX_QUEUE_DATA4 = 4,
	IEEE80211_TX_QUEUE_AFTER_BEACON = 6,
	IEEE80211_TX_QUEUE_BEACON = 7
};

static int hostapd_config_tx_queue(struct hostapd_config *conf, char *name,
				   char *val)
{
	int num;
	char *pos;
	struct hostapd_tx_queue_params *queue;

	/* skip 'tx_queue_' prefix */
	pos = name + 9;
	if (os_strncmp(pos, "data", 4) == 0 &&
	    pos[4] >= '0' && pos[4] <= '9' && pos[5] == '_') {
		num = pos[4] - '0';
		pos += 6;
	} else if (os_strncmp(pos, "after_beacon_", 13) == 0) {
		num = IEEE80211_TX_QUEUE_AFTER_BEACON;
		pos += 13;
	} else if (os_strncmp(pos, "beacon_", 7) == 0) {
		num = IEEE80211_TX_QUEUE_BEACON;
		pos += 7;
	} else {
		wpa_printf(MSG_ERROR, "Unknown tx_queue name '%s'", pos);
		return -1;
	}

	queue = &conf->tx_queue[num];

	if (os_strcmp(pos, "aifs") == 0) {
		queue->aifs = atoi(val);
		if (queue->aifs < 0 || queue->aifs > 255) {
			wpa_printf(MSG_ERROR, "Invalid AIFS value %d",
				   queue->aifs);
			return -1;
		}
	} else if (os_strcmp(pos, "cwmin") == 0) {
		queue->cwmin = atoi(val);
		if (!valid_cw(queue->cwmin)) {
			wpa_printf(MSG_ERROR, "Invalid cwMin value %d",
				   queue->cwmin);
			return -1;
		}
	} else if (os_strcmp(pos, "cwmax") == 0) {
		queue->cwmax = atoi(val);
		if (!valid_cw(queue->cwmax)) {
			wpa_printf(MSG_ERROR, "Invalid cwMax value %d",
				   queue->cwmax);
			return -1;
		}
	} else if (os_strcmp(pos, "burst") == 0) {
		queue->burst = hostapd_config_read_int10(val);
	} else {
		wpa_printf(MSG_ERROR, "Unknown tx_queue field '%s'", pos);
		return -1;
	}

	queue->configured = 1;

	return 0;
}


static int hostapd_config_wme_ac(struct hostapd_config *conf, char *name,
				   char *val)
{
	int num, v;
	char *pos;
	struct hostapd_wme_ac_params *ac;

	/* skip 'wme_ac_' prefix */
	pos = name + 7;
	if (os_strncmp(pos, "be_", 3) == 0) {
		num = 0;
		pos += 3;
	} else if (os_strncmp(pos, "bk_", 3) == 0) {
		num = 1;
		pos += 3;
	} else if (os_strncmp(pos, "vi_", 3) == 0) {
		num = 2;
		pos += 3;
	} else if (os_strncmp(pos, "vo_", 3) == 0) {
		num = 3;
		pos += 3;
	} else {
		wpa_printf(MSG_ERROR, "Unknown wme name '%s'", pos);
		return -1;
	}

	ac = &conf->wme_ac_params[num];

	if (os_strcmp(pos, "aifs") == 0) {
		v = atoi(val);
		if (v < 1 || v > 255) {
			wpa_printf(MSG_ERROR, "Invalid AIFS value %d", v);
			return -1;
		}
		ac->aifs = v;
	} else if (os_strcmp(pos, "cwmin") == 0) {
		v = atoi(val);
		if (v < 0 || v > 12) {
			wpa_printf(MSG_ERROR, "Invalid cwMin value %d", v);
			return -1;
		}
		ac->cwmin = v;
	} else if (os_strcmp(pos, "cwmax") == 0) {
		v = atoi(val);
		if (v < 0 || v > 12) {
			wpa_printf(MSG_ERROR, "Invalid cwMax value %d", v);
			return -1;
		}
		ac->cwmax = v;
	} else if (os_strcmp(pos, "txop_limit") == 0) {
		v = atoi(val);
		if (v < 0 || v > 0xffff) {
			wpa_printf(MSG_ERROR, "Invalid txop value %d", v);
			return -1;
		}
		ac->txopLimit = v;
	} else if (os_strcmp(pos, "acm") == 0) {
		v = atoi(val);
		if (v < 0 || v > 1) {
			wpa_printf(MSG_ERROR, "Invalid acm value %d", v);
			return -1;
		}
		ac->admission_control_mandatory = v;
	} else {
		wpa_printf(MSG_ERROR, "Unknown wme_ac_ field '%s'", pos);
		return -1;
	}

	return 0;
}


#ifdef CONFIG_IEEE80211R
static int add_r0kh(struct hostapd_bss_config *bss, char *value)
{
	struct ft_remote_r0kh *r0kh;
	char *pos, *next;

	r0kh = os_zalloc(sizeof(*r0kh));
	if (r0kh == NULL)
		return -1;

	/* 02:01:02:03:04:05 a.example.com 000102030405060708090a0b0c0d0e0f */
	pos = value;
	next = os_strchr(pos, ' ');
	if (next)
		*next++ = '\0';
	if (next == NULL || hwaddr_aton(pos, r0kh->addr)) {
		wpa_printf(MSG_ERROR, "Invalid R0KH MAC address: '%s'", pos);
		os_free(r0kh);
		return -1;
	}

	pos = next;
	next = os_strchr(pos, ' ');
	if (next)
		*next++ = '\0';
	if (next == NULL || next - pos > FT_R0KH_ID_MAX_LEN) {
		wpa_printf(MSG_ERROR, "Invalid R0KH-ID: '%s'", pos);
		os_free(r0kh);
		return -1;
	}
	r0kh->id_len = next - pos - 1;
	os_memcpy(r0kh->id, pos, r0kh->id_len);

	pos = next;
	if (hexstr2bin(pos, r0kh->key, sizeof(r0kh->key))) {
		wpa_printf(MSG_ERROR, "Invalid R0KH key: '%s'", pos);
		os_free(r0kh);
		return -1;
	}

	r0kh->next = bss->r0kh_list;
	bss->r0kh_list = r0kh;

	return 0;
}


static int add_r1kh(struct hostapd_bss_config *bss, char *value)
{
	struct ft_remote_r1kh *r1kh;
	char *pos, *next;

	r1kh = os_zalloc(sizeof(*r1kh));
	if (r1kh == NULL)
		return -1;

	/* 02:01:02:03:04:05 02:01:02:03:04:05
	 * 000102030405060708090a0b0c0d0e0f */
	pos = value;
	next = os_strchr(pos, ' ');
	if (next)
		*next++ = '\0';
	if (next == NULL || hwaddr_aton(pos, r1kh->addr)) {
		wpa_printf(MSG_ERROR, "Invalid R1KH MAC address: '%s'", pos);
		os_free(r1kh);
		return -1;
	}

	pos = next;
	next = os_strchr(pos, ' ');
	if (next)
		*next++ = '\0';
	if (next == NULL || hwaddr_aton(pos, r1kh->id)) {
		wpa_printf(MSG_ERROR, "Invalid R1KH-ID: '%s'", pos);
		os_free(r1kh);
		return -1;
	}

	pos = next;
	if (hexstr2bin(pos, r1kh->key, sizeof(r1kh->key))) {
		wpa_printf(MSG_ERROR, "Invalid R1KH key: '%s'", pos);
		os_free(r1kh);
		return -1;
	}

	r1kh->next = bss->r1kh_list;
	bss->r1kh_list = r1kh;

	return 0;
}
#endif /* CONFIG_IEEE80211R */


#ifdef CONFIG_IEEE80211N
static int hostapd_config_ht_capab(struct hostapd_config *conf,
				   const char *capab)
{
	if (os_strstr(capab, "[LDPC]"))
		conf->ht_capab |= HT_CAP_INFO_LDPC_CODING_CAP;
	if (os_strstr(capab, "[HT40-]")) {
		conf->ht_capab |= HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
		conf->secondary_channel = -1;
	}
	if (os_strstr(capab, "[HT40+]")) {
		conf->ht_capab |= HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
		conf->secondary_channel = 1;
	}
	if (os_strstr(capab, "[SMPS-STATIC]")) {
		conf->ht_capab &= ~HT_CAP_INFO_SMPS_MASK;
		conf->ht_capab |= HT_CAP_INFO_SMPS_STATIC;
	}
	if (os_strstr(capab, "[SMPS-DYNAMIC]")) {
		conf->ht_capab &= ~HT_CAP_INFO_SMPS_MASK;
		conf->ht_capab |= HT_CAP_INFO_SMPS_DYNAMIC;
	}
	if (os_strstr(capab, "[GF]"))
		conf->ht_capab |= HT_CAP_INFO_GREEN_FIELD;
	if (os_strstr(capab, "[SHORT-GI-20]"))
		conf->ht_capab |= HT_CAP_INFO_SHORT_GI20MHZ;
	if (os_strstr(capab, "[SHORT-GI-40]"))
		conf->ht_capab |= HT_CAP_INFO_SHORT_GI40MHZ;
	if (os_strstr(capab, "[TX-STBC]"))
		conf->ht_capab |= HT_CAP_INFO_TX_STBC;
	if (os_strstr(capab, "[RX-STBC1]")) {
		conf->ht_capab &= ~HT_CAP_INFO_RX_STBC_MASK;
		conf->ht_capab |= HT_CAP_INFO_RX_STBC_1;
	}
	if (os_strstr(capab, "[RX-STBC12]")) {
		conf->ht_capab &= ~HT_CAP_INFO_RX_STBC_MASK;
		conf->ht_capab |= HT_CAP_INFO_RX_STBC_12;
	}
	if (os_strstr(capab, "[RX-STBC123]")) {
		conf->ht_capab &= ~HT_CAP_INFO_RX_STBC_MASK;
		conf->ht_capab |= HT_CAP_INFO_RX_STBC_123;
	}
	if (os_strstr(capab, "[DELAYED-BA]"))
		conf->ht_capab |= HT_CAP_INFO_DELAYED_BA;
	if (os_strstr(capab, "[MAX-AMSDU-7935]"))
		conf->ht_capab |= HT_CAP_INFO_MAX_AMSDU_SIZE;
	if (os_strstr(capab, "[DSSS_CCK-40]"))
		conf->ht_capab |= HT_CAP_INFO_DSSS_CCK40MHZ;
	if (os_strstr(capab, "[PSMP]"))
		conf->ht_capab |= HT_CAP_INFO_PSMP_SUPP;
	if (os_strstr(capab, "[LSIG-TXOP-PROT]"))
		conf->ht_capab |= HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT;

	return 0;
}
#endif /* CONFIG_IEEE80211N */


/**
 * hostapd_config_read - Read and parse a configuration file
 * @fname: Configuration file name (including path, if needed)
 * Returns: Allocated configuration data structure
 */
struct hostapd_config * hostapd_config_read(const char *fname)
{
	struct hostapd_config *conf;
	struct hostapd_bss_config *bss;
	FILE *f;
	char buf[256], *pos;
	int line = 0;
	int errors = 0;
	int pairwise;
	size_t i;

	f = fopen(fname, "r");
	if (f == NULL) {
		wpa_printf(MSG_ERROR, "Could not open configuration file '%s' "
			   "for reading.", fname);
		return NULL;
	}

	conf = hostapd_config_defaults();
	if (conf == NULL) {
		fclose(f);
		return NULL;
	}
	bss = conf->last_bss = conf->bss;

	while (fgets(buf, sizeof(buf), f)) {
		bss = conf->last_bss;
		line++;

		if (buf[0] == '#')
			continue;
		pos = buf;
		while (*pos != '\0') {
			if (*pos == '\n') {
				*pos = '\0';
				break;
			}
			pos++;
		}
		if (buf[0] == '\0')
			continue;

		pos = os_strchr(buf, '=');
		if (pos == NULL) {
			wpa_printf(MSG_ERROR, "Line %d: invalid line '%s'",
				   line, buf);
			errors++;
			continue;
		}
		*pos = '\0';
		pos++;

		if (os_strcmp(buf, "interface") == 0) {
			os_strlcpy(conf->bss[0].iface, pos,
				   sizeof(conf->bss[0].iface));
		} else if (os_strcmp(buf, "bridge") == 0) {
			os_strlcpy(bss->bridge, pos, sizeof(bss->bridge));
		} else if (os_strcmp(buf, "driver") == 0) {
			int i;
			/* clear to get error below if setting is invalid */
			conf->driver = NULL;
			for (i = 0; hostapd_drivers[i]; i++) {
				if (os_strcmp(pos, hostapd_drivers[i]->name) ==
				    0) {
					conf->driver = hostapd_drivers[i];
					break;
				}
			}
			if (conf->driver == NULL) {
				wpa_printf(MSG_ERROR, "Line %d: invalid/"
					   "unknown driver '%s'", line, pos);
				errors++;
			}
		} else if (os_strcmp(buf, "debug") == 0) {
			wpa_printf(MSG_DEBUG, "Line %d: DEPRECATED: 'debug' "
				   "configuration variable is not used "
				   "anymore", line);
		} else if (os_strcmp(buf, "logger_syslog_level") == 0) {
			bss->logger_syslog_level = atoi(pos);
		} else if (os_strcmp(buf, "logger_stdout_level") == 0) {
			bss->logger_stdout_level = atoi(pos);
		} else if (os_strcmp(buf, "logger_syslog") == 0) {
			bss->logger_syslog = atoi(pos);