config_file.c

一个Linux下无线网卡的设置工具

		} else if (strncmp(pos, "dot11RSNAConfigPMKLifetime=", 27) ==
			   0) {
			config->dot11RSNAConfigPMKLifetime = atoi(pos + 27);
			wpa_printf(MSG_DEBUG, "dot11RSNAConfigPMKLifetime=%d",
				   config->dot11RSNAConfigPMKLifetime);
		} else if (strncmp(pos, "dot11RSNAConfigPMKReauthThreshold=",
				   34) ==
			   0) {
			config->dot11RSNAConfigPMKReauthThreshold =
				atoi(pos + 34);
			wpa_printf(MSG_DEBUG,
				   "dot11RSNAConfigPMKReauthThreshold=%d",
				   config->dot11RSNAConfigPMKReauthThreshold);
		} else if (strncmp(pos, "dot11RSNAConfigSATimeout=", 25) ==
			   0) {
			config->dot11RSNAConfigSATimeout = atoi(pos + 25);
			wpa_printf(MSG_DEBUG, "dot11RSNAConfigSATimeout=%d",
				   config->dot11RSNAConfigSATimeout);
		} else if (strncmp(pos, "update_config=", 14) == 0) {
			config->update_config = atoi(pos + 14);
			wpa_printf(MSG_DEBUG, "update_config=%d",
				   config->update_config);
		} else {
			wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
				   "line '%s'.", line, pos);
			errors++;
			continue;
		}
	}

	fclose(f);

	config->ssid = head;
	for (prio = 0; prio < config->num_prio; prio++) {
		ssid = config->pssid[prio];
		wpa_printf(MSG_DEBUG, "Priority group %d",
			   ssid->priority);
		while (ssid) {
			wpa_printf(MSG_DEBUG, "   id=%d ssid='%s'",
				   ssid->id,
				   wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
			ssid = ssid->pnext;
		}
	}
	if (errors) {
		wpa_config_free(config);
		config = NULL;
		head = NULL;
	}

	return config;
}


static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
{
	char *value = wpa_config_get(ssid, field);
	if (value == NULL)
		return;
	fprintf(f, "\t%s=%s\n", field, value);
	free(value);
}


static void write_int(FILE *f, const char *field, int value, int def)
{
	if (value == def)
		return;
	fprintf(f, "\t%s=%d\n", field, value);
}


static void write_bssid(FILE *f, struct wpa_ssid *ssid)
{
	char *value = wpa_config_get(ssid, "bssid");
	if (value == NULL)
		return;
	fprintf(f, "\tbssid=%s\n", value);
	free(value);
}


static void write_psk(FILE *f, struct wpa_ssid *ssid)
{
	char *value = wpa_config_get(ssid, "psk");
	if (value == NULL)
		return;
	fprintf(f, "\tpsk=%s\n", value);
	free(value);
}


static void write_proto(FILE *f, struct wpa_ssid *ssid)
{
	char *value;

	if (ssid->proto == DEFAULT_PROTO)
		return;

	value = wpa_config_get(ssid, "proto");
	if (value == NULL)
		return;
	if (value[0])
		fprintf(f, "\tproto=%s\n", value);
	free(value);
}


static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
{
	char *value;

	if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
		return;

	value = wpa_config_get(ssid, "key_mgmt");
	if (value == NULL)
		return;
	if (value[0])
		fprintf(f, "\tkey_mgmt=%s\n", value);
	free(value);
}


static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
{
	char *value;

	if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
		return;

	value = wpa_config_get(ssid, "pairwise");
	if (value == NULL)
		return;
	if (value[0])
		fprintf(f, "\tpairwise=%s\n", value);
	free(value);
}


static void write_group(FILE *f, struct wpa_ssid *ssid)
{
	char *value;

	if (ssid->group_cipher == DEFAULT_GROUP)
		return;

	value = wpa_config_get(ssid, "group");
	if (value == NULL)
		return;
	if (value[0])
		fprintf(f, "\tgroup=%s\n", value);
	free(value);
}


static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
{
	char *value;

	if (ssid->auth_alg == 0)
		return;

	value = wpa_config_get(ssid, "auth_alg");
	if (value == NULL)
		return;
	if (value[0])
		fprintf(f, "\tauth_alg=%s\n", value);
	free(value);
}


static void write_eap(FILE *f, struct wpa_ssid *ssid)
{
	char *value;

	value = wpa_config_get(ssid, "eap");
	if (value == NULL)
		return;

	if (value[0])
		fprintf(f, "\teap=%s\n", value);
	free(value);
}


static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
{
	char field[20], *value;

	snprintf(field, sizeof(field), "wep_key%d", idx);
	value = wpa_config_get(ssid, field);
	if (value) {
		fprintf(f, "\t%s=%s\n", field, value);
		free(value);
	}
}


static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
{
	int i;

#define STR(t) write_str(f, #t, ssid)
#define INT(t) write_int(f, #t, ssid->t, 0)
#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)

	STR(ssid);
	INT(scan_ssid);
	write_bssid(f, ssid);
	write_psk(f, ssid);
	write_proto(f, ssid);
	write_key_mgmt(f, ssid);
	write_pairwise(f, ssid);
	write_group(f, ssid);
	write_auth_alg(f, ssid);
	write_eap(f, ssid);
	STR(identity);
	STR(anonymous_identity);
	STR(eappsk);
	STR(nai);
	STR(password);
	STR(ca_cert);
	STR(client_cert);
	STR(private_key);
	STR(private_key_passwd);
	STR(dh_file);
	STR(subject_match);
	STR(altsubject_match);
	STR(ca_cert2);
	STR(client_cert2);
	STR(private_key2);
	STR(private_key2_passwd);
	STR(dh_file2);
	STR(subject_match2);
	STR(altsubject_match2);
	STR(phase1);
	STR(phase2);
	STR(pcsc);
	STR(pin);
	STR(engine_id);
	STR(key_id);
	INT(engine);
	INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
	for (i = 0; i < 4; i++)
		write_wep_key(f, i, ssid);
	INT(wep_tx_keyidx);
	INT(priority);
	INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
	STR(pac_file);
	INT(mode);
	INT(proactive_key_caching);
	INT(disabled);

#undef STR
#undef INT
#undef INT_DEF
}


static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
{
	unsigned char *encoded;

	encoded = base64_encode(blob->data, blob->len, NULL);
	if (encoded == NULL)
		return -1;

	fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
	free(encoded);
	return 0;
}


int wpa_config_write(const char *name, struct wpa_config *config)
{
	FILE *f;
	struct wpa_ssid *ssid;
	struct wpa_config_blob *blob;
	int ret = 0;

	wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);


	f = fopen(name, "w");
	if (f == NULL) {
		wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
		return -1;
	}

#ifdef CONFIG_CTRL_IFACE
	if (config->ctrl_interface)
		fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
#ifndef CONFIG_CTRL_IFACE_UDP
	if (config->ctrl_interface_gid_set) {
		fprintf(f, "ctrl_interface_group=%d\n",
			(int) config->ctrl_interface_gid);
	}
#endif /* CONFIG_CTRL_IFACE_UDP */
#endif /* CONFIG_CTRL_IFACE */
	if (config->eapol_version != DEFAULT_EAPOL_VERSION)
		fprintf(f, "eapol_version=%d\n", config->eapol_version);
	if (config->ap_scan != DEFAULT_AP_SCAN)
		fprintf(f, "ap_scan=%d\n", config->ap_scan);
	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
	if (config->opensc_engine_path)
		fprintf(f, "opensc_engine_path=%s\n",
			config->opensc_engine_path);
	if (config->pkcs11_engine_path)
		fprintf(f, "pkcs11_engine_path=%s\n",
			config->pkcs11_engine_path);
	if (config->pkcs11_module_path)
		fprintf(f, "pkcs11_module_path=%s\n",
			config->pkcs11_module_path);
	if (config->driver_param)
		fprintf(f, "driver_param=%s\n", config->driver_param);
	if (config->dot11RSNAConfigPMKLifetime)
		fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
			config->dot11RSNAConfigPMKLifetime);
	if (config->dot11RSNAConfigPMKReauthThreshold)
		fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
			config->dot11RSNAConfigPMKReauthThreshold);
	if (config->dot11RSNAConfigSATimeout)
		fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
			config->dot11RSNAConfigSATimeout);
	if (config->update_config)
		fprintf(f, "update_config=%d\n", config->update_config);

	for (ssid = config->ssid; ssid; ssid = ssid->next) {
		fprintf(f, "\nnetwork={\n");
		wpa_config_write_network(f, ssid);
		fprintf(f, "}\n");
	}

	for (blob = config->blobs; blob; blob = blob->next) {
		ret = wpa_config_write_blob(f, blob);
		if (ret)
			break;
	}

	fclose(f);

	wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
		   name, ret ? "un" : "");
	return ret;
}