/*
 * wpa_gui - NetworkConfig class
 * Copyright (c) 2005-2006, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include <QMessageBox>

#include "networkconfig.h"
#include "wpagui.h"

enum {
    AUTH_NONE = 0,
    AUTH_IEEE8021X = 1,
    AUTH_WPA_PSK = 2,
    AUTH_WPA_EAP = 3,
    AUTH_WPA2_PSK = 4,
    AUTH_WPA2_EAP = 5
};

#define WPA_GUI_KEY_DATA "[key is configured]"


NetworkConfig::NetworkConfig(QWidget *parent, const char *, bool, Qt::WFlags)
	: QDialog(parent)
{
	setupUi(this);

	connect(authSelect, SIGNAL(activated(int)), this,
		SLOT(authChanged(int)));
	connect(cancelButton, SIGNAL(clicked()), this, SLOT(close()));
	connect(addButton, SIGNAL(clicked()), this, SLOT(addNetwork()));
	connect(encrSelect, SIGNAL(activated(const QString &)), this,
		SLOT(encrChanged(const QString &)));
	connect(removeButton, SIGNAL(clicked()), this, SLOT(removeNetwork()));

	wpagui = NULL;
	new_network = false;
}


NetworkConfig::~NetworkConfig()
{
}


void NetworkConfig::languageChange()
{
	retranslateUi(this);
}


void NetworkConfig::paramsFromScanResults(Q3ListViewItem *sel)
{
	new_network = true;

	/* SSID BSSID frequency signal flags */
	setCaption(sel->text(0));
	ssidEdit->setText(sel->text(0));

	QString flags = sel->text(4);
	int auth, encr = 0;
	if (flags.find("[WPA2-EAP") >= 0)
		auth = AUTH_WPA2_EAP;
	else if (flags.find("[WPA-EAP") >= 0)
		auth = AUTH_WPA_EAP;
	else if (flags.find("[WPA2-PSK") >= 0)
		auth = AUTH_WPA2_PSK;
	else if (flags.find("[WPA-PSK") >= 0)
		auth = AUTH_WPA_PSK;
	else
		auth = AUTH_NONE;

	if (flags.find("-CCMP") >= 0)
		encr = 1;
	else if (flags.find("-TKIP") >= 0)
		encr = 0;
	else if (flags.find("WEP") >= 0)
		encr = 1;
	else
		encr = 0;

	authSelect->setCurrentItem(auth);
	authChanged(auth);
	encrSelect->setCurrentItem(encr);

	getEapCapa();
}


void NetworkConfig::authChanged(int sel)
{
	pskEdit->setEnabled(sel == AUTH_WPA_PSK || sel == AUTH_WPA2_PSK);
	bool eap = sel == AUTH_IEEE8021X || sel == AUTH_WPA_EAP ||
		sel == AUTH_WPA2_EAP;
	eapSelect->setEnabled(eap);
	identityEdit->setEnabled(eap);
	passwordEdit->setEnabled(eap);
	cacertEdit->setEnabled(eap);

	while (encrSelect->count())
		encrSelect->removeItem(0);

	if (sel == AUTH_NONE || sel == AUTH_IEEE8021X) {
		encrSelect->insertItem("None");
		encrSelect->insertItem("WEP");
		encrSelect->setCurrentItem(sel == AUTH_NONE ? 0 : 1);
	} else {
		encrSelect->insertItem("TKIP");
		encrSelect->insertItem("CCMP");
		encrSelect->setCurrentItem((sel == AUTH_WPA2_PSK ||
					    sel == AUTH_WPA2_EAP) ? 1 : 0);
	}

	wepEnabled(sel == AUTH_IEEE8021X);
}


void NetworkConfig::addNetwork()
{
	char reply[10], cmd[256];
	size_t reply_len;
	int id;
	int psklen = pskEdit->text().length();
	int auth = authSelect->currentItem();

	if (auth == AUTH_WPA_PSK || auth == AUTH_WPA2_PSK) {
		if (psklen < 8 || psklen > 64) {
			QMessageBox::warning(this, "wpa_gui",
					     "WPA-PSK requires a passphrase "
					     "of 8 to 63 characters\n"
					     "or 64 hex digit PSK");
			return;
		}
	}

	if (wpagui == NULL)
		return;

	memset(reply, 0, sizeof(reply));
	reply_len = sizeof(reply) - 1;

	if (new_network) {
		wpagui->ctrlRequest("ADD_NETWORK", reply, &reply_len);
		if (reply[0] == 'F') {
			QMessageBox::warning(this, "wpa_gui", "Failed to add "
					     "network to wpa_supplicant\n"
					     "configuration.");
			return;
		}
		id = atoi(reply);
	} else
		id = edit_network_id;

	setNetworkParam(id, "ssid", ssidEdit->text().ascii(), true);

	char *key_mgmt = NULL, *proto = NULL, *pairwise = NULL;
	switch (auth) {
	case AUTH_NONE:
		key_mgmt = "NONE";
		break;
	case AUTH_IEEE8021X:
		key_mgmt = "IEEE8021X";
		break;
	case AUTH_WPA_PSK:
		key_mgmt = "WPA-PSK";
		proto = "WPA";
		break;
	case AUTH_WPA_EAP:
		key_mgmt = "WPA-EAP";
		proto = "WPA";
		break;
	case AUTH_WPA2_PSK:
		key_mgmt = "WPA-PSK";
		proto = "WPA2";
		break;
	case AUTH_WPA2_EAP:
		key_mgmt = "WPA-EAP";
		proto = "WPA2";
		break;
	}

	if (auth == AUTH_WPA_PSK || auth == AUTH_WPA_EAP ||
	    auth == AUTH_WPA2_PSK || auth == AUTH_WPA2_EAP) {
		int encr = encrSelect->currentItem();
		if (encr == 0)
			pairwise = "TKIP";
		else
			pairwise = "CCMP";
	}

	if (proto)
		setNetworkParam(id, "proto", proto, false);
	if (key_mgmt)
		setNetworkParam(id, "key_mgmt", key_mgmt, false);
	if (pairwise) {
		setNetworkParam(id, "pairwise", pairwise, false);
		setNetworkParam(id, "group", "TKIP CCMP WEP104 WEP40", false);
	}
	if (pskEdit->isEnabled() &&
	    strcmp(passwordEdit->text().ascii(), WPA_GUI_KEY_DATA) != 0)
		setNetworkParam(id, "psk", pskEdit->text().ascii(),
				psklen != 64);
	if (eapSelect->isEnabled())
		setNetworkParam(id, "eap", eapSelect->currentText().ascii(),
				false);
	if (identityEdit->isEnabled())
		setNetworkParam(id, "identity", identityEdit->text().ascii(),
				true);
	if (passwordEdit->isEnabled() &&
	    strcmp(passwordEdit->text().ascii(), WPA_GUI_KEY_DATA) != 0)
		setNetworkParam(id, "password", passwordEdit->text().ascii(),
				true);
	if (cacertEdit->isEnabled())
		setNetworkParam(id, "ca_cert", cacertEdit->text().ascii(),
				true);
	writeWepKey(id, wep0Edit, 0);
	writeWepKey(id, wep1Edit, 1);
	writeWepKey(id, wep2Edit, 2);
	writeWepKey(id, wep3Edit, 3);

	if (wep0Radio->isEnabled() && wep0Radio->isChecked())
		setNetworkParam(id, "wep_tx_keyidx", "0", false);
	else if (wep1Radio->isEnabled() && wep1Radio->isChecked())
		setNetworkParam(id, "wep_tx_keyidx", "1", false);
	else if (wep2Radio->isEnabled() && wep2Radio->isChecked())
		setNetworkParam(id, "wep_tx_keyidx", "2", false);
	else if (wep3Radio->isEnabled() && wep3Radio->isChecked())
		setNetworkParam(id, "wep_tx_keyidx", "3", false);

	snprintf(cmd, sizeof(cmd), "ENABLE_NETWORK %d", id);
	reply_len = sizeof(reply);
	wpagui->ctrlRequest(cmd, reply, &reply_len);
	if (strncmp(reply, "OK", 2) != 0) {
		QMessageBox::warning(this, "wpa_gui", "Failed to enable "
				     "network in wpa_supplicant\n"
				     "configuration.");
		/* Network was added, so continue anyway */
	}
	wpagui->triggerUpdate();
	wpagui->ctrlRequest("SAVE_CONFIG", reply, &reply_len);

	close();
}


void NetworkConfig::setWpaGui(WpaGui *_wpagui)
{
	wpagui = _wpagui;
}


int NetworkConfig::setNetworkParam(int id, const char *field,
				   const char *value, bool quote)
{
	char reply[10], cmd[256];
	size_t reply_len;
	snprintf(cmd, sizeof(cmd), "SET_NETWORK %d %s %s%s%s",
		 id, field, quote ? "\"" : "", value, quote ? "\"" : "");
	reply_len = sizeof(reply);
	wpagui->ctrlRequest(cmd, reply, &reply_len);
	return strncmp(reply, "OK", 2) == 0 ? 0 : -1;
}


void NetworkConfig::encrChanged(const QString &sel)
{
	wepEnabled(sel.find("WEP") == 0);
}


void NetworkConfig::wepEnabled(bool enabled)
{
	wep0Edit->setEnabled(enabled);
	wep1Edit->setEnabled(enabled);
	wep2Edit->setEnabled(enabled);
	wep3Edit->setEnabled(enabled);
	wep0Radio->setEnabled(enabled);
	wep1Radio->setEnabled(enabled);
	wep2Radio->setEnabled(enabled);
	wep3Radio->setEnabled(enabled);
}


void NetworkConfig::writeWepKey(int network_id, QLineEdit *edit, int id)
{
	char buf[10];
	bool hex;
	const char *txt, *pos;
	size_t len;

	if (!edit->isEnabled() || edit->text().isEmpty())
		return;

	/*
	 * Assume hex key if only hex characters are present and length matches
	 * with 40, 104, or 128-bit key
	 */
	txt = edit->text().ascii();
	if (strcmp(txt, WPA_GUI_KEY_DATA) == 0)
		return;
	len = strlen(txt);
	if (len == 0)
		return;
	pos = txt;
	hex = true;
	while (*pos) {
		if (!((*pos >= '0' && *pos <= '9') ||
		      (*pos >= 'a' && *pos <= 'f') ||
		      (*pos >= 'A' && *pos <= 'F'))) {
			hex = false;
			break;
		}
		pos++;
	}
	if (hex && len != 10 && len != 26 && len != 32)
		hex = false;
	snprintf(buf, sizeof(buf), "wep_key%d", id);
	setNetworkParam(network_id, buf, txt, !hex);
}


static int key_value_isset(const char *reply, size_t reply_len)
{
    return reply_len > 0 && (reply_len < 4 || memcmp(reply, "FAIL", 4) != 0);
}


void NetworkConfig::paramsFromConfig(int network_id)
{
	int i, res;

	edit_network_id = network_id;
	getEapCapa();

	char reply[1024], cmd[256], *pos;
	size_t reply_len;

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d ssid", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0 &&
	    reply_len >= 2 && reply[0] == '"') {
		reply[reply_len] = '\0';
		pos = strchr(reply + 1, '"');
		if (pos)
			*pos = '\0';
		ssidEdit->setText(reply + 1);
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d proto", network_id);
	reply_len = sizeof(reply) - 1;
	int wpa = 0;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0) {
		reply[reply_len] = '\0';
		if (strstr(reply, "RSN") || strstr(reply, "WPA2"))
			wpa = 2;
		else if (strstr(reply, "WPA"))
			wpa = 1;
	}

	int auth = AUTH_NONE, encr = 0;
	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d key_mgmt", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0) {
		reply[reply_len] = '\0';
		if (strstr(reply, "WPA-EAP"))
			auth = wpa & 2 ? AUTH_WPA2_EAP : AUTH_WPA_EAP;
		else if (strstr(reply, "WPA-PSK"))
			auth = wpa & 2 ? AUTH_WPA2_PSK : AUTH_WPA_PSK;
		else if (strstr(reply, "IEEE8021X")) {
			auth = AUTH_IEEE8021X;
			encr = 1;
		}
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d pairwise", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0) {
		reply[reply_len] = '\0';
		if (strstr(reply, "CCMP"))
			encr = 1;
		else if (strstr(reply, "TKIP"))
			encr = 0;
		else if (strstr(reply, "WEP"))
			encr = 1;
		else
			encr = 0;
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d psk", network_id);
	reply_len = sizeof(reply) - 1;
	res = wpagui->ctrlRequest(cmd, reply, &reply_len);
	if (res >= 0 && reply_len >= 2 && reply[0] == '"') {
		reply[reply_len] = '\0';
		pos = strchr(reply + 1, '"');
		if (pos)
			*pos = '\0';
		pskEdit->setText(reply + 1);
	} else if (res >= 0 && key_value_isset(reply, reply_len)) {
		pskEdit->setText(WPA_GUI_KEY_DATA);
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d identity", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0 &&
	    reply_len >= 2 && reply[0] == '"') {
		reply[reply_len] = '\0';
		pos = strchr(reply + 1, '"');
		if (pos)
			*pos = '\0';
		identityEdit->setText(reply + 1);
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d password", network_id);
	reply_len = sizeof(reply) - 1;
	res = wpagui->ctrlRequest(cmd, reply, &reply_len);
	if (res >= 0 && reply_len >= 2 && reply[0] == '"') {
		reply[reply_len] = '\0';
		pos = strchr(reply + 1, '"');
		if (pos)
			*pos = '\0';
		passwordEdit->setText(reply + 1);
	} else if (res >= 0 && key_value_isset(reply, reply_len)) {
		passwordEdit->setText(WPA_GUI_KEY_DATA);
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d ca_cert", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0 &&
	    reply_len >= 2 && reply[0] == '"') {
		reply[reply_len] = '\0';
		pos = strchr(reply + 1, '"');
		if (pos)
			*pos = '\0';
		cacertEdit->setText(reply + 1);
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d eap", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0 &&
	    reply_len >= 1) {
		reply[reply_len] = '\0';
		for (i = 0; i < eapSelect->count(); i++) {
			if (eapSelect->text(i).compare(reply) == 0) {
				eapSelect->setCurrentItem(i);
				break;
			}
		}
	}

	for (i = 0; i < 4; i++) {
		QLineEdit *wepEdit;
		switch (i) {
		default:
		case 0:
			wepEdit = wep0Edit;
			break;
		case 1:
			wepEdit = wep1Edit;
			break;
		case 2:
			wepEdit = wep2Edit;
			break;
		case 3:
			wepEdit = wep3Edit;
			break;
		}
		snprintf(cmd, sizeof(cmd), "GET_NETWORK %d wep_key%d",
			 network_id, i);
		reply_len = sizeof(reply) - 1;
		res = wpagui->ctrlRequest(cmd, reply, &reply_len);
		if (res >= 0 && reply_len >= 2 && reply[0] == '"') {
			reply[reply_len] = '\0';
			pos = strchr(reply + 1, '"');
			if (pos)
				*pos = '\0';
			if (auth == AUTH_NONE || auth == AUTH_IEEE8021X)
				encr = 1;

			wepEdit->setText(reply + 1);
		} else if (res >= 0 && key_value_isset(reply, reply_len)) {
			if (auth == AUTH_NONE || auth == AUTH_IEEE8021X)
				encr = 1;
			wepEdit->setText(WPA_GUI_KEY_DATA);
		}
	}

	snprintf(cmd, sizeof(cmd), "GET_NETWORK %d wep_tx_keyidx", network_id);
	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest(cmd, reply, &reply_len) >= 0 && reply_len >= 1)
	{
		reply[reply_len] = '\0';
		switch (atoi(reply)) {
		case 0:
			wep0Radio->setChecked(true);
			break;
		case 1:
			wep1Radio->setChecked(true);
			break;
		case 2:
			wep2Radio->setChecked(true);
			break;
		case 3:
			wep3Radio->setChecked(true);
			break;
		}
	}

	authSelect->setCurrentItem(auth);
	authChanged(auth);
	encrSelect->setCurrentItem(encr);
	if (auth == AUTH_NONE || auth == AUTH_IEEE8021X)
		wepEnabled(encr == 1);

	removeButton->setEnabled(true);
	addButton->setText("Save");
}


void NetworkConfig::removeNetwork()
{
	char reply[10], cmd[256];
	size_t reply_len;

	if (QMessageBox::information(this, "wpa_gui",
				     "This will permanently remove the "
				     "network\n"
				     "from the configuration. Do you really "
				     "want\n"
				     "to remove this network?", "Yes", "No")
	    != 0)
		return;

	snprintf(cmd, sizeof(cmd), "REMOVE_NETWORK %d", edit_network_id);
	reply_len = sizeof(reply);
	wpagui->ctrlRequest(cmd, reply, &reply_len);
	if (strncmp(reply, "OK", 2) != 0) {
		QMessageBox::warning(this, "wpa_gui",
				     "Failed to remove network from "
				     "wpa_supplicant\n"
				     "configuration.");
	} else {
		wpagui->triggerUpdate();
		wpagui->ctrlRequest("SAVE_CONFIG", reply, &reply_len);
	}

	close();
}


void NetworkConfig::newNetwork()
{
	new_network = true;
	getEapCapa();
}


void NetworkConfig::getEapCapa()
{
	char reply[256];
	size_t reply_len;

	if (wpagui == NULL)
		return;

	reply_len = sizeof(reply) - 1;
	if (wpagui->ctrlRequest("GET_CAPABILITY eap", reply, &reply_len) < 0)
		return;
	reply[reply_len] = '\0';

	QString res(reply);
	QStringList types = QStringList::split(QChar(' '), res);
	eapSelect->insertStringList(types);
}
