/*
 *  aim_auth.c
 *
 * Deals with the authorizer.
 *
 */

#define FAIM_INTERNAL
#include <aim.h> 

/* this just pushes the passed cookie onto the passed connection -- NO SNAC! */
faim_export int aim_auth_sendcookie(aim_session_t *sess, aim_conn_t *conn, const fu8_t *chipsahoy)
{
	aim_frame_t *fr;
	aim_tlvlist_t *tl = NULL;

	if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x0001, 4+2+2+AIM_COOKIELEN)))
		return -ENOMEM;

	aimbs_put32(&fr->data, 0x00000001);
	aim_addtlvtochain_raw(&tl, 0x0006, AIM_COOKIELEN, chipsahoy);	
	aim_writetlvchain(&fr->data, &tl);
	aim_freetlvchain(&tl);

	aim_tx_enqueue(sess, fr);

	return 0;
}

/*
 * This is sent back as a general response to the login command.
 * It can be either an error or a success, depending on the
 * precense of certain TLVs.  
 *
 * The client should check the value passed as errorcode. If
 * its nonzero, there was an error.
 *
 */
static int parse(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{
	aim_tlvlist_t *tlvlist;
	int ret = 0;
	aim_rxcallback_t userfunc;
	char *sn = NULL, *bosip = NULL, *errurl = NULL, *email = NULL;
	unsigned char *cookie = NULL;
	int errorcode = 0, regstatus = 0;
	int latestbuild = 0, latestbetabuild = 0;
	char *latestrelease = NULL, *latestbeta = NULL;
	char *latestreleaseurl = NULL, *latestbetaurl = NULL;
	char *latestreleaseinfo = NULL, *latestbetainfo = NULL;

	/*
	 * Read block of TLVs.  All further data is derived
	 * from what is parsed here.
	 */
	tlvlist = aim_readtlvchain(bs);

	/*
	 * No matter what, we should have a screen name.
	 */
	memset(sess->sn, 0, sizeof(sess->sn));
	if (aim_gettlv(tlvlist, 0x0001, 1)) {
		sn = aim_gettlv_str(tlvlist, 0x0001, 1);
		strncpy(sess->sn, sn, sizeof(sess->sn));
	}

	/*
	 * Check for an error code.  If so, we should also
	 * have an error url.
	 */
	if (aim_gettlv(tlvlist, 0x0008, 1)) 
		errorcode = aim_gettlv16(tlvlist, 0x0008, 1);
	if (aim_gettlv(tlvlist, 0x0004, 1))
		errurl = aim_gettlv_str(tlvlist, 0x0004, 1);

	/*
	 * BOS server address.
	 */
	if (aim_gettlv(tlvlist, 0x0005, 1))
		bosip = aim_gettlv_str(tlvlist, 0x0005, 1);

	/*
	 * Authorization cookie.
	 */
	if (aim_gettlv(tlvlist, 0x0006, 1)) {
		aim_tlv_t *tmptlv;

		tmptlv = aim_gettlv(tlvlist, 0x0006, 1);

		if ((cookie = malloc(tmptlv->length)))
			memcpy(cookie, tmptlv->value, tmptlv->length);
	}

	/*
	 * The email address attached to this account
	 *   Not available for ICQ logins.
	 */
	if (aim_gettlv(tlvlist, 0x0011, 1))
		email = aim_gettlv_str(tlvlist, 0x0011, 1);

	/*
	 * The registration status.  (Not real sure what it means.)
	 *   Not available for ICQ logins.
	 *
	 *   1 = No disclosure
	 *   2 = Limited disclosure
	 *   3 = Full disclosure
	 *
	 * This has to do with whether your email address is available
	 * to other users or not.  AFAIK, this feature is no longer used.
	 *
	 */
	if (aim_gettlv(tlvlist, 0x0013, 1))
		regstatus = aim_gettlv16(tlvlist, 0x0013, 1);

	if (aim_gettlv(tlvlist, 0x0040, 1))
		latestbetabuild = aim_gettlv32(tlvlist, 0x0040, 1);
	if (aim_gettlv(tlvlist, 0x0041, 1))
		latestbetaurl = aim_gettlv_str(tlvlist, 0x0041, 1);
	if (aim_gettlv(tlvlist, 0x0042, 1))
		latestbetainfo = aim_gettlv_str(tlvlist, 0x0042, 1);
	if (aim_gettlv(tlvlist, 0x0043, 1))
		latestbeta = aim_gettlv_str(tlvlist, 0x0043, 1);
	if (aim_gettlv(tlvlist, 0x0048, 1))
		; /* no idea what this is */

	if (aim_gettlv(tlvlist, 0x0044, 1))
		latestbuild = aim_gettlv32(tlvlist, 0x0044, 1);
	if (aim_gettlv(tlvlist, 0x0045, 1))
		latestreleaseurl = aim_gettlv_str(tlvlist, 0x0045, 1);
	if (aim_gettlv(tlvlist, 0x0046, 1))
		latestreleaseinfo = aim_gettlv_str(tlvlist, 0x0046, 1);
	if (aim_gettlv(tlvlist, 0x0047, 1))
		latestrelease = aim_gettlv_str(tlvlist, 0x0047, 1);
	if (aim_gettlv(tlvlist, 0x0049, 1))
		; /* no idea what this is */


	if ((userfunc = aim_callhandler(sess, rx->conn, snac ? snac->family : 0x0017, snac ? snac->subtype : 0x0003))) {
		/* XXX return as a struct? */
		ret = userfunc(sess, rx, sn, errorcode, errurl, regstatus, email, bosip, cookie, latestrelease, latestbuild, latestreleaseurl, latestreleaseinfo, latestbeta, latestbetabuild, latestbetaurl, latestbetainfo);
	}

	free(sn);
	free(bosip);
	free(errurl);
	free(email);
	free(cookie);
	free(latestrelease);
	free(latestreleaseurl);
	free(latestbeta);
	free(latestbetaurl);
	free(latestreleaseinfo);
	free(latestbetainfo);

	aim_freetlvchain(&tlvlist);

	return ret;
}

/*
 * Middle handler for 0017/0007 SNACs.  Contains the auth key prefixed
 * by only its length in a two byte word.
 *
 * Calls the client, which should then use the value to call aim_send_login.
 *
 */
static int keyparse(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{
	int keylen, ret = 1;
	aim_rxcallback_t userfunc;
	char *keystr;

	keylen = aimbs_get16(bs);
	keystr = aimbs_getstr(bs, keylen);

	if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype)))
		ret = userfunc(sess, rx, keystr);

	free(keystr); 

	return ret;
}

static int snachandler(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs)
{

	if (snac->subtype == 0x0003)
		return parse(sess, mod, rx, snac, bs);
	else if (snac->subtype == 0x0007)
		return keyparse(sess, mod, rx, snac, bs);

	return 0;
}

faim_internal int auth_modfirst(aim_session_t *sess, aim_module_t *mod)
{

	mod->family = 0x0017;
	mod->version = 0x0000;
	mod->flags = 0;
	strncpy(mod->name, "auth", sizeof(mod->name));
	mod->snachandler = snachandler;

	return 0;
}