libpurple/protocols/yahoo/yahoo_filexfer.c

/*
 * @file yahoo_filexfer.c Yahoo Filetransfer
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 */

#include "internal.h"
#include "dnsquery.h"

#include "prpl.h"
#include "util.h"
#include "debug.h"
#include "notify.h"
#include "proxy.h"
#include "ft.h"
#include "yahoo.h"
#include "yahoo_packet.h"
#include "yahoo_filexfer.h"
#include "yahoo_doodle.h"
#include "yahoo_friend.h"

struct yahoo_xfer_data {
	gchar *host;
	gchar *path;
	int port;
	PurpleConnection *gc;
	long expires;
	gboolean started;
	gchar *txbuf;
	gsize txbuflen;
	gsize txbuf_written;
	guint tx_handler;
	gchar *rxqueue;
	guint rxlen;
	gchar *xfer_peer_idstring;
	gchar *xfer_idstring_for_relay;
	int version; /*0 for old, 15 for Y7(YMSG 15)*/
	int info_val_249;

	enum {
		STARTED = 0,
		HEAD_REQUESTED,
		HEAD_REPLY_RECEIVED,
		TRANSFER_PHASE,
		ACCEPTED
	} status_15;

	/* contains all filenames, in case of multiple transfers, with the first
	 * one in the list being the current file's name (ymsg15) */
	GSList *filename_list;
	GSList *size_list; /*corresponds to filename_list, with size as **STRING** */
	gboolean firstoflist;
};

static void yahoo_xfer_data_free(struct yahoo_xfer_data *xd)
{
	PurpleConnection *gc;
	struct yahoo_data *yd;
	PurpleXfer *xfer;
	GSList *l;

	gc = xd->gc;
	yd = gc->proto_data;

	/*remove entry from map*/
	if(xd->xfer_peer_idstring) {
		xfer = g_hash_table_lookup(yd->xfer_peer_idstring_map, xd->xfer_peer_idstring);
		if(xfer)
			g_hash_table_remove(yd->xfer_peer_idstring_map, xd->xfer_peer_idstring);
	}

	/*empty file & filesize list*/
	for (l = xd->filename_list; l; l = l->next) {
		g_free(l->data);
		l->data=NULL;
	}
	for (l = xd->size_list; l; l = l->next) {
		g_free(l->data);
		l->data=NULL;
	}
	g_slist_free(xd->filename_list);
	g_slist_free(xd->size_list);

	g_free(xd->host);
	g_free(xd->path);
	g_free(xd->txbuf);
	g_free(xd->xfer_peer_idstring);
	g_free(xd->xfer_idstring_for_relay);
	if (xd->tx_handler)
		purple_input_remove(xd->tx_handler);
	g_free(xd);
}

static void yahoo_receivefile_send_cb(gpointer data, gint source, PurpleInputCondition condition)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	int remaining, written;

	xfer = data;
	xd = xfer->data;

	remaining = xd->txbuflen - xd->txbuf_written;
	written = write(xfer->fd, xd->txbuf + xd->txbuf_written, remaining);

	if (written < 0 && errno == EAGAIN)
		written = 0;
	else if (written <= 0) {
		purple_debug_error("yahoo", "Unable to write in order to start ft errno = %d\n", errno);
		purple_xfer_cancel_remote(xfer);
		return;
	}

	if (written < remaining) {
		xd->txbuf_written += written;
		return;
	}

	purple_input_remove(xd->tx_handler);
	xd->tx_handler = 0;
	g_free(xd->txbuf);
	xd->txbuf = NULL;
	xd->txbuflen = 0;

	purple_xfer_start(xfer, source, NULL, 0);

}

static void yahoo_receivefile_connected(gpointer data, gint source, const gchar *error_message)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;

	purple_debug(PURPLE_DEBUG_INFO, "yahoo",
			   "AAA - in yahoo_receivefile_connected\n");
	if (!(xfer = data))
		return;
	if (!(xd = xfer->data))
		return;
	if ((source < 0) || (xd->path == NULL) || (xd->host == NULL)) {
		purple_xfer_error(PURPLE_XFER_RECEIVE, purple_xfer_get_account(xfer),
				xfer->who, _("Unable to connect."));
		purple_xfer_cancel_remote(xfer);
		return;
	}

	xfer->fd = source;

	/* The first time we get here, assemble the tx buffer */
	if (xd->txbuflen == 0) {
		xd->txbuf = g_strdup_printf("GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n",
			      xd->path, xd->host);
		xd->txbuflen = strlen(xd->txbuf);
		xd->txbuf_written = 0;
	}

	if (!xd->tx_handler)
	{
		xd->tx_handler = purple_input_add(source, PURPLE_INPUT_WRITE,
			yahoo_receivefile_send_cb, xfer);
		yahoo_receivefile_send_cb(xfer, source, PURPLE_INPUT_WRITE);
	}
}

static void yahoo_sendfile_send_cb(gpointer data, gint source, PurpleInputCondition condition)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	int written, remaining;

	xfer = data;
	xd = xfer->data;

	remaining = xd->txbuflen - xd->txbuf_written;
	written = write(xfer->fd, xd->txbuf + xd->txbuf_written, remaining);

	if (written < 0 && errno == EAGAIN)
		written = 0;
	else if (written <= 0) {
		purple_debug_error("yahoo", "Unable to write in order to start ft errno = %d\n", errno);
		purple_xfer_cancel_remote(xfer);
		return;
	}

	if (written < remaining) {
		xd->txbuf_written += written;
		return;
	}

	purple_input_remove(xd->tx_handler);
	xd->tx_handler = 0;
	g_free(xd->txbuf);
	xd->txbuf = NULL;
	xd->txbuflen = 0;

	purple_xfer_start(xfer, source, NULL, 0);
}

static void yahoo_sendfile_connected(gpointer data, gint source, const gchar *error_message)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	struct yahoo_packet *pkt;
	gchar *size, *filename, *encoded_filename, *header;
	guchar *pkt_buf;
	const char *host;
	int port;
	size_t content_length, header_len, pkt_buf_len;
	PurpleConnection *gc;
	PurpleAccount *account;
	struct yahoo_data *yd;

	purple_debug(PURPLE_DEBUG_INFO, "yahoo",
			   "AAA - in yahoo_sendfile_connected\n");
	if (!(xfer = data))
		return;
	if (!(xd = xfer->data))
		return;

	if (source < 0) {
		purple_xfer_error(PURPLE_XFER_RECEIVE, purple_xfer_get_account(xfer),
				xfer->who, _("Unable to connect."));
		purple_xfer_cancel_remote(xfer);
		return;
	}

	xfer->fd = source;

	/* Assemble the tx buffer */
	gc = xd->gc;
	account = purple_connection_get_account(gc);
	yd = gc->proto_data;

	pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANSFER,
		YAHOO_STATUS_AVAILABLE, yd->session_id);

	size = g_strdup_printf("%" G_GSIZE_FORMAT, purple_xfer_get_size(xfer));
	filename = g_path_get_basename(purple_xfer_get_local_filename(xfer));
	encoded_filename = yahoo_string_encode(gc, filename, NULL);

	yahoo_packet_hash(pkt, "sssss", 0, purple_connection_get_display_name(gc),
	  5, xfer->who, 14, "", 27, encoded_filename, 28, size);
	g_free(size);
	g_free(encoded_filename);
	g_free(filename);

	content_length = YAHOO_PACKET_HDRLEN + yahoo_packet_length(pkt);

	pkt_buf_len = yahoo_packet_build(pkt, 8, FALSE, yd->jp, &pkt_buf);
	yahoo_packet_free(pkt);

	host = purple_account_get_string(account, "xfer_host", YAHOO_XFER_HOST);
	port = purple_account_get_int(account, "xfer_port", YAHOO_XFER_PORT);
	header = g_strdup_printf(
		"POST http://%s:%d/notifyft HTTP/1.0\r\n"
		"Content-length: %" G_GSIZE_FORMAT "\r\n"
		"Host: %s:%d\r\n"
		"Cookie: Y=%s; T=%s\r\n"
		"\r\n",
		host, port, content_length + 4 + purple_xfer_get_size(xfer),
		host, port, yd->cookie_y, yd->cookie_t);

	header_len = strlen(header);

	xd->txbuflen = header_len + pkt_buf_len + 4;
	xd->txbuf = g_malloc(xd->txbuflen);

	memcpy(xd->txbuf, header, header_len);
	g_free(header);
	memcpy(xd->txbuf + header_len, pkt_buf, pkt_buf_len);
	g_free(pkt_buf);
	memcpy(xd->txbuf + header_len + pkt_buf_len, "29\xc0\x80", 4);

	xd->txbuf_written = 0;

	if (xd->tx_handler == 0)
	{
		xd->tx_handler = purple_input_add(source, PURPLE_INPUT_WRITE,
										yahoo_sendfile_send_cb, xfer);
		yahoo_sendfile_send_cb(xfer, source, PURPLE_INPUT_WRITE);
	}
}

static void yahoo_xfer_init(PurpleXfer *xfer)
{
	struct yahoo_xfer_data *xfer_data;
	PurpleConnection *gc;
	PurpleAccount *account;
	struct yahoo_data *yd;

	xfer_data = xfer->data;
	gc = xfer_data->gc;
	yd = gc->proto_data;
	account = purple_connection_get_account(gc);

	if (purple_xfer_get_type(xfer) == PURPLE_XFER_SEND) {
		if (yd->jp) {
			if (purple_proxy_connect(NULL, account, purple_account_get_string(account, "xferjp_host",  YAHOOJP_XFER_HOST),
			                       purple_account_get_int(account, "xfer_port", YAHOO_XFER_PORT),
			                       yahoo_sendfile_connected, xfer) == NULL)
			{
				purple_notify_error(gc, NULL, _("File Transfer Failed"),
				                _("Unable to establish file descriptor."));
				purple_xfer_cancel_remote(xfer);
			}
		} else {
			if (purple_proxy_connect(NULL, account, purple_account_get_string(account, "xfer_host",  YAHOO_XFER_HOST),
			                       purple_account_get_int(account, "xfer_port", YAHOO_XFER_PORT),
			                       yahoo_sendfile_connected, xfer) == NULL)
			{
				purple_notify_error(gc, NULL, _("File Transfer Failed"),
				                _("Unable to establish file descriptor."));
				purple_xfer_cancel_remote(xfer);
			}
		}
	} else {
		xfer->fd = -1;
		if (purple_proxy_connect(NULL, account, xfer_data->host, xfer_data->port,
		                              yahoo_receivefile_connected, xfer) == NULL) {
			purple_notify_error(gc, NULL, _("File Transfer Failed"),
			             _("Unable to establish file descriptor."));
			purple_xfer_cancel_remote(xfer);
		}
	}
}

static void yahoo_xfer_init_15(PurpleXfer *xfer)
{
	struct yahoo_xfer_data *xfer_data;
	PurpleConnection *gc;
	PurpleAccount *account;
	struct yahoo_data *yd;
	struct yahoo_packet *pkt;

	xfer_data = xfer->data;
	gc = xfer_data->gc;
	yd = gc->proto_data;
	account = purple_connection_get_account(gc);

	if (purple_xfer_get_type(xfer) == PURPLE_XFER_SEND)	{
		gchar *filename;
		filename = g_path_get_basename(purple_xfer_get_local_filename(xfer));
		pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_15,
							   YAHOO_STATUS_AVAILABLE,
							   yd->session_id);
		yahoo_packet_hash(pkt, "sssiiiisiii",
			1, purple_normalize(account, purple_account_get_username(account)),
			5, xfer->who,
			265, xfer_data->xfer_peer_idstring,
			222, 1,
			266, 1,
			302, 268,
			300, 268,
			27,  filename,
			28,  xfer->size,
			301, 268,
			303, 268);
		g_free(filename); 
	} else {
		if(xfer_data->firstoflist == TRUE) {
			pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_15,
				YAHOO_STATUS_AVAILABLE, yd->session_id);
	
			yahoo_packet_hash(pkt, "sssi",
				1, purple_normalize(account, purple_account_get_username(account)),
				5, xfer->who,
				265, xfer_data->xfer_peer_idstring,
				222, 3);
		} else {
			pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_ACC_15,
				YAHOO_STATUS_AVAILABLE, yd->session_id);
	
			yahoo_packet_hash(pkt, "sssi",
				1, purple_normalize(account, purple_account_get_username(account)),
				5, xfer->who,
				265, xfer_data->xfer_peer_idstring,
				271, 1);
		}
	}
	yahoo_packet_send_and_free(pkt, yd);
}

static void yahoo_xfer_start(PurpleXfer *xfer)
{
	/* We don't need to do anything here, do we? */
}

static guint calculate_length(const gchar *l, size_t len)
{
	int i;

	for (i = 0; i < len; i++) {
		if (!g_ascii_isdigit(l[i]))
			continue;
		return strtol(l + i, NULL, 10);
	}
	return 0;
}

static gssize yahoo_xfer_read(guchar **buffer, PurpleXfer *xfer)
{
	gchar buf[4096];
	gssize len;
	gchar *start = NULL;
	gchar *length;
	gchar *end;
	int filelen;
	struct yahoo_xfer_data *xd = xfer->data;

	if (purple_xfer_get_type(xfer) != PURPLE_XFER_RECEIVE) {
		return 0;
	}

	len = read(xfer->fd, buf, sizeof(buf));

	if (len <= 0) {
		if ((purple_xfer_get_size(xfer) > 0) &&
		    (purple_xfer_get_bytes_sent(xfer) >= purple_xfer_get_size(xfer))) {
			purple_xfer_set_completed(xfer, TRUE);
			return 0;
		} else
			return -1;
	}

	if (!xd->started) {
		xd->rxqueue = g_realloc(xd->rxqueue, len + xd->rxlen);
		memcpy(xd->rxqueue + xd->rxlen, buf, len);
		xd->rxlen += len;

		length = g_strstr_len(xd->rxqueue, len, "Content-length:");
		/* some proxies re-write this header, changing the capitalization :(
		 * technically that's allowed since headers are case-insensitive
		 * [RFC 2616, section 4.2] */
		if (length == NULL)
			length = g_strstr_len(xd->rxqueue, len, "Content-Length:");
		if (length) {
			end = g_strstr_len(length, length - xd->rxqueue, "\r\n");
			if (!end)
				return 0;
			if ((filelen = calculate_length(length, len - (length - xd->rxqueue))))
				purple_xfer_set_size(xfer, filelen);
		}
		start = g_strstr_len(xd->rxqueue, len, "\r\n\r\n");
		if (start)
			start += 4;
		if (!start || start > (xd->rxqueue + len))
			return 0;
		xd->started = TRUE;

		len -= (start - xd->rxqueue);

		*buffer = g_malloc(len);
		memcpy(*buffer, start, len);
		g_free(xd->rxqueue);
		xd->rxqueue = NULL;
		xd->rxlen = 0;
	} else {
		*buffer = g_malloc(len);
		memcpy(*buffer, buf, len);
	}

	return len;
}

static gssize yahoo_xfer_write(const guchar *buffer, size_t size, PurpleXfer *xfer)
{
	gssize len;
	struct yahoo_xfer_data *xd = xfer->data;

	if (!xd)
		return -1;

	if (purple_xfer_get_type(xfer) != PURPLE_XFER_SEND) {
		return -1;
	}

	len = write(xfer->fd, buffer, size);

	if (len == -1) {
		if (purple_xfer_get_bytes_sent(xfer) >= purple_xfer_get_size(xfer))
			purple_xfer_set_completed(xfer, TRUE);
		if ((errno != EAGAIN) && (errno != EINTR))
			return -1;
		return 0;
	}

	if ((purple_xfer_get_bytes_sent(xfer) + len) >= purple_xfer_get_size(xfer))
		purple_xfer_set_completed(xfer, TRUE);

	return len;
}

static void yahoo_xfer_cancel_send(PurpleXfer *xfer)
{
	struct yahoo_xfer_data *xfer_data;

	xfer_data = xfer->data;

	if(purple_xfer_get_status(xfer) == PURPLE_XFER_STATUS_CANCEL_LOCAL && xfer_data->version == 15)
	{
		PurpleConnection *gc;
		PurpleAccount *account;
		struct yahoo_data *yd;
		struct yahoo_packet *pkt;

		gc = xfer_data->gc;
		yd = gc->proto_data;
		account = purple_connection_get_account(gc);
		if(xfer_data->xfer_idstring_for_relay) /* hack to see if file trans acc/info packet has been received */
		{
			pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_INFO_15,
								   YAHOO_STATUS_DISCONNECTED,
								   yd->session_id);
			yahoo_packet_hash(pkt, "sssi",
				1, purple_normalize(account, purple_account_get_username(account)),
				5, xfer->who,
				265, xfer_data->xfer_peer_idstring,
				66, -1);
		}
		else
		{
			pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_15,
								   YAHOO_STATUS_AVAILABLE,
								   yd->session_id);
			yahoo_packet_hash(pkt, "sssi",
				1, purple_normalize(account, purple_account_get_username(account)),
				5, xfer->who,
				265, xfer_data->xfer_peer_idstring,
				222, 2);
		}
		yahoo_packet_send_and_free(pkt, yd);
	}


	if (xfer_data)
		yahoo_xfer_data_free(xfer_data);
	xfer->data = NULL;
}

static void yahoo_xfer_cancel_recv(PurpleXfer *xfer)
{
	struct yahoo_xfer_data *xfer_data;

	xfer_data = xfer->data;

	if(purple_xfer_get_status(xfer) == PURPLE_XFER_STATUS_CANCEL_LOCAL && xfer_data->version == 15)
	{

		PurpleConnection *gc;
		PurpleAccount *account;
		struct yahoo_data *yd;
		struct yahoo_packet *pkt;

		gc = xfer_data->gc;
		yd = gc->proto_data;
		account = purple_connection_get_account(gc);
		if(!xfer_data->xfer_idstring_for_relay) /* hack to see if file trans acc/info packet has been received */
		{
			pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_15,
								   YAHOO_STATUS_AVAILABLE,
								   yd->session_id);
			yahoo_packet_hash(pkt, "sssi",
				1, purple_normalize(account, purple_account_get_username(account)),
				5, xfer->who,
				265, xfer_data->xfer_peer_idstring,
				222, 4);
		}
		else
		{
			pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_15,
								   YAHOO_STATUS_DISCONNECTED,
								   yd->session_id);
			yahoo_packet_hash(pkt, "sssi",
				1, purple_normalize(account, purple_account_get_username(account)),
				5, xfer->who,
				265, xfer_data->xfer_peer_idstring,
				66, -1);
		}
		yahoo_packet_send_and_free(pkt, yd);
	}

	if (xfer_data)
		yahoo_xfer_data_free(xfer_data);
	xfer->data = NULL;
}

static void yahoo_xfer_end(PurpleXfer *xfer_old)
{
	struct yahoo_xfer_data *xfer_data;
	PurpleXfer *xfer = NULL;
	PurpleConnection *gc;
	struct yahoo_data *yd;

	xfer_data = xfer_old->data;
	if(xfer_data && xfer_data->version == 15
	   && purple_xfer_get_type(xfer_old) == PURPLE_XFER_RECEIVE
	   && xfer_data->filename_list) {
		
		/* removing top of filename & size list completely */
		g_free( xfer_data->filename_list->data );
		g_free( xfer_data->size_list->data );
		   
		xfer_data->filename_list->data = NULL;
		xfer_data->size_list->data = NULL;
		   
		xfer_data->filename_list = g_slist_delete_link(xfer_data->filename_list, xfer_data->filename_list);
		xfer_data->size_list = g_slist_delete_link(xfer_data->size_list, xfer_data->size_list);

		/* if there are still more files */
		if(xfer_data->filename_list)
		{
			gchar* filename;
			long filesize;

			filename = xfer_data->filename_list->data;
			filesize = atol( xfer_data->size_list->data );

			gc = xfer_data->gc;
			yd = gc->proto_data;

			/* setting up xfer_data for next file's tranfer */
			g_free(xfer_data->host);
			g_free(xfer_data->path);
			g_free(xfer_data->txbuf);
			g_free(xfer_data->rxqueue);
			g_free(xfer_data->xfer_idstring_for_relay);
			if (xfer_data->tx_handler)
				purple_input_remove(xfer_data->tx_handler);
			xfer_data->host = NULL;
			xfer_data->host = NULL;
			xfer_data->port = 0;
			xfer_data->expires = 0;
			xfer_data->started = FALSE;
			xfer_data->txbuf = NULL;
			xfer_data->txbuflen = 0;
			xfer_data->txbuf_written = 0;
			xfer_data->tx_handler = 0;
			xfer_data->rxqueue = NULL;
			xfer_data->rxlen = 0;
			xfer_data->xfer_idstring_for_relay = NULL;
			xfer_data->info_val_249 = 0;
			xfer_data->status_15 = STARTED;
			xfer_data->firstoflist = FALSE;

			/* Dereference xfer_data from old xfer */
			xfer_old->data = NULL;

			/* Build the file transfer handle. */
			xfer = purple_xfer_new(gc->account, PURPLE_XFER_RECEIVE, xfer_old->who);

			
			if (xfer) {
				/* Set the info about the incoming file. */
				char *utf8_filename = yahoo_string_decode(gc, filename, TRUE);
				purple_xfer_set_filename(xfer, utf8_filename);
				g_free(utf8_filename);
				purple_xfer_set_size(xfer, filesize);
		
				xfer->data = xfer_data;
	
				/* Setup our I/O op functions */
				purple_xfer_set_init_fnc(xfer,        yahoo_xfer_init_15);
				purple_xfer_set_start_fnc(xfer,       yahoo_xfer_start);
				purple_xfer_set_end_fnc(xfer,         yahoo_xfer_end);
				purple_xfer_set_cancel_send_fnc(xfer, yahoo_xfer_cancel_send);
				purple_xfer_set_cancel_recv_fnc(xfer, yahoo_xfer_cancel_recv);
				purple_xfer_set_read_fnc(xfer,        yahoo_xfer_read);
				purple_xfer_set_write_fnc(xfer,       yahoo_xfer_write);
				purple_xfer_set_request_denied_fnc(xfer,yahoo_xfer_cancel_recv);

				/*update map to current xfer*/
				g_hash_table_remove(yd->xfer_peer_idstring_map, xfer_data->xfer_peer_idstring);
				g_hash_table_insert(yd->xfer_peer_idstring_map, xfer_data->xfer_peer_idstring, xfer);

				/* Now perform the request */
				purple_xfer_request(xfer);
			}
			return;
		}
	}
	if (xfer_data)
		yahoo_xfer_data_free(xfer_data);
	xfer_old->data = NULL;

}

void yahoo_process_p2pfilexfer(PurpleConnection *gc, struct yahoo_packet *pkt)
{
	GSList *l = pkt->hash;

	char *me      = NULL;
	char *from    = NULL;
	char *service = NULL;
	char *message = NULL;
	char *command = NULL;
	char *imv     = NULL;
	char *unknown = NULL;

	/* Get all the necessary values from this new packet */
	while(l != NULL)
	{
		struct yahoo_pair *pair = l->data;

		switch(pair->key) {
		case 5:         /* Get who the packet is for */
			me = pair->value;
			break;
		case 4:         /* Get who the packet is from */
			from = pair->value;
			break;
		case 49:        /* Get the type of service */
			service = pair->value;
			break;
		case 14:        /* Get the 'message' of the packet */
			message = pair->value;
			break;
		case 13:        /* Get the command associated with this packet */
			command = pair->value;
			break;
		case 63:        /* IMVironment name and version */
			imv = pair->value;
			break;
		case 64:        /* Not sure, but it does vary with initialization of Doodle */
			unknown = pair->value; /* So, I'll keep it (for a little while atleast) */
			break;
		}

		l = l->next;
	}

	/* If this packet is an IMVIRONMENT, handle it accordingly */
	if(service != NULL && imv != NULL && !strcmp(service, "IMVIRONMENT"))
	{
		/* Check for a Doodle packet and handle it accordingly */
		if(strstr(imv, "doodle;") != NULL)
			yahoo_doodle_process(gc, me, from, command, message, imv);

		/* If an IMVIRONMENT packet comes without a specific imviroment name */
		if(!strcmp(imv, ";0"))
		{
			/* It is unfortunately time to close all IMVironments with the remote client */
			yahoo_doodle_command_got_shutdown(gc, from);
		}
	}
}

void yahoo_process_filetransfer(PurpleConnection *gc, struct yahoo_packet *pkt)
{
	char *from = NULL;
	char *to = NULL;
	char *msg = NULL;
	char *url = NULL;
	char *imv = NULL;
	long expires = 0;
	PurpleXfer *xfer;
	struct yahoo_data *yd;
	struct yahoo_xfer_data *xfer_data;
	char *service = NULL;
	char *filename = NULL;
	unsigned long filesize = 0L;
	GSList *l;

	yd = gc->proto_data;

	for (l = pkt->hash; l; l = l->next) {
		struct yahoo_pair *pair = l->data;

		switch (pair->key) {
		case 4:
			from = pair->value;
			break;
		case 5:
			to = pair->value;
			break;
		case 14:
			msg = pair->value;
			break;
		case 20:
			url = pair->value;
			break;
		case 38:
			expires = strtol(pair->value, NULL, 10);
			break;
		case 27:
			filename = pair->value;
			break;
		case 28:
			filesize = atol(pair->value);
			break;
		case 49:
			service = pair->value;
			break;
		case 63:
			imv = pair->value;
			break;
		}
	}

	/*
	 * The remote user has changed their IMVironment.  We
	 * record it for later use.
	 */
	if (from && imv && service && (strcmp("IMVIRONMENT", service) == 0)) {
		g_hash_table_replace(yd->imvironments, g_strdup(from), g_strdup(imv));
		return;
	}

	if (pkt->service == YAHOO_SERVICE_P2PFILEXFER) {
		if (service && (strcmp("FILEXFER", service) != 0)) {
			purple_debug_misc("yahoo", "unhandled service 0x%02x\n", pkt->service);
			return;
		}
	}

	if (msg) {
		char *tmp;
		tmp = strchr(msg, '\006');
		if (tmp)
			*tmp = '\0';
	}

	if (!url || !from)
		return;

	/* Setup the Yahoo-specific file transfer data */
	xfer_data = g_new0(struct yahoo_xfer_data, 1);
	xfer_data->gc = gc;
	if (!purple_url_parse(url, &(xfer_data->host), &(xfer_data->port), &(xfer_data->path), NULL, NULL)) {
		g_free(xfer_data);
		return;
	}

	purple_debug_misc("yahoo_filexfer", "Host is %s, port is %d, path is %s, and the full url was %s.\n",
	                xfer_data->host, xfer_data->port, xfer_data->path, url);

	/* Build the file transfer handle. */
	xfer = purple_xfer_new(gc->account, PURPLE_XFER_RECEIVE, from);
	if (xfer)
	{
		xfer->data = xfer_data;

		/* Set the info about the incoming file. */
		if (filename) {
			char *utf8_filename = yahoo_string_decode(gc, filename, TRUE);
			purple_xfer_set_filename(xfer, utf8_filename);
			g_free(utf8_filename);
		} else {
			gchar *start, *end;
			start = g_strrstr(xfer_data->path, "/");
			if (start)
				start++;
			end = g_strrstr(xfer_data->path, "?");
			if (start && *start && end) {
				char *utf8_filename;
				filename = g_strndup(start, end - start);
				utf8_filename = yahoo_string_decode(gc, filename, TRUE);
				g_free(filename);
				purple_xfer_set_filename(xfer, utf8_filename);
				g_free(utf8_filename);
				filename = NULL;
			}
		}

		purple_xfer_set_size(xfer, filesize);

		/* Setup our I/O op functions */
		purple_xfer_set_init_fnc(xfer,        yahoo_xfer_init);
		purple_xfer_set_start_fnc(xfer,       yahoo_xfer_start);
		purple_xfer_set_end_fnc(xfer,         yahoo_xfer_end);
		purple_xfer_set_cancel_send_fnc(xfer, yahoo_xfer_cancel_send);
		purple_xfer_set_cancel_recv_fnc(xfer, yahoo_xfer_cancel_recv);
		purple_xfer_set_read_fnc(xfer,        yahoo_xfer_read);
		purple_xfer_set_write_fnc(xfer,       yahoo_xfer_write);

		/* Now perform the request */
		purple_xfer_request(xfer);
	}
}

PurpleXfer *yahoo_new_xfer(PurpleConnection *gc, const char *who)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xfer_data;

	g_return_val_if_fail(who != NULL, NULL);

	xfer_data = g_new0(struct yahoo_xfer_data, 1);
	xfer_data->gc = gc;

	/* Build the file transfer handle. */
	xfer = purple_xfer_new(gc->account, PURPLE_XFER_SEND, who);
	if (xfer)
	{
		xfer->data = xfer_data;

		/* Setup our I/O op functions */
		purple_xfer_set_init_fnc(xfer,        yahoo_xfer_init);
		purple_xfer_set_start_fnc(xfer,       yahoo_xfer_start);
		purple_xfer_set_end_fnc(xfer,         yahoo_xfer_end);
		purple_xfer_set_cancel_send_fnc(xfer, yahoo_xfer_cancel_send);
		purple_xfer_set_cancel_recv_fnc(xfer, yahoo_xfer_cancel_recv);
		purple_xfer_set_read_fnc(xfer,        yahoo_xfer_read);
		purple_xfer_set_write_fnc(xfer,       yahoo_xfer_write);
	}

	return xfer;
}

static gchar* yahoo_xfer_new_xfer_id(void)
{
	gchar *ans;
	int i,j;
	ans = g_strnfill(24, ' ');
	ans[23] = '$';
	ans[22] = '$';
	for(i = 0; i < 22; i++)
	{
		j = g_random_int_range (0,61);
		if(j < 26)
			ans[i] = j + 'a';
		else if(j < 52)
			ans[i] = j - 26 + 'A';
		else
			ans[i] = j - 52 + '0';
	}
	return ans;
}

static void yahoo_xfer_dns_connected_15(GSList *hosts, gpointer data, const char *error_message)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	struct sockaddr_in *addr;
	struct yahoo_packet *pkt;
	long actaddr;
	long a,b,c,d;
	PurpleConnection *gc;
	PurpleAccount *account;
	struct yahoo_data *yd;
	gchar *url;
	gchar *filename;

	if (!(xfer = data))
		return;
	if (!(xd = xfer->data))
		return;
	gc = xd->gc;
	account = purple_connection_get_account(gc);
	yd = gc->proto_data;

	if(!hosts)
	{
		purple_debug_error("yahoo", "Unable to find an IP address for relay.msg.yahoo.com\n");
		purple_xfer_cancel_remote(xfer);
		return;
	}
	
	/* Discard the length... */
	hosts = g_slist_remove(hosts, hosts->data);
	if(!hosts)
	{
		purple_debug_error("yahoo", "Unable to find an IP address for relay.msg.yahoo.com\n");
		purple_xfer_cancel_remote(xfer);
		return;
	}
	
	/*TODO:actually, u must try with addr no.1 , if its not working addr no.2 .....*/
	addr = hosts->data;
	actaddr = addr->sin_addr.s_addr;
	d = actaddr % 256;
	actaddr = (actaddr - d) / 256;
	c = actaddr % 256;
	actaddr = (actaddr - c) / 256;
	b = actaddr % 256;
	actaddr = (actaddr - b) / 256;
	a = actaddr;
	if(yd->jp)
		xd->port = YAHOOJP_XFER_RELAY_PORT;
	else
		xd->port = YAHOO_XFER_RELAY_PORT;

	url = g_strdup_printf("%ld.%ld.%ld.%ld", d, c, b, a);
	if (!purple_url_parse(url, &(xd->host), &(xd->port), &(xd->path), NULL, NULL)) {
		purple_xfer_cancel_remote(xfer);
		g_free(url);
		return;
	}
	g_free(url);
	/* Free the address... */
	g_free(hosts->data);
	hosts = g_slist_remove(hosts, hosts->data);
	addr = NULL;
	while (hosts != NULL)
	{
		/* Discard the length... */
		hosts = g_slist_remove(hosts, hosts->data);
		/* Free the address... */
		g_free(hosts->data);
		hosts = g_slist_remove(hosts, hosts->data);
	}

	pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_INFO_15, YAHOO_STATUS_AVAILABLE, yd->session_id);
	filename = g_path_get_basename(purple_xfer_get_local_filename(xfer));

	yahoo_packet_hash(pkt, "ssssis",
		1, purple_normalize(account, purple_account_get_username(account)),
		5, xfer->who,
		265, xd->xfer_peer_idstring,
		27,  filename,
		249, 3,
		250, xd->host);

	g_free(filename);
	yahoo_packet_send_and_free(pkt, yd);
}


void yahoo_send_file(PurpleConnection *gc, const char *who, const char *file)
{
	struct yahoo_xfer_data *xfer_data;
	struct yahoo_data *yd = gc->proto_data;
	int ver = 0;
	PurpleXfer *xfer = yahoo_new_xfer(gc, who);
	YahooFriend *yf = yahoo_friend_find(gc, who);

	/* To determine if we should use yahoo p15 for transfer.  Check other user's
	 * reported version, but if we're on Yahoo Japan, ignore it. */
	if(yf && yf->version_id > 500000 && !yd->jp)
		ver = 15; 

	g_return_if_fail(xfer != NULL);

	if(ver == 15) {
		xfer_data = xfer->data;
		xfer_data->status_15 = STARTED;
		purple_xfer_set_init_fnc(xfer, yahoo_xfer_init_15);
		xfer_data->version = 15;
		xfer_data->xfer_peer_idstring = yahoo_xfer_new_xfer_id();
		g_hash_table_insert(yd->xfer_peer_idstring_map, xfer_data->xfer_peer_idstring, xfer);
	}

	/* Now perform the request */
	if (file)
		purple_xfer_request_accepted(xfer, file);
	else
		purple_xfer_request(xfer);
}

static void yahoo_xfer_connected_15(gpointer data, gint source, const gchar *error_message);/*using this in recv_cb*/
static void yahoo_xfer_recv_cb_15(gpointer data, gint source, PurpleInputCondition condition)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	int did;
	gchar* buf;
	gchar* t;
	PurpleAccount *account;
	PurpleConnection *gc;

	xfer = data;
	xd = xfer->data;
	account = purple_connection_get_account(xd->gc);
	gc = xd->gc;

	buf=g_strnfill(1000, 0);
	while((did = read(source, buf, 998)) > 0)
	{
		xd->txbuflen += did;
		buf[did] = '\0';  
		t = xd->txbuf;
		xd->txbuf = g_strconcat(t,buf,NULL);
		g_free(t);
	}
	g_free(buf);

	if (did < 0 && errno == EAGAIN) return;
	else if (did < 0) {
		purple_debug_error("yahoo", "Unable to write in order to start ft errno = %d\n", errno);
		purple_xfer_cancel_remote(xfer);
		return;
	}

	purple_input_remove(xd->tx_handler);
	xd->tx_handler = 0;
	xd->txbuflen = 0;

	if(xd->status_15 == HEAD_REQUESTED) {
		xd->status_15 = HEAD_REPLY_RECEIVED;
		close(source);/*Is this required?*/
		g_free(xd->txbuf);
		xd->txbuf = NULL;
		if (purple_proxy_connect(NULL, account, xd->host, xd->port, yahoo_xfer_connected_15, xfer) == NULL)
		{
			purple_notify_error(gc, NULL, _("File Transfer Failed"),
				_("Unable to establish file descriptor."));
			purple_xfer_cancel_remote(xfer);
		}
	} else {
		purple_debug_error("yahoo","Unrecognized yahoo file transfer mode and stage (ymsg15):%d,%d\n",
						   purple_xfer_get_type(xfer),
						   xd->status_15);
		return;
	}
}

static void yahoo_xfer_send_cb_15(gpointer data, gint source, PurpleInputCondition condition)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	int remaining, written;

	xfer = data;
	xd = xfer->data;
	remaining = xd->txbuflen - xd->txbuf_written;
	written = write(source, xd->txbuf + xd->txbuf_written, remaining);

	if (written < 0 && errno == EAGAIN)
		written = 0;
	else if (written <= 0) {
		purple_debug_error("yahoo", "Unable to write in order to start ft errno = %d\n", errno);
		purple_xfer_cancel_remote(xfer);
		return;
	}

	if (written < remaining) {
		xd->txbuf_written += written;
		return;
	}

	purple_input_remove(xd->tx_handler);
	xd->tx_handler = 0;
	g_free(xd->txbuf);
	xd->txbuf = NULL;
	xd->txbuflen = 0;
	xd->txbuf_written = 0;

	if(purple_xfer_get_type(xfer) == PURPLE_XFER_RECEIVE && xd->status_15 == STARTED)
	{	
		xd->status_15 = HEAD_REQUESTED;
		xd->tx_handler = purple_input_add(source, PURPLE_INPUT_READ, yahoo_xfer_recv_cb_15, xfer);
		yahoo_xfer_recv_cb_15(xfer, source, PURPLE_INPUT_READ);
	}
	else if(purple_xfer_get_type(xfer) == PURPLE_XFER_RECEIVE && xd->status_15 == HEAD_REPLY_RECEIVED)
	{
		xd->status_15 = TRANSFER_PHASE;
		xfer->fd = source;
		purple_xfer_start(xfer, source, NULL, 0);
	}
	else if(purple_xfer_get_type(xfer) == PURPLE_XFER_SEND && xd->status_15 == ACCEPTED)
	{
		xd->status_15 = TRANSFER_PHASE;
		xfer->fd = source;
		purple_xfer_start(xfer, source, NULL, 0);
	}
	else
	{
		purple_debug_error("yahoo", "Unrecognized yahoo file transfer mode and stage (ymsg15):%d,%d\n", purple_xfer_get_type(xfer), xd->status_15);
		return;
	}

}


static void yahoo_xfer_connected_15(gpointer data, gint source, const gchar *error_message)
{
	PurpleXfer *xfer;
	struct yahoo_xfer_data *xd;
	PurpleAccount *account;
	struct yahoo_data* yd;

	if (!(xfer = data))
		return;
	if (!(xd = xfer->data))
		return;
	yd = xd->gc->proto_data;
	account = purple_connection_get_account(xd->gc);
	if ((source < 0) || (xd->path == NULL) || (xd->host == NULL)) {
		purple_xfer_error(PURPLE_XFER_RECEIVE, purple_xfer_get_account(xfer),
			xfer->who, _("Unable to connect."));
		purple_xfer_cancel_remote(xfer);
		return;
	}
	/* The first time we get here, assemble the tx buffer */
	if (xd->txbuflen == 0)
	{
		gchar* cookies;
		cookies = yahoo_get_cookies(xd->gc);
		if(purple_xfer_get_type(xfer) == PURPLE_XFER_SEND && xd->status_15 == ACCEPTED)
		{
			if(xd->info_val_249 == 2)
				{
				/*sending file via p2p, we are connected as client*/
				xd->txbuf = g_strdup_printf("POST /%s HTTP/1.1\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\nHost: %s\r\nContent-Length: %ld\r\nCache-Control: no-cache\r\n\r\n",
										xd->path,
										xd->host,
										(long int)xfer->size);	/*to do, add Referer*/
				}
			else
				{
				/*sending file via relaying*/
				xd->txbuf = g_strdup_printf("POST /relay?token=%s&sender=%s&recver=%s HTTP/1.1\r\nCookie:%s\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\nHost: %s\r\nContent-Length: %ld\r\nCache-Control: no-cache\r\n\r\n",
										purple_url_encode(xd->xfer_idstring_for_relay),
										purple_normalize(account, purple_account_get_username(account)),
										xfer->who,
										cookies,
										xd->host,
										(long int)xfer->size);
				}
		}
		else if(purple_xfer_get_type(xfer) == PURPLE_XFER_RECEIVE && xd->status_15 == STARTED)
		{	
			if(xd->info_val_249 == 1)
				{
				/*receiving file via p2p, connected as client*/
				xd->txbuf = g_strdup_printf("HEAD /%s HTTP/1.1\r\nAccept:*/*\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\nHost: %s\r\nContent-Length: 0\r\nCache-Control: no-cache\r\n\r\n",xd->path,xd->host);
			}
			else
				{
				/*receiving file via relaying*/
				xd->txbuf = g_strdup_printf("HEAD /relay?token=%s&sender=%s&recver=%s HTTP/1.1\r\nAccept:*/*\r\nCookie:%s\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\nHost:%s\r\nContent-Length: 0\r\nCache-Control: no-cache\r\n\r\n",
										purple_url_encode(xd->xfer_idstring_for_relay),
										purple_normalize(account, purple_account_get_username(account)),
										xfer->who,
										cookies,
										xd->host);
			}
		}
		else if(purple_xfer_get_type(xfer) == PURPLE_XFER_RECEIVE && xd->status_15 == HEAD_REPLY_RECEIVED)
		{
			if(xd->info_val_249 == 1)
				{
				/*receiving file via p2p, connected as client*/
				xd->txbuf = g_strdup_printf("GET /%s HTTP/1.1\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\nHost: %s\r\nConnection: Keep-Alive\r\n\r\n",xd->path,xd->host);
			}
			else
				{
				/*receiving file via relaying*/
				xd->txbuf = g_strdup_printf("GET /relay?token=%s&sender=%s&recver=%s HTTP/1.1\r\nCookie:%s\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.5)\r\nHost:%s\r\nConnection: Keep-Alive\r\n\r\n",
										purple_url_encode(xd->xfer_idstring_for_relay),
										purple_normalize(account, purple_account_get_username(account)),
										xfer->who,
										cookies,
										xd->host);
			}
		}
		else
		{
			purple_debug_error("yahoo", "Unrecognized yahoo file transfer mode and stage (ymsg15):%d,%d\n", purple_xfer_get_type(xfer), xd->status_15);
			g_free(cookies);
			return;
		}
		xd->txbuflen = strlen(xd->txbuf);
		xd->txbuf_written = 0;
		g_free(cookies);
	}

	if (!xd->tx_handler)
	{
		xd->tx_handler = purple_input_add(source, PURPLE_INPUT_WRITE,
			yahoo_xfer_send_cb_15, xfer);
		yahoo_xfer_send_cb_15(xfer, source, PURPLE_INPUT_WRITE);
	}
}

/*send (p2p) file transfer information when we are connected as client*/
static void yahoo_p2p_client_send_ft_info(PurpleConnection *gc, PurpleXfer *xfer)
{
	struct yahoo_xfer_data *xd;
	struct yahoo_packet *pkt;
	PurpleAccount *account;
	struct yahoo_data *yd;
	gchar *filename;

	if (!(xd = xfer->data))
		return;

	account = purple_connection_get_account(gc);
	yd = gc->proto_data;

	pkt = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_INFO_15, YAHOO_STATUS_AVAILABLE, yd->session_id);
	filename = g_path_get_basename(purple_xfer_get_local_filename(xfer));

	yahoo_packet_hash(pkt, "ssssi",
		1, purple_normalize(account, purple_account_get_username(account)),
		5, xfer->who,
		265, xd->xfer_peer_idstring,
		27,  filename,
		249, 2);	/*249= 2:we are connected as p2p client, and sending file*/
	xd->info_val_249 = 2;

	g_free(filename);
	yahoo_packet_send_and_free(pkt, yd);
}

void yahoo_process_filetrans_15(PurpleConnection *gc, struct yahoo_packet *pkt)
{
	char *from = NULL;
	char *to = NULL;
	char *imv = NULL;
	long val_222 = 0L;
	PurpleXfer *xfer;
	struct yahoo_data *yd;
	struct yahoo_xfer_data *xfer_data;
	char *service = NULL;
	char *filename = NULL;
	char *xfer_peer_idstring = NULL;
	unsigned long filesize = 0L;
	GSList *l;
	GSList *filename_list = NULL;
	GSList *size_list = NULL;
	int nooffiles = 0;
	
	yd = gc->proto_data;

	for (l = pkt->hash; l; l = l->next) {
		struct yahoo_pair *pair = l->data;

		switch (pair->key) {
		case 4:
			from = pair->value;
			break;
		case 5:
			to = pair->value;
			break;
		case 265:
			xfer_peer_idstring = pair->value;
			break;
		case 27:
			filename_list = g_slist_prepend(filename_list, g_strdup(pair->value));
			nooffiles++;
			break;
		case 28:
			size_list = g_slist_prepend(size_list, g_strdup(pair->value));
			break;
		case 222:
			val_222 = atol(pair->value);
			/* 1=send, 2=cancel, 3=accept, 4=reject */ 
			break;

		/*check for p2p and imviron .... not sure it comes by this service packet. Since it was bundled with filexfer in old ymsg version, still keeping it.*/
		case 49:
			service = pair->value;
			break;
		case 63:
			imv = pair->value;
			break;
		/*end check*/

		}
	}
	if(!xfer_peer_idstring)
		return;

	if(val_222 == 2 || val_222 == 4)
	{
		xfer = g_hash_table_lookup(yd->xfer_peer_idstring_map,
								   xfer_peer_idstring);
		if(!xfer) return;
		purple_xfer_cancel_remote(xfer);
		return;
	}
	if(val_222 == 3)
	{
		xfer = g_hash_table_lookup(yd->xfer_peer_idstring_map,
								   xfer_peer_idstring);
		if(!xfer)
			return;
		/*
		*	In the file trans info packet that we must reply with, we are
		*	supposed to mention the ip address...
		*	purple connect does not give me a way of finding the ip address...
		*	so, purple dnsquery is used... but retries, trying with next ip
		*	address etc. is not implemented..TODO
		*/
		
		/*p2p connection exists, we being p2p client*/
		if( g_hash_table_lookup(yd->peers, from) )	{
			/*send p2p file transfer information when we are connected as client*/
			yahoo_p2p_client_send_ft_info(gc, xfer);
			return;
		}

		if (yd->jp)
		{
			purple_dnsquery_a(YAHOOJP_XFER_RELAY_HOST, YAHOOJP_XFER_RELAY_PORT,
							yahoo_xfer_dns_connected_15, xfer);
		}
		else
		{
			purple_dnsquery_a(YAHOO_XFER_RELAY_HOST, YAHOO_XFER_RELAY_PORT,
							yahoo_xfer_dns_connected_15, xfer);
		}
		return;
	}

	/*processing for p2p and imviron .... not sure it comes by this service packet. Since it was bundled with filexfer in old ymsg version, still keeping it.*/
	/*
	* The remote user has changed their IMVironment.  We
	* record it for later use.
	*/
	if (from && imv && service && (strcmp("IMVIRONMENT", service) == 0)) {
		g_hash_table_replace(yd->imvironments, g_strdup(from), g_strdup(imv));
		return;
	}
	
	if (pkt->service == YAHOO_SERVICE_P2PFILEXFER) {
		if (service && (strcmp("FILEXFER", service) != 0)) {
			purple_debug_misc("yahoo", "unhandled service 0x%02x\n", pkt->service);
			return;
		}
	}
	/*end processing*/

	if(!filename_list)
		return;
	/* have to change list into order in which client at other end sends */
	filename_list = g_slist_reverse(filename_list);
	size_list = g_slist_reverse(size_list);
	filename = filename_list->data;
	filesize = atol(size_list->data);

	if(!from) return;
	xfer_data = g_new0(struct yahoo_xfer_data, 1);
	xfer_data->version = 15;
	xfer_data->firstoflist = TRUE;
	xfer_data->gc = gc;
	xfer_data->xfer_peer_idstring = g_strdup(xfer_peer_idstring);
	xfer_data->filename_list = filename_list;
	xfer_data->size_list = size_list;
	
	/* Build the file transfer handle. */
	xfer = purple_xfer_new(gc->account, PURPLE_XFER_RECEIVE, from);
	xfer->message = NULL;

	if (xfer)
	{
		/* Set the info about the incoming file. */
		char *utf8_filename = yahoo_string_decode(gc, filename, TRUE);
		purple_xfer_set_filename(xfer, utf8_filename);
		g_free(utf8_filename);
		purple_xfer_set_size(xfer, filesize);

		xfer->data = xfer_data;


		/* Setup our I/O op functions */
		purple_xfer_set_init_fnc(xfer,        yahoo_xfer_init_15);
		purple_xfer_set_start_fnc(xfer,       yahoo_xfer_start);
		purple_xfer_set_end_fnc(xfer,         yahoo_xfer_end);
		purple_xfer_set_cancel_send_fnc(xfer, yahoo_xfer_cancel_send);
		purple_xfer_set_cancel_recv_fnc(xfer, yahoo_xfer_cancel_recv);
		purple_xfer_set_read_fnc(xfer,        yahoo_xfer_read);
		purple_xfer_set_write_fnc(xfer,       yahoo_xfer_write);
		purple_xfer_set_request_denied_fnc(xfer,yahoo_xfer_cancel_recv);

		g_hash_table_insert(yd->xfer_peer_idstring_map,
							xfer_data->xfer_peer_idstring,
							xfer);
		
		if(nooffiles > 1) {
			gchar* message;
			message = g_strdup_printf(_("%s is trying to send you a group of %d files.\n"), xfer->who, nooffiles);
			purple_xfer_conversation_write(xfer, message, FALSE);
			g_free(message);
		}
		/* Now perform the request */
		purple_xfer_request(xfer);
	}
}

void yahoo_process_filetrans_info_15(PurpleConnection *gc, struct yahoo_packet *pkt)
{
	char *from = NULL;
	char *to = NULL;
	char *url = NULL;
	long val_249 = 0;
	long val_66 = 0;
	PurpleXfer *xfer;
	struct yahoo_data *yd;
	struct yahoo_xfer_data *xfer_data;
	char *filename = NULL;
	char *xfer_peer_idstring = NULL;
	char *xfer_idstring_for_relay = NULL;
	GSList *l;
	struct yahoo_packet *pkt_to_send;
	PurpleAccount *account;

	yd = gc->proto_data;

	for (l = pkt->hash; l; l = l->next) {
		struct yahoo_pair *pair = l->data;

		switch (pair->key) {
		case 4:
			from = pair->value;
			break;
		case 5:
			to = pair->value;
			break;
		case 265:
			xfer_peer_idstring = pair->value;
			break;
		case 27:
			filename = pair->value;
			break;
		case 66:
			val_66 = strtol(pair->value, NULL, 10);
			break;
		case 249:
			val_249 = strtol(pair->value, NULL, 10);
			/* 249 has value 1 or 2 when doing p2p transfer and value 3 when relaying through yahoo server */
			break;
		case 250:
			url = pair->value;
			break;
		case 251:
			xfer_idstring_for_relay = pair->value;
			break;
		}
	}

	if(!xfer_peer_idstring)
		return;

	xfer = g_hash_table_lookup(yd->xfer_peer_idstring_map, xfer_peer_idstring);

	if(!xfer) return;

	if(val_66==-1)
	{
		purple_xfer_cancel_remote(xfer);
		return;
	}

	xfer_data = xfer->data;

	xfer_data->info_val_249 = val_249;
	xfer_data->xfer_idstring_for_relay = g_strdup(xfer_idstring_for_relay);
	if (!purple_url_parse(url, &(xfer_data->host), &(xfer_data->port), &(xfer_data->path), NULL, NULL)) {
		purple_xfer_cancel_remote(xfer);
		return;
	}

	account = purple_connection_get_account(xfer_data->gc);

	pkt_to_send = yahoo_packet_new(YAHOO_SERVICE_FILETRANS_ACC_15,
		YAHOO_STATUS_AVAILABLE, yd->session_id);

	yahoo_packet_hash(pkt_to_send, "ssssisi",
		1, purple_normalize(account, purple_account_get_username(account)),
		5, xfer->who,
		265, xfer_data->xfer_peer_idstring,
		27, xfer->filename,
		249, xfer_data->info_val_249,
		251, xfer_data->xfer_idstring_for_relay,
		222, 3);

	yahoo_packet_send_and_free(pkt_to_send, yd);
	if (purple_proxy_connect(NULL, account, xfer_data->host, xfer_data->port,
		yahoo_xfer_connected_15, xfer) == NULL) {
		purple_notify_error(gc, NULL, _("File Transfer Failed"),
			_("Unable to establish file descriptor."));
		purple_xfer_cancel_remote(xfer);
		}

}
/*TODO: Check filename etc. No probs till some hacker comes in the way*/
void yahoo_process_filetrans_acc_15(PurpleConnection *gc, struct yahoo_packet *pkt)
{
	gchar *xfer_peer_idstring = NULL;
	gchar *xfer_idstring_for_relay = NULL;
	PurpleXfer *xfer;
	struct yahoo_data *yd;
	struct yahoo_xfer_data *xfer_data;
	GSList *l;
	PurpleAccount *account;
	long val_66 = 0;
	gchar *url = NULL;
	int val_249;

	yd = gc->proto_data;
	for (l = pkt->hash; l; l = l->next) {
		struct yahoo_pair *pair = l->data;

		switch (pair->key) {
		case 251:
			xfer_idstring_for_relay = pair->value;
			break;
		case 265:
			xfer_peer_idstring = pair->value;
			break;
		case 66:
			val_66 = atol(pair->value);
			break;
		case 249:
			val_249 = atol(pair->value);
			break;
		case 250:
			url = pair->value;	/*we get a p2p url here when sending file, connected as client*/
			break;
		}
	}

	xfer = g_hash_table_lookup(yd->xfer_peer_idstring_map, xfer_peer_idstring);
	if(!xfer) return;

	if(val_66 == -1 || ( (!(xfer_idstring_for_relay)) && (val_249 != 2) ))
	{
		purple_xfer_cancel_remote(xfer);
		return;
	}

	if( (val_249 == 2) && (!(url)) )
	{
		purple_xfer_cancel_remote(xfer);
		return;
	}

	xfer_data = xfer->data;
	if(url)
		purple_url_parse(url, &(xfer_data->host), &(xfer_data->port), &(xfer_data->path), NULL, NULL);
		
	xfer_data->xfer_idstring_for_relay = g_strdup(xfer_idstring_for_relay);
	xfer_data->status_15 = ACCEPTED;
	account = purple_connection_get_account(gc);

	if (purple_proxy_connect(NULL, account, xfer_data->host, xfer_data->port,
		yahoo_xfer_connected_15, xfer) == NULL)
	{
		purple_notify_error(gc, NULL, _("File Transfer Failed"),_("Unable to connect"));
			purple_xfer_cancel_remote(xfer);
	}
}