libpurple/protocols/bonjour/jabber.c

/*
 * purple - Bonjour Protocol Plugin
 *
 * 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"

#ifndef _WIN32
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#else
#include "libc_interface.h"
#endif
#include <sys/types.h>

/* Solaris */
#if defined (__SVR4) && defined (__sun)
#include <sys/sockio.h>
#endif

#include <glib.h>
#include <unistd.h>
#include <fcntl.h>

#include "network.h"
#include "eventloop.h"
#include "connection.h"
#include "blist.h"
#include "xmlnode.h"
#include "debug.h"
#include "notify.h"
#include "util.h"

#include "jabber.h"
#include "parser.h"
#include "bonjour.h"
#include "buddy.h"
#include "bonjour_ft.h"

#ifdef _SIZEOF_ADDR_IFREQ
#  define HX_SIZE_OF_IFREQ(a) _SIZEOF_ADDR_IFREQ(a)
#else
#  define HX_SIZE_OF_IFREQ(a) sizeof(a)
#endif

#define STREAM_END "</stream:stream>"
/* TODO: specify version='1.0' and send stream features */
#define DOCTYPE "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n" \
		"<stream:stream xmlns=\"jabber:client\" xmlns:stream=\"http://etherx.jabber.org/streams\" from=\"%s\" to=\"%s\">"

enum sent_stream_start_types {
	NOT_SENT       = 0,
	PARTIALLY_SENT = 1,
	FULLY_SENT     = 2
};

static void
xep_iq_parse(xmlnode *packet, PurpleConnection *connection, PurpleBuddy *pb);

static BonjourJabberConversation *
bonjour_jabber_conv_new(PurpleBuddy *pb) {

	BonjourJabberConversation *bconv = g_new0(BonjourJabberConversation, 1);
	bconv->socket = -1;
	bconv->tx_buf = purple_circ_buffer_new(512);
	bconv->tx_handler = 0;
	bconv->rx_handler = 0;
	bconv->pb = pb;

	bonjour_parser_setup(bconv);

	return bconv;
}


static const char *
_font_size_ichat_to_purple(int size)
{
	if (size > 24) {
		return "7";
	} else if (size >= 21) {
		return "6";
	} else if (size >= 17) {
		return "5";
	} else if (size >= 14) {
		return "4";
	} else if (size >= 12) {
		return "3";
	} else if (size >= 10) {
		return "2";
	}

	return "1";
}

static void
_jabber_parse_and_write_message_to_ui(xmlnode *message_node, PurpleBuddy *pb)
{
	xmlnode *body_node, *html_node, *events_node;
	PurpleConnection *gc = pb->account->gc;
	gchar *body = NULL;
	gboolean composing_event = FALSE;

	body_node = xmlnode_get_child(message_node, "body");
	html_node = xmlnode_get_child(message_node, "html");

	if (body_node == NULL && html_node == NULL) {
		purple_debug_error("bonjour", "No body or html node found, discarding message.\n");
		return;
	}

	events_node = xmlnode_get_child_with_namespace(message_node, "x", "jabber:x:event");
	if (events_node != NULL) {
		if (xmlnode_get_child(events_node, "composing") != NULL)
			composing_event = TRUE;
		if (xmlnode_get_child(events_node, "id") != NULL) {
			/* The user is just typing */
			/* TODO: Deal with typing notification */
			return;
		}
	}

	if (html_node != NULL) {
		xmlnode *html_body_node;

		html_body_node = xmlnode_get_child(html_node, "body");
		if (html_body_node != NULL) {
			xmlnode *html_body_font_node;
			const char *ichat_balloon_color = NULL;
			const char *ichat_text_color = NULL;
			const char *font_face = NULL;
			const char *font_size = NULL;
			const char *font_color = NULL;

			ichat_balloon_color = xmlnode_get_attrib(html_body_node, "ichatballooncolor");
			ichat_text_color = xmlnode_get_attrib(html_body_node, "ichattextcolor");
			html_body_font_node = xmlnode_get_child(html_body_node, "font");

			/* Types of messages sent by iChat */
			if (html_body_font_node != NULL) {
				gchar *html_body;

				font_face = xmlnode_get_attrib(html_body_font_node, "face");
				/* The absolute iChat font sizes should be converted to 1..7 range */
				font_size = xmlnode_get_attrib(html_body_font_node, "ABSZ");
				if (font_size != NULL)
					font_size = _font_size_ichat_to_purple(atoi(font_size));
				font_color = xmlnode_get_attrib(html_body_font_node, "color");
				html_body = xmlnode_get_data(html_body_font_node);

				if (html_body == NULL)
					/* This is the kind of formated messages that Purple creates */
					html_body = xmlnode_to_str(html_body_font_node, NULL);

				if (html_body != NULL) {
					/* Use some sane defaults */
					if (font_face == NULL) font_face = "Helvetica";
					if (font_size == NULL) font_size = "3";
					if (ichat_text_color == NULL) ichat_text_color = "#000000";
					if (ichat_balloon_color == NULL) ichat_balloon_color = "#FFFFFF";

					body = g_strdup_printf("<font face='%s' size='%s' color='%s' back='%s'>%s</font>",
								   font_face, font_size, ichat_text_color, ichat_balloon_color,
								   html_body);

					g_free(html_body);
				}
			}
		}
	}

	/* Compose the message */
	if (body == NULL && body_node != NULL)
		body = xmlnode_get_data(body_node);

	if (body == NULL) {
		purple_debug_error("bonjour", "No html body or regular body found.\n");
		return;
	}

	/* Send the message to the UI */
	serv_got_im(gc, pb->name, body, 0, time(NULL));

	g_free(body);
}

struct _check_buddy_by_address_t {
	const char *address;
	PurpleBuddy **pb;
	BonjourJabber *bj;
};

static void
_check_buddy_by_address(gpointer key, gpointer value, gpointer data)
{
	PurpleBuddy *pb = value;
	BonjourBuddy *bb;
	struct _check_buddy_by_address_t *cbba = data;

	/*
	 * If the current PurpleBuddy's data is not null and the PurpleBuddy's account
	 * is the same as the account requesting the check then continue to determine
	 * whether one of the buddies IPs matches the target IP.
	 */
	if (cbba->bj->account == pb->account)
	{
		bb = pb->proto_data;
		if (bb != NULL) {
			const char *ip;
			GSList *tmp = bb->ips;

			while(tmp) {
				ip = tmp->data;
				if (ip != NULL && g_ascii_strcasecmp(ip, cbba->address) == 0) {
					*(cbba->pb) = pb;
					break;
				}
				tmp = tmp->next;
			}
		}
	}
}

static void
_send_data_write_cb(gpointer data, gint source, PurpleInputCondition cond)
{
	PurpleBuddy *pb = data;
	BonjourBuddy *bb = pb->proto_data;
	BonjourJabberConversation *bconv = bb->conversation;
	int ret, writelen;

	/* TODO: Make sure that the stream has been established before sending */

	writelen = purple_circ_buffer_get_max_read(bconv->tx_buf);

	if (writelen == 0) {
		purple_input_remove(bconv->tx_handler);
		bconv->tx_handler = 0;
		return;
	}

	ret = send(bconv->socket, bconv->tx_buf->outptr, writelen, 0);

	if (ret < 0 && errno == EAGAIN)
		return;
	else if (ret <= 0) {
		PurpleConversation *conv;
		const char *error = g_strerror(errno);

		purple_debug_error("bonjour", "Error sending message to buddy %s error: %s\n",
				   purple_buddy_get_name(pb), error ? error : "(null)");

		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, bb->name, pb->account);
		if (conv != NULL)
			purple_conversation_write(conv, NULL,
				  _("Unable to send message."),
				  PURPLE_MESSAGE_SYSTEM, time(NULL));

		bonjour_jabber_close_conversation(bb->conversation);
		bb->conversation = NULL;
		return;
	}

	purple_circ_buffer_mark_read(bconv->tx_buf, ret);
}

static gint
_send_data(PurpleBuddy *pb, char *message)
{
	gint ret;
	int len = strlen(message);
	BonjourBuddy *bb = pb->proto_data;
	BonjourJabberConversation *bconv = bb->conversation;

	/* If we're not ready to actually send, append it to the buffer */
	if (bconv->tx_handler != 0
			|| bconv->connect_data != NULL
			|| bconv->sent_stream_start != FULLY_SENT
			|| !bconv->recv_stream_start
			|| purple_circ_buffer_get_max_read(bconv->tx_buf) > 0) {
		ret = -1;
		errno = EAGAIN;
	} else {
		ret = send(bconv->socket, message, len, 0);
	}

	if (ret == -1 && errno == EAGAIN)
		ret = 0;
	else if (ret <= 0) {
		PurpleConversation *conv;
		const char *error = g_strerror(errno);

		purple_debug_error("bonjour", "Error sending message to buddy %s error: %s\n",
				   purple_buddy_get_name(pb), error ? error : "(null)");

		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, bb->name, pb->account);
		if (conv != NULL)
			purple_conversation_write(conv, NULL,
				  _("Unable to send message."),
				  PURPLE_MESSAGE_SYSTEM, time(NULL));

		bonjour_jabber_close_conversation(bb->conversation);
		bb->conversation = NULL;
		return -1;
	}

	if (ret < len) {
		/* Don't interfere with the stream starting */
		if (bconv->sent_stream_start == FULLY_SENT && bconv->recv_stream_start && bconv->tx_handler == 0)
			bconv->tx_handler = purple_input_add(bconv->socket, PURPLE_INPUT_WRITE,
				_send_data_write_cb, pb);
		purple_circ_buffer_append(bconv->tx_buf, message + ret, len - ret);
	}

	return ret;
}

void bonjour_jabber_process_packet(PurpleBuddy *pb, xmlnode *packet) {

	g_return_if_fail(packet != NULL);

	if (!strcmp(packet->name, "message"))
		_jabber_parse_and_write_message_to_ui(packet, pb);
	else if(!strcmp(packet->name, "iq"))
		xep_iq_parse(packet, NULL, pb);
	else
		purple_debug_warning("bonjour", "Unknown packet: %s\n", packet->name ? packet->name : "(null)");
}


static void
_client_socket_handler(gpointer data, gint socket, PurpleInputCondition condition)
{
	PurpleBuddy *pb = data;
	gint len, message_length;
	static char message[4096];

	/*TODO: use a static buffer */

	/* Read the data from the socket */
	if ((len = recv(socket, message, sizeof(message) - 1, 0)) == -1) {
		/* There have been an error reading from the socket */
		if (errno != EAGAIN) {
			BonjourBuddy *bb = pb->proto_data;
			const char *err = g_strerror(errno);

			purple_debug_warning("bonjour", "receive error: %s\n", err ? err : "(null)");

			bonjour_jabber_close_conversation(bb->conversation);
			bb->conversation = NULL;

			/* I guess we really don't need to notify the user.
			 * If they try to send another message it'll reconnect */
		}
		return;
	} else if (len == 0) { /* The other end has closed the socket */
		purple_debug_warning("bonjour", "Connection closed (without stream end) by %s.\n", pb->name ? pb->name : "(null)");
		bonjour_jabber_stream_ended(pb);
		return;
	} else {
		message_length = len;
		message[message_length] = '\0';

		while (message_length > 0 && g_ascii_iscntrl(message[message_length - 1])) {
			message[message_length - 1] = '\0';
			message_length--;
		}
	}

	purple_debug_info("bonjour", "Receive: -%s- %d bytes\n", message, len);

	bonjour_parser_process(pb, message, message_length);
}

void bonjour_jabber_stream_ended(PurpleBuddy *pb) {
	BonjourBuddy *bb = pb->proto_data;

	purple_debug_info("bonjour", "Recieved conversation close notification from %s.\n", pb->name);

	g_return_if_fail(bb != NULL);

	/* Inform the user that the conversation has been closed */
	if (bb->conversation != NULL) {
#if 0
		PurpleConversation *conv;
		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, pb->name, pb->account);
		if (conv != NULL) {
			char *tmp = g_strdup_printf(_("%s has closed the conversation."), pb->name);
			purple_conversation_write(conv, NULL, tmp, PURPLE_MESSAGE_SYSTEM, time(NULL));
			g_free(tmp);
		}
#endif
		/* Close the socket, clear the watcher and free memory */
		bonjour_jabber_close_conversation(bb->conversation);
		bb->conversation = NULL;
	}
}


struct _stream_start_data {
	char *msg;
};


static void
_start_stream(gpointer data, gint source, PurpleInputCondition condition)
{
	PurpleBuddy *pb = data;
	BonjourBuddy *bb = pb->proto_data;
	BonjourJabberConversation *bconv = bb->conversation;
	struct _stream_start_data *ss = bconv->stream_data;
	int len, ret;

	len = strlen(ss->msg);

	/* Start Stream */
	ret = send(source, ss->msg, len, 0);

	if (ret == -1 && errno == EAGAIN)
		return;
	else if (ret <= 0) {
		const char *err = g_strerror(errno);
		PurpleConversation *conv;
		const char *ip = NULL;

		/* For better or worse, use the first IP*/
		if (bb->ips)
			ip = bb->ips->data;

		purple_debug_error("bonjour", "Error starting stream with buddy %s at %s:%d error: %s\n",
				   purple_buddy_get_name(pb), ip ? ip : "(null)", bb->port_p2pj, err ? err : "(null)");

		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, bb->name, pb->account);
		if (conv != NULL)
			purple_conversation_write(conv, NULL,
				  _("Unable to send the message, the conversation couldn't be started."),
				  PURPLE_MESSAGE_SYSTEM, time(NULL));

		bonjour_jabber_close_conversation(bconv);
		bb->conversation = NULL;

		return;
	}

	/* This is EXTREMELY unlikely to happen */
	if (ret < len) {
		char *tmp = g_strdup(ss->msg + ret);
		g_free(ss->msg);
		ss->msg = tmp;
		return;
	}

	g_free(ss->msg);
	g_free(ss);
	bconv->stream_data = NULL;

	/* Stream started; process the send buffer if there is one */
	purple_input_remove(bconv->tx_handler);
	bconv->tx_handler = 0;
	bconv->sent_stream_start = FULLY_SENT;

	bonjour_jabber_stream_started(pb);
}

static gboolean bonjour_jabber_send_stream_init(PurpleBuddy *pb, int client_socket)
{
	int ret, len;
	char *stream_start;
	BonjourBuddy *bb = pb->proto_data;

	stream_start = g_strdup_printf(DOCTYPE, purple_account_get_username(pb->account),
								   purple_buddy_get_name(pb));
	len = strlen(stream_start);

	bb->conversation->sent_stream_start = PARTIALLY_SENT;

	/* Start the stream */
	ret = send(client_socket, stream_start, len, 0);

	if (ret == -1 && errno == EAGAIN)
		ret = 0;
	else if (ret <= 0) {
		const char *err = g_strerror(errno);
		const char *ip = NULL;

		/* For better or worse, use the first IP*/
		if (bb->ips)
			ip = bb->ips->data;

		purple_debug_error("bonjour", "Error starting stream with buddy %s at %s:%d error: %s\n",
				   purple_buddy_get_name(pb), ip ? ip : "(null)", bb->port_p2pj, err ? err : "(null)");

		close(client_socket);
		g_free(stream_start);

		return FALSE;
	}

	/* This is unlikely to happen */
	if (ret < len) {
		struct _stream_start_data *ss = g_new(struct _stream_start_data, 1);
		ss->msg = g_strdup(stream_start + ret);
		bb->conversation->stream_data = ss;
		/* Finish sending the stream start */
		bb->conversation->tx_handler = purple_input_add(client_socket,
			PURPLE_INPUT_WRITE, _start_stream, pb);
	} else
		bb->conversation->sent_stream_start = FULLY_SENT;

	g_free(stream_start);

	return TRUE;
}

static gboolean
_async_bonjour_jabber_close_conversation(gpointer data) {
	BonjourJabberConversation *bconv = data;
	bonjour_jabber_close_conversation(bconv);
	return FALSE;
}

void bonjour_jabber_stream_started(PurpleBuddy *pb) {
	BonjourBuddy *bb = pb->proto_data;
	BonjourJabberConversation *bconv = bb->conversation;

	if (bconv->sent_stream_start == NOT_SENT && !bonjour_jabber_send_stream_init(pb, bconv->socket)) {
		const char *err = g_strerror(errno);
		PurpleConversation *conv;
		const char *ip = NULL;

		/* For better or worse, use the first IP*/
		if (bb->ips)
			ip = bb->ips->data;

		purple_debug_error("bonjour", "Error starting stream with buddy %s at %s:%d error: %s\n",
				   purple_buddy_get_name(pb), ip ? ip : "(null)", bb->port_p2pj, err ? err : "(null)");

		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, bb->name, pb->account);
		if (conv != NULL)
			purple_conversation_write(conv, NULL,
				  _("Unable to send the message, the conversation couldn't be started."),
				  PURPLE_MESSAGE_SYSTEM, time(NULL));

		close(bconv->socket);
		/* This must be asynchronous because it destroys the parser and we
		 * may be in the middle of parsing.
		 */
		purple_timeout_add(0, _async_bonjour_jabber_close_conversation, bb->conversation);
		bb->conversation = NULL;
		return;
	}

	/* If the stream has been completely started, we can start doing stuff */
	if (bconv->sent_stream_start == FULLY_SENT && bconv->recv_stream_start && purple_circ_buffer_get_max_read(bconv->tx_buf) > 0) {
		/* Watch for when we can write the buffered messages */
		bconv->tx_handler = purple_input_add(bconv->socket, PURPLE_INPUT_WRITE,
			_send_data_write_cb, pb);
		/* We can probably write the data right now. */
		_send_data_write_cb(pb, bconv->socket, PURPLE_INPUT_WRITE);
	}

}

static void
_server_socket_handler(gpointer data, int server_socket, PurpleInputCondition condition)
{
	PurpleBuddy *pb = NULL;
	struct sockaddr_in their_addr; /* connector's address information */
	socklen_t sin_size = sizeof(struct sockaddr);
	int client_socket;
	int flags;
	BonjourBuddy *bb;
	char *address_text = NULL;
	PurpleBuddyList *bl = purple_get_blist();
	struct _check_buddy_by_address_t *cbba;

	/* Check that it is a read condition */
	if (condition != PURPLE_INPUT_READ)
		return;

	if ((client_socket = accept(server_socket, (struct sockaddr *)&their_addr, &sin_size)) == -1)
		return;

	flags = fcntl(client_socket, F_GETFL);
	fcntl(client_socket, F_SETFL, flags | O_NONBLOCK);

	/* Look for the buddy that has opened the conversation and fill information */
	address_text = inet_ntoa(their_addr.sin_addr);
	purple_debug_info("bonjour", "Received incoming connection from %s.\n", address_text);
	cbba = g_new0(struct _check_buddy_by_address_t, 1);
	cbba->address = address_text;
	cbba->pb = &pb;
	cbba->bj = data;
	g_hash_table_foreach(bl->buddies, _check_buddy_by_address, cbba);
	g_free(cbba);
	if (pb == NULL)
	{
		purple_debug_info("bonjour", "We don't like invisible buddies, this is not a superheros comic\n");
		close(client_socket);
		return;
	}
	bb = pb->proto_data;

	/* Check if the conversation has been previously started */
	/* This really shouldn't ever happen unless something weird is going on */
	if (bb->conversation == NULL)
	{
		bb->conversation = bonjour_jabber_conv_new(pb);

		/* We wait for the stream start before doing anything else */
		bb->conversation->socket = client_socket;
		bb->conversation->rx_handler = purple_input_add(client_socket,
			PURPLE_INPUT_READ, _client_socket_handler, pb);

	} else {
		purple_debug_warning("bonjour", "Ignoring incoming connection because an existing connection exists.\n");
		close(client_socket);
	}
}

gint
bonjour_jabber_start(BonjourJabber *data)
{
	struct sockaddr_in my_addr;
	int yes = 1;
	int i;
	gboolean bind_successful;

	/* Open a listening socket for incoming conversations */
	if ((data->socket = socket(PF_INET, SOCK_STREAM, 0)) < 0)
	{
		purple_debug_error("bonjour", "Cannot open socket: %s\n", g_strerror(errno));
		purple_connection_error_reason (data->account->gc,
			PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
			_("Cannot open socket"));
		return -1;
	}

	/* Make the socket reusable */
	if (setsockopt(data->socket, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) != 0)
	{
		purple_debug_error("bonjour", "Error setting socket options: %s\n", g_strerror(errno));
		purple_connection_error_reason (data->account->gc,
			PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
			_("Error setting socket options"));
		return -1;
	}

	memset(&my_addr, 0, sizeof(struct sockaddr_in));
	my_addr.sin_family = AF_INET;

	/* Attempt to find a free port */
	bind_successful = FALSE;
	for (i = 0; i < 10; i++)
	{
		my_addr.sin_port = htons(data->port);
		if (bind(data->socket, (struct sockaddr*)&my_addr, sizeof(struct sockaddr)) == 0)
		{
			bind_successful = TRUE;
			break;
		}
		data->port++;
	}

	/* On no!  We tried 10 ports and could not bind to ANY of them */
	if (!bind_successful)
	{
		purple_debug_error("bonjour", "Cannot bind socket: %s\n", g_strerror(errno));
		purple_connection_error_reason (data->account->gc,
			PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
			_("Could not bind socket to port"));
		return -1;
	}

	/* Attempt to listen on the bound socket */
	if (listen(data->socket, 10) != 0)
	{
		purple_debug_error("bonjour", "Cannot listen on socket: %s\n", g_strerror(errno));
		purple_connection_error_reason (data->account->gc,
			PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
			_("Could not listen on socket"));
		return -1;
	}

#if 0
	/* TODO: Why isn't this being used? */
	data->socket = purple_network_listen(data->port, SOCK_STREAM);

	if (data->socket == -1)
	{
		purple_debug_error("bonjour", "No se ha podido crear el socket\n");
	}
#endif

	/* Open a watcher in the socket we have just opened */
	data->watcher_id = purple_input_add(data->socket, PURPLE_INPUT_READ, _server_socket_handler, data);

	return data->port;
}

static void
_connected_to_buddy(gpointer data, gint source, const gchar *error)
{
	PurpleBuddy *pb = data;
	BonjourBuddy *bb = pb->proto_data;

	bb->conversation->connect_data = NULL;

	if (source < 0) {
		PurpleConversation *conv;
		const char *ip = NULL;

		/* For better or worse, use the first IP*/
		if (bb->ips)
			ip = bb->ips->data;

		purple_debug_error("bonjour", "Error connecting to buddy %s at %s:%d error: %s\n",
				   purple_buddy_get_name(pb), ip ? ip : "(null)", bb->port_p2pj, error ? error : "(null)");

		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, bb->name, pb->account);
		if (conv != NULL)
			purple_conversation_write(conv, NULL,
				  _("Unable to send the message, the conversation couldn't be started."),
				  PURPLE_MESSAGE_SYSTEM, time(NULL));

		bonjour_jabber_close_conversation(bb->conversation);
		bb->conversation = NULL;
		return;
	}

	if (!bonjour_jabber_send_stream_init(pb, source)) {
		const char *err = g_strerror(errno);
		PurpleConversation *conv;
		const char *ip = NULL;

		/* For better or worse, use the first IP*/
		if (bb->ips)
			ip = bb->ips->data;

		purple_debug_error("bonjour", "Error starting stream with buddy %s at %s:%d error: %s\n",
				   purple_buddy_get_name(pb), ip ? ip : "(null)", bb->port_p2pj, err ? err : "(null)");

		conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM, bb->name, pb->account);
		if (conv != NULL)
			purple_conversation_write(conv, NULL,
				  _("Unable to send the message, the conversation couldn't be started."),
				  PURPLE_MESSAGE_SYSTEM, time(NULL));

		close(source);
		bonjour_jabber_close_conversation(bb->conversation);
		bb->conversation = NULL;
		return;
	}

	/* Start listening for the stream acknowledgement */
	bb->conversation->socket = source;
	bb->conversation->rx_handler = purple_input_add(source,
		PURPLE_INPUT_READ, _client_socket_handler, pb);
}

static PurpleBuddy *
_find_or_start_conversation(BonjourJabber *data, const gchar *to)
{
	PurpleBuddy *pb = NULL;
	BonjourBuddy *bb = NULL;

	g_return_val_if_fail(data != NULL, NULL);
	g_return_val_if_fail(to != NULL, NULL);

	pb = purple_find_buddy(data->account, to);
	if (pb == NULL || pb->proto_data == NULL)
		/* You can not send a message to an offline buddy */
		return NULL;

	bb = (BonjourBuddy *) pb->proto_data;

	/* Check if there is a previously open conversation */
	if (bb->conversation == NULL)
	{
		PurpleProxyConnectData *connect_data;
		PurpleProxyInfo *proxy_info;
		const char *ip = NULL;

		/* For better or worse, use the first IP*/
		if (bb->ips)
			ip = bb->ips->data;

		purple_debug_info("bonjour", "Starting conversation with %s\n", to);

		/* Make sure that the account always has a proxy of "none".
		 * This is kind of dirty, but proxy_connect_none() isn't exposed. */
		proxy_info = purple_account_get_proxy_info(data->account);
		if (proxy_info == NULL) {
			proxy_info = purple_proxy_info_new();
			purple_account_set_proxy_info(data->account, proxy_info);
		}
		purple_proxy_info_set_type(proxy_info, PURPLE_PROXY_NONE);

		connect_data = purple_proxy_connect(NULL, data->account,
						    ip, bb->port_p2pj, _connected_to_buddy, pb);

		if (connect_data == NULL) {
			purple_debug_error("bonjour", "Unable to connect to buddy (%s).\n", to);
			return NULL;
		}

		bb->conversation = bonjour_jabber_conv_new(pb);
		bb->conversation->connect_data = connect_data;
		/* We don't want _send_data() to register the tx_handler;
		 * that neeeds to wait until we're actually connected. */
		bb->conversation->tx_handler = 0;
	}
	return pb;
}

int
bonjour_jabber_send_message(BonjourJabber *data, const gchar *to, const gchar *body)
{
	xmlnode *message_node, *node, *node2;
	gchar *message;
	PurpleBuddy *pb;
	BonjourBuddy *bb;
	int ret;

	pb = _find_or_start_conversation(data, to);
	if (pb == NULL) {
		purple_debug_info("bonjour", "Can't send a message to an offline buddy (%s).\n", to);
		/* You can not send a message to an offline buddy */
		return -10000;
	}

	bb = pb->proto_data;

	message_node = xmlnode_new("message");
	xmlnode_set_attrib(message_node, "to", bb->name);
	xmlnode_set_attrib(message_node, "from", purple_account_get_username(data->account));
	xmlnode_set_attrib(message_node, "type", "chat");

	/* Enclose the message from the UI within a "font" node */
	node = xmlnode_new_child(message_node, "body");
	message = purple_markup_strip_html(body);
	xmlnode_insert_data(node, message, strlen(message));
	g_free(message);

	node = xmlnode_new_child(message_node, "html");
	xmlnode_set_namespace(node, "http://www.w3.org/1999/xhtml");

	node = xmlnode_new_child(node, "body");
	message = g_strdup_printf("<font>%s</font>", body);
	node2 = xmlnode_from_str(message, strlen(message));
	g_free(message);
	xmlnode_insert_child(node, node2);

	node = xmlnode_new_child(message_node, "x");
	xmlnode_set_namespace(node, "jabber:x:event");
	xmlnode_insert_child(node, xmlnode_new("composing"));

	message = xmlnode_to_str(message_node, NULL);
	xmlnode_free(message_node);

	ret = _send_data(pb, message) >= 0;

	g_free(message);

	return ret;
}

void
bonjour_jabber_close_conversation(BonjourJabberConversation *bconv)
{
	if (bconv != NULL) {
		GList *xfers, *tmp_next;
		BonjourData *bd = bconv->pb->account->gc->proto_data;

		/* Cancel any file transfers that are waiting to begin */
		xfers = bd->xfer_lists;
		while(xfers != NULL) {
			PurpleXfer *xfer = xfers->data;
			tmp_next = xfers->next;
			/* We only need to cancel this if it hasn't actually started transferring. */
			/* This will change if we ever support IBB transfers. */
			if (strcmp(xfer->who, bconv->pb->name) == 0
					&& (purple_xfer_get_status(xfer) == PURPLE_XFER_STATUS_NOT_STARTED
					    || purple_xfer_get_status(xfer) == PURPLE_XFER_STATUS_UNKNOWN)) {
				purple_xfer_cancel_remote(xfer);
			}
			xfers = tmp_next;
		}

		/* Close the socket and remove the watcher */
		if (bconv->socket >= 0) {
			/* Send the end of the stream to the other end of the conversation */
			if (bconv->sent_stream_start == FULLY_SENT)
				send(bconv->socket, STREAM_END, strlen(STREAM_END), 0);
			/* TODO: We're really supposed to wait for "</stream:stream>" before closing the socket */
			close(bconv->socket);
		}
		if (bconv->rx_handler != 0)
			purple_input_remove(bconv->rx_handler);
		if (bconv->tx_handler > 0)
			purple_input_remove(bconv->tx_handler);

		/* Free all the data related to the conversation */
		purple_circ_buffer_destroy(bconv->tx_buf);
		if (bconv->connect_data != NULL)
			purple_proxy_connect_cancel(bconv->connect_data);
		if (bconv->stream_data != NULL) {
			struct _stream_start_data *ss = bconv->stream_data;
			g_free(ss->msg);
			g_free(ss);
		}

		if (bconv->context != NULL)
			bonjour_parser_setup(bconv);

		g_free(bconv);
	}
}

void
bonjour_jabber_stop(BonjourJabber *data)
{
	/* Close the server socket and remove the watcher */
	if (data->socket >= 0)
		close(data->socket);
	if (data->watcher_id > 0)
		purple_input_remove(data->watcher_id);

	/* Close all the conversation sockets and remove all the watchers after sending end streams */
	if (data->account->gc != NULL)
	{
		GSList *buddies, *l;

		buddies = purple_find_buddies(data->account, purple_account_get_username(data->account));
		for (l = buddies; l; l = l->next) {
			BonjourBuddy *bb = ((PurpleBuddy*) l->data)->proto_data;
			bonjour_jabber_close_conversation(bb->conversation);
			bb->conversation = NULL;
		}

		g_slist_free(buddies);
	}
}

XepIq *
xep_iq_new(void *data, XepIqType type, const char *to, const char *from, const char *id)
{
	xmlnode *iq_node = NULL;
	XepIq *iq = NULL;

	g_return_val_if_fail(data != NULL, NULL);
	g_return_val_if_fail(to != NULL, NULL);
	g_return_val_if_fail(id != NULL, NULL);

	iq_node = xmlnode_new("iq");

	xmlnode_set_attrib(iq_node, "to", to);
	xmlnode_set_attrib(iq_node, "from", from);
	xmlnode_set_attrib(iq_node, "id", id);
	switch (type) {
		case XEP_IQ_SET:
			xmlnode_set_attrib(iq_node, "type", "set");
			break;
		case XEP_IQ_GET:
			xmlnode_set_attrib(iq_node, "type", "get");
			break;
		case XEP_IQ_RESULT:
			xmlnode_set_attrib(iq_node, "type", "result");
			break;
		case XEP_IQ_ERROR:
			xmlnode_set_attrib(iq_node, "type", "error");
			break;
		case XEP_IQ_NONE:
		default:
			xmlnode_set_attrib(iq_node, "type", "none");
			break;
	}

	iq = g_new0(XepIq, 1);
	iq->node = iq_node;
	iq->type = type;
	iq->data = ((BonjourData*)data)->jabber_data;
	iq->to = (char*)to;

	return iq;
}

static gboolean
check_if_blocked(PurpleBuddy *pb)
{
	gboolean blocked = FALSE;
	GSList *l = NULL;
	PurpleAccount *acc = NULL;

	if(pb == NULL)
		return FALSE;

	acc = pb->account;

	for(l = acc->deny; l != NULL; l = l->next) {
		if(!purple_utf8_strcasecmp(pb->name, (char *)l->data)) {
			purple_debug_info("bonjour", "%s has been blocked.\n", pb->name, acc->username);
			blocked = TRUE;
			break;
		}
	}
	return blocked;
}

static void
xep_iq_parse(xmlnode *packet, PurpleConnection *connection, PurpleBuddy *pb)
{
	xmlnode *child = NULL;

	if(packet == NULL || pb == NULL)
		return;

	if(connection == NULL) {
		if(pb->account != NULL)
			connection = (pb->account)->gc;
	}

	if(check_if_blocked(pb))
		return;

	if ((child = xmlnode_get_child(packet, "si")) || (child = xmlnode_get_child(packet, "error")))
		xep_si_parse(connection, packet, pb);
	else
		xep_bytestreams_parse(connection, packet, pb);
}

int
xep_iq_send_and_free(XepIq *iq)
{
	int ret = -1;
	PurpleBuddy *pb = NULL;

	/* start the talk, reuse the message socket  */
	pb = _find_or_start_conversation ((BonjourJabber*)iq->data, iq->to);
	/* Send the message */
	if (pb != NULL) {
		/* Convert xml node into stream */
		gchar *msg = xmlnode_to_str(iq->node, NULL);
		ret = _send_data(pb, msg);
		g_free(msg);
	}

	xmlnode_free(iq->node);
	iq->node = NULL;
	g_free(iq);

	return (ret >= 0) ? 0 : -1;
}

/* This returns a ';' delimited string containing all non-localhost IPs */
const char *
purple_network_get_my_ip_ext2(int fd)
{
	char buffer[1024];
	static char ip_ext[17 * 10];
	char *tmp;
	char *tip;
	struct ifconf ifc;
	struct ifreq *ifr;
	struct sockaddr_in *sinptr;
	guint32 lhost = htonl(127 * 256 * 256 * 256 + 1);
	long unsigned int add;
	int source = fd;
	int len, count = 0;

	if (fd < 0)
		source = socket(PF_INET, SOCK_STREAM, 0);

	ifc.ifc_len = sizeof(buffer);
	ifc.ifc_req = (struct ifreq *)buffer;
	ioctl(source, SIOCGIFCONF, &ifc);

	if (fd < 0)
		close(source);

	memset(ip_ext, 0, sizeof(ip_ext));
	memcpy(ip_ext, "0.0.0.0", 7);
	tmp = buffer;
	tip = ip_ext;
	while (tmp < buffer + ifc.ifc_len && count < 10)
	{
		ifr = (struct ifreq *)tmp;
		tmp += HX_SIZE_OF_IFREQ(*ifr);

		if (ifr->ifr_addr.sa_family == AF_INET)
		{
			sinptr = (struct sockaddr_in *)&ifr->ifr_addr;
			if (sinptr->sin_addr.s_addr != lhost)
			{
				add = ntohl(sinptr->sin_addr.s_addr);
				len = g_snprintf(tip, 17, "%lu.%lu.%lu.%lu;",
					((add >> 24) & 255),
					((add >> 16) & 255),
					((add >> 8) & 255),
					add & 255);
				tip = &tip[len];
				count++;
				continue;
			}
		}
	}

	return ip_ext;
}