slp.c

msn message protocol stack

/**
 * @file msnslp.c MSNSLP support
 *
 * gaim
 *
 * Gaim 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "msn.h"
#include "slp.h"
#include "slpcall.h"
#include "slpmsg.h"
#include "slpsession.h"

#include "object.h"
#include "user.h"
#include "switchboard.h"

/* #include "slplink.h" */
/* #include "directconn.h" */

static void send_ok(MsnSlpCall *slpcall, const char *branch,
					const char *type, const char *content);

static void send_decline(MsnSlpCall *slpcall, const char *branch,
						 const char *type, const char *content);

void msn_request_user_display(MsnUser *user);

/**************************************************************************
 * Util
 **************************************************************************/

char *
get_token(const char *str, const char *start, const char *end)
{
	const char *c, *c2;

	if ((c = strstr(str, start)) == NULL)
		return NULL;

	c += strlen(start);

	if (end != NULL)
	{
		if ((c2 = strstr(c, end)) == NULL)
			return NULL;

		return g_strndup(c, c2 - c);
	}
	else
	{
		/* This has to be changed */
		return g_strdup(c);
	}

}

/**************************************************************************
 * Xfer
 **************************************************************************/

static void
msn_xfer_init(GaimXfer *xfer)
{
	MsnSlpCall *slpcall;
	/* MsnSlpLink *slplink; */
	char *content;

	gaim_debug_info("msn", "xfer_init\n");

	slpcall = xfer->data;

	/* Send Ok */
	content = g_strdup_printf("SessionID: %lu\r\n\r\n",
							  slpcall->session_id);

	send_ok(slpcall, slpcall->branch, "application/x-msnmsgr-sessionreqbody",
			content);

	g_free(content);
	msn_slplink_unleash(slpcall->slplink);
}

void
msn_xfer_cancel(GaimXfer *xfer)
{
	MsnSlpCall *slpcall;
	char *content;

	g_return_if_fail(xfer != NULL);
	g_return_if_fail(xfer->data != NULL);

	slpcall = xfer->data;

	if (gaim_xfer_get_status(xfer) == GAIM_XFER_STATUS_CANCEL_LOCAL)
	{
		if (slpcall->started)
		{
			msn_slp_call_close(slpcall);
		}
		else
		{
			content = g_strdup_printf("SessionID: %lu\r\n\r\n",
									slpcall->session_id);

			send_decline(slpcall, slpcall->branch, "application/x-msnmsgr-sessionreqbody",
						content);

			g_free(content);
			msn_slplink_unleash(slpcall->slplink);
		}
	}
}

void
msn_xfer_progress_cb(MsnSlpCall *slpcall, gsize total_length, gsize len, gsize offset)
{
	GaimXfer *xfer;

	xfer = slpcall->xfer;

	xfer->bytes_sent = (offset + len);
	xfer->bytes_remaining = total_length - (offset + len);

	gaim_xfer_update_progress(xfer);
}

void
msn_xfer_end_cb(MsnSlpCall *slpcall)
{
	if (gaim_xfer_get_status(slpcall->xfer) != GAIM_XFER_STATUS_DONE)
	{
		gaim_xfer_cancel_remote(slpcall->xfer);
	}
}

void
msn_xfer_completed_cb(MsnSlpCall *slpcall, const char *body,
					  long long size)
{
	gaim_xfer_set_completed(slpcall->xfer, TRUE);
}

/**************************************************************************
 * SLP Control
 **************************************************************************/

#if 0
static void
got_transresp(MsnSlpCall *slpcall, const char *nonce,
			  const char *ips_str, int port)
{
	MsnDirectConn *directconn;
	char **ip_addrs, **c;

	directconn = msn_directconn_new(slpcall->slplink);

	directconn->initial_call = slpcall;

	/* msn_directconn_parse_nonce(directconn, nonce); */
	directconn->nonce = g_strdup(nonce);

	ip_addrs = g_strsplit(ips_str, " ", -1);

	for (c = ip_addrs; *c != NULL; c++)
	{
		gaim_debug_info("msn", "ip_addr = %s\n", *c);
		if (msn_directconn_connect(directconn, *c, port))
			break;
	}

	g_strfreev(ip_addrs);
}
#endif

static void
send_ok(MsnSlpCall *slpcall, const char *branch,
		const char *type, const char *content)
{
	MsnSlpLink *slplink;
	MsnSlpMessage *slpmsg;

	slplink = slpcall->slplink;

	/* 200 OK */
	slpmsg = msn_slpmsg_sip_new(slpcall, 1,
								"MSNSLP/1.0 200 OK",
								branch, type, content);

#ifdef DEBUG_SLP
	slpmsg->info = "SLP 200 OK";
	slpmsg->text_body = TRUE;
#endif

	msn_slplink_queue_slpmsg(slplink, slpmsg);

	msn_slp_call_session_init(slpcall);
}

static void
send_decline(MsnSlpCall *slpcall, const char *branch,
			 const char *type, const char *content)
{
	MsnSlpLink *slplink;
	MsnSlpMessage *slpmsg;

	slplink = slpcall->slplink;

	/* 603 Decline */
	slpmsg = msn_slpmsg_sip_new(slpcall, 1,
								"MSNSLP/1.0 603 Decline",
								branch, type, content);

#ifdef DEBUG_SLP
	slpmsg->info = "SLP 603 Decline";
	slpmsg->text_body = TRUE;
#endif

	msn_slplink_queue_slpmsg(slplink, slpmsg);
}

#define MAX_FILE_NAME_LEN 0x226

static void
got_sessionreq(MsnSlpCall *slpcall, const char *branch,
			   const char *euf_guid, const char *context)
{
	if (!strcmp(euf_guid, "A4268EEC-FEC5-49E5-95C3-F126696BDBF6"))
	{
		/* Emoticon or UserDisplay */
		MsnSlpSession *slpsession;
		MsnSlpLink *slplink;
		MsnSlpMessage *slpmsg;
		MsnObject *obj;
		char *msnobj_data;
		const char *sha1c;
		const char *file_name;
		char *content;
		int len;
		int type;

		/* Send Ok */
		content = g_strdup_printf("SessionID: %lu\r\n\r\n",
								  slpcall->session_id);

		send_ok(slpcall, branch, "application/x-msnmsgr-sessionreqbody",
				content);

		g_free(content);

		slplink = slpcall->slplink;

		gaim_base64_decode(context, &msnobj_data, &len);
		obj = msn_object_new_from_string(msnobj_data);
		type = msn_object_get_type(obj);
		sha1c = msn_object_get_sha1c(obj);
		g_free(msnobj_data);

		if (!(type == MSN_OBJECT_USERTILE))
		{
			gaim_debug_error("msn", "Wrong object?\n");
			msn_object_destroy(obj);
			g_return_if_reached();
		}

		file_name = msn_object_get_real_location(obj);

		if (file_name == NULL)
		{
			gaim_debug_error("msn", "Wrong object.\n");
			msn_object_destroy(obj);
			g_return_if_reached();
		}

		slpsession = msn_slplink_find_slp_session(slplink,
												  slpcall->session_id);

		/* DATA PREP */
		slpmsg = msn_slpmsg_new(slplink);
		slpmsg->slpsession = slpsession;
		slpmsg->session_id = slpsession->id;
		msn_slpmsg_set_body(slpmsg, NULL, 4);
#ifdef DEBUG_SLP
		slpmsg->info = "SLP DATA PREP";
#endif
		msn_slplink_queue_slpmsg(slplink, slpmsg);

		/* DATA */
		slpmsg = msn_slpmsg_new(slplink);
		slpmsg->slpsession = slpsession;
		slpmsg->flags = 0x20;
#ifdef DEBUG_SLP
		slpmsg->info = "SLP DATA";
#endif
		msn_slpmsg_open_file(slpmsg, file_name);
		msn_slplink_queue_slpmsg(slplink, slpmsg);
	}
	else if (!strcmp(euf_guid, "5D3E02AB-6190-11D3-BBBB-00C04F795683"))
	{
		/* File Transfer */
		GaimAccount *account;
		GaimXfer *xfer;
		char *bin;
		int bin_len;
		guint32 file_size;
		char *file_name;
		gunichar2 *uni_name;

		account = slpcall->slplink->session->account;

		slpcall->cb = msn_xfer_completed_cb;
		slpcall->end_cb = msn_xfer_end_cb;
		slpcall->progress_cb = msn_xfer_progress_cb;
		slpcall->branch = g_strdup(branch);

		xfer = gaim_xfer_new(account, GAIM_XFER_RECEIVE,
							 slpcall->slplink->remote_user);

		gaim_base64_decode(context, &bin, &bin_len);
		file_size = GUINT32_FROM_LE(*((gsize *)bin + 2));
		
		uni_name = (gunichar2 *)(bin + 20);
		while(*uni_name != 0 && ((char *)uni_name - (bin + 20)) < MAX_FILE_NAME_LEN) {
			*uni_name = GUINT16_FROM_LE(*uni_name);
			uni_name++;
		}
		
		file_name = g_utf16_to_utf8((const gunichar2 *)(bin + 20), -1,
									NULL, NULL, NULL);

		g_free(bin);

		gaim_xfer_set_filename(xfer, file_name);
		gaim_xfer_set_size(xfer, file_size);
		gaim_xfer_set_init_fnc(xfer, msn_xfer_init);
		gaim_xfer_set_request_denied_fnc(xfer, msn_xfer_cancel);
		gaim_xfer_set_cancel_recv_fnc(xfer, msn_xfer_cancel);

		slpcall->xfer = xfer;
		xfer->data = slpcall;

		gaim_xfer_request(xfer);
	}
}

void
send_bye(MsnSlpCall *slpcall, const char *type)
{
	MsnSlpLink *slplink;
	MsnSlpMessage *slpmsg;
	char *header;

	slplink = slpcall->slplink;

	g_return_if_fail(slplink != NULL);

	header = g_strdup_printf("BYE MSNMSGR:%s MSNSLP/1.0",
							 slplink->local_user);

	slpmsg = msn_slpmsg_sip_new(slpcall, 0, header,
								"A0D624A6-6C0C-4283-A9E0-BC97B4B46D32",
								type,
								"\r\n");
	g_free(header);

#ifdef DEBUG_SLP
	slpmsg->info = "SLP BYE";
	slpmsg->text_body = TRUE;
#endif

	msn_slplink_queue_slpmsg(slplink, slpmsg);
}

static void
got_invite(MsnSlpCall *slpcall,
		   const char *branch, const char *type, const char *content)
{
	MsnSlpLink *slplink;

	slplink = slpcall->slplink;

	if (!strcmp(type, "application/x-msnmsgr-sessionreqbody"))
	{
		char *euf_guid, *context;
		char *temp;

		euf_guid = get_token(content, "EUF-GUID: {", "}\r\n");

		temp = get_token(content, "SessionID: ", "\r\n");
		if (temp != NULL)
			slpcall->session_id = atoi(temp);
		g_free(temp);

		temp = get_token(content, "AppID: ", "\r\n");
		if (temp != NULL)
			slpcall->app_id = atoi(temp);
		g_free(temp);

		context = get_token(content, "Context: ", "\r\n");

		got_sessionreq(slpcall, branch, euf_guid, context);

		g_free(context);
		g_free(euf_guid);
	}
	else if (!strcmp(type, "application/x-msnmsgr-transreqbody"))
	{
		/* A direct connection? */

		char *listening, *nonce;
		char *content;

		if (FALSE)
		{
#if 0
			MsnDirectConn *directconn;
			/* const char *ip_addr; */
			char *ip_port;
			int port;

			/* ip_addr = gaim_prefs_get_string("/core/ft/public_ip"); */
			ip_port = "5190";
			listening = "true";
			nonce = rand_guid();

			directconn = msn_directconn_new(slplink);

			/* msn_directconn_parse_nonce(directconn, nonce); */
			directconn->nonce = g_strdup(nonce);

			msn_directconn_listen(directconn);

			port = directconn->port;

			content = g_strdup_printf(
				"Bridge: TCPv1\r\n"
				"Listening: %s\r\n"
				"Nonce: {%s}\r\n"
				"Ipv4Internal-Addrs: 192.168.0.82\r\n"
				"Ipv4Internal-Port: %d\r\n"
				"\r\n",
				listening,
				nonce,
				port);
#endif
		}
		else
		{
			listening = "false";
			nonce = g_strdup("00000000-0000-0000-0000-000000000000");

			content = g_strdup_printf(
				"Bridge: TCPv1\r\n"
				"Listening: %s\r\n"
				"Nonce: {%s}\r\n"
				"\r\n",
				listening,
				nonce);
		}

		send_ok(slpcall, branch,
				"application/x-msnmsgr-transrespbody", content);

		g_free(content);