src/protocols/msn/msn.c

#include "config.h"

#ifndef _WIN32
#include <unistd.h>
#else
#include <winsock.h>
#include <io.h>
#endif


#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
#ifndef _WIN32
#include <netdb.h>
#endif
#include "gaim.h"
#include "prpl.h"
#include "proxy.h"
#include "md5.h"

#ifdef _WIN32
#include "win32dep.h"
#include "stdint.h"
#endif

#include "pixmaps/protocols/msn/msn_online.xpm"
#include "pixmaps/protocols/msn/msn_away.xpm"
#include "pixmaps/protocols/msn/msn_occ.xpm"

static struct prpl *my_protocol = NULL;

/* for win32 compatability */
G_MODULE_IMPORT GSList *connections;

#define MSN_BUF_LEN 8192
#define MIME_HEADER	"MIME-Version: 1.0\r\n" \
			"Content-Type: text/plain; charset=UTF-8\r\n" \
			"User-Agent: Gaim/" VERSION "\r\n" \
			"X-MMS-IM-Format: FN=Arial; EF=; CO=0; PF=0\r\n\r\n"

#define HOTMAIL_URL "http://www.hotmail.com/cgi-bin/folders"
#define PASSPORT_URL "http://lc1.law13.hotmail.passport.com/cgi-bin/dologin?login="

#define MSN_ONLINE  1
#define MSN_BUSY    2
#define MSN_IDLE    3
#define MSN_BRB     4
#define MSN_AWAY    5
#define MSN_PHONE   6
#define MSN_LUNCH   7
#define MSN_OFFLINE 8
#define MSN_HIDDEN  9

#define USEROPT_HOTMAIL 0

#define USEROPT_MSNSERVER 3
#define MSN_SERVER "messenger.hotmail.com"
#define USEROPT_MSNPORT 4
#define MSN_PORT 1863

#define MSN_TYPING_RECV_TIMEOUT 6
#define MSN_TYPING_SEND_TIMEOUT	4

struct msn_file_transfer {
	enum { MFT_SENDFILE_IN, MFT_SENDFILE_OUT } type;
	struct file_transfer *xfer;
	struct gaim_connection *gc;

	int fd;
	int inpa;

	char *filename;

	char *sn;
	char ip[16];
	int port;

	uint32_t cookie;
	uint32_t authcookie;

	int len;

	char *rxqueue;
	int rxlen;
	gboolean msg;
	char *msguser;
	int msglen;
};

struct msn_data {
	int fd;
	uint32_t trId;
	int inpa;

	char *rxqueue;
	int rxlen;
	gboolean msg;
	char *msguser;
	int msglen;

	GSList *switches;
	GSList *fl;
	GSList *permit;
	GSList *deny;
	GSList *file_transfers;

	char *kv;
	char *sid;
	char *mspauth;
	unsigned long sl;
	char *passport;

};

struct msn_switchboard {
	struct gaim_connection *gc;
	struct gaim_conversation *chat;
	int fd;
	int inpa;

	char *rxqueue;
	int rxlen;
	gboolean msg;
	char *msguser;
	int msglen;

	char *sessid;
	char *auth;
	uint32_t trId;
	int total;
	char *user;
	GSList *txqueue;
};

struct msn_buddy {
	char *user;
	char *friend;
};

static void msn_login_callback(gpointer, gint, GaimInputCondition);
static void msn_login_xfr_connect(gpointer, gint, GaimInputCondition);
static struct msn_file_transfer *find_mft_by_cookie(struct gaim_connection *gc,
													unsigned long cookie);
static struct msn_file_transfer *find_mft_by_xfer(struct gaim_connection *gc,
												  struct file_transfer *xfer);

#define GET_NEXT(tmp)	while (*(tmp) && *(tmp) != ' ') \
				(tmp)++; \
			*(tmp)++ = 0; \
			while (*(tmp) && *(tmp) == ' ') \
				(tmp)++;

#define GET_NEXT_LINE(tmp,s)	strsep (&tmp, " "); s = strsep (&tmp, "\r");

static char *msn_normalize(const char *s)
{
	static char buf[BUF_LEN];

	g_return_val_if_fail(s != NULL, NULL);

	g_snprintf(buf, sizeof(buf), "%s%s", s, strchr(s, '@') ? "" : "@hotmail.com");

	return buf;
}

static int msn_write(int fd, void *data, int len)
{
	debug_printf("MSN C: %s", (char *)data);
	return write(fd, data, len);
}

static char *url_decode(const char *msg)
{
	static char buf[MSN_BUF_LEN];
	int i, j = 0;

	bzero(buf, sizeof(buf));
	for (i = 0; i < strlen(msg); i++) {
		char hex[3];
		if (msg[i] != '%') {
			buf[j++] = msg[i];
			continue;
		}
		strncpy(hex, msg + ++i, 2); hex[2] = 0;
		/* i is pointing to the start of the number */
		i++; /* now it's at the end and at the start of the for loop
			will be at the next character */
		buf[j++] = strtol(hex, NULL, 16);
	}
	buf[j] = 0;

	return buf;
}

static char *url_encode(const char *msg)
{
	static char buf[MSN_BUF_LEN];
	int i, j = 0;

	bzero(buf, sizeof(buf));
	for (i = 0; i < strlen(msg); i++) {
		if (isalnum(msg[i]))
			buf[j++] = msg[i];
		else {
			sprintf(buf + j, "%%%02x", (unsigned char)msg[i]);
			j += 3;
		}
	}
	buf[j] = 0;

	return buf;
}

static char *handle_errcode(char *buf, gboolean show)
{
	int errcode;
	static char msg[MSN_BUF_LEN];

	buf[4] = 0;
	errcode = atoi(buf);

	switch (errcode) {
		case 200:
			g_snprintf(msg, sizeof(msg), _("Syntax Error (probably a Gaim bug)"));
			break;
		case 201:
			g_snprintf(msg, sizeof(msg), _("Invalid Parameter (probably a Gaim bug)"));
			break;
		case 205:
			g_snprintf(msg, sizeof(msg), _("Invalid User"));
			break;
		case 206:
			g_snprintf(msg, sizeof(msg), _("Fully Qualified Domain Name missing"));
			break;
		case 207:
			g_snprintf(msg, sizeof(msg), _("Already Login"));
			break;
		case 208:
			g_snprintf(msg, sizeof(msg), _("Invalid Username"));
			break;
		case 209:
			g_snprintf(msg, sizeof(msg), _("Invalid Friendly Name"));
			break;
		case 210:
			g_snprintf(msg, sizeof(msg), _("List Full"));
			break;
		case 215:
			g_snprintf(msg, sizeof(msg), _("Already there"));
			break;
		case 216:
			g_snprintf(msg, sizeof(msg), _("Not on list"));
			break;
		case 217:
			g_snprintf(msg, sizeof(msg), _("User is offline"));
			break;
		case 218:
			g_snprintf(msg, sizeof(msg), _("Already in the mode"));
			break;
		case 219:
			g_snprintf(msg, sizeof(msg), _("Already in opposite list"));
			break;
		case 280:
			g_snprintf(msg, sizeof(msg), _("Switchboard failed"));
			break;
		case 281:
			g_snprintf(msg, sizeof(msg), _("Notify Transfer failed"));
			break;

		case 300:
			g_snprintf(msg, sizeof(msg), _("Required fields missing"));
			break;
		case 302:
			g_snprintf(msg, sizeof(msg), _("Not logged in"));
			break;

		case 500:
			g_snprintf(msg, sizeof(msg), _("Internal server error"));
			break;
		case 501:
			g_snprintf(msg, sizeof(msg), _("Database server error"));
			break;
		case 510:
			g_snprintf(msg, sizeof(msg), _("File operation error"));
			break;
		case 520:
			g_snprintf(msg, sizeof(msg), _("Memory allocation error"));
			break;

		case 600:
			g_snprintf(msg, sizeof(msg), _("Server busy"));
			break;
		case 601:
			g_snprintf(msg, sizeof(msg), _("Server unavailable"));
			break;
		case 602:
			g_snprintf(msg, sizeof(msg), _("Peer Notification server down"));
			break;
		case 603:
			g_snprintf(msg, sizeof(msg), _("Database connect error"));
			break;
		case 604:
			g_snprintf(msg, sizeof(msg), _("Server is going down (abandon ship)"));
			break;

		case 707:
			g_snprintf(msg, sizeof(msg), _("Error creating connection"));
			break;
		case 711:
			g_snprintf(msg, sizeof(msg), _("Unable to write"));
			break;
		case 712:
			g_snprintf(msg, sizeof(msg), _("Session overload"));
			break;
		case 713:
			g_snprintf(msg, sizeof(msg), _("User is too active"));
			break;
		case 714:
			g_snprintf(msg, sizeof(msg), _("Too many sessions"));
			break;
		case 715:
			g_snprintf(msg, sizeof(msg), _("Not expected"));
			break;
		case 717:
			g_snprintf(msg, sizeof(msg), _("Bad friend file"));
			break;

		case 911:
			g_snprintf(msg, sizeof(msg), _("Authentication failed"));
			break;
		case 913:
			g_snprintf(msg, sizeof(msg), _("Not allowed when offline"));
			break;
	        case 920:
			g_snprintf(msg, sizeof(msg), _("Not accepting new users"));
			break;
	        case 924:
			g_snprintf(msg, sizeof(msg), _("User unverified"));
			break;
		default:
			g_snprintf(msg, sizeof(msg), _("Unknown Error Code"));
			break;
	}

	if (show)
		do_error_dialog(msg, NULL, GAIM_ERROR);

	return msg;
}

static void handle_hotmail(struct gaim_connection *gc, char *data)
{
	char login_url[2048];
	char buf[MSN_BUF_LEN];
	struct msn_data *md = gc->proto_data;

	if (strchr(gc->username, '@') != strstr(gc->username, "@hotmail.com"))
		/* We can only get Hotmail notification from hotmail users */
		return;

	if (!md->passport) {
		g_snprintf(buf, sizeof(buf), "URL %u INBOX\r\n", ++md->trId);

		if (msn_write(md->fd, buf, strlen(buf)) < 0) {
			return;
		}
	} else {
		g_snprintf(login_url, sizeof(login_url), "%s", md->passport);

		if (strstr(data, "Content-Type: text/x-msmsgsinitialemailnotification;")) {
			char *x = strstr(data, "Inbox-Unread:");
			if (!x) return;
			x += strlen("Inbox-Unread: ");
			connection_has_mail(gc, atoi(x), NULL, NULL, login_url);
		} else if (strstr(data, "Content-Type: text/x-msmsgsemailnotification;")) {
			char *from = strstr(data, "From:");
			char *subject = strstr(data, "Subject:");
			char *x;
			if (!from || !subject) {
				connection_has_mail(gc, 1, NULL, NULL, login_url);
				return;
			}
			from += strlen("From: ");
			x = strstr(from, "\r\n"); *x = 0;
			subject += strlen("Subject: ");
			x = strstr(subject, "\r\n"); *x = 0;
			connection_has_mail(gc, -1, from, subject, login_url);
		}
	}
}

static struct msn_switchboard *msn_find_switch(struct gaim_connection *gc, char *id)
{
	struct msn_data *md = gc->proto_data;
	GSList *m = md->switches;

	while (m) {
		struct msn_switchboard *ms = m->data;
		m = m->next;
		if ((ms->total <= 1) && !g_strcasecmp(ms->user, id))
			return ms;
	}

	return NULL;
}

static struct msn_switchboard *msn_find_switch_by_id(struct gaim_connection *gc, int id)
{
	struct msn_data *md = gc->proto_data;
	GSList *m = md->switches;

	while (m) {
		struct msn_switchboard *ms = m->data;
		m = m->next;
		if (ms->chat && gaim_chat_get_id(GAIM_CHAT(ms->chat)) == id)
			return ms;
	}

	return NULL;
}

static struct msn_switchboard *msn_find_writable_switch(struct gaim_connection *gc)
{
	struct msn_data *md = gc->proto_data;
	GSList *m = md->switches;

	while (m) {
		struct msn_switchboard *ms = m->data;
		m = m->next;
		if (ms->txqueue)
			return ms;
	}

	return NULL;
}

static void msn_kill_switch(struct msn_switchboard *ms)
{
	struct gaim_connection *gc = ms->gc;
	struct msn_data *md = gc->proto_data;

	if (ms->inpa)
		gaim_input_remove(ms->inpa);
	close(ms->fd);
	g_free(ms->rxqueue);
	if (ms->msg)
		g_free(ms->msguser);
	if (ms->sessid)
		g_free(ms->sessid);
	g_free(ms->auth);
	if (ms->user)
		g_free(ms->user);
	while (ms->txqueue) {
		g_free(ms->txqueue->data);
		ms->txqueue = g_slist_remove(ms->txqueue, ms->txqueue->data);
	}
	if (ms->chat)
		serv_got_chat_left(gc, gaim_chat_get_id(GAIM_CHAT(ms->chat)));

	md->switches = g_slist_remove(md->switches, ms);

	g_free(ms);
}

static int msn_process_switch(struct msn_switchboard *ms, char *buf)
{
	struct gaim_connection *gc = ms->gc;
	char sendbuf[MSN_BUF_LEN];
	static int id = 0;

	if (!g_strncasecmp(buf, "ACK", 3)) {
	} else if (!g_strncasecmp(buf, "ANS", 3)) {
		if (ms->chat)
			gaim_chat_add_user(GAIM_CHAT(ms->chat), gc->username, NULL);
	} else if (!g_strncasecmp(buf, "BYE", 3)) {
		char *user, *tmp = buf;
		GET_NEXT(tmp);
		user = tmp;

		if (ms->chat) {
			gaim_chat_remove_user(GAIM_CHAT(ms->chat), user, NULL);
		} else {
			char msgbuf[256];
			const char *username;
			struct gaim_conversation *cnv;
			struct buddy *b;

			if ((b = find_buddy(gc->user, user)) != NULL)
				username = get_buddy_alias(b);
			else
				username = user;

			g_snprintf(msgbuf, sizeof(msgbuf),
					   _("%s has closed the conversation window"), username);

			if ((cnv = gaim_find_conversation(user)))
				gaim_conversation_write(cnv, NULL, msgbuf, -1,
										WFLAG_SYSTEM, time(NULL));

			msn_kill_switch(ms);
			return 0;
		}
	} else if (!g_strncasecmp(buf, "CAL", 3)) {
	} else if (!g_strncasecmp(buf, "IRO", 3)) {
		char *tot, *user, *tmp = buf;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		GET_NEXT(tmp);
		tot = tmp;
		GET_NEXT(tmp);
		ms->total = atoi(tot);
		user = tmp;
		GET_NEXT(tmp);

		if (ms->total > 1) {
			if (!ms->chat)
				ms->chat = serv_got_joined_chat(gc, ++id, "MSN Chat");

			gaim_chat_add_user(GAIM_CHAT(ms->chat), user, NULL);
		} 
	} else if (!g_strncasecmp(buf, "JOI", 3)) {
		char *user, *tmp = buf;
		GET_NEXT(tmp);
		user = tmp;
		GET_NEXT(tmp);

		if (ms->total == 1) {
			ms->chat = serv_got_joined_chat(gc, ++id, "MSN Chat");
			gaim_chat_add_user(GAIM_CHAT(ms->chat), ms->user, NULL);
			gaim_chat_add_user(GAIM_CHAT(ms->chat), gc->username, NULL);
			g_free(ms->user);
			ms->user = NULL;
		}
		if (ms->chat)
			gaim_chat_add_user(GAIM_CHAT(ms->chat), user, NULL);
		ms->total++;
		while (ms->txqueue) {
			char *send = add_cr(ms->txqueue->data);
			g_snprintf(sendbuf, sizeof(sendbuf), "MSG %u N %d\r\n%s%s", ++ms->trId,
					strlen(MIME_HEADER) + strlen(send),
					MIME_HEADER, send);
			g_free(ms->txqueue->data);
			ms->txqueue = g_slist_remove(ms->txqueue, ms->txqueue->data);
			if (msn_write(ms->fd, sendbuf, strlen(sendbuf)) < 0) {
				msn_kill_switch(ms);
				return 0;
			}
			debug_printf("\n");
		}
	} else if (!g_strncasecmp(buf, "MSG", 3)) {
		char *user, *tmp = buf;
		int length;

		GET_NEXT(tmp);
		user = tmp;

		GET_NEXT(tmp);

		GET_NEXT(tmp);
		length = atoi(tmp);

		ms->msg = TRUE;
		ms->msguser = g_strdup(user);
		ms->msglen = length;
	} else if (!g_strncasecmp(buf, "NAK", 3)) {
		do_error_dialog(_("An MSN message may not have been received."), NULL, GAIM_ERROR);
	} else if (!g_strncasecmp(buf, "NLN", 3)) {
	} else if (!g_strncasecmp(buf, "OUT", 3)) {
		if (ms->chat)
			serv_got_chat_left(gc, gaim_chat_get_id(GAIM_CHAT(ms->chat)));
		msn_kill_switch(ms);
		return 0;
	} else if (!g_strncasecmp(buf, "USR", 3)) {
		/* good, we got USR, now we need to find out who we want to talk to */
		struct msn_switchboard *ms = msn_find_writable_switch(gc);

		if (!ms)
			return 0;

		g_snprintf(sendbuf, sizeof(sendbuf), "CAL %u %s\r\n", ++ms->trId, ms->user);
		if (msn_write(ms->fd, sendbuf, strlen(sendbuf)) < 0) {
			msn_kill_switch(ms);
			return 0;
		}
	} else if (isdigit(*buf)) {
		handle_errcode(buf, TRUE);
	} else {
		debug_printf("Unhandled message!\n");
	}

	return 1;
}

static char *msn_parse_format(char *mime)
{
	char *cur;
	GString *ret = g_string_new(NULL);
	guint colorbuf;
	char *colors = (char *)(&colorbuf);
	

	cur = strstr(mime, "FN=");
	if (cur && (*(cur = cur + 3) != ';')) {
		ret = g_string_append(ret, "<FONT FACE=\"");
		while (*cur && *cur != ';') {
			ret = g_string_append_c(ret, *cur);
			cur++;
		}
		ret = g_string_append(ret, "\">");
	}
	
	cur = strstr(mime, "EF=");
	if (cur && (*(cur = cur + 3) != ';')) {
		while (*cur && *cur != ';') {
			ret = g_string_append_c(ret, '<');
			ret = g_string_append_c(ret, *cur);
			ret = g_string_append_c(ret, '>');
			cur++;
		}
	}
	
	cur = strstr(mime, "CO=");
	if (cur && (*(cur = cur + 3) != ';')) {
		if (sscanf (cur, "%x;", &colorbuf) == 1) {
			char tag[64];
			g_snprintf(tag, sizeof(tag), "<FONT COLOR=\"#%02hhx%02hhx%02hhx\">", colors[0], colors[1], colors[2]);
			ret = g_string_append(ret, tag);
		}
	}
	
	cur = url_decode(ret->str);
	g_string_free(ret, TRUE);
	return cur;
}

static int msn_process_msnftp(struct msn_file_transfer *mft, char *buf)
{
	struct gaim_connection *gc = mft->gc;
	char sendbuf[MSN_BUF_LEN];

	if (!g_strncasecmp(buf, "VER MSNFTP", 10)) {

		/* Send the USR string. */
		g_snprintf(sendbuf, sizeof(sendbuf), "USR %s %lu\r\n",
				   gc->username, (unsigned long)mft->authcookie);

		if (msn_write(mft->fd, sendbuf, strlen(sendbuf)) < 0) {
			/* TODO: Clean up */
			return 0;
		}
	}
	else if (!g_strncasecmp(buf, "FIL", 3)) {
		
		char *tmp = buf;

		GET_NEXT(tmp);

		mft->len = atoi(tmp);

		/* Send the TFR string, to request a start of transfer. */
		g_snprintf(sendbuf, sizeof(sendbuf), "TFR\r\n");

		gaim_input_remove(mft->inpa);
		mft->inpa = 0;

		if (msn_write(mft->fd, sendbuf, strlen(sendbuf)) < 0) {
			/* TODO: Clean up */
			return 0;
		}

		if (transfer_in_do(mft->xfer, mft->fd, mft->filename, mft->len)) {
			debug_printf("MSN: transfer_in_do failed\n");
		}
	}

	return 1;
}

static void msn_msnftp_callback(gpointer data, gint source,
								GaimInputCondition cond)
{
	struct msn_file_transfer *mft = (struct msn_file_transfer *)data;
	char buf[MSN_BUF_LEN];
	int cont = 1;
	int len;

	mft->fd = source;

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

	if (len <= 0) {
		/* TODO: Kill mft. */
		return;
	}

	mft->rxqueue = g_realloc(mft->rxqueue, len + mft->rxlen);
	memcpy(mft->rxqueue + mft->rxlen, buf, len);
	mft->rxlen += len;

	while (cont) {
		char *end = mft->rxqueue;
		int cmdlen;
		char *cmd;
		int i = 0;

		if (!mft->rxlen)
			return;

		while (i + 1 < mft->rxlen) {
			if (*end == '\r' && end[1] == '\n')
				break;
			end++; i++;
		}
		if (i + 1 == mft->rxlen)
			return;

		cmdlen = end - mft->rxqueue + 2;
		cmd = mft->rxqueue;
		mft->rxlen -= cmdlen;
		if (mft->rxlen) {
			mft->rxqueue = g_memdup(cmd + cmdlen, mft->rxlen);
		} else {
			mft->rxqueue = NULL;
			cmd = g_realloc(cmd, cmdlen + 1);
		}
		cmd[cmdlen] = 0;

		g_strchomp(cmd);
		cont = msn_process_msnftp(mft, cmd);

		g_free(cmd);
	}
}

static void msn_msnftp_connect(gpointer data, gint source,
							   GaimInputCondition cond)
{
	struct msn_file_transfer *mft = (struct msn_file_transfer *)data;
	struct gaim_connection *gc = mft->gc;
	char buf[MSN_BUF_LEN];

	if (source == -1 || !g_slist_find(connections, gc)) {
		debug_printf("Error establishing MSNFTP connection\n");
		close(source);
		/* TODO: Clean up */
		return;
	}

	if (mft->fd != source)
		mft->fd = source;

	g_snprintf(buf, sizeof(buf), "VER MSNFTP\r\n");

	if (msn_write(mft->fd, buf, strlen(buf)) < 0) {
		/* TODO: Clean up */
		return;
	}

	mft->inpa = gaim_input_add(mft->fd, GAIM_INPUT_READ,
							   msn_msnftp_callback, mft);
}

static void msn_process_ft_msg(struct msn_switchboard *ms, char *msg)
{
	struct msn_file_transfer *mft;
	struct msn_data *md = ms->gc->proto_data;
	char *tmp = msg;

	if (strstr(msg, "Application-GUID: {5D3E02AB-6190-11d3-BBBB-00C04F795683}") &&
		strstr(msg, "Invitation-Command: INVITE")) {

		/*
		 * First invitation message, requesting an ACCEPT or CANCEL from
		 * the recipient. Used in incoming file transfers.
		 */

		char *filename;
		char *cookie_s, *filesize_s;
		size_t filesize;

		tmp = strstr(msg, "Invitation-Cookie:");
		GET_NEXT_LINE(tmp, cookie_s);
		GET_NEXT_LINE(tmp, filename);
		GET_NEXT_LINE(tmp, filesize_s);

		mft = g_new0(struct msn_file_transfer, 1);
		mft->gc = ms->gc;
		mft->type = MFT_SENDFILE_IN;
		mft->sn = g_strdup(ms->msguser);
		mft->cookie = atoi(cookie_s);
		mft->filename = g_strdup(filename);

		filesize = atoi(filesize_s);

		md->file_transfers = g_slist_append(md->file_transfers, mft);

		mft->xfer = transfer_in_add(ms->gc, ms->msguser,
									mft->filename, filesize, 1, NULL);
	}
	else if (strstr(msg, "Invitation-Command: ACCEPT")) {

		/*
		 * XXX I hope these checks don't return false positives, but they
		 *     seem like they should work. The only issue is alternative
		 *     protocols, *maybe*.
		 */

		if (strstr(msg, "AuthCookie:")) {

			/*
			 * Second invitation request, sent after the recipient accepts
			 * the request. Used in incoming file transfers.
			 */

			char *cookie_s, *ip, *port_s, *authcookie_s;

			tmp = strstr(msg, "Invitation-Cookie:");
			GET_NEXT_LINE(tmp, cookie_s);
			GET_NEXT_LINE(tmp, ip);
			GET_NEXT_LINE(tmp, port_s);
			GET_NEXT_LINE(tmp, authcookie_s);
			GET_NEXT_LINE(tmp, authcookie_s);

			mft = find_mft_by_cookie(ms->gc, atoi(cookie_s));

			if (!mft)
			{
				debug_printf("MSN: Cookie not found. File transfer aborted.\n");
				return;
			}

			strncpy(mft->ip, ip, 16);
			mft->port = atoi(port_s);
			mft->authcookie = atol(authcookie_s);

			if (proxy_connect(mft->ip, mft->port, msn_msnftp_connect, mft) != 0) {
				md->file_transfers = g_slist_remove(md->file_transfers, mft);
				return;
			}
		}
		else
		{
			/*
			 * An accept message from the recipient. Used in outgoing
			 * file transfers.
			 */
		}
	}
}

static void msn_process_switch_msg(struct msn_switchboard *ms, char *msg)
{
	char *content, *agent, *format;
	char *message = NULL;
	int flags = 0;

	agent = strstr(msg, "User-Agent: ");
	if (agent) {
		if (!g_strncasecmp(agent, "User-Agent: Gaim", strlen("User-Agent: Gaim")))
			flags |= IM_FLAG_GAIMUSER;
	}

	format = strstr(msg, "X-MMS-IM-Format: ");
	if (format) {
		format = msn_parse_format(format);
	} else {
		format = NULL;
	}

	content = strstr(msg, "Content-Type: ");
	if (!content)
		return;
	if (!g_strncasecmp(content, "Content-Type: text/x-msmsgscontrol\r\n",
			   strlen(  "Content-Type: text/x-msmsgscontrol\r\n"))) {
		if (strstr(content,"TypingUser: ") && !ms->chat) {
			serv_got_typing(ms->gc, ms->msguser, MSN_TYPING_RECV_TIMEOUT, TYPING);
			return;
		} 

	} else if (!g_strncasecmp(content, "Content-Type: text/x-msmsgsinvite;",
							  strlen("Content-Type: text/x-msmsgsinvite;"))) {

		/*
		 * NOTE: Other things, such as voice communication, would go in
		 *       here too (since they send the same Content-Type). However,
		 *       this is the best check for file transfer messages, so I'm
		 *       calling msn_process_ft_invite_msg(). If anybody adds support
		 *       for anything else that sends a text/x-msmsgsinvite, perhaps
		 *       this should be changed. For now, it stays.
		 */
		msn_process_ft_msg(ms, content);

	} else if (!g_strncasecmp(content, "Content-Type: text/plain",
				  strlen("Content-Type: text/plain"))) {
		
	
		char *skiphead;
		skiphead = strstr(msg, "\r\n\r\n");
		if (!skiphead || !skiphead[4]) {
			return;
		}
		skiphead += 4;
		strip_linefeed(skiphead);
		
		if (format) { 
			message = g_strdup_printf("%s%s", format, skiphead);
		} else {
			message = g_strdup(skiphead);
		}
		
		if (ms->chat)
			serv_got_chat_in(ms->gc, gaim_chat_get_id(GAIM_CHAT(ms->chat)),
							 ms->msguser, flags, message, time(NULL));
		else
			serv_got_im(ms->gc, ms->msguser, message, flags, time(NULL), -1);

		g_free(message);
	}
}

static void msn_switchboard_callback(gpointer data, gint source, GaimInputCondition cond)
{
	struct msn_switchboard *ms = data;
	char buf[MSN_BUF_LEN];
	int cont = 1;
	int len;
	
	ms->fd = source;
	len = read(ms->fd, buf, sizeof(buf));
	if (len <= 0) {
		msn_kill_switch(ms);
		return;
	}

	ms->rxqueue = g_realloc(ms->rxqueue, len + ms->rxlen);
	memcpy(ms->rxqueue + ms->rxlen, buf, len);
	ms->rxlen += len;

	while (cont) {
		if (!ms->rxlen)
			return;

		if (ms->msg) {
			char *msg;
			if (ms->msglen > ms->rxlen)
				return;
			msg = ms->rxqueue;
			ms->rxlen -= ms->msglen;
			if (ms->rxlen) {
				ms->rxqueue = g_memdup(msg + ms->msglen, ms->rxlen);
			} else {
				ms->rxqueue = NULL;
				msg = g_realloc(msg, ms->msglen + 1);
			}
			msg[ms->msglen] = 0;
			ms->msglen = 0;
			ms->msg = FALSE;

			msn_process_switch_msg(ms, msg);

			g_free(ms->msguser);
			g_free(msg);
		} else {
			char *end = ms->rxqueue;
			int cmdlen;
			char *cmd;
			int i = 0;

			while (i + 1 < ms->rxlen) {
				if (*end == '\r' && end[1] == '\n')
					break;
				end++; i++;
			}
			if (i + 1 == ms->rxlen)
				return;

			cmdlen = end - ms->rxqueue + 2;
			cmd = ms->rxqueue;
			ms->rxlen -= cmdlen;
			if (ms->rxlen) {
				ms->rxqueue = g_memdup(cmd + cmdlen, ms->rxlen);
			} else {
				ms->rxqueue = NULL;
				cmd = g_realloc(cmd, cmdlen + 1);
			}
			cmd[cmdlen] = 0;

			debug_printf("MSN S: %s", cmd);
			g_strchomp(cmd);
			cont = msn_process_switch(ms, cmd);

			g_free(cmd);
		}
	}
}

static void msn_rng_connect(gpointer data, gint source, GaimInputCondition cond)
{
	struct msn_switchboard *ms = data;
	struct gaim_connection *gc = ms->gc;
	struct msn_data *md;
	char buf[MSN_BUF_LEN];

	if (source == -1 || !g_slist_find(connections, gc)) {
		close(source);
		g_free(ms->sessid);
		g_free(ms->auth);
		g_free(ms);
		return;
	}

	md = gc->proto_data;

	if (ms->fd != source)
		ms->fd = source;

	g_snprintf(buf, sizeof(buf), "ANS %u %s %s %s\r\n", ++ms->trId, gc->username, ms->auth, ms->sessid);
	if (msn_write(ms->fd, buf, strlen(buf)) < 0) {
		close(ms->fd);
		g_free(ms->sessid);
		g_free(ms->auth);
		g_free(ms);
		return;
	}

	md->switches = g_slist_append(md->switches, ms);
	ms->inpa = gaim_input_add(ms->fd, GAIM_INPUT_READ, msn_switchboard_callback, ms);
}

static void msn_ss_xfr_connect(gpointer data, gint source, GaimInputCondition cond)
{
	struct msn_switchboard *ms = data;
	struct gaim_connection *gc = ms->gc;
	char buf[MSN_BUF_LEN];

	if (source == -1 || !g_slist_find(connections, gc)) {
		close(source);
		if (g_slist_find(connections, gc)) {
			msn_kill_switch(ms);
			do_error_dialog(_("Gaim was unable to send an MSN message"),
					_("Gaim encountered an error communicating with the "
					  "MSN switchboard server.  Please try again later."), GAIM_ERROR);
		}
		return;
	}

	if (ms->fd != source)
		ms->fd = source;

	g_snprintf(buf, sizeof(buf), "USR %u %s %s\r\n", ++ms->trId, gc->username, ms->auth);
	if (msn_write(ms->fd, buf, strlen(buf)) < 0) {
		g_free(ms->auth);
		g_free(ms);
		return;
	}

	ms->inpa = gaim_input_add(ms->fd, GAIM_INPUT_READ, msn_switchboard_callback, ms);
}

struct msn_add_permit {
	struct gaim_connection *gc;
	char *user;
	char *friend;
};

static void msn_accept_add(struct msn_add_permit *map)
{
	if(g_slist_find(connections, map->gc)) {
		struct msn_data *md = map->gc->proto_data;
		char buf[MSN_BUF_LEN];

		g_snprintf(buf, sizeof(buf), "ADD %u AL %s %s\r\n", ++md->trId, map->user, url_encode(map->friend));

		if (msn_write(md->fd, buf, strlen(buf)) < 0) {
			hide_login_progress(map->gc, _("Write error"));
			signoff(map->gc);
			return;
		}
		gaim_privacy_permit_add(map->gc->user, map->user);
		build_allow_list(); /* er. right. we'll need to have a thing for this in CUI too */
		show_got_added(map->gc, NULL, map->user, map->friend, NULL);
	}

	g_free(map->user);
	g_free(map->friend);
	g_free(map);
}

static void msn_cancel_add(struct msn_add_permit *map)
{
	if(g_slist_find(connections, map->gc)) {
		struct msn_data *md = map->gc->proto_data;
		char buf[MSN_BUF_LEN];

		g_snprintf(buf, sizeof(buf), "ADD %u BL %s %s\r\n", ++md->trId, map->user, url_encode(map->friend));
		if (msn_write(md->fd, buf, strlen(buf)) < 0) {
			hide_login_progress(map->gc, _("Write error"));
			signoff(map->gc);
			return;
		}
		gaim_privacy_deny_add(map->gc->user, map->user);
		build_block_list();
	}

	g_free(map->user);
	g_free(map->friend);
	g_free(map);
}

static int msn_process_main(struct gaim_connection *gc, char *buf)
{
	struct msn_data *md = gc->proto_data;
	char sendbuf[MSN_BUF_LEN];

	if (!g_strncasecmp(buf, "ADD", 3)) {
		char *list, *user, *friend, *tmp = buf;
		struct msn_add_permit *ap;
		GSList *perm = gc->user->permit;
		char msg[MSN_BUF_LEN];

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		list = tmp;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		user = tmp;

		GET_NEXT(tmp);
		friend = url_decode(tmp);

		if (g_strcasecmp(list, "RL"))
			return 1;

		while (perm) {
			if (!g_strcasecmp(perm->data, user))
				return 1;
			perm = perm->next;
		}

		ap = g_new0(struct msn_add_permit, 1);
		ap->user = g_strdup(user);
		ap->friend = g_strdup(friend);
		ap->gc = gc;

		g_snprintf(msg, sizeof(msg), _("The user %s (%s) wants to add %s to his or her buddy list."),
				ap->user, ap->friend, ap->gc->username);

		do_ask_dialog(msg, NULL, ap, _("Authorize"), msn_accept_add, _("Deny"), msn_cancel_add, my_protocol->plug ? my_protocol->plug->handle : NULL, FALSE);
	} else if (!g_strncasecmp(buf, "BLP", 3)) {
		char *type, *tmp = buf;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		GET_NEXT(tmp);
		type = tmp;

		if (!g_strcasecmp(type, "AL")) {
			/* If the current setting is AL, messages
			 * from users who are not in BL will be delivered
			 *
			 * In other words, deny some */
			gc->user->permdeny = DENY_SOME;
		} else {
			/* If the current
			 * setting is BL, only messages from people who are in the AL will be
			 * delivered.
			 *
			 * In other words, permit some */
			gc->user->permdeny = PERMIT_SOME;
		}
	} else if (!g_strncasecmp(buf, "BPR", 3)) {
	} else if (!g_strncasecmp(buf, "CHG", 3)) {
	} else if (!g_strncasecmp(buf, "CHL", 3)) {
		char *hash = buf;
		char buf2[MSN_BUF_LEN];
		md5_state_t st;
		md5_byte_t di[16];
		int i;

		GET_NEXT(hash);
		GET_NEXT(hash);

		md5_init(&st);
		md5_append(&st, (const md5_byte_t *)hash, strlen(hash));
		md5_append(&st, (const md5_byte_t *)"Q1P7W2E4J9R8U3S5", strlen("Q1P7W2E4J9R8U3S5"));
		md5_finish(&st, di);

		g_snprintf(sendbuf, sizeof(sendbuf), "QRY %u msmsgs@msnmsgr.com 32\r\n", ++md->trId);
		for (i = 0; i < 16; i++) {
			g_snprintf(buf2, sizeof(buf2), "%02x", di[i]);
			strcat(sendbuf, buf2);
		}

		if (msn_write(md->fd, sendbuf, strlen(sendbuf)) < 0) {
			hide_login_progress(gc, _("Unable to write to server"));
			signoff(gc);
		}

		debug_printf("\n");
	} else if (!g_strncasecmp(buf, "FLN", 3)) {
		char *usr = buf;

		GET_NEXT(usr);
		serv_got_update(gc, usr, 0, 0, 0, 0, 0, 0);
	} else if (!g_strncasecmp(buf, "GTC", 3)) {
	} else if (!g_strncasecmp(buf, "INF", 3)) {
	} else if (!g_strncasecmp(buf, "ILN", 3)) {
		char *state, *user, *friend, *tmp = buf;
		int status = 0;

		GET_NEXT(tmp);

		GET_NEXT(tmp);
		state = tmp;

		GET_NEXT(tmp);
		user = tmp;

		GET_NEXT(tmp);
		friend = url_decode(tmp);

		serv_got_alias(gc, user, friend);

		if (!g_strcasecmp(state, "BSY")) {
			status |= UC_UNAVAILABLE | (MSN_BUSY << 1);
		} else if (!g_strcasecmp(state, "IDL")) {
			status |= UC_UNAVAILABLE | (MSN_IDLE << 1);
		} else if (!g_strcasecmp(state, "BRB")) {
			status |= UC_UNAVAILABLE | (MSN_BRB << 1);
		} else if (!g_strcasecmp(state, "AWY")) {
			status |= UC_UNAVAILABLE | (MSN_AWAY << 1);
		} else if (!g_strcasecmp(state, "PHN")) {
			status |= UC_UNAVAILABLE | (MSN_PHONE << 1);
		} else if (!g_strcasecmp(state, "LUN")) {
			status |= UC_UNAVAILABLE | (MSN_LUNCH << 1);
		}

		serv_got_update(gc, user, 1, 0, 0, 0, status, 0);
	} else if (!g_strncasecmp(buf, "LST", 3)) {
		char *which, *who, *friend, *tmp = buf;
		struct msn_add_permit *ap; /* for any as yet undealt with buddies who've added you to their buddy list when you were off-line.  How dare they! */
		GSList *perm = gc->user->permit; /* current permit list */
		GSList *denyl = gc->user->deny;
		char msg[MSN_BUF_LEN];
		int new = 1;
		int pos, tot;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		which = tmp;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		pos = strtol(tmp, NULL, 10);
		GET_NEXT(tmp);
		tot = strtol(tmp, NULL, 10);
		GET_NEXT(tmp);
		who = tmp;

		GET_NEXT(tmp);
		friend = url_decode(tmp);

		if (!g_strcasecmp(which, "FL") && pos) {
			struct msn_buddy *b = g_new0(struct msn_buddy, 1);
			b->user = g_strdup(who);
			b->friend = g_strdup(friend);
			md->fl = g_slist_append(md->fl, b);
		} else if (!g_strcasecmp(which, "AL") && pos) {
			if (g_slist_find_custom(gc->user->deny, who,
							(GCompareFunc)strcmp)) {
				debug_printf("moving from deny to permit: %s", who);
				gaim_privacy_deny_remove(gc->user, who);
			}
			gaim_privacy_permit_add(gc->user, who);
		} else if (!g_strcasecmp(which, "BL") && pos) {
			gaim_privacy_deny_add(gc->user, who);
		} else if (!g_strcasecmp(which, "RL")) {
		    if (pos) {
			while(perm) {
				if(!g_strcasecmp(perm->data, who))
					new = 0;
				perm = perm->next;
			}
			while(denyl) {
			  if(!g_strcasecmp(denyl->data, who))
			    new = 0;
			  denyl = denyl->next;
			}
			if(new) {
				debug_printf("Unresolved MSN RL entry\n");
				ap = g_new0(struct msn_add_permit, 1);
				ap->user = g_strdup(who);
				ap->friend = g_strdup(friend);
				ap->gc = gc;
                         
				g_snprintf(msg, sizeof(msg), _("The user %s (%s) wants to add you to their buddy list"),ap->user, ap->friend);
				do_ask_dialog(msg, NULL, ap, _("Authorize"), msn_accept_add, _("Deny"), msn_cancel_add, my_protocol->plug ? my_protocol->plug->handle : NULL, FALSE);
			}
		    }
			
			if (pos != tot) 
				return 1; /* this isn't the last one in the RL, so return. */

			g_snprintf(sendbuf, sizeof(sendbuf), "CHG %u NLN\r\n", ++md->trId);
			if (msn_write(md->fd, sendbuf, strlen(sendbuf)) < 0) {
				hide_login_progress(gc, _("Unable to write"));
				signoff(gc);
				return 0;
			}

			account_online(gc);
			serv_finish_login(gc);

			md->permit = g_slist_copy(gc->user->permit);
			md->deny = g_slist_copy(gc->user->deny);

			while (md->fl) {
				struct msn_buddy *mb = md->fl->data;
				struct buddy *b = find_buddy(gc->user, mb->user);
				md->fl = g_slist_remove(md->fl, mb);
				if(!b)
					b = add_buddy(gc->user, _("Buddies"), mb->user, NULL);
				serv_got_alias(gc, mb->user, mb->friend);
				g_free(mb->user);
				g_free(mb->friend);
				g_free(mb);
			}
		}
	} else if (!g_strncasecmp(buf, "MSG", 3)) {
		char *user, *tmp = buf;
		int length;

		GET_NEXT(tmp);
		user = tmp;

		GET_NEXT(tmp);

		GET_NEXT(tmp);
		length = atoi(tmp);

		md->msg = TRUE;
		md->msguser = g_strdup(user);
		md->msglen = length;
	} else if (!g_strncasecmp(buf, "NLN", 3)) {
		char *state, *user, *friend, *tmp = buf;
		int status = 0;

		GET_NEXT(tmp);
		state = tmp;

		GET_NEXT(tmp);
		user = tmp;

		GET_NEXT(tmp);
		friend = url_decode(tmp);

		serv_got_alias(gc, user, friend);

		if (!g_strcasecmp(state, "BSY")) {
			status |= UC_UNAVAILABLE | (MSN_BUSY << 1);
		} else if (!g_strcasecmp(state, "IDL")) {
			status |= UC_UNAVAILABLE | (MSN_IDLE << 1);
		} else if (!g_strcasecmp(state, "BRB")) {
			status |= UC_UNAVAILABLE | (MSN_BRB << 1);
		} else if (!g_strcasecmp(state, "AWY")) {
			status |= UC_UNAVAILABLE | (MSN_AWAY << 1);
		} else if (!g_strcasecmp(state, "PHN")) {
			status |= UC_UNAVAILABLE | (MSN_PHONE << 1);
		} else if (!g_strcasecmp(state, "LUN")) {
			status |= UC_UNAVAILABLE | (MSN_LUNCH << 1);
		}

		serv_got_update(gc, user, 1, 0, 0, 0, status, 0);
	} else if (!g_strncasecmp(buf, "OUT", 3)) {
		char *tmp = buf;

		GET_NEXT(tmp);
		if (!g_strncasecmp(tmp, "OTH", 3)) {
			hide_login_progress(gc, _("You have been disconnected. You have "
						  "signed on from another location."));
			signoff(gc);
			return 0;
		}
	} else if (!g_strncasecmp(buf, "PRP", 3)) {
	} else if (!g_strncasecmp(buf, "QNG", 3)) {
	} else if (!g_strncasecmp(buf, "QRY", 3)) {
	} else if (!g_strncasecmp(buf, "REA", 3)) {
		char *friend, *tmp = buf;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		GET_NEXT(tmp);
		GET_NEXT(tmp);

		friend = url_decode(tmp);

		g_snprintf(gc->displayname, sizeof(gc->displayname), "%s", friend);
	} else if (!g_strncasecmp(buf, "REM", 3)) {
	} else if (!g_strncasecmp(buf, "RNG", 3)) {
		struct msn_switchboard *ms;
		char *sessid, *ssaddr, *auth, *user;
		int port, i = 0;
		char *tmp = buf;

		GET_NEXT(tmp);
		sessid = tmp;

		GET_NEXT(tmp);
		ssaddr = tmp;

		GET_NEXT(tmp);

		GET_NEXT(tmp);
		auth = tmp;

		GET_NEXT(tmp);
		user = tmp;
		GET_NEXT(tmp);

		while (ssaddr[i] && ssaddr[i] != ':') i++;
		if (ssaddr[i] == ':') {
			char *x = &ssaddr[i + 1];
			ssaddr[i] = 0;
			port = atoi(x);
		} else
			port = 1863;

		ms = g_new0(struct msn_switchboard, 1);
		if (proxy_connect(ssaddr, port, msn_rng_connect, ms) != 0) {
			g_free(ms);
			return 1;
		}
		ms->user = g_strdup(user);
		ms->sessid = g_strdup(sessid);
		ms->auth = g_strdup(auth);
		ms->gc = gc;
	} else if (!g_strncasecmp(buf, "URL", 3)) {
		char *tmp = buf;
		FILE *fd;
		md5_state_t st;
		md5_byte_t di[16];
		int i;
		char buf2[64];
		char sendbuf[64];
		char hippy[2048];
		char *rru;
		char *passport;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		rru = tmp;
		GET_NEXT(tmp);
		passport = tmp;
		
		g_snprintf(hippy, sizeof(hippy), "%s%lu%s", md->mspauth, time(NULL) - md->sl, gc->password);

		md5_init(&st);
		md5_append(&st, (const md5_byte_t *)hippy, strlen(hippy));
		md5_finish(&st, di);

		bzero(sendbuf, sizeof(sendbuf));
		for (i = 0; i < 16; i++) {
			g_snprintf(buf2, sizeof(buf2), "%02x", di[i]);
			strcat(sendbuf, buf2);
		}

		if (md->passport) {
			unlink(md->passport);
			g_free(md->passport);
		}

		if( (fd = gaim_mkstemp(&(md->passport))) == NULL ) {
		  debug_printf("Error opening temp file: %s\n", strerror(errno)); 
		}
		else {
			fputs("<html>\n"
				"<head>\n"
				"<noscript>\n"
				"<meta http-equiv=Refresh content=\"0; url=http://www.hotmail.com\">\n"
				"</noscript>\n"
				"</head>\n\n", fd);
		
		        fprintf(fd, "<body onload=\"document.pform.submit(); \">\n");
		        fprintf(fd, "<form name=\"pform\" action=\"%s\" method=\"POST\">\n\n", passport);
		        fprintf(fd, "<input type=\"hidden\" name=\"mode\" value=\"ttl\">\n");
		        fprintf(fd, "<input type=\"hidden\" name=\"login\" value=\"%s\">\n", gc->username);
		        fprintf(fd, "<input type=\"hidden\" name=\"username\" value=\"%s\">\n", gc->username);
			fprintf(fd, "<input type=\"hidden\" name=\"sid\" value=\"%s\">\n", md->sid);
			fprintf(fd, "<input type=\"hidden\" name=\"kv\" value=\"%s\">\n", md->kv);
			fprintf(fd, "<input type=\"hidden\" name=\"id\" value=\"2\">\n");
			fprintf(fd, "<input type=\"hidden\" name=\"sl\" value=\"%ld\">\n", time(NULL) - md->sl);
			fprintf(fd, "<input type=\"hidden\" name=\"rru\" value=\"%s\">\n", rru);
			fprintf(fd, "<input type=\"hidden\" name=\"auth\" value=\"%s\">\n", md->mspauth);
			fprintf(fd, "<input type=\"hidden\" name=\"creds\" value=\"%s\">\n", sendbuf); // Digest me
			fprintf(fd, "<input type=\"hidden\" name=\"svc\" value=\"mail\">\n");
			fprintf(fd, "<input type=\"hidden\" name=\"js\" value=\"yes\">\n");
			fprintf(fd, "</form></body>\n");
			fprintf(fd, "</html>\n");
			if (fclose(fd)) {
				debug_printf("Error closing temp file: %s\n", strerror(errno)); 
				unlink(md->passport);
				g_free(md->passport);
			}
		}
	} else if (!g_strncasecmp(buf, "SYN", 3)) {
	} else if (!g_strncasecmp(buf, "USR", 3)) {
	} else if (!g_strncasecmp(buf, "XFR", 3)) {
		char *host = strstr(buf, "SB");
		int port;
		int i = 0;
		gboolean switchboard = TRUE;
		char *tmp;

		if (!host) {
			host = strstr(buf, "NS");
			if (!host) {
				hide_login_progress(gc, _("Got invalid XFR\n"));
				signoff(gc);
				return 0;
			}
			switchboard = FALSE;
		}

		GET_NEXT(host);
		while (host[i] && host[i] != ':') i++;
		if (host[i] == ':') {
			tmp = &host[i + 1];
			host[i] = 0;
			while (isdigit(*tmp)) tmp++;
			*tmp++ = 0;
			port = atoi(&host[i + 1]);
		} else {
			port = 1863;
			tmp = host;
			GET_NEXT(tmp);
		}

		if (switchboard) {
			struct msn_switchboard *ms = msn_find_writable_switch(gc);
			if (!ms)
				return 1;

			GET_NEXT(tmp);

			if (proxy_connect(host, port, msn_ss_xfr_connect, ms) != 0) {
				msn_kill_switch(ms);
				return 1;
			}
			ms->auth = g_strdup(tmp);
		} else {
			close(md->fd);
			gaim_input_remove(md->inpa);
			md->inpa = 0;
			if (proxy_connect(host, port, msn_login_xfr_connect, gc) != 0) {
				hide_login_progress(gc, _("Error transfering"));
				signoff(gc);
				return 0;
			}
		}
	} else if (isdigit(*buf)) {
		handle_errcode(buf, TRUE);
	} else {
		debug_printf("Unhandled message!\n");
	}

	return 1;
}

static void msn_process_main_msg(struct gaim_connection *gc, char *msg)
{
	struct msn_data *md = gc->proto_data;
	char *skiphead;
	char *content;

	content = strstr(msg, "Content-Type: ");

	if ((content) && (!g_strncasecmp(content, "Content-Type: text/x-msmsgsprofile",
				strlen("Content-Type: text/x-msmsgsprofile")))) {

		char *kv,*sid,*mspauth;

		kv = strstr(msg, "kv: ");
		sid = strstr(msg, "sid: ");
		mspauth = strstr(msg, "MSPAuth: ");

		if (kv) {
			char *tmp;

			kv += strlen("kv: ");
			tmp = strstr(kv, "\r\n"); *tmp = 0;
			md->kv = g_strdup(kv);
		}

		if (sid) {
			char *tmp;

			sid += strlen("sid: ");
			tmp = strstr(sid, "\r\n"); *tmp = 0;
			md->sid = g_strdup(sid);
		}

		if (mspauth) {
			char *tmp;

			mspauth += strlen("MSPAuth: ");
			tmp = strstr(mspauth, "\r\n"); *tmp = 0;
			md->mspauth = g_strdup(mspauth);
		}

	}


	if (!g_strcasecmp(md->msguser, "hotmail")) {
		handle_hotmail(gc, msg);
		return;
	}


	skiphead = strstr(msg, "\r\n\r\n");
	if (!skiphead || !skiphead[4])
		return;
	skiphead += 4;
	strip_linefeed(skiphead);

	serv_got_im(gc, md->msguser, skiphead, 0, time(NULL), -1);
}

static void msn_callback(gpointer data, gint source, GaimInputCondition cond)
{
	struct gaim_connection *gc = data;
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];
	int cont = 1;
	int len;

	len = read(md->fd, buf, sizeof(buf));
	if (len <= 0) {
		hide_login_progress_error(gc, _("Error reading from server"));
		signoff(gc);
		return;
	}

	md->rxqueue = g_realloc(md->rxqueue, len + md->rxlen);
	memcpy(md->rxqueue + md->rxlen, buf, len);
	md->rxlen += len;

	while (cont) {
		if (!md->rxlen)
			return;

		if (md->msg) {
			char *msg;
			if (md->msglen > md->rxlen)
				return;
			msg = md->rxqueue;
			md->rxlen -= md->msglen;
			if (md->rxlen) {
				md->rxqueue = g_memdup(msg + md->msglen, md->rxlen);
			} else {
				md->rxqueue = NULL;
				msg = g_realloc(msg, md->msglen + 1);
			}
			msg[md->msglen] = 0;
			md->msglen = 0;
			md->msg = FALSE;

			msn_process_main_msg(gc, msg);

			g_free(md->msguser);
			g_free(msg);
		} else {
			char *end = md->rxqueue;
			int cmdlen;
			char *cmd;
			int i = 0;

			while (i + 1 < md->rxlen) {
				if (*end == '\r' && end[1] == '\n')
					break;
				end++; i++;
			}
			if (i + 1 == md->rxlen)
				return;

			cmdlen = end - md->rxqueue + 2;
			cmd = md->rxqueue;
			md->rxlen -= cmdlen;
			if (md->rxlen) {
				md->rxqueue = g_memdup(cmd + cmdlen, md->rxlen);
			} else {
				md->rxqueue = NULL;
				cmd = g_realloc(cmd, cmdlen + 1);
			}
			cmd[cmdlen] = 0;

			debug_printf("MSN S: %s", cmd);
			g_strchomp(cmd);
			cont = msn_process_main(gc, cmd);

			g_free(cmd);
		}
	}
}

static void msn_login_xfr_connect(gpointer data, gint source, GaimInputCondition cond)
{
	struct gaim_connection *gc = data;
	struct msn_data *md;
	char buf[MSN_BUF_LEN];

	if (!g_slist_find(connections, gc)) {
		close(source);
		return;
	}

	md = gc->proto_data;

	if (md->fd != source)
		md->fd = source;

	if (md->fd == -1) {
		hide_login_progress(gc, _("Unable to connect to Notification Server"));
		signoff(gc);
		return;
	}

	g_snprintf(buf, sizeof(buf), "VER %u MSNP5\r\n", ++md->trId);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Unable to talk to Notification Server"));
		signoff(gc);
		return;
	}

	md->inpa = gaim_input_add(md->fd, GAIM_INPUT_READ, msn_login_callback, gc);
}

static int msn_process_login(struct gaim_connection *gc, char *buf)
{
	struct msn_data *md = gc->proto_data;
	char sendbuf[MSN_BUF_LEN];

	if (!g_strncasecmp(buf, "VER", 3)) {
		/* we got VER, check to see that MSNP5 is in the list, then send INF */
		if (!strstr(buf, "MSNP5")) {
			hide_login_progress(gc, _("Protocol not supported"));
			signoff(gc);
			return 0;
		}

		g_snprintf(sendbuf, sizeof(sendbuf), "INF %u\r\n", ++md->trId);
		if (msn_write(md->fd, sendbuf, strlen(sendbuf)) < 0) {
			hide_login_progress(gc, _("Unable to request INF\n"));
			signoff(gc);
			return 0;
		}
	} else if (!g_strncasecmp(buf, "INF", 3)) {
		/* check to make sure we can use md5 */
		if (!strstr(buf, "MD5")) {
			hide_login_progress(gc, _("Unable to login using MD5"));
			signoff(gc);
			return 0;
		}

		g_snprintf(sendbuf, sizeof(sendbuf), "USR %u MD5 I %s\r\n", ++md->trId, gc->username);
		if (msn_write(md->fd, sendbuf, strlen(sendbuf)) < 0) {
			hide_login_progress(gc, _("Unable to send USR\n"));
			signoff(gc);
			return 0;
		}

		set_login_progress(gc, 3, _("Requesting to send password"));
	} else if (!g_strncasecmp(buf, "USR", 3)) {
		char *resp, *friend, *tmp = buf;

		GET_NEXT(tmp);
		GET_NEXT(tmp);
		resp = tmp;
		GET_NEXT(tmp);
		GET_NEXT(tmp);
		friend = url_decode(tmp);
		GET_NEXT(tmp);

		/* so here, we're either getting the challenge or the OK */
		if (!g_strcasecmp(resp, "OK")) {
			g_snprintf(gc->displayname, sizeof(gc->displayname), "%s", friend);

			g_snprintf(sendbuf, sizeof(sendbuf), "SYN %u 0\r\n", ++md->trId);
			if (msn_write(md->fd, sendbuf, strlen(sendbuf)) < 0) {
				hide_login_progress(gc, _("Unable to write"));
				signoff(gc);
				return 0;
			}

			gaim_input_remove(md->inpa);
			md->inpa = gaim_input_add(md->fd, GAIM_INPUT_READ, msn_callback, gc);
			return 0;
		} else if (!g_strcasecmp(resp, "MD5")) {
			char buf2[MSN_BUF_LEN];
			md5_state_t st;
			md5_byte_t di[16];
			int i;

			g_snprintf(buf2, sizeof(buf2), "%s%s", friend, gc->password);

			md5_init(&st);
			md5_append(&st, (const md5_byte_t *)buf2, strlen(buf2));
			md5_finish(&st, di);

			g_snprintf(sendbuf, sizeof(sendbuf), "USR %u MD5 S ", ++md->trId);
			for (i = 0; i < 16; i++) {
				g_snprintf(buf2, sizeof(buf2), "%02x", di[i]);
				strcat(sendbuf, buf2);
			}
			strcat(sendbuf, "\r\n");

			if (msn_write(md->fd, sendbuf, strlen(sendbuf)) < 0) {
				hide_login_progress(gc, _("Unable to send password"));
				signoff(gc);
				return 0;
			}

			set_login_progress(gc, 4, _("Password sent"));
		}
	} else if (!g_strncasecmp(buf, "XFR", 3)) {
		char *host = strstr(buf, "NS");
		int port;
		int i = 0;

		if (!host) {
			hide_login_progress(gc, _("Got invalid XFR\n"));
			signoff(gc);
			return 0;
		}

		GET_NEXT(host);
		while (host[i] && host[i] != ':') i++;
		if (host[i] == ':') {
			char *x = &host[i + 1];
			host[i] = 0;
			port = atoi(x);
		} else
			port = 1863;

		close(md->fd);
		gaim_input_remove(md->inpa);
		md->inpa = 0;
		md->fd = 0;
		md->sl = time(NULL);
		if (proxy_connect(host, port, msn_login_xfr_connect, gc) != 0) {
			hide_login_progress(gc, _("Unable to transfer"));
			signoff(gc);
		}
		return 0;
	} else {
		if (isdigit(*buf))
			hide_login_progress(gc, handle_errcode(buf, FALSE));
		else
			hide_login_progress(gc, _("Unable to parse message"));
		signoff(gc);
		return 0;
	}

	return 1;
}

static void msn_login_callback(gpointer data, gint source, GaimInputCondition cond)
{
	struct gaim_connection *gc = data;
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];
	int cont = 1;
	int len;

	len = read(md->fd, buf, sizeof(buf));
	if (len <= 0) {
		hide_login_progress(gc, _("Error reading from server"));
		signoff(gc);
		return;
	}

	md->rxqueue = g_realloc(md->rxqueue, len + md->rxlen);
	memcpy(md->rxqueue + md->rxlen, buf, len);
	md->rxlen += len;

	while (cont) {
		char *end = md->rxqueue;
		int cmdlen;
		char *cmd;
		int i = 0;

		if (!md->rxlen)
			return;

		while (i + 1 < md->rxlen) {
			if (*end == '\r' && end[1] == '\n')
				break;
			end++; i++;
		}
		if (i + 1 == md->rxlen)
			return;

		cmdlen = end - md->rxqueue + 2;
		cmd = md->rxqueue;
		md->rxlen -= cmdlen;
		if (md->rxlen) {
			md->rxqueue = g_memdup(cmd + cmdlen, md->rxlen);
		} else {
			md->rxqueue = NULL;
			cmd = g_realloc(cmd, cmdlen + 1);
		}
		cmd[cmdlen] = 0;

		debug_printf("MSN S: %s", cmd);
		g_strchomp(cmd);
		cont = msn_process_login(gc, cmd);

		g_free(cmd);
	}
}

static void msn_login_connect(gpointer data, gint source, GaimInputCondition cond)
{
	struct gaim_connection *gc = data;
	struct msn_data *md;
	char buf[1024];

	if (!g_slist_find(connections, gc)) {
		close(source);
		return;
	}

	md = gc->proto_data;

	if (md->fd != source)
		md->fd = source;

	if (md->fd == -1) {
		hide_login_progress(gc, _("Unable to connect"));
		signoff(gc);
		return;
	}

	g_snprintf(buf, sizeof(buf), "VER %u MSNP5\r\n", ++md->trId);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Unable to write to server"));
		signoff(gc);
		return;
	}

	md->inpa = gaim_input_add(md->fd, GAIM_INPUT_READ, msn_login_callback, gc);
	set_login_progress(gc, 2,_("Synching with server"));
}

static void msn_login(struct aim_user *user)
{
	struct gaim_connection *gc = new_gaim_conn(user);
	struct msn_data *md = gc->proto_data = g_new0(struct msn_data, 1);

	set_login_progress(gc, 1, _("Connecting"));

	g_snprintf(gc->username, sizeof(gc->username), "%s", msn_normalize(gc->username));
	
	if (proxy_connect(user->proto_opt[USEROPT_MSNSERVER][0] ? user->proto_opt[USEROPT_MSNSERVER] : MSN_SERVER, 
			       user->proto_opt[USEROPT_MSNPORT][0] ? atoi(user->proto_opt[USEROPT_MSNPORT]) : MSN_PORT,
			       msn_login_connect, gc) != 0) {
		hide_login_progress(gc, _("Unable to connect"));
		signoff(gc);
	}
}

static void msn_close(struct gaim_connection *gc)
{
	struct msn_data *md = gc->proto_data;
	close(md->fd);
	if (md->inpa)
		gaim_input_remove(md->inpa);
	g_free(md->rxqueue);
	if (md->msg)
		g_free(md->msguser);
	if (md->passport) {
		unlink(md->passport);
      		g_free(md->passport);
	}
	while (md->switches)
		msn_kill_switch(md->switches->data);
	while (md->fl) {
		struct msn_buddy *tmp = md->fl->data;
		md->fl = g_slist_remove(md->fl, tmp);
		g_free(tmp->user);
		g_free(tmp->friend);
		g_free(tmp);
	}
	g_slist_free(md->permit);
	g_slist_free(md->deny);
	g_free(md);
}

static int msn_send_typing(struct gaim_connection *gc, char *who, int typing) {
	struct msn_switchboard *ms = msn_find_switch(gc, who);
	char header[MSN_BUF_LEN] =   "MIME-Version: 1.0\r\n"
				     "Content-Type: text/x-msmsgscontrol\r\n" 
				     "TypingUser: ";
	char buf [MSN_BUF_LEN];
	if (!ms || !typing)
		return 0;
	g_snprintf(buf, sizeof(buf), "MSG %u N %d\r\n%s%s\r\n\r\n\r\n",
		   ++ms->trId,
		   strlen(header) + strlen("\r\n\r\n\r\n") + strlen(gc->username),
		   header, gc->username);
	if (msn_write(ms->fd, buf, strlen(buf)) < 0)
	           msn_kill_switch(ms);
	return MSN_TYPING_SEND_TIMEOUT;
}

/* XXX Don't blame me. I stole this from the oscar module! */
static struct msn_file_transfer *find_mft_by_xfer(struct gaim_connection *gc,
												  struct file_transfer *xfer)
{
	GSList *g = ((struct msn_data *)gc->proto_data)->file_transfers;
	struct msn_file_transfer *f = NULL;

	while (g) {
		f = (struct msn_file_transfer *)g->data;
		if (f->xfer == xfer)
			break;

		g = g->next;
		f = NULL;
	}

	return f;
}

/* XXX Don't blame me. I stole this from the oscar module! */
static struct msn_file_transfer *find_mft_by_cookie(struct gaim_connection *gc,
													unsigned long cookie)
{
	GSList *g = ((struct msn_data *)gc->proto_data)->file_transfers;
	struct msn_file_transfer *f = NULL;

	while (g) {
		f = (struct msn_file_transfer *)g->data;
		if (f->cookie == cookie)
			break;

		g = g->next;
		f = NULL;
	}

	return f;
}

static void msn_file_transfer_cancel(struct gaim_connection *gc,
									 struct file_transfer *xfer)
{
	struct msn_data *md = gc->proto_data;
	struct msn_file_transfer *mft = find_mft_by_xfer(gc, xfer);
	struct msn_switchboard *ms = msn_find_switch(gc, mft->sn);
	char header[MSN_BUF_LEN];
	char buf[MSN_BUF_LEN];

	if (!ms || !mft)
	{
		debug_printf("Eep! Returning from msn_file_transfer_cancel early");
		return;
	}

	g_snprintf(header, sizeof(header),
			   "MIME-Version: 1.0\r\n"
			   "Content-Type: text/x-msmsgsinvite; charset=UTF-8\r\n\r\n"
			   "Invitation-Command: CANCEL\r\n"
			   "Invitation-Cookie: %lu\r\n"
			   "Cancel-Code: REJECT\r\n",
			   (unsigned long)mft->cookie);

	g_snprintf(buf, sizeof(buf), "MSG %u N %d\r\n%s\r\n\r\n",
			   ++ms->trId, strlen(header) + strlen("\r\n\r\n"),
			   header);

	md->file_transfers = g_slist_remove(md->file_transfers, mft);

	if (msn_write(ms->fd, buf, strlen(buf)) < 0)
	{
		debug_printf("Uh oh! Killing switch.\n");
		msn_kill_switch(ms);
	}
}

static void msn_file_transfer_in(struct gaim_connection *gc,
								 struct file_transfer *xfer, int offset)
{
	struct msn_file_transfer *mft = find_mft_by_xfer(gc, xfer);
	struct msn_switchboard *ms = msn_find_switch(gc, mft->sn);
	char header[MSN_BUF_LEN];
	char buf[MSN_BUF_LEN];

	if (!ms || !mft)
	{
		debug_printf("Eep! Returning from msn_file_transfer_in early");
		return;
	}

	g_snprintf(header, sizeof(header),
			   "MIME-Version: 1.0\r\n"
			   "Content-Type: text/x-msmsgsinvite; charset=UTF-8\r\n\r\n"
			   "Invitation-Command: ACCEPT\r\n"
			   "Invitation-Cookie: %lu\r\n"
			   "Launch-Application: FALSE\r\n"
			   "Request-Data: IP-Address:\r\n",
			   (unsigned long)mft->cookie);

	g_snprintf(buf, sizeof(buf), "MSG %u N %d\r\n%s\r\n\r\n",
			   ++ms->trId, strlen(header) + strlen("\r\n\r\n"),
			   header);

	if (msn_write(ms->fd, buf, strlen(buf)) < 0) {
		msn_kill_switch(ms);
		return;
	}

	mft->xfer = xfer;
}

static void msn_file_transfer_out(struct gaim_connection *gc,
								  struct file_transfer *xfer,
								  const char *name, int totfiles, int totsize)
{
	struct msn_file_transfer *mft = find_mft_by_xfer(gc, xfer);
	struct msn_switchboard *ms = msn_find_switch(gc, mft->sn);
	char header[MSN_BUF_LEN];
	char buf[MSN_BUF_LEN];
	struct stat sb;

	if (!ms)
		return;

	if (totfiles > 1)
		return;

	if (stat(name, &sb) == -1)
		return;

	mft->cookie = 1 + (uint32_t)(4294967295.0 * rand() / (RAND_MAX + 1.0));

	g_snprintf(header, sizeof(header),
		"MIME-Version: 1.0\r\n"
		"Content-Type: text/x-msmsgsinvite; charset=UTF-8\r\n"
		"Application-Name: File Transfer\r\n"
		"Application-GUID: {5D3E02AB-6190-11d3-BBBB-00C04F795683}\r\n"
		"Invitation-Command: INVITE\r\n"
		"Invitation-Cookie: %lu\r\n"
		"Application-File: %s\r\n"
		"Application-FileSize: %ld\r\n",
		(unsigned long)mft->cookie, name, sb.st_size);

	g_snprintf(buf, sizeof(buf), "MSG %u A %d\r\n%s\r\n\r\n",
			   ++ms->trId,
			   strlen(header) + strlen("\r\n\r\n"),
			   header);

	if (msn_write(ms->fd, buf, strlen(buf)) < 0)
		msn_kill_switch(ms);

	debug_printf("\n");
}

static void msn_file_transfer_done(struct gaim_connection *gc,
								   struct file_transfer *xfer)
{
	struct msn_data *md = (struct msn_data *)gc->proto_data;
	struct msn_file_transfer *mft = find_mft_by_xfer(gc, xfer);
	char buf[MSN_BUF_LEN];

	g_snprintf(buf, sizeof(buf), "BYE 16777989\r\n");

	msn_write(mft->fd, buf, strlen(buf));

	md->file_transfers = g_slist_remove(md->file_transfers, mft);

	gaim_input_remove(mft->inpa);

	close(mft->fd);

	g_free(mft->filename);
	g_free(mft->sn);
	g_free(mft);
}

static size_t msn_file_transfer_read(struct gaim_connection *gc,
									 struct file_transfer *xfer, int fd,
									 char **buf)
{
	unsigned char header[3];
	size_t len, size;

	if (read(fd, header, sizeof(header)) < 3)
		return 0;

	if (header[0] != 0) {
		debug_printf("Invalid header[0]: %d. Aborting.\n", header[0]);
		return 0;
	}

	size = header[1] | (header[2] << 8);

	*buf = g_new0(char, size);

	for (len = 0; len < size; len += read(fd, *buf + len, size - len));

	return len;
}

static int msn_send_im(struct gaim_connection *gc, char *who, char *message, int len, int flags)
{
	struct msn_data *md = gc->proto_data;
	struct msn_switchboard *ms = msn_find_switch(gc, who);
	char buf[MSN_BUF_LEN];

	if (ms) {
		char *send;

		if (ms->txqueue) {
			debug_printf("appending to queue\n");
			ms->txqueue = g_slist_append(ms->txqueue, g_strdup(message));
			return 1;
		}

		send = add_cr(message);
		g_snprintf(buf, sizeof(buf), "MSG %u N %d\r\n%s%s", ++ms->trId,
				strlen(MIME_HEADER) + strlen(send),
				MIME_HEADER, send);
		g_free(send);
		if (msn_write(ms->fd, buf, strlen(buf)) < 0)
			msn_kill_switch(ms);
		debug_printf("\n");
	} else if (strcmp(who, gc->username)) {
		g_snprintf(buf, MSN_BUF_LEN, "XFR %u SB\r\n", ++md->trId);
		if (msn_write(md->fd, buf, strlen(buf)) < 0) {
			hide_login_progress(gc, _("Write error"));
			signoff(gc);
			return 1;
		}

		ms = g_new0(struct msn_switchboard, 1);
		md->switches = g_slist_append(md->switches, ms);
		ms->user = g_strdup(who);
		ms->txqueue = g_slist_append(ms->txqueue, g_strdup(message));
		ms->gc = gc;
		ms->fd = -1;
	} else
		/* in msn you can't send messages to yourself, so we'll fake like we received it ;) */
		serv_got_im(gc, who, message, flags | IM_FLAG_GAIMUSER, time(NULL), -1);
	return 1;
}

static int msn_chat_send(struct gaim_connection *gc, int id, char *message)
{
	struct msn_switchboard *ms = msn_find_switch_by_id(gc, id);
	char buf[MSN_BUF_LEN];
	char *send;

	if (!ms)
		return -EINVAL;

	send = add_cr(message);
	g_snprintf(buf, sizeof(buf), "MSG %u N %d\r\n%s%s", ++ms->trId,
			strlen(MIME_HEADER) + strlen(send),
			MIME_HEADER, send);
	g_free(send);
	if (msn_write(ms->fd, buf, strlen(buf)) < 0) {
		msn_kill_switch(ms);
		return 0;
	}
	debug_printf("\n");
	serv_got_chat_in(gc, id, gc->username, 0, message, time(NULL));
	return 0;
}

static void msn_chat_invite(struct gaim_connection *gc, int id, const char *msg, const char *who)
{
	struct msn_switchboard *ms = msn_find_switch_by_id(gc, id);
	char buf[MSN_BUF_LEN];

	if (!ms)
		return;

	g_snprintf(buf, sizeof(buf), "CAL %u %s\r\n", ++ms->trId, who);
	if (msn_write(ms->fd, buf, strlen(buf)) < 0)
		msn_kill_switch(ms);
}

static void msn_chat_leave(struct gaim_connection *gc, int id)
{
	struct msn_switchboard *ms = msn_find_switch_by_id(gc, id);
	char buf[MSN_BUF_LEN];

	if (!ms)
		return;

	g_snprintf(buf, sizeof(buf), "OUT\r\n");
	if (msn_write(ms->fd, buf, strlen(buf)) < 0)
		msn_kill_switch(ms);
}

static GList *msn_away_states(struct gaim_connection *gc)
{
	GList *m = NULL;

	m = g_list_append(m, _("Available"));
	m = g_list_append(m, _("Away From Computer"));
	m = g_list_append(m, _("Be Right Back"));
	m = g_list_append(m, _("Busy"));
	m = g_list_append(m, _("On The Phone"));
	m = g_list_append(m, _("Out To Lunch"));
	m = g_list_append(m, _("Hidden"));

	return m;
}

static void msn_set_away(struct gaim_connection *gc, char *state, char *msg)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];
	const char *away;

	if (gc->away) {
		g_free(gc->away);
		gc->away = NULL;
	}

	if (msg) {
		gc->away = g_strdup("");
		away = "AWY";
	} else if (state) {
		gc->away = g_strdup("");

		if (!strcmp(state, _("Away From Computer")))
			away = "AWY";
		else if (!strcmp(state, _("Be Right Back")))
			away = "BRB";
		else if (!strcmp(state, _("Busy")))
			away = "BSY";
		else if (!strcmp(state, _("On The Phone")))
			away = "PHN";
		else if (!strcmp(state, _("Out To Lunch")))
			away = "LUN";
		else if (!strcmp(state, _("Hidden")))
			away = "HDN";
		else {
			g_free(gc->away);
			gc->away = NULL;
			away = "NLN";
		}
	} else if (gc->is_idle)
		away = "IDL";
	else
		away = "NLN";

	g_snprintf(buf, sizeof(buf), "CHG %u %s\r\n", ++md->trId, away);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_set_idle(struct gaim_connection *gc, int idle)
{
	struct msn_data *md = gc->proto_data;
	char buf[64];

	if (gc->away)
		return;
	g_snprintf(buf, sizeof(buf),
		idle ? "CHG %d IDL\r\n" : "CHG %u NLN\r\n", ++md->trId);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static char **msn_list_icon(int uc)
{
	if (uc == 0)
		return msn_online_xpm;
	
	uc >>= 1;
	
	if (uc == 2 || uc == 6)
		return msn_occ_xpm;
	
	return msn_away_xpm;
}

static char *msn_get_away_text(int s)
{
	switch (s) {
		case MSN_BUSY :
			return _("Busy");
		case MSN_BRB :
			return _("Be right back");
		case MSN_AWAY :
			return _("Away from the computer");
		case MSN_PHONE :
			return _("On the phone");
		case MSN_LUNCH :
			return _("Out to lunch");
		case MSN_IDLE :
			return _("Idle");
		default:
			return _("Available");
	}
}

static void msn_ask_send_file(struct gaim_connection *gc, char *destsn)
{
	struct msn_data *md = (struct msn_data *)gc->proto_data;
	struct msn_file_transfer *mft = g_new0(struct msn_file_transfer, 1);

	mft->type = MFT_SENDFILE_OUT;
	mft->sn = g_strdup(destsn);
	mft->gc = gc;

	md->file_transfers = g_slist_append(md->file_transfers, mft);

	mft->xfer = transfer_out_add(gc, mft->sn);
}

static GList *msn_buddy_menu(struct gaim_connection *gc, char *who)
{
	GList *m = NULL;
	struct proto_buddy_menu *pbm;
	struct buddy *b = find_buddy(gc->user, who);
	static char buf[MSN_BUF_LEN];

	pbm = g_new0(struct proto_buddy_menu, 1);
	pbm->label = _("Send File");
	pbm->callback = msn_ask_send_file;
	pbm->gc = gc;
	m = g_list_append(m, pbm);

	if (!b || !(b->uc >> 1))
		return m;

	pbm = g_new0(struct proto_buddy_menu, 1);
	g_snprintf(buf, sizeof(buf), _("Status: %s"), msn_get_away_text(b->uc >> 1));
	pbm->label = buf;
	pbm->callback = NULL;
	pbm->gc = gc;
	m = g_list_append(m, pbm);

	return m;
}

static void msn_add_buddy(struct gaim_connection *gc, const char *name)
{
	struct msn_data *md = gc->proto_data;
	char *who = msn_normalize(name);
	char buf[MSN_BUF_LEN];
	GSList *l = md->fl;

	if (who[0] == '@')
		/* how did this happen? */
		return;

	if (strchr(who, ' '))
		/* This is a broken blist entry. */
		return;

	while (l) {
		struct msn_buddy *b = l->data;
		if (!g_strcasecmp(who, b->user))
			break;
		l = l->next;
	}
	if (l)
		return;

	g_snprintf(buf, sizeof(buf), "ADD %u FL %s %s\r\n", ++md->trId, who, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_rem_buddy(struct gaim_connection *gc, char *who, char *group)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];

	g_snprintf(buf, sizeof(buf), "REM %u FL %s\r\n", ++md->trId, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_act_id(gpointer data, char *entry)
{
	struct gaim_connection *gc = data;
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];
	char *alias;

	if (!entry || *entry == '\0') 
		alias = g_strdup("");
	else
		alias = g_strdup(entry);
	
	if (strlen(alias) >= BUDDY_ALIAS_MAXLEN) {
		do_error_dialog(_("New MSN friendly name too long."), NULL, GAIM_ERROR);
		return;
	}
	
	g_snprintf(buf, sizeof(buf), "REA %u %s %s\r\n", ++md->trId, gc->username, url_encode(alias));
	g_free(alias);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_show_set_friendly_name(struct gaim_connection *gc)
{
	do_prompt_dialog(_("Set Friendly Name:"), gc->displayname, gc, msn_act_id, NULL);
}

static GList *msn_actions(struct gaim_connection *gc)
{
	GList *m = NULL;
	struct proto_actions_menu *pam;

	pam = g_new0(struct proto_actions_menu, 1);
	pam->label = _("Set Friendly Name");
	pam->callback = msn_show_set_friendly_name;
	pam->gc = gc;
	m = g_list_append(m, pam);

	return m;
}

static void msn_convo_closed(struct gaim_connection *gc, char *who)
{
	struct msn_switchboard *ms = msn_find_switch(gc, who);

	if (ms) {
		char sendbuf[256];

		g_snprintf(sendbuf, sizeof(sendbuf), "BYE %s\r\n", gc->username);

		msn_write(ms->fd, sendbuf, strlen(sendbuf));

		msn_kill_switch(ms);
	}
}

static void msn_keepalive(struct gaim_connection *gc)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];

	g_snprintf(buf, sizeof(buf), "PNG\r\n");
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_set_permit_deny(struct gaim_connection *gc)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];
	GSList *s, *t = NULL;

	if (gc->user->permdeny == PERMIT_ALL || gc->user->permdeny == DENY_SOME)
		g_snprintf(buf, sizeof(buf), "BLP %u AL\r\n", ++md->trId);
	else
		g_snprintf(buf, sizeof(buf), "BLP %u BL\r\n", ++md->trId);

	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}

	/* this is safe because we'll always come here after we've gotten the list off the server,
	 * and data is never removed. So if the lengths are equal we don't know about anyone locally
	 * and so there's no sense in going through them all. */
	if (g_slist_length(gc->user->permit) == g_slist_length(md->permit)) {
		g_slist_free(md->permit);
		md->permit = NULL;
	}
	if (g_slist_length(gc->user->deny) == g_slist_length(md->deny)) {
		g_slist_free(md->deny);
		md->deny = NULL;
	}
	if (!md->permit && !md->deny)
		return;

	if (md->permit) {
		s = g_slist_nth(gc->user->permit, g_slist_length(md->permit));
		while (s) {
			char *who = s->data;
			s = s->next;
			if (!strchr(who, '@')) {
				t = g_slist_append(t, who);
				continue;
			}
			if (g_slist_find(md->deny, who)) {
				t = g_slist_append(t, who);
				continue;
			}
			g_snprintf(buf, sizeof(buf), "ADD %u AL %s %s\r\n", ++md->trId, who, who);
			if (msn_write(md->fd, buf, strlen(buf)) < 0) {
				hide_login_progress(gc, _("Write error"));
				signoff(gc);
				return;
			}
		}
		while (t) {
			gaim_privacy_permit_remove(gc->user, t->data);
			t = t->next;
		}
		if (t)
			g_slist_free(t);
	t = NULL;
	g_slist_free(md->permit);
	md->permit = NULL;
	}
	
	if (md->deny) {
		s = g_slist_nth(gc->user->deny, g_slist_length(md->deny));
		while (s) {
			char *who = s->data;
			s = s->next;
			if (!strchr(who, '@')) {
				t = g_slist_append(t, who);
				continue;
			}
			if (g_slist_find(md->deny, who)) {
				t = g_slist_append(t, who);
				continue;
			}
			g_snprintf(buf, sizeof(buf), "ADD %u BL %s %s\r\n", ++md->trId, who, who);
			if (msn_write(md->fd, buf, strlen(buf)) < 0) {
				hide_login_progress(gc, _("Write error"));
				signoff(gc);
				return;
			}
		}
		while (t) {
			gaim_privacy_deny_remove(gc->user, t->data);
			t = t->next;
		}
		if (t)
			g_slist_free(t);
	g_slist_free(md->deny);
	md->deny = NULL;
	}
}

static void msn_add_permit(struct gaim_connection *gc, const char *who)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];

	if (!strchr(who, '@')) {
		g_snprintf(buf, sizeof(buf), 
			   _("An MSN screenname must be in the form \"user@server.com\".  "
			     "Perhaps you meant %s@hotmail.com.  No changes were made to your "
			     "allow list."), who);
		do_error_dialog(_("Invalid MSN screenname"), buf, GAIM_ERROR);
		gaim_privacy_permit_remove(gc->user, who);
		return;
	}

	if (g_slist_find_custom(gc->user->deny, who, (GCompareFunc)strcmp)) {
		debug_printf("MSN: Moving %s from BL to AL\n", who);
		gaim_privacy_deny_remove(gc->user, who);
		g_snprintf(buf, sizeof(buf), "REM %u BL %s\r\n", ++md->trId, who);
			if (msn_write(md->fd, buf, strlen(buf)) < 0) {
				hide_login_progress(gc, _("Write error"));
				signoff(gc);
				return;
			}
	}
	g_snprintf(buf, sizeof(buf), "ADD %u AL %s %s\r\n", ++md->trId, who, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_rem_permit(struct gaim_connection *gc, const char *who)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];

	g_snprintf(buf, sizeof(buf), "REM %u AL %s\r\n", ++md->trId, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}

	gaim_privacy_deny_add(gc->user, who);
	g_snprintf(buf, sizeof(buf), "ADD %u BL %s %s\r\n", ++md->trId, who, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_add_deny(struct gaim_connection *gc, const char *who)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];

	if (!strchr(who, '@')) {
		g_snprintf(buf, sizeof(buf), 
			   _("An MSN screenname must be in the form \"user@server.com\".  "
			     "Perhaps you meant %s@hotmail.com.  No changes were made to your "
			     "block list."), who);
		do_error_dialog(_("Invalid MSN screenname"), buf, GAIM_ERROR);
		gaim_privacy_deny_remove(gc->user, who);
		return;
	}

	if (g_slist_find_custom(gc->user->permit, who, (GCompareFunc)strcmp)) {
		debug_printf("MSN: Moving %s from AL to BL\n", who);
		gaim_privacy_permit_remove(gc->user, who);
		g_snprintf(buf, sizeof(buf), "REM %u AL %s\r\n", ++md->trId, who);
		if (msn_write(md->fd, buf, strlen(buf)) < 0) {
			hide_login_progress(gc, _("Write error"));
			signoff(gc);
			return;
		}
	}


	g_snprintf(buf, sizeof(buf), "ADD %u BL %s %s\r\n", ++md->trId, who, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_rem_deny(struct gaim_connection *gc, const char *who)
{
	struct msn_data *md = gc->proto_data;
	char buf[MSN_BUF_LEN];

	g_snprintf(buf, sizeof(buf), "REM %u BL %s\r\n", ++md->trId, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}

	gaim_privacy_permit_add(gc->user, who);
	g_snprintf(buf, sizeof(buf), "ADD %u AL %s %s\r\n", ++md->trId, who, who);
	if (msn_write(md->fd, buf, strlen(buf)) < 0) {
		hide_login_progress(gc, _("Write error"));
		signoff(gc);
		return;
	}
}

static void msn_buddy_free(struct buddy *b)
{
	if (b->proto_data)
		g_free(b->proto_data);
}

G_MODULE_EXPORT void msn_init(struct prpl *ret)
{
	struct proto_user_opt *puo;
	ret->protocol = PROTO_MSN;
	ret->options = OPT_PROTO_MAIL_CHECK;
	ret->name = g_strdup("MSN");
	ret->list_icon = msn_list_icon;
	ret->buddy_menu = msn_buddy_menu;
	ret->login = msn_login;
	ret->close = msn_close;
	ret->send_im = msn_send_im;
	ret->send_typing = msn_send_typing;
	ret->away_states = msn_away_states;
	ret->set_away = msn_set_away;
	ret->set_idle = msn_set_idle;
	ret->add_buddy = msn_add_buddy;
	ret->remove_buddy = msn_rem_buddy;
	ret->chat_send = msn_chat_send;
	ret->chat_invite = msn_chat_invite;
	ret->chat_leave = msn_chat_leave;
	ret->normalize = msn_normalize;
	ret->actions = msn_actions;
	ret->convo_closed = msn_convo_closed;
	ret->keepalive = msn_keepalive;
	ret->set_permit_deny = msn_set_permit_deny;
	ret->add_permit = msn_add_permit;
	ret->rem_permit = msn_rem_permit;
	ret->add_deny = msn_add_deny;
	ret->rem_deny = msn_rem_deny;
	ret->buddy_free = msn_buddy_free;
	ret->file_transfer_cancel = msn_file_transfer_cancel;
	ret->file_transfer_in = msn_file_transfer_in;
	ret->file_transfer_out = msn_file_transfer_out;
	ret->file_transfer_done = msn_file_transfer_done;
	ret->file_transfer_read = msn_file_transfer_read;

	puo = g_new0(struct proto_user_opt, 1);
	puo->label = g_strdup(_("Server:"));
	puo->def = g_strdup(MSN_SERVER);
	puo->pos = USEROPT_MSNSERVER;
	ret->user_opts = g_list_append(ret->user_opts, puo);

	puo = g_new0(struct proto_user_opt, 1);
	puo->label = g_strdup(_("Port:"));
	puo->def = g_strdup("1863");
	puo->pos = USEROPT_MSNPORT;
	ret->user_opts = g_list_append(ret->user_opts, puo);

	my_protocol = ret;
}

#ifndef STATIC

G_MODULE_EXPORT void gaim_prpl_init(struct prpl *prpl)
{
	msn_init(prpl);
	prpl->plug->desc.api_version = PLUGIN_API_VERSION;
}

G_MODULE_EXPORT void gaim_plugin_remove()
{
	struct prpl *p = find_prpl(PROTO_MSN);
	if (p == my_protocol)
		unload_protocol(p);
}

G_MODULE_EXPORT char *name()
{
	return "MSN";
}

G_MODULE_EXPORT char *description()
{
	return PRPL_DESC("MSN");
}

#endif