yahoo.c

yahoo message protocol stack

/*
 * 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 "internal.h"

#include "account.h"
#include "accountopt.h"
#include "blist.h"
#include "debug.h"
#include "notify.h"
#include "privacy.h"
#include "prpl.h"
#include "proxy.h"
#include "request.h"
#include "server.h"
#include "util.h"
#include "version.h"

#include "sha.h"
#include "yahoo.h"
#include "yahoo_friend.h"
#include "yahoochat.h"
#include "ycht.h"
#include "yahoo_auth.h"
#include "yahoo_filexfer.h"
#include "yahoo_picture.h"
#include "md5.h"

extern char *yahoo_crypt(const char *, const char *);

/* #define YAHOO_DEBUG */

static void yahoo_add_buddy(GaimConnection *gc, GaimBuddy *, GaimGroup *);
static void yahoo_login_page_cb(void *user_data, const char *buf, size_t len);


struct yahoo_packet *yahoo_packet_new(enum yahoo_service service, enum yahoo_status status, int id)
{
	struct yahoo_packet *pkt = g_new0(struct yahoo_packet, 1);

	pkt->service = service;
	pkt->status = status;
	pkt->id = id;

	return pkt;
}

void yahoo_packet_hash(struct yahoo_packet *pkt, int key, const char *value)
{
	struct yahoo_pair *pair = g_new0(struct yahoo_pair, 1);
	pair->key = key;
	pair->value = g_strdup(value);
	pkt->hash = g_slist_append(pkt->hash, pair);
}

int yahoo_packet_length(struct yahoo_packet *pkt)
{
	GSList *l;

	int len = 0;

	l = pkt->hash;
	while (l) {
		struct yahoo_pair *pair = l->data;
		int tmp = pair->key;
		do {
			tmp /= 10;
			len++;
		} while (tmp);
		len += 2;
		len += strlen(pair->value);
		len += 2;
		l = l->next;
	}

	return len;
}

static void yahoo_packet_read(struct yahoo_packet *pkt, guchar *data, int len)
{
	int pos = 0;

	while (pos + 1 < len) {
		char key[64], *value = NULL, *esc;
		int accept;
		int x;

		struct yahoo_pair *pair = g_new0(struct yahoo_pair, 1);

		/* this is weird, and in one of the chat packets, and causes us
		 * think all the values are keys and all the keys are values after
		 * this point if we don't handle it */
		if (data[pos] == '\0') {
			while (pos + 1 < len) {
				if (data[pos] == 0xc0 && data[pos + 1] == 0x80)
					break;
				pos++;
			}
			pos += 2;
			g_free(pair);
			continue;
		}

		x = 0;
		while (pos + 1 < len) {
			if (data[pos] == 0xc0 && data[pos + 1] == 0x80)
				break;
			if (x >= sizeof(key)-1) {
				x++;
				pos++;
				continue;
			}
			key[x++] = data[pos++];
		}
		if (x >= sizeof(key)-1) {
			x = 0;
		}
		key[x] = 0;
		pos += 2;
		pair->key = strtol(key, NULL, 10);
		accept = x; /* if x is 0 there was no key, so don't accept it */

		if (len - pos + 1 <= 0) {
			/* Truncated. Garbage or something. */
			accept = 0;
		}

		if (accept) {
			value = g_malloc(len - pos + 1);
			x = 0;
			while (pos + 1 < len) {
				if (data[pos] == 0xc0 && data[pos + 1] == 0x80)
					break;
				value[x++] = data[pos++];
			}
			value[x] = 0;
			pair->value = g_strdup(value);
			g_free(value);
			pkt->hash = g_slist_append(pkt->hash, pair);
			esc = g_strescape(pair->value, NULL);
			gaim_debug(GAIM_DEBUG_MISC, "yahoo",
					   "Key: %d  \tValue: %s\n", pair->key, esc);
			g_free(esc);
		} else {
			g_free(pair);
		}
		pos += 2;

		/* Skip over garbage we've noticed in the mail notifications */
		if (data[0] == '9' && data[pos] == 0x01)
			pos++;
	}
}

void yahoo_packet_write(struct yahoo_packet *pkt, guchar *data)
{
	GSList *l = pkt->hash;
	int pos = 0;

	while (l) {
		struct yahoo_pair *pair = l->data;
		guchar buf[100];

		g_snprintf(buf, sizeof(buf), "%d", pair->key);
		strcpy(data + pos, buf);
		pos += strlen(buf);
		data[pos++] = 0xc0;
		data[pos++] = 0x80;

		strcpy(data + pos, pair->value);
		pos += strlen(pair->value);
		data[pos++] = 0xc0;
		data[pos++] = 0x80;

		l = l->next;
	}
}

static void yahoo_packet_dump(guchar *data, int len)
{
#ifdef YAHOO_DEBUG
	int i;

	gaim_debug(GAIM_DEBUG_MISC, "yahoo", "");

	for (i = 0; i + 1 < len; i += 2) {
		if ((i % 16 == 0) && i) {
			gaim_debug(GAIM_DEBUG_MISC, NULL, "\n");
			gaim_debug(GAIM_DEBUG_MISC, "yahoo", "");
		}

		gaim_debug(GAIM_DEBUG_MISC, NULL, "%02x%02x ", data[i], data[i + 1]);
	}
	if (i < len)
		gaim_debug(GAIM_DEBUG_MISC, NULL, "%02x", data[i]);

	gaim_debug(GAIM_DEBUG_MISC, NULL, "\n");
	gaim_debug(GAIM_DEBUG_MISC, "yahoo", "");

	for (i = 0; i < len; i++) {
		if ((i % 16 == 0) && i) {
			gaim_debug(GAIM_DEBUG_MISC, NULL, "\n");
			gaim_debug(GAIM_DEBUG_MISC, "yahoo", "");
		}

		if (g_ascii_isprint(data[i]))
			gaim_debug(GAIM_DEBUG_MISC, NULL, "%c ", data[i]);
		else
			gaim_debug(GAIM_DEBUG_MISC, NULL, ". ");
	}

	gaim_debug(GAIM_DEBUG_MISC, NULL, "\n");
#endif
}

int yahoo_send_packet(struct yahoo_data *yd, struct yahoo_packet *pkt)
{
	int pktlen = yahoo_packet_length(pkt);
	int len = YAHOO_PACKET_HDRLEN + pktlen;
	int ret;

	guchar *data;
	int pos = 0;

	if (yd->fd < 0)
		return -1;

	data = g_malloc0(len + 1);

	memcpy(data + pos, "YMSG", 4); pos += 4;

	if (yd->wm)
		pos += yahoo_put16(data + pos, YAHOO_WEBMESSENGER_PROTO_VER);
	else
		pos += yahoo_put16(data + pos, YAHOO_PROTO_VER);

	pos += yahoo_put16(data + pos, 0x0000);
	pos += yahoo_put16(data + pos, pktlen);
	pos += yahoo_put16(data + pos, pkt->service);
	pos += yahoo_put32(data + pos, pkt->status);
	pos += yahoo_put32(data + pos, pkt->id);

	yahoo_packet_write(pkt, data + pos);

	yahoo_packet_dump(data, len);
	ret = write(yd->fd, data, len);
	if (ret != len)
		gaim_debug_warning("yahoo", "Only wrote %d of %d bytes!", ret, len);
	g_free(data);

	return ret;
}

int yahoo_send_packet_special(int fd, struct yahoo_packet *pkt, int pad)
{
	int pktlen = yahoo_packet_length(pkt);
	int len = YAHOO_PACKET_HDRLEN + pktlen;
	int ret;

	guchar *data;
	int pos = 0;

	if (fd < 0)
		return -1;

	data = g_malloc0(len + 1);

	memcpy(data + pos, "YMSG", 4); pos += 4;

	pos += yahoo_put16(data + pos, YAHOO_PROTO_VER);

	pos += yahoo_put16(data + pos, 0x0000);
	pos += yahoo_put16(data + pos, pktlen + pad);
	pos += yahoo_put16(data + pos, pkt->service);
	pos += yahoo_put32(data + pos, pkt->status);
	pos += yahoo_put32(data + pos, pkt->id);

	yahoo_packet_write(pkt, data + pos);

	ret = write(fd, data, len);
	g_free(data);

	return ret;
}

void yahoo_packet_free(struct yahoo_packet *pkt)
{
	while (pkt->hash) {
		struct yahoo_pair *pair = pkt->hash->data;
		g_free(pair->value);
		g_free(pair);
		pkt->hash = g_slist_remove(pkt->hash, pair);
	}
	g_free(pkt);
}

static void yahoo_update_status(GaimConnection *gc, const char *name, YahooFriend *f)
{
	gboolean online = TRUE;

	if (!gc || !name || !f || !gaim_find_buddy(gaim_connection_get_account(gc), name))
		return;

	if (f->status == YAHOO_STATUS_OFFLINE)
		online = FALSE;

	serv_got_update(gc, name, online, 0, 0, f->idle, f->away ? UC_UNAVAILABLE : 0);
}

static void yahoo_process_status(GaimConnection *gc, struct yahoo_packet *pkt)
{
	struct yahoo_data *yd = gc->proto_data;
	GSList *l = pkt->hash;
	YahooFriend *f = NULL;
	char *name = NULL;

	if (pkt->service == YAHOO_SERVICE_LOGOFF && pkt->status == -1) {
		gc->wants_to_die = TRUE;
		gaim_connection_error(gc, _("You have been logged off as you have logged in on a different machine or device."));
		return;
	}

	while (l) {
		struct yahoo_pair *pair = l->data;

		switch (pair->key) {
		case 0: /* we won't actually do anything with this */
			break;
		case 1: /* we don't get the full buddy list here. */
			if (!yd->logged_in) {
				gaim_connection_set_display_name(gc, pair->value);
				gaim_connection_set_state(gc, GAIM_CONNECTED);
				serv_finish_login(gc);
				yd->logged_in = TRUE;
				if (yd->picture_upload_todo) {
					yahoo_buddy_icon_upload(gc, yd->picture_upload_todo);
					yd->picture_upload_todo = NULL;
				}

				/* this requests the list. i have a feeling that this is very evil
				 *
				 * scs.yahoo.com sends you the list before this packet without  it being
				 * requested
				 *
				 * do_import(gc, NULL);
				 * newpkt = yahoo_packet_new(YAHOO_SERVICE_LIST, YAHOO_STATUS_OFFLINE, 0);
				 * yahoo_send_packet(yd, newpkt);
				 * yahoo_packet_free(newpkt);
				 */

				}
			break;
		case 8: /* how many online buddies we have */
			break;
		case 7: /* the current buddy */
			name = pair->value;
			if (name && g_utf8_validate(name, -1, NULL))
				f = yahoo_friend_find_or_new(gc, name);
			else {
				f = NULL;
				name = NULL;
			}
			break;
		case 10: /* state */
			if (!f)
				break;

			f->status = strtol(pair->value, NULL, 10);
			if ((f->status >= YAHOO_STATUS_BRB) && (f->status <= YAHOO_STATUS_STEPPEDOUT))
				f->away = 1;
			else
				f->away = 0;
			if (f->status == YAHOO_STATUS_IDLE)
				f->idle = time(NULL);
			else
				f->idle = 0;
			if (f->status != YAHOO_STATUS_CUSTOM)
				yahoo_friend_set_status_message(f, NULL);

			f->sms = 0;
			break;
		case 19: /* custom message */
			if (f)
				yahoo_friend_set_status_message(f, yahoo_string_decode(gc, pair->value, FALSE));
			break;
		case 11: /* this is the buddy's session id */
			break;
		case 17: /* in chat? */
			break;
		case 47: /* is custom status away or not? 2=idle*/
			if (!f)
				break;

			/* I have no idea what it means when this is
			 * set when someone's available, but it doesn't
			 * mean idle. */
			if (f->status == YAHOO_STATUS_AVAILABLE)
				break;
			f->away = strtol(pair->value, NULL, 10);
			if (f->away == 2)
				f->idle = time(NULL);
			break;
		case 138: /* either we're not idle, or we are but won't say how long */
			if (!f)
				break;

			if (f->idle)
				f->idle = -1;
			break;
		case 137: /* usually idle time in seconds, sometimes login time */
			if (!f)
				break;

			if (f->status != YAHOO_STATUS_AVAILABLE)
				f->idle = time(NULL) - strtol(pair->value, NULL, 10);
			break;
		case 13: /* bitmask, bit 0 = pager, bit 1 = chat, bit 2 = game */
			if (strtol(pair->value, NULL, 10) == 0) {
				if (f)
					f->status = YAHOO_STATUS_OFFLINE;
				serv_got_update(gc, name, FALSE, 0, 0, 0, 0);
				break;
			}

			if (f)
				yahoo_update_status(gc, name, f);
			break;
		case 60: /* SMS */
			if (f) {
				f->sms = strtol(pair->value, NULL, 10);
				yahoo_update_status(gc, name, f);
			}
			break;
		case 197: /* Avatars */
		{
			char *decoded, *tmp;
			guint len;

			if (pair->value) {
				gaim_base64_decode(pair->value, &decoded, &len);
				if (len) {
					tmp = gaim_str_binary_to_ascii(decoded, len);
					gaim_debug_info("yahoo", "Got key 197, value = %s\n", tmp);
					g_free(tmp);
				}
				g_free(decoded);
			}
			break;
		}
		case 192: /* Pictures, aka Buddy Icons, checksum */
		{
			int cksum = strtol(pair->value, NULL, 10);
			GaimBuddy *b;

			if (!name)
				break;

			b = gaim_find_buddy(gc->account, name);

			if (!cksum || (cksum == -1)) {
				if (f)
					yahoo_friend_set_buddy_icon_need_request(f, TRUE);
				gaim_buddy_icons_set_for_user(gc->account, name, NULL, 0);
				if (b)
					gaim_blist_node_remove_setting((GaimBlistNode *)b, YAHOO_ICON_CHECKSUM_KEY);
				break;
			}

			if (!f)
				break;

			yahoo_friend_set_buddy_icon_need_request(f, FALSE);
			if (cksum != gaim_blist_node_get_int((GaimBlistNode*)b, YAHOO_ICON_CHECKSUM_KEY))
				yahoo_send_picture_request(gc, name);

			break;
		}
		case 16: /* Custom error message */
			{
				char *tmp = yahoo_string_decode(gc, pair->value, TRUE);
				gaim_notify_error(gc, NULL, tmp, NULL);
				g_free(tmp);
			}
			break;
		default:
			gaim_debug(GAIM_DEBUG_ERROR, "yahoo",
					   "Unknown status key %d\n", pair->key);
			break;
		}

		l = l->next;
	}
}

static void yahoo_do_group_check(GaimAccount *account, GHashTable *ht, const char *name, const char *group)
{
	GaimBuddy *b;
	GaimGroup *g;
	GSList *list, *i;
	gboolean onlist = 0;
	char *oname = NULL;

	char **oname_p = &oname;
	GSList **list_p = &list;

	if (!g_hash_table_lookup_extended(ht, gaim_normalize(account, name), (gpointer *) oname_p, (gpointer *) list_p))
		list = gaim_find_buddies(account, name);
	else
		g_hash_table_steal(ht, name);

	for (i = list; i; i = i->next) {
		b = i->data;
		g = gaim_find_buddys_group(b);
		if (!gaim_utf8_strcasecmp(group, g->name)) {
			gaim_debug(GAIM_DEBUG_MISC, "yahoo",
				"Oh good, %s is in the right group (%s).\n", name, group);
			list = g_slist_delete_link(list, i);