Chat-O-Matic/protocols/yahoo/YahooCallbacks.cpp

825 lines
20 KiB
C++

/*
* Based on the sample client from libyahoo2. This is a plugin ported from im_kit to Caya,
* the code was updated to support libyahoo2.
*
* Copyright (C) 2002-2004, Philip S Tellis <philip.tellis AT gmx.net>
* Copyright (C) 2010-2011, Barrett
*
* 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 "YahooConnection.h"
#include <netdb.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <termios.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <openssl/ssl.h>
#include <assert.h>
#include "YahooConnection.h"
#include <yahoo2.h>
#include <yahoo2_callbacks.h>
#include <yahoo_util.h>
#include <yahoo2_types.h>
#define LOG printf
int fileno(FILE * stream);
#define MAX_PREF_LEN 255
static time_t curTime = 0;
static time_t pingTimer = 0;
extern "C" void register_callbacks();
typedef struct {
int id;
char *label;
} yahoo_idlabel;
typedef struct {
int id;
char *who;
} yahoo_authorize_data;
static int connection_tags=0;
struct connect_callback_data {
yahoo_connect_callback callback;
void * callback_data;
int id;
int tag;
};
yahoo_idlabel yahoo_status_codes[] = {
{YAHOO_STATUS_AVAILABLE, "Available"},
{YAHOO_STATUS_BRB, "BRB"},
{YAHOO_STATUS_BUSY, "Busy"},
{YAHOO_STATUS_NOTATHOME, "Not Home"},
{YAHOO_STATUS_NOTATDESK, "Not at Desk"},
{YAHOO_STATUS_NOTINOFFICE, "Not in Office"},
{YAHOO_STATUS_ONPHONE, "On Phone"},
{YAHOO_STATUS_ONVACATION, "On Vacation"},
{YAHOO_STATUS_OUTTOLUNCH, "Out to Lunch"},
{YAHOO_STATUS_STEPPEDOUT, "Stepped Out"},
{YAHOO_STATUS_INVISIBLE, "Invisible"},
{YAHOO_STATUS_IDLE, "Idle"},
{YAHOO_STATUS_OFFLINE, "Offline"},
{YAHOO_STATUS_CUSTOM, "[Custom]"},
{YPACKET_STATUS_NOTIFY, "Notify"},
{0, NULL}
};
#define YAHOO_DEBUGLOG ext_yahoo_log
static int expired(time_t timer)
{
if (timer && curTime >= timer)
return 1;
return 0;
}
static void rearm(time_t *timer, int seconds)
{
time(timer);
*timer += seconds;
}
static int yahoo_ping_timeout_callback(int id)
{
yahoo_keepalive(id);
rearm(&pingTimer, 600);
return 1;
}
FILE *popen(const char *command, const char *type);
int pclose(FILE *stream);
int gethostname(char *name, size_t len);
static int yahoo_ping_timeout_callback( int id, time_t & pingTimer )
{
yahoo_keepalive(id);
rearm(&pingTimer, 600);
return 1;
}
extern "C" int ext_yahoo_log(const char *fmt,...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
fflush(stderr);
va_end(ap);
return 0;
}
extern "C" void ext_yahoo_got_conf_invite(int id, const char */*me*/, const char *who, const char *room, const char *msg, YList *members)
{
}
extern "C" void ext_yahoo_conf_userdecline(int /*id*/, const char */*me*/, const char */*who*/, const char */*room*/, const char */*msg*/)
{
}
extern "C" void ext_yahoo_conf_userjoin(int /*id*/, const char */*me*/, const char */*who*/, const char */*room*/)
{
}
extern "C" void ext_yahoo_conf_userleave(int /*id*/, const char */*me*/, const char */*who*/, const char */*room*/)
{
}
extern "C" void ext_yahoo_conf_message(int /*id*/, const char */*me*/, const char */*who*/, const char */*room*/, const char */*msg*/, int /*utf8*/)
{
}
extern "C" void ext_yahoo_chat_cat_xml(int /*id*/, const char */*xml*/)
{
}
extern "C" void ext_yahoo_chat_join(int id, const char *me, const char *room, const char *topic, YList *members, void *fd)
{
}
extern "C" void ext_yahoo_chat_userjoin(int id, const char *me, const char* room, struct yahoo_chat_member */*who*/)
{
}
extern "C" void ext_yahoo_chat_userleave(int id, const char *me, const char *room, const char *who)
{
}
extern "C" void ext_yahoo_chat_message(int /*id*/, const char */*me*/, const char */*who*/, const char */*room*/, const char */*msg*/, int /*msgtype*/, int /*utf8*/)
{
LOG("ext_yahoo_chat_message\n");
}
extern "C" void ext_yahoo_status_changed(int id, const char *who, int stat, const char *msg, int away, int idle, int /*mobile*/)
{
LOG("ext_yahoo_status_changed\n");
assert(gYahooConnections[id] != NULL);
gYahooConnections[id]->cbStatusChanged(who, stat, msg, away, idle);
}
extern "C" void ext_yahoo_got_buddies(int id, YList * buds)
{
LOG("ext_yahoo_got_buddies\n");
assert( gYahooConnections[id] != NULL );
gYahooConnections[id]->cbGotBuddies(buds);
}
extern "C" void ext_yahoo_got_ignore(int /*id*/, YList * /*igns*/)
{
}
extern "C" void ext_yahoo_got_im(int id,const char* /*me*/, const char *who, const char *msg, long tm, int stat, int utf8)
{
LOG("ext_yahoo_got_im\n");
assert( gYahooConnections[id] != NULL );
gYahooConnections[id]->cbGotIM(who,msg,tm,stat,utf8);
}
extern "C" void ext_yahoo_rejected(int /*id*/, const char */*who*/, const char */*msg*/)
{
}
extern "C" void ext_yahoo_contact_added(int id, const char */*myid*/, const char *who, const char *msg)
{
}
extern "C" void ext_yahoo_typing_notify(int id, const char */*me*/, const char *who, int stat)
{
assert( gYahooConnections[id] != NULL );
gYahooConnections[id]->cbTypeNotify(who,stat);
}
extern "C" void ext_yahoo_game_notify(int id, const char *me, const char *who, int stat, const char *msg)
{
}
extern "C" void ext_yahoo_mail_notify(int id, const char *from, const char *subj, int cnt)
{
}
extern "C" void ext_yahoo_got_buddyicon(int id, const char */*me*/, const char *who, const char *url, int checksum)
{
// yahoo_http_get(id,url,NULL, 0 , 0, NULL,(void*)who);
}
extern "C" void ext_yahoo_got_buddyicon_checksum(int id, const char */*me*/,const char *who, int /*checksum*/)
{
//yahoo_buddyicon_request(id,who);
}
extern "C" void ext_yahoo_got_buddyicon_request(int id, const char */*me*/, const char *who)
{
}
extern "C" void ext_yahoo_buddyicon_uploaded(int id, const char *url)
{
}
extern "C" void ext_yahoo_got_webcam_image(int /*id*/, const char */*who*/,
const unsigned char */*image*/, unsigned int /*image_size*/, unsigned int /*real_size*/,
unsigned int /*timestamp*/)
{
}
extern "C" void ext_yahoo_webcam_viewer(int /*id*/, const char */*who*/, int /*connect*/)
{
}
extern "C" void ext_yahoo_webcam_closed(int /*id*/, const char */*who*/, int /*reason*/)
{
}
extern "C" void ext_yahoo_webcam_data_request(int /*id*/, int /*send*/)
{
}
extern "C" void ext_yahoo_webcam_invite(int /*id*/, const char */*me*/, const char */*from*/)
{
}
extern "C" void ext_yahoo_webcam_invite_reply(int /*id*/, const char */*me*/, const char */*from*/, int /*accept*/)
{
}
extern "C" void ext_yahoo_system_message(int id, const char *me, const char *who, const char *msg)
{
LOG("%s\n",msg);
}
extern "C" void ext_yahoo_got_file(int id, const char *me, const char *who, const char *msg, const char *fname, unsigned long fesize, char *trid)
{
}
extern "C" void ext_yahoo_got_identities(int /*id*/, YList * /*ids*/)
{
}
extern "C" void ext_yahoo_chat_yahoologout(int /*id*/, const char */*me*/)
{
}
extern "C" void ext_yahoo_chat_yahooerror(int /*id*/, const char */*me*/)
{
}
extern "C" void ext_yahoo_got_search_result(int /*id*/, int /*found*/, int /*start*/, int /*total*/, YList */*contacts*/)
{
}
extern "C" void ext_yahoo_got_cookies(int id)
{
assert( gYahooConnections[id] != NULL );
yahoo_get_yab(id);
}
extern "C" void ext_yahoo_login_response(int id, int succ, const char *url)
{
LOG("ext_yahoo_login_response %d\n", id);
assert( gYahooConnections[id] != NULL );
gYahooConnections[id]->cbLoginResponse(succ,url);
}
extern "C" void ext_yahoo_error(int id, const char *err, int fatal, int /*num*/)
{
LOG("ext_yahoo_error\n");
assert( gYahooConnections[id] != NULL );
gYahooConnections[id]->cbYahooError(err,fatal);
}
extern "C" void ext_yahoo_got_ping(int /*id*/, const char */*errormsg*/)
{
}
extern "C" int ext_yahoo_add_handler(int id, void *d, yahoo_input_condition cond, void *data)
{
LOG("ext_yahoo_add_handler %d\n", id);
if (id < 0) { // 'connect' connection
struct conn_handler *c = y_new0(struct conn_handler, 1);
c->tag = ++connection_tags;
c->id = id;
c->con = (_conn*) d;
c->cond = cond;
c->data = data;
return c->tag;
}
assert( gYahooConnections[id] != NULL );
struct conn_handler* c = y_new0(struct conn_handler, 1);
c->tag = ++connection_tags;
c->id = id;
c->con = (_conn*) d;
c->cond = cond;
c->data = data;
LOG("Add fd %p for %d, tag %d, cond %d\n", c->con->fd, id, c->tag, c->cond);
gYahooConnections[id]->AddConnection( c );
return c->tag;
}
extern "C" void ext_yahoo_remove_handler(int id, int tag)
{
LOG("ext_yahoo_remove_handler %d\n", id);
if (!tag)
return;
assert(gYahooConnections[id] != NULL);
YahooConnection * conn = gYahooConnections[id];
for (int i=0; i < conn->CountConnections(); i++) {
struct conn_handler *c = conn->ConnectionAt(i);
if(c->tag == tag) {
/* don't actually remove it, just mark it for removal */
/* we'll remove when we start the next poll cycle */
LOG(" Marking id:%d con:%p tag:%d for removal\n", c->id, c->con, c->tag);
c->remove = 1;
return;
}
}
}
extern "C" int ext_yahoo_connect(const char *host, int port)
{
//deprecated
return -1;
}
static int ext_yahoo_write(void *fd, char *buf, int len)
{
LOG("ext_yahoo_write\n");
struct _conn *c = (_conn*)fd;
if (c->use_ssl)
return SSL_write(c->ssl, buf, len);
else
return write(c->fd, buf, len);
}
static int ext_yahoo_read(void *fd, char *buf, int len)
{
LOG("ext_yahoo_read\n");
struct _conn *c = (_conn*)fd;
if (c->use_ssl)
return SSL_read(c->ssl, buf, len);
else
return read(c->fd, buf, len);
}
static void ext_yahoo_close(void *fd)
{
LOG("ext_yahoo_close\n");
struct _conn *c = (_conn*)fd;
if (c->use_ssl)
SSL_free(c->ssl);
close(c->fd);
c->fd = 0;
std::map<int, YahooConnection*>::iterator it;
int h = 0;
for (it = gYahooConnections.begin(); it != gYahooConnections.end(); it++) {
int i = 0;
if (it->second == NULL)
continue;
int count = it->second->CountConnections();
while (i < count) {
if (it->second->ConnectionAt(i)->con == c) {
it->second->ConnectionAt(i)->remove = 1;
}
i++;
}
}
c->remove = 1;
}
static SSL *do_ssl_connect(int fd)
{
SSL *ssl;
SSL_CTX *ctx;
LOG("SSL Handshake\n");
SSL_library_init ();
ctx = SSL_CTX_new(SSLv23_client_method());
ssl = SSL_new(ctx);
SSL_CTX_free(ctx);
SSL_set_fd(ssl, fd);
if (SSL_connect(ssl) == 1)
return ssl;
return NULL;
}
extern "C" int ext_yahoo_connect_async(int id, const char *host, int port,
yahoo_connect_callback callback, void *data, int use_ssl)
{
struct sockaddr_in serv_addr;
static struct hostent *server;
int servfd;
struct connect_callback_data * ccd;
int error;
SSL *ssl = NULL;
struct _conn *c;
LOG("Connecting to %s:%d\n", host, port);
if (!(server = gethostbyname(host))) {
errno=h_errno;
return -1;
}
if ((servfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
return -1;
}
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
memcpy(&serv_addr.sin_addr.s_addr, *server->h_addr_list, server->h_length);
serv_addr.sin_port = htons(port);
c = y_new0(struct _conn, 1);
c->fd = servfd;
c->use_ssl = use_ssl;
error = connect(servfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
LOG("Trying to connect: fd:%d error:%d\n", servfd, error);
if (!error) {
LOG("Connected\n");
if (use_ssl) {
ssl = do_ssl_connect(servfd);
if (!ssl) {
LOG("SSL Handshake Failed!\n");
ext_yahoo_close(c);
callback(NULL, 0, data);
return -1;
}
}
c->ssl = ssl;
fcntl(c->fd, F_SETFL, O_NONBLOCK);
callback(c, 0, data);
return 0;
} else if (error == -1 && errno == EINPROGRESS) {
ccd = (connect_callback_data*) calloc(1, sizeof(struct connect_callback_data));
ccd->callback = callback;
ccd->callback_data = data;
ccd->id = id;
ccd->tag = ext_yahoo_add_handler(-1, c, YAHOO_INPUT_WRITE, ccd);
return ccd->tag;
} else {
if(error == -1)
LOG("Connection failure: %s\n", strerror(errno));
ext_yahoo_close(c);
callback(NULL, errno, data);
return -1;
}
}
/*************************************
* Callback handling code starts here
*/
void cb_yahoo_url_handle(int id, int fd, int error, const char */*filename*/, unsigned long size, void *data)
{
const char *who = (const char*)data;
char byte;
BString buff;
unsigned long count = 0;
while (count <= size) {
read(fd,&byte,1);
count++;
buff << byte;
}
assert( gYahooConnections[id] != NULL );
LOG(buff.String());
gYahooConnections[id]->cbGotBuddyIcon(who,size,buff.String());
}
static void connect_complete(void *data, struct _conn *source, yahoo_input_condition condition)
{
struct connect_callback_data *ccd = (connect_callback_data *)data;
int error, err_size = sizeof(error);
ext_yahoo_remove_handler(0, ccd->tag);
getsockopt(source->fd, SOL_SOCKET, SO_ERROR, &error, (socklen_t *)&err_size);
// TODO remove this
if(error)
goto err;
LOG("Connected fd: %d, error: %d", source->fd, error);
if (source->use_ssl) {
source->ssl = do_ssl_connect(source->fd);
if (!source->ssl) {
err:
LOG("SSL Handshake Failed!\n");
ext_yahoo_close(source);
ccd->callback(NULL, 0, ccd->callback_data);
free(ccd);
return;
}
}
fcntl(source->fd, F_SETFL, O_NONBLOCK);
ccd->callback(source, error, ccd->callback_data);
free(ccd);
}
void yahoo_callback(struct conn_handler *c, yahoo_input_condition cond)
{
LOG("yahoo_callback\n");
int ret=1;
char buff[1024]={0};
if(c->id < 0) {
connect_complete(c->data, c->con, cond);
} else {
if(cond & YAHOO_INPUT_READ)
ret = yahoo_read_ready(c->id, c->con, c->data);
if(ret>0 && cond & YAHOO_INPUT_WRITE)
ret = yahoo_write_ready(c->id, c->con, c->data);
if(ret == -1)
snprintf(buff, sizeof(buff),
"Yahoo read error (%d): %s", errno, strerror(errno));
else if(ret == 0)
snprintf(buff, sizeof(buff),
"Yahoo read error: Server closed socket");
if(buff[0])
LOG((buff));
}
}
static void ext_yahoo_got_buzz(int id, const char *me, const char *who, long tm)
{
LOG("ext_yahoo_got_buzz()\n");
}
static void ext_yahoo_got_ft_data(int id, const unsigned char *in, int count, void *data)
{
LOG("ext_yahoo_got_ft_data\n");
}
static char *ext_yahoo_get_ip_addr(const char *domain)
{
LOG("ext_yahoo_get_ip_addr()\n");
return NULL;
}
static void ext_yahoo_file_transfer_done(int id, int response, void *data)
{
}
static void ext_yahoo_got_buddy_change_group(int id, const char *me, const char *who,
const char *old_group, const char *new_group)
{
}
/*
* Callback handling code ends here
***********************************/
static char * get_local_addresses()
{
static char addresses[1024];
char buff[1024];
struct hostent * hn;
gethostname(buff,sizeof(buff));
hn = gethostbyname(buff);
if(hn)
strncpy(addresses, inet_ntoa( *((struct in_addr*)hn->h_addr)), sizeof(addresses) );
else
addresses[0] = 0;
return addresses;
}
int32
yahoo_io_thread( void * _data )
{
YahooConnection * conn = (YahooConnection*)_data;
register_callbacks();
conn->fID = yahoo_init_with_attributes(conn->fYahooID, conn->fPassword,
"local_host", "95.252.70.62",
"pager_port", 5050, NULL);
LOG("yahoo_io_thread: id: %s, pass: %s\n", conn->fYahooID, conn->fPassword );
gYahooConnections[conn->fID] = conn;
yahoo_login(conn->fID, YAHOO_STATUS_AVAILABLE);
int lfd = 0;
fd_set inp, outp;
struct timeval tv;
while (conn->IsAlive()) {
snooze(10000);
FD_ZERO(&inp);
FD_ZERO(&outp);
tv.tv_sec=3;
tv.tv_usec=1E4;
lfd=0;
int i;
for(i = 0; i < conn->CountConnections(); i++) {
struct conn_handler *c = conn->ConnectionAt(i);
if(c->remove) {
conn->RemoveConnection(c);
c->remove = 0;
free(c);
} else {
if(c->cond & YAHOO_INPUT_READ)
FD_SET(c->con->fd, &inp);
if(c->cond & YAHOO_INPUT_WRITE)
FD_SET(c->con->fd, &outp);
if(lfd < c->con->fd)
lfd = c->con->fd;
}
}
select(lfd + 1, &inp, &outp, NULL, &tv);
time(&curTime);
for(i = 0; i < conn->CountConnections(); i++) {
struct conn_handler *c = conn->ConnectionAt(i);
if(c->con->remove) {
free(c->con);
c->con = NULL;
break;
}
if(c->remove)
continue;
if(FD_ISSET(c->con->fd, &inp))
yahoo_callback(c, YAHOO_INPUT_READ);
if(FD_ISSET(c->con->fd, &outp))
yahoo_callback(c, YAHOO_INPUT_WRITE);
}
if(expired(pingTimer))
yahoo_ping_timeout_callback(conn->fID);
// if(expired(webcamTimer)) yahoo_webcam_timeout_callback(webcam_id);
}
LOG("Exited loop");
for(int i = 0; i < conn->CountConnections(); i++) {
struct conn_handler *c = conn->ConnectionAt(i);
free(c);
conn->RemoveConnection(c);
}
return 0;
}
extern "C" void register_callbacks()
{
static struct yahoo_callbacks yc;
yc.ext_yahoo_login_response = ext_yahoo_login_response;
yc.ext_yahoo_got_buddies = ext_yahoo_got_buddies;
yc.ext_yahoo_got_ignore = ext_yahoo_got_ignore;
yc.ext_yahoo_got_identities = ext_yahoo_got_identities;
yc.ext_yahoo_got_cookies = ext_yahoo_got_cookies;
yc.ext_yahoo_status_changed = ext_yahoo_status_changed;
yc.ext_yahoo_got_im = ext_yahoo_got_im;
yc.ext_yahoo_got_buzz = ext_yahoo_got_buzz;
yc.ext_yahoo_got_conf_invite = ext_yahoo_got_conf_invite;
yc.ext_yahoo_conf_userdecline = ext_yahoo_conf_userdecline;
yc.ext_yahoo_conf_userjoin = ext_yahoo_conf_userjoin;
yc.ext_yahoo_conf_userleave = ext_yahoo_conf_userleave;
yc.ext_yahoo_conf_message = ext_yahoo_conf_message;
yc.ext_yahoo_chat_cat_xml = ext_yahoo_chat_cat_xml;
yc.ext_yahoo_chat_join = ext_yahoo_chat_join;
yc.ext_yahoo_chat_userjoin = ext_yahoo_chat_userjoin;
yc.ext_yahoo_chat_userleave = ext_yahoo_chat_userleave;
yc.ext_yahoo_chat_message = ext_yahoo_chat_message;
yc.ext_yahoo_chat_yahoologout = ext_yahoo_chat_yahoologout;
yc.ext_yahoo_chat_yahooerror = ext_yahoo_chat_yahooerror;
yc.ext_yahoo_got_webcam_image = ext_yahoo_got_webcam_image;
yc.ext_yahoo_webcam_invite = ext_yahoo_webcam_invite;
yc.ext_yahoo_webcam_invite_reply = ext_yahoo_webcam_invite_reply;
yc.ext_yahoo_webcam_closed = ext_yahoo_webcam_closed;
yc.ext_yahoo_webcam_viewer = ext_yahoo_webcam_viewer;
yc.ext_yahoo_webcam_data_request = ext_yahoo_webcam_data_request;
yc.ext_yahoo_got_file = ext_yahoo_got_file;
yc.ext_yahoo_got_ft_data = ext_yahoo_got_ft_data;
yc.ext_yahoo_get_ip_addr = ext_yahoo_get_ip_addr;
yc.ext_yahoo_file_transfer_done = ext_yahoo_file_transfer_done;
yc.ext_yahoo_contact_added = ext_yahoo_contact_added;
yc.ext_yahoo_rejected = ext_yahoo_rejected;
yc.ext_yahoo_typing_notify = ext_yahoo_typing_notify;
yc.ext_yahoo_game_notify = ext_yahoo_game_notify;
yc.ext_yahoo_mail_notify = ext_yahoo_mail_notify;
yc.ext_yahoo_got_search_result = ext_yahoo_got_search_result;
yc.ext_yahoo_system_message = ext_yahoo_system_message;
yc.ext_yahoo_error = ext_yahoo_error;
yc.ext_yahoo_log = ext_yahoo_log;
yc.ext_yahoo_add_handler = ext_yahoo_add_handler;
yc.ext_yahoo_remove_handler = ext_yahoo_remove_handler;
yc.ext_yahoo_connect = ext_yahoo_connect;
yc.ext_yahoo_connect_async = ext_yahoo_connect_async;
yc.ext_yahoo_read = ext_yahoo_read;
yc.ext_yahoo_write = ext_yahoo_write;
yc.ext_yahoo_close = ext_yahoo_close;
yc.ext_yahoo_got_buddyicon = ext_yahoo_got_buddyicon;
yc.ext_yahoo_got_buddyicon_checksum = ext_yahoo_got_buddyicon_checksum;
yc.ext_yahoo_buddyicon_uploaded = ext_yahoo_buddyicon_uploaded;
yc.ext_yahoo_got_buddyicon_request = ext_yahoo_got_buddyicon_request;
yc.ext_yahoo_got_ping = ext_yahoo_got_ping;
yc.ext_yahoo_got_buddy_change_group = ext_yahoo_got_buddy_change_group;
yahoo_register_callbacks(&yc);
}