libfaim/aim_chat.c

/*
 * aim_chat.c
 *
 * Routines for the Chat service.  Nothing works (yet).
 *
 */

#include <aim.h> 

char *aim_chat_getname(struct aim_conn_t *conn)
{
  if (!conn)
    return NULL;
  if (conn->type != AIM_CONN_TYPE_CHAT)
    return NULL;

  return (char *)conn->priv; /* yuck ! */
}

struct aim_conn_t *aim_chat_getconn(struct aim_session_t *sess, char *name)
{
  int i;

  for (i=0;i<AIM_CONN_MAX;i++)
    {
      if (sess->conns[i].type == AIM_CONN_TYPE_CHAT)
	{
	  if (sess->conns[i].priv)
	    if (!strcmp((char *)sess->conns[i].priv, name))
	      {
		return &sess->conns[i];
	      }
	}
    }
  return NULL;
}

int aim_chat_attachname(struct aim_conn_t *conn, char *roomname)
{
  if (!conn || !roomname)
    return -1;

  conn->priv = malloc(strlen(roomname)+1);
  strcpy(conn->priv, roomname);

  return 0;
}

u_long aim_chat_send_im(struct aim_session_t *sess,
			struct aim_conn_t *conn, 
			char *msg)
{   

  int curbyte,i;
  struct command_tx_struct *newpacket;

  if (!sess || !conn || !msg)
    return 0;
  
  if (!(newpacket = aim_tx_new(0x0002, conn, 1152)))
    return -1;

  newpacket->lock = 1; /* lock struct */

  curbyte  = 0;
  curbyte += aim_putsnac(newpacket->data+curbyte, 
			 0x000e, 0x0005, 0x0000, sess->snac_nextid);

  /* 
   * Generate a random message cookie 
   */
  for (i=0;i<8;i++)
    curbyte += aimutil_put8(newpacket->data+curbyte, (u_char) random());

  /*
   * metaTLV start.  -- i assume this is a metaTLV.  it could be the
   *                    channel ID though.
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0003);

  /*
   * Type 1: Unknown.  Blank.
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  
  /*
   * Type 6: Unknown.  Blank.
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0006);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);

  /*
   * Type 5: Message block.  Contains more TLVs.
   *
   * This could include other information... We just
   * put in a message TLV however.  
   * 
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0005);
  curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg)+4);

  /*
   * SubTLV: Type 1: Message
   */
  curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0001, strlen(msg), msg);
  
  newpacket->commandlen = curbyte;

  newpacket->lock = 0;
  aim_tx_enqueue(sess, newpacket);

  return (sess->snac_nextid++);
}

/*
 * Join a room of name roomname.  This is the first
 * step to joining an already created room.  It's 
 * basically a Service Request for family 0x000e, 
 * with a little added on to specify the exchange
 * and room name.
 *
 */
u_long aim_chat_join(struct aim_session_t *sess,
		     struct aim_conn_t *conn, 
		     u_short exchange,
		     const char *roomname)
{
  struct command_tx_struct *newpacket;
  int i;

  if (!sess || !conn || !roomname)
    return 0;
  
  if (!(newpacket = aim_tx_new(0x0002, conn, 10+9+strlen(roomname)+2)))
    return -1;

  newpacket->lock = 1;
  
  i = aim_putsnac(newpacket->data, 0x0001, 0x0004, 0x0000, sess->snac_nextid);

  i+= aimutil_put16(newpacket->data+i, 0x000e);

  /* 
   * this is techinally a TLV, but we can't use normal functions
   * because we need the extraneous nulls and other weird things.
   */
  i+= aimutil_put16(newpacket->data+i, 0x0001);
  i+= aimutil_put16(newpacket->data+i, 2+1+strlen(roomname)+2);
  i+= aimutil_put16(newpacket->data+i, exchange);
  i+= aimutil_put8(newpacket->data+i, strlen(roomname));
  memcpy(newpacket->data+i, roomname, strlen(roomname));
  i+= strlen(roomname);
  //i+= aimutil_putstr(newpacket->data+i, roomname, strlen(roomname));
  i+= aimutil_put16(newpacket->data+i, 0x0000);

  /*
   * Chat hack.
   *
   * XXX: A problem occurs here if we request a channel
   *      join but it fails....pendingjoin will be nonnull
   *      even though the channel is never going to get a
   *      redirect!
   *
   */
  sess->pendingjoin = (char *)malloc(strlen(roomname)+1);
  strcpy(sess->pendingjoin, roomname);

  newpacket->lock = 0;
  aim_tx_enqueue(sess, newpacket);

#if 0
  {
    struct aim_snac_t snac;
    
    snac.id = sess->snac_nextid;
    snac.family = 0x0001;
    snac.type = 0x0004;
    snac.flags = 0x0000;

    snac.data = malloc(strlen(roomname)+1);
    strcpy(snac.data, roomname);

    aim_newsnac(sess, &snac);
  }

#endif
  return (sess->snac_nextid++);
}

int aim_chat_readroominfo(u_char *buf, struct aim_chat_roominfo *outinfo)
{
  int namelen = 0;
  int i = 0;

  if (!buf || !outinfo)
    return 0;

  outinfo->exchange = aimutil_get16(buf+i);
  i += 2;

  namelen = aimutil_get8(buf+i);
  i += 1;

  outinfo->name = (char *)malloc(namelen+1);
  memcpy(outinfo->name, buf+i, namelen);
  outinfo->name[namelen] = '\0';
  i += namelen;

  outinfo->instance = aimutil_get16(buf+i);
  i += 2;
  
  return i;
};


/*
 * General room information.  Lots of stuff.
 *
 * Values I know are in here but I havent attached
 * them to any of the 'Unknown's:
 *	- Language (English)
 *
 */
int aim_chat_parse_infoupdate(struct aim_session_t *sess,
			      struct command_rx_struct *command)
{
  struct aim_userinfo_s *userinfo = NULL;
  rxcallback_t userfunc=NULL;	
  int ret = 1, i = 0;
  int usercount = 0;
  u_char detaillevel = 0;
  char *roomname = NULL;
  struct aim_chat_roominfo roominfo;
  u_short tlvcount = 0;
  struct aim_tlvlist_t *tlvlist;
  char *roomdesc = NULL;

  i = 10;
  i += aim_chat_readroominfo(command->data+i, &roominfo);
  
  detaillevel = aimutil_get8(command->data+i);
  i++;
  
  tlvcount = aimutil_get16(command->data+i);
  i += 2;

  /*
   * Everything else are TLVs.
   */ 
  tlvlist = aim_readtlvchain(command->data+i, command->commandlen-i);
  
  /*
   * TLV type 0x006a is the room name in Human Readable Form.
   */
  if (aim_gettlv(tlvlist, 0x006a, 1))
      roomname = aim_gettlv_str(tlvlist, 0x006a, 1);

  /*
   * Type 0x006f: Number of occupants.
   */
  if (aim_gettlv(tlvlist, 0x006f, 1))
    {
      struct aim_tlv_t *tmptlv;
      tmptlv = aim_gettlv(tlvlist, 0x006f, 1);

      usercount = aimutil_get16(tmptlv->value);
    }

  /*
   * Type 0x0073:  Occupant list.
   */
  if (aim_gettlv(tlvlist, 0x0073, 1))
    {	
      int curoccupant = 0;
      struct aim_tlv_t *tmptlv;

      tmptlv = aim_gettlv(tlvlist, 0x0073, 1);

      /* Allocate enough userinfo structs for all occupants */
      userinfo = calloc(usercount, sizeof(struct aim_userinfo_s));

      i = 0;
      while (curoccupant < usercount)
	i += aim_extractuserinfo(tmptlv->value+i, &userinfo[curoccupant++]);
    }
  
  /* 
   * Type 0x00c9: Unknown.
   */
  if (aim_gettlv(tlvlist, 0x00c9, 1))
    ;
  
  /* 
   * Type 0x00ca: Creation date
   */
  if (aim_gettlv(tlvlist, 0x00ca, 1))
    ;

  /* 
   * Type 0x00d1: Maximum Message Length
   */
  if (aim_gettlv(tlvlist, 0x00d1, 1))
    ;

  /* 
   * Type 0x00d2: Unknown.
   */
  if (aim_gettlv(tlvlist, 0x00d2, 1))
    ;

  /* 
   * Type 0x00d3: Room Description
   */
  if (aim_gettlv(tlvlist, 0x00d3, 1))
    roomdesc = aim_gettlv_str(tlvlist, 0x00d3, 1);

  /* 
   * Type 0x00d5: Unknown.
   */
  if (aim_gettlv(tlvlist, 0x00d5, 1))
    ;


  userfunc = aim_callhandler(command->conn, AIM_CB_FAM_CHT, AIM_CB_CHT_ROOMINFOUPDATE);
  if (userfunc)
    {
      ret = userfunc(sess,
		     command, 
		     &roominfo,
		     roomname,
		     usercount,
		     userinfo,	
		     roomdesc);
    }
  free(roominfo.name);
  free(userinfo);
  free(roomname);
  free(roomdesc);
  aim_freetlvchain(&tlvlist);
 
  return ret;
}

int aim_chat_parse_joined(struct aim_session_t *sess,
			      struct command_rx_struct *command)
{
  struct aim_userinfo_s *userinfo = NULL;
  rxcallback_t userfunc=NULL;	
  int i = 10, curcount = 0, ret = 1;

  while (i < command->commandlen)
    {
      curcount++;
      userinfo = realloc(userinfo, curcount * sizeof(struct aim_userinfo_s));
      i += aim_extractuserinfo(command->data+i, &userinfo[curcount-1]);
    }

  userfunc = aim_callhandler(command->conn, AIM_CB_FAM_CHT, AIM_CB_CHT_USERJOIN);
  if (userfunc)
    {
      ret = userfunc(sess,
		     command, 
		     curcount,
		     userinfo);
    }

  free(userinfo);

  return ret;
}	      

int aim_chat_parse_leave(struct aim_session_t *sess,
			      struct command_rx_struct *command)
{

  struct aim_userinfo_s *userinfo = NULL;
  rxcallback_t userfunc=NULL;	
  int i = 10, curcount = 0, ret = 1;

  while (i < command->commandlen)
    {
      curcount++;
      userinfo = realloc(userinfo, curcount * sizeof(struct aim_userinfo_s));
      i += aim_extractuserinfo(command->data+i, &userinfo[curcount-1]);
    }

  userfunc = aim_callhandler(command->conn, AIM_CB_FAM_CHT, AIM_CB_CHT_USERLEAVE);
  if (userfunc)
    {
      ret = userfunc(sess,
		     command, 
		     curcount,
		     userinfo);
    }

  free(userinfo);

  return ret;
}	   

/*
 * We could probably include this in the normal ICBM parsing 
 * code as channel 0x0003, however, since only the start
 * would be the same, we might as well do it here.
 */
int aim_chat_parse_incoming(struct aim_session_t *sess,
			      struct command_rx_struct *command)
{
  struct aim_userinfo_s userinfo;
  rxcallback_t userfunc=NULL;	
  int ret = 1, i = 0, z = 0;
  u_char cookie[8];
  int channel;
  struct aim_tlvlist_t *outerlist;
  char *msg = NULL;

  memset(&userinfo, 0x00, sizeof(struct aim_userinfo_s));

  i = 10; /* skip snac */

  /*
   * ICBM Cookie.  Ignore it.
   */ 
  for (z=0; z<8; z++,i++)
    cookie[z] = command->data[i];

  /*
   * Channel ID
   *
   * Channels 1 and 2 are implemented in the normal ICBM
   * parser.
   *
   * We only do channel 3 here.
   *
   */
  channel = aimutil_get16(command->data+i);
  i += 2;

  if (channel != 0x0003)
    {
      printf("faim: chat_incoming: unknown channel! (0x%04x)\n", channel);
      return 1;
    }

  /*
   * Start parsing TLVs right away. 
   */
  outerlist = aim_readtlvchain(command->data+i, command->commandlen-i);
  
  /*
   * Type 0x0003: Source User Information
   */
  if (aim_gettlv(outerlist, 0x0003, 1))
    {
      struct aim_tlv_t *userinfotlv;
      
      userinfotlv = aim_gettlv(outerlist, 0x0003, 1);
      aim_extractuserinfo(userinfotlv->value, &userinfo);
    }

  /*
   * Type 0x0001: Unknown.
   */
  if (aim_gettlv(outerlist, 0x0001, 1))
    ;

  /*
   * Type 0x0005: Message Block.  Conains more TLVs.
   */
  if (aim_gettlv(outerlist, 0x0005, 1))
    {
      struct aim_tlvlist_t *innerlist;
      struct aim_tlv_t *msgblock;

      msgblock = aim_gettlv(outerlist, 0x0005, 1);
      innerlist = aim_readtlvchain(msgblock->value, msgblock->length);
      
      /* 
       * Type 0x0001: Message.
       */	
      if (aim_gettlv(innerlist, 0x0001, 1))
	  msg = aim_gettlv_str(innerlist, 0x0001, 1);

      aim_freetlvchain(&innerlist); 
    }

  userfunc = aim_callhandler(command->conn, AIM_CB_FAM_CHT, AIM_CB_CHT_INCOMINGMSG);
  if (userfunc)
    {
      ret = userfunc(sess,
		     command, 
		     &userinfo,
		     msg);
    }
  free(msg);
  aim_freetlvchain(&outerlist);

  return ret;
}	      

u_long aim_chat_clientready(struct aim_session_t *sess,
			    struct aim_conn_t *conn)
{
  struct command_tx_struct *newpacket;
  int i;

  if (!(newpacket = aim_tx_new(0x0002, conn, 0x20)))
    return -1;

  newpacket->lock = 1;

  i = aim_putsnac(newpacket->data, 0x0001, 0x0002, 0x0000, sess->snac_nextid);

  i+= aimutil_put16(newpacket->data+i, 0x000e);
  i+= aimutil_put16(newpacket->data+i, 0x0001);

  i+= aimutil_put16(newpacket->data+i, 0x0004);
  i+= aimutil_put16(newpacket->data+i, 0x0001);

  i+= aimutil_put16(newpacket->data+i, 0x0001);
  i+= aimutil_put16(newpacket->data+i, 0x0003);

  i+= aimutil_put16(newpacket->data+i, 0x0004);
  i+= aimutil_put16(newpacket->data+i, 0x0686);

  newpacket->lock = 0;
  aim_tx_enqueue(sess, newpacket);

  return (sess->snac_nextid++);
}

int aim_chat_leaveroom(struct aim_session_t *sess, char *name)
{
  int i;

  for (i=0;i<AIM_CONN_MAX;i++)
    {
      if (sess->conns[i].type == AIM_CONN_TYPE_CHAT)
	{
	  if (sess->conns[i].priv)
	    if (!strcmp((char *)sess->conns[i].priv, name))
	      {
		aim_conn_close(&sess->conns[i]);
		return 0;
	      }
	}
    }
  return -1;
}

/*
 * conn must be a BOS connection!
 */
u_long aim_chat_invite(struct aim_session_t *sess,
		       struct aim_conn_t *conn,
		       char *sn,
		       char *msg,
		       u_short exchange,
		       char *roomname,
		       u_short instance)
{
  struct command_tx_struct *newpacket;
  int i,curbyte=0;

  if (!sess || !conn || !sn || !msg || !roomname)
    return 0;

  if (!(newpacket = aim_tx_new(0x0002, conn, 1152+strlen(sn)+strlen(roomname)+strlen(msg))))
    return -1;

  newpacket->lock = 1;

  curbyte = aim_putsnac(newpacket->data, 0x0004, 0x0006, 0x0000, sess->snac_nextid);

  /*
   * Cookie
   */
  for (i=0;i<8;i++)
    curbyte += aimutil_put8(newpacket->data+curbyte, (u_char)rand());

  /*
   * Channel (2)
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0002);

  /*
   * Dest sn
   */
  curbyte += aimutil_put8(newpacket->data+curbyte, strlen(sn));
  curbyte += aimutil_putstr(newpacket->data+curbyte, sn, strlen(sn));

  /*
   * TLV t(0005)
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0005);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x28+strlen(msg)+0x04+0x03+strlen(roomname)+0x02);
  
  /* 
   * Unknown info
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x3131);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x3538);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x3446);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x4100);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x748f);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x2420);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x6287);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x11d1);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x8222);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x4445);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x5354);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  
  /*
   * TLV t(000a) -- Unknown
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x000a);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0002);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001);
  
  /*
   * TLV t(000f) -- Unknown
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x000f);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  
  /*
   * TLV t(000c) -- Invitation message
   */
  curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000c, strlen(msg), msg);

  /*
   * TLV t(2711) -- Container for room information 
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x2711);
  curbyte += aimutil_put16(newpacket->data+curbyte, 3+strlen(roomname)+2);
  curbyte += aimutil_put16(newpacket->data+curbyte, exchange);
  curbyte += aimutil_put8(newpacket->data+curbyte, strlen(roomname));
  curbyte += aimutil_putstr(newpacket->data+curbyte, roomname, strlen(roomname));
  curbyte += aimutil_put16(newpacket->data+curbyte, instance);

  newpacket->commandlen = curbyte;
  newpacket->lock = 0;
  aim_tx_enqueue(sess, newpacket);

  return (sess->snac_nextid++);
}