[libfaim.git] / aim_im.c

/*
 *  aim_im.c
 *
 *  The routines for sending/receiving Instant Messages.
 *
 */

#include <faim/aim.h>

/*
 * Send an ICBM (instant message).  
 *
 *
 * Possible flags:
 *   AIM_IMFLAGS_AWAY  -- Marks the message as an autoresponse
 *   AIM_IMFLAGS_ACK   -- Requests that the server send an ack
 *                        when the message is received (of type 0x0004/0x000c)
 *
 */
u_long aim_send_im(struct aim_session_t *sess,
		   struct aim_conn_t *conn, 
		   char *destsn, u_int flags, char *msg)
{   

  int curbyte,i;
  struct command_tx_struct *newpacket;
  
  if (!(newpacket = aim_tx_new(0x0002, conn, 1152)))
    return -1;

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

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

  /* 
   * Generate a random message cookie 
   *
   * We could cache these like we do SNAC IDs.  (In fact, it 
   * might be a good idea.)  In the message error functions, 
   * the 8byte message cookie is returned as well as the 
   * SNAC ID.
   *
   */
  for (i=0;i<8;i++)
    curbyte += aimutil_put8(newpacket->data+curbyte, (u_char) random());

  /*
   * Channel ID
   */
  curbyte += aimutil_put16(newpacket->data+curbyte,0x0001);

  /* 
   * Destination SN (prepended with byte length)
   */
  curbyte += aimutil_put8(newpacket->data+curbyte,strlen(destsn));
  curbyte += aimutil_putstr(newpacket->data+curbyte, destsn, strlen(destsn));

  /*
   * metaTLV start.
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0002);
  curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg) + 0x0d);

  /*
   * Flag data?
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0501);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0101);
  curbyte += aimutil_put8 (newpacket->data+curbyte, 0x01);

  /* 
   * Message block length.
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg) + 0x04);

  /*
   * Character set data? 
   */
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);

  /*
   * Message.  Not terminated.
   */
  curbyte += aimutil_putstr(newpacket->data+curbyte,msg, strlen(msg));

  /*
   * Set the Request Acknowledge flag.  
   */
  if (flags & AIM_IMFLAGS_ACK) {
    curbyte += aimutil_put16(newpacket->data+curbyte,0x0003);
    curbyte += aimutil_put16(newpacket->data+curbyte,0x0000);
  }
  
  /*
   * Set the Autoresponse flag.
   */
  if (flags & AIM_IMFLAGS_AWAY) {
    curbyte += aimutil_put16(newpacket->data+curbyte,0x0004);
    curbyte += aimutil_put16(newpacket->data+curbyte,0x0000);
  }
  
  newpacket->commandlen = curbyte;
  newpacket->lock = 0;

  aim_tx_enqueue(sess, newpacket);

#ifdef USE_SNAC_FOR_IMS
 {
    struct aim_snac_t snac;

    snac.id = sess->snac_nextid;
    snac.family = 0x0004;
    snac.type = 0x0006;
    snac.flags = 0x0000;

    snac.data = malloc(strlen(destsn)+1);
    memcpy(snac.data, destsn, strlen(destsn)+1);

    aim_newsnac(sess, &snac);
  }

 aim_cleansnacs(sess, 60); /* clean out all SNACs over 60sec old */
#endif

  return (sess->snac_nextid++);
}

/*
 * It can easily be said that parsing ICBMs is THE single
 * most difficult thing to do in the in AIM protocol.  In
 * fact, I think I just did say that.
 *
 * Below is the best damned solution I've come up with
 * over the past sixteen months of battling with it. This
 * can parse both away and normal messages from every client
 * I have access to.  Its not fast, its not clean.  But it works.
 *
 * We should also support at least minimal parsing of 
 * Channel 2, so that we can at least know the name of the
 * room we're invited to, but obviously can't attend...
 *
 */
int aim_parse_incoming_im_middle(struct aim_session_t *sess,
				 struct command_rx_struct *command)
{
  u_int i = 0,z;
  rxcallback_t userfunc = NULL;
  u_char cookie[8];
  int channel;
  struct aim_tlvlist_t *tlvlist;
  struct aim_userinfo_s userinfo;
  u_short wastebits;

  memset(&userinfo, 0x00, sizeof(struct aim_userinfo_s));
 
  i = 10; /* Skip SNAC header */

  /*
   * Read ICBM Cookie.  And throw away.
   */
  for (z=0; z<8; z++,i++)
    cookie[z] = command->data[i];
  
  /*
   * Channel ID.
   *
   * Channel 0x0001 is the message channel.  There are 
   * other channels for things called "rendevous"
   * which represent chat and some of the other new
   * features of AIM2/3/3.5. 
   *
   * Channel 0x0002 is the Rendevous channel, which
   * is where Chat Invitiations and various client-client
   * connection negotiations come from.
   * 
   */
  channel = aimutil_get16(command->data+i);
  i += 2;
  
  /*
   *
   */
  if ((channel != 0x01) && (channel != 0x02))
    {
      printf("faim: icbm: ICBM received on an unsupported channel.  Ignoring.\n (chan = %04x)", channel);
      return 1;
    }

  /*
   * Source screen name.
   */
  memcpy(userinfo.sn, command->data+i+1, (int)command->data[i]);
  userinfo.sn[(int)command->data[i]] = '\0';
  i += 1 + (int)command->data[i];

  /*
   * Warning Level
   */
  userinfo.warnlevel = aimutil_get16(command->data+i); /* guess */
  i += 2;

  /*
   * Number of TLVs that follow.  Not needed.
   */
  wastebits = aimutil_get16(command->data+i);
  i += 2;
  
  /*
   * Read block of TLVs.  All further data is derived
   * from what is parsed here.
   */
  tlvlist = aim_readtlvchain(command->data+i, command->commandlen-i);

  /*
   * From here on, its depends on what channel we're on.
   */
  if (channel == 1)
    {
     u_int j = 0, y = 0, z = 0;
      char *msg = NULL;
      u_int icbmflags = 0;
      struct aim_tlv_t *msgblocktlv, *tmptlv;
      u_char *msgblock;
      u_short flag1,flag2;
           
      /*
       * Check Autoresponse status.  If it is an autoresponse,
       * it will contain a second type 0x0004 TLV, with zero length.
       */
      if (aim_gettlv(tlvlist, 0x0004, 2))
	icbmflags |= AIM_IMFLAGS_AWAY;
      
      /*
       * Check Ack Request status.
       */
      if (aim_gettlv(tlvlist, 0x0003, 2))
	icbmflags |= AIM_IMFLAGS_ACK;
      
      /*
       * Extract the various pieces of the userinfo struct.
       */
      /* Class. */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0001, 1)))
	userinfo.class = aimutil_get16(tmptlv->value);
      /* Member-since date. */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0002, 1)))
	{
	  /* If this is larger than 4, its probably the message block, skip */
	  if (tmptlv->length <= 4)
	    userinfo.membersince = aimutil_get32(tmptlv->value);
	}
      /* On-since date */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0003, 1)))
	userinfo.onlinesince = aimutil_get32(tmptlv->value);
      /* Idle-time */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0004, 1)))
	userinfo.idletime = aimutil_get16(tmptlv->value);
      /* Session Length (AIM) */
      if ((tmptlv = aim_gettlv(tlvlist, 0x000f, 1)))
	userinfo.sessionlen = aimutil_get16(tmptlv->value);
      /* Session Length (AOL) */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0010, 1)))
	userinfo.sessionlen = aimutil_get16(tmptlv->value);
      
      /*
       * Message block.
       *
       * XXX: Will the msgblock always be the second 0x0002? 
       */
      msgblocktlv = aim_gettlv(tlvlist, 0x0002, 1);
      if (!msgblocktlv)
	{
	  printf("faim: icbm: major error! no message block TLV found!\n");
	  aim_freetlvchain(&tlvlist);
	  return 1;
	}
      
      /*
       * Extracting the message from the unknown cruft.
       * 
       * This is a bit messy, and I'm not really qualified,
       * even as the author, to comment on it.  At least
       * its not as bad as a while loop shooting into infinity.
       *
       * "Do you believe in magic?"
       *
       */
      msgblock = msgblocktlv->value;
      j = 0;
      
      wastebits = aimutil_get8(msgblock+j++);
      wastebits = aimutil_get8(msgblock+j++);
      
      y = aimutil_get16(msgblock+j);
      j += 2;
      for (z = 0; z < y; z++)
	wastebits = aimutil_get8(msgblock+j++);
      wastebits = aimutil_get8(msgblock+j++);
      wastebits = aimutil_get8(msgblock+j++);
      
      /* 
       * Message string length, including flag words.
       */
      i = aimutil_get16(msgblock+j);
      j += 2;
      
      /*
       * Flag words.
       *
       * Its rumored that these can kick in some funky
       * 16bit-wide char stuff that used to really kill
       * libfaim.  Hopefully the latter is no longer true.
       *
       * Though someone should investiagte the former.
       *
       */
      flag1 = aimutil_get16(msgblock+j);
      j += 2;
      flag2 = aimutil_get16(msgblock+j);
      j += 2;
      
      if (flag1 || flag2)
	printf("faim: icbm: **warning: encoding flags are being used! {%04x, %04x}\n", flag1, flag2);
      
      /* 
       * Message string. 
       */
      i -= 4;
      msg = (char *)malloc(i+1);
      memcpy(msg, msgblock+j, i);
      msg[i] = '\0';
      
      /*
       * Call client.
       */
      userfunc = aim_callhandler(command->conn, 0x0004, 0x0007);
      if (userfunc)
	i = userfunc(sess, command, channel, &userinfo, msg, icbmflags, flag1, flag2);
      else 
	i = 0;
      
      free(msg);
    }
  else if (channel == 0x0002)
    {	
      int rendtype;
      struct aim_tlv_t *block1;
      struct aim_tlvlist_t *list2;
      struct aim_tlv_t *tmptlv;
      int a;
      
      /* Class. */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0001, 1)))
	userinfo.class = aimutil_get16(tmptlv->value);
      /* On-since date */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0003, 1)))
	userinfo.onlinesince = aimutil_get32(tmptlv->value);
      /* Idle-time */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0004, 1)))
	userinfo.idletime = aimutil_get16(tmptlv->value);
      /* Session Length (AIM) */
      if ((tmptlv = aim_gettlv(tlvlist, 0x000f, 1)))
	userinfo.sessionlen = aimutil_get16(tmptlv->value);
      /* Session Length (AOL) */
      if ((tmptlv = aim_gettlv(tlvlist, 0x0010, 1)))
	userinfo.sessionlen = aimutil_get16(tmptlv->value);

      /*
       * There's another block of TLVs embedded in the type 5 here. 
       */
      block1 = aim_gettlv(tlvlist, 0x0005, 1);
      if (!block1)
	return 1; /* major problem */

      a = 0x1a; /* skip -- not sure what this information is! */

      /*
       * XXX: Ignore if there's no data, only cookie information.
       *
       * Its probably just an accepted invitation or something.
       *  
       */
      if (block1->length <= 0x1a)
	{
	  aim_freetlvchain(&tlvlist);
	  return 1;
	}

      list2 = aim_readtlvchain(block1->value+a, block1->length-a);

      if (aim_gettlv(list2, 0x0004, 1) /* start connection */ ||  
	  aim_gettlv(list2, 0x000b, 1) /* close conncetion */)
	{
	  rendtype = 1; /* voice request */

	  /*
	   * Call client.
	   */
	  userfunc = aim_callhandler(command->conn, 0x0004, 0x0007);
	  if (userfunc)
	    i = userfunc(sess, 
			 command, 
			 channel, 
			 rendtype,
			 &userinfo);
	  else 
	    i = 0;
	}
      else
	{
	  struct aim_chat_roominfo roominfo;
	  char *msg=NULL,*encoding=NULL,*lang=NULL;

	  rendtype = 0; /* chat invite */
	  if (aim_gettlv(list2, 0x2711, 1))
	    {
	      struct aim_tlv_t *nametlv;
	      
	      nametlv = aim_gettlv(list2, 0x2711, 1);
	      aim_chat_readroominfo(nametlv->value, &roominfo);
	    }
	  
	  if (aim_gettlv(list2, 0x000c, 1))
	    msg = aim_gettlv_str(list2, 0x000c, 1);
	  
	  if (aim_gettlv(list2, 0x000d, 1))
	    encoding = aim_gettlv_str(list2, 0x000d, 1);
	  
	  if (aim_gettlv(list2, 0x000e, 1))
	    lang = aim_gettlv_str(list2, 0x000e, 1);
      
	  /*
	   * Call client.
	   */
	  userfunc = aim_callhandler(command->conn, 0x0004, 0x0007);
	  if (userfunc)
	    i = userfunc(sess, 
			 command, 
			 channel, 
			 rendtype,
			 &userinfo, 
			 &roominfo, 
			 msg, 
			 encoding?encoding+1:NULL, 
			 lang?lang+1:NULL);
	  else 
	    i = 0;
      
	  free(roominfo.name);
	  free(msg);
	  free(encoding);
	  free(lang);
	}
      aim_freetlvchain(&list2);
    }

  /*
   * Free up the TLV chain.
   */
  aim_freetlvchain(&tlvlist);
  

  return i;
}

/*
 * Not real sure what this does, nor does anyone I've talk to.
 *
 * Didn't use to send it.  But now I think it might be a good
 * idea. 
 *
 */
u_long aim_seticbmparam(struct aim_session_t *sess,
			struct aim_conn_t *conn)
{
  struct command_tx_struct *newpacket;
  int curbyte;

  if(!(newpacket = aim_tx_new(0x0002, conn, 10+16)))
    return -1;

  newpacket->lock = 1;

  curbyte = aim_putsnac(newpacket->data, 0x0004, 0x0002, 0x0000, sess->snac_nextid);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  curbyte += aimutil_put32(newpacket->data+curbyte, 0x00000003);
  curbyte += aimutil_put8(newpacket->data+curbyte,  0x1f);
  curbyte += aimutil_put8(newpacket->data+curbyte,  0x40);
  curbyte += aimutil_put8(newpacket->data+curbyte,  0x03);
  curbyte += aimutil_put8(newpacket->data+curbyte,  0xe7);
  curbyte += aimutil_put8(newpacket->data+curbyte,  0x03);
  curbyte += aimutil_put8(newpacket->data+curbyte,  0xe7);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
  curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);

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

  return (sess->snac_nextid++);
}

int aim_parse_msgerror_middle(struct aim_session_t *sess,
			      struct command_rx_struct *command)
{
  u_long snacid = 0x000000000;
  struct aim_snac_t *snac = NULL;
  int ret = 0;
  rxcallback_t userfunc = NULL;

  /*
   * Get SNAC from packet and look it up 
   * the list of unrepliedto/outstanding
   * SNACs.
   *
   * After its looked up, the SN that the
   * message should've gone to will be 
   * in the ->data element of the snac struct.
   *
   */
  snacid = aimutil_get32(command->data+6);
  snac = aim_remsnac(sess, snacid);

  if (!snac)
    {
      printf("faim: msgerr: got an ICBM-failed error on an unknown SNAC ID! (%08lx)\n", snacid);
    }

  /*
   * Call client.
   */
  userfunc = aim_callhandler(command->conn, 0x0004, 0x0001);
  if (userfunc)
    ret =  userfunc(sess, command, (snac)?snac->data:"(UNKNOWN)");
  else
    ret = 0;
  
  free(snac->data);
  free(snac);

  return ret;
}
Commit	Line	Data
9de3ca7e	1	/*
	2	* aim_im.c
	3	*
	4	* The routines for sending/receiving Instant Messages.
	5	*
	6	*/
	7
a25832e6	8	#include <faim/aim.h>
9de3ca7e	9
	10	/*
	11	* Send an ICBM (instant message).
	12	*
	13	*
	14	* Possible flags:
	15	* AIM_IMFLAGS_AWAY -- Marks the message as an autoresponse
	16	* AIM_IMFLAGS_ACK -- Requests that the server send an ack
	17	* when the message is received (of type 0x0004/0x000c)
	18	*
9de3ca7e	19	*/
a25832e6	20	u_long aim_send_im(struct aim_session_t *sess,
	21	struct aim_conn_t *conn,
	22	char destsn, u_int flags, char msg)
9de3ca7e	23	{
9de3ca7e	24
49c8a2fa	25	int curbyte,i;
5b79dc93	26	struct command_tx_struct *newpacket;
9de3ca7e	27
5b79dc93	28	if (!(newpacket = aim_tx_new(0x0002, conn, 1152)))
5b79dc93	29	return -1;
9de3ca7e	30
5b79dc93	31	newpacket->lock = 1; /* lock struct */
9de3ca7e	32
9de3ca7e	33	curbyte = 0;
5b79dc93	34	curbyte += aim_putsnac(newpacket->data+curbyte,
a25832e6	35	0x0004, 0x0006, 0x0000, sess->snac_nextid);
9de3ca7e	36
49c8a2fa	37	/*
49c8a2fa	38	* Generate a random message cookie
a25832e6	39	*
	40	* We could cache these like we do SNAC IDs. (In fact, it
	41	* might be a good idea.) In the message error functions,
	42	* the 8byte message cookie is returned as well as the
	43	* SNAC ID.
	44	*
49c8a2fa	45	*/
49c8a2fa	46	for (i=0;i<8;i++)
5b79dc93	47	curbyte += aimutil_put8(newpacket->data+curbyte, (u_char) random());
9de3ca7e	48
49c8a2fa	49	/*
	50	* Channel ID
	51	*/
5b79dc93	52	curbyte += aimutil_put16(newpacket->data+curbyte,0x0001);
9de3ca7e	53
49c8a2fa	54	/*
	55	* Destination SN (prepended with byte length)
	56	*/
5b79dc93	57	curbyte += aimutil_put8(newpacket->data+curbyte,strlen(destsn));
5b79dc93	58	curbyte += aimutil_putstr(newpacket->data+curbyte, destsn, strlen(destsn));
9de3ca7e	59
49c8a2fa	60	/*
	61	* metaTLV start.
	62	*/
5b79dc93	63	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0002);
5b79dc93	64	curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg) + 0x0d);
9de3ca7e	65
49c8a2fa	66	/*
	67	* Flag data?
	68	*/
5b79dc93	69	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0501);
	70	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001);
	71	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0101);
	72	curbyte += aimutil_put8 (newpacket->data+curbyte, 0x01);
9de3ca7e	73
49c8a2fa	74	/*
	75	* Message block length.
	76	*/
5b79dc93	77	curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg) + 0x04);
9de3ca7e	78
49c8a2fa	79	/*
	80	* Character set data?
	81	*/
5b79dc93	82	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
5b79dc93	83	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
9de3ca7e	84
49c8a2fa	85	/*
	86	* Message. Not terminated.
	87	*/
5b79dc93	88	curbyte += aimutil_putstr(newpacket->data+curbyte,msg, strlen(msg));
9de3ca7e	89
49c8a2fa	90	/*
	91	* Set the Request Acknowledge flag.
	92	*/
5b79dc93	93	if (flags & AIM_IMFLAGS_ACK) {
	94	curbyte += aimutil_put16(newpacket->data+curbyte,0x0003);
	95	curbyte += aimutil_put16(newpacket->data+curbyte,0x0000);
	96	}
49c8a2fa	97
	98	/*
	99	* Set the Autoresponse flag.
	100	*/
5b79dc93	101	if (flags & AIM_IMFLAGS_AWAY) {
	102	curbyte += aimutil_put16(newpacket->data+curbyte,0x0004);
	103	curbyte += aimutil_put16(newpacket->data+curbyte,0x0000);
	104	}
49c8a2fa	105
5b79dc93	106	newpacket->commandlen = curbyte;
5b79dc93	107	newpacket->lock = 0;
9de3ca7e	108
5b79dc93	109	aim_tx_enqueue(sess, newpacket);
49c8a2fa	110
9de3ca7e	111	#ifdef USE_SNAC_FOR_IMS
	112	{
	113	struct aim_snac_t snac;
	114
a25832e6	115	snac.id = sess->snac_nextid;
9de3ca7e	116	snac.family = 0x0004;
	117	snac.type = 0x0006;
	118	snac.flags = 0x0000;
	119
	120	snac.data = malloc(strlen(destsn)+1);
	121	memcpy(snac.data, destsn, strlen(destsn)+1);
	122
a25832e6	123	aim_newsnac(sess, &snac);
9de3ca7e	124	}
9de3ca7e	125
a25832e6	126	aim_cleansnacs(sess, 60); /* clean out all SNACs over 60sec old */
9de3ca7e	127	#endif
9de3ca7e	128
a25832e6	129	return (sess->snac_nextid++);
9de3ca7e	130	}
9de3ca7e	131
49c8a2fa	132	/*
	133	* It can easily be said that parsing ICBMs is THE single
	134	* most difficult thing to do in the in AIM protocol. In
	135	* fact, I think I just did say that.
	136	*
	137	* Below is the best damned solution I've come up with
	138	* over the past sixteen months of battling with it. This
	139	* can parse both away and normal messages from every client
	140	* I have access to. Its not fast, its not clean. But it works.
	141	*
	142	* We should also support at least minimal parsing of
	143	* Channel 2, so that we can at least know the name of the
	144	* room we're invited to, but obviously can't attend...
	145	*
	146	*/
a25832e6	147	int aim_parse_incoming_im_middle(struct aim_session_t *sess,
a25832e6	148	struct command_rx_struct *command)
9de3ca7e	149	{
26af6789	150	u_int i = 0,z;
9de3ca7e	151	rxcallback_t userfunc = NULL;
49c8a2fa	152	u_char cookie[8];
	153	int channel;
	154	struct aim_tlvlist_t *tlvlist;
26af6789	155	struct aim_userinfo_s userinfo;
49c8a2fa	156	u_short wastebits;
49c8a2fa	157
95d7332a	158	memset(&userinfo, 0x00, sizeof(struct aim_userinfo_s));
95d7332a	159
49c8a2fa	160	i = 10; /* Skip SNAC header */
49c8a2fa	161
9de3ca7e	162	/*
49c8a2fa	163	* Read ICBM Cookie. And throw away.
9de3ca7e	164	*/
49c8a2fa	165	for (z=0; z<8; z++,i++)
49c8a2fa	166	cookie[z] = command->data[i];
9de3ca7e	167
49c8a2fa	168	/*
	169	* Channel ID.
	170	*
	171	* Channel 0x0001 is the message channel. There are
	172	* other channels for things called "rendevous"
	173	* which represent chat and some of the other new
26af6789	174	* features of AIM2/3/3.5.
	175	*
	176	* Channel 0x0002 is the Rendevous channel, which
50443ea0	177	* is where Chat Invitiations and various client-client
50443ea0	178	* connection negotiations come from.
26af6789	179	*
49c8a2fa	180	*/
49c8a2fa	181	channel = aimutil_get16(command->data+i);
9de3ca7e	182	i += 2;
26af6789	183
	184	/*
	185	*
	186	*/
	187	if ((channel != 0x01) && (channel != 0x02))
9de3ca7e	188	{
49c8a2fa	189	printf("faim: icbm: ICBM received on an unsupported channel. Ignoring.\n (chan = %04x)", channel);
49c8a2fa	190	return 1;
9de3ca7e	191	}
9de3ca7e	192
49c8a2fa	193	/*
	194	* Source screen name.
	195	*/
	196	memcpy(userinfo.sn, command->data+i+1, (int)command->data[i]);
	197	userinfo.sn[(int)command->data[i]] = '\0';
	198	i += 1 + (int)command->data[i];
95d7332a	199
49c8a2fa	200	/*
26af6789	201	* Warning Level
49c8a2fa	202	*/
26af6789	203	userinfo.warnlevel = aimutil_get16(command->data+i); /* guess */
49c8a2fa	204	i += 2;
26af6789	205
	206	/*
	207	* Number of TLVs that follow. Not needed.
	208	*/
49c8a2fa	209	wastebits = aimutil_get16(command->data+i);
9de3ca7e	210	i += 2;
26af6789	211
49c8a2fa	212	/*
	213	* Read block of TLVs. All further data is derived
	214	* from what is parsed here.
	215	*/
	216	tlvlist = aim_readtlvchain(command->data+i, command->commandlen-i);
9de3ca7e	217
49c8a2fa	218	/*
26af6789	219	* From here on, its depends on what channel we're on.
49c8a2fa	220	*/
26af6789	221	if (channel == 1)
49c8a2fa	222	{
26af6789	223	u_int j = 0, y = 0, z = 0;
	224	char *msg = NULL;
	225	u_int icbmflags = 0;
	226	struct aim_tlv_t msgblocktlv, tmptlv;
	227	u_char *msgblock;
	228	u_short flag1,flag2;
95d7332a	229
26af6789	230	/*
	231	* Check Autoresponse status. If it is an autoresponse,
	232	* it will contain a second type 0x0004 TLV, with zero length.
	233	*/
	234	if (aim_gettlv(tlvlist, 0x0004, 2))
	235	icbmflags \|= AIM_IMFLAGS_AWAY;
	236
	237	/*
	238	* Check Ack Request status.
	239	*/
	240	if (aim_gettlv(tlvlist, 0x0003, 2))
	241	icbmflags \|= AIM_IMFLAGS_ACK;
	242
	243	/*
	244	* Extract the various pieces of the userinfo struct.
	245	*/
	246	/* Class. */
	247	if ((tmptlv = aim_gettlv(tlvlist, 0x0001, 1)))
	248	userinfo.class = aimutil_get16(tmptlv->value);
	249	/* Member-since date. */
	250	if ((tmptlv = aim_gettlv(tlvlist, 0x0002, 1)))
	251	{
	252	/* If this is larger than 4, its probably the message block, skip */
	253	if (tmptlv->length <= 4)
	254	userinfo.membersince = aimutil_get32(tmptlv->value);
	255	}
	256	/* On-since date */
	257	if ((tmptlv = aim_gettlv(tlvlist, 0x0003, 1)))
	258	userinfo.onlinesince = aimutil_get32(tmptlv->value);
	259	/* Idle-time */
	260	if ((tmptlv = aim_gettlv(tlvlist, 0x0004, 1)))
	261	userinfo.idletime = aimutil_get16(tmptlv->value);
	262	/* Session Length (AIM) */
	263	if ((tmptlv = aim_gettlv(tlvlist, 0x000f, 1)))
	264	userinfo.sessionlen = aimutil_get16(tmptlv->value);
	265	/* Session Length (AOL) */
	266	if ((tmptlv = aim_gettlv(tlvlist, 0x0010, 1)))
	267	userinfo.sessionlen = aimutil_get16(tmptlv->value);
	268
	269	/*
	270	* Message block.
	271	*
	272	* XXX: Will the msgblock always be the second 0x0002?
	273	*/
	274	msgblocktlv = aim_gettlv(tlvlist, 0x0002, 1);
	275	if (!msgblocktlv)
	276	{
	277	printf("faim: icbm: major error! no message block TLV found!\n");
	278	aim_freetlvchain(&tlvlist);
e6b05d80	279	return 1;
26af6789	280	}
	281
	282	/*
	283	* Extracting the message from the unknown cruft.
	284	*
	285	* This is a bit messy, and I'm not really qualified,
	286	* even as the author, to comment on it. At least
	287	* its not as bad as a while loop shooting into infinity.
	288	*
	289	* "Do you believe in magic?"
	290	*
	291	*/
	292	msgblock = msgblocktlv->value;
	293	j = 0;
	294
	295	wastebits = aimutil_get8(msgblock+j++);
	296	wastebits = aimutil_get8(msgblock+j++);
	297
	298	y = aimutil_get16(msgblock+j);
	299	j += 2;
	300	for (z = 0; z < y; z++)
	301	wastebits = aimutil_get8(msgblock+j++);
	302	wastebits = aimutil_get8(msgblock+j++);
	303	wastebits = aimutil_get8(msgblock+j++);
	304
	305	/*
	306	* Message string length, including flag words.
	307	*/
	308	i = aimutil_get16(msgblock+j);
	309	j += 2;
	310
	311	/*
	312	* Flag words.
	313	*
	314	* Its rumored that these can kick in some funky
	315	* 16bit-wide char stuff that used to really kill
	316	* libfaim. Hopefully the latter is no longer true.
	317	*
	318	* Though someone should investiagte the former.
	319	*
	320	*/
	321	flag1 = aimutil_get16(msgblock+j);
	322	j += 2;
	323	flag2 = aimutil_get16(msgblock+j);
	324	j += 2;
	325
	326	if (flag1 \|\| flag2)
	327	printf("faim: icbm: **warning: encoding flags are being used! {%04x, %04x}\n", flag1, flag2);
	328
	329	/*
	330	* Message string.
	331	*/
	332	i -= 4;
	333	msg = (char *)malloc(i+1);
	334	memcpy(msg, msgblock+j, i);
	335	msg[i] = '\0';
	336
	337	/*
	338	* Call client.
	339	*/
	340	userfunc = aim_callhandler(command->conn, 0x0004, 0x0007);
	341	if (userfunc)
	342	i = userfunc(sess, command, channel, &userinfo, msg, icbmflags, flag1, flag2);
	343	else
344	i = 0;
345
346	free(msg);
49c8a2fa	347	}
26af6789	348	else if (channel == 0x0002)
0c20631f	349	{
0c20631f	350	int rendtype;
26af6789	351	struct aim_tlv_t *block1;
	352	struct aim_tlvlist_t *list2;
	353	struct aim_tlv_t *tmptlv;
	354	int a;
26af6789	355
	356	/* Class. */
	357	if ((tmptlv = aim_gettlv(tlvlist, 0x0001, 1)))
	358	userinfo.class = aimutil_get16(tmptlv->value);
	359	/* On-since date */
	360	if ((tmptlv = aim_gettlv(tlvlist, 0x0003, 1)))
	361	userinfo.onlinesince = aimutil_get32(tmptlv->value);
	362	/* Idle-time */
	363	if ((tmptlv = aim_gettlv(tlvlist, 0x0004, 1)))
	364	userinfo.idletime = aimutil_get16(tmptlv->value);
	365	/* Session Length (AIM) */
	366	if ((tmptlv = aim_gettlv(tlvlist, 0x000f, 1)))
	367	userinfo.sessionlen = aimutil_get16(tmptlv->value);
	368	/* Session Length (AOL) */
	369	if ((tmptlv = aim_gettlv(tlvlist, 0x0010, 1)))
	370	userinfo.sessionlen = aimutil_get16(tmptlv->value);
	371
	372	/*
	373	* There's another block of TLVs embedded in the type 5 here.
	374	*/
	375	block1 = aim_gettlv(tlvlist, 0x0005, 1);
	376	if (!block1)
	377	return 1; /* major problem */
	378
	379	a = 0x1a; /* skip -- not sure what this information is! */
	380
0c20631f	381	/*
	382	* XXX: Ignore if there's no data, only cookie information.
	383	*
	384	* Its probably just an accepted invitation or something.
	385	*
	386	*/
	387	if (block1->length <= 0x1a)
26af6789	388	{
0c20631f	389	aim_freetlvchain(&tlvlist);
0c20631f	390	return 1;
26af6789	391	}
26af6789	392
0c20631f	393	list2 = aim_readtlvchain(block1->value+a, block1->length-a);
26af6789	394
0c20631f	395	if (aim_gettlv(list2, 0x0004, 1) /* start connection */ \|\|
	396	aim_gettlv(list2, 0x000b, 1) /* close conncetion */)
	397	{
	398	rendtype = 1; /* voice request */
	399
	400	/*
	401	* Call client.
	402	*/
	403	userfunc = aim_callhandler(command->conn, 0x0004, 0x0007);
	404	if (userfunc)
	405	i = userfunc(sess,
	406	command,
	407	channel,
	408	rendtype,
	409	&userinfo);
	410	else
	411	i = 0;
	412	}
	413	else
	414	{
	415	struct aim_chat_roominfo roominfo;
	416	char msg=NULL,encoding=NULL,*lang=NULL;
	417
	418	rendtype = 0; /* chat invite */
	419	if (aim_gettlv(list2, 0x2711, 1))
	420	{
	421	struct aim_tlv_t *nametlv;
	422
	423	nametlv = aim_gettlv(list2, 0x2711, 1);
	424	aim_chat_readroominfo(nametlv->value, &roominfo);
	425	}
	426
	427	if (aim_gettlv(list2, 0x000c, 1))
	428	msg = aim_gettlv_str(list2, 0x000c, 1);
	429
	430	if (aim_gettlv(list2, 0x000d, 1))
	431	encoding = aim_gettlv_str(list2, 0x000d, 1);
	432
	433	if (aim_gettlv(list2, 0x000e, 1))
	434	lang = aim_gettlv_str(list2, 0x000e, 1);
26af6789	435
0c20631f	436	/*
	437	* Call client.
	438	*/
	439	userfunc = aim_callhandler(command->conn, 0x0004, 0x0007);
	440	if (userfunc)
	441	i = userfunc(sess,
	442	command,
	443	channel,
	444	rendtype,
	445	&userinfo,
	446	&roominfo,
	447	msg,
	448	encoding?encoding+1:NULL,
	449	lang?lang+1:NULL);
	450	else
	451	i = 0;
26af6789	452
0c20631f	453	free(roominfo.name);
	454	free(msg);
	455	free(encoding);
	456	free(lang);
	457	}
26af6789	458	aim_freetlvchain(&list2);
26af6789	459	}
9de3ca7e	460
49c8a2fa	461	/*
	462	* Free up the TLV chain.
	463	*/
	464	aim_freetlvchain(&tlvlist);
26af6789	465
49c8a2fa	466
26af6789	467	return i;
49c8a2fa	468	}
	469
	470	/*
	471	* Not real sure what this does, nor does anyone I've talk to.
	472	*
	473	* Didn't use to send it. But now I think it might be a good
	474	* idea.
	475	*
	476	*/
a25832e6	477	u_long aim_seticbmparam(struct aim_session_t *sess,
a25832e6	478	struct aim_conn_t *conn)
49c8a2fa	479	{
5b79dc93	480	struct command_tx_struct *newpacket;
49c8a2fa	481	int curbyte;
49c8a2fa	482
5b79dc93	483	if(!(newpacket = aim_tx_new(0x0002, conn, 10+16)))
	484	return -1;
	485
	486	newpacket->lock = 1;
	487
	488	curbyte = aim_putsnac(newpacket->data, 0x0004, 0x0002, 0x0000, sess->snac_nextid);
	489	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
	490	curbyte += aimutil_put32(newpacket->data+curbyte, 0x00000003);
	491	curbyte += aimutil_put8(newpacket->data+curbyte, 0x1f);
	492	curbyte += aimutil_put8(newpacket->data+curbyte, 0x40);
	493	curbyte += aimutil_put8(newpacket->data+curbyte, 0x03);
	494	curbyte += aimutil_put8(newpacket->data+curbyte, 0xe7);
	495	curbyte += aimutil_put8(newpacket->data+curbyte, 0x03);
	496	curbyte += aimutil_put8(newpacket->data+curbyte, 0xe7);
	497	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
	498	curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000);
	499
	500	newpacket->lock = 0;
	501	aim_tx_enqueue(sess, newpacket);
a25832e6	502
	503	return (sess->snac_nextid++);
	504	}
	505
	506	int aim_parse_msgerror_middle(struct aim_session_t *sess,
	507	struct command_rx_struct *command)
	508	{
	509	u_long snacid = 0x000000000;
	510	struct aim_snac_t *snac = NULL;
	511	int ret = 0;
	512	rxcallback_t userfunc = NULL;
	513
	514	/*
	515	* Get SNAC from packet and look it up
	516	* the list of unrepliedto/outstanding
	517	* SNACs.
	518	*
	519	* After its looked up, the SN that the
	520	* message should've gone to will be
	521	* in the ->data element of the snac struct.
	522	*
	523	*/
	524	snacid = aimutil_get32(command->data+6);
	525	snac = aim_remsnac(sess, snacid);
	526
	527	if (!snac)
	528	{
	529	printf("faim: msgerr: got an ICBM-failed error on an unknown SNAC ID! (%08lx)\n", snacid);
	530	}
	531
	532	/*
	533	* Call client.
	534	*/
	535	userfunc = aim_callhandler(command->conn, 0x0004, 0x0001);
	536	if (userfunc)
	537	ret = userfunc(sess, command, (snac)?snac->data:"(UNKNOWN)");
	538	else
	539	ret = 0;
	540
	541	free(snac->data);
	542	free(snac);
49c8a2fa	543
a25832e6	544	return ret;
9de3ca7e	545	}
e6b05d80	546
e6b05d80	547