Presence Code Python

Extremely incomplete example of how to log an avatar in and establish a presence. So far it only sends enough to temporarily show in-world. More to come....

N.B.: the packet ID number of a zero encoded pack is encoded and must be decoded before you can know what packet you are actually dealing with (Thanks John Hurliman/Eddy Stryker).

(based on a sample login script found at libsl login.)

<python>from struct import * from zerocode import * import md5 import xmlrpclib import sys

import re import httplib, urllib from urlparse import urlparse import socket, sys, time import uuid from makepacketdict import makepacketdict

mypacketdictionary = {} outputstring = ack_need_list = []

logoutputflag = True

if logoutputflag:

   temp = sys.stdout
   sys.stdout =open('alog.txt','w')

def login(first, last, passwd, mac):

 passwd_md5 = '$1$' + md5.new(passwd).hexdigest()

 uri = 'http://127.0.0.1'
 uri = 'https://login.agni.lindenlab.com/cgi-bin/login.cgi'
 s = xmlrpclib.ServerProxy(uri)

 login_details = {
   'first': first,
   'last': last,
   'passwd': passwd_md5,
   'start': 'last',
   'major': '1',
   'minor': '18',
   'patch': '5',
   'build': '3',
   'platform': 'Win',
   'mac': mac,
   'options': [],
   'user-agent': 'sl.py 0.1',
   'id0': ,
   'agree_to_tos': ,
   'viewer_digest': '09d93740-8f37-c418-fbf2-2a78c7b0d1ea'
 }
 results = s.login_to_simulator(login_details)
 print results
 
 return results

def get_caps(results,cap_key, request_keys):

 _, netloc, path, _, _, _ = urlparse(results[cap_key])

 params = "<llsd><array><string>"+ request_keys[0]+"</string></array></llsd>"
 headers = {"content-type": "application/xml"}
 conn = httplib.HTTPSConnection(netloc)

 conn.request("POST", path, params, headers)
 response = conn.getresponse()

 data = response.read()
 conn.close()
 return data
 

def ExtractCap(cap_result):

 trim_xml = re.compile(r"<key>([a-zA-Z_]+)</key><string>([a-zA-Z_:/0-9-.]+)</string>")
 new_key = trim_xml.search(cap_result).group(1)
 new_cap = trim_xml.search(cap_result).group(2)
 return new_key, new_cap
 

def scheduleacknowledgemessage(data):

   if not (ord(data[0])&0x40):
       print "OOOPS! Got asked to ack a message that shouldn't be acked"
       
       return
   else:
       ID = data[1:5]
       if (ord(data[0])&0x40) & 0x80: ID = zero_decode_ID(ID)
       ack_need_list.append(unpack(">L",ID)[0])
       #ack_need_list.append(unpack(">L",data[1:5])[0])
       #print "ack needed","insdie schedule ack_need_list", ack_need_list
       

   return

def packacks():

   acksequence = ""
   for msgnum in ack_need_list:
       acksequence = acksequence + pack(">L", msgnum)
   
   
   return acksequence
       

1. def sendacks():

#   if len(ack_need_list)>0:
       

def sendAgentUpdate(sock, port, host, currentsequence, result):

1. AgentUpdate

   tempacks = packacks()
   del ack_need_list[0:]
   
   if tempacks == "": 
       flags = 0x00
   else:
       flags = 0x10

   #print "tempacks is:", ByteToHex(tempacks)  
       
   packed_data_header = pack('>BLB', flags,currentsequence,0x00)
   packed_data_message_ID = pack('>B',0x04)
   packed_data_ID = uuid.UUID(result["agent_id"]).bytes + uuid.UUID(result["session_id"]).bytes
   packed_data_QuatRots = pack('>ffff', 0.0,0.0,0.0,0.0)+pack('>ffff', 0.0,0.0,0.0,0.0)  
   packed_data_State = pack('>B', 0x00)
   packed_data_Camera = pack('>fff', 0.0,0.0,0.0)+pack('>fff', 0.0,0.0,0.0)+pack('>fff', 0.0,0.0,0.0)+pack('>fff', 0.0,0.0,0.0)
   packed_data_Flags = pack('>fLB', 0.0,0x00,0x00)

   encoded_packed_data = zero_encode(packed_data_message_ID+packed_data_ID+packed_data_QuatRots+packed_data_State+packed_data_Camera+packed_data_Flags)

   packed_data = packed_data_header + encoded_packed_data+tempacks

  # print "sending AgentUpdate to server",ByteToHex(packed_data_header+zero_decode(encoded_packed_data)+ tempacks)
   
   sock.sendto(packed_data, (host, port))
   return

def establishpresence(host, port, circuit_code):

   sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

1. Sending packet UseCircuitCode <-- Inits the connection to the sim.

   data = pack('>BLBL',0x00,0x01,00,0xffff0003) + pack('<L',circuit_code) + uuid.UUID(result["session_id"]).bytes+uuid.UUID(result["agent_id"]).bytes
   sock.sendto(data, (host, port))

1. ISending packet CompleteAgentMovement <-- establishes the agent's presence

   data = pack('>BLBL',0x00,0x02,00,0xffff00f9) + uuid.UUID(result["agent_id"]).bytes + uuid.UUID(result["session_id"]).bytes + pack('<L', circuit_code)
   sock.sendto(data, (host, port))

   sendAgentUpdate(sock, port, host, 3, result)

   buf = 100
   i = 0
   trusted_count = 0
   ackable = 0
   trusted_and_ackable = 0
   ack_need_list_changed = False
   seqnum = 3
   while 1:
       if ack_need_list_changed:
           ack_need_list_changed = False
           seqnum = seqnum + 1
           sendAgentUpdate(sock, port, host, seqnum, result)
           
       #sendacks()
       i = i + 1
       data,addr = sock.recvfrom(buf)
       
       if not data:
           print "Client has exited!"
           
           break
       else:
           test =  ByteToHex(data).split()
           #print test
           ID = data[6:12]
           #print "ID =", ByteToHex(ID) 
           if (ord(data[0])&0x80): ID = zero_decode_ID(data[6:12])
           #print "ID =", ByteToHex(ID) 
           #print "ID =", unpack(">L", ID[:4])
           if ID[0] == '\xFF':
               if ID[1] == '\xFF':
                   if ID[2] == '\xFF':
                       myentry = mypacketdictionary[("Fixed" , int("0x"+ByteToHex(ID[2:4]).replace(' ', ),16))]
                       if (ord(data[0])&0x40): 
                           scheduleacknowledgemessage(data); 
                           ack_need_list_changed = True
                           print "Message #", i,"Flags: 0x" + test[0], myentry,  "sequence #", unpack(">L",data[1:5]), "ack needed"
                           
                       #if myentry[1] == "Trusted": trusted_count = trusted_count +1;print "number of trusted messages =", trusted_count
                       #if (ord(data[0])&0x40) and (myentry[1] == "Trusted"): trusted_and_ackable = trusted_and_ackable + 1; print "trusted_and_ackable =", trusted_and_ackable
                       #if (ord(data[0])&0x40): ackable = ackable + 1; print "number of ackable messages = ", ackable
                   else:
                       myentry = mypacketdictionary[("Low",int("0x"+ByteToHex(ID[2:4]).replace(' ', ),16))]
                       if (ord(data[0])&0x40): 
                           scheduleacknowledgemessage(data); 
                           ack_need_list_changed = True
                       print "Message #", i,"Flags: 0x" + test[0], myentry,   "sequence #", unpack(">L",data[1:5])
                       
                       #if myentry[1] == "Trusted": trusted_count = trusted_count +1;print "number of trusted messages =", trusted_count
                       #if (ord(data[0])&0x40) and (myentry[1] == "Trusted"): trusted_and_ackable = trusted_and_ackable + 1; print "trusted_and_ackable =", trusted_and_ackable
                      #if (ord(data[0])&0x40): ackable = ackable + 1; print "number of ackable messages = ", ackable
               else:
                   myentry = mypacketdictionary[("Medium", int("0x"+ByteToHex(ID[1:2]).replace(' ', ),16))]
                   if (ord(data[0])&0x40): 
                       scheduleacknowledgemessage(data); 
                       ack_need_list_changed = True
                   print "Message #", i,"Flags: 0x" + test[0], myentry,  "sequence #", unpack(">L",data[1:5])
                   
                   #if myentry[1] == "Trusted": trusted_count = trusted_count +1;print "number of trusted messages =", trusted_count
                   #if (ord(data[0])&0x40) and (myentry[1] == "Trusted"): trusted_and_ackable = trusted_and_ackable + 1; print "trusted_and_ackable =", trusted_and_ackable
                   #if (ord(data[0])&0x40): ackable = ackable + 1; print "number of ackable messages = ", ackable
           else:
               myentry = mypacketdictionary[("High", int("0x"+ByteToHex(ID[0]), 16))]
               if (ord(data[0])&0x40): 
                   scheduleacknowledgemessage(data); 
                   ack_need_list_changed = True
               print "Message #", i,"Flags: 0x" + test[0], myentry,   "sequence #", unpack(">L",data[1:5])
               
               #if myentry[1] == "Trusted": trusted_count = trusted_count +1;print "number of trusted messages =", trusted_count
               #if (ord(data[0])&0x40) and (myentry[1] == "Trusted"): trusted_and_ackable = trusted_and_ackable + 1; print "trusted_and_ackable =",  trusted_and_ackable
               #if (ord(data[0])&0x40): ackable = ackable + 1; print "number of ackable messages = ", ackable
   sock.close()
   print "final number of trusted messages =", trusted_count
   
   return

result = login("first", "last", "password", MAC)

mypacketdictionary = makepacketdict()

myhost = result["sim_ip"] myport = result["sim_port"] mycircuit_code = result["circuit_code"]

establishpresence(myhost, myport, mycircuit_code)

1. cap_out = get_caps(result,"seed_capability", ["ChatSessionRequest"])

</python>