Changes between Initial Version and Version 1 of Ticket #1229


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Timestamp:
Apr 20, 2011 9:12:54 AM (10 years ago)
Author:
bennylp
Comment:

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  • Ticket #1229

    • Property Summary changed from Delay for up to four (4) seconds when using STUN on certain iPhone systems (thanks Guy Zelkha for the report) to Bug in STUN resolver causes delay for 4 seconds if packet is lost. Also add other enhancements to the resolver (thanks Guy Zelkha for the report)
  • Ticket #1229 – Description

    initial v1  
    1 Delays for up to four (4) seconds are observed with STUN on certain iPhone systems. 
     1Bug fixes and enhancements to the simple STUN resolver (in PJLIB-UTIL, not PJNATH) 
    22 
    3 Sample: iPhone OS-3.2/arm/iOS-SDK-4.1 
    4 {{{ 
    5 18:04:53.291    stunresolve  RX 88 bytes STUN message from 212.64.151.160:4478: 
    6 --- begin STUN message --- 
    7 STUN Binding success response 
    8  Hdr: length=68, magic=2112a442, tsx_id=fbf145dab360c9f000017327 
    9  Attributes: 
    10   MAPPED-ADDRESS: length=8, IPv4 addr=109.186.67.85:61160 
    11   SOURCE-ADDRESS: length=8, IPv4 addr=212.64.151.160:4478 
    12   CHANGED-ADDRESS: length=8, IPv4 addr=46.38.162.185:4479 
    13   Attr 0x8020: length=8 
    14   SOFTWARE: length=16, value="Vovida.org 0.96" 
    15 --- end of STUN message --- 
     3Bug: 
     4 1. Bug: if UDP packet is lost, the resolver will wait until all retransmissions are done, which means 4 seconds delay. 
    165 
    17 18:04:53.291    stunresolve  STUN mapped address found/changed: 109.186.67.85:61160 
    18 18:04:53.299   pjsua_core.c  STUN resolution success, using 212.64.151.160:4478, address is 212.64.151.160:4478 
    19 18:04:53.299 stuntsx0x87655  STUN client transaction destroyed 
    20 18:04:54.826  stun_simple.c  Warning: unknown attr type 8020 in attr 3. Attribute was ignored. 
    21 18:04:54.826  stun_simple.c  Warning: unknown attr type 8022 in attr 4. Attribute was ignored. 
    22 18:04:54.828  stun_simple.c  Warning: unknown attr type 8020 in attr 3. Attribute was ignored. 
    23 18:04:54.829  stun_simple.c  Warning: unknown attr type 8022 in attr 4. Attribute was ignored. 
    24 18:04:57.303   pjsua_core.c  SIP UDP socket reachable at 109.186.67.85:1024 
    25 18:04:57.305    udp0x869000  SIP UDP transport started, published address is 109.186.67.85:1024 
    26 }}} 
     6Enhancements: 
     7 1. Allow caller to specify only 1 STUN server, for faster result. 
     8 1. If both servers point to the same address, only one will be used. 
     9 1. Decrease retransmission delay from 1000 ms to 500 ms for more responsive result. 
     10 1. Reduce memory consumption (from 1024 to 400 bytes). 
     11