SNAC(01,03)  SRV_FAMILIES  

This is the first snac in protocol negotiation sequence. Client shouldn't use families not listed in this SNAC. See also known families list. So if your client use SNAC(13) family and server SNAC(01,03) doesn't contain it - your client should popup "server error" message when user want's to change server-stored information (SSI).

 00 01   word   SNAC family
 00 03   word   SNAC subtype
 00 00   word   SNAC flags
 xx xx xx xx   dword   SNAC request-id
 xx xx   word   family number #1
 ...    ...    ...
 xx xx   word   family number #n

Example SNAC dump with flap header:

  2A 02 3D FE 00 22 00 01  00 03 00 00 82 95 E5 7A *.=..".........z
  00 01 00 02 00 03 00 04  00 06 00 08 00 09 00 0A ................
  00 0B 00 0C 00 13 00 15                          ........


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