protocol :
Connect to the unix socket.
Sent request, answer response.
close unix socket connection.
Request format :
1st byte : request type
1 - type
2 - USN (unique id)
3 - everything
4 - submit service (see below)
n bytes : string length : 1 byte if < 128 else the upper bit indicate that
one additional byte should be read, etc. (see codelength.h)
n bytes = string
Response format :
1st byte : number of services/devices
For each service/device :
URL :
n bytes string length
n bytes = Location string
ST:
n bytes string length
n bytes = type string
USN:
n bytes string length
n bytes = identifier string
request type 4 = submit service
1st byte = 4
(k,n) bytes : length and string "ST" (service type)
(k,n) bytes : length and string "USN"
(k,n) bytes : length and string "Server"
(k,n) bytes : length and string "Location"
No answer