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Zeroconf on iOS
merpay Tech Talk #1
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About me
• Software Engineer at merpay
• Twitter : @_natpenguin
• GitHub : natpenguin
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Agenda
• What is the Zeroconf?
• Coding on iOS
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Zeroconf
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Zero Configuration Networking
Zeroconf
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Zeroconf
connecting…
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Zeroconf
connected!
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Zeroconf
connected!
No needed human operation
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Zeroconf
• To provide IP address
• To automatically resolve the host name
• To automatically distribute the host name
• To find services
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History
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AppleTalk
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AppleTalk
1984
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1984
#
$
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Protocol
AppleTalk Address Resolution Protocol / AppleTalk
Address Resolution Protocol / Datagram Delivery
Protocol
/FUXPSL
Transport
4FTTJPO
1SFTFOUBUJPO
"QQMJDBUJPO
Routing Table Maintenance Protocol / AppleTalk Echo Protocol /
Name Binding Protocol / AppleTalk Transaction Protocol /
AppleTalk Update-Based Routing Protocol
AppleTalk Filing Protocol
Zone Information Protocol / Printer Access Protocol /
AppleTalk Session Protocol / AppleTalk Data Stream
Protocol
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Problem
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Load
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Problem on AppleTalk
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Problem on AppleTalk
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TCP/IP
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TCP/IP
AppleTalk
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AppleTalk
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Bonjour
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Bonjour
• Instead of AppleTalk
• Resolved the problem of performance
• Implementation on TCP/IP
• AirPrint / AirPlay(AirTunes)
• Only local network
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Coding
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Bonjour API
• To provide IP address
• To automatically resolve the host name
• To automatically distribute the host name
• To find services
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Bonjour API
• To provide IP address
• To automatically resolve the host name
• To automatically distribute the host name
• To find services
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Coding
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Server
NetService
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Server
let domain = "local."
let type = "_awesome._tcp."
let name = "Awesome Service"
let port: Int32 = 10000
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Server
let domain = "local."
let type = "_awesome._tcp."
let name = "Awesome Service"
let service = NetService(domain: domain,
type: type,
name: name,
port: port)
let port: Int32 = 10000
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Server
let domain = "local."
let type = "_awesome._tcp."
let name = "Awesome Service"
service.publish()
let service = NetService(domain: domain,
type: type,
name: name,
port: port)
let port: Int32 = 10000
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https://www.iana.org/assignments/
service-names-port-numbers/
service-names-port-numbers.xhtml
Document of Type
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Client
NetServiceBrowser
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Client
let domain = "local."
let type = "_awesome._tcp."
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Client
let domain = "local."
let type = "_awesome._tcp."
browser.searchForServices(ofType: type, inDomain: domain)
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Client
browser.searchForServices(ofType: type, inDomain: domain)
func netServiceBrowser(_ browser: NetServiceBrowser,
didFind service: NetService,
moreComing: Bool)
let domain = "local."
let type = "_awesome._tcp."
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Client
browser.searchForServices(ofType: type, inDomain: domain)
func netServiceBrowser(_ browser: NetServiceBrowser,
didFind service: NetService,
moreComing: Bool)
let domain = "local."
let type = "_awesome._tcp."
browser.delegate = self
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Client
extension ViewController: NetServiceBrowserDelegate {
func netServiceBrowser(_ browser: NetServiceBrowser,
didFind service: NetService,
moreComing: Bool) {
service.resolve(withTimeout: 10.0)
}
}
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Client
func netServiceDidResolveAddress(_ sender: NetService)
extension ViewController: NetServiceBrowserDelegate {
func netServiceBrowser(_ browser: NetServiceBrowser,
didFind service: NetService,
moreComing: Bool) {
service.resolve(withTimeout: 10.0)
}
}
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Client
func netServiceDidResolveAddress(_ sender: NetService)
extension ViewController: NetServiceBrowserDelegate {
func netServiceBrowser(_ browser: NetServiceBrowser,
didFind service: NetService,
moreComing: Bool) {
service.delegate = self
service.resolve(withTimeout: 10.0)
}
}
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Client more
BSD Socket CFSocket NSStream
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https://developer.apple.com/
documentation/foundation/
netservice
Document of NetService
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Command
$ dns-sd -B
$ dns-sd -L
$ dns-sd -G
$ dns-sd -H
Browsing
Resolving a service instance
Getting IP Address
Help
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Command
$ dns-sd -B _printer._tcp
Browsing a printer service
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Command
$ dns-sd -B _printer._tcp
Browsing a printer service
Browsing for _printer._tcp
DATE: ---Mon 20 Aug 2018---
3:21:58.151 ...STARTING...
Timestamp A/R Flags if Domain Service Type Instance Name
3:21:58.151 Add 2 8 local. _printer._tcp. Printer Service
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iOS12
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Network.framework
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Network.framework
let name = "Awesome Service"
let type = "_awesome._tcp."
let domain = "local."
let parameters = NWParameters.tcp
let port = NWEndpoint.Port(integerLiteral: 10000)
listener.service = NWListener.Service(name: name,
type: type,
domain: domain)
guard let listener = try? NWListener(using: parameters,
on: port) else {
fatalError("Listener can't be initialized")
}
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Android
https://github.com/mannodermaus/
RxBonjour
https://github.com/andriydruk/
RxDNSSD
https://github.com/HQarroum/
android-mdns
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Paradigm
Foo
Foo
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Paradigm
Foo
Foo
Zeroconf
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Paradigm
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Paradigm
Zeroconf
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Let’s enjoy