Quick question regarding SADP.....

[xmodpt]

Hello all and thank you for all the help you have provid me with.

Quick question...

How does SADP work?
How does it scans the network and it is able to find the cameras and not a PC or laptop?

Kind regards
Xmodpt

 

[alastairstevenson]

How does SADP work?
How does it scans the network and it is able to find the cameras and not a PC or laptop?

It sends a UDP inquiry packet to a multicast address and listens to the responses, interpreting and reporting those that identify as Hikvision.
This way it does not matter that the PC IP address is on a different IP segment than the responding devices, but they do need to be on the same wiring, ie not behind a routed interface.
Here is a sample response from an NVR. As you can see - it does give a fair bit of detail for nothing.

<?xml version="1.0" encoding="UTF-8" ?>.
<ProbeMatch>.<Uuid>377581D7-9F0B-4775-9DE0-89988682E405</Uuid>.
<Types>inquiry</Types>.
<DeviceType>41343</DeviceType>.
<DeviceDescription>DS-7816N-E2</DeviceDescription>.
<DeviceSN>DS-7816N-E21620150203AARR503146794WCVU</DeviceSN>.
<CommandPort>8000</CommandPort>.
<HttpPort>80</HttpPort>.
<MAC>c0-56-e3-3d-19-5b</MAC>.
<IPv4Address>192.168.1.211</IPv4Address>.
<IPv4SubnetMask>255.255.255.0</IPv4SubnetMask>.
<IPv4Gateway>192.168.1.1</IPv4Gateway>.
<IPv6Address>fe80::c256:e3ff:fe3d:195b</IPv6Address>.
<IPv6Gateway>fe80::4ff:97ff:fe67:3aa4</IPv6Gateway>.
<IPv6MaskLen>64</IPv6MaskLen>.
<DHCP>false</DHCP>.<AnalogChannelNum>0</AnalogChannelNum>.
<DigitalChannelNum>16</DigitalChannelNum>.
<SoftwareVersion>V3.4.91build 161220</SoftwareVersion>.
<DSPVersion>V5.0, build 161208</DSPVersion>.
<BootTime>2017-01-07 16:15:58</BootTime>.
<OEMInfo>N/A</OEMInfo>.<Activated>true</Activated>.
<PasswordResetAbility>true</PasswordResetAbility>.
<SyncIPCPassword>true</SyncIPCPassword>.
<PasswordResetModeSecond>true</PasswordResetModeSecond>.
<DeviceLock>true</DeviceLock>.
<SupportGUID>true</SupportGUID>.
<SupportSecurityQuestion>true</SupportSecurityQuestion>.
</ProbeMatch>.

 

[xmodpt]

Thank you for your reply.

So, it is possible to develop an app for android that does the same thing....


Xmodpt

 

[Camit]

It sends a UDP inquiry packet to a multicast address and listens to the responses, interpreting and reporting those that identify as Hikvision.
This way it does not matter that the PC IP address is on a different IP segment than the responding devices, but they do need to be on the same wiring, ie not behind a routed interface.
Here is a sample response from an NVR. As you can see - it does give a fair bit of detail for nothing.

<?xml version="1.0" encoding="UTF-8" ?>.
<ProbeMatch>.<Uuid>377581D7-9F0B-4775-9DE0-89988682E405</Uuid>.
<Types>inquiry</Types>.
<DeviceType>41343</DeviceType>.
<DeviceDescription>DS-7816N-E2</DeviceDescription>.
<DeviceSN>DS-7816N-E21620150203AARR503146794WCVU</DeviceSN>.
<CommandPort>8000</CommandPort>.
<HttpPort>80</HttpPort>.
<MAC>c0-56-e3-3d-19-5b</MAC>.
<IPv4Address>192.168.1.211</IPv4Address>.
<IPv4SubnetMask>255.255.255.0</IPv4SubnetMask>.
<IPv4Gateway>192.168.1.1</IPv4Gateway>.
<IPv6Address>fe80::c256:e3ff:fe3d:195b</IPv6Address>.
<IPv6Gateway>fe80::4ff:97ff:fe67:3aa4</IPv6Gateway>.
<IPv6MaskLen>64</IPv6MaskLen>.
<DHCP>false</DHCP>.<AnalogChannelNum>0</AnalogChannelNum>.
<DigitalChannelNum>16</DigitalChannelNum>.
<SoftwareVersion>V3.4.91build 161220</SoftwareVersion>.
<DSPVersion>V5.0, build 161208</DSPVersion>.
<BootTime>2017-01-07 16:15:58</BootTime>.
<OEMInfo>N/A</OEMInfo>.<Activated>true</Activated>.
<PasswordResetAbility>true</PasswordResetAbility>.
<SyncIPCPassword>true</SyncIPCPassword>.
<PasswordResetModeSecond>true</PasswordResetModeSecond>.
<DeviceLock>true</DeviceLock>.
<SupportGUID>true</SupportGUID>.
<SupportSecurityQuestion>true</SupportSecurityQuestion>.
</ProbeMatch>.

So if you turn multicast off in the camera settings,I'm guessing this feature will no longer work is that right? Is there any security risks leaving it turn on ?

 

[xmodpt]

i don't see why you should turn it off.
If you have a system in your network, the best thing if to set it in a different VLAN to avoid any problems there for the multicast can stay on for maintenance purpose for example.