Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

NicheStack TCP Client not working with some servers

I've been trying to talk to an Arecont IP camera via a TCP socket client on a BeMicro Nios2 app. The connection to the camera always failed to establish, although it was ok if I substituted t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Ok, here's the WireShark capture of the ARP reply:

Ethernet II, Src: ArecontV_06:cc:49 (00:1a:07:06:cc:49), Dst: IntelCor_26:63:f9 (00:15:17:26:63:f9)

Destination: IntelCor_26:63:f9 (00:15:17:26:63:f9)

Address: IntelCor_26:63:f9 (00:15:17:26:63:f9)

.... ...0 .... .... .... .... = IG bit: Individual address (unicast)

.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)

Source: ArecontV_06:cc:49 (00:1a:07:06:cc:49)

Address: ArecontV_06:cc:49 (00:1a:07:06:cc:49)

.... ...0 .... .... .... .... = IG bit: Individual address (unicast)

.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)

Type: ARP (0x0806)

Trailer: 000000000000000000000000000000000000

Address Resolution Protocol (reply/gratuitous ARP)

Hardware type: Ethernet (1)

Protocol type: IP (0x0800)

Hardware size: 6

Protocol size: 4

Opcode: reply (2)

[Is gratuitous: True]

Sender MAC address: ArecontV_06:cc:49 (00:1a:07:06:cc:49)

Sender IP address: 172.18.11.10 (172.18.11.10)

Target MAC address: IntelCor_26:63:f9 (00:15:17:26:63:f9)

Target IP address: 172.18.11.10 (172.18.11.10)

Note the 'Sender IP address' = 'Target IP address' in the ARP reply from the camera.