EthernetENC
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Networking-for-Arduino
Not receiving DHCP Offer Packet
I've just tried to use the EthernetENC library with the DHCP Address Printer example, and get the following output:
Initialize Ethernet with DHCP:
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
udp beginPacket, rip: 255.255.255.255, port: 67
udp, uip_poll preparing packet to send: 1, size: 325
udp, uip_packet to send: 0
Failed to configure Ethernet using DHCP
But I can see in Wireshark that the module is sending it's DHCP Discover, and the Router is responding with a DHCP Offer.
No. Time Source Destination Protocol Length Info
113 5.342738 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4a5
154 7.345124 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4a5
190 9.347130 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4a6
191 9.347631 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4a6
221 13.404441 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4a7
222 13.404441 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4a7
246 17.459337 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4a8
247 17.459797 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4a8
293 21.515242 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4a9
294 21.525351 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4a9
303 25.571324 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4aa
304 25.571758 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4aa
316 29.627390 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4ab
317 29.628571 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4ab
380 33.683590 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4ac
381 33.683994 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4ac
406 37.739906 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4ad
407 37.739906 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4ad
451 41.795579 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4ae
452 41.796027 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4ae
599 45.852460 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4af
600 45.852460 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4af
5270 49.908088 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4b0
5271 49.908334 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4b0
5368 53.964271 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4b1
5369 53.964271 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4b1
5457 58.020850 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4b2
5458 58.020850 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4b2
I also check in the DHCP.c file. It seems that _dhcpUdpSocket.parsePacket() in DhcpClass::parseDHCPResponse never get's a packet.
I also just checked the same sketch with the UIPEthernet library. With it, it seems to work...
Initialize Ethernet with DHCP:
ENC28J60::init DEBUG:csPin = 42
ENC28J60::init DEBUG:miso = 44
ENC28J60::init DEBUG:mosi = 45
ENC28J60::init DEBUG:sck = 43
ENC28J60::init DEBUG:Use SPI lib SPI.begin()
ENC28J60::init INFO: Chip erevid=6 initialization completed.
DhcpClass::beginWithDHCP(uint8_t *mac) DEBUG_V1:Function started
DhcpClass::reset_DHCP_lease(void) DEBUG_V1:Function started
DhcpClass::request_DHCP_lease(void) DEBUG_V1:Function started
DhcpClass::presend_DHCP(void) DEBUG_V1:Function started (Empty function)
DhcpClass::request_DHCP_lease(void) DEBUG_V1:dhcp_state=STATE_DHCP_START -> send_DHCP_MESSAGE DHCP_DISCOVER
DhcpClass::send_DHCP_MESSAGE(uint8_t messageType, uint16_t secondsElapsed) DEBUG_V1:Function started
UIPUDP::beginPacket DEBUG:udp beginPacket, rip: 255.255.255.255, port: 67
DhcpClass::printByte(char * buf, uint8_t n ) DEBUG_V1:Function started
DhcpClass::printByte(char * buf, uint8_t n ) DEBUG_V1:Function started
DhcpClass::printByte(char * buf, uint8_t n ) DEBUG_V1:Function started
uipudp_appcall(void) DEBUG:udp, uip_poll preparing packet to send: 1, size: 325
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_buf[34-42]: CE02
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_packet(1)[42-317]: 71B3
UIPEthernetClass::network_send() DEBUG:uip_packet: 1, hdrlen: 42
Enc28J60Network::sendPacket(memhandle handle) DEBUG:sendPacket(1) [801-93E]: 0 FF FF FF FF FF FF 0 AA BB CC DE 2 8 0 45 0 1 2F 0 1 0 0 40 11 79 BE 0 0 0 0 FF FF FF FF 0 44 0 43 1 1B 4C 8E 1 1 6 0 0 0 4 A4 0 0 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 AA BB CC DE 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 82 53 63 35 1 1 3D 7 1 0 AA BB CC DE 2 C C 45 4E 43 32 38 4A 43 43 44 45 30 32 37 6 1 3 6 F 3A 3B FF
UIPUDP::_send() DEBUG:udp, uip_packet to send: 0
DhcpClass::parseDHCPResponse(uint32_t& transactionId) DEBUG_V1:Function started
Enc28J60Network::receivePacket(void) DEBUG:receivePacket [6-254], next: 258, stat: C0, Packet count: 1 -> OK
Enc28J60Network::receivePacket(void) DEBUG: rxstat OK. receivePkt.size=590
UIPEthernetClass::tick() DEBUG:receivePacket: 255
UIPEthernetClass::tick() DEBUG:readPacket type IP, uip_len: 590
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_buf[34-42]: DC94
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_packet(255)[42-590]: FFFF
uipudp_appcall(void) DEBUG:udp, uip_newdata received packet: 1, size: 548
UIPEthernetClass::tick() DEBUG:freeing packet: 255
Enc28J60Network::setERXRDPT(void) DEBUG:Set actnextPacketPtr:257
UIPUDP::parsePacket(void) DEBUG:udp parsePacket received packet: 1, size: 548
MemoryPool::freeBlock(memhandle handle) WARNING: Don't free NOBLOCK handle
DhcpClass::request_DHCP_lease(void) DEBUG_V1:dhcp_state=STATE_DHCP_DISCOVER,messageType=DHCP_OFFER -> send_DHCP_MESSAGE DHCP_REQUEST
DhcpClass::send_DHCP_MESSAGE(uint8_t messageType, uint16_t secondsElapsed) DEBUG_V1:Function started
UIPUDP::beginPacket DEBUG:udp beginPacket, rip: 255.255.255.255, port: 67
DhcpClass::printByte(char * buf, uint8_t n ) DEBUG_V1:Function started
DhcpClass::printByte(char * buf, uint8_t n ) DEBUG_V1:Function started
DhcpClass::printByte(char * buf, uint8_t n ) DEBUG_V1:Function started
uipudp_appcall(void) DEBUG:udp, uip_poll preparing packet to send: 1, size: 337
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_buf[34-42]: E602
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_packet(1)[42-329]: 549F
UIPEthernetClass::network_send() DEBUG:uip_packet: 1, hdrlen: 42
Enc28J60Network::sendPacket(memhandle handle) DEBUG:sendPacket(1) [801-94A]: 0 FF FF FF FF FF FF 0 AA BB CC DE 2 8 0 45 0 1 3B 0 2 0 0 40 11 79 B1 0 0 0 0 FF FF FF FF 0 44 0 43 1 27 60 AB 1 1 6 0 0 0 4 A4 0 0 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 AA BB CC DE 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 82 53 63 35 1 3 3D 7 1 0 AA BB CC DE 2 C C 45 4E 43 32 38 4A 43 43 44 45 30 32 32 4 C0 A8 0 70 36 4 C0 A8 0 1 37 6 1 3 6 F 3A 3B FF
UIPUDP::_send() DEBUG:udp, uip_packet to send: 0
DhcpClass::parseDHCPResponse(uint32_t& transactionId) DEBUG_V1:Function started
Enc28J60Network::receivePacket(void) DEBUG:receivePacket [25E-2B4], next: 2B8, stat: C0, Packet count: 2 -> OK
Enc28J60Network::receivePacket(void) DEBUG: rxstat OK. receivePkt.size=86
UIPEthernetClass::tick() DEBUG:receivePacket: 255
UIPEthernetClass::tick() DEBUG:readPacket type IP, uip_len: 86
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_buf[34-42]: 7D1A
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_packet(255)[42-86]: FFFF
UIPEthernetClass::tick() DEBUG:freeing packet: 255
Enc28J60Network::setERXRDPT(void) DEBUG:Set actnextPacketPtr:2B7
Enc28J60Network::receivePacket(void) DEBUG:receivePacket [2BE-50C], next: 510, stat: C0, Packet count: 1 -> OK
Enc28J60Network::receivePacket(void) DEBUG: rxstat OK. receivePkt.size=590
UIPEthernetClass::tick() DEBUG:receivePacket: 255
UIPEthernetClass::tick() DEBUG:readPacket type IP, uip_len: 590
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_buf[34-42]: DC91
UIPEthernetClass::upper_layer_chksum(uint8_t proto) DEBUG:uip_packet(255)[42-590]: FFFF
uipudp_appcall(void) DEBUG:udp, uip_newdata received packet: 1, size: 548
UIPEthernetClass::tick() DEBUG:freeing packet: 255
Enc28J60Network::setERXRDPT(void) DEBUG:Set actnextPacketPtr:50F
UIPUDP::parsePacket(void) DEBUG:udp parsePacket received packet: 1, size: 548
MemoryPool::freeBlock(memhandle handle) WARNING: Don't free NOBLOCK handle
DhcpClass::request_DHCP_lease(void) DEBUG_V1:dhcp_state=STATE_DHCP_REQUEST,messageType=DHCP_ACK
MemoryPool::freeBlock(memhandle handle) WARNING: Don't free NOBLOCK handle
MemoryPool::freeBlock(memhandle handle) WARNING: Don't free NOBLOCK handle
MemoryPool::freeBlock(memhandle handle) WARNING: Don't free NOBLOCK handle
DhcpClass::getLocalIp(void) DEBUG_V1:Function started
DhcpClass::getDnsServerIp(void) DEBUG_V1:Function started
DhcpClass::getGatewayIp(void) DEBUG_V1:Function started
DhcpClass::getSubnetMask(void) DEBUG_V1:Function started
My IP address: 192.168.0.112
No. Time Source Destination Protocol Length Info
17499 444.634012 0.0.0.0 255.255.255.255 DHCP 317 DHCP Discover - Transaction ID 0x4a4
17500 444.634462 192.168.0.1 255.255.255.255 DHCP 590 DHCP Offer - Transaction ID 0x4a4
17502 444.955735 0.0.0.0 255.255.255.255 DHCP 329 DHCP Request - Transaction ID 0x4a4
17503 444.955735 192.168.0.1 255.255.255.255 DHCP 590 DHCP ACK - Transaction ID 0x4a4
yes. EthernetENC requests the DHCP response to be send as unicast, not as broadcast, because broadcasts are filter out (except of ARP). https://github.com/jandrassy/EthernetENC/wiki/Limitations
Ah I see. Adding | ERXFCON_BCEN makes it work indeed. Can this be added as an define option maybe?
Ah I see. Adding
| ERXFCON_BCENmakes it work indeed. Can this be added as an define option maybe?
this puts constant load on the memory and processing. every broadcast packet on network is stored in RX buffer and processed. and all this for one DHCP packet.
Would there be a way to enable Broadcast only when needed? Like, enable it just before sending DHCP and disabeling it afterwards?
why does you DHCP server send the response as broadcast? for me the unicast didn't work only when I used an Ethernet to WiFi adapter.
Would there be a way to enable Broadcast only when needed? Like, enable it just before sending DHCP and disabeling it afterwards?
You could try it. The datasheet doesn't constrain when the filter can be set. But I didn't test. I didn't put time into this since I didn't know how common is the issue.
why does you DHCP server send the response as broadcast? for me the unicast didn't work only when I used an Ethernet to WiFi adapter.
I don't know. I'm using a Huawei Router in it's default config.
You could try it. The datasheet doesn't constrain when the filter can be set. But I didn't test. I didn't put time into this since I didn't know how common is the issue.
I'll try when I find some time. Since the router I'm using is the one provided by my ISP, I think the issue might be more common, than expected.
ERXFCON_BCEN
Where do you added this peace of code?
Edit:
I added it to src/utility/Enc28J60Network.cpp:90
And DHCP starts to work fine.
hi @Craft4Cube,
I am working on interfacing the ENC with a nucleo using mbed, I am currently stuck because its not working, using DHCP, would you please share with me exactly where I need to edit in the code so that DHCP can work?
For anyone interested in the change I made, you can find it here: https://github.com/NetCube-Systems-Austria/EthernetENC/commit/faaf3f2b4ff744fcec7ec02d16199e1e8d907ed1