[Solved] No ARP ping packets transmitted from w5500 (TCP/IP works propertly)

Question

Hi, I’ve used standart code from IPRAW ping example, changed only the way of debug output. I use ping_auto(0,pingto); function, short init code is: u8 pingto={10,10,10,4}; //PC IP int8_t memsize[2][8] = {{2,2,2,2,2,2,2,2},{2,2,2,2,2,2,2,2}}; if(ctlwizchip(CW_INIT_WIZCHIP,(void*)memsize) == -1) { printf(“init fail”); while(1); } for(i=0;i<_WIZCHIP_SOCK_NUM_;i++) { close(i); disconnect(i); } network_init(); W5500 IP is 10.10.10.132. TCP/IP works propertly (I have web server on w5500). Debug output is: ping datum: 8,0,114,106,18,52,67,33,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7, Send Ping Request to Destination 10.10.10.4 ID:4660 SeqNum:17185 CheckSum:29290 Ping req timed out sn=0 ping datum: 8,0,114,104,18,53,67,34,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7, Send Ping Request to Destination 10.10.10.4 ID:4661 SeqNum:17186 CheckSum:29288 Ping req timed out sn=0 ping datum: 8,0,114,102,18,54,67,35,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7, Send Ping Request to Destination 10.10.10.4 ID:4662 SeqNum:17187 CheckSum:29286 Ping req timed out sn=0 ping datum is a byte representation of ping packet. W5500 “thought” that packet was sent, but WireShark shows nothing.

Kovalenko Evhen · Answer

ping_request function: uint8_t ping_request(uint8_t s, uint8_t *addr) { uint16_t i; ping_reply_received = 0; PingRequest.Type = PING_REQUEST; // Ping-Request PingRequest.Code = CODE_ZERO; // Always '0' PingRequest.ID = htons(RandomID++); // set ping-request's ID to random integer value PingRequest.SeqNum =htons(RandomSeqNum++);// set ping-request's sequence number to ramdom integer value //size = 32; // set Data size /* Fill in Data[] as size of BIF_LEN (Default = 32)*/ for(i = 0 ; i < BUF_LEN; i++) PingRequest.Data[i] = (i) % 8; //'0'~'8' number into ping-request's data /* Do checksum of Ping Request */ PingRequest.CheckSum = 0; // value of checksum before calucating checksum of ping-request packet PingRequest.CheckSum = htons(checksum((uint8_t*)&PingRequest,sizeof(PingRequest))); // Calculate checksum /* sendto ping_request to destination */ if (debug) debug_print_u8_arr("ping datum: ",(uint8_t *)&PingRequest,sizeof(PingRequest)); if(sendto(s,(uint8_t *)&PingRequest,sizeof(PingRequest),addr,3000)==0) // Send Ping-Request to the specified peer. { if (debug) debug_print_par("Fail to send ping-reply packet sn=",s);} else { if (debug) { debug_print_IP("Send Ping Request to Destination ",addr); debug_print_par("ID:", htons(PingRequest.ID)); debug_print_par("SeqNum:", htons(PingRequest.SeqNum)); debug_print_par("CheckSum:", htons(PingRequest.CheckSum)); } } return 0; } // ping request Please, notice to my mistake, if possible.

Eugeny · Answer

Not clear what you are trying to achieve. Do you ping W550 and then your code answers or do you use W5500 code to ping other device? Kovalenko_Evhen: ping datum is a byte representation of ping packet. W5500 “thought” that packet was sent, but WireShark shows nothing. This sounds strange and I have a suspicion that it is wireshark does not see the packet for some reason. To see it wirehsark must be installed on final network node, or on the bridge. ICMP packets are not broadcast, and hubs/routers will not route them to inappropriate locations/ports once knowing the right location of the destination.

Eugeny · Answer

Ok, then I would say you have some W5500 configuration issue. Your code is fragmented, so hard ti find the cause. Do you use socket 0? Do you open socket 0 in IPRAW mode? I did not check, but are you sure that ICMP packet header is correct (however if not correct Wireshark would show it anyway as malformed packet). When W5500 performs send command, do its receive and send LEDs flash (so does it send physically?)

Kovalenko Evhen · Answer

Do you use socket 0? — YES Do you open socket 0 in IPRAW mode? –YES with following code: IINCHIP_WRITE(Sn_PROTO(s), IPPROTO_ICMP); // set ICMP Protocol socket(s,Sn_MR_IPRAW,3000,0) -->>returned 0 When W5500 performs send command, do its receive and send LEDs flash — NO(!) (in TCP yes) Socket switches to IPRAW, getSn_SR(0) returns 0x32 Sending packet sendto(s,(uint8_t *)&PingRequest,sizeof(PingRequest),addr,3000) returns 0

Kovalenko Evhen · Answer

What should I check next?

Kovalenko Evhen · Answer

I’ve just used mix of w5500 library files with different versions. Thanks and sorry for my inattention.