Trouble sending ICMP (but can receive ok and send UDP & TCP)

Question

Hi, I am using a W5500 with a Silicon Labs EM357 (ARM based). I’ve setup socket 0 as MACRAW and can receive all kinds of traffic on this socket (ICMP, UDP, IPv6), which is good. I’ve setup socket 4 as TCP Server and can receive TCP traffic on this and send TCP traffic (telnet), which is good. I’ve setup socket 2 as UDP and can send UDP from this socket, which is good. I cannot seem to send ICMP using the socket 0 which is setup for MACRAW. If I use the same code and change to using socket 2 (UDP) the packet goes out (but has an IP and UDP header and is not ICMP). Any ideas on what could make the packet not go out? The status on socket 0 is 0x42 = SOCK_MACRAW. I’ve included a dump of the socket registers and common registers, and the code used for init and send of the ICMP packet. Any suggestions or help is greatly appreciated. Thanks, -Matt ------------ Common Register ------------- Mode (MR)…: 10 Gateway Addr (GAR)…: 0A 01 01 01 Subnet Mask (SUBR)…: FF FF FF 00 Src HW addr (SHWR)…: 70 B3 D5 55 90 88 Src IP addr (SIPR)…: 0A 01 01 C0 Int Level (INTLVL)…: 00 00 Interrupt(IR)…: 00 Int Mask (IMR)…: 80 Sock Int (SIR)…: 00 Sock Int Mask (SIMR): FF Retry time (RTR)…: 07 D0 Retry count (RCR)…: 02 unreach IP (UIPR)…: 00 00 00 00 unreach Port (UPRTR): 00 00 Phy config (PHYCFGR): FF chip version (VERR).: 04 ------------ Socket Register 0: raw ------------- mode (SnMR)…: 04 command (SnCR)…: 00 interrupt (SnIR)…: 00 status (SnSR)…: 42 source port (SnPORTR).: 00 00 Dst HW addr (SnDHAR)…: FF FF FF FF FF FF Dst IP addr (SnDIPR)…: 00 00 00 00 Dst Port (SnDPORT)…: 00 00 Max seg size (SnMSSR).: 05 B4 RX buff size (SnRXBUF): 02 TX buff size (SnTXBUF): 02 TX Free size (SnTXFSR): 08 00 TX Read ptr (SnTXRD)…: 00 4A TX Write ptr (SnTXWR).: 00 4A RX recv size (SnRXRSR): 00 00 RX read ptr (SnRXRD)…: 01 E2 RX write ptr (SnRXWD).: 01 E2 Int Mask (SnIMR)…: FF My init code for socket 0: // sc1SpiReadOrWrite6BytesOrLess(readOrWrite, socketId, addresToWriteTo, byteToWrite, values…) // Mode = MACRAW = 0b0100 = 0000 0100 = 0x04 sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x0000, 1, 0x04, 0,0,0,0,0); // command = OPEN = 1 sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x0001, 1, 0x01, 0,0,0,0,0); // max segment size = 1460 sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x0012, 2, 0x05, 0xB4,0,0,0,0); // IP TOS = 0b1000 = 0x08 sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x0015, 1, 0x08, 0,0,0,0,0); // IP TTL = default for IP = 64 sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x0016, 1, 64, 0,0,0,0,0); // RX Buffer = 2KB sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x001E, 1, 2, 0,0,0,0,0); // TX Buffer = 2KB sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x001F, 1, 2, 0,0,0,0,0); My “send a ping” code for socket 0: // dest mac address sc1SpiReadOrWrite6BytesOrLess(SPI_WRITE, BLOCK_SOCKET0_REGISTER, 0x0006, 6, 0x74, 0x86, 0x7A, 0x59, 0xA9, 0x47)…

mattsmith · Answer

I didn’t figure out why I can’t send from a MACRAW socket but I did change to use a IPRAW socket and use ICMP and this allowed me to send and receive ICMP messages