I'm sorry if this is duplicate.
I'm writing a program that requires to connect to an specific H/W device over TCP with Modbus. Th eproblem I have is that the device doesn't recognize my commands. I captured the packets with ethereal and compared them with the packet sent by the device provide windows application and they are almost identical except one diffrence. In my packets, the TCP contains options and therefore the TCP header size is 32. On their program, TCP headers does not have options and the header size is 20.
With this, my speculation is that the device can not handle TCP options (perhaps the header size is hardcoded rather than reading it from the header). So I'm stuck. My question is, is there any way I can configure my sockets to ignore TCP options. Basically, I want the TCP headers not to include any options to keep the header size exactly 20.
Thanks all, barzia - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
