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Questions tagged [tftp]

Trivial File Transfer Protocol (TFTP) is a file transfer protocol notable for its simplicity.

TFTP is a very simple and lightweight file transfer protocol.
It only supports to read and to write files from/to a remote. Even a directory listing is not supported. It is sometimes used to boot devices without data storage or to update firmware.
TFTP is build on top of UDP and using port 69.

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how to over come Little endian to big endian problem in TFTP client and server communication.?

i am creating WRQ packet for TFTP client in cPP. the code works fine in Little endian system (PC) and have proble m with Big Endian system while creating packets. the code is #define TFTP_OPCODE_READ 1 #define TFTP_OPCODE_WRITE 2 …
Balamurugan
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RaspberryPi 4: tftp boot issues with udpsvd / qemu

I build a minimal linux system with buildroot to provide some services like tftp and a other things. From that i want to boot my rpi4 over network with initramfs. Currently i do this from an ubuntu virtual machine, but the footprint is a little bit…
wolfbiker1
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What's the purpose of using bind() when SOCK_DGRAM is used?

Here is a piece of code snippet from tftp void initsock(int af) { struct sockaddr_storage s_in; if (f >= 0) close(f); f = socket(af, SOCK_DGRAM, 0); if (f < 0) { perror("tftp: socket"); exit(3); } …
HQW.ang
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TFTPD Failing with "unknown option -?"

I am trying to run a PXE server on VM and another client on another VM for testing. I am using tftpd-hpa to host a tftp server. This is failing with the following error : unknown option -? ... Failed t start LSB: HPA's tftp server. This is the…
Vishesh
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Master boot image but using different hostnames

I have a large volume of devices that boot from a TFTP server and mount their filesystem as a read-only NFS share. All these devices boot from the same custom raspbian image, which saves us a lot of space as we don't have to store one image per…
Disgruntled_Penguin
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How is a TFTP server supposed to handle duplicate ACK messages and duplicate DATA messages from a client?

I'm creating a TFTP server and trying to figure out how I need to handle duplicate ACK messages received from the client and duplicate DATA messages received from the client based on the TFTP protocol: https://www.rfc-editor.org/rfc/rfc1350#ref-4
lauren
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How to get Python's os.system() to run the Windows 10 tftp client feature?

Using Python 2.7 on Windows 10. I want to use the Windows tftp client. Why would os.system() give a different result to typing the tftp command at the command prompt? (Use of 2.7 instead of 3, and the Windows TFTP client instead of looking for…
fpeelo
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How much files can be sended via python using tftp

I have python script: Using telnet it connects to remote host via telnet and simply executing command. It works fine with one host, but If i want using function to connect to 4+ hosts it maybe from 4-5 try sends only one random. def main(): usr…
Jane
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How to stop TFTP server using TFTPy on Python

I need to use TFTP server on Python and I try to use TFTPy module for it. Server works perfect, but I can't stop it in moment as I wish. Python v3.7, TFTPy v 0.8.0, Windows 10x64. I tried to write simple code and using threads but nothing…
Sergey Bortnik
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What happens to select() when socket is set to handle timeout

According to the manual page for recv(), errno is set to EAGAIN or EWOULDBLOCK if a timeout has been set for receive using setsockopt(SO_RCVTIMEO). My question is what happens if multiple such sockets are used with select(). Would select return if…
Parth K
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Unable to execute configuration on router through TFTP's python script

I am trying to use the ZTP approach to configure my router [R2]. My Ubuntu machine is both DHCP and TFTP server. Ubuntu [DHCP Server]: 16.04.5 LTS Cisco Router [DHCP Client]: 7200, version 15.2(4)S5 This is the python script- ztp.py. ztp.py is…
Prarthana Shedge
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Filename string in DHCP/BOOTP/TFTP Read Request presenting extra characters

While building a basic Windows Image deployment solution (using WinPE and custom applications built in C#), I came across a problem of 2 Computers not being on the same subnet/IP segment (no static IP Address or DHCP Servers & DNS/Routing tables).…
R.McInnes-Piper
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tftp booting my raspberry pi, but initramfs file is not requested by the raspberrypi

I am using custom Linux Kernel built through Yocto. I generated sdimg and try to boot it using an SDCARD and it boots perfectly fine. Here along with the Kernel I also use INITRAMFS files. Using config.txt and cmdline.txt file in partition 1, I tell…
Naveen KH
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Why does the TFTP standard have 2 bytes for its OP Code?

#Why is the Opcode for a TFTP packet 2 whole bytes? The latest revision of the TFTP Standard, on the bottom of page 3, says that The TFTP header consists of a 2 byte opcode field which indicates the packet's type (e.g., DATA, ERROR, etc.) It…
Isaiah Taylor
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tftpy package sytax errors on import

I've just installed the package tftpy version 0.6.2 when I import it I get a syntax error with the line: running the code: import tftpy I get the error: raise ImportError, "Requires at least Python 2.3" SyntaxError: Invalid syntax I have version…
Rob
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