how to use BPF filter to filter packet payload? Filtering Packet Payloads with BPF A Deep Dive The Problem Network administrators often need to analyze and filter network traffic based on the content of packe 2 min read 07-10-2024 7
Different byte order in BPF program Endianness Headaches Understanding Byte Order in BPF Programs The world of programming is full of subtle details that can lead to frustrating bugs if overlooked 2 min read 05-10-2024 9
Loading large BPF program fails with "Argument list too long" and "processed 0 insns" Understanding BPF Program Loading Failures Argument List Too Long and Processed 0 Insns When working with e BPF Extended Berkeley Packet Filter programs you mig 3 min read 28-09-2024 8
When bprm->file is fetched using ebpf-lsm, the different bprm's fetched point to the same strange file pointer Understanding the Issue with bprm file Fetched Using e BPF LSM When working with e BPF Extended Berkeley Packet Filter and LSM Linux Security Modules a common p 2 min read 20-09-2024 12
How to bpf_prog_test_run_opts to a program that extends xdp_dispatcher How to Use bpf prog test run opts in an XDP Dispatcher Program In the realm of high performance networking the e BPF Extended Berkeley Packet Filter technology 3 min read 17-09-2024 29
Directing Packets further in the Network Stack from UMEM Understanding Packet Drops in AF XDP UMEM A Guide to Efficient Packet Handling This article explores the common issue of packet drops when using the User Memory 2 min read 01-09-2024 17
Why does the verifier detect an infinite loop in this code? Unveiling the Infinite Loop A Deep Dive into BPF Program Verification This article explores a common issue faced by BPF Berkeley Packet Filter program developer 2 min read 30-08-2024 27
How does mmap'ed eBPF map shared between processes synchronizes operations? Demystifying Shared e BPF Map Synchronization A Deep Dive into mmap ed Array Maps e BPF Extended Berkeley Packet Filter has become a powerful tool for user spac 2 min read 29-08-2024 25
How eBPF stack works Demystifying the e BPF Stack A Deep Dive into Function Calls and Stack Size Limitations e BPF Extended Berkeley Packet Filter is a powerful technology for exten 3 min read 29-08-2024 21
eBPF Program Hooked to sys_read Traces Negative File Descriptor Values Understanding Negative File Descriptor Values in e BPF Programs This article dives into a common issue encountered when tracing the sys read system call using e 2 min read 28-08-2024 26