A portable system-independent C library for user-level network packet capture across multiple platforms.
libpcap is a portable C library that provides a system-independent interface for capturing network packets at the user level. It solves the problem of different operating systems having incompatible packet capture mechanisms by offering a unified API that works across platforms like Linux, BSD variants, macOS, and Solaris.
Network tool developers, security researchers, and system administrators who need to build applications that perform low-level network packet capture and analysis across multiple operating systems.
Developers choose libpcap because it provides a mature, stable, and portable abstraction layer for packet capture, eliminating the need to write and maintain separate code for each operating system's native packet capture interface.
the LIBpcap interface to various kernel packet capture mechanism
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
Provides a unified API for packet capture across Linux, BSD variants, macOS, and Solaris, eliminating the need for system-dependent code, as stated in the README's description of its system-independent interface.
Supports BSD Packet Filter architecture for efficient packet selection, with in-kernel filtering on systems like BSD and macOS to minimize overhead, as mentioned in the README's discussion of BPF interfaces.
Serves as the underlying library for tools like tcpdump and Wireshark, indicating reliability, and maintains binary compatibility between releases with proper soname versioning for long-term stability.
Ensures binary compatibility across releases by setting the soname to libpcap.so.1, avoiding tying binaries to specific versions, which simplifies deployment and updates.
Does not support eBPF mechanisms on Linux yet, missing out on modern performance and filtering features available in newer kernel versions, as admitted in the README.
On platforms without in-kernel BPF, libpcap must read every packet into user-space for filtering, incurring added CPU and memory overhead, especially for selective filters, as noted in the README.
Requires consulting OS-specific README files to enable packet capture support, which can involve manual configuration and troubleshooting, adding to setup time.