Issues

• clarify incomplete netmasks in pcap_findalldevs()

  Task

  the-tcpdump-group/libpcap#1797 · Filter by author infrastation opened on Oct 28, 2026

• use TinyCC thread-local storage if possible

  compiling
  Task

  the-tcpdump-group/libpcap#1790 · Filter by author infrastation opened on Oct 18, 2026

• make "ip broadcast" a function of the connected IPv4 prefixes

  BPF related
  Feature

  the-tcpdump-group/libpcap#1782 · Filter by author guyharris opened on Oct 14, 2026
  3

• pcap_dump_fopen() closes the stream on some failures but not others

  pcap-input-outputruntime
  Bug

  the-tcpdump-group/libpcap#1781 · Filter by author cicku opened on Oct 14, 2026
  5

• netmap module counts received packets before filtering

  Bug

  the-tcpdump-group/libpcap#1733 · Filter by author infrastation opened on Aug 28, 2026
  9

• bpf_filter: Unsigned integer overflow

  the-tcpdump-group/libpcap#1730 · Filter by author fxlb opened on Aug 23, 2026
  2

• Optimizer dead-store elimination removes a live st M[1] for vxlan filters → vxlan and ip / vxlan and arp silently fail to match (optimize=1)

  BPF relatedoptimizer
  Bug

  the-tcpdump-group/libpcap#1726 · Filter by author kid-lxy opened on Aug 19, 2026
  1

• savefile reader provides a caplen > len if the captured length in the file is > the on-the-network length

  the-tcpdump-group/libpcap#1710 · Filter by author kid-lxy opened on Jul 27, 2026
  9

• Different timestamps in egress and ingress when using hw timestamping

  generic support
  the-tcpdump-group/libpcap#1701 · Filter by author matijaGP opened on Jul 14, 2026
  23

• BPF optimizer miscompilation: equal constant sub-expressions collapse a comparison into a constant

  optimizer
  Bug

  the-tcpdump-group/libpcap#1699 · Filter by author kirk-baird opened on Jul 13, 2026
  1

• Sending packets to a TAP device does not work on Linux

  Linux
  Bug

  the-tcpdump-group/libpcap#1696 · Filter by author jbglaw opened on Jul 1, 2026
  7

• C23 / GCC 15 compatibility: u_char, u_short, u_int missing from sys/types.h

  compiling
  the-tcpdump-group/libpcap#1679 · Filter by author texasich opened on May 8, 2026
  23

• Add support for mxl862xx-8021q Linux DSA tag

  DSA
  Feature

  the-tcpdump-group/libpcap#1675 · Filter by author pprindeville opened on Apr 30, 2026
  7

• dlpi: Truncation warning on Solaris 10 with gcc

  compiling
  the-tcpdump-group/libpcap#1673 · Filter by author fxlb opened on Apr 27, 2026
  1

• vxlan: "vxlan" filter do not support "vxlan and arp"

  BPF relatedoptimizer
  Bug

  the-tcpdump-group/libpcap#1670 · Filter by author satanaileo opened on Apr 20, 2026
  10

• fuzz: Many warnings when FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION is set

  the-tcpdump-group/libpcap#1644 · Filter by author fxlb opened on Mar 6, 2026
  14

• network interface connection status on Solaris 11.4

  Feature

  the-tcpdump-group/libpcap#1617 · Filter by author infrastation opened on Feb 1, 2026

• [FR] Support for CLOCK_MONOTONIC_RAW for packet timestamps

  Feature

  the-tcpdump-group/libpcap#1570 · Filter by author fivlao opened on Oct 22, 2025
  2

• pcap_lookupnet doesn't know about rpcap devices

  rpcap
  Bug

  the-tcpdump-group/libpcap#1550 · Filter by author johnthacker opened on Aug 27, 2025

• Rpcap filters that require BPF extensions (e.g., vlan) do not work

  BPF relatedrpcap
  the-tcpdump-group/libpcap#1549 · Filter by author johnthacker opened on Aug 27, 2025

• Need to generate arbitrary-length error strings and provide a new API needed to fetch those arbitrary-length error strings

  Task

  the-tcpdump-group/libpcap#1544 · Filter by author guyharris opened on Aug 10, 2025
  1

• [FR] rpcap over WebSocket

  rpcap
  Feature

  the-tcpdump-group/libpcap#1540 · Filter by author PlushBeaver opened on Jul 30, 2025

• Attempts to open a non-existent interface should always return "no such interface" even if you don't have capture permissions

  Task

  the-tcpdump-group/libpcap#1538 · Filter by author guyharris opened on Jul 29, 2025

• The remote (rpcap) capture API functions are not documented.

  documentationrpcap
  Task

  the-tcpdump-group/libpcap#1534 · Filter by author dmiller-nmap opened on Jul 22, 2025
  4

• ARP and RARP matching hard-codes HL to 6

  BPF related
  Bug

  the-tcpdump-group/libpcap#1515 · Filter by author infrastation opened on May 16, 2025