nmap/npcap v1.20

Npcap 1.20

on GitHub

Installer, SDK and debug symbols available from https://npcap.org/#download

• Upgrade wpcap.dll to libpcap 1.10. This change enables software to use
  pcap_set_tstamp_type() to set the packet capture time source and precision
  per capture handle. The currently-supported types (see
  pcap-tstamp) are:

  • PCAP_TSTAMP_HOST_HIPREC_UNSYNCED - default, maps to TIMESTAMPMODE_SINGLE_SYNCHRONIZATION
  • PCAP_TSTAMP_HOST_LOWPREC - maps to TIMESTAMPMODE_QUERYSYSTEMTIME
  • PCAP_TSTAMP_HOST_HIPREC - maps to TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE

• Fix an issue preventing WlanHelper.exe from changing WiFi parameters for
  adapters which caused the error message "makeOIDRequest::My_PacketOpenAdapter
  error". Fixes #122 and several other reports
  of the same issue.

• Fixed an issue that prevented NDIS protocol drivers from reducing the
  hardware packet filter, even if the removed bits/filters were only set by
  that protocol driver initially. This may fix #106.

• Fixed an issue with pcap_sendqueue_transmit() that caused it to busy-wait
  in an attempt to synchronize packet sends with pcap timestamps, even when the
  program did not request synchronization. Fixes #113.

• The installer will now safely remove and replace broken installations due to
  #268.

• Upgraded installer to NSIS 3, which improves compatibility with modern Windows versions.

• Added application manifests to several installer tools and removed Windows
  Vista from the manifests of others, improving compatibility.