For a deeper look into all major changes in this version, please check this blog post.

New features/additions:

Add parent PDU to each PDU.
Removed parent PDU parameter on PDU::write_serialization.
Split utils.h into multiple files under the utils directory.
Split internals.h into multiple files under the detail directory.
Improve compilation times by removing useless include directives.
Refactor PDUOption conversions so that heavy headers are not included in source file.
Use std::vector instead of std::list in TCP, IP, IPv6, DHCP, DHCPv6, DNS, LLC, Dot11 and PPPoE.
Improve performance on IP, IPv6 and TCP by compiting option sizes during serialization.
Minor performance improvements in DNS.
Refactor RadioTap parsing and serialization using a generic parser/writer.
Add BaseSniffer::set_pcap_sniffing_method to specify whether pcap_loop or pcap_dispatch should be used when sniffing.
Added cipher and akm suites from 802.11-2016.
Add IPv6 layer parsing on Loopback packets.
Allow serializing Loopback on Windows.
Restructure CMake files removing useless CMakeLists.txt in include paths.
Add getter/setter for "more data" field in Dot11Base.
Implemented matching for ND protocol related ICMPv6 messages.
Add header files into CMake sources so IDE can pick them up.
Add MPLS "experimental" field.

Fixes

Fix IPv6 next header handling. Now each one contains its own type and the next type is only set during serialization for ease of use.
Fix dhcpv6::duid_type constructor from duid_ll.
Use IFF_POINTOPOINT on BSD when getting broadcast address for an interface.
Ensure TCP::OptionTypes has 8-bit range.
Use the first fragment as a base when reassembling IP packets in IPv4Reassembler.
Use the right flag on Loopback for IPv6.