dpibreak.git/src/platform/linux/rxring.rs, branch v0.5.1System-wide DPI circumvention with minimal configuration
http://git.dilluti0n.com/dpibreak.git/atom?h=v0.5.12026-03-06T07:53:48Zlinux: add IPv6 SYN/ACK BPF filter and increase rxring frame size2026-03-06T07:53:48Zdilluti0nhskimse1@gmail.com2026-03-06T07:46:07Zurn:sha1:6bea73a790e649de174444e149e7f84143fa0c62
Previous BPF filter only matched IPv4 due to tcpdump failing to
generate a correct combined IPv4/IPv6 filter. Replaced with manually
split filter that handles both ip and ip6 paths.
Also increase FRAME_SIZE from 128 to 256 to resolve this error:
[WARNING] put_hop: IPv6 Packet Error: Not enough data to decode 'IPv6
packet'. 80 byte(s) would be required, but only 62 byte(s) are
available based on the slice length.
tpacket_hdr(~66) + eth(14) + ipv6(40) + tcp+options(60) = ~180 bytes,
which exceeded the previous 128-byte limit.
linux: fix rxring initialized even if fake_autottl not enabled2026-02-26T08:15:09Zdilluti0nhskimse1@gmail.com2026-02-26T05:33:30Zurn:sha1:822adfe118919add1694878ec668a7962ed077c4
Conditionally initialize rxring only when fake_autottl is enabled.
Extract poll_once() using libc::poll directly; fd=-1 trick eliminates
the need for conditional branching on optional rxring fd, as poll sets
revents=0 for negative fds per POSIX. Drop nix poll feature.
linux: refactor run() into open_nfqueue/open_rxring helpers2026-02-26T08:15:09Zdilluti0nhskimse1@gmail.com2026-02-26T04:03:54Zurn:sha1:1c589ea880d5022b9171b0739494af383f368119
Extract nfqueue initialization (open, bind, set O_NONBLOCK) and rxring
initialization (cBPF filter, open) into separate functions. Inline
BorrowedFd scope as a let binding to eliminate floating
q_ready/rx_ready declarations. Move SYNACK_443_CBPF const into
open_rxring.
linux: rxring: implement current_packet and advance2026-02-26T08:15:09Zdilluti0nhskimse1@gmail.com2026-02-25T08:39:53Zurn:sha1:5ff44848e99f27b2095af7d8e9b98c60785ee094
- Split next_packet into current_packet (read) and advance (release)
to avoid TOCTOU between kernel overwrite and packet processing
- Add current_frame helper to avoid duplicated pointer arithmetic
- Switch AF_PACKET socket to ETH_P_ALL for future IPv6 support
- Add FRAME_SIZE comment explaining 128B is sufficient for IP header
linux: rxring: implement RxRing::new2026-02-26T08:15:09Zdilluti0nhskimse1@gmail.com2026-02-25T07:05:34Zurn:sha1:cbabc7b79165f4e02e7bcc325eefc056845a0bd9linux: add rxring skeleton and integrate into run loop2026-02-26T08:15:09Zdilluti0nhskimse1@gmail.com2026-02-25T06:15:34Zurn:sha1:9ac1de4587da5be42cf98382d5163ef42db9372d
- Add rxring module with RxRing struct (new/next_packet unimplemented)
- Attach cBPF filter for TCP src port 443 SYN/ACK packets
- Multiplex nfqueue and rxring via poll in run loop
- Move fake_autottl SYN/ACK handling to pkt::put_hop