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5cfbe23b5c65e9c5da88dbf15c95022caabdabc2
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10 Commits

Author SHA1 Message Date
Red Bear OS 5cfbe23b5c cleanup: fix unreachable pattern warnings in TCP/UDP socket options 
TCP and UDP get_sock_opt/set_sock_opt had duplicate match arms
due to constant collisions (Linux-level values share namespace):

  TCP: TCP_MAXSEG=2, IP_TTL=2, SO_REUSEADDR=2 → kept TCP_MAXSEG
  UDP: IP_TTL=2, SO_REUSEADDR=2 → kept IP_TTL (more useful)

Removed unreachable arms with explanatory comments. The
collision is inherent — Linux uses different option levels
(SOL_SOCKET vs IPPROTO_TCP vs IPPROTO_IP) but Redox scheme
has a flat namespace. Applications that use multi-level
getsockopt() would need richer level dispatching.
 2026-07-08 15:43:42 +03:00
Red Bear OS 27f8e351e6 arp: add statistics counters and netcfg exposure 
EthernetLink gains per-interface ARP counters:
- arp_requests: ARP requests sent (incremented in send_arp)
- arp_replies: ARP replies received (incremented on cache insert)
- arp_cache_hits: successful neighbor cache lookups
- arp_cache_misses: cache misses (vacant or expired entries)

LinkDevice trait gains arp_stats() → String method.
EthernetLink implementation: 'requests=N replies=N hits=N misses=N entries=N'

netcfg exposes at /scheme/netcfg/ifaces/eth0/arp/stats:
  echo /scheme/netcfg/ifaces/eth0/arp/stats
  → requests=5 replies=3 hits=142 misses=8 entries=4

Existing arp/list (MAC→IP) and arp/flush (clear) are unchanged.
Useful for monitoring ARP churn, detecting ARP storms, and debugging
neighbor discovery issues.
 2026-07-08 15:38:49 +03:00
Red Bear OS ba5a7cd3fc sysctl: add /scheme/netcfg/sysctl tree with ip_forward toggle 
Router gains Rc<Cell<bool>> ip_forward flag (default: true).
When false, forward_packets() returns immediately — no packets forwarded
between interfaces. Security best practice for non-router hosts.

netcfg scheme gains sysctl subtree:
  /scheme/netcfg/sysctl/net/ipv4/ip_forward  (rw: 0 or 1)

Read:  echo /scheme/netcfg/sysctl/net/ipv4/ip_forward  →  1
Write: echo 0 > /scheme/netcfg/sysctl/net/ipv4/ip_forward  (disable)
Restore: echo 1 > /scheme/netcfg/sysctl/net/ipv4/ip_forward

Mirrors Linux /proc/sys/net/ipv4/ip_forward.
Shared via Rc<Cell<bool>> between Router and NetCfgScheme.
 2026-07-08 15:20:21 +03:00
Red Bear OS 107e3b6851 stp: enforce blocking on unicast send + enhanced stats display 
BridgeDevice STP hardening:
- send(): check STP blocking before unicast forwarding (host-originated)
- recv(): check STP blocking before unicast forwarding (switched frames)
- Previously only flood() checked STP; unicast forwarding bypassed it.
  A blocked port must never forward any traffic — STP semantics now correct.

netcfg stats enhancement:
- Per-interface stats now include mtu= and link= fields alongside counters
- Applies to both eth0 and loopback
- Enables bandwidth monitoring tools to self-discover MTU/link state
 2026-07-08 14:53:08 +03:00
Red Bear OS 0baceb0ef6 tcp: extend TcpInfo with send/recv queue, congestion window, MSS 
TCP_INFO socket option now returns real-time connection metrics:
- tcpi_snd_queuelen: bytes queued for transmission
- tcpi_rcv_queuelen: bytes waiting in receive buffer
- tcpi_snd_cwnd: send capacity (congestion window proxy)
- tcpi_rcv_wnd: receive capacity (advertised window proxy)
- tcpi_snd_mss: maximum segment size (1460 for Ethernet)
- tcpi_state, tcpi_rto preserved from prior version

Struct layout: #[repr(C)] 28 bytes, compatible with Linux TCP_INFO consumers.
 2026-07-08 14:30:05 +03:00
Red Bear OS e05315fc38 udp: socket option completeness — SO_REUSEADDR, SO_BROADCAST, IP_TTL 
- UDP port allocation now falls back to claim_port_reuse() (SO_REUSEADDR)
- SO_REUSEADDR get/set added to both UDP and TCP schemes
- SO_BROADCAST getter added to UDP (always returns 1)
- IP_TTL getter/setter added to UDP (get/set hop_limit)
- TCP: SO_REUSEADDR get/set added for API completeness
- All new options return known values for application compatibility
 2026-07-08 13:57:00 +03:00
Red Bear OS 2b278390ee tun: wire TUN scheme into event loop + SLAAC RS/RA protocol 
TUN integration:
- Smolnetd gains tun_scheme: TunScheme field and tun_file parameter
- on_tun_scheme_event() handler added (scheme event → poll)
- main.rs: EventSource::TunScheme, subscription, dispatch
- TUN devices can now receive and transmit packets through the netstack

SLAAC (RFC 4862):
- build_router_solicitation(): ICMPv6 Type 133 with source LL address option
- parse_router_advertisement(): ICMPv6 Type 134 with Prefix Information
  option extraction (on-link, autonomous, lifetimes)
- Slacd state machine: Idle → Solicited → Configured
  tick() drives RS retransmit (3 retries, 5s timeout)
  process_ra() extracts autonomous /64 prefixes
- ParsedRa, RaPrefix public structs for integration with IPv6 stack

Reference: Linux 7.1 ndisc_send_rs() / ndisc_router_discovery() /
addrconf_prefix_rcv()
 2026-07-08 13:47:04 +03:00
Red Bear OS bb3e36e4e0 restore: networking stack files from reflog (Phases 1-6) 
Recovered from reflog commits 1c80937e and d0ecc067 after force-push data loss.
Includes: filter/, icmp_error.rs, slaac.rs, bond.rs, bridge.rs, gre.rs, ipip.rs,
qdisc.rs, tun.rs, vlan.rs, vxlan.rs, netfilter.rs, tun.rs, conntrack.rs, nat.rs,
rule.rs, table.rs, redbear-ufw/, dhcpv6d/, netdiag/ — 39 files total.
 2026-07-08 13:27:49 +03:00
Red Bear OS cb1c326645 netcfg: add sockets/list node for active connection count 2026-07-08 09:42:03 +03:00
Red Bear OS dd08b76a39 Red Bear OS base baseline from 0.1.0 pre-patched archive 2026-06-27 09:21:43 +03:00