Tiny Network Mapper

A tiny Rust utility that scans a PCAP file, extracts every IP seen, and summarizes:

• total inbound / outbound connections trial per host
• interesting source ports (ignores ephemeral ports ≥ 49152)
• source ⇄ destination link counts

Configuration comes from a simple JSON file:

{
  "networks": [
    { "name": "Lab", "ip_cidr": "192.168.0.0/24" },
    { "name": "Prod", "ip_cidr": "10.0.0.0/16" }
  ]
}

Only hosts inside the listed CIDRs are reported.

Build & run

cargo build --release
./target/release/network_mapper

• config.json must sit next to the binary.
• example.pcap (or any file you choose) is parsed at runtime.

Output

Pretty-printed JSON (output.json) containing:

[
  {
    "ip": "192.168.0.10/32",
    "ports": [22, 443],
    "nb_connections_src": 14,
    "nb_connections_dst": 3
  }
]

A console summary is also displayed while parsing.