extract dns_parser.rs into its own crate mdns-parser (#284)

- the new crate is kept in this same repo to keep things easier to manage (and the patch diff easier to track).
- mdns-sd crate will depend on the new crate mdns-parser (inside the repo)

.gitignore

@@ -7,6 +7,7 @@
 # Generated by Cargo
 # will have compiled files and executables
 /target/
+mdns-parser/target/
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
 # More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html

Cargo.toml

@@ -23,6 +23,7 @@ if-addrs = { version = "0.13", features = ["link-local"] } # get local IP addres
 log = { version = "0.4", optional = true }             # logging
 mio = { version = "1.0", features = ["os-poll", "net"] }  # select/poll sockets
 socket2 = { version = "0.5.5", features = ["all"] }      # socket APIs
+mdns-parser = { path = "mdns-parser" } # DNS message parsing
 
 [dev-dependencies]
 env_logger = { version = "= 0.10.2", default-features = false, features= ["humantime"] }

mdns-parser/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "mdns-parser"
+version = "0.1.0"
+edition = "2018"
+rust-version = "1.65.0"
+authors = ["keepsimple <[email protected]>"]
+keywords = ["mdns", "service-discovery", "zeroconf", "dns-sd"]
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/keepsimple1/mdns-sd"
+description = "DNS message parsing for mDNS Service Discovery"
+
+[features]
+logging = ["log"]
+
+[dependencies]
+log = { version = "0.4", optional = true }             # logging
+
+[dev-dependencies]
+fastrand = "2.1"

mdns-parser/README.md

@@ -0,0 +1,12 @@
+# mdns-parser
+
+A DNS message parsing utility for mDNS service discovery. Originally it was just a file in the [`mdns-sd`](https://crates.io/crates/mdns-sd) crate, and now it is built into its own crate so that it can be used in other cases. Please note that the API is still experimental and might change in near future.
+
+## Contribution
+
+Contributions are welcome! Please open an issue in GitHub if any questions.
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the above license(s), shall be
+dual licensed as above, without any additional terms or conditions.
+