stuff

11 files changed, 596 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0c92d86
--- /dev/null
+++ b/.gitignore
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+/target
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..53b83fc
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,383 @@
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+# It is not intended for manual editing.
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..66cf791
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "sip"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0.86"
+log = "0.4.22"
+env_logger = "0.11.3"
+nom = "7.1.3"
+rand = "0.9.0-alpha.1"
+base64 = "0.22.1"
diff --git a/src/headermap.rs b/src/headermap.rs
new file mode 100644
index 0000000..8712df1
--- /dev/null
+++ b/src/headermap.rs
@@ -0,0 +1,30 @@
+use crate::headers::Header;
+use anyhow::Result;
+use std::fmt::Display;
+
+pub struct HeaderMap(pub Vec<(String, String)>);
+
+impl HeaderMap {
+    pub fn new() -> Self {
+        Self(vec![])
+    }
+    pub fn add<H: Header>(mut self, h: H) -> Self {
+        self.0.push((H::NAME.to_string(), format!("{h}")));
+        self
+    }
+    pub fn get<H: Header>(&self) -> Option<Result<H>> {
+        self.0
+            .iter()
+            .find(|(k, _)| k == H::NAME)
+            .map(|(_, v)| H::from_str(v))
+    }
+}
+
+impl Display for HeaderMap {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        for (k, v) in &self.0 {
+            write!(f, "{k}: {v}\r\n")?;
+        }
+        Ok(())
+    }
+}
diff --git a/src/headers.rs b/src/headers.rs
new file mode 100644
index 0000000..d837ee5
--- /dev/null
+++ b/src/headers.rs
@@ -0,0 +1,36 @@
+use std::{fmt::Display, str::FromStr};
+
+macro_rules! header {
+    ($hname:literal, struct $name:ident($type:ty)) => {
+        pub struct $name(pub $type);
+        impl Header for $name {
+            const NAME: &'static str = $hname;
+        }
+        impl Display for $name {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                write!(f, "{}", self.0)
+            }
+        }
+        impl FromStr for $name {
+            type Err = anyhow::Error;
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                Ok($name(<$type>::from_str(s)?))
+            }
+        }
+    };
+}
+
+pub trait Header: FromStr<Err = anyhow::Error> + Display {
+    const NAME: &'static str;
+}
+
+header!("Content-Length", struct ContentLength(usize));
+header!("Call-ID", struct CallID(String));
+header!("CSeq", struct CSeq(String));
+header!("Via", struct Via(String));
+header!("Contact", struct Contact(String));
+header!("Max-Forwards", struct MaxForwards(usize));
+header!("From", struct From(String));
+header!("To", struct To(String));
+header!("User-Agent", struct UserAgent(String));
+header!("Allow", struct Allow(String));
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..a7dd227
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,7 @@
+pub mod headermap;
+pub mod headers;
+pub mod method;
+pub mod request;
+pub mod response;
+pub mod status;
+pub mod uri;
diff --git a/src/method.rs b/src/method.rs
new file mode 100644
index 0000000..5f8110a
--- /dev/null
+++ b/src/method.rs
@@ -0,0 +1,23 @@
+use std::fmt::Display;
+
+pub enum Method {
+    Register,
+    Invite,
+    Ack,
+    Option,
+    Cancel,
+    Bye,
+}
+
+impl Display for Method {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(match self {
+            Method::Register => "REGISTER",
+            Method::Invite => "INVITE",
+            Method::Ack => "ACK",
+            Method::Option => "OPTION",
+            Method::Cancel => "CANCEL",
+            Method::Bye => "BYE",
+        })
+    }
+}
diff --git a/src/request.rs b/src/request.rs
new file mode 100644
index 0000000..827dae1
--- /dev/null
+++ b/src/request.rs
@@ -0,0 +1,21 @@
+use crate::{headermap::HeaderMap, method::Method, uri::Uri};
+use std::fmt::Display;
+
+pub struct Request {
+    pub method: Method,
+    pub uri: Uri,
+    pub headers: HeaderMap,
+}
+
+impl Display for Request {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let Self {
+            headers,
+            method,
+            uri,
+        } = self;
+        write!(f, "{method} {uri} SIP/2.0\r\n")?;
+        write!(f, "{headers}\r\n")?;
+        Ok(())
+    }
+}
diff --git a/src/response.rs b/src/response.rs
new file mode 100644
index 0000000..4403c6e
--- /dev/null
+++ b/src/response.rs
@@ -0,0 +1,7 @@
+use crate::headermap::HeaderMap;
+
+
+pub struct Reponse {
+    pub code: u16,
+    pub headers: HeaderMap,
+}
diff --git a/src/status.rs b/src/status.rs
new file mode 100644
index 0000000..de9ea88
--- /dev/null
+++ b/src/status.rs
@@ -0,0 +1,63 @@
+
+macro_rules! status_enum {
+    ($v:vis enum $name:ident { $($variant:ident = $value:literal),*, }) => {
+        $v enum $name { $($variant),*, Other(u16) }
+        impl $name { pub fn from_code(c: u16) -> Self { match c { $($value => Self::$variant),*, x => Self::Other(x) } } }
+        impl $name { pub fn to_code(&self) -> u16 { match self { $(Self::$variant => $value),*, Self::Other(x) => *x } } }
+    };
+}
+
+status_enum!(
+    pub enum Status {
+        Trying = 100,
+        Ringing = 180,
+        CallIsBeingForwarded = 181,
+        Queued = 182,
+        SessionProgress = 183,
+        Ok = 200,
+        MultipleChoices = 300,
+        MovedPermanently = 301,
+        MovedTemporarily = 302,
+        UseProxy = 305,
+        AlternativeService = 380,
+        BadRequest = 400,
+        Unauthorized = 401,
+        PaymentRequired = 402,
+        Forbidden = 403,
+        NotFound = 404,
+        MethodNotAllowed = 405,
+        NotAcceptable = 406,
+        ProxyAuthenticationRequired = 407,
+        RequestTimeout = 408,
+        Gone = 410,
+        RequestEntityTooLarge = 413,
+        RequestURITooLarge = 414,
+        UnsupportedMediaType = 415,
+        UnsupportedURIScheme = 416,
+        BadExtension = 420,
+        ExtensionRequired = 421,
+        IntervalTooBrief = 423,
+        TemporarilyNotAvailable = 480,
+        CallLegTransactionDoesNotExist = 481,
+        LoopDetected = 482,
+        TooManyHops = 483,
+        AddressIncomplete = 484,
+        Ambiguous = 485,
+        BusyHere = 486,
+        RequestTerminated = 487,
+        NotAcceptableHere = 488,
+        RequestPending = 491,
+        Undecipherable = 493,
+        InternalServerError = 500,
+        NotImplemented = 501,
+        BadGateway = 502,
+        ServiceUnavailable = 503,
+        ServerTimeout = 504,
+        SIPVersionNotSupported = 505,
+        MessageTooLarge = 513,
+        BusyEverywhere = 600,
+        Decline = 603,
+        DoesNotExistAnywhere = 604,
+        GlobalNotAcceptable = 606,
+    }
+);
diff --git a/src/uri.rs b/src/uri.rs
new file mode 100644
index 0000000..2d77df2
--- /dev/null
+++ b/src/uri.rs
@@ -0,0 +1,12 @@
+use std::fmt::Display;
+
+pub struct Uri {
+    pub content: String,
+}
+
+impl Display for Uri {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.content)?;
+        Ok(())
+    }
+}