Prepare rust-ssl to merge into rust-openssl

1 files changed, 59 insertions, 0 deletions

diff --git a/ssl/error.rs b/ssl/error.rs
new file mode 100644
index 00000000..769cc768
--- /dev/null
+++ b/ssl/error.rs
@@ -0,0 +1,59 @@
+use std::libc::c_ulong;
+
+use super::ffi;
+
+/// An SSL error
+#[deriving(ToStr)]
+pub enum SslError {
+    /// The underlying stream has reported an EOF
+    StreamEof,
+    /// The SSL session has been closed by the other end
+    SslSessionClosed,
+    /// An error in the OpenSSL library
+    OpenSslErrors(~[OpensslError])
+}
+
+/// An error from the OpenSSL library
+#[deriving(ToStr)]
+pub enum OpensslError {
+    /// An unknown error
+    UnknownError {
+        /// The library reporting the error
+        library: u8,
+        /// The function reporting the error
+        function: u16,
+        /// The reason for the error
+        reason: u16
+    }
+}
+
+fn get_lib(err: c_ulong) -> u8 {
+    ((err >> 24) & 0xff) as u8
+}
+
+fn get_func(err: c_ulong) -> u16 {
+    ((err >> 12) & 0xfff) as u16
+}
+
+fn get_reason(err: c_ulong) -> u16 {
+    (err & 0xfff) as u16
+}
+
+impl SslError {
+    /// Creates a new `OpenSslErrors` with the current contents of the error
+    /// stack.
+    pub fn get() -> SslError {
+        let mut errs = ~[];
+        loop {
+            match unsafe { ffi::ERR_get_error() } {
+                0 => break,
+                err => errs.push(UnknownError {
+                    library: get_lib(err),
+                    function: get_func(err),
+                    reason: get_reason(err)
+                })
+            }
+        }
+        OpenSslErrors(errs)
+    }
+}