proxmox-schema: add IP address regex/api-types

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

proxmox-schema/src/api_types.rs

@@ -3,10 +3,68 @@ use const_format::concatcp;
 
 use crate::{ApiStringFormat, Schema, StringSchema};
 
+#[rustfmt::skip]
+const IPV4OCTET: &str = r"(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9])?[0-9])";
+
+#[rustfmt::skip]
+const IPV6H16: &str = r"(?:[0-9a-fA-F]{1,4})";
+
+/// Returns the regular expression string to match IPv4 addresses
+#[rustfmt::skip]
+pub const IPV4RE_STR: &str = concatcp!(r"(?:(?:", IPV4OCTET, r"\.){3}", IPV4OCTET, ")");
+
+#[rustfmt::skip]
+const IPV6LS32: &str = concatcp!(r"(?:(?:", IPV4RE_STR, "|", IPV6H16, ":", IPV6H16, "))" );
+
+/// Returns the regular expression string to match IPv6 addresses
+#[rustfmt::skip]
+pub const IPV6RE_STR: &str = concatcp!(r"(?:",
+    r"(?:(?:",                                         r"(?:", IPV6H16, r":){6})", IPV6LS32, r")|",
+    r"(?:(?:",                                       r"::(?:", IPV6H16, r":){5})", IPV6LS32, r")|",
+    r"(?:(?:(?:",                         IPV6H16, r")?::(?:", IPV6H16, r":){4})", IPV6LS32, r")|",
+    r"(?:(?:(?:(?:", IPV6H16, r":){0,1}", IPV6H16, r")?::(?:", IPV6H16, r":){3})", IPV6LS32, r")|",
+    r"(?:(?:(?:(?:", IPV6H16, r":){0,2}", IPV6H16, r")?::(?:", IPV6H16, r":){2})", IPV6LS32, r")|",
+    r"(?:(?:(?:(?:", IPV6H16, r":){0,3}", IPV6H16, r")?::(?:", IPV6H16, r":){1})", IPV6LS32, r")|",
+    r"(?:(?:(?:(?:", IPV6H16, r":){0,4}", IPV6H16, r")?::",                   ")", IPV6LS32, r")|",
+    r"(?:(?:(?:(?:", IPV6H16, r":){0,5}", IPV6H16, r")?::",                   ")", IPV6H16,  r")|",
+    r"(?:(?:(?:(?:", IPV6H16, r":){0,6}", IPV6H16, r")?::",                                  ")))");
+
+/// Returns the regular expression string to match IP addresses (v4 or v6)
+#[rustfmt::skip]
+pub const IPRE_STR: &str = concatcp!(r"(?:", IPV4RE_STR, "|", IPV6RE_STR, ")");
+
+/// Regular expression string to match IP addresses where IPv6 addresses require brackets around
+/// them, while for IPv4 they are forbidden.
+#[rustfmt::skip]
+pub const IPRE_BRACKET_STR: &str = concatcp!(r"(?:", IPV4RE_STR, r"|\[(?:", IPV6RE_STR, r")\]", r")");
+
+#[rustfmt::skip]
+pub const CIDR_V4_REGEX_STR: &str = concatcp!(r"(?:", IPV4RE_STR, r"/\d{1,2})$");
+
+#[rustfmt::skip]
+pub const CIDR_V6_REGEX_STR: &str = concatcp!(r"(?:", IPV6RE_STR, r"/\d{1,3})$");
+
 #[rustfmt::skip]
 const SAFE_ID_REGEX_STR: &str = r"(?:[A-Za-z0-9_][A-Za-z0-9._\-]*)";
 
 const_regex! {
+    /// IPv4 regular expression.
+    pub IP_V4_REGEX = concatcp!(r"^", IPV4RE_STR, r"$");
+
+    /// IPv6 regular expression.
+    pub IP_V6_REGEX = concatcp!(r"^", IPV6RE_STR, r"$");
+
+    /// Regex to match IP addresses (V4 or V6)
+    pub IP_REGEX = concatcp!(r"^", IPRE_STR, r"$");
+
+    /// Regex to match IP addresses where IPv6 addresses require brackets around
+    /// them, while for IPv4 they are forbidden.
+    pub IP_BRACKET_REGEX = concatcp!(r"^", IPRE_BRACKET_STR, r"$");
+
+    pub CIDR_V4_REGEX = concatcp!(r"^", CIDR_V4_REGEX_STR, r"$");
+    pub CIDR_V6_REGEX = concatcp!(r"^", CIDR_V6_REGEX_STR, r"$");
+    pub CIDR_REGEX = concatcp!(r"^(?:", CIDR_V4_REGEX_STR, "|",  CIDR_V6_REGEX_STR, r")$");
+
     /// Regex for safe identifiers.
     ///
     /// This
@@ -36,3 +94,29 @@ pub const COMMENT_SCHEMA: Schema = StringSchema::new("Comment.")
     .format(&SINGLE_LINE_COMMENT_FORMAT)
     .max_length(128)
     .schema();
+
+#[test]
+fn test_regexes() {
+    assert!(IP_REGEX.is_match("127.0.0.1"));
+    assert!(IP_V4_REGEX.is_match("127.0.0.1"));
+    assert!(!IP_V6_REGEX.is_match("127.0.0.1"));
+
+    assert!(CIDR_V4_REGEX.is_match("127.0.0.1/24"));
+    assert!(CIDR_REGEX.is_match("127.0.0.1/24"));
+
+    assert!(IP_REGEX.is_match("::1"));
+    assert!(IP_REGEX.is_match("2014:b3a::27"));
+    assert!(IP_REGEX.is_match("2014:b3a::192.168.0.1"));
+    assert!(IP_REGEX.is_match("2014:b3a:0102:adf1:1234:4321:4afA:BCDF"));
+    assert!(!IP_V4_REGEX.is_match("2014:b3a:0102:adf1:1234:4321:4afA:BCDF"));
+    assert!(IP_V6_REGEX.is_match("2014:b3a:0102:adf1:1234:4321:4afA:BCDF"));
+
+    assert!(CIDR_V6_REGEX.is_match("2014:b3a:0102:adf1:1234:4321:4afA:BCDF/60"));
+    assert!(CIDR_REGEX.is_match("2014:b3a:0102:adf1:1234:4321:4afA:BCDF/60"));
+
+    assert!(IP_BRACKET_REGEX.is_match("127.0.0.1"));
+    assert!(IP_BRACKET_REGEX.is_match("[::1]"));
+    assert!(IP_BRACKET_REGEX.is_match("[2014:b3a::27]"));
+    assert!(IP_BRACKET_REGEX.is_match("[2014:b3a::192.168.0.1]"));
+    assert!(IP_BRACKET_REGEX.is_match("[2014:b3a:0102:adf1:1234:4321:4afA:BCDF]"));
+}