Function validate_hostname 

pub fn validate_hostname(hostname: &str) -> Result<String>

Sanitize a hostname to prevent injection attacks.

This function validates that hostnames conform to RFC 1123 and don’t contain characters that could be used for command injection.

Arguments

• hostname - The hostname string to validate

Returns

Returns the validated hostname if validation succeeds.

Errors

Returns an error if:

• Hostname is empty
• Hostname is too long (>253 characters, per RFC 1123)
• Hostname contains invalid characters
• Hostname contains suspicious patterns

Examples

use bssh::shared::validation::validate_hostname;

// Valid hostnames
assert!(validate_hostname("example.com").is_ok());
assert!(validate_hostname("192.168.1.1").is_ok());
assert!(validate_hostname("[::1]").is_ok());

// Invalid hostnames
assert!(validate_hostname("example..com").is_err());
assert!(validate_hostname("example.com; ls").is_err());