4352050b04
The client might close the connection before the server noticed. So we simply ignore the error thrown by the shutdown operation.
54 lines
2.2 KiB
Rust
54 lines
2.2 KiB
Rust
use log::{debug, warn};
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use tls_parser::{
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parse_tls_extensions, parse_tls_raw_record, parse_tls_record_with_header, TlsMessage,
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TlsMessageHandshake,
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};
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pub fn get_sni(buf: &[u8]) -> Vec<String> {
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let mut snis: Vec<String> = Vec::new();
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match parse_tls_raw_record(buf) {
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Ok((_, ref r)) => match parse_tls_record_with_header(r.data, &r.hdr) {
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Ok((_, ref msg_list)) => {
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for msg in msg_list {
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if let TlsMessage::Handshake(TlsMessageHandshake::ClientHello(ref content)) =
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*msg
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{
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debug!("TLS ClientHello version: {}", content.version);
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let ext = parse_tls_extensions(content.ext.unwrap_or(b""));
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match ext {
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Ok((_, ref extensions)) => {
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for ext in extensions {
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if let tls_parser::TlsExtension::SNI(ref v) = *ext {
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for &(t, sni) in v {
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match String::from_utf8(sni.to_vec()) {
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Ok(s) => {
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debug!("TLS SNI: {} {}", t, s);
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snis.push(s);
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}
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Err(e) => {
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warn!("Failed to parse SNI: {} {}", t, e);
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}
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}
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}
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}
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}
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}
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Err(e) => {
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warn!("TLS extensions error: {}", e);
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}
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}
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}
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}
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}
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Err(err) => {
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warn!("Failed to parse TLS: {}", err);
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}
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},
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Err(err) => {
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warn!("Failed to parse TLS: {}", err);
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}
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}
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snis
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}
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