mirror of https://github.com/TakeV-Lambda/dino.git
90 lines
3.9 KiB
Vala
90 lines
3.9 KiB
Vala
namespace Xmpp {
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private class SrvTargetInfo {
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public string host { get; set; }
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public uint16 port { get; set; }
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public string service { get; set; }
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public uint16 priority { get; set; }
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}
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public class XmppStreamResult {
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public TlsXmppStream? stream { get; set; }
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public TlsCertificateFlags? tls_errors { get; set; }
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public IOError? io_error { get; set; }
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}
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public async XmppStreamResult establish_stream(Jid bare_jid, Gee.List<XmppStreamModule> modules, string? log_options, owned TlsXmppStream.OnInvalidCert on_invalid_cert) {
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Jid remote = bare_jid.domain_jid;
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TlsXmppStream.OnInvalidCertWrapper on_invalid_cert_wrapper = new TlsXmppStream.OnInvalidCertWrapper(on_invalid_cert);
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//Lookup xmpp-client and xmpps-client SRV records
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GLib.List<SrvTargetInfo>? targets = new GLib.List<SrvTargetInfo>();
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GLibFixes.Resolver resolver = GLibFixes.Resolver.get_default();
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try {
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GLib.List<SrvTarget> xmpp_services = yield resolver.lookup_service_async("xmpp-client", "tcp", remote.to_string(), null);
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foreach (SrvTarget service in xmpp_services) {
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targets.append(new SrvTargetInfo() { host=service.get_hostname(), port=service.get_port(), service="xmpp-client", priority=service.get_priority()});
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}
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} catch (Error e) {
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debug("Got no xmpp-client DNS records for %s: %s", remote.to_string(), e.message);
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}
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try {
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GLib.List<SrvTarget> xmpp_services = yield resolver.lookup_service_async("xmpps-client", "tcp", remote.to_string(), null);
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foreach (SrvTarget service in xmpp_services) {
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targets.append(new SrvTargetInfo() { host=service.get_hostname(), port=service.get_port(), service="xmpps-client", priority=service.get_priority()});
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}
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} catch (Error e) {
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debug("Got no xmpps-client DNS records for %s: %s", remote.to_string(), e.message);
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}
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targets.sort((a, b) => {
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return a.priority - b.priority;
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});
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// Add fallback connection
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bool should_add_fallback = true;
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foreach (SrvTargetInfo target in targets) {
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if (target.service == "xmpp-client" && target.port == 5222 && target.host == remote.to_string()) {
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should_add_fallback = false;
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}
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}
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if (should_add_fallback) {
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targets.append(new SrvTargetInfo() { host=remote.to_string(), port=5222, service="xmpp-client", priority=uint16.MAX});
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}
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// Try all connection options from lowest to highest priority
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TlsXmppStream? stream = null;
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TlsCertificateFlags? tls_errors = null;
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IOError? io_error = null;
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foreach (SrvTargetInfo target in targets) {
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try {
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if (target.service == "xmpp-client") {
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stream = new StartTlsXmppStream(remote, target.host, target.port, on_invalid_cert_wrapper);
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} else {
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stream = new DirectTlsXmppStream(remote, target.host, target.port, on_invalid_cert_wrapper);
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}
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stream.log = new XmppLog(bare_jid.to_string(), log_options);
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foreach (XmppStreamModule module in modules) {
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stream.add_module(module);
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}
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yield stream.connect();
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return new XmppStreamResult() { stream=stream };
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} catch (IOError e) {
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warning("Could not establish XMPP session with %s:%i: %s", target.host, target.port, e.message);
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if (stream != null) {
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if (stream.errors != null) {
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tls_errors = stream.errors;
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}
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io_error = e;
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stream.detach_modules();
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}
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}
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}
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return new XmppStreamResult() { io_error=io_error, tls_errors=tls_errors };
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}
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} |