diff options
| -rw-r--r-- | core/s2smanager.lua | 37 | ||||
| -rw-r--r-- | net/dns.lua | 1 |
2 files changed, 32 insertions, 6 deletions
diff --git a/core/s2smanager.lua b/core/s2smanager.lua index c7eb9578..b930ceab 100644 --- a/core/s2smanager.lua +++ b/core/s2smanager.lua @@ -246,6 +246,11 @@ function attempt_connection(host_session, err) for _, record in ipairs(answer) do t_insert(srv_hosts, record.srv); end + if #srv_hosts == 1 and srv_hosts[1].target == "." then + log("debug", to_host.." does not provide a XMPP service"); + destroy_session(host_session, err); -- Nothing to see here + return; + end t_sort(srv_hosts, compare_srv_priorities); local srv_choice = srv_hosts[1]; @@ -347,9 +352,19 @@ function try_connect(host_session, connect_host, connect_port, err) end if has_other then - rfc3484_dest(host_session.ip_hosts, sources); - host_session.ip_choice = 0; - try_next_ip(host_session, connect_port); + if #IPs > 0 then + rfc3484_dest(host_session.ip_hosts, sources); + host_session.ip_choice = 0; + try_next_ip(host_session, connect_port); + else + log("debug", "DNS lookup failed to get a response for %s", connect_host); + host_session.ip_hosts = nil; + if not attempt_connection(host_session, "name resolution failed") then -- Retry if we can + log("debug", "No other records to try for %s - destroying", host_session.to_host); + err = err and (": "..err) or ""; + destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't + end + end else has_other = true; end @@ -366,9 +381,19 @@ function try_connect(host_session, connect_host, connect_port, err) end if has_other then - rfc3484_dest(host_session.ip_hosts, sources); - host_session.ip_choice = 0; - try_next_ip(host_session, connect_port); + if #IPs > 0 then + rfc3484_dest(host_session.ip_hosts, sources); + host_session.ip_choice = 0; + try_next_ip(host_session, connect_port); + else + log("debug", "DNS lookup failed to get a response for %s", connect_host); + host_session.ip_hosts = nil; + if not attempt_connection(host_session, "name resolution failed") then -- Retry if we can + log("debug", "No other records to try for %s - destroying", host_session.to_host); + err = err and (": "..err) or ""; + destroy_session(host_session, "DNS resolution failed"..err); -- End of the line, we can't + end + end else has_other = true; end diff --git a/net/dns.lua b/net/dns.lua index 8f428476..5b32a56c 100644 --- a/net/dns.lua +++ b/net/dns.lua @@ -358,6 +358,7 @@ function resolver:name() -- - - - - - - - - - - - - - - - - - - - - - name local remember, pointers = nil, 0; local len = self:byte(); local n = {}; + if len == 0 then return "." end -- Root label while len > 0 do if len >= 0xc0 then -- name is "compressed" pointers = pointers + 1; |