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Make mailer SMTP check have timed context (#24751) #24759

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merged 1 commit into from
May 17, 2023
Merged

Make mailer SMTP check have timed context (#24751) #24759

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16 changes: 9 additions & 7 deletions modules/setting/mailer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
package setting

import (
"context"
"net"
"net/mail"
"strings"
Expand Down Expand Up @@ -198,7 +199,7 @@ func loadMailerFrom(rootCfg ConfigProvider) {
ips := tryResolveAddr(MailService.SMTPAddr)
if MailService.Protocol == "smtp" {
for _, ip := range ips {
if !ip.IsLoopback() {
if !ip.IP.IsLoopback() {
log.Warn("connecting over insecure SMTP protocol to non-local address is not recommended")
break
}
Expand Down Expand Up @@ -258,20 +259,21 @@ func loadNotifyMailFrom(rootCfg ConfigProvider) {
log.Info("Notify Mail Service Enabled")
}

func tryResolveAddr(addr string) []net.IP {
func tryResolveAddr(addr string) []net.IPAddr {
if strings.HasPrefix(addr, "[") && strings.HasSuffix(addr, "]") {
addr = addr[1 : len(addr)-1]
}
ip := net.ParseIP(addr)
if ip != nil {
ips := make([]net.IP, 1)
ips[0] = ip
return ips
return []net.IPAddr{{IP: ip}}
}
ips, err := net.LookupIP(addr)

ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
ips, err := net.DefaultResolver.LookupIPAddr(ctx, addr)
if err != nil {
log.Warn("could not look up mailer.SMTP_ADDR: %v", err)
return make([]net.IP, 0)
return nil
}
return ips
}