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|
package autoconfig
import (
"context"
"net"
"sort"
"strings"
"sync"
"git.sr.ht/~rjarry/aerc/lib/log"
)
func guessMX(ctx context.Context, localpart, domain string, result chan *Config) {
defer log.PanicHandler()
defer close(result)
res := make(chan *Config)
go func(res chan *Config) {
defer log.PanicHandler()
defer close(res)
var imapConfig, smtpConfig *Credentials
var wg sync.WaitGroup
records, err := lookupMX(domain)
if err != nil || len(records) == 0 {
return
}
sort.Slice(records, func(a, b int) bool { return records[a].Pref < records[b].Pref })
mailserver := records[0].Host
mailserver = strings.TrimSuffix(mailserver, ".")
wg.Add(2)
go func() {
defer log.PanicHandler()
defer wg.Done()
imapConfig = tryPort(mailserver, []portEncryption{{143, EncryptionSTARTTLS}, {993, EncryptionTLS}})
}()
go func() {
defer log.PanicHandler()
defer wg.Done()
smtpConfig = tryPort(mailserver, []portEncryption{{587, EncryptionSTARTTLS}, {465, EncryptionTLS}})
}()
wg.Wait()
if imapConfig == nil || smtpConfig == nil {
return
}
log.Debugf("found MX records: %v %v", imapConfig, smtpConfig)
imapConfig.Username = localpart + "@" + domain
smtpConfig.Username = localpart + "@" + domain
res <- &Config{
Found: ProtocolIMAP,
IMAP: *imapConfig,
SMTP: *smtpConfig,
}
}(res)
select {
case r, next := <-res:
if next {
result <- r
}
case <-ctx.Done():
}
}
var lookupMX = net.LookupMX
|
