70 lines
2.3 KiB
Go
70 lines
2.3 KiB
Go
package utils
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import (
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"fmt"
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"strings"
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"github.com/go-redis/redis/v8"
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"github.com/sirupsen/logrus"
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)
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//GetRecord : Check the SQL and REDIS database for a Record.
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//A Record struct is used as input and output
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func GetRecord(entry Record) Record {
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//Check for strict record in Redis cache
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redisKey := entry.Fqdn + "--" + fmt.Sprint(entry.Qtype)
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result, redisErr := redisCheckForRecord(redisKey, entry)
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var sqlErr bool //The err returned for sqlCheckForRecord or sqlCheckForReverse6Wildcard
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//If reverse DNS
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reverseCheck := IsReverse(entry.Fqdn)
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if reverseCheck > 0 {
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//If reverse record not found in redis
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if redisErr == redis.Nil {
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//Check for it in the SQL database
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logrus.Debug("QUERIES : Check for strict reverse in MySQL")
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result, sqlErr = sqlCheckForRecord(redisKey, entry.Fqdn, entry)
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if sqlErr {
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//Check for wildcard reverse in the SQL
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logrus.Debug("QUERIES : Check for wildcard reverse in MySQL")
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result, _ = sqlCheckForReverse6Wildcard(redisKey, entry.Fqdn, entry)
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}
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}
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//For dynamic reverse dns
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//Check for it by looking for a "%s" in the record content
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//If true, replace it with the formated IP
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if strings.Contains(result.Content, "%s") {
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record := ExtractAddressFromReverse(entry.Fqdn)
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var recordFormated string
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if reverseCheck == 1 {
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recordFormated = strings.ReplaceAll(record, ".", "-")
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} else {
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recordFormated = strings.ReplaceAll(record, ":", "-")
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}
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result.Content = fmt.Sprintf(result.Content, recordFormated)
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}
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} else if redisErr == redis.Nil { //If strict record NOT in Redis cache & not Reverse
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//Check for wildcard in Redis cache
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logrus.Debug("QUERIES : Check for wildcard in redis cache")
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mainDomainKey := fmt.Sprintf("*%s", entry.Fqdn[strings.Index(entry.Fqdn, "."):]) //Remove the last subdomain
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redismdKey := fmt.Sprintf("%s--%v", mainDomainKey, entry.Qtype)
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result, redisErr = redisCheckForRecord(redismdKey, entry)
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//If none of both check in mysql
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if redisErr == redis.Nil {
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//Check for strict record in mysql
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logrus.Debug("QUERIES : Check for strict record in MSQL")
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result, sqlErr = sqlCheckForRecord(redisKey, entry.Fqdn, entry)
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if sqlErr {
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//Check for wildcard record in mysql
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logrus.Debug("QUERIES : Check for wildcard in MSQL")
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result, _ = sqlCheckForRecord(redismdKey, fmt.Sprint(mainDomainKey), entry)
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}
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}
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}
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return result
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}
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