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Full Discussion: TXT Records: Usage
Special Forums IP Networking TXT Records: Usage Post 302886139 by Lost in Cyberia on Wednesday 29th of January 2014 08:24:15 PM
Old 01-29-2014
TXT Records: Usage

Ok..the last DNS question. I've been on a DNS kick lately. So when poking around, I keep bumping sites that have txt records all with cryptic, but yet similar text in them.. Something like:

Code:
cnn.com.		3305	IN	TXT	"882269757-4422010"
cnn.com.		3305	IN	TXT	"ms=ms97284866"
cnn.com.		3305	IN	TXT	"688162515-4422037"


What are these for? I keep getting referred to SPF for sending email, but it doesn't seem right.. who looks at these numbers? CNN alone has like 25 TXT records all with these types of numbers.
 

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TXTRecordCreate(3DNS_SD)			      DNS Service Discovery Library Functions				  TXTRecordCreate(3DNS_SD)

NAME
TXTRecordCreate, TXTRecordDeallocate, TXTRecordSetValue, TXTRecordRemoveValue, TXTRecordGetLength, TXTRecordGetBytesPtr, TXTRecordCon- tainsKey, TXTRecordGetValuePtr, TXTRecordGetCount, TXTRecordGetItemAtIndex - DNS TXT record manipulation functions SYNOPSIS
cc [ flag ... ] file ... -ldns_sd [ library ... ] #include <dns_sd.h> void TXTRecordCreate(TXTRecordRef *txtRecord, uint16_t bufferLen, void *buffer); void TXTRecordDeallocate(TXTRecordRef*txtRecord); DNSServiceErrorType txtRecord(TXTRecordRef *txtRecord, const char *key, uint8_t valueSize, const void *value); DNSServiceErrorType TXTRecordRemoveValue(TXTRecordRef *txtRecord, const char *key); uint16_t TXTRecordGetLength(const TXTRecordRef *txtRecord); const void *TXTRecordGetBytesPtr(const TXTRecordRef *txtRecord); int *TXTRecordContainsKey(uint16_t *txtLen, const void *txtRecord, const char *key); const void *TXTRecordGetValuePtr(uint16_t *txtLen, const void *txtRecord, const char *key, uint8_t *valueLen); uint16_t *TXTRecordGetCount(uint16_t *txtLen, const void *txtRecord); DNSServiceErrorType TXTRecordGetItemAtIndex(uint16_t *txtLen, const void *txtRecord, uint16_t *index, uint16_t *keyBufLen, char *key, uint8_t *valueLen, const void **value); DESCRIPTION
These functions in the libdns_sd library allow applications to create and to manipulate TXT resource records. TXT resource records enable applications to include service specific information, other than a host name and port number, as part of the service registration. ATTRIBUTES
See attributes(5) for description of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) SunOS 5.11 20 Aug 2007 TXTRecordCreate(3DNS_SD)
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