ARES\_PARSE\_MX\_REPLY(3) Library Functions Manual ARES\_PARSE\_MX\_REPLY(3)

# [NAME](#NAME)

ares\_parse\_mx\_reply - Parse a reply to a DNS query of type MX

# [SYNOPSIS](#SYNOPSIS)

#include <ares.h>

int ares\_parse\_mx\_reply(const unsigned char* *abuf*, int *alen*,  
struct ares\_mx\_reply\** *mx\_out*);

# [DESCRIPTION](#DESCRIPTION)

The **ares\_parse\_mx\_reply** function parses the response to a query of type MX into a linked list of *struct ares\_mx\_reply* The parameters *abuf* and *alen* give the contents of the response. The result is stored in allocated memory and a pointer to it stored into the variable pointed to by *mx\_out*. It is the caller's responsibility to free the resulting *mx\_out* structure when it is no longer needed using the function [**ares\_free\_data(3)**](/man/os/c-ares/ares_free_data.3).

The structure *ares\_mx\_reply* contains the following fields:

```
struct ares_mx_reply {


    struct ares_mx_reply *next;


    char *host;


    unsigned short priority;
};
```

# [RETURN VALUES](#RETURN_VALUES)

**ares\_parse\_mx\_reply** can return any of the following values:

[**ARES\_SUCCESS**](#ARES_SUCCESS)

The response was successfully parsed.

[**ARES\_EBADRESP**](#ARES_EBADRESP)

The response was malformatted.

[**ARES\_ENODATA**](#ARES_ENODATA)

The response did not contain an answer to the query.

[**ARES\_ENOMEM**](#ARES_ENOMEM)

Memory was exhausted.

# [AVAILABILITY](#AVAILABILITY)

This function was first introduced in c-ares version 1.7.2.

# [SEE ALSO](#SEE_ALSO)

[**ares\_query**(3)](/man/os/c-ares/ares_query.3) [**ares\_free\_data**(3)](/man/os/c-ares/ares_free_data.3)

4 August 2009

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Document: ares_parse_mx_reply(3) from c-ares 1.34.8-r3 (Chainguard OS)
Source: https://github.com/c-ares/c-ares