ares_parse_mx_reply - Parse a reply to a DNS query of type MX


#include <ares.h>

int ares_parse_mx_reply(const unsigned char* abuf, int alen,   struct ares_mx_reply** mx_out);


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.

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

ares_parse_mx_reply can return any of the following values:

ARES_SUCCESS The response was successfully parsed.

ARES_EBADRESP The response was malformatted.

ARES_ENODATA The response did not contain an answer to the query.

ARES_ENOMEM Memory was exhausted.


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

See also

ares_query(3) ares_free_data(3)


Written by Jeremy Lal <>

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