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== Domain Name System | == Domain Name System == | ||
=== Resolving using <code>getaddrinfo()</code> in applications | === Resolving using <code>getaddrinfo()</code> in applications === | ||
The <code>getaddrinfo()</code> function is a dualstack-friendly API to name | The <code>getaddrinfo()</code> function is a dualstack-friendly API to name | ||
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<pre> | <pre> | ||
const char *node = "www.fedoraproject.org"; | |||
const char *service = "http"; | |||
struct addrinfo hints = { | |||
.ai_family = AF_UNSPEC, | |||
.ai_socktype = SOCK_DGRAM, | |||
.ai_flags = 0, | |||
.ai_protocol = 0, | |||
.ai_canonname = NULL, | |||
.ai_addr = NULL, | |||
.ai_next = NULL | |||
}; | |||
struct addrinfo *result; | |||
int error; | int error; | ||
error = getaddrinfo(node, service, &hints, &result) | error = getaddrinfo(node, service, &hints, &result) | ||
</pre> | </pre> | ||
Revision as of 20:03, 21 November 2012
Domain Name System
Resolving using getaddrinfo() in applications
The getaddrinfo() function is a dualstack-friendly API to name
resolution. It is used by applications to translate host and
service names to a linked list of struct addrinfo
objects.
And example of getaddrinfo() call:
const char *node = "www.fedoraproject.org";
const char *service = "http";
struct addrinfo hints = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_DGRAM,
.ai_flags = 0,
.ai_protocol = 0,
.ai_canonname = NULL,
.ai_addr = NULL,
.ai_next = NULL
};
struct addrinfo *result;
int error;
error = getaddrinfo(node, service, &hints, &result)