tailscale.c File Reference

Tailscale host identity helpers. More...

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Functions
bool	is_tailscale_host (const char *address)
	Determine whether an address belongs to the local Tailscale tailnet.

Detailed Description

Tailscale host identity helpers.

Definition in file tailscale.c.

Function Documentation

is_tailscale_host()

bool is_tailscale_host

(

const char *

address

)

Determine whether an address belongs to the local Tailscale tailnet.

A fully-qualified .ts.net name is accepted directly. Literal IP addresses are reverse-resolved, while short hostnames are forward-resolved and then reverse-checked. The resolved name must end in .ts.net.

Definition at line 63 of file tailscale.c.

                                            {
  if (!address || !address[0]) {
    return false;
  }
  if (is_tailscale_hostname(address)) {
    return true;
  }
 
  bool is_numeric = is_valid_ipv4(address) || is_valid_ipv6(address);
  bool is_short_hostname = !is_numeric && strchr(address, '.') == NULL;
  return (is_numeric || is_short_hostname) && address_resolves_to_tailscale(address, is_numeric);
}

References is_valid_ipv4(), and is_valid_ipv6().