NetworkManager/libnm/nm-dns-manager.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2016 Red Hat, Inc.
 */

#include "libnm/nm-default-libnm.h"

#include "nm-dns-manager.h"

#include "nm-dbus-interface.h"
#include "nm-connection.h"
#include "nm-client.h"
#include "nm-object-private.h"
#include "nm-dbus-helpers.h"
#include "libnm-core-intern/nm-core-internal.h"

/*****************************************************************************
 * NMDnsEntry
 *****************************************************************************/

G_DEFINE_BOXED_TYPE(NMDnsEntry, nm_dns_entry, nm_dns_entry_dup, nm_dns_entry_unref)

struct NMDnsEntry {
    guint refcount;

    char *   interface;
    char **  nameservers;
    char **  domains;
    int      priority;
    gboolean vpn;
};

/**
 * nm_dns_entry_new:
 *
 * Creates a new #NMDnsEntry object.
 *
 * Returns: (transfer full): the new #NMDnsEntry object, or %NULL on error
 **/
NMDnsEntry *
nm_dns_entry_new(const char *       interface,
                 const char *const *nameservers,
                 const char *const *domains,
                 int                priority,
                 gboolean           vpn)
{
    NMDnsEntry *entry;
    guint       i, len;

    entry           = g_slice_new0(NMDnsEntry);
    entry->refcount = 1;

    entry->interface = g_strdup(interface);

    if (nameservers) {
        len                = g_strv_length((char **) nameservers);
        entry->nameservers = g_new(char *, len + 1);
        for (i = 0; i < len + 1; i++)
            entry->nameservers[i] = g_strdup(nameservers[i]);
    }

    if (domains) {
        len            = g_strv_length((char **) domains);
        entry->domains = g_new(char *, len + 1);
        for (i = 0; i < len + 1; i++)
            entry->domains[i] = g_strdup(domains[i]);
    }

    entry->priority = priority;
    entry->vpn      = vpn;

    return entry;
}

/**
 * nm_dns_entry_dup:
 * @entry: the #NMDnsEntry
 *
 * Creates a copy of @entry
 *
 * Returns: (transfer full): a copy of @entry
 **/
NMDnsEntry *
nm_dns_entry_dup(NMDnsEntry *entry)
{
    NMDnsEntry *copy;

    g_return_val_if_fail(entry != NULL, NULL);
    g_return_val_if_fail(entry->refcount > 0, NULL);

    copy = nm_dns_entry_new(entry->interface,
                            (const char *const *) entry->nameservers,
                            (const char *const *) entry->domains,
                            entry->priority,
                            entry->vpn);

    return copy;
}

/**
 * nm_dns_entry_unref:
 * @entry: the #NMDnsEntry
 *
 * Decreases the reference count of the object.  If the reference count
 * reaches zero, the object will be destroyed.
 *
 * Since: 1.6
 **/
void
nm_dns_entry_unref(NMDnsEntry *entry)
{
    g_return_if_fail(entry != NULL);
    g_return_if_fail(entry->refcount > 0);

    entry->refcount--;
    if (entry->refcount == 0) {
        g_free(entry->interface);
        g_strfreev(entry->nameservers);
        g_strfreev(entry->domains);
        g_slice_free(NMDnsEntry, entry);
    }
}

/**
 * nm_dns_entry_get_interface:
 * @entry: the #NMDnsEntry
 *
 * Gets the interface on which name servers are contacted.
 *
 * Returns: (transfer none): the interface name
 *
 * Since: 1.6
 **/
const char *
nm_dns_entry_get_interface(NMDnsEntry *entry)
{
    g_return_val_if_fail(entry, 0);
    g_return_val_if_fail(entry->refcount > 0, 0);

    return entry->interface;
}

/**
 * nm_dns_entry_get_nameservers:
 * @entry: the #NMDnsEntry
 *
 * Gets the list of name servers for this entry.
 *
 * Returns: (transfer none): the list of name servers
 *
 * Since: 1.6
 **/
const char *const *
nm_dns_entry_get_nameservers(NMDnsEntry *entry)
{
    g_return_val_if_fail(entry, 0);
    g_return_val_if_fail(entry->refcount > 0, 0);

    return (const char *const *) entry->nameservers;
}

/**
 * nm_dns_entry_get_domains:
 * @entry: the #NMDnsEntry
 *
 * Gets the list of DNS domains.
 *
 * Returns: (transfer none): the list of DNS domains
 *
 * Since: 1.6
 **/
const char *const *
nm_dns_entry_get_domains(NMDnsEntry *entry)
{
    g_return_val_if_fail(entry, 0);
    g_return_val_if_fail(entry->refcount > 0, 0);

    return (const char *const *) entry->domains;
}

/**
 * nm_dns_entry_get_vpn:
 * @entry: the #NMDnsEntry
 *
 * Gets whether the entry refers to VPN name servers.
 *
 * Returns: %TRUE if the entry refers to VPN name servers
 *
 * Since: 1.6
 **/
gboolean
nm_dns_entry_get_vpn(NMDnsEntry *entry)
{
    g_return_val_if_fail(entry, 0);
    g_return_val_if_fail(entry->refcount > 0, 0);

    return entry->vpn;
}

/**
 * nm_dns_entry_get_priority:
 * @entry: the #NMDnsEntry
 *
 * Gets the priority of the entry
 *
 * Returns: the priority of the entry
 *
 * Since: 1.6
 **/
int
nm_dns_entry_get_priority(NMDnsEntry *entry)
{
    g_return_val_if_fail(entry, 0);
    g_return_val_if_fail(entry->refcount > 0, 0);

    return entry->priority;
}