## NMConnection NMConnection — Describes a connection to specific network or provider |

## Synopsis

    #define             NM_CONNECTION_SECRETS_UPDATED
    #define             NM_CONNECTION_SECRETS_CLEARED
    #define             NM_CONNECTION_CHANGED
    #define             NM_CONNECTION_NORMALIZE_PARAM_IP6_CONFIG_METHOD
                        NMConnectionInterface;
    void                nm_connection_add_setting           (NMConnection *connection,
                                                             NMSetting *setting);
    void                nm_connection_remove_setting        (NMConnection *connection,
                                                             GType setting_type);
    NMSetting *         nm_connection_get_setting           (NMConnection *connection,
                                                             GType setting_type);
    NMSetting *         nm_connection_get_setting_by_name   (NMConnection *connection,
                                                             const char *name);
    #define             NM_VARIANT_TYPE_SETTING
    enum                NMConnectionSerializationFlags;
    GVariant *          nm_connection_to_dbus               (NMConnection *connection,
                                                             NMConnectionSerializationFlags flags);
    gboolean            nm_connection_replace_settings      (NMConnection *connection,
                                                             GVariant *new_settings,
                                                             GError **error);
    void                nm_connection_replace_settings_from_connection
                                                            (NMConnection *connection,
                                                             NMConnection *new_connection);
    void                nm_connection_clear_settings        (NMConnection *connection);
    gboolean            nm_connection_compare               (NMConnection *a,
                                                             NMConnection *b,
                                                             NMSettingCompareFlags flags);
    gboolean            nm_connection_diff                  (NMConnection *a,
                                                             NMConnection *b,
                                                             NMSettingCompareFlags flags,
                                                             GHashTable **out_settings);
    gboolean            nm_connection_verify                (NMConnection *connection,
                                                             GError **error);
    gboolean            nm_connection_normalize             (NMConnection *connection,
                                                             GHashTable *parameters,
                                                             gboolean *modified,
                                                             GError **error);
    const char *        nm_connection_need_secrets          (NMConnection *connection,
                                                             GPtrArray **hints);
    void                nm_connection_clear_secrets         (NMConnection *connection);
    void                nm_connection_clear_secrets_with_flags
                                                            (NMConnection *connection,
                                                             NMSettingClearSecretsWithFlagsFn func,
                                                             gpointer user_data);
    gboolean            nm_connection_update_secrets        (NMConnection *connection,
                                                             const char *setting_name,
                                                             GVariant *secrets,
                                                             GError **error);
    void                nm_connection_set_path              (NMConnection *connection,
                                                             const char *path);
    const char *        nm_connection_get_path              (NMConnection *connection);
    const char *        nm_connection_get_interface_name    (NMConnection *connection);
    gboolean            nm_connection_is_type               (NMConnection *connection,
                                                             const char *type);
    void                nm_connection_for_each_setting_value
                                                            (NMConnection *connection,
                                                             NMSettingValueIterFn func,
                                                             gpointer user_data);
    void                nm_connection_dump                  (NMConnection *connection);
    const char *        nm_connection_get_uuid              (NMConnection *connection);
    const char *        nm_connection_get_id                (NMConnection *connection);
    const char *        nm_connection_get_connection_type   (NMConnection *connection);
    gboolean            nm_connection_is_virtual            (NMConnection *connection);
    char *              nm_connection_get_virtual_device_description
                                                            (NMConnection *connection);
    NMSetting8021x *    nm_connection_get_setting_802_1x    (NMConnection *connection);
    NMSettingBluetooth * nm_connection_get_setting_bluetooth
                                                            (NMConnection *connection);
    NMSettingBond *     nm_connection_get_setting_bond      (NMConnection *connection);
    NMSettingTeam *     nm_connection_get_setting_team      (NMConnection *connection);
    NMSettingTeamPort * nm_connection_get_setting_team_port (NMConnection *connection);
    NMSettingBridge *   nm_connection_get_setting_bridge    (NMConnection *connection);
    NMSettingBridgePort * nm_connection_get_setting_bridge_port
                                                            (NMConnection *connection);
    NMSettingCdma *     nm_connection_get_setting_cdma      (NMConnection *connection);
    NMSettingConnection * nm_connection_get_setting_connection
                                                            (NMConnection *connection);
    NMSettingDcb *      nm_connection_get_setting_dcb       (NMConnection *connection);
    NMSettingGeneric *  nm_connection_get_setting_generic   (NMConnection *connection);
    NMSettingGsm *      nm_connection_get_setting_gsm       (NMConnection *connection);
    NMSettingInfiniband * nm_connection_get_setting_infiniband
                                                            (NMConnection *connection);
    NMSettingIPConfig * nm_connection_get_setting_ip4_config
                                                            (NMConnection *connection);
    NMSettingIPConfig * nm_connection_get_setting_ip6_config
                                                            (NMConnection *connection);
    NMSettingOlpcMesh * nm_connection_get_setting_olpc_mesh (NMConnection *connection);
    NMSettingPpp *      nm_connection_get_setting_ppp       (NMConnection *connection);
    NMSettingPppoe *    nm_connection_get_setting_pppoe     (NMConnection *connection);
    NMSettingSerial *   nm_connection_get_setting_serial    (NMConnection *connection);
    NMSettingVpn *      nm_connection_get_setting_vpn       (NMConnection *connection);
    NMSettingWimax *    nm_connection_get_setting_wimax     (NMConnection *connection);
    NMSettingAdsl *     nm_connection_get_setting_adsl      (NMConnection *connection);
    NMSettingWired *    nm_connection_get_setting_wired     (NMConnection *connection);
    NMSettingWireless * nm_connection_get_setting_wireless  (NMConnection *connection);
    NMSettingWirelessSecurity * nm_connection_get_setting_wireless_security
                                                            (NMConnection *connection);
    NMSettingVlan *     nm_connection_get_setting_vlan      (NMConnection *connection);

## Object Hierarchy

      GFlags
       +----NMConnectionSerializationFlags

## Description

An NMConnection describes all the settings and configuration values that are necessary to configure network devices for operation on a specific network. Connections are the fundamental operating object for NetworkManager; no device is connected without a NMConnection, or disconnected without having been connected with a NMConnection.

Each NMConnection contains a list of NMSetting objects usually referenced by name (using `nm_connection_get_setting_by_name()`) or by type (with `nm_connection_get_setting()`). The settings describe the actual parameters with which the network devices are configured, including device-specific parameters (MTU, SSID, APN, channel, rate, etc) and IP-level parameters (addresses, routes, addressing methods, etc).

## Details

### NM_CONNECTION_SECRETS_UPDATED

    #define NM_CONNECTION_SECRETS_UPDATED "secrets-updated"

### NM_CONNECTION_SECRETS_CLEARED

    #define NM_CONNECTION_SECRETS_CLEARED "secrets-cleared"

### NM_CONNECTION_CHANGED

    #define NM_CONNECTION_CHANGED         "changed"

### NM_CONNECTION_NORMALIZE_PARAM_IP6_CONFIG_METHOD

    #define NM_CONNECTION_NORMALIZE_PARAM_IP6_CONFIG_METHOD "ip6-config-method"

### NMConnectionInterface

    typedef struct {
    	GTypeInterface parent;

    	/* Signals */
    	void (*secrets_updated) (NMConnection *connection,
    	                         const char   *setting);
    	void (*secrets_cleared) (NMConnection *connection);
    	void (*changed)         (NMConnection *connection);
    } NMConnectionInterface;

GTypeInterface `parent`; | the parent interace struct
`secrets_updated` () | emitted when the connection's secrets are updated
`secrets_cleared` () | emitted when the connection's secrets are cleared
`changed` () | emitted when any change to the connection's settings occurs

### nm_connection_add_setting ()

    void                nm_connection_add_setting           (NMConnection *connection,
                                                             NMSetting *setting);

Adds a NMSetting to the connection, replacing any previous NMSetting of the same name which has previously been added to the NMConnection. The connection takes ownership of the NMSetting object and does not increase the setting object's reference count.

`connection` : | a NMConnection
`setting` : | the NMSetting to add to the connection object. [transfer full]

### nm_connection_remove_setting ()

    void                nm_connection_remove_setting        (NMConnection *connection,
                                                             GType setting_type);

Removes the NMSetting with the given GType from the NMConnection. This operation dereferences the NMSetting object.

`connection` : | a NMConnection
`setting_type` : | the GType of the setting object to remove

### nm_connection_get_setting ()

    NMSetting *         nm_connection_get_setting           (NMConnection *connection,
                                                             GType setting_type);

Gets the NMSetting with the given GType, if one has been previously added to the NMConnection.

`connection` : | a NMConnection
`setting_type` : | the GType of the setting object to return
Returns : | the NMSetting, or `NULL` if no setting of that type was previously added to the NMConnection. [transfer none]

### nm_connection_get_setting_by_name ()

    NMSetting *         nm_connection_get_setting_by_name   (NMConnection *connection,
                                                             const char *name);

Gets the NMSetting with the given name, if one has been previously added the NMConnection.

`connection` : | a NMConnection
`name` : | a setting name
Returns : | the NMSetting, or `NULL` if no setting with that name was previously added to the NMConnection. [transfer none]

### NM_VARIANT_TYPE_SETTING

    #define NM_VARIANT_TYPE_SETTING G_VARIANT_TYPE_VARDICT

GVariantType for a dictionary mapping from property names to values. This is an alias for `G_VARIANT_TYPE_VARDICT`, and is the type of each element of an `NM_VARIANT_TYPE_CONNECTION` dictionary.

### enum NMConnectionSerializationFlags

    typedef enum {
     /*< flags >*/
    	NM_CONNECTION_SERIALIZE_ALL = 0x00000000,
    	NM_CONNECTION_SERIALIZE_NO_SECRETS = 0x00000001,
    	NM_CONNECTION_SERIALIZE_ONLY_SECRETS = 0x00000002,
    } NMConnectionSerializationFlags;

These flags determine which properties are serialized when calling when calling `nm_connection_to_dbus()`.

`NM_CONNECTION_SERIALIZE_ALL` | serialize all properties (including secrets)
`NM_CONNECTION_SERIALIZE_NO_SECRETS` | do not include secrets
`NM_CONNECTION_SERIALIZE_ONLY_SECRETS` | only serialize secrets

### nm_connection_to_dbus ()

    GVariant *          nm_connection_to_dbus               (NMConnection *connection,
                                                             NMConnectionSerializationFlags flags);

Converts the NMConnection into a GVariant of type `NM_VARIANT_TYPE_CONNECTION` describing the connection, suitable for marshalling over D-Bus or otherwise serializing.

`connection` : | the NMConnection
`flags` : | serialization flags, e.g. `NM_CONNECTION_SERIALIZE_ALL`
Returns : | a new floating GVariant describing the connection, its settings, and each setting's properties. [transfer none]

### nm_connection_replace_settings ()

    gboolean            nm_connection_replace_settings      (NMConnection *connection,
                                                             GVariant *new_settings,
                                                             GError **error);

Replaces `connection`'s settings with `new_settings` (which must be syntactically valid, and describe a known type of connection, but does not need to result in a connection that passes `nm_connection_verify()`).

`connection` : | a NMConnection
`new_settings` : | a GVariant of type `NM_VARIANT_TYPE_CONNECTION`, with the new settings
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if connection was updated, `FALSE` if `new_settings` could not be deserialized (in which case `connection` will be unchanged).

### nm_connection_replace_settings_from_connection ()

    void                nm_connection_replace_settings_from_connection
                                                            (NMConnection *connection,
                                                             NMConnection *new_connection);

Deep-copies the settings of `new_connection` and replaces the settings of `connection` with the copied settings.

`connection` : | a NMConnection
`new_connection` : | a NMConnection to replace the settings of `connection` with

### nm_connection_clear_settings ()

    void                nm_connection_clear_settings        (NMConnection *connection);

Deletes all of `connection`'s settings.

`connection` : | a NMConnection

### nm_connection_compare ()

    gboolean            nm_connection_compare               (NMConnection *a,
                                                             NMConnection *b,
                                                             NMSettingCompareFlags flags);

Compares two NMConnection objects for similarity, with comparison behavior modified by a set of flags. See `nm_setting_compare()` for a description of each flag's behavior.

`a` : | a NMConnection
`b` : | a second NMConnection to compare with the first
`flags` : | compare flags, e.g. `NM_SETTING_COMPARE_FLAG_EXACT`
Returns : | `TRUE` if the comparison succeeds, `FALSE` if it does not

### nm_connection_diff ()

    gboolean            nm_connection_diff                  (NMConnection *a,
                                                             NMConnection *b,
                                                             NMSettingCompareFlags flags,
                                                             GHashTable **out_settings);

Compares two NMConnection objects for similarity, with comparison behavior modified by a set of flags. See `nm_setting_compare()` for a description of each flag's behavior. If the connections differ, settings and keys within each setting that differ are added to the returned `out_settings` hash table. No values are returned, only key names.

`a` : | a NMConnection
`b` : | a second NMConnection to compare with the first
`flags` : | compare flags, e.g. `NM_SETTING_COMPARE_FLAG_EXACT`
`out_settings` : | if the connections differ, on return a hash table mapping setting names to second-level GHashTable (utf8 to guint32), which contains the key names that differ mapped to one or more of `NMSettingDiffResult` as a bitfield. [element-type utf8 GLib.HashTable]
Returns : | `TRUE` if the connections contain the same values, `FALSE` if they do not

### nm_connection_verify ()

    gboolean            nm_connection_verify                (NMConnection *connection,
                                                             GError **error);

Validates the connection and all its settings. Each setting's properties have allowed values, and some values are dependent on other values. For example, if a Wi-Fi connection is security enabled, the NMSettingWireless setting object's 'security' property must contain the setting name of the NMSettingWirelessSecurity object, which must also be present in the connection for the connection to be valid. As another example, the NMSettingWired object's 'mac-address' property must be a validly formatted MAC address. The returned GError contains information about which setting and which property failed validation, and how it failed validation.

`connection` : | the NMConnection to verify
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if the connection is valid, `FALSE` if it is not

### nm_connection_normalize ()

    gboolean            nm_connection_normalize             (NMConnection *connection,
                                                             GHashTable *parameters,
                                                             gboolean *modified,
                                                             GError **error);

Does some basic normalization and fixup of well known inconsistencies and deprecated fields. If the connection was modified in any way, the output parameter `modified` is set `TRUE`.

Finally the connection will be verified and `TRUE` returns if the connection is valid. As this function only performs some specific normalization steps it cannot repair all connections. If the connection has errors that cannot be normalized, the connection will not be modified.

`connection` : | the NMConnection to normalize
`parameters` : | a GHashTable with normalization parameters to allow customization of the normalization by providing specific arguments. Unknown arguments will be ignored and the default will be used. The keys must be strings, hashed by `g_str_hash()` and `g_str_equal()` functions. The values are opaque and depend on the parameter name. [allow-none][element-type utf8 gpointer]
`modified` : | outputs whether any settings were modified. [out][allow-none]
`error` : | location to store error, or `NULL`. Contains the reason, why the connection is invalid, if the function returns an error.
Returns : | `TRUE` if the connection is valid, `FALSE` if it is not

### nm_connection_need_secrets ()

    const char *        nm_connection_need_secrets          (NMConnection *connection,
                                                             GPtrArray **hints);

Returns the name of the first setting object in the connection which would need secrets to make a successful connection. The returned hints are only intended as a guide to what secrets may be required, because in some circumstances, there is no way to conclusively determine exactly which secrets are needed.

`connection` : | the NMConnection
`hints` : | the address of a pointer to a GPtrArray, initialized to `NULL`, which on return points to an allocated GPtrArray containing the property names of secrets of the NMSetting which may be required; the caller owns the array and must free the array itself with `g_ptr_array_free()`, but not free its elements. [out][element-type utf8][allow-none][transfer container]
Returns : | the setting name of the NMSetting object which has invalid or missing secrets

### nm_connection_clear_secrets ()

    void                nm_connection_clear_secrets         (NMConnection *connection);

Clears and frees any secrets that may be stored in the connection, to avoid keeping secret data in memory when not needed.

`connection` : | the NMConnection

### nm_connection_clear_secrets_with_flags ()

    void                nm_connection_clear_secrets_with_flags
                                                            (NMConnection *connection,
                                                             NMSettingClearSecretsWithFlagsFn func,
                                                             gpointer user_data);

Clears and frees secrets determined by `func`.

`connection` : | the NMConnection
`func` : | function to be called to determine whether a specific secret should be cleared or not. [scope call]
`user_data` : | caller-supplied data passed to `func`

### nm_connection_update_secrets ()

    gboolean            nm_connection_update_secrets        (NMConnection *connection,
                                                             const char *setting_name,
                                                             GVariant *secrets,
                                                             GError **error);

Update the specified setting's secrets, given a dictionary of secrets intended for that setting (deserialized from D-Bus for example). Will also extract the given setting's secrets hash if given a connection dictionary. If `setting_name` is `NULL`, expects a fully serialized NMConnection as returned by `nm_connection_to_dbus()` and will update all secrets from all settings contained in `secrets`.

`connection` : | the NMConnection
`setting_name` : | the setting object name to which the secrets apply
`secrets` : | a GVariant of secrets, of type `NM_VARIANT_TYPE_CONNECTION` or `NM_VARIANT_TYPE_SETTING`
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if the secrets were successfully updated, `FALSE` if the update failed (tried to update secrets for a setting that doesn't exist, etc)

### nm_connection_set_path ()

    void                nm_connection_set_path              (NMConnection *connection,
                                                             const char *path);

Sets the D-Bus path of the connection. This property is not serialized, and is only for the reference of the caller. Sets the "path" property.

`connection` : | the NMConnection
`path` : | the D-Bus path of the connection as given by the settings service which provides the connection

### nm_connection_get_path ()

    const char *        nm_connection_get_path              (NMConnection *connection);

Returns the connection's D-Bus path.

`connection` : | the NMConnection
Returns : | the D-Bus path of the connection, previously set by a call to `nm_connection_set_path()`.

### nm_connection_get_interface_name ()

    const char *        nm_connection_get_interface_name    (NMConnection *connection);

Returns the interface name as stored in NMSettingConnection:interface_name. If the connection contains no NMSettingConnection, it will return `NULL`.

For hardware devices and software devices created outside of NetworkManager, this name is used to match the device. for software devices created by NetworkManager, this is the name of the created interface.

`connection` : | The NMConnection
Returns : | Name of the kernel interface or `NULL`

### nm_connection_is_type ()

    gboolean            nm_connection_is_type               (NMConnection *connection,
                                                             const char *type);

A convenience function to check if the given `connection` is a particular type (ie wired, Wi-Fi, ppp, etc). Checks the "type" property of the connection and matches that against `type`.

`connection` : | the NMConnection
`type` : | a setting name to check the connection's type against (like `NM_SETTING_WIRELESS_SETTING_NAME` or `NM_SETTING_WIRED_SETTING_NAME`)
Returns : | `TRUE` if the connection is of the given `type`, `FALSE` if not

### nm_connection_for_each_setting_value ()

    void                nm_connection_for_each_setting_value
                                                            (NMConnection *connection,
                                                             NMSettingValueIterFn func,
                                                             gpointer user_data);

Iterates over the properties of each NMSetting object in the NMConnection, calling the supplied user function for each property.

`connection` : | the NMConnection
`func` : | user-supplied function called for each setting's property. [scope call]
`user_data` : | user data passed to `func` at each invocation

### nm_connection_dump ()

    void                nm_connection_dump                  (NMConnection *connection);

Print the connection to stdout. For debugging purposes ONLY, should NOT be used for serialization of the connection or machine-parsed in any way. The output format is not guaranteed to be stable and may change at any time.

`connection` : | the NMConnection

### nm_connection_get_uuid ()

    const char *        nm_connection_get_uuid              (NMConnection *connection);

A shortcut to return the UUID from the connection's NMSettingConnection.

`connection` : | the NMConnection
Returns : | the UUID from the connection's 'connection' setting

### nm_connection_get_id ()

    const char *        nm_connection_get_id                (NMConnection *connection);

A shortcut to return the ID from the connection's NMSettingConnection.

`connection` : | the NMConnection
Returns : | the ID from the connection's 'connection' setting

### nm_connection_get_connection_type ()

    const char *        nm_connection_get_connection_type   (NMConnection *connection);

A shortcut to return the type from the connection's NMSettingConnection.

`connection` : | the NMConnection
Returns : | the type from the connection's 'connection' setting

### nm_connection_is_virtual ()

    gboolean            nm_connection_is_virtual            (NMConnection *connection);

Checks if `connection` refers to a virtual device (and thus can potentially be activated even if the device it refers to doesn't exist).

`connection` : | an NMConnection
Returns : | whether `connection` refers to a virtual device

### nm_connection_get_virtual_device_description ()

    char *              nm_connection_get_virtual_device_description
                                                            (NMConnection *connection);

Returns the name that `nm_device_disambiguate_names()` would return for the virtual device that would be created for `connection`. Eg, "VLAN (eth1.1)".

`connection` : | an NMConnection for a virtual device type
Returns : | the name of `connection`'s device, or `NULL` if `connection` is not a virtual connection type. [transfer full]

### nm_connection_get_setting_802_1x ()

    NMSetting8021x *    nm_connection_get_setting_802_1x    (NMConnection *connection);

A shortcut to return any NMSetting8021x the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSetting8021x if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_bluetooth ()

    NMSettingBluetooth * nm_connection_get_setting_bluetooth
                                                            (NMConnection *connection);

A shortcut to return any NMSettingBluetooth the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingBluetooth if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_bond ()

    NMSettingBond *     nm_connection_get_setting_bond      (NMConnection *connection);

A shortcut to return any NMSettingBond the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingBond if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_team ()

    NMSettingTeam *     nm_connection_get_setting_team      (NMConnection *connection);

A shortcut to return any NMSettingTeam the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingTeam if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_team_port ()

    NMSettingTeamPort * nm_connection_get_setting_team_port (NMConnection *connection);

A shortcut to return any NMSettingTeamPort the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingTeamPort if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_bridge ()

    NMSettingBridge *   nm_connection_get_setting_bridge    (NMConnection *connection);

A shortcut to return any NMSettingBridge the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingBridge if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_bridge_port ()

    NMSettingBridgePort * nm_connection_get_setting_bridge_port
                                                            (NMConnection *connection);

A shortcut to return any NMSettingBridgePort the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingBridgePort if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_cdma ()

    NMSettingCdma *     nm_connection_get_setting_cdma      (NMConnection *connection);

A shortcut to return any NMSettingCdma the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingCdma if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_connection ()

    NMSettingConnection * nm_connection_get_setting_connection
                                                            (NMConnection *connection);

A shortcut to return any NMSettingConnection the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingConnection if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_dcb ()

    NMSettingDcb *      nm_connection_get_setting_dcb       (NMConnection *connection);

A shortcut to return any NMSettingDcb the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingDcb if the connection contains one, otherwise NULL. [transfer none]

### nm_connection_get_setting_generic ()

    NMSettingGeneric *  nm_connection_get_setting_generic   (NMConnection *connection);

A shortcut to return any NMSettingGeneric the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingGeneric if the connection contains one, otherwise NULL. [transfer none]

### nm_connection_get_setting_gsm ()

    NMSettingGsm *      nm_connection_get_setting_gsm       (NMConnection *connection);

A shortcut to return any NMSettingGsm the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingGsm if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_infiniband ()

    NMSettingInfiniband * nm_connection_get_setting_infiniband
                                                            (NMConnection *connection);

A shortcut to return any NMSettingInfiniband the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingInfiniband if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_ip4_config ()

    NMSettingIPConfig * nm_connection_get_setting_ip4_config
                                                            (NMConnection *connection);

A shortcut to return any NMSettingIP4Config the connection might contain.

Note that it returns the value as type NMSettingIPConfig, since the vast majority of IPv4-setting-related methods are on that type, not NMSettingIP4Config.

`connection` : | the NMConnection
Returns : | an NMSettingIP4Config if the connection contains one, otherwise `NULL`. [type NMSettingIP4Config][transfer none]

### nm_connection_get_setting_ip6_config ()

    NMSettingIPConfig * nm_connection_get_setting_ip6_config
                                                            (NMConnection *connection);

A shortcut to return any NMSettingIP6Config the connection might contain.

Note that it returns the value as type NMSettingIPConfig, since the vast majority of IPv6-setting-related methods are on that type, not NMSettingIP6Config.

`connection` : | the NMConnection
Returns : | an NMSettingIP6Config if the connection contains one, otherwise `NULL`. [type NMSettingIP6Config][transfer none]

### nm_connection_get_setting_olpc_mesh ()

    NMSettingOlpcMesh * nm_connection_get_setting_olpc_mesh (NMConnection *connection);

A shortcut to return any NMSettingOlpcMesh the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingOlpcMesh if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_ppp ()

    NMSettingPpp *      nm_connection_get_setting_ppp       (NMConnection *connection);

A shortcut to return any NMSettingPpp the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingPpp if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_pppoe ()

    NMSettingPppoe *    nm_connection_get_setting_pppoe     (NMConnection *connection);

A shortcut to return any NMSettingPppoe the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingPppoe if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_serial ()

    NMSettingSerial *   nm_connection_get_setting_serial    (NMConnection *connection);

A shortcut to return any NMSettingSerial the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingSerial if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_vpn ()

    NMSettingVpn *      nm_connection_get_setting_vpn       (NMConnection *connection);

A shortcut to return any NMSettingVpn the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingVpn if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_wimax ()

    NMSettingWimax *    nm_connection_get_setting_wimax     (NMConnection *connection);

A shortcut to return any NMSettingWimax the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingWimax if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_adsl ()

    NMSettingAdsl *     nm_connection_get_setting_adsl      (NMConnection *connection);

A shortcut to return any NMSettingAdsl the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingAdsl if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_wired ()

    NMSettingWired *    nm_connection_get_setting_wired     (NMConnection *connection);

A shortcut to return any NMSettingWired the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingWired if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_wireless ()

    NMSettingWireless * nm_connection_get_setting_wireless  (NMConnection *connection);

A shortcut to return any NMSettingWireless the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingWireless if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_wireless_security ()

    NMSettingWirelessSecurity * nm_connection_get_setting_wireless_security
                                                            (NMConnection *connection);

A shortcut to return any NMSettingWirelessSecurity the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingWirelessSecurity if the connection contains one, otherwise `NULL`. [transfer none]

### nm_connection_get_setting_vlan ()

    NMSettingVlan *     nm_connection_get_setting_vlan      (NMConnection *connection);

A shortcut to return any NMSettingVlan the connection might contain.

`connection` : | the NMConnection
Returns : | an NMSettingVlan if the connection contains one, otherwise `NULL`. [transfer none]