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

## Functions

GQuark | nm_connection_error_quark ()
NMConnection * | nm_connection_new ()
NMConnection * | nm_connection_new_from_hash ()
NMConnection * | nm_connection_duplicate ()
NMSetting * | nm_connection_create_setting ()
void | nm_connection_add_setting ()
void | nm_connection_remove_setting ()
NMSetting * | nm_connection_get_setting ()
NMSetting * | nm_connection_get_setting_by_name ()
gboolean | nm_connection_replace_settings ()
gboolean | nm_connection_replace_settings_from_connection ()
gboolean | nm_connection_compare ()
gboolean | nm_connection_diff ()
gboolean | nm_connection_verify ()
gboolean | nm_connection_normalize ()
const char * | nm_connection_need_secrets ()
void | nm_connection_clear_secrets ()
void | nm_connection_clear_secrets_with_flags ()
gboolean | nm_connection_update_secrets ()
void | nm_connection_set_path ()
const char * | nm_connection_get_path ()
const char * | nm_connection_get_virtual_iface_name ()
const char * | nm_connection_get_interface_name ()
gboolean | nm_connection_is_type ()
void | nm_connection_for_each_setting_value ()
GHashTable * | nm_connection_to_hash ()
void | nm_connection_dump ()
GType | nm_connection_lookup_setting_type ()
GType | nm_connection_lookup_setting_type_by_quark ()
const char * | nm_connection_get_uuid ()
const char * | nm_connection_get_id ()
const char * | nm_connection_get_connection_type ()
char * | nm_connection_get_virtual_device_description ()
NMSetting8021x * | nm_connection_get_setting_802_1x ()
NMSettingBluetooth * | nm_connection_get_setting_bluetooth ()
NMSettingBond * | nm_connection_get_setting_bond ()
NMSettingTeam * | nm_connection_get_setting_team ()
NMSettingTeamPort * | nm_connection_get_setting_team_port ()
NMSettingBridge * | nm_connection_get_setting_bridge ()
NMSettingBridgePort * | nm_connection_get_setting_bridge_port ()
NMSettingCdma * | nm_connection_get_setting_cdma ()
NMSettingConnection * | nm_connection_get_setting_connection ()
NMSettingDcb * | nm_connection_get_setting_dcb ()
NMSettingGeneric * | nm_connection_get_setting_generic ()
NMSettingGsm * | nm_connection_get_setting_gsm ()
NMSettingInfiniband * | nm_connection_get_setting_infiniband ()
NMSettingIP4Config * | nm_connection_get_setting_ip4_config ()
NMSettingIP6Config * | nm_connection_get_setting_ip6_config ()
NMSettingOlpcMesh * | nm_connection_get_setting_olpc_mesh ()
NMSettingPPP * | nm_connection_get_setting_ppp ()
NMSettingPPPOE * | nm_connection_get_setting_pppoe ()
NMSettingSerial * | nm_connection_get_setting_serial ()
NMSettingVPN * | nm_connection_get_setting_vpn ()
NMSettingWimax * | nm_connection_get_setting_wimax ()
NMSettingAdsl * | nm_connection_get_setting_adsl ()
NMSettingWired * | nm_connection_get_setting_wired ()
NMSettingWireless * | nm_connection_get_setting_wireless ()
NMSettingWirelessSecurity * | nm_connection_get_setting_wireless_security ()
NMSettingVlan * | nm_connection_get_setting_vlan ()

## Properties

gchar * | path | Read / Write / Construct

## Signals

void | changed | Run First
void | secrets-cleared | Run First
void | secrets-updated | Run First

## Types and Values

#define | NM_CONNECTION_SECRETS_UPDATED
#define | NM_CONNECTION_SECRETS_CLEARED
#define | NM_CONNECTION_CHANGED
#define | NM_CONNECTION_PATH
enum | NMConnectionError
#define | NM_CONNECTION_NORMALIZE_PARAM_IP6_CONFIG_METHOD
#define | NM_CONNECTION_ERROR
| NMConnection

## Object Hierarchy

        GEnum
        ╰── NMConnectionError
        GObject
        ╰── NMConnection

## Includes

    #include <nm-connection.h>

## 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).

## Functions

### nm_connection_error_quark ()

    GQuark
    nm_connection_error_quark (void);

Registers an error quark for NMConnection if necessary.

#### Returns

the error quark used for NMConnection errors.

### nm_connection_new ()

    NMConnection *
    nm_connection_new (void);

Creates a new NMConnection object with no NMSetting objects.

#### Returns

the new empty NMConnection object

### nm_connection_new_from_hash ()

    NMConnection *
    nm_connection_new_from_hash (GHashTable *hash,
                                 GError **error);

Creates a new NMConnection from a hash table describing the connection. See `nm_connection_to_hash()` for a description of the expected hash table.

#### Parameters

hash | the GHashTable describing the connection. | [element-type utf8 GLib.HashTable]
error | on unsuccessful return, an error |

#### Returns

the new NMConnection object, populated with settings created from the values in the hash table, or `NULL` if the connection failed to validate

### nm_connection_duplicate ()

    NMConnection *
    nm_connection_duplicate (NMConnection *connection);

Duplicates a NMConnection.

#### Parameters

connection | the NMConnection to duplicate |

#### Returns

a new NMConnection containing the same settings and properties as the source NMConnection.

[transfer full]

### nm_connection_create_setting ()

    NMSetting *
    nm_connection_create_setting (const char *name);

Create a new NMSetting object of the desired type, given a setting name.

#### Parameters

name | a setting name |

#### Returns

the new setting object, or `NULL` if the setting name was unknown.

[transfer full]

### 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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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_connection_replace_settings ()

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

#### Parameters

connection | a NMConnection |
new_settings | a GHashTable of settings. | [element-type utf8 GLib.HashTable]
error | location to store error, or `NULL` |

#### Returns

`TRUE` if the settings were valid and added to the connection, `FALSE` if they were not

### nm_connection_replace_settings_from_connection ()

    gboolean
    nm_connection_replace_settings_from_connection
                                   (NMConnection *connection,
                                    NMConnection *new_connection,
                                    GError **error);

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

#### Parameters

connection | a NMConnection |
new_connection | a NMConnection to replace the settings of `connection` with |
error | location to store error, or `NULL` |

#### Returns

`TRUE` if the settings were valid and added to the connection, `FALSE` if they were not

Since: 0.9.10

### 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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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

Since: 1.0

### 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.

#### Parameters

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.

#### Parameters

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` .

#### Parameters

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,
                                  GHashTable *secrets,
                                  GError **error);

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

#### Parameters

connection | the NMConnection |
setting_name | the setting object name to which the secrets apply |
secrets | a GHashTable mapping string:GValue of setting property names and secrets of the given `setting_name` . | [element-type utf8 GObject.Value]
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.

#### Parameters

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.

#### Parameters

connection | the NMConnection |

#### Returns

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

### nm_connection_get_virtual_iface_name ()

    const char *
    nm_connection_get_virtual_iface_name (NMConnection *connection);

Returns the name of the virtual kernel interface which the connection needs to use if specified in the settings. This function abstracts all connection types which require this functionality. For all other connection types, this function will return `NULL`.

#### Parameters

connection | The NMConnection |

#### Returns

Name of the kernel interface or `NULL`

### 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.

#### Parameters

connection | The NMConnection |

#### Returns

Name of the kernel interface or `NULL`

Since: 1.0

### 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` .

#### Parameters

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.

#### Parameters

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_to_hash ()

    GHashTable *
    nm_connection_to_hash (NMConnection *connection,
                           NMSettingHashFlags flags);

Converts the NMConnection into a GHashTable describing the connection, suitable for marshalling over D-Bus or serializing. The hash table mapping is string:GHashTable with each element in the returned hash representing a NMSetting object. The keys are setting object names, and the values are GHashTables mapping string:GValue, each of which represents the properties of the NMSetting object.

#### Parameters

connection | the NMConnection |
flags | hash flags, e.g. `NM_SETTING_HASH_FLAG_ALL` |

#### Returns

a new GHashTable describing the connection, its settings, and each setting's properties. The caller owns the hash table and must unref the hash table with `g_hash_table_unref()` when it is no longer needed.

[transfer full][element-type utf8 GLib.HashTable]

### 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.

#### Parameters

connection | the NMConnection |

### nm_connection_lookup_setting_type ()

    GType
    nm_connection_lookup_setting_type (const char *name);

Returns the GType of the setting's class for a given setting name.

#### Parameters

name | a setting name |

#### Returns

the GType of the setting's class

### nm_connection_lookup_setting_type_by_quark ()

    GType
    nm_connection_lookup_setting_type_by_quark
                                   (GQuark error_quark);

Returns the GType of the setting's class for a given setting error quark. Useful for figuring out which setting a returned error is for.

#### Parameters

error_quark | a setting error quark |

#### Returns

the GType of the setting's class

### nm_connection_get_uuid ()

    const char *
    nm_connection_get_uuid (NMConnection *connection);

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

#### Parameters

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.

#### Parameters

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.

#### Parameters

connection | the NMConnection |

#### Returns

the type from the connection's 'connection' setting

Since: 0.9.10

### 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)".

#### Parameters

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]

Since: 0.9.10

### 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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingTeam if the connection contains one, otherwise `NULL`.

[transfer none]

Since: 0.9.10

### 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.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingTeamPort if the connection contains one, otherwise `NULL`.

[transfer none]

Since: 0.9.10

### nm_connection_get_setting_bridge ()

    NMSettingBridge *
    nm_connection_get_setting_bridge (NMConnection *connection);

A shortcut to return any NMSettingBridge the connection might contain.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingDcb if the connection contains one, otherwise NULL.

[transfer none]

Since: 0.9.10

### nm_connection_get_setting_generic ()

    NMSettingGeneric *
    nm_connection_get_setting_generic (NMConnection *connection);

A shortcut to return any NMSettingGeneric the connection might contain.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingGeneric if the connection contains one, otherwise NULL.

[transfer none]

Since: 0.9.10

### nm_connection_get_setting_gsm ()

    NMSettingGsm *
    nm_connection_get_setting_gsm (NMConnection *connection);

A shortcut to return any NMSettingGsm the connection might contain.

#### Parameters

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.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingInfiniband if the connection contains one, otherwise `NULL`.

[transfer none]

### nm_connection_get_setting_ip4_config ()

    NMSettingIP4Config *
    nm_connection_get_setting_ip4_config (NMConnection *connection);

A shortcut to return any NMSettingIP4Config the connection might contain.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingIP4Config if the connection contains one, otherwise `NULL`.

[transfer none]

### nm_connection_get_setting_ip6_config ()

    NMSettingIP6Config *
    nm_connection_get_setting_ip6_config (NMConnection *connection);

A shortcut to return any NMSettingIP6Config the connection might contain.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingIP6Config if the connection contains one, otherwise `NULL`.

[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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

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.

#### Parameters

connection | the NMConnection |

#### Returns

an NMSettingVlan if the connection contains one, otherwise `NULL`.

[transfer none]

## Types and Values

### 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_PATH

    #define NM_CONNECTION_PATH "path"

### enum NMConnectionError

Describes errors that may result from operations involving a NMConnection.

#### Members

NM_CONNECTION_ERROR_UNKNOWN | unknown or unclassified error |
NM_CONNECTION_ERROR_CONNECTION_SETTING_NOT_FOUND | the NMConnection object did not contain the required NMSettingConnection object, which must be present for all connections |
NM_CONNECTION_ERROR_CONNECTION_TYPE_INVALID | the 'type' property of the 'connection' setting did not point to a valid connection base type; ie it was not a hardware-related setting like NMSettingWired or NMSettingWireless. |
NM_CONNECTION_ERROR_SETTING_NOT_FOUND | the NMConnection object did not contain the specified NMSetting object |
NM_CONNECTION_ERROR_INVALID_SETTING | the NMConnection object contains a conflicting setting object |

### NM_CONNECTION_NORMALIZE_PARAM_IP6_CONFIG_METHOD

    #define NM_CONNECTION_NORMALIZE_PARAM_IP6_CONFIG_METHOD "ip6-config-method"

### NM_CONNECTION_ERROR

    #define NM_CONNECTION_ERROR nm_connection_error_quark ()

### NMConnection

    typedef struct _NMConnection NMConnection;

The NMConnection struct contains only private data. It should only be accessed through the functions described below.

## Property Details

### The `“path”` property

      “path”                     gchar *

The connection's D-Bus path, used only by the calling process as a record of the D-Bus path of the connection as provided by a settings service.

Flags: Read / Write / Construct

Default value: NULL

## Signal Details

### The `“changed”` signal

    void
    user_function (NMConnection *connection,
                   gpointer      user_data)

The ::changed signal is emitted when any property of any property (including secrets) of any setting of the connection is modified, or when settings are added or removed.

#### Parameters

connection | the object on which the signal is emitted |
user_data | user data set when the signal handler was connected. |

Flags: Run First

Since: 0.9.10

### The `“secrets-cleared”` signal

    void
    user_function (NMConnection *connection,
                   gpointer      user_data)

The ::secrets-cleared signal is emitted when the secrets of a connection are cleared.

#### Parameters

connection | the object on which the signal is emitted |
user_data | user data set when the signal handler was connected. |

Flags: Run First

### The `“secrets-updated”` signal

    void
    user_function (NMConnection *connection,
                   gchar        *setting_name,
                   gpointer      user_data)

The ::secrets-updated signal is emitted when the secrets of a setting have been changed.

#### Parameters

connection | the object on which the signal is emitted |
setting_name | the setting name of the NMSetting for which secrets were updated |
user_data | user data set when the signal handler was connected. |

Flags: Run First