如果 NetworkManager 在创建时不可用，则它不会自动连接到无线

Question

如果 NetworkManager 在创建时不可用，则它不会自动连接到无线

cim*_*cim 5 network-manager networking 16.04

作为 Ubuntu 16.04 服务器自动构建过程的一部分，我nmcli用来创建网络配置文件，包括无线。这是在没有窗口管理器 FWIW 的无头系统上。

我注意到，当我创建一个配置文件并激活它时，如果接入点 (AP) 在激活时不存在，它将永远不会自动连接，无论它随后是否可用。

我试图缩小问题的原因，并认为这可能与 dbus 注册有关。

个人资料创建：

sudo nmcli con add con-name "aNetwork" ifname wlp2s0 type wifi ssid "aNetwork"
sudo nmcli con modify "aNetwork" wifi-sec.key-mgmt wpa-psk
sudo nmcli con modify "aNetwork" wifi-sec.psk aPassword
sudo nmcli con up id "aNetwork"

Run Code Online (Sandbox Code Playgroud)

从系统日志中，它似乎正确添加并将其设置为扫描：

ug 12 08:55:06 bacer-104 NetworkManager[585]: <info>  [1565600106.4111] Config: added 'ssid' value 'aNetwork'
Aug 12 08:55:06 bacer-104 NetworkManager[585]: <info>  [1565600106.4111] Config: added 'scan_ssid' value '1'
Aug 12 08:55:06 bacer-104 NetworkManager[585]: <info>  [1565600106.4112] Config: added 'key_mgmt' value 'WPA-PSK'
Aug 12 08:55:06 bacer-104 NetworkManager[585]: <info>  [1565600106.4112] Config: added 'psk' value '<omitted>'
Aug 12 08:55:06 bacer-104 NetworkManager[585]: <info>  [1565600106.4128] sup-iface[0x1b0ff90,wlp2s0]: config: set interface ap_scan to 1

Run Code Online (Sandbox Code Playgroud)

但是，在我使 AP 可见后，它永远不会扫描/连接，但是当在创建时存在 ESSID 时激活连接时，我得到以下条目：

NetworkManager[489]: <debug> [1565287017.8330] device[0x1fb95f0] (wlp2s0): add_pending_action (3): 'scan'

Run Code Online (Sandbox Code Playgroud)

但是当连接被激活 * 并且 ESSID 在创建时不存在时，我得到了这个：

NetworkManager[489]: <debug> [1565287064.3891] device[0x1fb95f0] (wlp2s0): add_pending_action (1): 'scan'
NetworkManager[489]: <debug> [1565287065.4580] device[0x1fb95f0] (wlp2s0): remove_pending_action (0): 'scan'

Run Code Online (Sandbox Code Playgroud)

内容为/etc/NetworkManager/system-connection/aNetwork：

[connection]
id=aNetwork
uuid=6f24046b-b265-46d5-b89f-59ec802ce0af
type=wifi
interface-name=wlp2s0
permissions=
secondaries=

[wifi]
mac-address-blacklist=
mac-address-randomization=0
seen-bssids=
ssid=aNetwork

[wifi-security]
group=
key-mgmt=wpa-psk
pairwise=
proto=
psk=aPassword

[ipv4]
dns-search=
method=auto

[ipv6]
addr-gen-mode=stable-privacy
dns-search=
method=auto

Run Code Online (Sandbox Code Playgroud)

我已经diff编辑了在存在和不存在 ESSID 并且没有区别的情况下创建的配置文件之间的内容。

查看nmcli con show aNetwork两者之间的输出显示了很大的差异：

断开连接时的输出，在创建/激活时没有ESSID：

connection.id:                          aNetwork
connection.uuid:                        9dfacadb-f52a-453b-b6f1-2fbae6426d79
connection.interface-name:              wlp2s0
connection.type:                        802-11-wireless
connection.autoconnect:                 yes
connection.autoconnect-priority:        0
connection.timestamp:                   0
connection.read-only:                   no
connection.permissions:
connection.zone:                        --
connection.master:                      --
connection.slave-type:                  --
connection.autoconnect-slaves:          -1 (default)
connection.secondaries:
connection.gateway-ping-timeout:        0
connection.metered:                     unknown
connection.lldp:                        -1 (default)
802-11-wireless.ssid:                   aNetwork
802-11-wireless.mode:                   --
802-11-wireless.band:                   --
802-11-wireless.channel:                0
802-11-wireless.bssid:                  --
802-11-wireless.rate:                   0
802-11-wireless.tx-power:               0
802-11-wireless.mac-address:            --
802-11-wireless.cloned-mac-address:     --
802-11-wireless.mac-address-blacklist:
802-11-wireless.mac-address-randomization:default
802-11-wireless.mtu:                    auto
802-11-wireless.seen-bssids:
802-11-wireless.hidden:                 no
802-11-wireless.powersave:              default (0)
802-11-wireless-security.key-mgmt:      wpa-psk
802-11-wireless-security.wep-tx-keyidx: 0
802-11-wireless-security.auth-alg:      --
802-11-wireless-security.proto:
802-11-wireless-security.pairwise:
802-11-wireless-security.group:
802-11-wireless-security.leap-username: --
802-11-wireless-security.wep-key0:      <hidden>
802-11-wireless-security.wep-key1:      <hidden>
802-11-wireless-security.wep-key2:      <hidden>
802-11-wireless-security.wep-key3:      <hidden>
802-11-wireless-security.wep-key-flags: 0 (none)
802-11-wireless-security.wep-key-type:  0 (unknown)
802-11-wireless-security.psk:           <hidden>
802-11-wireless-security.psk-flags:     0 (none)
802-11-wireless-security.leap-password: <hidden>
802-11-wireless-security.leap-password-flags:0 (none)
ipv4.method:                            auto
ipv4.dns:
ipv4.dns-search:
ipv4.dns-options:                       (default)
ipv4.dns-priority:                      0
ipv4.addresses:
ipv4.gateway:                           --
ipv4.routes:
ipv4.route-metric:                      -1
ipv4.ignore-auto-routes:                no
ipv4.ignore-auto-dns:                   no
ipv4.dhcp-client-id:                    --
ipv4.dhcp-timeout:                      0
ipv4.dhcp-send-hostname:                yes
ipv4.dhcp-hostname:                     --
ipv4.dhcp-fqdn:                         --
ipv4.never-default:                     no
ipv4.may-fail:                          yes
ipv4.dad-timeout:                       -1 (default)
ipv6.method:                            auto
ipv6.dns:
ipv6.dns-search:
ipv6.dns-options:                       (default)
ipv6.dns-priority:                      0
ipv6.addresses:
ipv6.gateway:                           --
ipv6.routes:
ipv6.route-metric:                      -1
ipv6.ignore-auto-routes:                no
ipv6.ignore-auto-dns:                   no
ipv6.never-default:                     no
ipv6.may-fail:                          yes
ipv6.ip6-privacy:                       -1 (unknown)
ipv6.addr-gen-mode:                     stable-privacy
ipv6.dhcp-send-hostname:                yes
ipv6.dhcp-hostname:                     --

Run Code Online (Sandbox Code Playgroud)

断开连接且创建/激活时存在 ESSID时的输出为：

connection.id:                          aNetwork
connection.uuid:                        10d2d80a-4f64-4466-9e4e-6190e4628d45
connection.interface-name:              wlp2s0
connection.type:                        802-11-wireless
connection.autoconnect:                 yes
connection.autoconnect-priority:        0
connection.timestamp:                   1565600053
connection.read-only:                   no
connection.permissions:
connection.zone:                        --
connection.master:                      --
connection.slave-type:                  --
connection.autoconnect-slaves:          -1 (default)
connection.secondaries:
connection.gateway-ping-timeout:        0
connection.metered:                     unknown
connection.lldp:                        -1 (default)
802-11-wireless.ssid:                   aNetwork
802-11-wireless.mode:                   --
802-11-wireless.band:                   --
802-11-wireless.channel:                0
802-11-wireless.bssid:                  --
802-11-wireless.rate:                   0
802-11-wireless.tx-power:               0
802-11-wireless.mac-address:            --
802-11-wireless.cloned-mac-address:     --
802-11-wireless.mac-address-blacklist:
802-11-wireless.mac-address-randomization:default
802-11-wireless.mtu:                    auto
802-11-wireless.seen-bssids:            9A:9B:CB:54:C4:5A
802-11-wireless.hidden:                 no
802-11-wireless.powersave:              default (0)
802-11-wireless-security.key-mgmt:      wpa-psk
802-11-wireless-security.wep-tx-keyidx: 0
802-11-wireless-security.auth-alg:      --
802-11-wireless-security.proto:
802-11-wireless-security.pairwise:
802-11-wireless-security.group:
802-11-wireless-security.leap-username: --
802-11-wireless-security.wep-key0:      <hidden>
802-11-wireless-security.wep-key1:      <hidden>
802-11-wireless-security.wep-key2:      <hidden>
802-11-wireless-security.wep-key3:      <hidden>
802-11-wireless-security.wep-key-flags: 0 (none)
802-11-wireless-security.wep-key-type:  0 (unknown)
802-11-wireless-security.psk:           <hidden>
802-11-wireless-security.psk-flags:     0 (none)
802-11-wireless-security.leap-password: <hidden>
802-11-wireless-security.leap-password-flags:0 (none)
ipv4.method:                            auto
ipv4.dns:
ipv4.dns-search:
ipv4.dns-options:                       (default)
ipv4.dns-priority:                      0
ipv4.addresses:
ipv4.gateway:                           --
ipv4.routes:
ipv4.route-metric:                      -1
ipv4.ignore-auto-routes:                no
ipv4.ignore-auto-dns:                   no
ipv4.dhcp-client-id:                    --
ipv4.dhcp-timeout:                      0
ipv4.dhcp-send-hostname:                yes
ipv4.dhcp-hostname:                     --
ipv4.dhcp-fqdn:                         --
ipv4.never-default:                     no
ipv4.may-fail:                          yes
ipv4.dad-timeout:                       -1 (default)
ipv6.method:                            auto
ipv6.dns:
ipv6.dns-search:
ipv6.dns-options:                       (default)
ipv6.dns-priority:                       0
ipv6.addresses:
ipv6.gateway:                            --
ipv6.routes:
ipv6.route-metric:                       -1
ipv6.ignore-auto-routes:                 no
ipv6.ignore-auto-dns:                    no
ipv6.never-default:                      no
ipv6.may-fail:                           yes
ipv6.ip6-privacy:                        -1 (unknown)
ipv6.addr-gen-mode:                      stable-privacy
ipv6.dhcp-send-hostname:                 yes
ipv6.dhcp-hostname:                      --
GENERAL.NAME:                            aNetwork
GENERAL.UUID:                            10d2d80a-4f64-4466-9e4e-6190e4628d45
GENERAL.DEVICES:                         wlp2s0
GENERAL.STATE:                           activated
GENERAL.DEFAULT:                         no
GENERAL.DEFAULT6:                        no
GENERAL.VPN:                             no
GENERAL.ZONE:                            --
GENERAL.DBUS-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/15
GENERAL.CON-PATH:                        /org/freedesktop/NetworkManager/Settings/11
GENERAL.SPEC-OBJECT:                     /org/freedesktop/NetworkManager/AccessPoint/12
GENERAL.MASTER-PATH:                     --
IP4.ADDRESS[1]:                          192.168.179.29/24
IP4.GATEWAY:                             192.168.179.1
IP4.DNS[1]:                              192.168.179.1
DHCP4.OPTION[1]:                         dhcp_rebinding_time = 18900
DHCP4.OPTION[2]:                         requested_domain_search = 1
DHCP4.OPTION[3]:                         requested_host_name = 1
DHCP4.OPTION[4]:                         requested_time_offset = 1
DHCP4.OPTION[5]:                         requested_domain_name = 1
DHCP4.OPTION[6]:                         requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[7]:                         requested_broadcast_address = 1
DHCP4.OPTION[8]:                         requested_wpad = 1
DHCP4.OPTION[9]:                         requested_netbios_scope = 1
DHCP4.OPTION[10]:                        next_server = 192.168.179.1
DHCP4.OPTION[11]:                        expiry = 1565621653
DHCP4.OPTION[12]:                        requested_interface_mtu = 1
DHCP4.OPTION[13]:                        requested_subnet_mask = 1
DHCP4.OPTION[14]:                        routers = 192.168.179.1
DHCP4.OPTION[15]:                        dhcp_message_type = 5
DHCP4.OPTION[16]:                        ip_address = 192.168.179.29
DHCP4.OPTION[17]:                        broadcast_address = 192.168.179.255
DHCP4.OPTION[18]:                        requested_static_routes = 1
DHCP4.OPTION[19]:                        dhcp_renewal_time = 10800
DHCP4.OPTION[20]:                        requested_domain_name_servers = 1
DHCP4.OPTION[21]:                        requested_ms_classless_static_routes = 1
DHCP4.OPTION[22]:                        domain_name_servers = 192.168.179.1
DHCP4.OPTION[23]:                        subnet_mask = 255.255.255.0
DHCP4.OPTION[24]:                        dhcp_lease_time = 21600
DHCP4.OPTION[25]:                        requested_ntp_servers = 1
DHCP4.OPTION[26]:                        requested_netbios_name_servers = 1
DHCP4.OPTION[27]:                        ntp_servers = 192.168.179.1
DHCP4.OPTION[28]:                        network_number = 192.168.179.0
DHCP4.OPTION[29]:                        requested_routers = 1
DHCP4.OPTION[30]:                        dhcp_server_identifier = 192.168.179.1
IP6.ADDRESS[1]:                          fd00::1:79ff:2a88:6b89:f5a3/64
IP6.ADDRESS[2]:                          fd00::1:53f4:ea8b:a2c6:88bc/64
IP6.ADDRESS[3]:                          fe80::42af:506a:16:1256/64
IP6.GATEWAY:
IP6.ROUTE[1]:                            dst = fd00:0:0:1::/64, nh = fe80::9a9b:cbff:fe54:c457, mt = 600
IP6.DNS[1]:                              fd00::1:9a9b:cbff:fe54:c457
DHCP6.OPTION[1]:                         requested_dhcp6_domain_search = 1
DHCP6.OPTION[2]:                         dhcp6_name_servers = fd00::1:9a9b:cbff:fe54:c457
DHCP6.OPTION[3]:                         dhcp6_server_id = 0:3:0:1:98:9b:cb:54:c4:57
DHCP6.OPTION[4]:                         requested_dhcp6_client_id = 1
DHCP6.OPTION[5]:                         requested_dhcp6_name_servers = 1
DHCP6.OPTION[6]:                         dhcp6_client_id = 0:4:cd:4c:df:d9:4d:62:c6:97:e1:a2:ed:b7:68:6a:be:9c

Run Code Online (Sandbox Code Playgroud)

注意所有GENERAL.条目，包括GENERAL.STATE Activated和条目DBUS-PATH，CON-PATH所以我相信这是导致连接无法自动连接的原因，但我真的不知道从哪里开始。

我需要：

能够在网络范围之外创建配置文件
当它在范围内时让它自动连接。
使用网络管理器

我如何从这里开始？

Answer 1

小智 4

我遇到了同样的问题，在尝试调试一段时间后，我进入 Network Manager IRC 频道并直接询问他们。对于 Wi-Fi 网络，这是故意的，限制来自此检查：

https://github.com/NetworkManager/NetworkManager/blob/master/src/devices/wifi/nm-device-wifi.c#L999

引用支票上方的评论：

    /* Don't autoconnect to networks that have been tried at least once
     * but haven't been successful, since these are often accidental choices
     * from the menu and the user may not know the password.
     */

Run Code Online (Sandbox Code Playgroud)

其推理值得怀疑，但事实就是如此。如果您查看/var/lib/NetworkManager/timestamps，您会发现对于它从未连接到的网络，时间戳值为0。据我所知，无法从 D-Bus/nmcli 更改此值，因此您必须编辑该文件并最终重新启动 NetworkManager（不知道该文件是在更改时运行还是定期运行）。

就我而言，我们正在为嵌入式发行版构建网络管理器，并有机会在此过程中对其进行修补，因此我注释掉了该检查，它会自动连接到以前从未连接过的网络。

归档时间：	6 年，8 月前
查看次数：	1885 次
最近记录：	6 年，7 月前