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社区首页 >问答首页 >在macOS上固定时间后传入UDP组播流停止

问在macOS上固定时间后传入UDP组播流停止
EN

Unix & Linux用户
提问于 2020-10-28 13:38:37
回答 1查看 586关注 0票数 2

我的ISP提供IPTV功能，流示例：udp://@239.255.2.97:5500。我想在macOS上看IPTV，所以我用了VLC。

最初，IPTV根本不起作用。一开始我以为它被锁在ISP的mediabox上了。然后我在各种设备上进行了测试，它在任何地方都能工作:运行Windows的同一台Mac电脑、苹果电视、Redmi手机和各种iOS设备。在googling之后，我找到了解决方案：在终端中执行sudo sysctl net.inet.igmp.sendra=0使VLC播放流。(不需要强制默认版本为2)

但是后来我注意到流在04:20±1s之后就停止了，只有重新启动流才能让它再次播放。这在上面提到的任何其他设备/平台上都不会发生。我有两个Macs mbp运行Mojave (SIP off)和小型运行Catalina (SIP on) -两者都会发生，有线/无线连接没有什么区别，以及使用的软件(尝试VLC和Kodi)。

我完全不知道如何解决这个问题，在互联网上找不到任何相关信息，我真的很感激你的帮助。

我会给你需要的任何信息，最好是张贴必要的命令，以获得所需的信息。

默认的IGMP设置在两个Mac上是相同的：

代码语言：javascript
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❯ sysctl net.inet.igmp
net.inet.igmp.recvifkludge: 1
net.inet.igmp.sendra: 1
net.inet.igmp.sendlocal: 1
net.inet.igmp.v1enable: 1
net.inet.igmp.v2enable: 1
net.inet.igmp.legacysupp: 0
net.inet.igmp.default_version: 3
net.inet.igmp.gsrdelay: 10
net.inet.igmp.debug: 0

这是我的Mac的ifconfig -a，如果有帮助的话：

无线MBP：

代码语言：javascript
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lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
    options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
    inet 127.0.0.1 netmask 0xff000000 
    inet6 ::1 prefixlen 128 
    inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
    nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
EHC250: flags=0<> mtu 0
EHC253: flags=0<> mtu 0
en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=b<RXCSUM,TXCSUM,VLAN_HWTAGGING>
    ether 58:b0:35:f4:e6:de 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (none)
    status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    ether 58:b0:35:7a:2f:13 
    inet6 fe80::108d:a3b7:c229:4e24%en1 prefixlen 64 secured scopeid 0x7 
    inet 192.168.1.69 netmask 0xffffff00 broadcast 192.168.1.255
    inet6 2a00:1370:8131:b399:803:904:7e51:a50b prefixlen 64 autoconf secured 
    inet6 2a00:1370:8131:b399:7944:3d6c:3303:58b prefixlen 64 autoconf temporary 
    inet6 2a00:1370:8131:b399:f628:52b3:28ae:8d54 prefixlen 64 dynamic 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
    lladdr d8:30:62:ff:fe:f0:e9:aa 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect <full-duplex>
    status: inactive
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
    ether 0a:b0:35:7a:2f:13 
    media: autoselect
    status: inactive
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
    inet6 fe80::83e0:2ce2:8c0d:e1a7%utun0 prefixlen 64 scopeid 0xa 
    nd6 options=201<PERFORMNUD,DAD>
bridge100: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=3<RXCSUM,TXCSUM>
    ether 5a:b0:35:4f:b0:64 
    inet 192.168.2.1 netmask 0xffffff00 broadcast 192.168.2.255
    inet6 fe80::58b0:35ff:fe4f:b064%bridge100 prefixlen 64 scopeid 0xb 
    Configuration:
        id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
        maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
        root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
        ipfilter disabled flags 0x2
    member: en0 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 6 priority 0 path cost 0
    nd6 options=201<PERFORMNUD,DAD>
    media: <unknown type>
    status: inactive

迷你有线：

代码语言：javascript
运行
复制
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
    options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
    inet 127.0.0.1 netmask 0xff000000 
    inet6 ::1 prefixlen 128 
    inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
    nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=50b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV,CHANNEL_IO>
    ether 14:9d:99:7c:63:cc 
    inet6 fe80::ee:83f2:5357:c607%en0 prefixlen 64 secured scopeid 0x4 
    inet6 2a00:1370:8131:b399:4b6:9a5b:7712:e480 prefixlen 64 autoconf secured 
    inet6 2a00:1370:8131:b399:b837:ed92:a5dc:5859 prefixlen 64 autoconf temporary 
    inet6 2a00:1370:8131:b399:2846:2489:ad80:fc9b prefixlen 64 dynamic 
    inet 192.168.1.65 netmask 0xffffff00 broadcast 192.168.1.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (1000baseT <full-duplex,flow-control>)
    status: active
en6: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    ether ac:de:48:00:11:22 
    inet6 fe80::aede:48ff:fe00:1122%en6 prefixlen 64 scopeid 0x5 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (100baseTX <full-duplex>)
    status: active
ap1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether 3e:22:fb:a8:1b:69 
    media: autoselect
    status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether 3c:22:fb:a8:1b:69 
    inet6 fe80::805:ed7:b180:94c0%en1 prefixlen 64 secured scopeid 0x7 
    inet 169.254.31.79 netmask 0xffff0000 broadcast 169.254.255.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (<unknown type>)
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
    options=400<CHANNEL_IO>
    ether 0e:22:fb:a8:1b:69 
    media: autoselect
    status: inactive
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
    options=400<CHANNEL_IO>
    ether a6:cb:ac:da:de:6b 
    inet6 fe80::a4cb:acff:feda:de6b%awdl0 prefixlen 64 scopeid 0x9 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether a6:cb:ac:da:de:6b 
    inet6 fe80::a4cb:acff:feda:de6b%llw0 prefixlen 64 scopeid 0xa 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=460<TSO4,TSO6,CHANNEL_IO>
    ether 82:fa:d0:e2:c0:01 
    media: autoselect <full-duplex>
    status: inactive
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=460<TSO4,TSO6,CHANNEL_IO>
    ether 82:fa:d0:e2:c0:00 
    media: autoselect <full-duplex>
    status: inactive
en4: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=460<TSO4,TSO6,CHANNEL_IO>
    ether 82:fa:d0:e2:c0:05 
    media: autoselect <full-duplex>
    status: inactive
en5: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=460<TSO4,TSO6,CHANNEL_IO>
    ether 82:fa:d0:e2:c0:04 
    media: autoselect <full-duplex>
    status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=63<RXCSUM,TXCSUM,TSO4,TSO6>
    ether 82:fa:d0:e2:c0:01 
    Configuration:
        id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
        maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
        root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
        ipfilter disabled flags 0x0
    member: en2 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 11 priority 0 path cost 0
    member: en3 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 12 priority 0 path cost 0
    member: en4 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 13 priority 0 path cost 0
    member: en5 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 14 priority 0 path cost 0
    nd6 options=201<PERFORMNUD,DAD>
    media: <unknown type>
    status: inactive
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
    inet6 fe80::93a6:b158:9d1a:86ee%utun0 prefixlen 64 scopeid 0x10 
    nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
    inet6 fe80::fef3:61fc:6994:82c4%utun1 prefixlen 64 scopeid 0x11 
    nd6 options=201<PERFORMNUD,DAD>
en8: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether da:1c:79:6f:03:9d 
    inet6 fe80::18db:f66f:c81d:54d0%en8 prefixlen 64 secured scopeid 0x14 
    inet 169.254.172.225 netmask 0xffff0000 broadcast 169.254.255.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (100baseTX <full-duplex>)
    status: active
udp
multicast
macos
EN

回答 1

Unix & Linux用户

回答已采纳

发布于 2020-10-31 10:19:39

解决方案。向/etc/pf.conf添加以下规则：

代码语言：javascript
运行
复制
anchor "multicast" {
  pass proto igmp allow-opts
  pass quick from any to { 224.0.0.0/4 ff00::/8 } allow-opts
}

(还可以将规则放在单独的文件中，并将它们附加到锚点，参见PF手册)

不再需要sudo sysctl net.inet.igmp.sendra=0攻击。

问题的来源。私有互联网接入应用程序支持PF防火墙，并加载自己的规则，这显然禁用IGMP /多播。即使PIA应用程序没有运行，也会发生这种情况。我已经联系了PIA的支持部门希望他们能修好它。

调查细节。

  • tcpdump透露，Mac不响应来自路由器的IGMP请求。
  • 魔术04:20时间是125 *2+ 10，其中125是查询间隔，10是在我的路由器上的IGMP代理中设置的查询响应超时。
  • 我发现macOS有PF防火墙，默认情况下是禁用的，但这两台机器都启用了它。禁用它通过sudo pfctl -d固定IPTV和IGMP响应。
  • 禁用/etc/pf.conf (苹果默认规则)中的规则没有任何效果，然后我通过sudo pfctl -sr：anchor "com.privateinternetaccess.vpn/*" all发现了PIA的规则。
  • 从Murus (用于PF的UI)和voilà抓取IGMP +组播规则(在解决方案中列出)！
票数 1
EN
页面原文内容由Unix & Linux提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://unix.stackexchange.com/questions/616847

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