{"@attributes":{"version":"2.0"},"channel":{"title":"\u6674\u732b\u7684\u535a\u5ba2","link":"https:\/\/baka.studio\/","description":"Recent content on \u6674\u732b\u7684\u535a\u5ba2","generator":"Hugo -- gohugo.io","language":"zh-cn","lastBuildDate":"Sat, 28 Mar 2026 00:00:00 +0000","item":[{"title":"\u5728 UCG-Fiber \u4e0a\u4f18\u96c5\u5730\u4f7f\u7528 SoftBank 10G","link":"https:\/\/baka.studio\/p\/%E5%9C%A8-ucg-fiber-%E4%B8%8A%E4%BC%98%E9%9B%85%E5%9C%B0%E4%BD%BF%E7%94%A8-softbank-10g\/","pubDate":"Sat, 28 Mar 2026 00:00:00 +0000","guid":"https:\/\/baka.studio\/p\/%E5%9C%A8-ucg-fiber-%E4%B8%8A%E4%BC%98%E9%9B%85%E5%9C%B0%E4%BD%BF%E7%94%A8-softbank-10g\/","description":"\n
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SoftBank 10G \u5149\u7ea4 + UCG-Fiber + IPIP6 \u96a7\u9053 + \u4e00\u4e2a 15 \u884c\u7684 C shim = \u5b8c\u7f8e\u7684 WAN \u72b6\u6001<\/p>\n

\u672c\u6587\u7ae0\u548c\u5176\u80cc\u540e\u7684\u5de5\u4f5c\u7531\u6211\u548c Claude Code \u5171\u540c\u5b8c\u6210<\/em><\/p>\n\n <\/blockquote>\n

\u80cc\u666f\uff1a10Gbps \u5149\u7ea4\u7684\u70e6\u607c\n<\/h2>

\u524d\u5e74\u642c\u5bb6\u540e\u6362\u4e0a\u4e86 SoftBank \u5149\u30fb10\u30ae\u30ac<\/a>\u3002\u901f\u5ea6\u662f\u771f\u7684\u5feb\uff0c\u4f46\u6709\u4e2a\u95ee\u9898\uff1aSoftBank \u5f3a\u5236\u8981\u6c42\u4f7f\u7528\u4ed6\u4eec\u7684\u8def\u7531\u5668(XG-1000NE)<\/strong>\u3002\u8fd9\u73a9\u610f\u8d1f\u8d23 IPoE \u8ba4\u8bc1\u548c SoftBank \u81ea\u6709\u7684 IPv4 over IPv6 \u96a7\u9053\uff0c\u6ca1\u6709\u5b83\u7684\u8bdd\uff0c\u5c31\u53ea\u80fd\u901a\u8fc7 DHCPv6 \u62ff\u5230 IPv6 \u5730\u5740\uff0c\u62ff\u4e0d\u5230 IPv4\u3002<\/p>\n

\u6700\u8fd1\u6361\u4e86\u4e00\u53f0UCG Fiber\uff0c\u5b83\u6709\u4e00\u4e2a\u5b8c\u6574\u7684 Debian \u7cfb\u7edf\uff0c\u4e8e\u662f\u6211\u5c31\u5f00\u59cb\u7814\u7a76\u80fd\u4e0d\u80fd\u7528\u5b83\u6765\u4ee3\u66ff SoftBank \u7684\u8def\u7531\u5668\u3002<\/p>\n

\"UCG-Fiber<\/p>\n

\u95ee\u9898\u662f\uff1aUCG-Fiber \u7684 UniFiOS \u539f\u751f\u4e0d\u652f\u6301 SoftBank \u7684 IPv4 over IPv6 \u65b9\u6848\u3002\u5b83\u652f\u6301 v6plus (MAP-E) \u548c OCN \u30d0\u30fc\u30c1\u30e3\u30eb\u30b3\u30cd\u30af\u30c8\uff0c\u4f46 SoftBank \u7528\u7684\u662f\u81ea\u5df1\u7684 IPIP6 \u96a7\u9053\u534f\u8bae\u2014\u2014\u5b8c\u5168\u4e0d\u5728\u652f\u6301\u5217\u8868\u4e0a\u3002<\/p>\n

\u53d1\u73b0 luci-app-fleth\n<\/h2>

\u5728 GitHub \u4e0a\u641c\u7d22\u7684\u65f6\u5019\u53d1\u73b0\u4e86 luci-app-fleth<\/a>\uff0c\u4e00\u4e2a\u4e13\u4e3a\u65e5\u672c ISP \u8bbe\u8ba1\u7684 OpenWrt \u63d2\u4ef6\u3002\u5b83\u652f\u6301 DS-Lite\u3001MAP-E \u548c**\u72ec\u7acb IP\uff08IPIP6\uff09**\u4e09\u79cd\u6a21\u5f0f\uff0c\u5176\u4e2d\u72ec\u7acb IP \u6a21\u5f0f\u6b63\u662f\u6211\u9700\u8981\u7684\uff1a\u901a\u8fc7 IPIP6 \u96a7\u9053\u83b7\u53d6\u4e00\u4e2a\u4e13\u5c5e\u7684\u516c\u7f51 IPv4 \u5730\u5740\uff0c\u5e76\u4e14\u4f5c\u8005\u4e5f\u8bf4\u5728 SoftBank 10G \u4e1c\u65e5\u672c\u6d4b\u8bd5\u901a\u8fc7\u4e86\u3002<\/p>\n

\u4f46\u8fd9\u4e2a\u9879\u76ee\u662f\u7ed9 OpenWrt \u7684\u3002UCG-Fiber \u76f4\u63a5\u5237\u6210 OpenWrt \u5e76\u4e0d\u65b9\u4fbf\u3002\u4e0d\u8fc7\u770b\u4e86\u5b83\u7684\u811a\u672c ipip6h.sh<\/code>\uff0c\u5176\u5b9e\u5c31\u662f\u51e0\u884c\u547d\u4ee4\uff1a<\/p>\n

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1\n<\/span>2\n<\/span>3\n<\/span>4\n<\/span><\/code><\/pre><\/td>\n
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ip tunnel add tun4 mode ipip6 local<\/span> <\u672c\u5730IPv6> remote <\u5bf9\u7aefIPv6> dev eth4\n<\/span><\/span>ip link set<\/span> tun4 mtu 1460<\/span> up\n<\/span><\/span>ip addr add <\u516c\u7f51IPv4>\/32 dev tun4\n<\/span><\/span>ip route add default dev tun4\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u8fd9\u4e9b\u547d\u4ee4\u5728 UCG-Fiber \u4e0a\u5b8c\u5168\u53ef\u4ee5\u8dd1\u3002\u4e8e\u662f\u6211\u624b\u52a8\u642d\u5efa\u4e86\u96a7\u9053\uff0c\u52a0\u4e0a iptables \u505a NAT \u548c\u7aef\u53e3\u8f6c\u53d1\uff0c\u8bd5\u4e86\u4e00\u4e0b\u771f\u7684\u80fd\u62ff\u5230v4\u5730\u5740\u3002\u4e0d\u8fc7\u53ea\u8981\u5728\u8def\u7531\u5668\u7684UI\u4e0a\u6539\u4e00\u4e0b\u8bbe\u7f6e\u5c31\u4f1a\u628a\u96a7\u9053\u7834\u574f\u6389\uff0c\u4e8e\u662f\u5199\u4e86\u4e2a watchdog \u811a\u672c\u6bcf 15 \u79d2\u68c0\u67e5\u4e00\u6b21\u96a7\u9053\u72b6\u6001\u2014\u2014\u4e92\u8054\u7f51\u8bbf\u95ee\u5b8c\u7f8e\u6062\u590d\u4e86<\/strong>\u3002<\/p>\n
\u95ee\u9898\u6d6e\u73b0\uff1aWAN \u72b6\u6001 DOWN\n<\/h2>
\u867d\u7136\u96a7\u9053\u5de5\u4f5c\uff0c\u4f46 UniFi \u7684\u7ba1\u7406\u754c\u9762\u91cc WAN \u72b6\u6001\u4e00\u76f4\u663e\u793a\u4e3a DOWN<\/strong>\u3002<\/p>\n
\u867d\u7136\u4e5f\u80fd\u51d1\u6d3b\u7528\uff0c\u4f46\u6211\u5bb6\u91cc\u8fd8\u6709 Starlink<\/strong> \u7f51\u7edc\uff0c\u6211\u60f3\u628a\u5b83\u4f5c\u4e3a\u5907\u7528 WAN\uff0c\u5229\u7528 UCG-Fiber \u7684\u53cc WAN \u6545\u969c\u5207\u6362\u529f\u80fd\u3002\u4f46 UniFi \u7684 failover \u903b\u8f91\u4f9d\u8d56 WAN \u5065\u5eb7\u72b6\u6001\u2014\u2014\u5982\u679c\u4e3b WAN \u6c38\u8fdc\u663e\u793a DOWN\uff0c\u6545\u969c\u5207\u6362\u5c31\u6ca1\u7528\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u4f1a DOWN\uff1f\n<\/h3>
IPv4\u662ftun\u62ff\u5230\u7684\uff0c\u800cWAN\u63a5\u53e3\u81ea\u5df1\u4e0d\u6301\u6709\u4efb\u4f55IPv4<\/p>\n
\u8bd5\u8fc7\u5728 UniFi \u91cc\u628a WAN \u8bbe\u7f6e\u4e3a DS-Lite \u6a21\u5f0f\uff0c\u4e5f\u53ea\u80fd\u62ff\u5230\u4e00\u4e2a\u65e0\u7528\u5730\u5740192.0.0.2\u3002\u4e0d\u8fc7\u7cfb\u7edf\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a ip6tnl1<\/code> \u7684\u96a7\u9053\u63a5\u53e3\u3002\u8fd9\u4e2a\u96a7\u9053\u7684\u8fdc\u7aef\u662f ::<\/code>\u3002UniFi \u901a\u8fc7\u8fd9\u4e2a\u63a5\u53e3\u505a\u5065\u5eb7\u68c0\u6d4b\uff0c\u7ed3\u679c\u5f53\u7136\u662f\u4e00\u76f4\u5931\u8d25\u3002<\/p>\n
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1\n<\/span>2\n<\/span>3\n<\/span><\/code><\/pre><\/td>\n
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ip6tnl1: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1452\n<\/span><\/span> link\/tunnel6 2400:...:1 peer ::\n<\/span><\/span> inet 192.0.0.2\/29 scope global ip6tnl1 \u2190 DS-Lite B4 \u5730\u5740\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u800c\u6211\u4eec\u771f\u6b63\u5de5\u4f5c\u7684\u96a7\u9053 tun4<\/code>\uff0cUniFi \u5b8c\u5168\u4e0d\u77e5\u9053\u5b83\u7684\u5b58\u5728\u3002<\/p>\n
\u7b2c\u4e00\u6b21\u5c1d\u8bd5\uff1a\u52ab\u6301\u6e90\u5730\u5740\u8def\u7531\uff08\u5931\u8d25\uff09\n<\/h2>
\u6211\u7684\u7b2c\u4e00\u4e2a\u60f3\u6cd5\u662f\uff1a\u65e2\u7136 UniFi \u901a\u8fc7 ip6tnl1<\/code> \u505a\u5065\u5eb7\u68c0\u6d4b\uff08ping 8.8.8.8\uff09\uff0c\u90a3\u6211\u8ba9\u8fd9\u4e9b ping \u5305\u8d70 tun4<\/code> \u51fa\u53bb\u4e0d\u5c31\u884c\u4e86\uff1f<\/p>\n
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1\n<\/span>2\n<\/span>3\n<\/span>4\n<\/span><\/code><\/pre><\/td>\n
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# \u8ba9\u6765\u81ea DS-Lite B4 \u5730\u5740 (192.0.0.2) \u7684\u6d41\u91cf\u8d70\u4e3b\u8def\u7531\u8868<\/span>\n<\/span><\/span>ip rule add from 192.0.0.2 lookup main prio 100<\/span>\n<\/span><\/span># \u628a\u6e90\u5730\u5740 SNAT \u6210\u96a7\u9053\u7684\u516c\u7f51 IP<\/span>\n<\/span><\/span>iptables -t nat -A POSTROUTING -s 192.0.0.2 -o tun4 -j SNAT --to-source 126.206.229.60\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u6d4b\u8bd5\uff1a<\/p>\n
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1\n<\/span>2\n<\/span>3\n<\/span>4\n<\/span>5\n<\/span><\/code><\/pre><\/td>\n
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$ ping -I 192.0.0.2 8.8.8.8 # \u7ed1\u5b9a\u6e90\u5730\u5740<\/span>\n<\/span><\/span>PING 8.8.8.8: 64<\/span> bytes, time<\/span>=<\/span>5.8ms \u2190 \u6210\u529f\uff01\n<\/span><\/span>\n<\/span><\/span>$ ping -I ip6tnl1 8.8.8.8 # \u7ed1\u5b9a\u63a5\u53e3<\/span>\n<\/span><\/span>100% packet loss \u2190 \u5931\u8d25\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u7ed1\u5b9a\u6e90\u5730\u5740\u6709\u6548\uff0c\u4f46\u7ed1\u5b9a\u63a5\u53e3\u65e0\u6548\u3002<\/strong> SO_BINDTODEVICE<\/code> \u76f4\u63a5\u5728\u94fe\u8def\u5c42\u628a\u5305\u4ece\u6307\u5b9a\u63a5\u53e3\u53d1\u51fa\uff0c\u5b8c\u5168\u7ed5\u8fc7\u8def\u7531\u8868\u548c ip rule\u3002\u95ee\u9898\u662f\uff1aubios-udapi-server<\/code> \u5230\u5e95\u7528\u7684\u662f\u54ea\u79cd\u65b9\u5f0f\uff1f<\/p>\n
\u7b54\u6848\u5f88\u5feb\u5c31\u660e\u786e\u4e86\u2014\u2014\u7ba1\u7406\u9875\u9762\u7684 WAN \u72b6\u6001\u4f9d\u7136\u662f DOWN\u3002\u5b83\u7528\u7684\u662f SO_BINDTODEVICE<\/code>\u3002<\/strong><\/p>\n
graph TB\n subgraph method_a[\"\u65b9\u6cd5 A: bind() + \u6e90\u5730\u5740 (192.0.0.2)\"]\n A1[\"udapi-serverbind(192.0.0.2)\"] --> A2[\"ip rulefrom 192.0.0.2lookup main\"]\n A2 --> A3[\"iptables SNAT192.0.0.2 \u2192 \u516c\u7f51 IP\"]\n A3 --> A4[\"tun4 \u53d1\u51fa\"]\n A4 --> A5((\"8.8.8.8\u2705 \u53ef\u8fbe\"))\n end\n\n subgraph method_b[\"\u65b9\u6cd5 B: SO_BINDTODEVICE('ip6tnl1')\"]\n B1[\"udapi-serversetsockopt(SO_BINDTODEVICE,'ip6tnl1')\"] --> B2[\"\u5185\u6838: \u6570\u636e\u5305\u76f4\u63a5\u4ece ip6tnl1 \u53d1\u51fa\"]\n B2 -.-> B3[\"ip rule \u274c(\u88ab\u7ed5\u8fc7)\"]\n B2 -.-> B4[\"iptables \u274c(\u88ab\u7ed5\u8fc7)\"]\n B2 --> B5[\"ip6tnl1 \u53d1\u51fa(remote = ::)\"]\n B5 --> B6((\"8.8.8.8\u274c \u4e0d\u53ef\u8fbe\"))\n end<\/pre>
\u5176\u4ed6\u5931\u8d25\u7684\u5c1d\u8bd5\n<\/h2>
\u5728\u627e\u5230\u6700\u7ec8\u65b9\u6848\u4e4b\u524d\uff0c\u6211\u8fd8\u8bd5\u4e86\u51e0\u6761\u8def\uff1a<\/p>\n
\u865a\u62df\u63a5\u53e3<\/strong>\uff1a\u80fd\u4e0d\u80fd\u521b\u5efa\u4e00\u4e2a dummy\/macvlan \u63a5\u53e3\u9a97\u8fc7 UniFi UI\uff1f\u4e0d\u884c\u3002UniFi \u7684\u7aef\u53e3\u5217\u8868\u662f\u56fa\u4ef6\u786c\u7f16\u7801\u7684\uff0c\u53ea\u663e\u793a eth0<\/code>-eth6<\/code>\uff0c\u865a\u62df\u63a5\u53e3\u6c38\u8fdc\u4e0d\u4f1a\u51fa\u73b0\u5728 WAN \u9009\u62e9\u5668\u91cc\u3002<\/p>\n
\u4fee\u6539\u8def\u7531\u8868 201<\/strong>\uff1aip6tnl1<\/code> \u6709\u81ea\u5df1\u7684\u8def\u7531\u8868\uff08201.ip6tnl1<\/code>\uff09\uff0c\u628a\u5b83\u7684\u9ed8\u8ba4\u8def\u7531\u6307\u5411 tun4<\/code>\uff1f<\/p>\n
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1\n<\/span><\/code><\/pre><\/td>\n
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ip route replace default dev tun4 table 201.ip6tnl1\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u7136\u800c SO_BINDTODEVICE<\/code> \u8fde\u8def\u7531\u8868\u90fd\u4e0d\u770b\uff0c\u5305\u76f4\u63a5\u4ece ip6tnl1<\/code> \u53d1\u51fa\u3002<\/p>\n
\u4fee\u6539\u4e8c\u8fdb\u5236\u6587\u4ef6<\/strong>\uff1a\u76f4\u63a5 patch ubnt_monitor<\/code>\uff1f\u6211\u7528 strings<\/code> \u5206\u6790\u4e86\u5b83\uff0c\u53d1\u73b0\u5927\u91cf Ping<\/code> \u76f8\u5173\u5b57\u7b26\u4e32\u2026\u2026\u7ed3\u679c\u90a3\u90fd\u662f Go HTTP\/2 \u7684 Ping frame<\/strong>\u3002\u8fd9\u4e2a\u8fdb\u7a0b\u5b9e\u9645\u4e0a\u662f analytic-report-go<\/code>\uff0c\u4e00\u4e2a\u6570\u636e\u5206\u6790\u4e0a\u62a5\u5de5\u5177\uff0c\u6839\u672c\u4e0d\u662f\u5065\u5eb7\u68c0\u6d4b\u5668\u3002<\/p>\n
\u771f\u6b63\u7684\u5065\u5eb7\u68c0\u6d4b\u5668\u662f ubios-udapi-server<\/code><\/strong>\uff0c\u8fd9\u662f\u4e00\u4e2a 30MB \u7684 C \u7a0b\u5e8f\u3002\u800c\u5b83\u7684\u63a5\u53e3\u540d\u4e0d\u662f\u786c\u7f16\u7801\u7684\uff0c\u662f\u8fd0\u884c\u65f6\u4ece UDAPI \u72b6\u6001\u6587\u4ef6\u52a8\u6001\u8bfb\u53d6\u7684\uff0c\u6240\u4ee5\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u66ff\u6362\u4e5f\u884c\u4e0d\u901a\u3002<\/p>\n
\u8f6c\u673a\uff1a\u5b83\u662f\u52a8\u6001\u94fe\u63a5\u7684\n<\/h2>
\u5f53\u6211\u5feb\u8981\u653e\u5f03\u7684\u65f6\u5019\uff0c\u8dd1\u4e86\u4e00\u4e0b ldd<\/code>\uff1a<\/p>\n
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1\n<\/span>2\n<\/span>3\n<\/span>4\n<\/span>5\n<\/span><\/code><\/pre><\/td>\n
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$ ldd \/usr\/bin\/ubios-udapi-server\n<\/span><\/span> libudapi.so =<\/span>> \/usr\/lib\/aarch64-linux-gnu\/libudapi.so\n<\/span><\/span> libsw.so =<\/span>> \/usr\/lib\/libsw.so\n<\/span><\/span> libc.so.6 =<\/span>> \/lib\/aarch64-linux-gnu\/libc.so.6\n<\/span><\/span> ...\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u5b83\u662f\u52a8\u6001\u94fe\u63a5\u7684\uff01<\/strong> \u8fd9\u610f\u5473\u7740 LD_PRELOAD<\/code> \u53ef\u4ee5\u7528\u3002<\/p>\n
sequenceDiagram\n participant U as ubios-udapi-server\n participant H as hook_bindtodevice.so(LD_PRELOAD)\n participant L as libc (\u771f\u6b63\u7684 setsockopt)\n participant K as \u5185\u6838\n\n Note over U,K: \u5065\u5eb7\u68c0\u6d4b\u5f00\u59cb: WAN ping 8.8.8.8\n\n U->>H: setsockopt(fd, SOL_SOCKET,SO_BINDTODEVICE, \"ip6tnl1\")\n \n Note over H: memcmp(optval, \"ip6tnl1\") == 0\u2192 \u66ff\u6362\u4e3a \"tun4\"!\n\n H->>L: setsockopt(fd, SOL_SOCKET,SO_BINDTODEVICE, \"tun4\")\n\n L->>K: \u5c06 socket \u7ed1\u5b9a\u5230 tun4\n\n K-->>U: ping 8.8.8.8 \u2192 \u7ecf tun4 \u53d1\u51fa\u2192 \u6536\u5230\u56de\u590d \u2705\n\n Note over U: WAN \u72b6\u6001: UP \u2705\n\n rect rgb(199,199,199)\n Note over U,K: \u666e\u901a setsockopt \u8c03\u7528 (\u975e ip6tnl1)\n U->>H: setsockopt(fd, level, optname, other_val)\n Note over H: \u4e0d\u662f ip6tnl1 \u2192 \u539f\u6837\u900f\u4f20\n H->>L: setsockopt(fd, level, optname, other_val)\n L->>K: (\u65e0\u4fee\u6539)\n end<\/pre>
15 \u884c\u4ee3\u7801\u7684\u89e3\u51b3\u65b9\u6848\n<\/h2>
\u65e2\u7136 ubios-udapi-server<\/code> \u901a\u8fc7 setsockopt(SO_BINDTODEVICE, "ip6tnl1")<\/code> \u628a\u5065\u5eb7\u68c0\u6d4b\u7ed1\u5b9a\u5230\u90a3\u4e2a\u574f\u6389\u7684\u96a7\u9053\u4e0a\uff0c\u6211\u53ea\u9700\u8981\u5728\u5b83\u8c03\u7528 setsockopt<\/code> \u7684\u65f6\u5019\u628a "ip6tnl1"<\/code> \u5077\u5077\u6362\u6210 "tun4"<\/code>\uff1a<\/p>\n
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 1\n<\/span> 2\n<\/span> 3\n<\/span> 4\n<\/span> 5\n<\/span> 6\n<\/span> 7\n<\/span> 8\n<\/span> 9\n<\/span>10\n<\/span>11\n<\/span>12\n<\/span>13\n<\/span>14\n<\/span>15\n<\/span>16\n<\/span>17\n<\/span>18\n<\/span>19\n<\/span><\/code><\/pre><\/td>\n
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#define _GNU_SOURCE\n<\/span><\/span><\/span>#include<\/span> <dlfcn.h><\/span>\n<\/span><\/span><\/span>#include<\/span> <errno.h><\/span>\n<\/span><\/span><\/span>#include<\/span> <string.h><\/span>\n<\/span><\/span><\/span>#include<\/span> <sys\/socket.h><\/span>\n<\/span><\/span><\/span>\n<\/span><\/span>typedef<\/span> int<\/span> (<\/span>*<\/span>real_setsockopt_t<\/span>)(<\/span>int<\/span>,<\/span> int<\/span>,<\/span> int<\/span>,<\/span> const<\/span> void<\/span> *<\/span>,<\/span> socklen_t<\/span>);<\/span>\n<\/span><\/span>\n<\/span><\/span>int<\/span> setsockopt<\/span>(<\/span>int<\/span> fd<\/span>,<\/span> int<\/span> level<\/span>,<\/span> int<\/span> optname<\/span>,<\/span>\n<\/span><\/span> const<\/span> void<\/span> *<\/span>optval<\/span>,<\/span> socklen_t<\/span> optlen<\/span>)<\/span> {<\/span>\n<\/span><\/span> real_setsockopt_t<\/span> real<\/span> =<\/span> dlsym<\/span>(<\/span>RTLD_NEXT<\/span>,<\/span> "setsockopt"<\/span>);<\/span>\n<\/span><\/span> if<\/span> (<\/span>!<\/span>real<\/span>)<\/span> {<\/span> errno<\/span> =<\/span> ENOSYS<\/span>;<\/span> return<\/span> -<\/span>1<\/span>;<\/span> }<\/span>\n<\/span><\/span>\n<\/span><\/span> if<\/span> (<\/span>level<\/span> ==<\/span> SOL_SOCKET<\/span> &&<\/span> optname<\/span> ==<\/span> SO_BINDTODEVICE<\/span> &&<\/span>\n<\/span><\/span> optval<\/span> &&<\/span> optlen<\/span> >=<\/span> 7<\/span> &&<\/span> memcmp<\/span>(<\/span>optval<\/span>,<\/span> "ip6tnl1"<\/span>,<\/span> 7<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span>\n<\/span><\/span> return<\/span> real<\/span>(<\/span>fd<\/span>,<\/span> level<\/span>,<\/span> optname<\/span>,<\/span> "tun4"<\/span>,<\/span> 5<\/span>);<\/span>\n<\/span><\/span>\n<\/span><\/span> return<\/span> real<\/span>(<\/span>fd<\/span>,<\/span> level<\/span>,<\/span> optname<\/span>,<\/span> optval<\/span>,<\/span> optlen<\/span>);<\/span>\n<\/span><\/span>}<\/span>\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
\u903b\u8f91\u975e\u5e38\u7b80\u5355\uff1a<\/p>\n
    \n
  1. \u7528 dlsym(RTLD_NEXT, ...)<\/code> \u83b7\u53d6\u771f\u6b63\u7684 setsockopt<\/code><\/li>\n
  2. \u5982\u679c\u8c03\u7528\u8005\u60f3\u7ed1\u5b9a\u5230 ip6tnl1<\/code>\uff0c\u5c31\u66ff\u6362\u6210 tun4<\/code><\/li>\n
  3. \u5176\u4ed6\u6240\u6709\u8c03\u7528\u539f\u6837\u900f\u4f20<\/li>\n<\/ol>\n
    \u4ea4\u53c9\u7f16\u8bd1\n<\/h3>
    UCG-Fiber \u662f aarch64 \u67b6\u6784\uff0c\u7cfb\u7edf\u6ca1\u6709\u81ea\u5e26\u7f16\u8bd1\u5668\u3002\u4e8e\u662f\u6211\u7528 zig<\/code> \u5728 macOS \u4e0a\u4ea4\u53c9\u7f16\u8bd1\uff1a<\/p>\n
    \n
    \n
    1\n<\/span><\/code><\/pre><\/td>\n
    		\n
    zig cc -target aarch64-linux-gnu -shared -fPIC -o hook_bindtodevice.so hook_bindtodevice.c\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
    \u90e8\u7f72\n<\/h3>
    \u628a\u7f16\u8bd1\u597d\u7684 .so<\/code> \u4e0a\u4f20\u5230\u8def\u7531\u5668\uff0c\u901a\u8fc7 systemd drop-in \u6ce8\u5165\u5230 udapi-server<\/code>\uff1a<\/p>\n
    \n
    \n
    1\n<\/span>2\n<\/span>3\n<\/span><\/code><\/pre><\/td>\n
    		\n
    # \/etc\/systemd\/system\/udapi-server.service.d\/wan-hook.conf<\/span>\n<\/span><\/span>[Service]<\/span>\n<\/span><\/span>Environment<\/span>=<\/span>LD_PRELOAD=\/data\/hook_bindtodevice.so<\/span>\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
    \n
    \n
    1\n<\/span><\/code><\/pre><\/td>\n
    		\n
    systemctl daemon-reload &&<\/span> systemctl restart udapi-server\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
    \u9a8c\u8bc1\n<\/h3>
    \n
    \n
    1\n<\/span>2\n<\/span>3\n<\/span>4\n<\/span>5\n<\/span>6\n<\/span><\/code><\/pre><\/td>\n
    		\n
    # \u786e\u8ba4 hook \u5df2\u52a0\u8f7d\u5230\u8fdb\u7a0b\u4e2d<\/span>\n<\/span><\/span>$ cat \/proc\/$(<\/span>pgrep -of ubios-udapi-server)<\/span>\/environ |<\/span> tr '\\0'<\/span> '\\n'<\/span> |<\/span> grep PRELOAD\n<\/span><\/span>LD_PRELOAD<\/span>=<\/span>\/data\/hook_bindtodevice.so\n<\/span><\/span>\n<\/span><\/span>$ cat \/proc\/$(<\/span>pgrep -of ubios-udapi-server)<\/span>\/maps |<\/span> grep hook\n<\/span><\/span>7f86c7c000-7f86d0f000 ... \/data\/hook_bindtodevice.so\n<\/span><\/span><\/code><\/pre><\/td><\/tr><\/table>\n<\/div>\n<\/div>
    \u7136\u540e\u770b\u4e86\u4e00\u773c UniFi Dashboard\u2014\u2014WAN \u72b6\u6001\uff1aUP<\/strong> \u2713<\/p>\n
    \"UniFi<\/p>\n
    \u800c\u4e14\u8fd9\u4e2a\u65b9\u6848\u7684\u4f18\u96c5\u4e4b\u5904\u5728\u4e8e\uff1a\u5f53 tun4<\/code> \u771f\u7684\u6302\u6389\u65f6\uff0c\u901a\u8fc7 tun4<\/code> \u7684\u5065\u5eb7\u68c0\u6d4b\u4e5f\u4f1a\u5931\u8d25\uff0cWAN \u4f1a\u6b63\u786e\u663e\u793a\u4e3a DOWN\uff0cStarlink failover \u4e5f\u5c31\u80fd\u6b63\u5e38\u89e6\u53d1\u4e86\u3002<\/p>\n
    \u5b8c\u6574\u67b6\u6784\n<\/h2>
    \u6700\u7ec8\u7684\u7cfb\u7edf\u67b6\u6784\uff1a<\/p>\n
    graph TB\n subgraph Router[\"UCG-Fiber\"]\n BR0[\"br0 (LAN)192.168.1.x\"]\n ETH4[\"eth4 (WAN)IPoE IPv6\"]\n TUN4[\"tun4 (IPIP6 \u96a7\u9053)\u516c\u7f51 IPv4\"]\n IP6TNL[\"ip6tnl1 \u274cDS-Lite \u7a7a\u96a7\u9053remote = ::\"]\n HOOK[\"LD_PRELOAD hookip6tnl1 \u2192 tun4\"]\n UDAPI[\"ubios-udapi-server\u5065\u5eb7\u68c0\u6d4b \u2192 tun4 \u2192 8.8.8.8WAN \u72b6\u6001: UP \u2705\"]\n end\n\n REMOTE((\"\u96a7\u9053\u5bf9\u7aef\u516c\u7f51 IPv4\"))\n STARLINK[\"StarlinkWAN2 \u5907\u7528\"]\n LAN[\"\u5185\u7f51\u8bbe\u5907\"]\n\n LAN --> BR0\n BR0 --> ETH4\n ETH4 -- \"IPIP6 \u5c01\u88c5\" --> TUN4\n TUN4 -- \"IPv4-in-IPv6\" --> REMOTE\n ETH4 -.- IP6TNL\n\n IP6TNL -. \"\u672c\u5e94\u68c0\u6d4b\u8fd9\u4e2a\" .-> UDAPI\n HOOK -- \"\u62e6\u622a\u5e76\u66ff\u6362\u63a5\u53e3\u540d\" --> UDAPI\n TUN4 -. \"\u5b9e\u9645\u68c0\u6d4b\u8d70\u8fd9\u4e2a\" .-> UDAPI\n\n STARLINK -. \"\u6545\u969c\u65f6\u81ea\u52a8\u5207\u6362\" .-> ETH4<\/pre>
    \u5173\u952e\u7ec4\u4ef6\uff1a<\/strong><\/p>\n