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adding flags to IP addresses

real xiaoyang requested to merge realxiaoyang/NetworkManager:main into main

Adding "flags" to IP addresses is passed through DBUS, making it easier for upper level applications to distinguish between temporary addresses,local link addresses, and ipv6 addresses

Only the changes in the src/core/NetworkManagerUtils. c file are necessary. The reason for the changes may be multiple IP addresses, and DBUS callers need to distinguish between these IPs (temporary IP, local IP, etc.). After adding "n_ifa_flags", the caller can distinguish different types of IPs through "n_ifa_flags". For example, using ifconfig can see multiple IPv6 addresses, but the NetworkManager caller cannot distinguish between these IP addresses. The following is the execution result of 'ifconfig'：

	wlx200db01ffe4c: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
		    inet 192.168.8.204  netmask 255.255.255.0  broadcast 192.168.8.255
		    inet6 fd5c:78f8:7354:6f00:c390:656f:edc4:72bf  prefixlen 64  scopeid 0x0<global>
		    inet6 2408:8411:9068:b5a:fc84:cada:c3e6:48ff  prefixlen 64  scopeid 0x0<global>
		    inet6 2408:8411:9068:b5a:5c78:f873:546f:2  prefixlen 128  scopeid 0x0<global>
		    inet6 fe80::45e9:5fd6:2ca7:1d38  prefixlen 64  scopeid 0x20<link>
		    inet6 fd5c:78f8:7354:6f00:fc84:cada:c3e6:48ff  prefixlen 64  scopeid 0x0<global>
		    inet6 2408:8411:9068:b5a:4bb0:82f3:8795:e09c  prefixlen 64  scopeid 0x0<global>
		    ether 20:0d:b0:1f:fe:4c  txqueuelen 1000  (以太网)
		    RX packets 110  bytes 25381 (25.3 KB)
		    RX errors 0  dropped 62  overruns 0  frame 0
		    TX packets 205  bytes 40495 (40.4 KB)
		    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
Edited by Thomas Haller

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