base-files: network.sh: fix a number of IPv6 logic flaws
[lede.git] / package / base-files / files / lib / functions / network.sh
1 # 1: destination variable
2 # 2: interface
3 # 3: path
4 # 4: separator
5 # 5: limit
6 __network_ifstatus() {
7         local __tmp
8
9         [ -z "$__NETWORK_CACHE" ] && \
10                 export __NETWORK_CACHE="$(ubus call network.interface dump)"
11
12         __tmp="$(jsonfilter ${4:+-F "$4"} ${5:+-l "$5"} -s "$__NETWORK_CACHE" -e "$1=@.interface${2:+[@.interface='$2']}$3")"
13
14         [ -z "$__tmp" ] && \
15                 unset "$1" && \
16                 return 1
17
18         eval "$__tmp"
19 }
20
21 # determine first IPv4 address of given logical interface
22 # 1: destination variable
23 # 2: interface
24 network_get_ipaddr() {
25         __network_ifstatus "$1" "$2" "['ipv4-address'][0].address";
26 }
27
28 # determine first IPv6 address of given logical interface
29 # 1: destination variable
30 # 2: interface
31 network_get_ipaddr6() {
32         __network_ifstatus "$1" "$2" "['ipv6-address'][0].address" || \
33                 __network_ifstatus "$1" "$2" "['ipv6-prefix-assignment'][0]['local-address'].address" || \
34                 return 1
35 }
36
37 # determine first IPv4 subnet of given logical interface
38 # 1: destination variable
39 # 2: interface
40 network_get_subnet() {
41         __network_ifstatus "$1" "$2" "['ipv4-address'][0]['address','mask']" "/"
42 }
43
44 # determine first IPv6 subnet of given logical interface
45 # 1: destination variable
46 # 2: interface
47 network_get_subnet6() {
48         local __nets __addr
49
50         if network_get_subnets6 __nets "$2"; then
51                 # Attempt to return first non-fe80::/10, non-fc::/7 range
52                 for __addr in $__nets; do
53                         case "$__addr" in fe[8ab]?:*|f[cd]??:*)
54                                 continue
55                         esac
56                         export "$1=$__addr"
57                         return 0
58                 done
59
60                 # Attempt to return first non-fe80::/10 range
61                 for __addr in $__nets; do
62                         case "$__addr" in fe[8ab]?:*)
63                                 continue
64                         esac
65                         export "$1=$__addr"
66                         return 0
67                 done
68
69                 # Return first item
70                 for __addr in $__nets; do
71                         export "$1=$__addr"
72                         return 0
73                 done
74         fi
75
76         unset "$1"
77         return 1
78 }
79
80 # determine first IPv6 prefix of given logical interface
81 # 1: destination variable
82 # 2: interface
83 network_get_prefix6() {
84         __network_ifstatus "$1" "$2" "['ipv6-prefix'][0]['address','mask']" "/"
85 }
86
87 # determine all IPv4 addresses of given logical interface
88 # 1: destination variable
89 # 2: interface
90 network_get_ipaddrs() {
91         __network_ifstatus "$1" "$2" "['ipv4-address'][*].address"
92 }
93
94 # determine all IPv6 addresses of given logical interface
95 # 1: destination variable
96 # 2: interface
97 network_get_ipaddrs6() {
98         local __addr
99         local __list=""
100
101         if __network_ifstatus "__addr" "$2" "['ipv6-address'][*].address"; then
102                 for __addr in $__addr; do
103                         __list="${__list:+$__list }${__addr}"
104                 done
105         fi
106
107         if __network_ifstatus "__addr" "$2" "['ipv6-prefix-assignment'][*]['local-address'].address"; then
108                 for __addr in $__addr; do
109                         __list="${__list:+$__list }${__addr}"
110                 done
111         fi
112
113         if [ -n "$__list" ]; then
114                 export "$1=$__list"
115                 return 0
116         fi
117
118         unset "$1"
119         return 1
120 }
121
122 # determine all IP addresses of given logical interface
123 # 1: destination variable
124 # 2: interface
125 network_get_ipaddrs_all() {
126         local __addr __addr6
127
128         network_get_ipaddrs __addr "$2"
129         network_get_ipaddrs6 __addr6 "$2"
130
131         if [ -n "$__addr" -o -n "$__addr6" ]; then
132                 export "$1=${__addr:+$__addr }$__addr6"
133                 return 0
134         fi
135
136         unset "$1"
137         return 1
138 }
139
140 # determine all IPv4 subnets of given logical interface
141 # 1: destination variable
142 # 2: interface
143 network_get_subnets() {
144         __network_ifstatus "$1" "$2" "['ipv4-address'][*]['address','mask']" "/ "
145 }
146
147 # determine all IPv6 subnets of given logical interface
148 # 1: destination variable
149 # 2: interface
150 network_get_subnets6() {
151         local __addr __mask
152         local __list=""
153
154         if __network_ifstatus "__addr" "$2" "['ipv6-address'][*]['address','mask']" "/ "; then
155                 for __addr in $__addr; do
156                         __list="${__list:+$__list }${__addr}"
157                 done
158         fi
159
160         if __network_ifstatus "__addr" "$2" "['ipv6-prefix-assignment'][*]['local-address'].address" && \
161            __network_ifstatus "__mask" "$2" "['ipv6-prefix-assignment'][*].mask"; then
162                 for __addr in $__addr; do
163                         __list="${__list:+$__list }${__addr}/${__mask%% *}"
164                         __mask="${__mask#* }"
165                 done
166         fi
167
168         if [ -n "$__list" ]; then
169                 export "$1=$__list"
170                 return 0
171         fi
172
173         unset "$1"
174         return 1
175 }
176
177 # determine all IPv6 prefixes of given logical interface
178 # 1: destination variable
179 # 2: interface
180 network_get_prefixes6() {
181         __network_ifstatus "$1" "$2" "['ipv6-prefix'][*]['address','mask']" "/ "
182 }
183
184 # determine IPv4 gateway of given logical interface
185 # 1: destination variable
186 # 2: interface
187 # 3: consider inactive gateway if "true" (optional)
188 network_get_gateway() {
189         __network_ifstatus "$1" "$2" ".route[@.target='0.0.0.0' && !@.table].nexthop" "" 1 && \
190                 return 0
191
192         [ "$3" = 1 -o "$3" = "true" ] && \
193                 __network_ifstatus "$1" "$2" ".inactive.route[@.target='0.0.0.0' && !@.table].nexthop" "" 1
194 }
195
196 # determine IPv6 gateway of given logical interface
197 # 1: destination variable
198 # 2: interface
199 # 3: consider inactive gateway if "true" (optional)
200 network_get_gateway6() {
201         __network_ifstatus "$1" "$2" ".route[@.target='::' && !@.table].nexthop" "" 1 && \
202                 return 0
203
204         [ "$3" = 1 -o "$3" = "true" ] && \
205                 __network_ifstatus "$1" "$2" ".inactive.route[@.target='::' && !@.table].nexthop" "" 1
206 }
207
208 # determine the DNS servers of the given logical interface
209 # 1: destination variable
210 # 2: interface
211 # 3: consider inactive servers if "true" (optional)
212 network_get_dnsserver() {
213         __network_ifstatus "$1" "$2" "['dns-server'][*]" && return 0
214
215         [ "$3" = 1 -o "$3" = "true" ] && \
216                 __network_ifstatus "$1" "$2" ".inactive['dns-server'][*]"
217 }
218
219 # determine the domains of the given logical interface
220 # 1: destination variable
221 # 2: interface
222 # 3: consider inactive domains if "true" (optional)
223 network_get_dnssearch() {
224         __network_ifstatus "$1" "$2" "['dns-search'][*]" && return 0
225
226         [ "$3" = 1 -o "$3" = "true" ] && \
227                 __network_ifstatus "$1" "$2" ".inactive['dns-search'][*]"
228 }
229
230
231 # 1: destination variable
232 # 2: addr
233 # 3: inactive
234 __network_wan()
235 {
236         __network_ifstatus "$1" "" \
237                 "[@.route[@.target='$2' && !@.table]].interface" "" 1 && \
238                         return 0
239
240         [ "$3" = 1 -o "$3" = "true" ] && \
241                 __network_ifstatus "$1" "" \
242                         "[@.inactive.route[@.target='$2' && !@.table]].interface" "" 1
243 }
244
245 # find the logical interface which holds the current IPv4 default route
246 # 1: destination variable
247 # 2: consider inactive default routes if "true" (optional)
248 network_find_wan() { __network_wan "$1" "0.0.0.0" "$2"; }
249
250 # find the logical interface which holds the current IPv6 default route
251 # 1: destination variable
252 # 2: consider inactive dafault routes if "true" (optional)
253 network_find_wan6() { __network_wan "$1" "::" "$2"; }
254
255 # test whether the given logical interface is running
256 # 1: interface
257 network_is_up()
258 {
259         local __up
260         __network_ifstatus "__up" "$1" ".up" && [ "$__up" = 1 ]
261 }
262
263 # determine the protocol of the given logical interface
264 # 1: destination variable
265 # 2: interface
266 network_get_protocol() { __network_ifstatus "$1" "$2" ".proto"; }
267
268 # determine the layer 3 linux network device of the given logical interface
269 # 1: destination variable
270 # 2: interface
271 network_get_device() { __network_ifstatus "$1" "$2" ".l3_device"; }
272
273 # determine the layer 2 linux network device of the given logical interface
274 # 1: destination variable
275 # 2: interface
276 network_get_physdev() { __network_ifstatus "$1" "$2" ".device"; }
277
278 # defer netifd actions on the given linux network device
279 # 1: device name
280 network_defer_device()
281 {
282         ubus call network.device set_state \
283                 "$(printf '{ "name": "%s", "defer": true }' "$1")" 2>/dev/null
284 }
285
286 # continue netifd actions on the given linux network device
287 # 1: device name
288 network_ready_device()
289 {
290         ubus call network.device set_state \
291                 "$(printf '{ "name": "%s", "defer": false }' "$1")" 2>/dev/null
292 }
293
294 # flush the internal value cache to force re-reading values from ubus
295 network_flush_cache() { unset __NETWORK_CACHE; }