Fix alignment of hash buffer in dhcpv6_response_is_valid
[odhcp6c.git] / odhcp6c-example-script.sh
1 #!/bin/sh
2 [ -z "$2" ] && echo "Error: should be run by odhcpc6c" && exit 1
3
4 update_resolv() {
5         local device="$1"
6         local dns="$2"
7         
8         (
9                 flock 9
10                 grep -v "#odhcp6c:$device:" /etc/resolv.conf > /tmp/resolv.conf.tmp
11                 for c in $dns; do
12                         echo "nameserver $c #odhcp6c:$device:" >> /tmp/resolv.conf.tmp
13                 done
14                 mv /tmp/resolv.conf.tmp /etc/resolv.conf
15                 chmod 0644 /etc/resolv.conf
16         ) 9>/tmp/resolv.conf.lock
17         rm -f /tmp/resolv.conf.lock /tmp/resolv.conf.tmp
18 }
19
20 setup_interface () {
21         local device="$1"
22
23         # Merge RA-DNS
24         for radns in $RA_DNS; do
25                 local duplicate=0
26                 for dns in $RDNSS; do
27                         [ "$radns" = "$dns" ] && duplicate=1
28                 done
29                 [ "$duplicate" = 0 ] && RDNSS="$RDNSS $radns"
30         done
31
32         local dnspart=""
33         for dns in $RDNSS; do
34                 if [ -z "$dnspart" ]; then
35                         dnspart="\"$dns\""
36                 else
37                         dnspart="$dnspart, \"$dns\""
38                 fi
39         done
40
41         update_resolv "$device" "$dns"
42
43         local prefixpart=""
44         for entry in $PREFIXES; do
45                 local addr="${entry%%,*}"
46                 entry="${entry#*,}"
47                 local preferred="${entry%%,*}"
48                 entry="${entry#*,}"
49                 local valid="${entry%%,*}"
50                 entry="${entry#*,}"
51                 [ "$entry" = "$valid" ] && entry=
52
53                 local class=""
54                 local excluded=""
55
56                 while [ -n "$entry" ]; do
57                         local key="${entry%%=*}"
58                         entry="${entry#*=}"
59                         local val="${entry%%,*}"
60                         entry="${entry#*,}"
61                         [ "$entry" = "$val" ] && entry=
62
63                         if [ "$key" = "class" ]; then
64                                 class=", \"class\": $val"
65                         elif [ "$key" = "excluded" ]; then
66                                 excluded=", \"excluded\": \"$val\""
67                         fi
68                 done
69
70                 local prefix="{\"address\": \"$addr\", \"preferred\": $preferred, \"valid\": $valid $class $excluded}"
71                 
72                 if [ -z "$prefixpart" ]; then
73                         prefixpart="$prefix"
74                 else
75                         prefixpart="$prefixpart, $prefix"
76                 fi
77
78                 # TODO: delete this somehow when the prefix disappears
79                 ip -6 route add unreachable "$addr"
80         done
81
82         ip -6 route flush dev "$device"
83         ip -6 address flush dev "$device" scope global
84
85         # Merge addresses
86         for entry in $RA_ADDRESSES; do
87                 local duplicate=0
88                 local addr="${entry%%/*}"
89                 for dentry in $ADDRESSES; do
90                         local daddr="${dentry%%/*}"
91                         [ "$addr" = "$daddr" ] && duplicate=1
92                 done
93                 [ "$duplicate" = "0" ] && ADDRESSES="$ADDRESSES $entry"
94         done
95
96         for entry in $ADDRESSES; do
97                 local addr="${entry%%,*}"
98                 entry="${entry#*,}"
99                 local preferred="${entry%%,*}"
100                 entry="${entry#*,}"
101                 local valid="${entry%%,*}"
102
103                 ip -6 address add "$addr" dev "$device" preferred_lft "$preferred" valid_lft "$valid" 
104         done
105
106         for entry in $RA_ROUTES; do
107                 local addr="${entry%%,*}"
108                 entry="${entry#*,}"
109                 local gw="${entry%%,*}"
110                 entry="${entry#*,}"
111                 local valid="${entry%%,*}"
112                 entry="${entry#*,}"
113                 local metric="${entry%%,*}"
114
115                 if [ -n "$gw" ]; then
116                         ip -6 route add "$addr" via "$gw" metric "$metric" dev "$device" from "::/128"
117                 else
118                         ip -6 route add "$addr" metric "$metric" dev "$device"
119                 fi
120
121                 for prefix in $PREFIXES; do
122                         local paddr="${prefix%%,*}"
123                         [ -n "$gw" ] && ip -6 route add "$addr" via "$gw" metric "$metric" dev "$device" from "$paddr"
124                 done
125         done
126 }
127
128 teardown_interface() {
129         local device="$1"
130         ip -6 route flush dev "$device"
131         ip -6 address flush dev "$device" scope global
132         update_resolv "$device" ""
133 }
134
135 (
136         flock 9
137         case "$2" in
138                 bound)
139                         teardown_interface "$1"
140                         setup_interface "$1"
141                 ;;
142                 informed|updated|rebound|ra-updated)
143                         setup_interface "$1"
144                 ;;
145                 stopped|unbound)
146                         teardown_interface "$1"
147                 ;;
148                 started)
149                         teardown_interface "$1"
150                 ;;
151         esac
152
153         # user rules
154         [ -f /etc/odhcp6c.user ] && . /etc/odhcp6c.user
155 ) 9>/tmp/odhcp6c.lock.$1
156 rm -f /tmp/odhcp6c.lock.$1