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cccb3a4b MT |
1 | #!/bin/bash |
2 | ############################################################################### | |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
9390b61b | 5 | # Copyright (C) 2012-2013 IPFire Network Development Team # |
cccb3a4b MT |
6 | # # |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
21 | ||
91c8cce9 | 22 | IP_TUNNEL_MODES="gre sit vti" |
cccb3a4b | 23 | |
376629dc JS |
24 | # This function converts our modes into the type |
25 | # the iproute2 tool uses | |
26 | ip_tunnel_convert_mode_to_iproute2_mode() { | |
27 | local mode=${1} | |
28 | local protocol=${2} | |
29 | ||
30 | if ! isset mode || ! isset protocol; then | |
31 | log ERROR "Did not get mode and/or protocol" | |
32 | return ${EXIT_ERROR} | |
33 | fi | |
34 | ||
35 | if [[ "${protocol}" = "ipv4" ]]; then | |
36 | # When we use IPv4 we can use our modes | |
37 | echo "${mode}" | |
38 | fi | |
39 | ||
40 | if [[ "${protocol}" = "ipv6" ]]; then | |
41 | # When we use IPv6 we have to convert | |
42 | case "${mode}" in | |
43 | "vti") | |
44 | echo "vti6" | |
45 | ;; | |
46 | "gre") | |
47 | echo "ip6gre" | |
48 | esac | |
49 | fi | |
50 | } | |
51 | ||
1c6a4e30 | 52 | ip_tunnel_add() { |
cccb3a4b MT |
53 | local device=${1} |
54 | shift | |
55 | ||
1a02da59 | 56 | local mode |
cccb3a4b MT |
57 | local ttl |
58 | ||
59 | local remote_address | |
60 | local local_address | |
61 | ||
1a02da59 MT |
62 | local ikey |
63 | local okey | |
64 | ||
cccb3a4b MT |
65 | while [ $# -gt 0 ]; do |
66 | case "${1}" in | |
67 | --mode=*) | |
2212045f | 68 | mode="$(cli_get_val "${1}")" |
cccb3a4b MT |
69 | ;; |
70 | --ttl=*) | |
2212045f | 71 | ttl="$(cli_get_val "${1}")" |
cccb3a4b | 72 | ;; |
cccb3a4b | 73 | --remote-address=*) |
2212045f | 74 | remote_address="$(cli_get_val "${1}")" |
cccb3a4b MT |
75 | ;; |
76 | --local-address=*) | |
2212045f | 77 | local_address="$(cli_get_val "${1}")" |
cccb3a4b | 78 | ;; |
1a02da59 MT |
79 | |
80 | # Keys for VTI | |
81 | --ikey=*) | |
2212045f | 82 | ikey="$(cli_get_val "${1}")" |
1a02da59 MT |
83 | ;; |
84 | --okey=*) | |
2212045f | 85 | okey="$(cli_get_val "${1}")" |
1a02da59 | 86 | ;; |
cccb3a4b MT |
87 | esac |
88 | shift | |
89 | done | |
90 | ||
1a02da59 MT |
91 | if ! isset mode; then |
92 | error "--mode= is not set. Must be one of ${IP_TUNNEL_MODES}" | |
93 | return ${EXIT_ERROR} | |
94 | fi | |
95 | ||
96 | if ! isoneof mode ${IP_TUNNEL_MODES}; then | |
97 | error "Invalid mode: ${mode}" | |
98 | return ${EXIT_ERROR} | |
99 | fi | |
100 | ||
5bbd1fab JS |
101 | # Detect the IP protocol, which is important to decide which mode we have to use |
102 | local remote_address_protocol="$(ip_detect_protocol "${remote_address}")" | |
103 | ||
104 | # If we could not detect the IP protocol something with | |
105 | # ${remote_address} is wrong | |
106 | if ! isset remote_address_protocol; then | |
107 | log ERROR "Could not determine remote address IP protocol" | |
108 | return ${EXIT_ERROR} | |
109 | fi | |
110 | ||
111 | # We cannot mix IPv6 and IPv4 | |
112 | if [[ "${remote_address_protocol}" != \ | |
113 | "$(ip_detect_protocol "${local_address}")" ]] ; then | |
114 | log ERROR "Local and remote address\ | |
115 | are not from the same IP protocol" | |
116 | return ${EXIT_ERROR} | |
117 | fi | |
118 | ||
1a02da59 MT |
119 | # ikey and okey must be set for VTI devices |
120 | if [ "${mode}" = "vti" ] && (! isset ikey || ! isset okey); then | |
121 | error "--ikey= and --okey= must be set for VTI device" | |
122 | return ${EXIT_ERROR} | |
123 | fi | |
cccb3a4b MT |
124 | |
125 | # If TTL is set, make sure it is an integer. | |
1a02da59 MT |
126 | if isset ttl && ! isinteger ttl; then |
127 | error "TTL must be an integer: ${ttl}" | |
128 | return ${EXIT_ERROR} | |
129 | fi | |
cccb3a4b | 130 | |
cccb3a4b MT |
131 | local cmd_args |
132 | ||
133 | # Apply TTL if a value has been set. | |
134 | if isset ttl; then | |
135 | cmd_args="${cmd_args} ttl ${ttl}" | |
136 | fi | |
137 | ||
eec68f19 MT |
138 | # Apply local address if a value has been set. |
139 | if isset local_address; then | |
140 | cmd_args="${cmd_args} local ${local_address}" | |
141 | fi | |
142 | ||
9390b61b SS |
143 | # Apply remote address if a value has been set. |
144 | if isset remote_address; then | |
145 | cmd_args="${cmd_args} remote ${remote_address}" | |
146 | fi | |
147 | ||
1a02da59 MT |
148 | # Add ikey and okey for VTI devices |
149 | if [ "${mode}" = "vti" ]; then | |
150 | cmd_args="${cmd_args} ikey ${ikey} okey ${okey}" | |
151 | fi | |
152 | ||
dff38496 JS |
153 | # Determine the mode based on the IP protocol |
154 | mode=$(ip_tunnel_convert_mode_to_iproute2_mode "${mode}" "${remote_address_protocol}") | |
155 | ||
cccb3a4b MT |
156 | log DEBUG "Creating tunnel device '${device}' (mode=${mode})..." |
157 | ||
158 | # Create the device. | |
d7357cc3 | 159 | if ! cmd ip link add name ${device} type ${mode} ${cmd_args}; then |
1a02da59 MT |
160 | error "Could not create tunnel device ${device}" |
161 | return ${EXIT_ERROR} | |
162 | fi | |
ea1857e3 MT |
163 | |
164 | # Disable policy lookups for VTI devices | |
165 | if [ "${mode}" = "vti" ]; then | |
166 | sysctl_set "net.ipv4.conf.${device}.disable_policy" "1" | |
167 | fi | |
168 | ||
169 | return ${EXIT_OK} | |
cccb3a4b MT |
170 | } |
171 | ||
1c6a4e30 | 172 | ip_tunnel_del() { |
21e8d1aa | 173 | device_delete "$@" |
cccb3a4b | 174 | } |
82fac748 MT |
175 | |
176 | ip_tunnel_change_keys() { | |
177 | local device="${1}" | |
178 | shift | |
179 | ||
180 | if ! isset device; then | |
181 | error "No device given" | |
182 | return ${EXIT_ERROR} | |
183 | fi | |
184 | ||
185 | local ikey | |
186 | local okey | |
187 | ||
188 | while [ $# -gt 0 ]; do | |
189 | case "${1}" in | |
190 | --ikey=*) | |
191 | ikey="$(cli_get_val ${1})" | |
192 | ;; | |
193 | --okey=*) | |
194 | okey="$(cli_get_val ${1})" | |
195 | ;; | |
196 | *) | |
197 | error "Invalid argument: ${1}" | |
198 | return ${EXIT_ERROR} | |
199 | ;; | |
200 | esac | |
201 | shift | |
202 | done | |
203 | ||
204 | if ! isset ikey || ! isset okey; then | |
205 | error "You need to set --ikey= and --okey=" | |
206 | return ${EXIT_ERROR} | |
207 | fi | |
208 | ||
209 | if ! device_exists "${device}"; then | |
210 | error "No such device: ${device}" | |
211 | return ${EXIT_ERROR} | |
212 | fi | |
213 | ||
dff38496 JS |
214 | # Determine the device type |
215 | local type="$(device_tunnel_get_type ${device})" | |
216 | ||
217 | if ! isoneof "type" vti vti6; then | |
218 | log ERROR "Device type '${type}' is invalid" | |
219 | return ${EXIT_ERROR} | |
220 | fi | |
221 | ||
82fac748 | 222 | if ! cmd ip link change dev "${device}" \ |
dff38496 | 223 | type "${type}" ikey "${ikey}" okey "${okey}"; then |
82fac748 MT |
224 | log ERROR "Could not change keys of device ${device}" |
225 | return ${EXIT_ERROR} | |
226 | fi | |
227 | ||
228 | return ${EXIT_OK} | |
229 | } |