2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include "dhcp-client.h"
19 #include <arpa/inet.h>
23 #include "command-line.h"
25 #include "fatal-signal.h"
26 #include "poll-loop.h"
30 /* --request-ip: IP address to request from server. If zero, then do not
31 * request a specific IP address. */
32 static struct in_addr request_ip;
34 /* --vendor-class: Vendor class string to include in request. If null, no
35 * vendor class string is included. */
36 static const char *vendor_class;
38 /* --no-resolv-conf: Update /etc/resolv.conf to match DHCP reply? */
39 static bool update_resolv_conf = true;
41 static void parse_options(int argc, char *argv[]);
42 static void usage(void);
43 static void release(void *cli_);
44 static void modify_dhcp_request(struct dhcp_msg *, void *aux);
47 main(int argc, char *argv[])
52 set_program_name(argv[0]);
53 parse_options(argc, argv);
58 ovs_fatal(0, "exactly one non-option argument required; "
59 "use --help for help");
62 error = dhclient_create(argv[0], modify_dhcp_request, NULL, NULL, &cli);
64 ovs_fatal(error, "dhclient_create failed");
66 dhclient_init(cli, request_ip.s_addr);
67 fatal_signal_add_hook(release, NULL, cli, true);
71 if (dhclient_changed(cli)) {
72 dhclient_configure_netdev(cli);
73 if (update_resolv_conf) {
74 dhclient_update_resolv_conf(cli);
85 struct dhclient *cli = cli_;
86 dhclient_release(cli);
87 if (dhclient_changed(cli)) {
88 dhclient_configure_netdev(cli);
93 modify_dhcp_request(struct dhcp_msg *msg, void *aux OVS_UNUSED)
96 dhcp_msg_put_string(msg, DHCP_CODE_VENDOR_CLASS, vendor_class);
101 parse_options(int argc, char *argv[])
104 OPT_REQUEST_IP = UCHAR_MAX + 1,
108 static struct option long_options[] = {
109 {"request-ip", required_argument, 0, OPT_REQUEST_IP },
110 {"vendor-class", required_argument, 0, OPT_VENDOR_CLASS },
111 {"no-resolv-conf", no_argument, 0, OPT_NO_RESOLV_CONF},
112 {"verbose", optional_argument, 0, 'v'},
113 {"help", no_argument, 0, 'h'},
114 {"version", no_argument, 0, 'V'},
117 char *short_options = long_options_to_short_options(long_options);
122 c = getopt_long(argc, argv, short_options, long_options, NULL);
129 if (!inet_aton(optarg, &request_ip)) {
131 "--request-ip argument is not a valid IP address");
135 case OPT_VENDOR_CLASS:
136 vendor_class = optarg;
139 case OPT_NO_RESOLV_CONF:
140 update_resolv_conf = false;
147 printf("%s %s compiled "__DATE__" "__TIME__"\n",
148 program_name, VERSION BUILDNR);
152 vlog_set_verbosity(optarg);
168 printf("%s: standalone program for testing Open vSwitch DHCP client.\n"
169 "usage: %s [OPTIONS] NETDEV\n"
170 "where NETDEV is a network device (e.g. eth0).\n"
172 " --request-ip=IP request specified IP address (default:\n"
173 " do not request a specific IP)\n"
174 " --vendor-class=STRING use STRING as vendor class; use\n"
175 " OpenFlow to imitate ovs-openflowd\n"
176 " --no-resolv-conf do not update /etc/resolv.conf\n",
177 program_name, program_name);
179 printf("\nOther options:\n"
180 " -h, --help display this help message\n"
181 " -V, --version display version information\n");