1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
5 * (Software) available for public use and benefit with the expectation
6 * that others will use, modify and enhance the Software and contribute
7 * those enhancements back to the community. However, since we would
8 * like to make the Software available for broadest use, with as few
9 * restrictions as possible permission is hereby granted, free of
10 * charge, to any person obtaining a copy of this Software to deal in
11 * the Software under the copyrights without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * The name and trademarks of copyright holder(s) may NOT be used in
30 * advertising or publicity pertaining to the Software or any
31 * derivatives without specific, written prior permission.
35 #include "dhcp-client.h"
36 #include <arpa/inet.h>
40 #include "command-line.h"
42 #include "fatal-signal.h"
44 #include "poll-loop.h"
48 /* --request-ip: IP address to request from server. If zero, then do not
49 * request a specific IP address. */
50 static struct in_addr request_ip;
52 /* --vendor-class: Vendor class string to include in request. If null, no
53 * vendor class string is included. */
54 static const char *vendor_class;
56 /* --no-resolv-conf: Update /etc/resolv.conf to match DHCP reply? */
57 static bool update_resolv_conf = true;
59 static void parse_options(int argc, char *argv[]);
60 static void usage(void);
61 static void release(void *cli_);
62 static void modify_dhcp_request(struct dhcp_msg *, void *aux);
65 main(int argc, char *argv[])
70 set_program_name(argv[0]);
71 register_fault_handlers();
73 parse_options(argc, argv);
78 ofp_fatal(0, "exactly one non-option argument required; "
79 "use --help for help");
82 error = dhclient_create(argv[0], modify_dhcp_request, NULL, NULL, &cli);
84 ofp_fatal(error, "dhclient_create failed");
86 dhclient_init(cli, request_ip.s_addr);
87 fatal_signal_add_hook(release, cli, true);
92 if (dhclient_changed(cli)) {
93 dhclient_configure_netdev(cli);
94 if (update_resolv_conf) {
95 dhclient_update_resolv_conf(cli);
99 fatal_signal_unblock();
107 struct dhclient *cli = cli_;
108 dhclient_release(cli);
109 if (dhclient_changed(cli)) {
110 dhclient_configure_netdev(cli);
115 modify_dhcp_request(struct dhcp_msg *msg, void *aux UNUSED)
118 dhcp_msg_put_string(msg, DHCP_CODE_VENDOR_CLASS, vendor_class);
123 parse_options(int argc, char *argv[])
126 OPT_REQUEST_IP = UCHAR_MAX + 1,
130 static struct option long_options[] = {
131 {"request-ip", required_argument, 0, OPT_REQUEST_IP },
132 {"vendor-class", required_argument, 0, OPT_VENDOR_CLASS },
133 {"no-resolv-conf", no_argument, 0, OPT_NO_RESOLV_CONF},
134 {"verbose", optional_argument, 0, 'v'},
135 {"help", no_argument, 0, 'h'},
136 {"version", no_argument, 0, 'V'},
139 char *short_options = long_options_to_short_options(long_options);
144 c = getopt_long(argc, argv, short_options, long_options, NULL);
151 if (!inet_aton(optarg, &request_ip)) {
153 "--request-ip argument is not a valid IP address");
157 case OPT_VENDOR_CLASS:
158 vendor_class = optarg;
161 case OPT_NO_RESOLV_CONF:
162 update_resolv_conf = false;
169 printf("%s "VERSION" compiled "__DATE__" "__TIME__"\n", argv[0]);
173 vlog_set_verbosity(optarg);
189 printf("%s: standalone program for testing OpenFlow DHCP client.\n"
190 "usage: %s [OPTIONS] NETDEV\n"
191 "where NETDEV is a network device (e.g. eth0).\n"
193 " --request-ip=IP request specified IP address (default:\n"
194 " do not request a specific IP)\n"
195 " --vendor-class=STRING use STRING as vendor class (default:\n"
196 " none); use OpenFlow to imitate secchan\n"
197 " --no-resolv-conf do not update /etc/resolv.conf\n"
199 " -v, --verbose=MODULE[:FACILITY[:LEVEL]] set logging levels\n"
200 " -v, --verbose set maximum verbosity level\n"
201 " -h, --help display this help message\n"
202 " -V, --version display version information\n",
203 program_name, program_name);