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2 * Copyright (c) 2008, 2009 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"
27 #include "poll-loop.h"
31 /* --request-ip: IP address to request from server. If zero, then do not
32 * request a specific IP address. */
33 static struct in_addr request_ip
;
35 /* --vendor-class: Vendor class string to include in request. If null, no
36 * vendor class string is included. */
37 static const char *vendor_class
;
39 /* --no-resolv-conf: Update /etc/resolv.conf to match DHCP reply? */
40 static bool update_resolv_conf
= true;
42 static void parse_options(int argc
, char *argv
[]);
43 static void usage(void);
44 static void release(void *cli_
);
45 static void modify_dhcp_request(struct dhcp_msg
*, void *aux
);
48 main(int argc
, char *argv
[])
53 set_program_name(argv
[0]);
54 register_fault_handlers();
56 parse_options(argc
, argv
);
61 ovs_fatal(0, "exactly one non-option argument required; "
62 "use --help for help");
65 error
= dhclient_create(argv
[0], modify_dhcp_request
, NULL
, NULL
, &cli
);
67 ovs_fatal(error
, "dhclient_create failed");
69 dhclient_init(cli
, request_ip
.s_addr
);
70 fatal_signal_add_hook(release
, cli
, true);
75 if (dhclient_changed(cli
)) {
76 dhclient_configure_netdev(cli
);
77 if (update_resolv_conf
) {
78 dhclient_update_resolv_conf(cli
);
82 fatal_signal_unblock();
90 struct dhclient
*cli
= cli_
;
91 dhclient_release(cli
);
92 if (dhclient_changed(cli
)) {
93 dhclient_configure_netdev(cli
);
98 modify_dhcp_request(struct dhcp_msg
*msg
, void *aux UNUSED
)
101 dhcp_msg_put_string(msg
, DHCP_CODE_VENDOR_CLASS
, vendor_class
);
106 parse_options(int argc
, char *argv
[])
109 OPT_REQUEST_IP
= UCHAR_MAX
+ 1,
113 static struct option long_options
[] = {
114 {"request-ip", required_argument
, 0, OPT_REQUEST_IP
},
115 {"vendor-class", required_argument
, 0, OPT_VENDOR_CLASS
},
116 {"no-resolv-conf", no_argument
, 0, OPT_NO_RESOLV_CONF
},
117 {"verbose", optional_argument
, 0, 'v'},
118 {"help", no_argument
, 0, 'h'},
119 {"version", no_argument
, 0, 'V'},
122 char *short_options
= long_options_to_short_options(long_options
);
127 c
= getopt_long(argc
, argv
, short_options
, long_options
, NULL
);
134 if (!inet_aton(optarg
, &request_ip
)) {
136 "--request-ip argument is not a valid IP address");
140 case OPT_VENDOR_CLASS
:
141 vendor_class
= optarg
;
144 case OPT_NO_RESOLV_CONF
:
145 update_resolv_conf
= false;
152 printf("%s %s compiled "__DATE__
" "__TIME__
"\n",
153 program_name
, VERSION BUILDNR
);
157 vlog_set_verbosity(optarg
);
173 printf("%s: standalone program for testing Open vSwitch DHCP client.\n"
174 "usage: %s [OPTIONS] NETDEV\n"
175 "where NETDEV is a network device (e.g. eth0).\n"
177 " --request-ip=IP request specified IP address (default:\n"
178 " do not request a specific IP)\n"
179 " --vendor-class=STRING use STRING as vendor class; use\n"
180 " OpenFlow to imitate ovs-openflowd\n"
181 " --no-resolv-conf do not update /etc/resolv.conf\n",
182 program_name
, program_name
);
184 printf("\nOther options:\n"
185 " -h, --help display this help message\n"
186 " -V, --version display version information\n");