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Diffstat (limited to 'tests/test-dhcp-client.c')
| -rw-r--r-- | tests/test-dhcp-client.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/tests/test-dhcp-client.c b/tests/test-dhcp-client.c new file mode 100644 index 000000000..2fee3fc11 --- /dev/null +++ b/tests/test-dhcp-client.c @@ -0,0 +1,189 @@ +/* + * Copyright (c) 2008, 2009 Nicira Networks. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <config.h> +#include "dhcp-client.h" +#include <arpa/inet.h> +#include <getopt.h> +#include <stdlib.h> +#include <limits.h> +#include "command-line.h" +#include "dhcp.h" +#include "fatal-signal.h" +#include "fault.h" +#include "poll-loop.h" +#include "util.h" +#include "vlog.h" + +/* --request-ip: IP address to request from server. If zero, then do not + * request a specific IP address. */ +static struct in_addr request_ip; + +/* --vendor-class: Vendor class string to include in request. If null, no + * vendor class string is included. */ +static const char *vendor_class; + +/* --no-resolv-conf: Update /etc/resolv.conf to match DHCP reply? */ +static bool update_resolv_conf = true; + +static void parse_options(int argc, char *argv[]); +static void usage(void); +static void release(void *cli_); +static void modify_dhcp_request(struct dhcp_msg *, void *aux); + +int +main(int argc, char *argv[]) +{ + struct dhclient *cli; + int error; + + set_program_name(argv[0]); + register_fault_handlers(); + vlog_init(); + parse_options(argc, argv); + + argc -= optind; + argv += optind; + if (argc != 1) { + ovs_fatal(0, "exactly one non-option argument required; " + "use --help for help"); + } + + error = dhclient_create(argv[0], modify_dhcp_request, NULL, NULL, &cli); + if (error) { + ovs_fatal(error, "dhclient_create failed"); + } + dhclient_init(cli, request_ip.s_addr); + fatal_signal_add_hook(release, cli, true); + + for (;;) { + fatal_signal_block(); + dhclient_run(cli); + if (dhclient_changed(cli)) { + dhclient_configure_netdev(cli); + if (update_resolv_conf) { + dhclient_update_resolv_conf(cli); + } + } + dhclient_wait(cli); + fatal_signal_unblock(); + poll_block(); + } +} + +static void +release(void *cli_) +{ + struct dhclient *cli = cli_; + dhclient_release(cli); + if (dhclient_changed(cli)) { + dhclient_configure_netdev(cli); + } +} + +static void +modify_dhcp_request(struct dhcp_msg *msg, void *aux UNUSED) +{ + if (vendor_class) { + dhcp_msg_put_string(msg, DHCP_CODE_VENDOR_CLASS, vendor_class); + } +} + +static void +parse_options(int argc, char *argv[]) +{ + enum { + OPT_REQUEST_IP = UCHAR_MAX + 1, + OPT_VENDOR_CLASS, + OPT_NO_RESOLV_CONF + }; + static struct option long_options[] = { + {"request-ip", required_argument, 0, OPT_REQUEST_IP }, + {"vendor-class", required_argument, 0, OPT_VENDOR_CLASS }, + {"no-resolv-conf", no_argument, 0, OPT_NO_RESOLV_CONF}, + {"verbose", optional_argument, 0, 'v'}, + {"help", no_argument, 0, 'h'}, + {"version", no_argument, 0, 'V'}, + {0, 0, 0, 0}, + }; + char *short_options = long_options_to_short_options(long_options); + + for (;;) { + int c; + + c = getopt_long(argc, argv, short_options, long_options, NULL); + if (c == -1) { + break; + } + + switch (c) { + case OPT_REQUEST_IP: + if (!inet_aton(optarg, &request_ip)) { + ovs_fatal(0, + "--request-ip argument is not a valid IP address"); + } + break; + + case OPT_VENDOR_CLASS: + vendor_class = optarg; + break; + + case OPT_NO_RESOLV_CONF: + update_resolv_conf = false; + break; + + case 'h': + usage(); + + case 'V': + printf("%s %s compiled "__DATE__" "__TIME__"\n", + program_name, VERSION BUILDNR); + exit(EXIT_SUCCESS); + + case 'v': + vlog_set_verbosity(optarg); + break; + + case '?': + exit(EXIT_FAILURE); + + default: + abort(); + } + } + free(short_options); +} + +static void +usage(void) +{ + printf("%s: standalone program for testing Open vSwitch DHCP client.\n" + "usage: %s [OPTIONS] NETDEV\n" + "where NETDEV is a network device (e.g. eth0).\n" + "\nDHCP options:\n" + " --request-ip=IP request specified IP address (default:\n" + " do not request a specific IP)\n" + " --vendor-class=STRING use STRING as vendor class (default:\n" + " none); use OpenFlow to imitate secchan\n" + " --no-resolv-conf do not update /etc/resolv.conf\n", + program_name, program_name); + vlog_usage(); + printf("\nOther options:\n" + " -h, --help display this help message\n" + " -V, --version display version information\n"); + exit(EXIT_SUCCESS); +} + |