mir/isc-dhcp
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/dhcp synced 2025-08-31 06:15:55 +00:00
Code Issues Releases Wiki Activity

merge 17500

Browse Source
This commit is contained in:
Francis Dupont
2008-05-23 13:56:07 +00:00
parent 3dbe22465b
commit 420d8b3f0c
10 changed files with 1368 additions and 535 deletions
Download Patch File Download Diff File Expand all files Collapse all files

421
client/dhclient.c
View File

@@ -44,7 +44,7 @@ TIME max_lease_time = 86400; /* 24 hours... */
const char *path_dhclient_conf = _PATH_DHCLIENT_CONF;
const char *path_dhclient_db = NULL;
const char *path_dhclient_pid = NULL;
static char path_dhclient_script_array [] = _PATH_DHCLIENT_SCRIPT;
static char path_dhclient_script_array[] = _PATH_DHCLIENT_SCRIPT;
char *path_dhclient_script = path_dhclient_script_array;
int dhcp_max_agent_option_packet_length = 0;
@@ -67,20 +67,23 @@ static char arr [] = "All rights reserved.";
static char message [] = "Internet Systems Consortium DHCP Client";
static char url [] = "For info, please visit http://www.isc.org/sw/dhcp/";
u_int16_t local_port=0;
u_int16_t remote_port=0;
int no_daemon=0;
struct string_list *client_env=NULL;
int client_env_count=0;
int onetry=0;
int quiet=1;
int nowait=0;
int stateless=0;
u_int16_t local_port = 0;
u_int16_t remote_port = 0;
int no_daemon = 0;
struct string_list *client_env = NULL;
int client_env_count = 0;
int onetry = 0;
int quiet = 1;
int nowait = 0;
int stateless = 0;
int wanted_ia_na = -1; /* the absolute value is the real one. */
int wanted_ia_ta = 0;
int wanted_ia_pd = 0;
char *mockup_relay = NULL;
void run_stateless(int exit_mode);
static void usage PROTO ((void));
static void usage(void);
static isc_result_t write_duid(struct data_string *duid);
@@ -91,7 +94,7 @@ main(int argc, char **argv) {
struct interface_info *ip;
struct client_state *client;
unsigned seed;
char *server = (char *)0;
char *server = NULL;
isc_result_t status;
int exit_mode = 0;
int release_mode = 0;
@@ -124,21 +127,21 @@ main(int argc, char **argv) {
else if (fd != -1)
close(fd);
openlog ("dhclient", LOG_NDELAY, LOG_DAEMON);
openlog("dhclient", LOG_NDELAY, LOG_DAEMON);
#if !(defined (DEBUG) || defined (__CYGWIN32__))
setlogmask (LOG_UPTO (LOG_INFO));
#if !(defined(DEBUG) || defined(__CYGWIN32__))
setlogmask(LOG_UPTO(LOG_INFO));
#endif
/* Set up the OMAPI. */
status = omapi_init ();
status = omapi_init();
if (status != ISC_R_SUCCESS)
log_fatal ("Can't initialize OMAPI: %s",
isc_result_totext (status));
log_fatal("Can't initialize OMAPI: %s",
isc_result_totext(status));
/* Set up the OMAPI wrappers for various server database internal
objects. */
dhcp_common_objects_setup ();
dhcp_common_objects_setup();
dhcp_interface_discovery_hook = dhclient_interface_discovery_hook;
dhcp_interface_shutdown_hook = dhclient_interface_shutdown_hook;
@@ -162,117 +165,160 @@ main(int argc, char **argv) {
local_family_set = 1;
local_family = AF_INET6;
#endif /* DHCPv6 */
} else if (!strcmp (argv [i], "-x")) { /* eXit, no release */
} else if (!strcmp(argv[i], "-x")) { /* eXit, no release */
release_mode = 0;
no_daemon = 0;
exit_mode = 1;
} else if (!strcmp (argv [i], "-p")) {
} else if (!strcmp(argv[i], "-p")) {
if (++i == argc)
usage ();
local_port = htons (atoi (argv [i]));
log_debug ("binding to user-specified port %d",
ntohs (local_port));
} else if (!strcmp (argv [i], "-d")) {
usage();
local_port = htons(atoi(argv[i]));
log_debug("binding to user-specified port %d",
ntohs(local_port));
} else if (!strcmp(argv[i], "-d")) {
no_daemon = 1;
quiet = 0;
} else if (!strcmp (argv [i], "-pf")) {
} else if (!strcmp(argv[i], "-pf")) {
if (++i == argc)
usage ();
path_dhclient_pid = argv [i];
usage();
path_dhclient_pid = argv[i];
no_dhclient_pid = 1;
} else if (!strcmp (argv [i], "-cf")) {
} else if (!strcmp(argv[i], "-cf")) {
if (++i == argc)
usage ();
path_dhclient_conf = argv [i];
usage();
path_dhclient_conf = argv[i];
no_dhclient_conf = 1;
} else if (!strcmp (argv [i], "-lf")) {
} else if (!strcmp(argv[i], "-lf")) {
if (++i == argc)
usage ();
path_dhclient_db = argv [i];
usage();
path_dhclient_db = argv[i];
no_dhclient_db = 1;
} else if (!strcmp (argv [i], "-sf")) {
} else if (!strcmp(argv[i], "-sf")) {
if (++i == argc)
usage ();
path_dhclient_script = argv [i];
usage();
path_dhclient_script = argv[i];
no_dhclient_script = 1;
} else if (!strcmp (argv [i], "-1")) {
} else if (!strcmp(argv[i], "-1")) {
onetry = 1;
} else if (!strcmp (argv [i], "-q")) {
} else if (!strcmp(argv[i], "-q")) {
quiet = 1;
} else if (!strcmp (argv [i], "-s")) {
} else if (!strcmp(argv[i], "-s")) {
if (++i == argc)
usage ();
server = argv [i];
} else if (!strcmp (argv [i], "-g")) {
usage();
server = argv[i];
} else if (!strcmp(argv[i], "-g")) {
if (++i == argc)
usage ();
mockup_relay = argv [i];
} else if (!strcmp (argv [i], "-nw")) {
usage();
mockup_relay = argv[i];
} else if (!strcmp(argv[i], "-nw")) {
nowait = 1;
} else if (!strcmp (argv [i], "-n")) {
} else if (!strcmp(argv[i], "-n")) {
/* do not start up any interfaces */
interfaces_requested = -1;
} else if (!strcmp (argv [i], "-w")) {
} else if (!strcmp(argv[i], "-w")) {
/* do not exit if there are no broadcast interfaces. */
persist = 1;
} else if (!strcmp (argv [i], "-e")) {
} else if (!strcmp(argv[i], "-e")) {
struct string_list *tmp;
if (++i == argc)
usage ();
tmp = dmalloc (strlen (argv [i]) + sizeof *tmp, MDL);
usage();
tmp = dmalloc(strlen(argv[i]) + sizeof *tmp, MDL);
if (!tmp)
log_fatal ("No memory for %s", argv [i]);
strcpy (tmp -> string, argv [i]);
tmp -> next = client_env;
log_fatal("No memory for %s", argv[i]);
strcpy(tmp->string, argv[i]);
tmp->next = client_env;
client_env = tmp;
client_env_count++;
#ifdef DHCPv6
} else if (!strcmp(argv[i], "-S")) {
if (local_family_set && (local_family == AF_INET)) {
usage ();
usage();
}
local_family_set = 1;
local_family = AF_INET6;
wanted_ia_na = 0;
stateless = 1;
} else if (!strcmp(argv[i], "-N")) {
if (local_family_set && (local_family == AF_INET)) {
usage();
}
local_family_set = 1;
local_family = AF_INET6;
if (wanted_ia_na < 0) {
wanted_ia_na = 0;
}
wanted_ia_na++;
} else if (!strcmp(argv[i], "-T")) {
if (local_family_set && (local_family == AF_INET)) {
usage();
}
local_family_set = 1;
local_family = AF_INET6;
if (wanted_ia_na < 0) {
wanted_ia_na = 0;
}
wanted_ia_ta++;
} else if (!strcmp(argv[i], "-P")) {
if (local_family_set && (local_family == AF_INET)) {
usage();
}
local_family_set = 1;
local_family = AF_INET6;
if (wanted_ia_na < 0) {
wanted_ia_na = 0;
}
wanted_ia_pd++;
#endif /* DHCPv6 */
} else if (!strcmp(argv[i], "-v")) {
quiet = 0;
} else if (!strcmp (argv [i], "--version")) {
log_info ("isc-dhclient-%s", PACKAGE_VERSION);
exit (0);
} else if (argv [i][0] == '-') {
usage ();
} else if (!strcmp(argv[i], "--version")) {
log_info("isc-dhclient-%s", PACKAGE_VERSION);
exit(0);
} else if (argv[i][0] == '-') {
usage();
} else if (interfaces_requested < 0) {
usage ();
usage();
} else {
struct interface_info *tmp = (struct interface_info *)0;
status = interface_allocate (&tmp, MDL);
struct interface_info *tmp = NULL;
status = interface_allocate(&tmp, MDL);
if (status != ISC_R_SUCCESS)
log_fatal ("Can't record interface %s:%s",
argv [i], isc_result_totext (status));
log_fatal("Can't record interface %s:%s",
argv[i], isc_result_totext(status));
if (strlen(argv[i]) >= sizeof(tmp->name))
log_fatal("%s: interface name too long (is %ld)",
argv [i], (long)strlen(argv[i]));
argv[i], (long)strlen(argv[i]));
strcpy(tmp->name, argv[i]);
if (interfaces) {
interface_reference (&tmp -> next,
interfaces, MDL);
interface_dereference (&interfaces, MDL);
interface_reference(&tmp->next,
interfaces, MDL);
interface_dereference(&interfaces, MDL);
}
interface_reference (&interfaces, tmp, MDL);
tmp -> flags = INTERFACE_REQUESTED;
interface_reference(&interfaces, tmp, MDL);
tmp->flags = INTERFACE_REQUESTED;
interfaces_requested++;
}
}
if (!no_dhclient_conf && (s = getenv ("PATH_DHCLIENT_CONF"))) {
if (wanted_ia_na < 0) {
wanted_ia_na = 1;
}
/* Support only one (requested) interface for Prefix Delegation. */
if (wanted_ia_pd && (interfaces_requested != 1)) {
usage();
}
if (!no_dhclient_conf && (s = getenv("PATH_DHCLIENT_CONF"))) {
path_dhclient_conf = s;
}
if (!no_dhclient_db && (s = getenv ("PATH_DHCLIENT_DB"))) {
if (!no_dhclient_db && (s = getenv("PATH_DHCLIENT_DB"))) {
path_dhclient_db = s;
}
if (!no_dhclient_pid && (s = getenv ("PATH_DHCLIENT_PID"))) {
if (!no_dhclient_pid && (s = getenv("PATH_DHCLIENT_PID"))) {
path_dhclient_pid = s;
}
if (!no_dhclient_script && (s = getenv ("PATH_DHCLIENT_SCRIPT"))) {
if (!no_dhclient_script && (s = getenv("PATH_DHCLIENT_SCRIPT"))) {
path_dhclient_script = s;
}
@@ -297,7 +343,7 @@ main(int argc, char **argv) {
char *path = dmalloc(PATH_MAX, MDL);
if (path == NULL)
log_fatal("No memory for filename\n");
path_dhclient_db = realpath(path_dhclient_db, path);
path_dhclient_db = realpath(path_dhclient_db, path);
if (path_dhclient_db == NULL)
log_fatal("%s: %s", path, strerror(errno));
}
@@ -306,7 +352,7 @@ main(int argc, char **argv) {
char *path = dmalloc(PATH_MAX, MDL);
if (path == NULL)
log_fatal("No memory for filename\n");
path_dhclient_script = realpath(path_dhclient_script, path);
path_dhclient_script = realpath(path_dhclient_script, path);
if (path_dhclient_script == NULL)
log_fatal("%s: %s", path, strerror(errno));
}
@@ -332,11 +378,11 @@ main(int argc, char **argv) {
}
if (!quiet) {
log_info ("%s %s", message, PACKAGE_VERSION);
log_info (copyright);
log_info (arr);
log_info (url);
log_info ("%s", "");
log_info("%s %s", message, PACKAGE_VERSION);
log_info(copyright);
log_info(arr);
log_info(url);
log_info("%s", "");
} else {
log_perror = 0;
quiet_interface_discovery = 1;
@@ -345,14 +391,14 @@ main(int argc, char **argv) {
/* If we're given a relay agent address to insert, for testing
purposes, figure out what it is. */
if (mockup_relay) {
if (!inet_aton (mockup_relay, &giaddr)) {
if (!inet_aton(mockup_relay, &giaddr)) {
struct hostent *he;
he = gethostbyname (mockup_relay);
he = gethostbyname(mockup_relay);
if (he) {
memcpy (&giaddr, he -> h_addr_list [0],
sizeof giaddr);
memcpy(&giaddr, he->h_addr_list[0],
sizeof giaddr);
} else {
log_fatal ("%s: no such host", mockup_relay);
log_fatal("%s: no such host", mockup_relay);
}
}
}
@@ -363,13 +409,13 @@ main(int argc, char **argv) {
sockaddr_broadcast.sin_family = AF_INET;
sockaddr_broadcast.sin_port = remote_port;
if (server) {
if (!inet_aton (server, &sockaddr_broadcast.sin_addr)) {
if (!inet_aton(server, &sockaddr_broadcast.sin_addr)) {
struct hostent *he;
he = gethostbyname (server);
he = gethostbyname(server);
if (he) {
memcpy (&sockaddr_broadcast.sin_addr,
he -> h_addr_list [0],
sizeof sockaddr_broadcast.sin_addr);
memcpy(&sockaddr_broadcast.sin_addr,
he->h_addr_list[0],
sizeof sockaddr_broadcast.sin_addr);
} else
sockaddr_broadcast.sin_addr.s_addr =
INADDR_BROADCAST;
@@ -382,52 +428,61 @@ main(int argc, char **argv) {
/* Stateless special case. */
if (stateless) {
if (release_mode || (interfaces_requested != 1)) {
usage ();
if (release_mode || (wanted_ia_na > 0) ||
wanted_ia_ta || wanted_ia_pd ||
(interfaces_requested != 1)) {
usage();
}
run_stateless (exit_mode);
run_stateless(exit_mode);
return 0;
}
/* Discover all the network interfaces. */
discover_interfaces (DISCOVER_UNCONFIGURED);
discover_interfaces(DISCOVER_UNCONFIGURED);
/* Parse the dhclient.conf file. */
read_client_conf ();
read_client_conf();
/* Parse the lease database. */
read_client_leases ();
read_client_leases();
/* Rewrite the lease database... */
rewrite_client_leases ();
rewrite_client_leases();
/* XXX */
/* config_counter(&snd_counter, &rcv_counter); */
/* If no broadcast interfaces were discovered, call the script
and tell it so. */
/*
* If no broadcast interfaces were discovered, call the script
* and tell it so.
*/
if (!interfaces) {
/* Call dhclient-script with the NBI flag, in case somebody
cares. */
script_init ((struct client_state *)0, "NBI",
(struct string_list *)0);
script_go ((struct client_state *)0);
/*
* Call dhclient-script with the NBI flag,
* in case somebody cares.
*/
script_init(NULL, "NBI", NULL);
script_go(NULL);
/* If we haven't been asked to persist, waiting for new
interfaces, then just exit. */
/*
* If we haven't been asked to persist, waiting for new
* interfaces, then just exit.
*/
if (!persist) {
/* Nothing more to do. */
log_info ("No broadcast interfaces found - exiting.");
exit (0);
log_info("No broadcast interfaces found - exiting.");
exit(0);
}
} else if (!release_mode && !exit_mode) {
/* Call the script with the list of interfaces. */
for (ip = interfaces; ip; ip = ip -> next) {
/* If interfaces were specified, don't configure
interfaces that weren't specified! */
for (ip = interfaces; ip; ip = ip->next) {
/*
* If interfaces were specified, don't configure
* interfaces that weren't specified!
*/
if ((interfaces_requested > 0) &&
((ip -> flags & (INTERFACE_REQUESTED |
INTERFACE_AUTOMATIC)) !=
((ip->flags & (INTERFACE_REQUESTED |
INTERFACE_AUTOMATIC)) !=
INTERFACE_REQUESTED))
continue;
@@ -440,7 +495,7 @@ main(int argc, char **argv) {
"alias_",
ip->client->alias);
}
script_go (ip->client);
script_go(ip->client);
}
}
@@ -448,9 +503,9 @@ main(int argc, char **argv) {
are relevant should be running, so now we once again call
discover_interfaces(), and this time ask it to actually set
up the interfaces. */
discover_interfaces (interfaces_requested != 0
? DISCOVER_REQUESTED
: DISCOVER_RUNNING);
discover_interfaces(interfaces_requested != 0
? DISCOVER_REQUESTED
: DISCOVER_RUNNING);
/* Make up a seed for the random number generator from current
time plus the sum of the last four bytes of each
@@ -458,14 +513,14 @@ main(int argc, char **argv) {
Not much entropy, but we're booting, so we're not likely to
find anything better. */
seed = 0;
for (ip = interfaces; ip; ip = ip -> next) {
for (ip = interfaces; ip; ip = ip->next) {
int junk;
memcpy (&junk,
&ip -> hw_address.hbuf [ip -> hw_address.hlen -
sizeof seed], sizeof seed);
memcpy(&junk,
&ip->hw_address.hbuf[ip->hw_address.hlen -
sizeof seed], sizeof seed);
seed += junk;
}
srandom (seed + cur_time);
srandom(seed + cur_time);
/* Start a configuration state machine for each interface. */
#ifdef DHCPv6
@@ -543,18 +598,18 @@ main(int argc, char **argv) {
/* Start up a listener for the object management API protocol. */
if (top_level_config.omapi_port != -1) {
listener = (omapi_object_t *)0;
result = omapi_generic_new (&listener, MDL);
listener = NULL;
result = omapi_generic_new(&listener, MDL);
if (result != ISC_R_SUCCESS)
log_fatal ("Can't allocate new generic object: %s\n",
isc_result_totext (result));
result = omapi_protocol_listen (listener,
(unsigned)
top_level_config.omapi_port,
1);
log_fatal("Can't allocate new generic object: %s\n",
isc_result_totext(result));
result = omapi_protocol_listen(listener,
(unsigned)
top_level_config.omapi_port,
1);
if (result != ISC_R_SUCCESS)
log_fatal ("Can't start OMAPI protocol: %s",
isc_result_totext (result));
log_fatal("Can't start OMAPI protocol: %s",
isc_result_totext (result));
}
/* Set up the bootp packet handler... */
@@ -563,8 +618,8 @@ main(int argc, char **argv) {
dhcpv6_packet_handler = do_packet6;
#endif /* DHCPv6 */
#if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL) || \
defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
#if defined(DEBUG_MEMORY_LEAKAGE) || defined(DEBUG_MALLOC_POOL) || \
defined(DEBUG_MEMORY_LEAKAGE_ON_EXIT)
dmalloc_cutoff_generation = dmalloc_generation;
dmalloc_longterm = dmalloc_outstanding;
dmalloc_outstanding = 0;
@@ -573,41 +628,42 @@ main(int argc, char **argv) {
/* If we're not supposed to wait before getting the address,
don't. */
if (nowait)
go_daemon ();
go_daemon();
/* If we're not going to daemonize, write the pid file
now. */
if (no_daemon || nowait)
write_client_pid_file ();
write_client_pid_file();
/* Start dispatching packets and timeouts... */
dispatch ();
dispatch();
/*NOTREACHED*/
return 0;
}
static void usage ()
static void usage()
{
log_info ("%s %s", message, PACKAGE_VERSION);
log_info (copyright);
log_info (arr);
log_info (url);
log_info("%s %s", message, PACKAGE_VERSION);
log_info(copyright);
log_info(arr);
log_info(url);
log_error ("Usage: dhclient %s %s",
log_error("Usage: dhclient %s %s",
#ifdef DHCPv6
"[-4|-6] [-S1dvrx] [-nw] [-p <port>]",
"[-4|-6] [-SNTP1dvrx] [-nw] [-p <port>]",
#else /* DHCPv6 */
"[-1dvrx] [-nw] [-p <port>]",
"[-1dvrx] [-nw] [-p <port>]",
#endif /* DHCPv6 */
"[-s server]");
log_error (" [-cf config-file] [-lf lease-file]%s",
"[-pf pid-file] [-e VAR=val]");
log_fatal (" [-sf script-file] [interface]");
"[-s server]");
log_error(" [-cf config-file] [-lf lease-file]%s",
"[-pf pid-file] [-e VAR=val]");
log_fatal(" [-sf script-file] [interface]");
}
void run_stateless(int exit_mode)
{
#ifdef DHCPv6
struct client_state *client;
omapi_object_t *listener;
isc_result_t result;
@@ -647,7 +703,7 @@ void run_stateless(int exit_mode)
/* Start up a listener for the object management API protocol. */
if (top_level_config.omapi_port != -1) {
listener = (omapi_object_t *)0;
listener = NULL;
result = omapi_generic_new(&listener, MDL);
if (result != ISC_R_SUCCESS)
log_fatal("Can't allocate new generic object: %s\n",
@@ -664,8 +720,8 @@ void run_stateless(int exit_mode)
/* Set up the packet handler... */
dhcpv6_packet_handler = do_packet6;
#if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL) || \
defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
#if defined(DEBUG_MEMORY_LEAKAGE) || defined(DEBUG_MALLOC_POOL) || \
defined(DEBUG_MEMORY_LEAKAGE_ON_EXIT)
dmalloc_cutoff_generation = dmalloc_generation;
dmalloc_longterm = dmalloc_outstanding;
dmalloc_outstanding = 0;
@@ -685,6 +741,7 @@ void run_stateless(int exit_mode)
dispatch();
/*NOTREACHED*/
#endif /* DHCPv6 */
return;
}
@@ -766,20 +823,24 @@ void state_reboot (cpp)
/* We are in the rebooting state. */
client -> state = S_REBOOTING;
/* make_request doesn't initialize xid because it normally comes
from the DHCPDISCOVER, but we haven't sent a DHCPDISCOVER,
so pick an xid now. */
/*
* make_request doesn't initialize xid because it normally comes
* from the DHCPDISCOVER, but we haven't sent a DHCPDISCOVER,
* so pick an xid now.
*/
client -> xid = random ();
/* Make a DHCPREQUEST packet, and set appropriate per-interface
flags. */
/*
* Make a DHCPREQUEST packet, and set
* appropriate per-interface flags.
*/
make_request (client, client -> active);
client -> destination = iaddr_broadcast;
client -> first_sending = cur_time;
client -> interval = client -> config -> initial_interval;
/* Zap the medium list... */
client -> medium = (struct string_list *)0;
client -> medium = NULL;
/* Send out the first DHCPREQUEST packet. */
send_request (client);
@@ -809,8 +870,10 @@ void state_init (cpp)
send_discover (client);
}
/* state_selecting is called when one or more DHCPOFFER packets have been
received and a configurable period of time has passed. */
/*
* state_selecting is called when one or more DHCPOFFER packets have been
* received and a configurable period of time has passed.
*/
void state_selecting (cpp)
void *cpp;
@@ -821,31 +884,39 @@ void state_selecting (cpp)
ASSERT_STATE(state, S_SELECTING);
/* Cancel state_selecting and send_discover timeouts, since either
one could have got us here. */
/*
* Cancel state_selecting and send_discover timeouts, since either
* one could have got us here.
*/
cancel_timeout (state_selecting, client);
cancel_timeout (send_discover, client);
/* We have received one or more DHCPOFFER packets. Currently,
the only criterion by which we judge leases is whether or
not we get a response when we arp for them. */
picked = (struct client_lease *)0;
/*
* We have received one or more DHCPOFFER packets. Currently,
* the only criterion by which we judge leases is whether or
* not we get a response when we arp for them.
*/
picked = NULL;
for (lp = client -> offered_leases; lp; lp = next) {
next = lp -> next;
/* Check to see if we got an ARPREPLY for the address
in this particular lease. */
/*
* Check to see if we got an ARPREPLY for the address
* in this particular lease.
*/
if (!picked) {
picked = lp;
picked -> next = (struct client_lease *)0;
picked -> next = NULL;
} else {
destroy_client_lease (lp);
}
}
client -> offered_leases = (struct client_lease *)0;
client -> offered_leases = NULL;
/* If we just tossed all the leases we were offered, go back
to square one. */
/*
* If we just tossed all the leases we were offered, go back
* to square one.
*/
if (!picked) {
client -> state = S_INIT;
state_init (client);