udhcp: new config option "Rewrite the lease file at every new acknowledge"
(Mats Erik Andersson <mats@blue2net.com> (Blue2Net AB))
udhcp: consistently treat server_config.start/end IPs as host-order
fix IP parsing for 64bit machines
fix unsafe hton macro usage in read_opt()
do not chdir("/") when daemonizing
fix help text
This commit is contained in:
Denis Vlasenko
parent
dc7a5eae36
commit
c82b5108e1
@ -3575,7 +3575,8 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
|
||||
"Adjust filesystem options on ext[23] filesystems"
|
||||
|
||||
#define udhcpc_trivial_usage \
|
||||
"[-Cfbnqtv] [-c CID] [-V VCLS] [-H HOSTNAME] [-i INTERFACE]\n[-p pidfile] [-r IP] [-s script]"
|
||||
"[-Cfbnqtv] [-c CID] [-V VCLS] [-H HOSTNAME] [-i INTERFACE]\n" \
|
||||
" [-p pidfile] [-r IP] [-s script]"
|
||||
#define udhcpc_full_usage \
|
||||
" -V,--vendorclass=CLASSID Set vendor class identifier\n" \
|
||||
" -i,--interface=INTERFACE Interface to use (default: eth0)\n" \
|
||||
@ -3594,7 +3595,7 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
|
||||
" -v,--version Display version" \
|
||||
|
||||
#define udhcpd_trivial_usage \
|
||||
"[configfile]\n" \
|
||||
"[configfile]" \
|
||||
|
||||
#define udhcpd_full_usage \
|
||||
""
|
||||
|
||||
@ -32,6 +32,16 @@ config APP_DUMPLEASES
|
||||
|
||||
See http://udhcp.busybox.net for further details.
|
||||
|
||||
config FEATURE_UDHCPD_WRITE_LEASES_EARLY
|
||||
bool "Rewrite the lease file at every new acknowledge"
|
||||
default n
|
||||
depends on APP_UDHCPD
|
||||
help
|
||||
If selected, udhcpd will write a new file with leases every
|
||||
time a new lease has been accepted, thus eleminating the need
|
||||
to send SIGUSR1 for the initial writing, or updating. Any timed
|
||||
rewriting remains undisturbed
|
||||
|
||||
config APP_UDHCPC
|
||||
bool "udhcp Client (udhcpc)"
|
||||
default n
|
||||
|
||||
@ -114,8 +114,7 @@ static void client_background(void)
|
||||
* If that will be properly disabled for NOMMU, client_background()
|
||||
* will work on NOMMU too */
|
||||
#else
|
||||
// chdir(/) is problematic. Imagine that e.g. pidfile name is RELATIVE! what will unlink do then, eh?
|
||||
bb_daemonize(DAEMON_CHDIR_ROOT);
|
||||
bb_daemonize(0);
|
||||
/* rewrite pidfile, as our pid is different now */
|
||||
if (client_config.pidfile)
|
||||
write_pidfile(client_config.pidfile);
|
||||
|
||||
@ -17,12 +17,12 @@ struct client_config_t {
|
||||
/* (can be set directly to the result of getopt32) */
|
||||
char foreground; /* Do not fork */
|
||||
char quit_after_lease; /* Quit after obtaining lease */
|
||||
char release_on_quit; /* perform release on quit */
|
||||
char release_on_quit; /* Perform release on quit */
|
||||
char abort_if_no_lease; /* Abort if no lease */
|
||||
char background_if_no_lease; /* Fork to background if no lease */
|
||||
const char *interface; /* The name of the interface to use */
|
||||
const char *interface; /* The name of the interface to use */
|
||||
char *pidfile; /* Optionally store the process ID */
|
||||
const char *script; /* User script to run at dhcp events */
|
||||
const char *script; /* User script to run at dhcp events */
|
||||
uint8_t *clientid; /* Optional client id to use */
|
||||
uint8_t *vendorclass; /* Optional vendor class-id to use */
|
||||
uint8_t *hostname; /* Optional hostname to use */
|
||||
|
||||
@ -37,7 +37,7 @@ int udhcpd_main(int argc, char **argv)
|
||||
//Huh, dhcpd don't have --foreground, --syslog options?? TODO
|
||||
|
||||
if (!ENABLE_FEATURE_UDHCP_DEBUG) {
|
||||
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
|
||||
bb_daemonize_or_rexec(0, argv);
|
||||
logmode &= ~LOGMODE_STDIO;
|
||||
}
|
||||
|
||||
@ -60,15 +60,15 @@ int udhcpd_main(int argc, char **argv)
|
||||
}
|
||||
|
||||
/* Sanity check */
|
||||
num_ips = ntohl(server_config.end) - ntohl(server_config.start) + 1;
|
||||
num_ips = server_config.end_ip - server_config.start_ip + 1;
|
||||
if (server_config.max_leases > num_ips) {
|
||||
bb_error_msg("max_leases value (%lu) not sane, "
|
||||
"setting to %lu instead",
|
||||
bb_error_msg("max_leases=%lu is too big, "
|
||||
"setting to %lu",
|
||||
server_config.max_leases, num_ips);
|
||||
server_config.max_leases = num_ips;
|
||||
}
|
||||
|
||||
leases = xzalloc(server_config.max_leases * sizeof(struct dhcpOfferedAddr));
|
||||
leases = xzalloc(server_config.max_leases * sizeof(*leases));
|
||||
read_leases(server_config.lease_file);
|
||||
|
||||
if (read_interface(server_config.interface, &server_config.ifindex,
|
||||
@ -207,10 +207,13 @@ int udhcpd_main(int argc, char **argv)
|
||||
/* make some contention for this address */
|
||||
} else
|
||||
sendNAK(&packet);
|
||||
} else if (requested_align < server_config.start
|
||||
|| requested_align > server_config.end
|
||||
) {
|
||||
sendNAK(&packet);
|
||||
} else {
|
||||
uint32_t r = ntohl(requested_align);
|
||||
if (r < server_config.start_ip
|
||||
|| r > server_config.end_ip
|
||||
) {
|
||||
sendNAK(&packet);
|
||||
}
|
||||
} /* else remain silent */
|
||||
|
||||
} else {
|
||||
|
||||
@ -27,23 +27,24 @@ struct static_lease {
|
||||
|
||||
struct server_config_t {
|
||||
uint32_t server; /* Our IP, in network order */
|
||||
uint32_t start; /* Start address of leases, network order */
|
||||
uint32_t end; /* End of leases, network order */
|
||||
/* start,end are in host order: we need to compare start <= ip <= end */
|
||||
uint32_t start_ip; /* Start address of leases, in host order */
|
||||
uint32_t end_ip; /* End of leases, in host order */
|
||||
struct option_set *options; /* List of DHCP options loaded from the config file */
|
||||
char *interface; /* The name of the interface to use */
|
||||
int ifindex; /* Index number of the interface to use */
|
||||
uint8_t arp[6]; /* Our arp address */
|
||||
unsigned long lease; /* lease time in seconds (host order) */
|
||||
unsigned long max_leases; /* maximum number of leases (including reserved address) */
|
||||
char remaining; /* should the lease file be interpreted as lease time remaining, or
|
||||
* as the time the lease expires */
|
||||
unsigned long lease; /* lease time in seconds (host order) */
|
||||
unsigned long max_leases; /* maximum number of leases (including reserved address) */
|
||||
unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
|
||||
* if this is zero, it will only write one on SIGUSR1 */
|
||||
unsigned long decline_time; /* how long an address is reserved if a client returns a
|
||||
* decline message */
|
||||
unsigned long conflict_time; /* how long an arp conflict offender is leased for */
|
||||
unsigned long offer_time; /* how long an offered address is reserved */
|
||||
unsigned long min_lease; /* minimum lease a client can request*/
|
||||
unsigned long min_lease; /* minimum lease a client can request */
|
||||
char *lease_file;
|
||||
char *pidfile;
|
||||
char *notify_file; /* What to run whenever leases are written */
|
||||
@ -95,13 +96,6 @@ int send_inform(struct dhcpMessage *oldpacket);
|
||||
|
||||
/*** files.h ***/
|
||||
|
||||
struct config_keyword {
|
||||
const char *keyword;
|
||||
int (* const handler)(const char *line, void *var);
|
||||
void *var;
|
||||
const char *def;
|
||||
};
|
||||
|
||||
int read_config(const char *file);
|
||||
void write_leases(void);
|
||||
void read_leases(const char *file);
|
||||
|
||||
@ -11,42 +11,30 @@
|
||||
#include "options.h"
|
||||
|
||||
|
||||
/*
|
||||
* Domain names may have 254 chars, and string options can be 254
|
||||
* chars long. However, 80 bytes will be enough for most, and won't
|
||||
* hog up memory. If you have a special application, change it
|
||||
*/
|
||||
#define READ_CONFIG_BUF_SIZE 80
|
||||
|
||||
/* on these functions, make sure you datatype matches */
|
||||
/* on these functions, make sure your datatype matches */
|
||||
static int read_ip(const char *line, void *arg)
|
||||
{
|
||||
len_and_sockaddr *lsa;
|
||||
int retval = 0;
|
||||
|
||||
lsa = host_and_af2sockaddr(line, 0, AF_INET);
|
||||
if (lsa) {
|
||||
*(struct in_addr*)arg = lsa->sin.sin_addr;
|
||||
*(uint32_t*)arg = lsa->sin.sin_addr.s_addr;
|
||||
free(lsa);
|
||||
retval = 1;
|
||||
return 1;
|
||||
}
|
||||
return retval;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int read_mac(const char *line, void *arg)
|
||||
{
|
||||
uint8_t *mac_bytes = arg;
|
||||
struct ether_addr *temp_ether_addr;
|
||||
int retval = 1;
|
||||
|
||||
temp_ether_addr = ether_aton(line);
|
||||
|
||||
if (temp_ether_addr == NULL)
|
||||
retval = 0;
|
||||
else
|
||||
memcpy(mac_bytes, temp_ether_addr, 6);
|
||||
|
||||
return retval;
|
||||
return 0;
|
||||
memcpy(mac_bytes, temp_ether_addr, 6);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
@ -56,14 +44,13 @@ static int read_str(const char *line, void *arg)
|
||||
|
||||
free(*dest);
|
||||
*dest = xstrdup(line);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int read_u32(const char *line, void *arg)
|
||||
{
|
||||
*((uint32_t*)arg) = bb_strtou32(line, NULL, 10);
|
||||
*(uint32_t*)arg = bb_strtou32(line, NULL, 10);
|
||||
return errno == 0;
|
||||
}
|
||||
|
||||
@ -71,15 +58,16 @@ static int read_u32(const char *line, void *arg)
|
||||
static int read_yn(const char *line, void *arg)
|
||||
{
|
||||
char *dest = arg;
|
||||
int retval = 1;
|
||||
|
||||
if (!strcasecmp("yes", line))
|
||||
if (!strcasecmp("yes", line)) {
|
||||
*dest = 1;
|
||||
else if (!strcasecmp("no", line))
|
||||
return 1;
|
||||
}
|
||||
if (!strcasecmp("no", line)) {
|
||||
*dest = 0;
|
||||
else retval = 0;
|
||||
|
||||
return retval;
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
@ -89,8 +77,9 @@ struct option_set *find_option(struct option_set *opt_list, char code)
|
||||
while (opt_list && opt_list->data[OPT_CODE] < code)
|
||||
opt_list = opt_list->next;
|
||||
|
||||
if (opt_list && opt_list->data[OPT_CODE] == code) return opt_list;
|
||||
else return NULL;
|
||||
if (opt_list && opt_list->data[OPT_CODE] == code)
|
||||
return opt_list;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
@ -111,7 +100,7 @@ static void attach_option(struct option_set **opt_list,
|
||||
#endif
|
||||
|
||||
/* make a new option */
|
||||
new = xmalloc(sizeof(struct option_set));
|
||||
new = xmalloc(sizeof(*new));
|
||||
new->data = xmalloc(length + 2);
|
||||
new->data[OPT_CODE] = option->code;
|
||||
new->data[OPT_LEN] = length;
|
||||
@ -184,7 +173,7 @@ static int read_opt(const char *const_line, void *arg)
|
||||
return 0;
|
||||
if (!strcasecmp(option->name, opt))
|
||||
break;
|
||||
option++;
|
||||
option++;
|
||||
}
|
||||
|
||||
do {
|
||||
@ -199,8 +188,11 @@ static int read_opt(const char *const_line, void *arg)
|
||||
break;
|
||||
case OPTION_IP_PAIR:
|
||||
retval = read_ip(val, buffer);
|
||||
if (!(val = strtok(NULL, ", \t/-"))) retval = 0;
|
||||
if (retval) retval = read_ip(val, buffer + 4);
|
||||
val = strtok(NULL, ", \t/-");
|
||||
if (!val)
|
||||
retval = 0;
|
||||
if (retval)
|
||||
retval = read_ip(val, buffer + 4);
|
||||
break;
|
||||
case OPTION_STRING:
|
||||
#if ENABLE_FEATURE_RFC3397
|
||||
@ -220,22 +212,33 @@ static int read_opt(const char *const_line, void *arg)
|
||||
buffer[0] = strtoul(val, &endptr, 0);
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_U16:
|
||||
*result_u16 = htons(strtoul(val, &endptr, 0));
|
||||
/* htonX are macros in older libc's, using temp var
|
||||
* in code below for safety */
|
||||
/* TODO: use bb_strtoX? */
|
||||
case OPTION_U16: {
|
||||
unsigned long tmp = strtoul(val, &endptr, 0);
|
||||
*result_u16 = htons(tmp);
|
||||
retval = (endptr[0] == '\0' /*&& tmp < 0x10000*/);
|
||||
break;
|
||||
}
|
||||
case OPTION_S16: {
|
||||
long tmp = strtol(val, &endptr, 0);
|
||||
*result_u16 = htons(tmp);
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_S16:
|
||||
*result_u16 = htons(strtol(val, &endptr, 0));
|
||||
}
|
||||
case OPTION_U32: {
|
||||
unsigned long tmp = strtoul(val, &endptr, 0);
|
||||
*result_u32 = htonl(tmp);
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_U32:
|
||||
*result_u32 = htonl(strtoul(val, &endptr, 0));
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_S32:
|
||||
*result_u32 = htonl(strtol(val, &endptr, 0));
|
||||
}
|
||||
case OPTION_S32: {
|
||||
long tmp = strtol(val, &endptr, 0);
|
||||
*result_u32 = htonl(tmp);
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
@ -253,7 +256,6 @@ static int read_staticlease(const char *const_line, void *arg)
|
||||
uint8_t *mac_bytes;
|
||||
uint32_t *ip;
|
||||
|
||||
|
||||
/* Allocate memory for addresses */
|
||||
mac_bytes = xmalloc(sizeof(unsigned char) * 8);
|
||||
ip = xmalloc(sizeof(uint32_t));
|
||||
@ -275,31 +277,46 @@ static int read_staticlease(const char *const_line, void *arg)
|
||||
}
|
||||
|
||||
|
||||
static const struct config_keyword keywords[] = {
|
||||
/* keyword handler variable address default */
|
||||
{"start", read_ip, &(server_config.start), "192.168.0.20"},
|
||||
{"end", read_ip, &(server_config.end), "192.168.0.254"},
|
||||
{"interface", read_str, &(server_config.interface), "eth0"},
|
||||
{"option", read_opt, &(server_config.options), ""},
|
||||
{"opt", read_opt, &(server_config.options), ""},
|
||||
{"max_leases", read_u32, &(server_config.max_leases), "254"},
|
||||
{"remaining", read_yn, &(server_config.remaining), "yes"},
|
||||
{"auto_time", read_u32, &(server_config.auto_time), "7200"},
|
||||
{"decline_time",read_u32, &(server_config.decline_time),"3600"},
|
||||
{"conflict_time",read_u32,&(server_config.conflict_time),"3600"},
|
||||
{"offer_time", read_u32, &(server_config.offer_time), "60"},
|
||||
{"min_lease", read_u32, &(server_config.min_lease), "60"},
|
||||
{"lease_file", read_str, &(server_config.lease_file), LEASES_FILE},
|
||||
{"pidfile", read_str, &(server_config.pidfile), "/var/run/udhcpd.pid"},
|
||||
{"notify_file", read_str, &(server_config.notify_file), ""},
|
||||
{"siaddr", read_ip, &(server_config.siaddr), "0.0.0.0"},
|
||||
{"sname", read_str, &(server_config.sname), ""},
|
||||
{"boot_file", read_str, &(server_config.boot_file), ""},
|
||||
{"static_lease",read_staticlease, &(server_config.static_leases), ""},
|
||||
/*ADDME: static lease */
|
||||
{"", NULL, NULL, ""}
|
||||
struct config_keyword {
|
||||
const char *keyword;
|
||||
int (*handler)(const char *line, void *var);
|
||||
void *var;
|
||||
const char *def;
|
||||
};
|
||||
|
||||
static const struct config_keyword keywords[] = {
|
||||
/* keyword handler variable address default */
|
||||
{"start", read_ip, &(server_config.start_ip), "192.168.0.20"},
|
||||
{"end", read_ip, &(server_config.end_ip), "192.168.0.254"},
|
||||
{"interface", read_str, &(server_config.interface), "eth0"},
|
||||
{"option", read_opt, &(server_config.options), ""},
|
||||
{"opt", read_opt, &(server_config.options), ""},
|
||||
/* Avoid "max_leases value not sane" warning by setting default
|
||||
* to default_end_ip - default_start_ip + 1: */
|
||||
{"max_leases", read_u32, &(server_config.max_leases), "235"},
|
||||
{"remaining", read_yn, &(server_config.remaining), "yes"},
|
||||
{"auto_time", read_u32, &(server_config.auto_time), "7200"},
|
||||
{"decline_time", read_u32, &(server_config.decline_time), "3600"},
|
||||
{"conflict_time",read_u32, &(server_config.conflict_time),"3600"},
|
||||
{"offer_time", read_u32, &(server_config.offer_time), "60"},
|
||||
{"min_lease", read_u32, &(server_config.min_lease), "60"},
|
||||
{"lease_file", read_str, &(server_config.lease_file), LEASES_FILE},
|
||||
{"pidfile", read_str, &(server_config.pidfile), "/var/run/udhcpd.pid"},
|
||||
{"notify_file", read_str, &(server_config.notify_file), ""},
|
||||
{"siaddr", read_ip, &(server_config.siaddr), "0.0.0.0"},
|
||||
{"sname", read_str, &(server_config.sname), ""},
|
||||
{"boot_file", read_str, &(server_config.boot_file), ""},
|
||||
{"static_lease", read_staticlease, &(server_config.static_leases), ""},
|
||||
/* ADDME: static lease */
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* Domain names may have 254 chars, and string options can be 254
|
||||
* chars long. However, 80 bytes will be enough for most, and won't
|
||||
* hog up memory. If you have a special application, change it
|
||||
*/
|
||||
#define READ_CONFIG_BUF_SIZE 80
|
||||
|
||||
int read_config(const char *file)
|
||||
{
|
||||
@ -307,7 +324,7 @@ int read_config(const char *file)
|
||||
char buffer[READ_CONFIG_BUF_SIZE], *token, *line;
|
||||
int i, lm = 0;
|
||||
|
||||
for (i = 0; keywords[i].keyword[0]; i++)
|
||||
for (i = 0; i < ARRAY_SIZE(keywords); i++)
|
||||
if (keywords[i].def[0])
|
||||
keywords[i].handler(keywords[i].def, keywords[i].var);
|
||||
|
||||
@ -337,7 +354,7 @@ int read_config(const char *file)
|
||||
while (i >= 0 && isspace(line[i]))
|
||||
line[i--] = '\0';
|
||||
|
||||
for (i = 0; keywords[i].keyword[0]; i++)
|
||||
for (i = 0; i < ARRAY_SIZE(keywords); i++)
|
||||
if (!strcasecmp(token, keywords[i].keyword))
|
||||
if (!keywords[i].handler(line, keywords[i].var)) {
|
||||
bb_error_msg("cannot parse line %d of %s", lm, file);
|
||||
@ -348,6 +365,10 @@ int read_config(const char *file)
|
||||
}
|
||||
}
|
||||
fclose(in);
|
||||
|
||||
server_config.start_ip = ntohl(server_config.start_ip);
|
||||
server_config.end_ip = ntohl(server_config.end_ip);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
@ -408,9 +429,11 @@ void read_leases(const char *file)
|
||||
&& full_read(fp, &lease, sizeof(lease)) == sizeof(lease)
|
||||
) {
|
||||
/* ADDME: is it a static lease */
|
||||
if (lease.yiaddr >= server_config.start && lease.yiaddr <= server_config.end) {
|
||||
uint32_t y = ntohl(lease.yiaddr);
|
||||
if (y >= server_config.start_ip && y <= server_config.end_ip) {
|
||||
lease.expires = ntohl(lease.expires);
|
||||
if (!server_config.remaining) lease.expires -= time(0);
|
||||
if (!server_config.remaining)
|
||||
lease.expires -= time(0);
|
||||
if (!(add_lease(lease.chaddr, lease.yiaddr, lease.expires))) {
|
||||
bb_error_msg("too many leases while loading %s", file);
|
||||
break;
|
||||
|
||||
@ -119,8 +119,8 @@ uint32_t find_address(int check_expired)
|
||||
uint32_t addr, ret;
|
||||
struct dhcpOfferedAddr *lease = NULL;
|
||||
|
||||
addr = ntohl(server_config.start); /* addr is in host order here */
|
||||
for (;addr <= ntohl(server_config.end); addr++) {
|
||||
addr = server_config.start_ip; /* addr is in host order here */
|
||||
for (;addr <= server_config.end_ip; addr++) {
|
||||
|
||||
/* ie, 192.168.55.0 */
|
||||
if (!(addr & 0xFF)) continue;
|
||||
|
||||
@ -122,19 +122,18 @@ int sendOffer(struct dhcpMessage *oldpacket)
|
||||
if (!lease_expired(lease))
|
||||
lease_time_align = lease->expires - time(0);
|
||||
packet.yiaddr = lease->yiaddr;
|
||||
|
||||
/* Or the client has a requested ip */
|
||||
} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP))
|
||||
/* Don't look here (ugly hackish thing to do) */
|
||||
&& memcpy(&req_align, req, 4)
|
||||
/* and the ip is in the lease range */
|
||||
&& ntohl(req_align) >= ntohl(server_config.start)
|
||||
&& ntohl(req_align) <= ntohl(server_config.end)
|
||||
&& !static_lease_ip /* Check that its not a static lease */
|
||||
/* and is not already taken/offered */
|
||||
&& (!(lease = find_lease_by_yiaddr(req_align))
|
||||
/* or its taken, but expired */ /* ADDME: or maybe in here */
|
||||
|| lease_expired(lease))
|
||||
/* Don't look here (ugly hackish thing to do) */
|
||||
&& memcpy(&req_align, req, 4)
|
||||
/* and the ip is in the lease range */
|
||||
&& ntohl(req_align) >= server_config.start_ip
|
||||
&& ntohl(req_align) <= server_config.end_ip
|
||||
&& !static_lease_ip /* Check that its not a static lease */
|
||||
/* and is not already taken/offered */
|
||||
&& (!(lease = find_lease_by_yiaddr(req_align))
|
||||
/* or its taken, but expired */ /* ADDME: or maybe in here */
|
||||
|| lease_expired(lease))
|
||||
) {
|
||||
packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
|
||||
/* otherwise, find a free IP */
|
||||
@ -142,7 +141,8 @@ int sendOffer(struct dhcpMessage *oldpacket)
|
||||
/* Is it a static lease? (No, because find_address skips static lease) */
|
||||
packet.yiaddr = find_address(0);
|
||||
/* try for an expired lease */
|
||||
if (!packet.yiaddr) packet.yiaddr = find_address(1);
|
||||
if (!packet.yiaddr)
|
||||
packet.yiaddr = find_address(1);
|
||||
}
|
||||
|
||||
if (!packet.yiaddr) {
|
||||
@ -209,7 +209,8 @@ int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr)
|
||||
init_packet(&packet, oldpacket, DHCPACK);
|
||||
packet.yiaddr = yiaddr;
|
||||
|
||||
if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
|
||||
lease_time = get_option(oldpacket, DHCP_LEASE_TIME);
|
||||
if (lease_time) {
|
||||
memcpy(&lease_time_align, lease_time, 4);
|
||||
lease_time_align = ntohl(lease_time_align);
|
||||
if (lease_time_align > server_config.lease)
|
||||
@ -236,6 +237,10 @@ int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr)
|
||||
return -1;
|
||||
|
||||
add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
|
||||
if (ENABLE_FEATURE_UDHCPD_WRITE_LEASES_EARLY) {
|
||||
/* rewrite the file with leases at every new acceptance */
|
||||
write_leases();
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -43,7 +43,7 @@ int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t
|
||||
struct ifreq ifr;
|
||||
struct sockaddr_in *our_ip;
|
||||
|
||||
memset(&ifr, 0, sizeof(struct ifreq));
|
||||
memset(&ifr, 0, sizeof(ifr));
|
||||
fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
|
||||
if (fd < 0) {
|
||||
bb_perror_msg("socket failed");
|
||||
@ -54,7 +54,8 @@ int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t
|
||||
strncpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
|
||||
if (addr) {
|
||||
if (ioctl(fd, SIOCGIFADDR, &ifr) != 0) {
|
||||
bb_perror_msg("SIOCGIFADDR failed, is the interface up and configured?");
|
||||
bb_perror_msg("SIOCGIFADDR failed (is interface %s "
|
||||
"up and configured?)", interface);
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
@ -117,7 +118,7 @@ int listen_socket(uint32_t ip, int port, const char *inf)
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) {
|
||||
if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user