rt_names: stop allocating 5k in rwdata

[oweals/busybox.git] / networking / udhcp / leases.c

diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
index dce0566541d8176814d32506f0cc2a46f96ba4f9..2f7847d74f52b89414856c8e92e8112cd9dd3e4e 100644 (file)
--- a/networking/udhcp/leases.c
+++ b/networking/udhcp/leases.c
@@ -1,20 +1,11 @@
-/* 
- * leases.c -- tools to manage DHCP leases 
+/* vi: set sw=4 ts=4: */
+/*
+ * leases.c -- tools to manage DHCP leases
  * Russ Dill <Russ.Dill@asu.edu> July 2001
  */
 
-#include <time.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-#include "dhcpd.h"
-#include "files.h"
-#include "options.h"
-#include "leases.h"
-#include "arpping.h"
 #include "common.h"
+#include "dhcpd.h"
 
 
 uint8_t blank_chaddr[] = {[0 ... 15] = 0};
@@ -23,9 +14,9 @@ uint8_t blank_chaddr[] = {[0 ... 15] = 0};
 void clear_lease(uint8_t *chaddr, uint32_t yiaddr)
 {
        unsigned int i, j;
-       
+
        for (j = 0; j < 16 && !chaddr[j]; j++);
-       
+
        for (i = 0; i < server_config.max_leases; i++)
                if ((j != 16 && !memcmp(leases[i].chaddr, chaddr, 16)) ||
                    (yiaddr && leases[i].yiaddr == yiaddr)) {
@@ -38,18 +29,18 @@ void clear_lease(uint8_t *chaddr, uint32_t yiaddr)
 struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned long lease)
 {
        struct dhcpOfferedAddr *oldest;
-       
+
        /* clean out any old ones */
        clear_lease(chaddr, yiaddr);
-               
+
        oldest = oldest_expired_lease();
-       
+
        if (oldest) {
                memcpy(oldest->chaddr, chaddr, 16);
                oldest->yiaddr = yiaddr;
                oldest->expires = time(0) + lease;
        }
-       
+
        return oldest;
 }
 
@@ -58,7 +49,7 @@ struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned lon
 int lease_expired(struct dhcpOfferedAddr *lease)
 {
        return (lease->expires < (unsigned long) time(0));
-}      
+}
 
 
 /* Find the oldest expired lease, NULL if there are no expired leases */
@@ -68,14 +59,14 @@ struct dhcpOfferedAddr *oldest_expired_lease(void)
        unsigned long oldest_lease = time(0);
        unsigned int i;
 
-       
+
        for (i = 0; i < server_config.max_leases; i++)
                if (oldest_lease > leases[i].expires) {
                        oldest_lease = leases[i].expires;
                        oldest = &(leases[i]);
                }
        return oldest;
-               
+
 }
 
 
@@ -86,7 +77,7 @@ struct dhcpOfferedAddr *find_lease_by_chaddr(uint8_t *chaddr)
 
        for (i = 0; i < server_config.max_leases; i++)
                if (!memcmp(leases[i].chaddr, chaddr, 16)) return &(leases[i]);
-       
+
        return NULL;
 }
 
@@ -98,7 +89,7 @@ struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr)
 
        for (i = 0; i < server_config.max_leases; i++)
                if (leases[i].yiaddr == yiaddr) return &(leases[i]);
-       
+
        return NULL;
 }
 
@@ -110,7 +101,7 @@ static int check_ip(uint32_t addr)
 
        if (arpping(addr, server_config.server, server_config.arp, server_config.interface) == 0) {
                temp.s_addr = addr;
-               LOG(LOG_INFO, "%s belongs to someone, reserving it for %ld seconds",
+               bb_info_msg("%s belongs to someone, reserving it for %ld seconds",
                        inet_ntoa(temp), server_config.conflict_time);
                add_lease(blank_chaddr, addr, server_config.conflict_time);
                return 1;
@@ -120,10 +111,10 @@ static int check_ip(uint32_t addr)
 
 /* find an assignable address, it check_expired is true, we check all the expired leases as well.
  * Maybe this should try expired leases by age... */
-uint32_t find_address(int check_expired) 
+uint32_t find_address(int check_expired)
 {
        uint32_t addr, ret;
-       struct dhcpOfferedAddr *lease = NULL;           
+       struct dhcpOfferedAddr *lease = NULL;
 
        addr = ntohl(server_config.start); /* addr is in host order here */
        for (;addr <= ntohl(server_config.end); addr++) {
@@ -134,17 +125,20 @@ uint32_t find_address(int check_expired)
                /* ie, 192.168.55.255 */
                if ((addr & 0xFF) == 0xFF) continue;
 
-               /* lease is not taken */
-               ret = htonl(addr);
-               if ((!(lease = find_lease_by_yiaddr(ret)) ||
+               /* Only do if it isn't an assigned as a static lease */
+               if (!reservedIp(server_config.static_leases, htonl(addr))) {
 
-                    /* or it expired and we are checking for expired leases */
-                    (check_expired  && lease_expired(lease))) &&
+                       /* lease is not taken */
+                       ret = htonl(addr);
+                       lease = find_lease_by_yiaddr(ret);
 
-                    /* and it isn't on the network */
-                    !check_ip(ret)) {
-                       return ret;
-                       break;
+                       /* no lease or it expired and we are checking for expired leases */
+                       if ( (!lease || (check_expired && lease_expired(lease)))
+                        && /* and it isn't on the network */ !check_ip(ret)
+                       ) {
+                               return ret;
+                               break;
+                       }
                }
        }
        return 0;