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* Support longer lease times.

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This commit is contained in:
bg- 2007-03-16 12:16:16 +00:00
parent 109a377a91
commit cb6bda5378
2 changed files with 32 additions and 22 deletions
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48
core/net/dhcpc.c
View file

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: dhcpc.c,v 1.6 2006/09/07 15:57:59 bg- Exp $
* @(#)$Id: dhcpc.c,v 1.7 2007/03/16 12:16:16 bg- Exp $
*/
#include <stdio.h>
@ -326,18 +326,11 @@ PT_THREAD(handle_dhcp(process_event_t ev, void *data))
bound:
#if 0
printf("Got IP address %d.%d.%d.%d\n",
uip_ipaddr1(s.ipaddr), uip_ipaddr2(s.ipaddr),
uip_ipaddr3(s.ipaddr), uip_ipaddr4(s.ipaddr));
printf("Got netmask %d.%d.%d.%d\n",
uip_ipaddr1(s.netmask), uip_ipaddr2(s.netmask),
uip_ipaddr3(s.netmask), uip_ipaddr4(s.netmask));
printf("Got DNS server %d.%d.%d.%d\n",
uip_ipaddr1(s.dnsaddr), uip_ipaddr2(s.dnsaddr),
uip_ipaddr3(s.dnsaddr), uip_ipaddr4(s.dnsaddr));
printf("Got IP address %d.%d.%d.%d\n", uip_ipaddr_to_quad(&s.ipaddr));
printf("Got netmask %d.%d.%d.%d\n", uip_ipaddr_to_quad(&s.netmask));
printf("Got DNS server %d.%d.%d.%d\n", uip_ipaddr_to_quad(&s.dnsaddr));
printf("Got default router %d.%d.%d.%d\n",
uip_ipaddr1(s.default_router), uip_ipaddr2(s.default_router),
uip_ipaddr3(s.default_router), uip_ipaddr4(s.default_router));
uip_ipaddr_to_quad(&s.default_router));
printf("Lease expires in %ld seconds\n",
ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1]));
#endif
@ -345,28 +338,45 @@ PT_THREAD(handle_dhcp(process_event_t ev, void *data))
dhcpc_configured(&s);
#define MAX_TICKS (~((clock_time_t)0) / 2)
#define MAX_TICKS32 (~((u32_t)0))
#define IMIN(a, b) ((a) < (b) ? (a) : (b))
if((ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1]))*CLOCK_SECOND/2
<= MAX_TICKS) {
s.ticks = (clock_time_t)((ntohs(s.lease_time[0])*65536ul
+ ntohs(s.lease_time[1]))*CLOCK_SECOND/2);
<= MAX_TICKS32) {
s.ticks = (ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1])
)*CLOCK_SECOND/2;
} else {
s.ticks = MAX_TICKS;
s.ticks = MAX_TICKS32;
}
etimer_set(&s.etimer, s.ticks);
while(s.ticks > 0) {
clock_time_t ticks;
ticks = IMIN(s.ticks, MAX_TICKS);
s.ticks -= ticks;
etimer_set(&s.etimer, ticks);
PT_YIELD_UNTIL(&s.pt, etimer_expired(&s.etimer));
}
if((ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1]))*CLOCK_SECOND/2
<= MAX_TICKS32) {
s.ticks = (ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1])
)*CLOCK_SECOND/2;
} else {
s.ticks = MAX_TICKS32;
}
/* renewing: */
xid++;
do {
clock_time_t ticks;
while(ev != tcpip_event) {
tcpip_poll_udp(s.conn);
PT_YIELD(&s.pt);
}
send_request();
s.ticks /= 2;
etimer_set(&s.etimer, s.ticks);
ticks = IMIN(s.ticks / 2, MAX_TICKS);
s.ticks -= ticks;
etimer_set(&s.etimer, ticks);
do {
PT_YIELD(&s.pt);
if(ev == tcpip_event && uip_newdata() && msg_for_me() == DHCPACK) {

4
core/net/dhcpc.h
View file

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: dhcpc.h,v 1.3 2006/09/07 15:57:59 bg- Exp $
* @(#)$Id: dhcpc.h,v 1.4 2007/03/16 12:16:16 bg- Exp $
*/
#ifndef __DHCPC_H__
#define __DHCPC_H__
@ -38,7 +38,7 @@ struct dhcpc_state {
char state;
struct uip_udp_conn *conn;
struct etimer etimer;
clock_time_t ticks;
u32_t ticks;
const void *mac_addr;
int mac_len;