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dhcpserver: Option to change lease time multiplier and number of max

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stations connected to it.

Merges: https://github.com/espressif/esp-idf/pull/1206
This commit is contained in:
Krzysztof Bociurko 2017-10-31 19:13:04 +01:00 committed by Angus Gratton
parent 02304ad83e
commit 626ad5f577
3 changed files with 32 additions and 8 deletions
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22
components/lwip/Kconfig
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@ -111,6 +111,28 @@ config LWIP_DHCP_DOES_ARP_CHECK
Enabling this option performs a check (via ARP request) if the offered IP address
is not already in use by another host on the network.
menu "DHCP server"
config LWIP_DHCPS_LEASE_UNIT
int "Multiplier for lease time, in seconds"
range 1 3600
default 60
help
The DHCP server is calculating lease time multiplying the sent
and received times by this number of seconds per unit.
The default is 60, that equals one minute.
config LWIP_DHCPS_MAX_STATION_NUM
int "Maximum number of stations"
range 1 64
default 8
help
The maximum number of DHCP clients that are connected to the server.
After this number is exceeded, DHCP server removes of the oldest device
from it's address pool, without notification.
endmenu # DHCPS
menuconfig LWIP_AUTOIP
bool "Enable IPV4 Link-Local Addressing (AUTOIP)"
default n

14
components/lwip/apps/dhcpserver.c
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@ -63,7 +63,7 @@
#define DHCPS_DEBUG 0
#define DHCPS_LOG printf
#define MAX_STATION_NUM 8
#define MAX_STATION_NUM CONFIG_LWIP_DHCPS_MAX_STATION_NUM
#define DHCPS_STATE_OFFER 1
#define DHCPS_STATE_DECLINE 2
@ -311,10 +311,10 @@ static u8_t *add_offer_options(u8_t *optptr)
*optptr++ = DHCP_OPTION_LEASE_TIME;
*optptr++ = 4;
*optptr++ = ((dhcps_lease_time * 60) >> 24) & 0xFF;
*optptr++ = ((dhcps_lease_time * 60) >> 16) & 0xFF;
*optptr++ = ((dhcps_lease_time * 60) >> 8) & 0xFF;
*optptr++ = ((dhcps_lease_time * 60) >> 0) & 0xFF;
*optptr++ = ((dhcps_lease_time * DHCPS_LEASE_UNIT) >> 24) & 0xFF;
*optptr++ = ((dhcps_lease_time * DHCPS_LEASE_UNIT) >> 16) & 0xFF;
*optptr++ = ((dhcps_lease_time * DHCPS_LEASE_UNIT) >> 8) & 0xFF;
*optptr++ = ((dhcps_lease_time * DHCPS_LEASE_UNIT) >> 0) & 0xFF;
*optptr++ = DHCP_OPTION_SERVER_ID;
*optptr++ = 4;
@ -800,8 +800,8 @@ static u8_t parse_options(u8_t *optptr, s16_t len)
*******************************************************************************/
static s16_t parse_msg(struct dhcps_msg *m, u16_t len)
{
u32_t lease_timer = (dhcps_lease_time * 60)/DHCPS_COARSE_TIMER_SECS;
u32_t lease_timer = (dhcps_lease_time * DHCPS_LEASE_UNIT)/DHCPS_COARSE_TIMER_SECS;
if (memcmp((char *)m->options, &magic_cookie, sizeof(magic_cookie)) == 0) {
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: len = %d\n", len);

4
components/lwip/include/lwip/apps/dhcpserver.h
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@ -14,6 +14,7 @@
#ifndef __DHCPS_H__
#define __DHCPS_H__
#include "sdkconfig.h"
#include "lwip/ip_addr.h"
typedef struct dhcps_state{
@ -50,7 +51,8 @@ enum dhcps_offer_option{
#define DHCPS_COARSE_TIMER_SECS 1
#define DHCPS_MAX_LEASE 0x64
#define DHCPS_LEASE_TIME_DEF (120)
#define DHCPS_LEASE_TIME_DEF (120)
#define DHCPS_LEASE_UNIT CONFIG_LWIP_DHCPS_LEASE_UNIT
struct dhcps_pool{
ip4_addr_t ip;