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feat(dhcp): add menuconfig for DHCP discover retransmission interval

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This commit is contained in:
Chen Wen
2019-07-24 13:26:38 +08:00
parent f1b9e15bce
commit d64f04bc95
3 changed files with 25 additions and 0 deletions
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7
components/lwip/Kconfig
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@ -229,6 +229,13 @@ config LWIP_DHCPS_MAX_STATION_NUM
After this number is exceeded, DHCP server removes of the oldest device
from it's address pool, without notification.
config LWIP_DHCP_DISCOVER_RETRANSMISSION_INTERVAL
int "DHCP discover retransmission interval (milliseconds)"
default 250 # 4 * default retransmission interval
range 250 1000
help
Set time interval of retransmissions of DHCP discover.
endmenu #DHCP
menuconfig LWIP_AUTOIP

9
components/lwip/lwip/src/core/ipv4/dhcp.c
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@ -1007,7 +1007,16 @@ dhcp_discover(struct netif *netif)
autoip_start(netif);
}
#endif /* LWIP_DHCP_AUTOIP_COOP */
#if ESP_DHCP
/**
* Since for embedded devices it's not that hard to miss a discover packet, so lower
* the discover retry backoff time from (2,4,8,16,32,60,60)s to (500m,1,2,4,8,15,15)s.
*/
msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * LWIP_DHCP_DISCOVER_RETRANSMISSION_INTERVAL;
#else
msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
#endif
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover(): set request timeout %"U16_F" msecs\n", msecs));
return result;

9
components/lwip/port/esp8266/include/lwipopts.h
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@ -54,6 +54,7 @@
#define ESP_LWIP 1
#define ESP_IP4_ATON 1
#define ESP_DHCP 1
#ifdef CONFIG_ESP_DNS
#define ESP_DNS 1
@ -720,6 +721,14 @@ size_t memp_malloc_get_size(size_t type);
* (up to the maximum limit defined here).
*/
#define LWIP_DHCP_MAX_DNS_SERVERS DNS_MAX_SERVERS
/**
* LWIP_DHCP_DISCOVER_RETRANSMISSION_INTERVAL: DHCP discover retry backoff time.
* (default is 250, a conservative default, the maximum is 1000.)
* Since for embedded devices it's not that hard to miss a discover packet, so
* it is necessary to reduce the discovery retry backoff time.
*/
#define LWIP_DHCP_DISCOVER_RETRANSMISSION_INTERVAL CONFIG_LWIP_DHCP_DISCOVER_RETRANSMISSION_INTERVAL
/**
* @}
*/