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Implement exponential backoff in dhcp.c

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This commit is contained in:
stoklund 2009-07-23 08:59:13 +00:00
parent cf81dbcca4
commit 893ddcf61b
1 changed files with 2 additions and 2 deletions
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4
src/core/dhcp.c
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@ -298,7 +298,7 @@ dhcp_select(struct netif *netif)
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_select: could not allocate DHCP request\n")); LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_select: could not allocate DHCP request\n"));
} }
dhcp->tries++; dhcp->tries++;
msecs = dhcp->tries < 4 ? dhcp->tries * 1000 : 4 * 1000; msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_select(): set request timeout %"U16_F" msecs\n", msecs)); LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_select(): set request timeout %"U16_F" msecs\n", msecs));
return result; return result;
@ -828,7 +828,7 @@ dhcp_discover(struct netif *netif)
autoip_start(netif); autoip_start(netif);
} }
#endif /* LWIP_DHCP_AUTOIP_COOP */ #endif /* LWIP_DHCP_AUTOIP_COOP */
msecs = dhcp->tries < 4 ? (dhcp->tries + 1) * 1000 : 10 * 1000; msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS; 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)); LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover(): set request timeout %"U16_F" msecs\n", msecs));
return result; return result;