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Implement exponential backoff in dhcp.c
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@ -298,7 +298,7 @@ dhcp_select(struct netif *netif)
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LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_select: could not allocate DHCP request\n"));
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}
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dhcp->tries++;
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msecs = dhcp->tries < 4 ? dhcp->tries * 1000 : 4 * 1000;
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msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
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dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
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LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_select(): set request timeout %"U16_F" msecs\n", msecs));
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return result;
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@ -828,7 +828,7 @@ dhcp_discover(struct netif *netif)
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autoip_start(netif);
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}
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#endif /* LWIP_DHCP_AUTOIP_COOP */
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msecs = dhcp->tries < 4 ? (dhcp->tries + 1) * 1000 : 10 * 1000;
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msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
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dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
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LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover(): set request timeout %"U16_F" msecs\n", msecs));
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return result;
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