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[dhcp] Don't consider invalid offers to be duplicates
This fixes a regression in BOOTP support; since BOOTP requests often have the `siaddr' field set to 0.0.0.0, they would be considered duplicates of the first zeroed-out offer slot. Signed-off-by: Joshua Oreman <oremanj@rwcr.net> Signed-off-by: Michael Brown <mcb30@ipxe.org>
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@ -417,13 +417,13 @@ static void dhcp_rx_offer ( struct dhcp_session *dhcp,
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/* Enqueue an offer to be filled in */
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for ( i = 0 ; i < DHCP_MAX_OFFERS ; i++ ) {
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if ( ! dhcp->offers[i].valid )
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break;
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if ( dhcp->offers[i].server.s_addr == server_id.s_addr ) {
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DBGC ( dhcp, " dup\n" );
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return;
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}
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if ( ! dhcp->offers[i].valid )
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break;
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}
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if ( i == DHCP_MAX_OFFERS ) {
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DBGC ( dhcp, " dropped\n" );
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