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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>
tags/v1.20.1
Joshua Oreman hace 14 años
padre
commit
905ea56753
Se han modificado 1 ficheros con 3 adiciones y 3 borrados
  1. 3
    3
      src/net/udp/dhcp.c

+ 3
- 3
src/net/udp/dhcp.c Ver fichero

@@ -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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+
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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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-
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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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