diff options
Diffstat (limited to 'src/net/udp/dhcp.c')
| -rw-r--r-- | src/net/udp/dhcp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/net/udp/dhcp.c b/src/net/udp/dhcp.c index 10482e94..9a231840 100644 --- a/src/net/udp/dhcp.c +++ b/src/net/udp/dhcp.c @@ -941,6 +941,13 @@ int dhcp_create_packet ( struct dhcp_packet *dhcppkt, &dhcphdr->flags ); memcpy ( dhcphdr->options, options, options_len ); + /* If the network device already has an IPv4 address then + * unicast responses from the DHCP server may be rejected, so + * request broadcast responses. + */ + if ( ipv4_has_any_addr ( netdev ) ) + dhcphdr->flags |= htons ( BOOTP_FL_BROADCAST ); + /* Initialise DHCP packet structure */ memset ( dhcppkt, 0, sizeof ( *dhcppkt ) ); dhcppkt_init ( dhcppkt, data, max_len ); |