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| author | Michael Brown | 2011-09-19 18:30:39 +0200 |
|---|---|---|
| committer | Michael Brown | 2011-09-19 18:35:42 +0200 |
| commit | 12767d2202e620e32aef3fbdd2c4ad30c4e5ac22 (patch) | |
| tree | b10f28229de9af32f3b7302f0b63b5fd76c6f694 /src/include | |
| parent | [util] Add romcheck.pl (diff) | |
| download | ipxe-12767d2202e620e32aef3fbdd2c4ad30c4e5ac22.tar.gz ipxe-12767d2202e620e32aef3fbdd2c4ad30c4e5ac22.tar.xz ipxe-12767d2202e620e32aef3fbdd2c4ad30c4e5ac22.zip | |
[dhcp] Use a random DHCP transaction identifier (xid)
iPXE currently uses the last four bytes of the MAC address as the DHCP
transaction identifier. Reduce the probability of collisions by
generating a random transaction identifier.
Originally-implemented-by: Amos Kong <akong@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/dhcp.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/include/ipxe/dhcp.h b/src/include/ipxe/dhcp.h index dbca8e633..06fb33bc0 100644 --- a/src/include/ipxe/dhcp.h +++ b/src/include/ipxe/dhcp.h @@ -660,15 +660,18 @@ struct dhcphdr { /** Setting block name used for BootServerDHCP responses */ #define PXEBS_SETTINGS_NAME "pxebs" +extern uint32_t dhcp_last_xid; extern unsigned int dhcp_chaddr ( struct net_device *netdev, void *chaddr, uint16_t *flags ); extern int dhcp_create_packet ( struct dhcp_packet *dhcppkt, struct net_device *netdev, uint8_t msgtype, - const void *options, size_t options_len, - void *data, size_t max_len ); + uint32_t xid, const void *options, + size_t options_len, void *data, + size_t max_len ); extern int dhcp_create_request ( struct dhcp_packet *dhcppkt, struct net_device *netdev, - unsigned int msgtype, struct in_addr ciaddr, + unsigned int msgtype, uint32_t xid, + struct in_addr ciaddr, void *data, size_t max_len ); extern int start_dhcp ( struct interface *job, struct net_device *netdev ); extern int start_pxebs ( struct interface *job, struct net_device *netdev, |