[dhcp] Add PXE-mandated DHCP options [128,135] to parameter request list
The PXE specification requires us to request DHCP options 128 to 135
inclusive, although these have no defined purpose.
Suggested-by: Ralf Buettner <rab@bootix.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[iscsi] Fail immediately if target rejects any of our parameters
Some iSCSI targets (observed with stgt) can be configured to reject
connections that do not use header or data digests, and will respond
with "HeaderDigest=Reject" and/or "DataDigest=Reject", while still
allowing the connection to proceed to the full feature phase.
According to a strict reading of RFC3720, we are perfectly safe to
ignore these "Reject" messages: upon such a rejection "the negotiated
key is left at its current value (or default if no value was set)".
Since the default value for both HeaderDigest and DataDigest is
"None", then the only viable conclusion to be drawn is that the value
resulting from "Reject" is still "None".
Unfortunately, stgt doesn't seem to agree with this interpretation of
events, causing us to eventually report an unhelpful "connection timed
out" message to the user when we don't get any response to our first
PDU in full feature phase.
Fix by detecting any rejected parameters and immediately reporting an
error, which at least gives the user some insight as to what the real
problem may be.
Reported-by: Michal Suchanek <hramrach@centrum.cz>
Tested-by: Michal Suchanek <hramrach@centrum.cz>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[netdevice] Allow driver to preinitialise the link-layer address
Drivers are currently expected to initialise only the hardware
address, with the link-layer protocol code taking care of converting
this into a valid link-layer address. Some drivers (e.g. undinet) can
legitimately determine both the hardware and link-layer addresses,
which may differ.
Allow for this situation by checking to see if the link-layer address
is empty before initialising it from the hardware address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[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>
TCP currently neglects to allow sufficient space for its own headers
when allocating I/O buffers. This problem is masked by the fact that
the maximum link-layer header size (802.11) is substantially larger
than the common Ethernet link-layer header.
Fix by allowing sufficient space for any TCP headers, as well as the
network-layer and link-layer headers.
Reported-by: Scott K Logan <logans@cottsay.net>
Debugged-by: Scott K Logan <logans@cottsay.net>
Tested-by: Scott K Logan <logans@cottsay.net>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[retry] Fix potential use-after-free in timer_expired()
timer->refcnt is allowed to be NULL, in which case the timer's
expired() method may end up freeing the timer object.
Discovered using valgrind.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[ipv4] Use broadcast link-layer address for all broadcast IPv4 addresses
When transmitting, use the broadcast link-layer address for any
broadcast address (e.g. 192.168.0.255), not just INADDR_BROADCAST
(255.255.255.255).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Explicitly discard any unicast packets for addresses that we do not
control, to avoid unexpected behaviour when operating in promiscuous
mode (which is now the default, thanks to FCoE).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[netdevice] Allow link layer to report broadcast/multicast packets via pull()
Allow the link layer to directly report whether or not a packet is
multicast or broadcast at the time of calling pull(), rather than
relying on heuristics to determine this at a later stage.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
According to section 14.23 of RFC2616, an HTTP Host header without
port implies the default port is used. Thus, when fetching from
anywhere but port 80 for HTTP or 443 for HTTPS, the port ought to be
explicitly given in that header. Otherwise, some servers might fail
to associate the request with the correct virtual host or generate
incorrect self-referencing URLs.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The iSCSI TX process can now be woken up by the TCP socket via
xfer_window_changed(), so it is no longer valid to assume that
iscsi_tx_step() can be called in state ISCSI_TX_IDLE only immediately
after completing a transmission.
Fix by calling iscsi_tx_done() only upon a transition into state
ISCSI_TX_IDLE.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Provide support for HTTP range requests, and expose this functionality
via the iPXE block device API. This allows SAN booting from a root
path such as:
sanboot http://boot.ipxe.org/freedos/fdfullcd.iso
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[process] Pass containing object pointer to process step() methods
Give the step() method a pointer to the containing object, rather than
a pointer to the process. This is consistent with the operation of
interface methods, and allows a single function to serve as both an
interface method and a process step() method.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
ftp_data_deliver() does nothing except pass through the received data
to the xfer interface, and so can be eliminated by using a
pass-through interface.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
At the time of attempting ARP resolution, we already know the
transmitting network device. We can therefore record ARP errors using
netdev_tx_err() so that they show up in the output of "ifstat".
Inspired-by: Dominik Russenberger <dominik.russenberger@terreactive.ch>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[netdevice] Allow non-completion TX errors to be recorded
Allow TX errors to be recorded against a network device even when the
packet didn't make it as far as netdev_tx().
Inspired-by: Dominik Russenberger <dominik.russenberger@terreactive.ch>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[ipv4] Include network device metadata in packet traces
(Ab)use the "ident" field in transmitted IPv4 packets to convey
metadata about the network device. In particular:
bits 0-3 represent the low bits of the "RX" good packet counter
bits 4-7 represent the low bits of the "RXE" bad packet counter
bits 8-15 represent the transmitted packet sequence number
This allows some relevant information about the internal state of the
network device to be read out from a packet trace from a non-debug
build of iPXE. In particular, it allows a packet trace containing
packets transmitted by iPXE to indicate whether or not any packets
have been received by iPXE.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Booting from an HTTP SAN will require HTTP range requests, which are
defined only in HTTP/1.1 and above. HTTP/1.1 mandates support for
"Transfer-Encoding: chunked", so we must support it.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tcp] Update ts_recent whenever window is advanced
Commit 3f442d3 ("[tcp] Record ts_recent on first received packet")
failed to achieve its stated intention.
Fix this (and reduce the code size) by moving the ts_recent update to
tcp_rx_seq(). This is the code responsible for advancing the window,
called by both tcp_rx_syn() and tcp_rx_data(), and so the window check
is now redundant.
Reported-by: Frank Weed <zorbustheknight@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tftp] Avoid setting current working URI to "tftp://0.0.0.0/"
Set the current working URI to NULL rather than to "tftp://0.0.0.0/".
Reported-by: Piotr Jaroszyński <p.jaroszynski@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
For devices that start in a link-down state, the user will see a
message such as:
[Link status: The socket is not connected (http://ipxe.org/38086001)]
Waiting for link-up on net0...
This is potentially misleading, since it suggests that there is a
genuine problem. Add a dedicated error message for "link down",
giving instead:
[Link status: Down (http://ipxe.org/38086101)]
Waiting for link-up on net0...
Reported-by: Tal Aloni <tal.aloni.il@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[netdevice] Mark devices as open only if opening succeeds
netdev_close() assumes that devices that are open are on the
open_list, which wasn't true if device specific opening failed.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit 6861304 ("[tcp] Handle out-of-order received packets")
introduced a regression in which ts_recent would not be updated until
the first packet is received in the ESTABLISHED state, i.e. the
timestamp from the SYN+ACK packet would be ignored. This causes the
connection to be dropped by strictly-conforming TCP peers, such as
FreeBSD.
Fix by delaying the timestamp window check until after processing the
received SYN flag.
Reported-by: winders@sonnet.com
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Improve the appearance of the "config" user interface by ensuring that
settings appear in some kind of logical order.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[settings] Formalise notion of setting applicability
Expose a function setting_applies() to allow a caller to determine
whether or not a particular setting is applicable to a particular
settings block.
Restrict DHCP-backed settings blocks to accepting only DHCP-based
settings.
Restrict network device settings blocks to accepting only DHCP-based
settings and network device-specific settings such as "mac".
Inspired-by: Glenn Brown <glenn@myri.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Michael Brown