The maximum unscaled TCP window (64kB) implies a maximum bandwidth of
around 300kB/s on a WAN link with an RTT of 200ms. Add support for
the TCP window scaling option to remove this upper limit.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tcpip] Allow for architecture-specific TCP/IP checksum routines
Calculating the TCP/IP checksum on received packets accounts for a
substantial fraction of the response latency.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[dhcp] Request broadcast responses when we already have an IPv4 address
FCoE requires the use of multiple local unicast link-layer addresses.
To avoid the complexity of managing multiple addresses, iPXE operates
in promiscuous mode. As a consequence, any unicast packets with
non-matching IPv4 addresses are rejected at the IPv4 layer (rather
than at the link layer).
This can cause problems when issuing a second DHCP request: if the
address chosen by the DHCP server does not match the existing address,
then the DHCP response will itself be rejected.
Fix by requesting a broadcast response from the DHCP server if the
network interface already has any IPv4 addresses.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[http] Provide credentials only when requested by server
Provide HTTP Basic authentication credentials only in response to a
401 Unauthorized response from the server.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[http] Defer processing response code until after receiving all headers
Some headers can modify the meaning of the response code. For
example, a WWW-Authenticate header can change the interpretation of a
401 Unauthorized response from "Access denied" to "Please
authenticate".
Signed-off-by: Michael Brown <mcb30@ipxe.org>
iSCSI generally includes a full SCSI response only when an error
occurs. iscsi_scsi_done() currently passes the NULL response through
to scsi_response(), which ends up causing scsicmd_response() to
dereference a NULL pointer.
Fix by calling scsi_response() only if we have a non-NULL response.
Reported-by: Brendon Walsh <brendonwalsh@niamu.com>
Tested-by: Brendon Walsh <brendonwalsh@niamu.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
X.509 certificate processing currently produces an overwhelming amount
of debugging information. Move some of this from DBGLVL_LOG to
DBGLVL_EXTRA, to make the output more manageable.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Automatically attempt to download any required cross-signing
certificates from http://ca.ipxe.org/auto, in order to enable the use
of standard SSL certificates issued by public CAs.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
To allow for automatic download of cross-signing certificates and for
OCSP, the validation of certificates must be an asynchronous process.
Create a stub validator which uses a job-control interface to report
the result of certificate validation.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[crypto] Allow certificate chains to be long-lived data structures
At present, certificate chain validation is treated as an
instantaneous process that can be carried out using only data that is
already in memory. This model does not allow for validation to
include non-instantaneous steps, such as downloading a cross-signing
certificate, or determining certificate revocation status via OCSP.
Redesign the internal representation of certificate chains to allow
chains to outlive the scope of the original source of certificates
(such as a TLS Certificate record).
Allow for certificates to be cached, so that each certificate needs to
be validated only once.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[http] Avoid using stack-allocated memory in http_step()
http_step() allocates a potentially large block of storage (since the
URI can be arbitrarily long), and can be invoked as part of an already
deep call stack via xfer_window_changed().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow TFTP to be configured out by moving the next-server setting
definition (which is used by autoboot.c) from tftp.c to settings.c.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tls] Fix wrong memset in function tls_clear_cipher
sizeof(cipherspec) is obviously wrong in this context, because it will
only zero the first 4 or 8 bytes (cipherspec is a pointer).
This problem was reported by cppcheck.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[syslog] Pass internal syslog() priority through to syslog console
Use a private ANSI escape sequence to convey the priority of an
internal syslog() message through to the syslog server.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[console] Do not share ANSI escape context between lineconsole users
An ANSI escape sequence context cannot be shared between multiple
users. Make the ANSI escape sequence context part of the line console
definition and provide individual contexts for each user.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[console] Exclude text-based UI output from logfile-based consoles
The output from text-based user interfaces such as the "config"
command is not generally meaningful for logfile-based consoles such as
syslog and vmconsole.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[console] Allow usage to be defined independently for each console
Add the concept of a "console usage", such as "standard output" or
"debug messages". Allow usages to be associated with each console
independently. For example, to send debugging output via the serial
port, while preventing it from appearing on the local console:
#define CONSOLE_SERIAL CONSOLE_USAGE_ALL
#define CONSOLE_PCBIOS ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_DEBUG )
If no usages are explicitly specified, then a default set of usages
will be applied. For example:
#define CONSOLE_SERIAL
will have the same affect as
#define CONSOLE_SERIAL CONSOLE_USAGE_ALL
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tls] Treat handshake digest algorithm as a session parameter
Simplify code by recording the active handshake digest algorithm as a
session parameter. (Note that we must still accumulate digests for
all supported algorithms, since we don't know which digest will
eventually be used until we receive the Server Hello.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
TLSv1.1 and earlier use a hybrid of MD5 and SHA-1 to generate digests
over the handshake messages. Formalise this as a separate digest
algorithm "md5+sha1".
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Validate the server certificate against the trusted root certificate
store. The server must provide a complete certificate chain, up to
and including the trusted root certificate that is embedded into iPXE.
Note that the date and time are not yet validated.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[crypto] Upgrade AES and RSA code to upstream axTLS version 1.4.5
All axTLS files are now vanilla versions of the upstream axTLS files,
with one minor exception: the unused "ctx" parameter of
bi_int_divide() has been marked with "__unused" to avoid a compilation
error.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Michael Brown