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Add support for RFC 3442 classless static routes provided via DHCP
option 121.
Originally-implemented-by: Hazel Smith <hazel.smith@leicester.ac.uk>
Originally-implemented-by: Raphael Pour <raphael.pour@hetzner.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Extend the definition of an IPv4 routing table entry to allow for the
expression of non-default gateways for specified off-link subnets, and
of on-link secondary subnets (where we can send directly to the
destination address even though our source address is not within the
subnet).
This more precise definition also allows us to correctly handle
routing in the (uncommon for iPXE) case when multiple network
interfaces are open concurrently and more than one interface has a
default gateway.
The common case of a single IPv4 address/netmask and a default gateway
now results in two routing table entries. To retain backwards
compatibility with existing documentation (and to avoid on-screen
clutter), the "route" command prints default gateways on the same line
as the locally assigned address. There is therefore no change in
output from the "route" command unless explicit additional (off-link
or on-link) routes are present.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Redefine various IPv4 address constants and testing macros to avoid
unnecessary byte swapping at runtime, and slightly rename the macros
to prevent code from accidentally using the old definitions.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Relicense files for which I am the sole author (as identified by
util/relicense.pl).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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The implementation of inet_aton() has an unknown provenance. Rewrite
this code to avoid potential licensing uncertainty.
Also move the code from core/misc.c to its logical home in net/ipv4.c,
and add a few extra test cases.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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