net/dhcp: avoid misleading strncpy

The code for copying an empty IP address into the DHCP opt buffer used
strncpy, however used the source length as the size argument. GCC 8.x
complains about it.

S

net/dhcp: avoid misleading strncpy

The code for copying an empty IP address into the DHCP opt buffer used
strncpy, however used the source length as the size argument. GCC 8.x
complains about it.

Since the source string is actually fixed, just revert to the old
strcpy, which gives us actually the same level of security in this case,
but makes the compiler happy.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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net/uip: Add exit function

When resetting the virtio-net queues, the UIP state needs to be reset as
well. Stop all threads (one per TCP stream and UDP connection) and free
memory.

Signed-off-by: Je

net/uip: Add exit function

When resetting the virtio-net queues, the UIP state needs to be reset as
well. Stop all threads (one per TCP stream and UDP connection) and free
memory.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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kvm tools: Fix crash when /etc/resolv.conf doesn't exist

In uip_dhcp_get_dns() we try to open /etc/resolv.conf. If we fail to
open it we then SEGV trying to fclose() it.

Fix the code to just return

kvm tools: Fix crash when /etc/resolv.conf doesn't exist

In uip_dhcp_get_dns() we try to open /etc/resolv.conf. If we fail to
open it we then SEGV trying to fclose() it.

Fix the code to just return directly if we can't open it.

Acked-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Use kernel dhcp for network autoconfiguration

This patch removes the manual/usermode dhcp client configuration and instead
uses the DHCP client built within the kernel.

Since this client

kvm tools: Use kernel dhcp for network autoconfiguration

This patch removes the manual/usermode dhcp client configuration and instead
uses the DHCP client built within the kernel.

Since this client is tightly integrated with NFS (if NFS config is set), we
will add a specific NFS root addr in our DHCP offer to point it to a non
existent address so that we won't hang trying to poke it for our root.

Acked-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Introduce uip_tx_do_ipv4_udp_dhcp()

uip_tx_do_ipv4_udp_dhcp() is used to handle DHCP packages from guest.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <pen

kvm tools: Introduce uip_tx_do_ipv4_udp_dhcp()

uip_tx_do_ipv4_udp_dhcp() is used to handle DHCP packages from guest.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Introduce uip_dhcp_make_pkg()

This patch cooks a DHCP package.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm tools: Fill all DHCP options

The following DHCP options are filled.

- MSG_TYPE

- SERVER_ID

- LEASE_TIME

- SUBMASK

- ROUTER

- DNS_SERVER

- DOMAIN_NAME

Signed-off-by:

kvm tools: Fill all DHCP options

The following DHCP options are filled.

- MSG_TYPE

- SERVER_ID

- LEASE_TIME

- SUBMASK

- ROUTER

- DNS_SERVER

- DOMAIN_NAME

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Fill DHCP options with domain name and DNS server IP

Domain name and DNS server IP address are filled.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penber

kvm tools: Fill DHCP options with domain name and DNS server IP

Domain name and DNS server IP address are filled.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Get domain name and nameserver from host

This patch get domain name and nameserver information from host config
file /etc/resolv.conf.

Guest can obtain DNS information through DHCP.

Sig

kvm tools: Get domain name and nameserver from host

This patch get domain name and nameserver information from host config
file /etc/resolv.conf.

Guest can obtain DNS information through DHCP.

Signed-off-by: Asias He <asias.hejun@gmail.com>
[ penberg@kernel.org: check fscanf() for errors ]
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Add helpers to tell the type of a DHCP message

If DHCP DISCOVER or DHCP REQUEST is found, reply with DHCP OFFER or DHCP
ACK respectively.

Signed-off-by: Asias He <asias.hejun@gmail.com>

kvm tools: Add helpers to tell the type of a DHCP message

If DHCP DISCOVER or DHCP REQUEST is found, reply with DHCP OFFER or DHCP
ACK respectively.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: Add helper to tell if a UDP package is a DHCP package

This patch checks:

- sport and dport

- magic cookie

to detemine whether a UDP package is a DHCP package.

Signed-off-by: Asi

kvm tools: Add helper to tell if a UDP package is a DHCP package

This patch checks:

- sport and dport

- magic cookie

to detemine whether a UDP package is a DHCP package.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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