The TCP2 stack does operations directly on the packet data which may
or may not be aligned. The unaligned access causes a fault on the
Cortex-M0+ so use the UNALIGNED_* macros instead.
Signed-off-by: Michael Hope <mlhx@google.com>
In order to implement a blocking connect, add a semaphore
and block on it in net_tcp_connect().
The semaphore is released when ESTABLISHED state is reached.
In case tcp_conn_unref() is called while waiting on the semaphore,
defer the unreference, tcp_conn_unref() will be called from
net_tcp_connect().
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to improve readability, refactor and simplify
the control flow in net_tcp_connect().
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order for events to be correctly interpreted in SYN_SENT,
check for SYN and ACK simultaneosly.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
net_tcp_put() can be called before ESTABLISHED state
is reached, send FIN only in ESTABLISHED state.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
Unit tests were failing to build because random header was included by
kernel_includes.h. The problem is that rand32.h includes a generated
file that is either not generated or not included when building unit
tests. Also, it is better to limit the scope of this file to where it is
used.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Need to use %zd in formatter string for net_pkt_get_len since it returns
a size_t otherwise we get something like:
error: format ‘%d’ expects argument of type ‘int’, but argument
3 has type ‘size_t’ {aka ‘long unsigned int’} [-Werror=format=]
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
In order to support the retransmission for the outgoing data:
1. The outgoing data packet is appended to the send_data queue
in net_tcp_queue_data().
2. tcp_send_queued_data() is called and will use tcp_send_data()
to sends queued but unsent data packet by packet
until there's an unsent data and the receiver's window isn't full.
tcp_send_queued_data() subscribes send_data_timer
that will handle retrasmissions with tcp_resend_data().
3. tcp_send_data() peeks a single chunk of data from the send_data
queue that will not exceed the maximum segment size
until the the receiver's window is full.
tcp_send_data() uses conn->seq and conn->unack_len as the sequence
number for the TCP packet.
conn->unacked_len is advanced on each send.
4. On data acknowledgment:
- acknowledged amount of data is removed from the beginning
of the send_data queue
- conn->seq is advanced by the acknowledged amount
- conn->unacked_len is decremented by the acknowledged amount
- send_data_timer is cancelled
- tcp_send_queued_data() is called to send queued but
prevoiusly unsent data
5. On timeout, tcp_resend_data() will reset conn->unack_len,
peek one packet from the beginning of the send_queue and resend,
terminating the connection on retries exceeded.
Meanwhile the outgoing data tcp_send_queued_data() is just
appended to the send_data but not sent.
In case of the acknowledgement, tcp_send_queued_data() will
start sending multiple packets until the receiver's window
is full.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to support the send window, add send_win into
the TCP connection.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to support the data retransmission, refactor tcp_out()
into tcp_out_ext() which supports passing the sequence number.
In addition drop modifications of the connection sequence number
from tcp_out_ext(), this is the responsibility of data retransmission.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
Unsuccessfull packet clone in tcp_data_get() isn't handled,
add an error handling and don't ACK the incoming data in this case.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to handle sequence overflow cases, use
net_tcp_seq_greater() to check if the sequence is greater/lower.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
The initial sequence number for a connection should be randomized
to prevent easy guesses.
Do not randomize the sequence number if network test or
test protocol is enabled.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to avoid retransmissions from the peer's side
on full-close, handle states properly.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
In order to fix the line tracking of the TCP packet allocation
with the test protocol enabled, refactor tcp_pkt_alloc(),
so the line of the allocation can be tracked properly.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
Make sure we only parse the received TCP options only once. Store
the options to tcp conn struct for later use.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This patch fixes an issue with TCP options reading. Previous approach
was accessing the options with pointers (th + 1). This does not work if
TCP options span multiple net_pkt buffer fragments. Instead net_pkt
functions must be used.
Signed-off-by: Ruslan Mstoi <ruslan.mstoi@intel.com>
In order to avoid retransmissions from the peer's side
on active connection close, acknowledge the incoming FIN+ACK
in FIN_WAIT_1 state.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
We cannot directly use the local address in net_context when
registering the connection as it is not proper type. So create
temp address variable for that purposes.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Avoid dynamic allocations and all the issues if we run out of
memory, by placing the connection endpoint directly to TCP
connection struct.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
In tcp_endpoint_cmd() we allocate and then almost immediately
destroy the allocated endpoint. This is quite inefficient so
use a endpoint from stack in the compare.
Separate endpoint allocation from value setting so the caller
can decide how the endpoint union values are set.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Some other part of Zephyr has similar defines (SRC)
causing build failures.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
Assigning the allocated IPv4 endpoint as struct sockaddr
leads to the memory overwrite, assign the correct structure,
i.e. struct sockaddr_in.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to implement active connection close with the
TIME_WAIT state, send FIN and enter FIN_WAIT_1 state.
We actually send FIN+ACK as most of the implementations do.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to support TIME_WAIT state during the TCP connection
termination, add a TIME_WAIT timer and the corresponding state.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to improve readability, rename TCP_FIN_WAIT
states into TCP_FIN_WAIT_1, TCP_FIN_WAIT_2.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
This patch enables handling of a single octet of option-kind at the end
of the option list (EOL). Also, add functionality to drop a segment with
an invalid single octet option-kind at the EOL.
Signed-off-by: Ruslan Mstoi <ruslan.mstoi@intel.com>
Use existing network stack calls to create net pkt,
ip header and udp header creation. Also simplify
finalize api calls.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
Use existing network stack calls to create net pkt,
ip header and tcp header creation. Also simplify
finalize api calls.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
End option indicates the end of the option list. Hence, correct way to
handle it is to break out of the option parsing routine.
Signed-off-by: Ruslan Mstoi <ruslan.mstoi@intel.com>
According to RFC 793 and IANA "TCP Option Kind Numbers" an option with
kind 0 is an End of Option List option and not a PAD.
Signed-off-by: Ruslan Mstoi <ruslan.mstoi@intel.com>
The TCP connection might be concurrently modified from the
TR/TX threads, so add a mutex to protect from the concurrent
modification.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
After removing the test windows, update test protocol
functions for the TTCN-3 sanity check.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
These test receive windows were used by TTCN-3 sanity check,
but it's possible to do without them.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to drop dependency on a heap, drop the
test send window.
Use net_tcp_queue_data() to receive the outgoing data
from the socket layer.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
In order to drop dependency on a heap, drop the test
receive window.
The receive window was needed for TTCN-3 sanity check,
but it's possible to do without it.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
