According to rfc5681:
https://tools.ietf.org/html/rfc5681
Paragraph 3.2. Fast Retransmit/Fast Recovery
The TCP sender SHOULD use the "fast retransmit" algorithm to detect
and repair loss, based on incoming duplicate ACKs. The fast
retransmit algorithm uses the arrival of 3 duplicate ACKs (as defined
in section 2, without any intervening ACKs which move SND.UNA) as an
indication that a segment has been lost. After receiving 3 duplicate
ACKs, TCP performs a retransmission of what appears to be the missing
segment, without waiting for the retransmission timer to expire.
Now consider the following scenario:
Server sends packets to client P0, P1, P2 .. PK.
Client sends packets to server P`0 P`1 ... P`k.
I.e. it is a pipelined conversation. Now lets assume that P1 is lost, Client will
send an empty "duplicate" ack upon receive of P2, P3... In addition client will
also send a new packet with "Client Data", P`0 P`1 .. e.t.c. according to sever receive
window and client congestion window.
Current implementation resets "duplicate" ack count upon receive of packets from client
that holds new data. This in turn prevents server from fast recovery upon 3-duplicate acks
receive.
This is not required as in this case "sender unacknowledged window" is not moving.
Signed-off-by: Solganik Alexander <sashas@lightbitslabs.com>
This adds support for RFC4075 SNTP server configuration via DHCPv6.
The DHCPv6 options transmitted are now conditional on how LwIP is
configured.
A new SNTP application option SNTP_GET_SERVERS_FROM_DHCPV6 is used
to enable. For simplicity this is configured to use the global
LWIP_DHCP6_GET_NTP_SRV configuration setting.
Tests:
- Check the global options now control the DHCPv6 request sent
in Wireshark
- Check against 0, 1 and 3 SNTP servers configured on an odhcpd
server configured to support RFC 4075 SNTP server lists.
Verify that the SNTP server list is updated on connection
establishment on an ESP8266 WeMOS D1.
- Verify that SNTP packets are sent and recieved from a
configured server and that system time is updated.
Signed-off-by: David J. Fiddes <D.J@fiddes.net>
This reverts commit 684adaca29.
It changes the behaviour to assert for applications running good so far.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
New etharp queries should restart the 5 second timeout on the ARP
table entry if it is still pending.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This reverts commit 1570dd8ad1.
Buffering pcb->local_port is needed because TCP_PCB_REMOVE_ACTIVE()
sets it to 0 via tcp_pcb_remove() (comment: "reset the local port
to prevent the pcb from being 'bound'").
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Squashed commit of the following:
commit 2d98d8e2ef1941c3824ffb874f1e529d284667fc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 16:15:06 2018 +0200
AUTOIP: correct functionality autoip_supplied_address
It does not mean that if autoip is bound, it also supplied the
netif address. A check is added.
commit 2ca0a2183991ef73860c4207d95799b37acc64cc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 16:06:49 2018 +0200
AUTOIP: keep using the same link local address as much as possible
Only calculate a new link local address at start up or when a
conflict occured. On link up or down -> keep same address.
TODO: in the future a function for persistent storage should be
added.
commit aa70a693351e4c898aa28d8521308794614838f1
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 14:43:14 2018 +0200
ACD, AUTOIP & DHCP: make link up & down functions where needed
When the link goes down or up the approriate functions should be
stopped or started again. To accomodate this, network_changed is
adjusted to network_changed_link_up and network_changed_link_down.
DHCP does not need to control AUTOIP. AUTOIP can take care of
itself. The only thing DHCP needs to do is starting it when
discovering is failing. The AUTOIP state variable is removed from
DHCP.
commit ad469eb006b47f8a8c37f7c0de0216f47a8c19c7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Sep 13 11:25:58 2018 +0200
ACD: add address change listener + passive conflict detection mode
In the case their previously was a LL address on a netif that
is now configured with a routable address, we want the LL
address to be able to keep receiving packets.
for as long as the LL address is available on the interface it
should do ongoing conflict detection. But we cannot defend when
the LL address is not the netif address any more.
An address change listener is added to detect when an ACD module
needs to go from active ongoing conflict detection to passive.
When a conflict is detected autoip is stopped and will not be able
to receive packets any more. Because we have a valid routable
address on the netif, autoip is not restarted.
commit 07c4ec20cea78e2b4a6f5599569abaf075619c62
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Sep 11 16:25:37 2018 +0200
ACD: make module reusable within a netif
DHCP and AUTOIP both have ACD running simultaniously. The ACD
struct is added to the DHCP and AUTOIP structs. In the netif a list
of ACD modules is kept to loop over if functions need to perform
some action on all ACD modules (for example tmr function). With
acd_add a module can be added to the list. ACD_FOREACH loops over
the list similar to NETIF_FOREACH.
commit ee3b4585b7768f5353dd80190a2929bad45f7ff4
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Sep 10 16:36:18 2018 +0200
etharp & acd: add probe and announce functions to etharp.
The new probe and announce functions are independent of
netif->ip_addr. This means we can keep the LL address working
while we start to probe for the newly received routable address.
The netif->ip_addr does not need to be any for probing to work
with this patch.
commit 7d3032bae8f1b8081368a807682388eb642729e0
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Sep 3 13:35:51 2018 +0200
autoip -> unused random function removed + small comment update
commit be749ba4eb26ddc69233c85d532dc035741275c5
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 16:37:36 2018 +0200
ACD: update comment in header
commit 4491842991c90b3a58fa327f70aa42f04174546b
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 15:44:45 2018 +0200
ACD: subscribe to link down messages to stop the acd process
When the link goes down the acd process should be stopped
independent of the acd client. Otherwise the acd will keep probing
or announcing while their simply is no connection.
commit 71f668aa7583354e132c20b3b50ba2c86bf08738
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 13:59:44 2018 +0200
DHCP coop autoip bug fix: wait after last discovery before starting autoip
After the last dhcp discovery we need to give the dhcp server the
time to respond. Currently the discovery message is send and autoip
is started simultaniously. This is changed. Autoip will now be started
after the next discovery timeout.
commit 0da16604ec079195533f2591f0d0f04bdf212a72
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Aug 31 11:23:31 2018 +0200
ACD: rate limit interval bug solved -> first decline then wait then restart.
According the the ACD RFC we need to limit the rate of acquiring
and probing addresses after MAX_CONFLICTS. It is important to first
decline the address and stop the netif from using the address before
the time is started. After this rate limit time, the address acquiring
process can be started again.
To make this possible we had to change the callback function and
the location in the process were the rate limiting is done.
commit a89a0601a251acb14abe270116f38c6d25c2d7a9
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Aug 30 17:27:10 2018 +0200
DHCP: after a succesful dhcp_reboot, the address should be probed.
Reboot means that the connection was gone for some amount of time.
This is seen as a new connection for the ACD module so should be
the address should be probed before use.
commit 853afb448ba35c6e2b35e8238c9c367c599dece7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Aug 30 17:19:12 2018 +0200
DHCP_DOES_ARP_CHECK changed to DHCP_DOES_ACD_CHECK
small update in opt.h to add the correct dependencies.
commit e28b4766bdef69e76f6170c470c93f5b251c579a
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Thu Aug 30 17:05:43 2018 +0200
DHCP check code replaced by ACD module.
when DHCP_DOES_ARP_CHECK is enabled, the ACD module will take care
of address conflict detection. Via a call back function the DHCP
state machine will continue and bind to an address if no conflicts
are found.
dhcp_arp_reply is obsolete because the ACD module replaces its
function.
commit 52193a0f5d13e8786a4db2fff1f1a8f1367a4eba
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Aug 27 16:05:22 2018 +0200
Issue 2 + 3 from Comment #5, task #13508 solved
Removed C++ comments and // ----... marks as requested.
commit 7faaf61275d67ccfb88ea7e26c249428c3088536
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Aug 27 15:55:24 2018 +0200
Issue 1 from Comment #5, task #13508 solved
Comments added to clarify how arp messages are handled.
commit 9348aea22623b705759fd30b873f06a50a104d16
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:45:35 2018 +0200
acd: add comment for callback function
commit 49fdd1177c05b74d49fa179564dcaa5e650adbcc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:42:59 2018 +0200
autoip: Add debugging output and complete comments
commit 591856b82c029687a657a1b1ccc674522e6f4be0
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:25:18 2018 +0200
Removed autoip from timeouts.c
We do not need a timer anymore. All timing is part of acd.
commit 3b3272fdd14015cfca0b3b6d149505b1cf0e36b6
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:22:32 2018 +0200
autoip_network_changed -> first bring down the netif and then acd
Make it do what it says in the comment
commit 77b0ccf96efd22774279c6f9b5bade18c5e42c59
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:21:23 2018 +0200
Simplified the autoIP states + update autoip_start()
commit 96e0581d36857f8b70c4b4cce4fb323fd3dd51ab
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:10:48 2018 +0200
Deleted unused variables, functions and defines from autoip module
The functionality is now embedded in the acd module so can be
removed from autoip.
commit 9296e2ebb4b51019aaccfc47e8b9f51b265d37cd
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 24 11:07:34 2018 +0200
Bug fix acd -> rate limiting needs to be after MAX conflicts
It was only after MAX conflicts + 1.
commit c55e16903c045d0ea84336b50eccbf24d3d097e9
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 17:52:45 2018 +0200
Small intruduction to module added
commit d1498a37293bd9f97f6b938b48e5980ab0a01bd1
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 17:49:58 2018 +0200
Copyright information added
I based the copyright text on the other files. I'm not sure this
is how its done. I kept Dominik in their because I copied quite
some code from the autoip module.
commit 359a845ef5e73061832069f364b370634ee0b071
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 17:08:44 2018 +0200
Fixing comments in acd.c
commit 100d72549d0ef44157143d031848a727f5dfbe69
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 23 15:43:40 2018 +0200
Probe wait time and Probe interval time made random via lwip_rand
According to the RFC a random amount of time needs to be waited
before probing can be started also a random amount of time
needs to be waited between the probes.
The random time is calculated via the LWIP_RAND function (see
lwipopts and sys_arch).
commit f7f037c32e9416f8b803c3c7af617b871b55ee35
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 16:56:48 2018 +0200
autoip will start probing again when the network has changed
commit 1f40f6274195f24aa1b05caf82b79285ad189c2a
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 16:55:47 2018 +0200
Duplicate code removed -> already present in autoip_start
commit be59431271da862a8ca330dbca638842c87765bc
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 16:52:49 2018 +0200
add rate limiting to acd when too many conflicts are detected.
When more then max conflicts are detected during device on time,
the rate at which probing for a new address starts is limited.
For clarity we combined the conflict counting and the callback into
a new function acd_restart.
commit 91448455e95edb24c1f418c341b6fb306391f4f1
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:50:01 2018 +0200
ARP packet conflict detection added.
If a conflict is detected between the begin until after announce
wait, a new address needs to be chosen immediatly.
This can occur in two situations:
1) another host already has this ip address
2) another host is also probing for the same address.
If a conflict is detected during announcing or during the ongoing
conflict detection, we defend our ip address once. If a second
conflict occurs during defend interval, we take another ip address.
If not we can keep our address and connections.
When a conflict occurs and it's decided we need a new address,
autoip is simply restarted. To do: test if a acd stop is needed.
This will become more important when DHCP is added I believe.
commit 65f47ba9444d8b9f767dc908319579323eeb8664
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:33:44 2018 +0200
Update ACD state machine with PROBE_WAIT and and ANNOUNCE_WAIT
By adding the ANNOUNCE_WAIT state, we could remove duplicate code
that was present in the original autoip state implementation.
But because we cannot directly go to ANNOUNCING we needed this
extra state during the wait period. It also makes the different
states clearer.
Their is no need to number the enum because the compiler takes
care of this standard numbering.
Also a indent issue on the state machine code is solved here.
commit 2d9f4414c7b1f2ed35c0b5cea78dabb9c9afee77
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:28:33 2018 +0200
Added an extra check for etharp responses.
Their is no need to answer a request that is initiated by ourselves.
In my test case, a conflicting request would be seen here as a
request needing a reply. Which off course isn't needed at all.
The acd module will let the requester know that it is using our
ip address.
I could not think of a reason not to add this extra check but please
check if this doesn't break other functionality.
commit f84cc1dba4061219bd1aadb97bd340278db07cd7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 15:27:13 2018 +0200
Redirect all incoming ARP messages to the ACD module.
The ACD module will scan the packets and react on conflicts.
autoip does not need the arp packets any more.
commit 9faf266993cc2df0b9434720b59b5922f17d7d33
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 10:08:39 2018 +0200
Initiate acd from autoip implementation.
The state machine in autoip is now replaced by the acd module.
commit 40a5a40d911c98e6ee8566c0adce7716f26f20e0
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 10:05:59 2018 +0200
Add simple acd state machine to timer function.
This state machine will be started from acd_start and will go
through the probing and the announcing state. At this moment the
timings are made fixed for easy debugging. Will be made variable
afterwards.
commit 0a2629bf1f7942e80ec11bcc3e163ac1a2b9a580
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 09:44:19 2018 +0200
Disable gratuitous ARP send from netif_issue_report when acd is enabled
The acd module needs to be fully under control on what arp messages are
send. It wouldn't be a clean solution if we kept this announce as one
of the announce messages.
So when ACD is enabled, this message will not be send.
commit a7b9a4d5039168723c2043677176c5c8fc69f8df
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 09:42:46 2018 +0200
ARP probe and announce functions added.
Both use etharp_requests to send out an arp message.
commit e2f1ce3fa84e2ce01bc944d8049412e156cd7cc7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Tue Jul 17 09:26:07 2018 +0200
Add conflict callback mechanism to acd module
When starting the acd with acd_start, a conflict callback has to be
provided. After probing when no conflict is detected, the callback
is called with the conflict variable on 0. From the moment a conflict
is detected, it will be called set to 1.
By not making a fixed link between acd, autoip and dhcp but working
with callback functions the user (caller) can easily use it for
fixed ip too. This keeps the acd module completely independent from
the other application layer protocols.
commit 21e7995888d2941601e99873ee129d1ea927e3f7
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 14:41:52 2018 +0200
acd_stop function added.
When calling this function the acd state machine will be put in
ACD_STATE_OFF. This will disable the acd functionality until
acd_start is called.
commit 503037fb462504e46a14ce7486bc763dbc6a8690
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 14:35:48 2018 +0200
acd_start function added
This function will allocate a struct for the acd module if one wasn't
added with acd_set_struct. It will then initialize the acd struct
and start the probe wait timer (for now fixed).
commit e439f6dffc44e93078a2976783bdebfe17304d8c
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 14:22:39 2018 +0200
ACD_DEBUG define added for enabling / disabling debug messages.
commit 80d33e1eaf092934ace1045fac096464cd5be5e9
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 11:39:37 2018 +0200
ACD struct added together with set struct function
ACD needs some variables: state, timing, probe counter etc.
We added the struct as netif data. For now one ACD module per netif
is enough. We found some unclarities about ACD with multiple IP
address on one interface. For now, ACD will only be implemented for
the IP address that is going to be used / is being used on the netif.
commit 2c4cca36744973318c3efe7cbae6384b52dc71a8
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Mon Jul 16 11:35:06 2018 +0200
Add acd timer to timeouts.c with interval of 100ms.
This timer will be used for time to wait counting etc.
Very similar to the auto ip timer.
commit e2ed447e00c4df790df21509acb4ab09b5b79e66
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 16:56:39 2018 +0200
Add ACD protocol definitions
commit 445733214460eae18817556439bed979e9b3747c
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 16:07:58 2018 +0200
Add c++ option (to use C code module in c++)
commit 63d78bc1f77ac6698c3d663a1c67b40a0c297125
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 15:57:34 2018 +0200
Added on off option for ACD module
commit d5ec4b69eb4175d4dd569bcfc80ae0e192780015
Author: Jasper Verschueren <jasper.verschueren@apart-audio.com>
Date: Fri Jul 13 15:09:40 2018 +0200
ACD IPv4 module files added
The files for IPv4 ACD or Address Conflict Detection are added
to the lwip source.
not needed any more since commit b0344518e8
"sockets.c: Don't rely on #defines in socket.h to be in sync with ip.h
Map SO_* to SOF_* #defines"
Reported by Joan Lledó on mailinglist 6.Sep.2018
When the network is changed, dhcp is rebooted.
It will send a dhcp request again to verify it's lease.
DHCP requests are send out in selecting state, rebinding, renewing
and rebooting. But in the rebooting state the hostname option is
not included. This means that after reboot, the hostname will be
unknown to the DNS.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This fixes an issue seen on MacOS with Clang 9.0.0:
../../../../lwip/src/core/ipv4/etharp.c:1069:142: error: format specifies type 'unsigned short' but the argument has type 'netif_addr_idx_t'
(aka 'unsigned char') [-Werror,-Wformat]
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: dropped previously queued packet %p for ARP entry %"U16_F"\n", (void *)q, i));
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
../../../../lwip/src/core/ipv4/etharp.c:1074:120: error: format specifies type 'unsigned short' but the argument has type 'netif_addr_idx_t'
(aka 'unsigned char') [-Werror,-Wformat]
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: queued packet %p on ARP entry %"U16_F"\n", (void *)q, i));
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
By default, netif_addr_idx_t is u8_t, so cast up to u16_t to match the format type
If a chained pbuf starts with DHCP_OPTION_PAD, an overflow check
triggers and the packet is ignored.
Fix this by changing the way the offset is increased for PAD.
Also ignore a packet that is missing the END option.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Can be combined into a single check using LWIP_MIN.
See bug #54194
Reported-by: Andrey Vinogradov <andrey.vinogradov@teplomonitor.ru>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
The new NULL checking against netif_input_fn make ppp stop working
because in ppp_new() it calls netif_add with NULL netif_input_fn.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Fix the case where nd6_send_rs() fails: send one solicitation here,
not LWIP_ND6_MAX_MULTICAST_SOLICIT.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
... and add a unit test for it.
Moved resetting netif->rs_count from all reports to link-up and netif-up only.
While at it, clean up the interface a bit so that netif->rs_count is touched
from nd6.c only.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
arp table functions, nd6 destination cache and struct netif_hint
can now be u16_t or u8_t depending on table size, so up to 32K
entries can be used in these tables (s16_t)
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This should hide the internal type used for access to the ARP table
which currently is s8_t or u8_t, depending on the use case.
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This optimizes the netif_loop_output to only schedule a call to poll when
the first packet is enqueued. This ensures netif_poll is ran once per
burst of packets that are sent (which is typical in a TCP transfer)
The old behavior scheduled a call to poll for every packet that was
enqueued and this lead to exhaustion of the MEMP_TCPIP_MSG_API memory pool
and tcpip_mbox (if port is using static mbox size). The extra callbacks are
wasted work because netif_poll drains the entire queue when ran
This issue presented itself when large TCP transfer go across the loopback
netif
This disable checksum generation and checking for the loopback netif
when LWIP_CHECKSUM_CTRL_PER_NETIF is enabled
Checksums are not needed for the loopback adapter and this will increase
performance for loopback communication
The comment in dhcp_handle_ack for 'offered_si_addr' states:
'boot file name copied in dhcp_parse_reply if not overloaded'
However this code was never reached if the packed was not 'overloaded'
Signed-off-by: goldsimon <goldsimon@gmx.de>
The code to migrate flags from original segment updating wrong variable
so both remainder and remainder_flags may be incorrect. Fix it.
Fixes: f582c88339 ("tcp: persist timer re-work (bug #50837)")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Joel Cunningham <joel.cunningham@me.com>
As the common code to call tcp/udp/raw_netif_ip_addr_changed is called
by multiple places, add netif_do_ip_addr_changed() to call them.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Simon Goldschmidt <goldsimon@gmx.de>
Need to undefine LWIP_ICMP6_DATASIZE before change the setting.
While at it, also remove the unneeded #ifndef LWIP_ICMP6_DATASIZE
checking because it is set in lwip/opt.h.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
struct netifapi_msg is defined in lwip/priv/api_msg.h rather than
lwip/netifapi.h. Thus remove include of lwip/netifapi.h from memp.c.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
See bug #50914( TCP_CHECKSUM_ON_COPY when adding data to
retransmission): when adding data to an already transmitted segment
that has an uneven length, the checksum was wrong.
To fix this, tcp_output_segment has to restore seg->chksum_swapped
before returning.
This hook is called from tcp_input() for all kinds of input pcbs when
selected to receive a pbuf (LISTEN, TIME_WAIT, rest). I can parse or
drop an rx pbuf.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This introduces the concept of ext (external/extended) arguments per
tcp_pcb (also for listening pcbs) to store more data than just one
"void *arg" per pcb. The "arg" is for use to applications, whereas
the ext_args may be used by frameworks and leave "arg" untouched.
In addition to a void pointer, callbacks are added to help frameworks
migrate arguments from listen pcb to connection pcb and to free args
when the pcb is freed.
Signed-off-by: goldsimon <goldsimon@gmx.de>
This should make it easier to add debugging messages or other hooks
to the point where tcp pcbs are deallocated.
Signed-off-by: goldsimon <goldsimon@gmx.de>
tcp_rst, tcp_send_empty_ack, tcp_keepalive and tcp_zero_window_probe
all execute the same instructions to send a segment pbuf.
Combined into tcp_output_control_segment().
This file has been a mess regarding the order of the functions.
By moving them around, they can be grouped into functions taking
part in normal data transmission (via unsent/unacked) and control
segments (which are allocated, directly sent and freed).
Signed-off-by: goldsimon <goldsimon@gmx.de>
