Lua 5.1 to 5.3 realignement phase 1

…cu#2914)

This reverts commit 32ad759.

Fixes nodemcu#2920

Fixes nodemcu#2928, nodemcu#2923

The internal implementation already preferentially forwards to the
encoder module, so we should just remove these functions as they confuse
people into thinking that we don't have their inverses (see the feature
request nodemcu#2907).

Update the docs to refer to the encoder version and add deprecation
warnings to the runtime implementations.

fix lfs upload issue

* clean effects library
* Fix several issues in ws2812 and effects
* Implement working way of calling shift from callback

* Remove app/include/netif/wlan_lwip_if.h

This file appears to be unused in our tree.

* New `net.if.info` call to show LwIP information

This is a generalization of `wifi.sta`'s and `wifi.ap`'s `getip` and
`getmac` calls.  I don't propose to deprecate those, but perhaps we
should, in the documentation, point users at this function instead.

The direct motivation is to permit continued use of DHCP-provided NTP
servers in a future where
nodemcu#2819 has landed, now
that nodemcu#2709 is in the
tree.  But rather than exposing just that information, a more general
interface seems useful.

* Remove stale putative MD2 support

This hasn't worked in a while, presumably since one of our upstream
merges.  Don't bother making it work, since MD2 is generally considered
insecure.

* Land mbedtls 2.16.3-77-gf02988e57

* TLS: remove some dead code from espconn_mbedtls

There was some... frankly kind of scary buffer and data shuffling if
ESP8266_PLATFORM was defined.  Since we don't, in fact, define that
preprocessor symbol, just drop the code lest anyone (possibly future-me)
be scared.

* TLS: espconn_mbedtls: run through astyle

No functional changes

* TLS: espconn_mbedtls: put the file_params on the stack

There's no need to malloc a structure that's used only locally.

* TLS: Further minor tidying of mbedtls glue

What an absolute shitshow this is.  mbedtls should absolutely not
be mentioned inside sys/socket.h and app/mbedtls/app/lwIPSocket.c is not
so much glue as it as a complete copy of a random subset of lwIP; it
should go, but we aren't there yet.

Get rid of the mysterious "mbedlts_record" struct, which housed merely a
length of bytes sent solely for gating the "record sent" callback.

Remove spurious __attribute__((weak)) from symbols not otherwise
defined and rename them to emphasize that they are not actually part of
mbedtls proper.

* TLS: Rampage esp mbedtls glue and delete unused code

This at least makes the shitshow smaller

* TLS: lwip: fix some memp definitions

I presume these also need the new arguments

* TLS: Remove more non-NodeMCU code from our mbedtls

* TLS: drop support for 1.1

Depending on who you ask it's either EOL already or EOL soon, so
we may as well get rid of it now.

* Add missing globals from luacheck config

* Fix luacheck warnings in all lua files

* Re-enable luacheck in Travis

* Speed up Travis by using preinstalled LuaRocks

* Fix more luacheck warnings in httpserver lua module

* Fix DCC module and add appropriate definitions to luacheck config.

* Change inline comments from ignoring block to only ignore specific line

* Add Luacheck for Windows and enable it for both Windows and Linux

* Change luacheck exceptions and fix errors from 1st round of polishing

* Add retry and timeout params to wget

Also clean-up a nasty `ow` module example.

Reserved words are always reserved in Lua, so let's not have people
typing net["if"]...

Here `conn` is net.socket instance, so it should be called as one.
Otherwise request is very likely to end up with crash and PANIC.

nwf edited in light of bcb669a

* mqtt: expose "connfail" callback via :on()

This makes it just like all the other callbacks in the module and is a
revision of behavior called out in
nodemcu#2967

* mqtt: clarify when puback callback fires

* mqtt: Don't reference stack buffers from the heap

The confusingly-named "mqtt_connection_t" object is just a triple of
  - a serialized mqtt message pointer and length
  - a buffer pointer (to which the above can be written)
  - a message identifier

The last of these must be passed around the mqtt state machine, but the
first two are very local and the buffer is always sourced from the C
stack.  Unfortunately, because the entire structure is persisted in the
heap, some callers assume that they can always use the structure without
reinitialization (see mqtt_socket_close), which will trash the C stack.

Sever the pairing between message id and local state, punt the local
state entirely out of the heap, and rename things to be less confusing.

Fixes nodemcu#2868

Fixes nodemcu#3034

* espconn: remove unused espconn code, take 1

This is the easiest part of nodemcu#3004 .
It removes a bunch of functions that were never called in our tree.

* espconn: De-orbit espconn_gethostbyname

Further work on nodemcu#3004

While here, remove `mqtt`'s charming DNS-retry logic (which is neither
shared with nor duplicated in other modules) and update its :connect()
return value behavior and documentation.

* espconn: remove scary global pktinfo

A write-only global!  How about that.

* net: remove deprecated methods

All the TLS stuff moved over there a long time ago, and
net_createUDPSocket should just do what it says on the tin.

* espconn_secure: remove ESPCONN_SERVER support

We can barely function as a TLS client; being a TLS server seems like a
real stretch.  This code was never called from Lua anyway.

* espconn_secure: more code removal

* espconn_secure: simplify ssl options structure

There is nothing "ssl_packet" about this structure.  Get rid of the
terrifying "pbuffer" pointer.

Squash two structure types together and eliminate an unused field.

* espconn_secure: refactor mbedtls_msg_info_load

Split out espconn_mbedtls_parse, which we can use as part of our effort
towards addressing nodemcu#3032

* espconn_secure: introduce TLS cert/key callbacks

The new feature part of nodemcu#3032
Subsequent work will remove the old mechanism.

* tls: add deprecation warnings

* luacheck: net.ifinfo is a thing now

* tls: remove use of espconn->reverse

* mqtt: stop using espconn->reverse

Instead, just place the espconn structure itself at the top of the user
data.  This enlarges the structure somewhat but removes one more layer
of dynamic heap usage and NULL checks.

While here, simplify the code a bit.

* mqtt: remove redundant pointer to connect_info

Everywhere we have the mqtt_state_t we also have the lmqtt_userdata.

* mqtt: doc fixes

* mqtt: note bug

* tls: allow :on(...,nil) to unregister a callback

The additional reporting, while nice, prevents the use of mispec on
integer-only builds

Prefer print everywhere.

IMHO, it's generally good style to register the callbacks first.

Seems more polite than quietly accepting other types as nil.

Removes yet another unchecked allocation point in our C libraries.

While here, fix potential reference leaks on error paths

Also while here, remove some stale documentation.  There can be as many
DNS requests in flight as LwIP has room for in its table
(DNS_TABLE_SIZE, which defaults to 4).

Because the old API was inactive, we were setting
MBEDTLS_SSL_VERIFY_NONE even after we'd parsed the certificate.

tls tests now include a deliberate certificate mismatch; this was
discovered by moving the mqtt tests over to the new API.

* BMP085 pressure sensor: fix temperature value data type

the data type for t (U_T) should be long according to the BMP085
datasheet (rev. 1.2, section 3.5). values over 32767 can indeed occur,
and in my case lead to a wrong value for the temperature (and
consequently also pressure).

note: this problem only occurs above a certain temperature (exact
value depends on the calibration, but I assume somewhere around 26°C).

* BMP085 pressure sensor: adapt data types and calculation

this adapts the data types and calculation to be consistent with the
datasheet (rev. 1.2, section 3.5). while I did not notice any issues,
using the wrong data types could trigger edge cases.

…#3076)

…some other sma… (nodemcu#3016)

* nodemcu#2954: adapt to the new firmware api for the timer and some other small fixes

* reduce the error msg in when not response is sent back from esp

* cleanup: remove trailing whitespaces

Co-authored-by: Adel Tayeb-Cherif <adel@evoluhome.com>

-  Lots of minor but nasty bugfixes to get all tests to run clean
-  core lua and test suite fixes to allow luac -F to run cleanly against test suite
-  next tranch to get LFS working
-  luac.cross -a options plus fixes from feedback
-  UART fixes and lua.c merge
-  commit of wip prior to rebaselining against current dev
-  more tweaks

Co-authored-by: Matsievskiy S.V <matsievskiysv@gmail.com>

* fix build

* poor mans link which also works on docker under windows

* Delete espconn.h

* resurecting it as regular file

* Add missing newline

Co-authored-by: Marcel Stör <marcelstoer@users.noreply.github.com>

Correct typo in Lua export from updateDispla() to updateDisplay()

* Net_info module exposing ping function initial commit
* Ping as a part of net module
* Sent callback implemented
* Add NET_PING_ENABLE macro

Authored-by: vsky <blue205@centrum.cz> with support from TerryE

Fixes nodemcu#3089

Original sources by @anod221

This adds an optional use-alternate-address-
parameter to all read-methods of the bme280
module. if not set, the behaviour is unchanged
and first available device will be used.
If set to true, the device at address 0x77 will
be used.

This fixes nodemcu#2241