yh Tang / Mbed OS NuMaker-mbed-AWS-IoT-example

NuMaker connection with AWS IoT thru MQTT/HTTPS

Dependencies:   MQTT_ON_AWS

mbed_app.json@26:e5cfc2628e84, 2019-04-15 (annotated)

Committer:
ccli8
Date:
Mon Apr 15 17:31:56 2019 +0800
Revision:
26:e5cfc2628e84
Parent:
23:5111e398e651
Child:
27:b12add202b88
Reduce memory footprint according to RFC 6066 TLS extension



1. Enable RFC 6066 max_fragment_length extension.

2. Reduce `MBEDTLS_SSL_IN_CONTENT_LEN`/`MBEDTLS_SSL_OUT_CONTENT_LEN` to 4KiB/4KiB from 16KiB/16KiB.



But this approach is risky because:

1. AWS IoT doesn't support RFC 6066 TLS extension yet.

2. TLS handshake may need larger I/O buffers than configured 4KiB/4KiB. 4KiB/4KiB is minimum

   to pass TLS handshake per test.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ccli8 1:5ffad9f24d63 1 {
ccli8 1:5ffad9f24d63 2 "macros": [
ccli8 1:5ffad9f24d63 3 "MBED_CONF_APP_MAIN_STACK_SIZE=4096",
ccli8 12:97762a6f55e9 4 "MBEDTLS_USER_CONFIG_FILE=\"mbedtls_user_config.h\""
ccli8 1:5ffad9f24d63 5 ],
ccli8 1:5ffad9f24d63 6 "target_overrides": {
ccli8 1:5ffad9f24d63 7 "*": {
ccli8 13:8114b540d342 8 "platform.stdio-baud-rate" : 115200,
ccli8 12:97762a6f55e9 9 "platform.stdio-convert-newlines" : true,
ccli8 12:97762a6f55e9 10 "platform.heap-stats-enabled" : 1,
ccli8 23:5111e398e651 11 "platform.stack-stats-enabled" : 1,
ccli8 12:97762a6f55e9 12 "mbed-trace.enable" : null,
ccli8 12:97762a6f55e9 13 "nsapi.default-wifi-security" : "WPA_WPA2",
ccli8 12:97762a6f55e9 14 "nsapi.default-wifi-ssid" : "\"SSID\"",
ccli8 12:97762a6f55e9 15 "nsapi.default-wifi-password" : "\"Password\"",
ccli8 12:97762a6f55e9 16 "drivers.uart-serial-rxbuf-size" : 1024,
ccli8 12:97762a6f55e9 17 "drivers.uart-serial-txbuf-size" : 1024
ccli8 1:5ffad9f24d63 18 },
ccli8 1:5ffad9f24d63 19 "NUMAKER_PFM_NUC472": {
ccli8 21:0903065795a0 20 "target.network-default-interface-type" : "ETHERNET",
ccli8 26:e5cfc2628e84 21 "my-tlssocket.tls-max-frag-len" : 4,
ccli8 26:e5cfc2628e84 22 "target.macros_add" : ["ESP8266_AT_SEL=ESP8266_AT_EXTERN"]
ccli8 1:5ffad9f24d63 23 },
ccli8 1:5ffad9f24d63 24 "NUMAKER_PFM_M487": {
ccli8 21:0903065795a0 25 "target.network-default-interface-type" : "ETHERNET",
ccli8 26:e5cfc2628e84 26 "my-tlssocket.tls-max-frag-len" : 4,
ccli8 26:e5cfc2628e84 27 "target.macros_add" : ["ESP8266_AT_SEL=ESP8266_AT_EXTERN"]
ccli8 15:47ab2fe3a0fc 28 },
ccli8 15:47ab2fe3a0fc 29 "NUMAKER_IOT_M487": {
ccli8 15:47ab2fe3a0fc 30 "target.network-default-interface-type" : "WIFI",
ccli8 26:e5cfc2628e84 31 "my-tlssocket.tls-max-frag-len" : 4,
ccli8 26:e5cfc2628e84 32 "target.macros_add" : ["ESP8266_AT_SEL=ESP8266_AT_ONBOARD"]
ccli8 1:5ffad9f24d63 33 }
ccli8 1:5ffad9f24d63 34 }
ccli8 1:5ffad9f24d63 35 }