curl: add write-out variable 'tls_earlydata'

Add the write-out variable 'tls_earlydata' to inspect the amount of
TLSv1.3 early data that had been sent.

Closes curl#15956

docs/cmdline-opts/tls-earlydata.md

@@ -38,5 +38,8 @@ for you, it is probably not a good idea to use early data for it. curl
 cannot deduce what the security implications of your requests actually
 are and make this decision for you.
 
+The amount of early data sent can be inspected by using the `--write-out`
+variable `tls_earlydata`.
+
 **WARNING**: this option has security implications. See above for more
 details.

docs/cmdline-opts/write-out.md

@@ -262,6 +262,12 @@ the result.
 ## `time_total`
 The total time, in seconds, that the full operation lasted.
 
+## `tls_earlydata`
+The amount of bytes that were sent as TLSv1.3 early data. This is 0
+if this TLS feature was not used and negative if the data sent had
+been rejected by the server. The use of early data is enabled via
+the command line option `--tls-earlydata`. (Added in 8.12.0)
+
 ## `url`
 The URL that was fetched. (Added in 7.75.0)
 

src/tool_writeout.c

@@ -127,6 +127,8 @@ static const struct writeoutvar variables[] = {
   {"time_starttransfer", VAR_STARTTRANSFER_TIME, CURLINFO_STARTTRANSFER_TIME_T,
    writeTime},
   {"time_total", VAR_TOTAL_TIME, CURLINFO_TOTAL_TIME_T, writeTime},
+  {"tls_earlydata", VAR_TLS_EARLYDATA_SENT, CURLINFO_EARLYDATA_SENT_T,
+   writeOffset},
   {"url", VAR_INPUT_URL, CURLINFO_NONE, writeString},
   {"url.fragment", VAR_INPUT_URLFRAGMENT, CURLINFO_NONE, writeString},
   {"url.host", VAR_INPUT_URLHOST, CURLINFO_NONE, writeString},

src/tool_writeout.h

@@ -97,6 +97,7 @@ typedef enum {
   VAR_STARTTRANSFER_TIME,
   VAR_STDERR,
   VAR_STDOUT,
+  VAR_TLS_EARLYDATA_SENT,
   VAR_TOTAL_TIME,
   VAR_URLNUM,
   VAR_NUM_OF_VARS /* must be the last */

tests/data/test970

@@ -59,7 +59,7 @@ Accept: */*
 
 </protocol>
 <stdout nonewline="yes">
-{"certs":"","conn_id":0,"content_type":"text/html","errormsg":null,"exitcode":0,"filename_effective":"%LOGDIR/out%TESTNUMBER","ftp_entry_path":null,"http_code":200,"http_connect":0,"http_version":"1.1","local_ip":"127.0.0.1","local_port":13,"method":"GET","num_certs":0,"num_connects":1,"num_headers":9,"num_redirects":0,"num_retries":0,"proxy_ssl_verify_result":0,"proxy_used":0,"redirect_url":null,"referer":null,"remote_ip":"%HOSTIP","remote_port":%HTTPPORT,"response_code":200,"scheme":"http","size_download":445,"size_header":4019,"size_request":4019,"size_upload":0,"speed_download":13,"speed_upload":13,"ssl_verify_result":0,"time_appconnect":0.000013,"time_connect":0.000013,"time_namelookup":0.000013,"time_posttransfer":0.000013,"time_pretransfer":0.000013,"time_queue":0.000013,"time_redirect":0.000013,"time_starttransfer":0.000013,"time_total":0.000013,"url":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","url.fragment":null,"url.host":"127.0.0.1","url.options":null,"url.password":null,"url.path":"/%TESTNUMBER","url.port":"%HTTPPORT","url.query":null,"url.scheme":"http","url.user":null,"url.zoneid":null,"url_effective":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","urle.fragment":null,"urle.host":"127.0.0.1","urle.options":null,"urle.password":null,"urle.path":"/%TESTNUMBER","urle.port":"%HTTPPORT","urle.query":null,"urle.scheme":"http","urle.user":null,"urle.zoneid":null,"urlnum":0,"xfer_id":0,"curl_version":"curl-unit-test-fake-version"}
+{"certs":"","conn_id":0,"content_type":"text/html","errormsg":null,"exitcode":0,"filename_effective":"%LOGDIR/out%TESTNUMBER","ftp_entry_path":null,"http_code":200,"http_connect":0,"http_version":"1.1","local_ip":"127.0.0.1","local_port":13,"method":"GET","num_certs":0,"num_connects":1,"num_headers":9,"num_redirects":0,"num_retries":0,"proxy_ssl_verify_result":0,"proxy_used":0,"redirect_url":null,"referer":null,"remote_ip":"%HOSTIP","remote_port":%HTTPPORT,"response_code":200,"scheme":"http","size_download":445,"size_header":4019,"size_request":4019,"size_upload":0,"speed_download":13,"speed_upload":13,"ssl_verify_result":0,"time_appconnect":0.000013,"time_connect":0.000013,"time_namelookup":0.000013,"time_posttransfer":0.000013,"time_pretransfer":0.000013,"time_queue":0.000013,"time_redirect":0.000013,"time_starttransfer":0.000013,"time_total":0.000013,"tls_earlydata":0,"url":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","url.fragment":null,"url.host":"127.0.0.1","url.options":null,"url.password":null,"url.path":"/%TESTNUMBER","url.port":"%HTTPPORT","url.query":null,"url.scheme":"http","url.user":null,"url.zoneid":null,"url_effective":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","urle.fragment":null,"urle.host":"127.0.0.1","urle.options":null,"urle.password":null,"urle.path":"/%TESTNUMBER","urle.port":"%HTTPPORT","urle.query":null,"urle.scheme":"http","urle.user":null,"urle.zoneid":null,"urlnum":0,"xfer_id":0,"curl_version":"curl-unit-test-fake-version"}
 </stdout>
 </verify>
 </testcase>

tests/data/test972

@@ -60,7 +60,7 @@ Accept: */*
 
 </protocol>
 <stdout mode="text">
-{"certs":"","conn_id":0,"content_type":"text/html","errormsg":null,"exitcode":0,"filename_effective":"%LOGDIR/out%TESTNUMBER","ftp_entry_path":null,"http_code":200,"http_connect":0,"http_version":"1.1","local_ip":"127.0.0.1","local_port":13,"method":"GET","num_certs":0,"num_connects":1,"num_headers":9,"num_redirects":0,"num_retries":0,"proxy_ssl_verify_result":0,"proxy_used":0,"redirect_url":null,"referer":null,"remote_ip":"%HOSTIP","remote_port":%HTTPPORT,"response_code":200,"scheme":"http","size_download":445,"size_header":4019,"size_request":4019,"size_upload":0,"speed_download":13,"speed_upload":13,"ssl_verify_result":0,"time_appconnect":0.000013,"time_connect":0.000013,"time_namelookup":0.000013,"time_posttransfer":0.000013,"time_pretransfer":0.000013,"time_queue":0.000013,"time_redirect":0.000013,"time_starttransfer":0.000013,"time_total":0.000013,"url":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","url.fragment":null,"url.host":"127.0.0.1","url.options":null,"url.password":null,"url.path":"/%TESTNUMBER","url.port":"%HTTPPORT","url.query":null,"url.scheme":"http","url.user":null,"url.zoneid":null,"url_effective":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","urle.fragment":null,"urle.host":"127.0.0.1","urle.options":null,"urle.password":null,"urle.path":"/%TESTNUMBER","urle.port":"%HTTPPORT","urle.query":null,"urle.scheme":"http","urle.user":null,"urle.zoneid":null,"urlnum":0,"xfer_id":0,"curl_version":"curl-unit-test-fake-version"}
+{"certs":"","conn_id":0,"content_type":"text/html","errormsg":null,"exitcode":0,"filename_effective":"%LOGDIR/out%TESTNUMBER","ftp_entry_path":null,"http_code":200,"http_connect":0,"http_version":"1.1","local_ip":"127.0.0.1","local_port":13,"method":"GET","num_certs":0,"num_connects":1,"num_headers":9,"num_redirects":0,"num_retries":0,"proxy_ssl_verify_result":0,"proxy_used":0,"redirect_url":null,"referer":null,"remote_ip":"%HOSTIP","remote_port":%HTTPPORT,"response_code":200,"scheme":"http","size_download":445,"size_header":4019,"size_request":4019,"size_upload":0,"speed_download":13,"speed_upload":13,"ssl_verify_result":0,"time_appconnect":0.000013,"time_connect":0.000013,"time_namelookup":0.000013,"time_posttransfer":0.000013,"time_pretransfer":0.000013,"time_queue":0.000013,"time_redirect":0.000013,"time_starttransfer":0.000013,"time_total":0.000013,"tls_earlydata":0,"url":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","url.fragment":null,"url.host":"127.0.0.1","url.options":null,"url.password":null,"url.path":"/%TESTNUMBER","url.port":"%HTTPPORT","url.query":null,"url.scheme":"http","url.user":null,"url.zoneid":null,"url_effective":"http://%HOSTIP:%HTTPPORT/%TESTNUMBER","urle.fragment":null,"urle.host":"127.0.0.1","urle.options":null,"urle.password":null,"urle.path":"/%TESTNUMBER","urle.port":"%HTTPPORT","urle.query":null,"urle.scheme":"http","urle.user":null,"urle.zoneid":null,"urlnum":0,"xfer_id":0,"curl_version":"curl-unit-test-fake-version"}
 </stdout>
 </verify>
 </testcase>