MINOR: proxy_protocol: Ingest PP2_TYPE_UNIQUE_ID on incoming connections
This patch reads a proxy protocol v2 provided unique ID and makes it
available using the `fc_pp_unique_id` fetch.
diff --git a/reg-tests/stream/unique-id-from-proxy.vtc b/reg-tests/stream/unique-id-from-proxy.vtc
new file mode 100644
index 0000000..81ee3de
--- /dev/null
+++ b/reg-tests/stream/unique-id-from-proxy.vtc
@@ -0,0 +1,38 @@
+varnishtest "Check that we are able to read a unique-id from PROXYv2"
+
+#REQUIRE_VERSION=2.2
+
+feature ignore_unknown_macro
+
+haproxy h1 -conf {
+ defaults
+ mode http
+ timeout connect 1s
+ timeout client 1s
+ timeout server 1s
+
+ frontend echo
+ bind "fd@${fe1}" accept-proxy
+ http-after-response set-header echo %[fc_pp_unique_id,hex]
+ http-request return status 200
+} -start
+
+client c1 -connect ${h1_fe1_sock} {
+ # PROXY v2 signature
+ sendhex "0d 0a 0d 0a 00 0d 0a 51 55 49 54 0a"
+ # version + PROXY
+ sendhex "21"
+ # TCP4
+ sendhex "11"
+ # length of the address (12) + length of the TLV (8)
+ sendhex "00 14"
+ # 127.0.0.1 42 127.0.0.1 1337
+ sendhex "7F 00 00 01 7F 00 00 01 00 2A 05 39"
+ # PP2_TYPE_UNIQUE_ID + length of the value + "12345"
+ sendhex "05 00 05 31 32 33 34 35"
+
+ txreq -url "/"
+ rxresp
+ expect resp.status == 200
+ expect resp.http.echo == "3132333435"
+} -run