From 1132f43012e44cb779fd916036da9599f31983d6 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Fri, 2 Aug 2019 13:46:49 +0200
Subject: [PATCH] alt-svc: more liberal ALPN name parsing

Allow pretty much anything to be part of the ALPN identifier. In
particular minus, which is used for "h3-20" (in-progress HTTP/3
versions) etc.

Updated test 356.
Closes #4182
---
 lib/altsvc.c       | 2 +-
 tests/data/test356 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/altsvc.c b/lib/altsvc.c
index 85a4e01b5..e4d3ea605 100644
--- a/lib/altsvc.c
+++ b/lib/altsvc.c
@@ -343,7 +343,7 @@ static CURLcode getalnum(const char **ptr, char *alpnbuf, size_t buflen)
   while(*p && ISBLANK(*p))
     p++;
   protop = p;
-  while(*p && ISALNUM(*p))
+  while(*p && !ISBLANK(*p) && (*p != ';') && (*p != '='))
     p++;
   len = p - protop;
 
diff --git a/tests/data/test356 b/tests/data/test356
index e2ac4860d..1be05fe6f 100644
--- a/tests/data/test356
+++ b/tests/data/test356
@@ -16,7 +16,7 @@ Content-Length: 6
 Connection: close
 Content-Type: text/html
 Funny-head: yesyes
-Alt-Svc: h1="nowhere.foo:81"
+Alt-Svc: h1="nowhere.foo:81", un-kno22!wn=":82"
 
 -foo-
 </data>