[trafficserver] 02/02: Warns on empty ssl_server_name.yaml configuration file

[rrm]

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commit d59fafcbcae24ad7d6e5d033e78208531071a8a0
Author: Randall Meyer <randallme...@yahoo.com>
AuthorDate: Tue Jun 26 16:27:40 2018 -0700

    Warns on empty ssl_server_name.yaml configuration file
---
 iocore/net/YamlSNIConfig.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/iocore/net/YamlSNIConfig.cc b/iocore/net/YamlSNIConfig.cc
index 5d20ccd..06f8c6f 100644
--- a/iocore/net/YamlSNIConfig.cc
+++ b/iocore/net/YamlSNIConfig.cc
@@ -36,6 +36,11 @@ YamlSNIConfig::loader(const char *cfgFilename)
 {
   try {
     YAML::Node config = YAML::LoadFile(cfgFilename);
+    if (config.IsNull()) {
+      Warning("%s is empty", cfgFilename);
+      return ts::Errata();
+    }
+
     if (!config.IsSequence()) {
       return ts::Errata::Message(1, 1, "expected sequence");
     }