Github user jpeach commented on a diff in the pull request:
https://github.com/apache/trafficserver/pull/560#discussion_r59384993
--- Diff: plugins/experimental/acme/acme.c ---
@@ -0,0 +1,347 @@
+/** @file
+
+@section license
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/stat.h>
+
+#include "ts/ts.h"
+#include "ts/ink_platform.h"
+#include "ts/ink_defs.h"
+
+static const char PLUGIN_NAME[] = "acme";
+static const char ACME_WK_PATH[] = ".well-known/acme-challenge/";
+static const char ACME_OK_RESP[] = "HTTP/1.1 200 OK\r\nContent-Type:
application/jose\r\nCache-Control: no-cache\r\n";
+static const char ACME_DENIED_RESP[] = "HTTP/1.1 404 Not
Found\r\nContent-Type: application/jose\r\nCache-Control: no-cache\r\n";
+
+#define MAX_PATH_LEN 4096
+
+/* This should hold all configurations going forward. */
+typedef struct AcmeConfig_t {
+ char *proof;
+} AcmeConfig;
+AcmeConfig gConfig;
+
+/* State used for the intercept plugin. ToDo: Can this be improved ? */
+typedef struct AcmeState_t {
+ TSVConn net_vc;
+ TSVIO read_vio;
+ TSVIO write_vio;
+
+ TSIOBuffer req_buffer;
+ TSIOBuffer resp_buffer;
+ TSIOBufferReader resp_reader;
+
+ int output_bytes;
+ int fd;
+ struct stat stat_buf;
+} AcmeState;
+
+
+inline static AcmeState *
+make_acme_state()
+{
+ AcmeState *state = (AcmeState *)TSmalloc(sizeof(AcmeState));
+
+ memset(state, 0, sizeof(AcmeState));
+ state->fd = -1;
+
+ return state;
+}
+
+/* Create a safe pathname to the proof-type file, the destination must be
sufficiently large. */
+static int
--- End diff --
Better to return ``ssize_t`` here to indicate a length or error.
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