Refactor XDR code, add support for fixed-length opaque data.

1 files changed, 111 insertions, 0 deletions

diff --git a/tests/test-xdr.c b/tests/test-xdr.c
new file mode 100644
index 0000000..eedf48d
--- /dev/null
+++ b/tests/test-xdr.c
@@ -0,0 +1,111 @@
+/*
+ * xdr.c
+ * -----
+ * Serialization/deserialization routines, using XDR (RFC 4506) encoding.
+ * These functions are not part of the public libhal API.
+ *
+ * Copyright (c) 2016-2018, NORDUnet A/S All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stddef.h>		/* ptrdiff_t */
+#include <string.h>             /* memcpy, memset */
+
+#include "hal.h"
+#include "hal_internal.h"	/* htonl/ntohl */
+#include "xdr_internal.h"
+
+static void hexdump(uint8_t *buf, uint32_t len)
+{
+    for (uint32_t i = 0; i < len; ++i)
+        printf("%02x%c", buf[i], ((i & 0x07) == 0x07) ? '\n' : ' ');
+    if ((len & 0x07) != 0)
+        printf("\n");
+}
+
+int main(int argc, char *argv[])
+{
+    uint32_t i;
+    uint8_t buf[256] = {0};
+    uint8_t *bufptr = buf;
+    const uint8_t *readptr;
+    uint8_t *limit = buf + sizeof(buf);
+    hal_error_t ret;
+    uint8_t alphabet[] = "abcdefghijklmnopqrstuvwxyz";
+    uint8_t readbuf[256] = {0};
+
+    printf("hal_xdr_encode_int: work to failure\n");
+    for (i = 1; i < 100; ++i) {
+        if ((ret = hal_xdr_encode_int(&bufptr, limit, i)) != HAL_OK) {
+            printf("%d: %s\n", i, hal_error_string(ret));
+            break;
+        }
+    }
+    hexdump(buf, ((uint8_t *)bufptr - buf));
+
+    printf("\nhal_xdr_decode_int:\n");
+    readptr = buf;
+    while (readptr < bufptr) {
+        if ((ret = hal_xdr_decode_int(&readptr, limit, &i)) != HAL_OK) {
+            printf("%s\n", hal_error_string(ret));
+            break;
+        }
+        printf("%u ", i);
+    }
+    printf("\n");
+
+    printf("\nhal_xdr_encode_variable_opaque: work to failure\n");
+    memset(buf, 0, sizeof(buf));
+    bufptr = buf;
+     for (i = 1; ; ++i) {
+        if ((ret = hal_xdr_encode_variable_opaque(&bufptr, limit, alphabet, i)) != HAL_OK) {
+            printf("%d: %s\n", i, hal_error_string(ret));
+            break;
+        }
+    }
+    hexdump(buf, ((uint8_t *)bufptr - buf));
+
+    printf("\nhal_xdr_decode_variable_opaque:\n");
+    readptr = buf;
+    while (readptr < bufptr) {
+        size_t len = bufptr - readptr;
+        if ((ret = hal_xdr_decode_variable_opaque(&readptr, limit, readbuf, &len)) != HAL_OK) {
+            printf("%s\n", hal_error_string(ret));
+            break;
+        }
+        printf("%lu: ", len);
+        for (size_t j = 0; j < len; ++j)
+            putchar(readbuf[j]);
+        putchar('\n');
+        memset(readbuf, 0, sizeof(readbuf));
+    }
+
+    return 0;
+}