From 23dfea91ef5e921da0b09d91004436a7d8715c42 Mon Sep 17 00:00:00 2001
From: Linus Nordberg <linus@nordu.net>
Date: Mon, 13 Sep 2010 17:27:40 +0200
Subject: First stab at a working blocking example.

---
 lib/examples/blocking.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 lib/examples/blocking.c

(limited to 'lib/examples/blocking.c')

diff --git a/lib/examples/blocking.c b/lib/examples/blocking.c
new file mode 100644
index 0000000..f72eab4
--- /dev/null
+++ b/lib/examples/blocking.c
@@ -0,0 +1,69 @@
+/* Example usage of libradsec-base, using blocking i/o.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include "blocking.h"
+
+struct rs_packet *
+next_packet (const struct rs_config *ctx, int fd)
+{
+  uint8_t hdr[RS_HEADER_LEN];
+  uint8_t *buf;
+  size_t len;
+  struct rs_packet *p;
+  ssize_t n;
+
+  /* Read fixed length header.  */
+  n = 0;
+  while (n < RS_HEADER_LEN)
+    n += read (fd, hdr, RS_HEADER_LEN - n);
+
+  p = rs_packet_new (ctx, hdr, &len);
+  fprintf (stderr, "DEBUG: got header, total packet len is %d\n",
+	   len + RS_HEADER_LEN);
+  if (p)
+    {
+      buf = malloc (len);
+      if (buf)
+	{
+	  n = 0;
+	  while (n < len)
+	    n += read (fd, buf, len - n);
+	  p = rs_packet_parse (ctx, &p, buf, len);
+	  free (buf);
+	}
+      else
+	rs_packet_free (ctx, &p);
+    }
+
+  return p;
+}
+
+int
+send_packet(const struct rs_config *ctx, int fd, struct rs_packet *p)
+{
+  uint8_t *buf = NULL;
+  ssize_t n = -20;	      /* Arbitrary packet size -- a guess.  */
+
+  while (n < 0)
+    {
+      buf = realloc (buf, -n);
+      if (buf == NULL)
+	return -1;
+      n = rs_packet_serialize (p, buf, -n);
+    }
+
+  while (n)
+    {
+      ssize_t count = write (fd, buf, n);
+      if (count == -1)
+	return -1;
+      n -= count;
+    }
+
+  free (buf);
+  rs_packet_free (ctx, &p);
+  return 0;
+}
-- 
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