Move lib to the root.

[libradsec.git] / examples / blocking.c

diff --git a/examples/blocking.c b/examples/blocking.c
new file mode 100644 (file)
index 0000000..b66eb64
--- /dev/null
+++ b/examples/blocking.c
@@ -0,0 +1,71 @@
+/* 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_handle *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);
+
+  /* Read the rest of the message.  */
+  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_handle *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;
+}