From c8d9d4d92ba1e86253efa711a81097ddeb8dc9d5 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@leeloo.home.verplant.org>
Date: Sun, 22 Jun 2008 14:20:32 +0200
Subject: [PATCH] src/librrdc.c: rrdd_connect: Allow connecting to arbitrary
 addresses.

UNIX domain sockets are handled specially, because getaddrinfo(3) doesn't
now how to handle them.
---
 src/librrdc.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 76 insertions(+), 1 deletion(-)

diff --git a/src/librrdc.c b/src/librrdc.c
index 93d9420..0e2281d 100644
--- a/src/librrdc.c
+++ b/src/librrdc.c
@@ -58,7 +58,7 @@ static int buffer_add_value (const char *value,
   return (buffer_add_string (temp, buffer_ret, buffer_size_ret));
 } /* int buffer_add_value */
 
-int rrdd_connect (const char *path)
+static int rrdd_connect_unix (const char *path)
 {
   struct sockaddr_un sa;
   int status;
@@ -107,6 +107,81 @@ int rrdd_connect (const char *path)
   pthread_mutex_unlock (&lock);
 
   return (0);
+} /* int rrdd_connect_unix */
+
+int rrdd_connect (const char *addr)
+{
+  struct addrinfo ai_hints;
+  struct addrinfo *ai_res;
+  struct addrinfo *ai_ptr;
+  int status;
+
+  if (addr == NULL)
+    addr = RRDD_SOCK_PATH;
+
+  if (strncmp ("unix:", addr, strlen ("unix:")) == 0)
+    return (rrdd_connect_unix (addr + strlen ("unix:")));
+  else if (addr[0] == '/')
+    return (rrdd_connect_unix (addr));
+
+  pthread_mutex_lock (&lock);
+
+  if (sh != NULL)
+  {
+    pthread_mutex_unlock (&lock);
+    return (0);
+  }
+
+  memset (&ai_hints, 0, sizeof (ai_hints));
+  ai_hints.ai_flags = 0;
+#ifdef AI_ADDRCONFIG
+  ai_hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+  ai_hints.ai_family = AF_UNSPEC;
+  ai_hints.ai_socktype = SOCK_STREAM;
+
+  ai_res = NULL;
+  status = getaddrinfo (addr, DEFAULT_PORT, &ai_hints, &ai_res);
+  if (status != 0)
+  {
+    pthread_mutex_unlock (&lock);
+    return (status);
+  }
+
+  for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
+  {
+    sd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
+    if (sd < 0)
+    {
+      status = errno;
+      sd = -1;
+      continue;
+    }
+
+    status = connect (sd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
+    if (status != 0)
+    {
+      status = errno;
+      close (sd);
+      sd = -1;
+      continue;
+    }
+
+    sh = fdopen (sd, "w+");
+    if (sh == NULL)
+    {
+      status = errno;
+      close (sd);
+      sd = -1;
+      continue;
+    } 
+
+    assert (status == 0);
+    break;
+  } /* for (ai_ptr) */
+  pthread_mutex_unlock (&lock);
+
+  return (status);
 } /* int rrdd_connect */
 
 int rrdd_disconnect (void)
-- 
2.11.0