From 7e170c34b02269faa8a083cb57a2f567af634828 Mon Sep 17 00:00:00 2001
From: Stéphane Raimbault <stephane.raimbault@gmail.com>
Date: Sun, 15 Jan 2012 23:12:29 +0100
Subject: [PATCH] Return -1 on getaddrinfo error and print error in debug mode

---
 src/modbus-tcp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/modbus-tcp.c b/src/modbus-tcp.c
index 59e8cd2..c92f08f 100644
--- a/src/modbus-tcp.c
+++ b/src/modbus-tcp.c
@@ -342,8 +342,12 @@ static int _modbus_tcp_pi_connect(modbus_t *ctx)
     ai_list = NULL;
     rc = getaddrinfo(ctx_tcp_pi->node, ctx_tcp_pi->service,
                      &ai_hints, &ai_list);
-    if (rc != 0)
-        return rc;
+    if (rc != 0) {
+        if (ctx->debug) {
+            printf("Error returned by getaddrinfo: %d\n", rc);
+        }
+        return -1;
+    }
 
     for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) {
         int flags = ai_ptr->ai_socktype;
--
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