From dc2fb5835ed3fd66a919ff94b5d11c99b832ff0d Mon Sep 17 00:00:00 2001
From: kouril <kouril>
Date: Thu, 17 Feb 2005 12:43:34 +0000
Subject: [PATCH] Added a debug program that performs conversions from DNS
 names to realms. (Thanks to Jari Ahonen for it).

---
 src/krbhostname.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/krbhostname.c

diff --git a/src/krbhostname.c b/src/krbhostname.c
new file mode 100644
index 0000000..13f8edb
--- /dev/null
+++ b/src/krbhostname.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN  64
+#endif
+
+int main(int argc, char **argv)
+{
+    struct addrinfo *ai, hints;
+    char *hostname;
+    char localname[MAXHOSTNAMELEN];
+    char hnamebuf[NI_MAXHOST];
+
+    if(gethostname(localname, MAXHOSTNAMELEN)) {
+        return 1;
+    }
+    printf("gethostname() returns \"%s\"\n", localname);
+
+    if(argc == 2) {
+        hostname = argv[1];
+    } else {
+        hostname = localname;
+    }
+    printf("Using \"%s\" as service host name\n", hostname);
+
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_INET;
+    if(getaddrinfo(hostname, NULL, &hints, &ai)) {
+        printf("getaddrinfo() failed\n");
+        return 1;
+    }
+
+    if(ai->ai_canonname) {
+        hostname = strdup(ai->ai_canonname);
+        printf("Canonical hostname from getaddrinfo() is \"%s\"\n", hostname);
+    }
+    
+    if(getnameinfo(ai->ai_addr, ai->ai_addrlen, hnamebuf, sizeof(hnamebuf),
+        NULL, 0, NI_NAMEREQD)) {
+        printf("getnameinfo() failed\n");
+        return 1;
+    }
+
+    printf("Hostname from getnameinfo() is \"%s\"\n", hnamebuf);
+
+    freeaddrinfo(ai);
+    return 0;
+}
-- 
2.1.4