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[gapil.git] / sources / mygetaddr.c

diff --git a/sources/mygetaddr.c b/sources/mygetaddr.c
index ca01d74d6a9d951d6ea5c55e44e491d687ae94a6..c34d15dad4d51cd264d8fc0064271706c5357ecd 100644 (file)
--- a/sources/mygetaddr.c
+++ b/sources/mygetaddr.c
@@ -18,29 +18,27 @@
  */
 /*****************************************************************************
  *
- * File mygetaddr.c: An example host command
+ * File mygetaddr.c: An example for getaddrinfo program
  *
  * Author: S. Piccardi Nov. 2004
  *
- * $Id$
- *
  *****************************************************************************/
-#include <netdb.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <stdlib.h>        /* C standard library */
-#include <stdio.h>         /* I/O standard library */
-#include <unistd.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
+#include <string.h>      /* C strings library */
+#include <sys/types.h>   /* primitive system data types */
+#include <sys/stat.h>    /* file characteristics constants and functions */
+#include <unistd.h>      /* unix standard library */
+#include <stdlib.h>      /* C standard library */
+#include <stdio.h>       /* standard I/O library */
+#include <arpa/inet.h>   /* IP addresses conversion utilities */
+#include <sys/socket.h>  /* socket constants, types and functions */
+#include <netinet/in.h>  /* IPv4 and IPv6 constants and types */
+#include <netdb.h>       /* C resolver library */
 
 #include "Gapil.h"
 /*
- * Program myhost
+ * Program mygetaddr
  *
- * Use gethostbyname and print results
+ * Use getaddrinfo and print results
  */
 /* Help printing routine */
 void usage(void);
@@ -174,7 +172,7 @@ int main(int argc, char *argv[])
                               buffer, sizeof(buffer));
        } else if (ptr->ai_family == PF_INET6) {      /* if IPv6 */
            printf("IPv6 address: \n");
-           addr6 = (struct sockaddr_in *) ptr->ai_addr;         /* address */
+           addr6 = (struct sockaddr_in6 *) ptr->ai_addr;        /* address */
            port = ntohs(addr6->sin6_port);                      /* port */
            string = inet_ntop(addr6->sin6_family, &addr6->sin6_addr, 
                               buffer, sizeof(buffer));
@@ -193,9 +191,9 @@ int main(int argc, char *argv[])
  * routine to print usage info and exit
  */
 void usage(void) {
-    printf("Program mygethost: do an hostname resolution \n");
+    printf("Program mygetaddr: do an hostname resolution \n");
     printf("Usage:\n");
-    printf("mygethost [-h] [-p protocol] [-t socktype] hostname service\n");
+    printf("mygetaddr [-h] [-p protocol] [-t socktype] hostname service\n");
     printf("  -h              print this help\n");
     printf("  -p udp,tcp      select a protocol\n");
     printf("  -t dgram,stream select a socket type\n");