From a2ef22d59904d5e53c3d58093b561fa1ab7127a6 Mon Sep 17 00:00:00 2001
From: Nils Philippsen <nils@redhat.com>
Date: Thu, 16 Aug 2012 10:58:54 +0200
Subject: [PATCH] patch: ipv6

Squashed commit of the following:

commit 9f9d5c46fdef5ba7baccb81ab8170cfc24797de6
Author: Nils Philippsen <nils@redhat.com>
Date:   Fri Nov 19 12:27:42 2010 +0100

    support IPv6 (#198422)
---
 src/xsane-save.c | 96 ++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 62 insertions(+), 34 deletions(-)

diff --git a/src/xsane-save.c b/src/xsane-save.c
index 84f5d59..87ef685 100644
--- a/src/xsane-save.c
+++ b/src/xsane-save.c
@@ -29,6 +29,8 @@
 #include <time.h>
 #include <sys/wait.h> 
 
+#include <glib.h>
+
 /* the following test is always false */
 #ifdef _native_WIN32
 # include <winsock.h>
@@ -7488,55 +7490,81 @@ void write_email_attach_file(int fd_socket, char *boundary, FILE *infile, char *
 /* returns fd_socket if sucessfull, < 0 when error occured */
 int open_socket(char *server, int port)
 {
- int fd_socket;
- struct sockaddr_in sin;
- struct hostent *he;
+ int fd_socket, e;
+
+ struct addrinfo *ai_list, *ai;
+ struct addrinfo hints;
+ gchar *port_s;
+ gint connected;
+
+  memset(&hints, '\0', sizeof(hints));
+  hints.ai_flags = AI_ADDRCONFIG;
+  hints.ai_socktype = SOCK_STREAM;
+
+  port_s = g_strdup_printf("%d", port);
+  e = getaddrinfo(server, port_s, &hints, &ai_list);
+  g_free(port_s);
 
-  he = gethostbyname(server);
-  if (!he)
+  if (e != 0)
   {
-    DBG(DBG_error, "open_socket: Could not get hostname of \"%s\"\n", server);
+    DBG(DBG_error, "open_socket: Could not lookup \"%s\"\n", server);
    return -1;
   }
-  else
+
+  connected = 0;
+  for (ai = ai_list; ai != NULL && !connected; ai = ai->ai_next)
   {
-    DBG(DBG_info, "open_socket: connecting to \"%s\" = %d.%d.%d.%d\n",
-        he->h_name,
-        (unsigned char) he->h_addr_list[0][0],
-        (unsigned char) he->h_addr_list[0][1],
-        (unsigned char) he->h_addr_list[0][2],
-        (unsigned char) he->h_addr_list[0][3]);
-  }
+    gchar hostname[NI_MAXHOST];
+    gchar hostaddr[NI_MAXHOST];
+
+    /* If all else fails */
+    strncpy(hostname, "(unknown name)", NI_MAXHOST-1);
+    strncpy(hostaddr, "(unknown address)", NI_MAXHOST-1);
+
+    /* Determine canonical name and IPv4/IPv6 address */
+    (void) getnameinfo(ai->ai_addr, ai->ai_addrlen, hostname, sizeof(hostname),
+                       NULL, 0, 0);
+    (void) getnameinfo(ai->ai_addr, ai->ai_addrlen, hostaddr, sizeof(hostaddr),
+                       NULL, 0, NI_NUMERICHOST);
+
+    DBG(DBG_info, "open_socket: connecting to \"%s\" (\"%s\"): %s\n",
+        server, hostname, hostaddr);
  
-  if (he->h_addrtype != AF_INET)
-  {
-    DBG(DBG_error, "open_socket: Unknown address family: %d\n", he->h_addrtype);
-   return -1;
-  }
+    if ((ai->ai_family != AF_INET) && (ai->ai_family != AF_INET6))
+    {
+      DBG(DBG_error, "open_socket: Unknown address family: %d\n", ai->ai_family);
+      continue;
+    }
 
-  fd_socket = socket(AF_INET, SOCK_STREAM, 0);
+    fd_socket = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 
-  if (fd_socket < 0)
-  {
-    DBG(DBG_error, "open_socket: Could not create socket: %s\n", strerror(errno));
-   return -1;
-  }
+    if (fd_socket < 0)
+    {
+      DBG(DBG_error, "open_socket: Could not create socket: %s\n", strerror(errno));
+      continue;
+    }
 
-/*  setsockopt (dev->ctl, level, TCP_NODELAY, &on, sizeof (on)); */
+    /*  setsockopt (dev->ctl, level, TCP_NODELAY, &on, sizeof (on)); */
 
-  sin.sin_port = htons(port);
-  sin.sin_family = AF_INET;
-  memcpy(&sin.sin_addr, he->h_addr_list[0], he->h_length);
+    if (connect(fd_socket, ai->ai_addr, ai->ai_addrlen) != 0)
+    {
+      DBG(DBG_error, "open_socket: Could not connect with port %d of socket: %s\n", port, strerror(errno));
+      continue;
+    }
+
+    /* All went well */
+    connected = 1;
+  }
 
-  if (connect(fd_socket, &sin, sizeof(sin)))
+  if (!connected)
   {
-    DBG(DBG_error, "open_socket: Could not connect with port %d of socket: %s\n", ntohs(sin.sin_port), strerror(errno));
-   return -1;
+    DBG(DBG_info, "open_socket: Could not connect to any address");
+    return -1;
   }
 
-  DBG(DBG_info, "open_socket: Connected with port %d\n", ntohs(sin.sin_port));
+  DBG(DBG_info, "open_socket: Connected with port %d\n", port);
 
- return fd_socket;
+  return fd_socket;
 }
 
 /* ---------------------------------------------------------------------------------------------------------------------- */
-- 
1.7.11.4