Initial checkin

1 files changed, 156 insertions, 0 deletions

diff --git a/ftpfs/host.c b/ftpfs/host.c
new file mode 100644
index 00000000..e46a56fa
--- /dev/null
+++ b/ftpfs/host.c
@@ -0,0 +1,156 @@
+/* Server lookup
+
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <netdb.h>
+#include <ftpconn.h>
+
+/* Split the server-specification string SERVER into its components: a
+   hostname (returned in HOST), username (USER), and password (PASSWD).  */
+static error_t
+split_server_name (const char *server, char **host, char **user, char **passwd)
+{
+  size_t plim;
+  const char *p = server, *sep;
+
+  *host = 0;
+  *user = 0;
+  *passwd = 0;
+
+  /* Extract the hostname; syntax is either `HOST:...', `...@HOST', or just
+     HOST if there are no user parameters specified.  */
+  sep = strchr (p, '@');
+  if (sep)
+    /* ...@HOST */
+    {
+      *host = strdup (sep + 1);
+      if (! *host)
+	return ENOMEM;
+      plim = sep - server;
+    }
+  else
+    {
+      sep = strchr (server, ':');
+      if (sep)
+	/* HOST:... */
+	{
+	  *host = strndup (server, sep - server);
+	  if (! *host)
+	    return ENOMEM;
+	  p = sep + 1;
+	  plim = strlen (p);
+	}
+      else
+	/* Just HOST */
+	{
+	  *host = strdup (server);
+	  if (! *host)
+	    return ENOMEM;
+	  return 0;
+	}
+    }
+
+  /* Now P...P+PLIM contains any user parameters for HOST.  */
+#if 0				/* XXX don't do passwords */
+  sep = memchr (p, ':', plim);
+  if (sep)
+    /* USERNAME:PASSWD */
+    {
+      *user = strndup (p, sep - p);
+      *passwd = strndup (sep + 1, plim - (sep + 1 - p));
+      if (!*user || !*passwd)
+	{
+	  if (*user)
+	    free (*user);
+	  if (*passwd)
+	    free (*passd);
+	  free (*host);
+	  return ENOMEM;
+	}
+    }
+  else
+#endif
+    /* Just USERNAME */
+    {
+      *user = strndup (p, plim);
+      if (! *user)
+	free (*user);
+    }
+
+  return 0;
+}
+
+/*  */
+error_t
+lookup_server (const char *server, struct ftp_conn_params **params, int *h_err)
+{
+  char hostent_data[2048];	/* XXX what size should this be???? */
+  struct hostent _he, *he;
+  char *host, *user, *passwd;
+  error_t err = split_server_name (server, &host, &user, &passwd);
+
+  if (err)
+    return err;
+
+  /* We didn't find a pre-existing host entry.  Make a new one.  Note that
+     since we don't lock anything while making up our new structure, another
+     thread could have inserted a duplicate entry for the same host name, but
+     this isn't really a problem, just annoying.  */
+
+  if (gethostbyname_r (host, &_he, hostent_data, sizeof hostent_data,
+		       &he, h_err) == 0)
+    {
+      *params = malloc (sizeof (struct ftp_conn_params));
+      if (! *params)
+	err = ENOMEM;
+      else
+	{
+	  (*params)->addr = malloc (he->h_length);
+	  if (! (*params)->addr)
+	    {
+	      free (*params);
+	      err = ENOMEM;
+	    }
+	  else
+	    {
+	      bcopy (he->h_addr_list[0], (*params)->addr, he->h_length);
+	      (*params)->addr_len = he->h_length;
+	      (*params)->addr_type = he->h_addrtype;
+	      (*params)->user = user;
+	      (*params)->pass = passwd;
+	      (*params)->acct = 0;
+	    }
+	}
+    }
+  else
+    err = EINVAL;
+
+  free (host);
+
+  if (err)
+    {
+      free (user);
+      free (passwd);
+    }
+
+  return err;
+}