Imported Upstream version 2.3_rc1

1 files changed, 0 insertions, 711 deletions

diff --git a/pf.c b/pf.c
deleted file mode 100644
index 6b4cba4..0000000
--- a/pf.c
+++ /dev/null
@@ -1,711 +0,0 @@
-/*
- *  OpenVPN -- An application to securely tunnel IP networks
- *             over a single TCP/UDP port, with support for SSL/TLS-based
- *             session authentication and key exchange,
- *             packet encryption, packet authentication, and
- *             packet compression.
- *
- *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program 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 (see the file COPYING included with this
- *  distribution); if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-/* packet filter functions */
-
-#include "syshead.h"
-
-#if defined(ENABLE_PF)
-
-#include "init.h"
-
-#include "memdbg.h"
-
-#include "pf-inline.h"
-
-static void
-pf_destroy (struct pf_set *pfs)
-{
-  if (pfs)
-    {
-      if (pfs->cns.hash_table)
-	hash_free (pfs->cns.hash_table);
-
-      {
-	struct pf_cn_elem *l = pfs->cns.list;
-	while (l)
-	  {
-	    struct pf_cn_elem *next = l->next;
-	    free (l->rule.cn);
-	    free (l);
-	    l = next;
-	  }
-      }
-      {
-	struct pf_subnet *l = pfs->sns.list;
-	while (l)
-	  {
-	    struct pf_subnet *next = l->next;
-	    free (l);
-	    l = next;
-	  }
-      }
-      free (pfs);
-    }
-}
-
-static bool
-add_client (const char *line, const char *prefix, const int line_num, struct pf_cn_elem ***next, const bool exclude)
-{
-  struct pf_cn_elem *e;
-  ALLOC_OBJ_CLEAR (e, struct pf_cn_elem);
-  e->rule.exclude = exclude;
-  e->rule.cn = string_alloc (line, NULL);
-  **next = e;
-  *next = &e->next;
-  return true;
-}
-
-static bool
-add_subnet (const char *line, const char *prefix, const int line_num, struct pf_subnet ***next, const bool exclude)
-{
-  struct in_addr network;
-  in_addr_t netmask = 0;
-
-  if (strcmp (line, "unknown"))
-    {
-      int netbits = 32;
-      char *div = strchr (line, '/');
-
-      if (div)
-	{
-	  *div++ = '\0';
-	  if (sscanf (div, "%d", &netbits) != 1)
-	    {
-	      msg (D_PF_INFO, "PF: %s/%d: bad '/n' subnet specifier: '%s'", prefix, line_num, div);
-	      return false;
-	    }
-	  if (netbits < 0 || netbits > 32)
-	    {
-	      msg (D_PF_INFO, "PF: %s/%d: bad '/n' subnet specifier: must be between 0 and 32: '%s'", prefix, line_num, div);
-	      return false;
-	    }
-	}
-
-      if (openvpn_inet_aton (line, &network) != OIA_IP)
-	{
-	  msg (D_PF_INFO, "PF: %s/%d: bad network address: '%s'", prefix, line_num, line);
-	  return false;
-	}
-      netmask = netbits_to_netmask (netbits);
-      if ((network.s_addr & htonl (netmask)) != network.s_addr)
-        {
-          network.s_addr &= htonl (netmask);
-          msg (M_WARN, "WARNING: PF: %s/%d: incorrect subnet %s/%d changed to %s/%d", prefix, line_num, line, netbits, inet_ntoa (network), netbits);
-        }
-    }
-  else
-    {
-      /* match special "unknown" tag for addresses unrecognized by mroute */
-      network.s_addr = htonl(0);
-      netmask = ~0;
-    }
-
-  {
-    struct pf_subnet *e;
-    ALLOC_OBJ_CLEAR (e, struct pf_subnet);
-    e->rule.exclude = exclude;
-    e->rule.network = ntohl (network.s_addr);
-    e->rule.netmask = netmask;
-    **next = e;
-    *next = &e->next;
-    return true;
-  }
-}
-
-static uint32_t
-cn_hash_function (const void *key, uint32_t iv)
-{
-  return hash_func ((uint8_t *)key, strlen ((char *)key) + 1, iv);
-}
-
-static bool
-cn_compare_function (const void *key1, const void *key2)
-{
-  return !strcmp((const char *)key1, (const char *)key2);
-}
-
-static bool
-genhash (struct pf_cn_set *cns, const char *prefix, const int n_clients)
-{
-  struct pf_cn_elem *e;
-  bool status = true;
-  int n_buckets = n_clients;
-
-  if (n_buckets < 16)
-    n_buckets = 16;
-  cns->hash_table = hash_init (n_buckets, 0, cn_hash_function, cn_compare_function);
-  for (e = cns->list; e != NULL; e = e->next)
-    {
-      if (!hash_add (cns->hash_table, e->rule.cn, &e->rule, false))
-	{
-	  msg (D_PF_INFO, "PF: %s: duplicate common name in [clients] section: '%s'", prefix, e->rule.cn);
-	  status = false;
-	}
-    }
-  
-  return status;
-}
-
-static struct pf_set *
-pf_init (const struct buffer_list *bl, const char *prefix, const bool allow_kill)
-{
-# define MODE_UNDEF   0
-# define MODE_CLIENTS 1
-# define MODE_SUBNETS 2
-  int mode = MODE_UNDEF;
-  int line_num = 0;
-  int n_clients = 0;
-  int n_subnets = 0;
-  int n_errors = 0;
-  struct pf_set *pfs = NULL;
-  char line[PF_MAX_LINE_LEN];
-
-  ALLOC_OBJ_CLEAR (pfs, struct pf_set);
-  if (bl)
-    {
-      struct pf_cn_elem **cl = &pfs->cns.list;
-      struct pf_subnet **sl = &pfs->sns.list;
-      struct buffer_entry *be;
-
-      for (be = bl->head; be != NULL; be = be->next)
-	{
-	  ++line_num;
-	  strncpynt (line, BSTR(&be->buf), sizeof(line));
-	  rm_trailing_chars (line, "\r\n\t ");
-	  if (line[0] == '\0' || line[0] == '#')
-	    ;
-	  else if (line[0] == '+' || line[0] == '-')
-	    {
-	      bool exclude = (line[0] == '-');
-
-	      if (line[1] =='\0')
-		{
-		  msg (D_PF_INFO, "PF: %s/%d: no data after +/-: '%s'", prefix, line_num, line);
-		  ++n_errors;
-		}
-	      else if (mode == MODE_CLIENTS)
-		{
-		  if (add_client (&line[1], prefix, line_num, &cl, exclude))
-		    ++n_clients;
-		  else
-		    ++n_errors;
-		}
-	      else if (mode == MODE_SUBNETS)
-		{
-		  if (add_subnet (&line[1], prefix, line_num, &sl, exclude))
-		    ++n_subnets;
-		  else
-		    ++n_errors;
-		}
-	      else if (mode == MODE_UNDEF)
-		;
-	      else
-		{
-		  ASSERT (0);
-		}
-	    }
-	  else if (line[0] == '[')
-	    {
-	      if (!strcasecmp (line, "[clients accept]"))
-		{
-		  mode = MODE_CLIENTS;
-		  pfs->cns.default_allow = true;
-		}
-	      else if (!strcasecmp (line, "[clients drop]"))
-		{
-		  mode = MODE_CLIENTS;
-		  pfs->cns.default_allow = false;
-		}
-	      else if (!strcasecmp (line, "[subnets accept]"))
-		{
-		  mode = MODE_SUBNETS;
-		  pfs->sns.default_allow = true;
-		}
-	      else if (!strcasecmp (line, "[subnets drop]"))
-		{
-		  mode = MODE_SUBNETS;
-		  pfs->sns.default_allow = false;
-		}
-	      else if (!strcasecmp (line, "[end]"))
-		goto done;
-	      else if (allow_kill && !strcasecmp (line, "[kill]"))
-		goto kill;
-	      else
-		{
-		  mode = MODE_UNDEF;
-		  msg (D_PF_INFO, "PF: %s/%d unknown tag: '%s'", prefix, line_num, line);
-		  ++n_errors;
-		}
-	    }
-	  else
-	    {
-	      msg (D_PF_INFO, "PF: %s/%d line must begin with '+', '-', or '[' : '%s'", prefix, line_num, line);
-	      ++n_errors;
-	    }
-	}
-      ++n_errors;
-      msg (D_PF_INFO, "PF: %s: missing [end]", prefix);
-    }
-  else
-    {
-      msg (D_PF_INFO, "PF: %s: cannot open", prefix);
-      ++n_errors;
-    }
-
- done:
-  if (bl)
-    {
-      if (!n_errors)
-	{
-	  if (!genhash (&pfs->cns, prefix, n_clients))
-	    ++n_errors;
-	}
-      if (n_errors)
-	msg (D_PF_INFO, "PF: %s rejected due to %d error(s)", prefix, n_errors);
-    }
-  if (n_errors)
-    {
-      pf_destroy (pfs);
-      pfs = NULL;
-    }
-  return pfs;
-  
- kill:
-  pf_destroy (pfs);
-  ALLOC_OBJ_CLEAR (pfs, struct pf_set);
-  pfs->kill = true;
-  return pfs;
-}
-
-#ifdef PLUGIN_PF
-static struct pf_set *
-pf_init_from_file (const char *fn)
-{
-  struct buffer_list *bl = buffer_list_file (fn, PF_MAX_LINE_LEN);
-  if (bl)
-    {
-      struct pf_set *pfs = pf_init (bl, fn, true);
-      buffer_list_free (bl);
-      return pfs;
-    }
-  else
-    {
-      msg (D_PF_INFO|M_ERRNO, "PF: %s: cannot open", fn);
-      return NULL;
-    }
-}
-#endif
-
-#ifdef ENABLE_DEBUG
-
-static const char *
-drop_accept (const bool accept)
-{
-  return accept ? "ACCEPT" : "DROP"; 
-}
-
-static const char *
-pct_name (const int type)
-{
-  switch (type)
-    {
-    case PCT_SRC:
-      return "SRC";
-    case PCT_DEST:
-      return "DEST";
-    default:
-      return "???";
-    }
-}
-
-static void
-pf_cn_test_print (const char *prefix,
-		  const int type,
-		  const char *prefix2,
-		  const char *cn,
-		  const bool allow,
-		  const struct pf_cn *rule)
-{
-  if (rule)
-    {
-      dmsg (D_PF_DEBUG, "PF: %s/%s/%s %s %s rule=[%s %s]",
-	   prefix, prefix2, pct_name (type),
-	   cn, drop_accept (allow),
-	   rule->cn, drop_accept (!rule->exclude));
-    }
-  else
-    {
-      dmsg (D_PF_DEBUG, "PF: %s/%s/%s %s %s",
-	   prefix, prefix2, pct_name (type),
-	   cn, drop_accept (allow));
-    }
-}
-
-static void
-pf_addr_test_print (const char *prefix,
-		    const char *prefix2,
-		    const struct context *src,
-		    const struct mroute_addr *dest,
-		    const bool allow,
-		    const struct ipv4_subnet *rule)
-{
-  struct gc_arena gc = gc_new ();
-  if (rule)
-    {
-      dmsg (D_PF_DEBUG, "PF: %s/%s %s %s %s rule=[%s/%s %s]",
-	   prefix,
-	   prefix2,
-	   tls_common_name (src->c2.tls_multi, false),
-	   mroute_addr_print_ex (dest, MAPF_SHOW_ARP, &gc),
-	   drop_accept (allow),
-	   print_in_addr_t (rule->network, 0, &gc),
-	   print_in_addr_t (rule->netmask, 0, &gc),
-	   drop_accept (!rule->exclude));
-    }
-  else
-    {
-      dmsg (D_PF_DEBUG, "PF: %s/%s %s %s %s",
-	   prefix,
-	   prefix2,
-	   tls_common_name (src->c2.tls_multi, false),
-	   mroute_addr_print_ex (dest, MAPF_SHOW_ARP, &gc),
-	   drop_accept (allow));
-    }
-  gc_free (&gc);
-}
-
-#endif
-
-static inline struct pf_cn *
-lookup_cn_rule (struct hash *h, const char *cn, const uint32_t cn_hash)
-{
-  struct hash_element *he = hash_lookup_fast (h, hash_bucket (h, cn_hash), cn, cn_hash);
-  if (he)
-    return (struct pf_cn *) he->value;
-  else
-    return NULL;
-}
-
-bool
-pf_cn_test (struct pf_set *pfs, const struct tls_multi *tm, const int type, const char *prefix)
-{
-  if (!pfs->kill)
-    {
-      const char *cn;
-      uint32_t cn_hash;
-      if (tls_common_name_hash (tm, &cn, &cn_hash))
-	{
-	  const struct pf_cn *rule = lookup_cn_rule (pfs->cns.hash_table, cn, cn_hash);
-	  if (rule)
-	    {
-#ifdef ENABLE_DEBUG
-	      if (check_debug_level (D_PF_DEBUG))
-		pf_cn_test_print ("PF_CN_MATCH", type, prefix, cn, !rule->exclude, rule);
-#endif
-	      if (!rule->exclude)
-		return true;
-	      else
-		return false;
-	    }
-	  else
-	    {
-#ifdef ENABLE_DEBUG
-	      if (check_debug_level (D_PF_DEBUG))
-		pf_cn_test_print ("PF_CN_DEFAULT", type, prefix, cn, pfs->cns.default_allow, NULL);
-#endif
-	      if (pfs->cns.default_allow)
-		return true;
-	      else
-		return false;
-	    }
-	}
-    }
-#ifdef ENABLE_DEBUG
-  if (check_debug_level (D_PF_DEBUG))
-    pf_cn_test_print ("PF_CN_FAULT", type, prefix, tls_common_name (tm, false), false, NULL);
-#endif
-  return false;
-}
-
-bool
-pf_addr_test_dowork (const struct context *src, const struct mroute_addr *dest, const char *prefix)
-{
-  struct pf_set *pfs = src->c2.pf.pfs;
-  if (pfs && !pfs->kill)
-    {
-      const in_addr_t addr = in_addr_t_from_mroute_addr (dest);
-      const struct pf_subnet *se = pfs->sns.list;
-      while (se)
-	{
-	  if ((addr & se->rule.netmask) == se->rule.network)
-	    {
-#ifdef ENABLE_DEBUG
-	      if (check_debug_level (D_PF_DEBUG))
-		pf_addr_test_print ("PF_ADDR_MATCH", prefix, src, dest, !se->rule.exclude, &se->rule);
-#endif
-	      return !se->rule.exclude;
-	    }
-	  se = se->next;
-	}
-#ifdef ENABLE_DEBUG
-      if (check_debug_level (D_PF_DEBUG))
-	pf_addr_test_print ("PF_ADDR_DEFAULT", prefix, src, dest, pfs->sns.default_allow, NULL);
-#endif
-      return pfs->sns.default_allow;
-    }
-  else
-    {
-#ifdef ENABLE_DEBUG
-      if (check_debug_level (D_PF_DEBUG))
-	pf_addr_test_print ("PF_ADDR_FAULT", prefix, src, dest, false, NULL);
-#endif
-      return false;
-    }
-}
-
-#ifdef PLUGIN_PF
-void
-pf_check_reload (struct context *c)
-{
-  const int slow_wakeup = 15;
-  const int fast_wakeup = 1;
-  const int wakeup_transition = 60;
-  bool reloaded = false;
-
-  if (c->c2.pf.enabled
-      && c->c2.pf.filename
-      && event_timeout_trigger (&c->c2.pf.reload, &c->c2.timeval, ETT_DEFAULT))
-    {
-      struct stat s;
-      if (!stat (c->c2.pf.filename, &s))
-	{
-	  if (s.st_mtime > c->c2.pf.file_last_mod)
-	    {
-	      struct pf_set *pfs = pf_init_from_file (c->c2.pf.filename);
-	      if (pfs)
-		{
-		  if (c->c2.pf.pfs)
-		    pf_destroy (c->c2.pf.pfs);
-		  c->c2.pf.pfs = pfs;
-		  reloaded = true;
-		  if (pf_kill_test (pfs))
-		    {
-		      c->sig->signal_received = SIGTERM;
-		      c->sig->signal_text = "pf-kill";
-		    }
-		}
-	      c->c2.pf.file_last_mod = s.st_mtime;
-	    }
-	}
-      {
-	int wakeup = slow_wakeup;
-	if (!c->c2.pf.pfs && c->c2.pf.n_check_reload < wakeup_transition)
-	  wakeup = fast_wakeup;
-	event_timeout_init (&c->c2.pf.reload, wakeup, now);
-	reset_coarse_timers (c);
-	c->c2.pf.n_check_reload++;
-      }
-    }
-#ifdef ENABLE_DEBUG
-  if (reloaded && check_debug_level (D_PF_DEBUG))
-    pf_context_print (&c->c2.pf, "pf_check_reload", D_PF_DEBUG);
-#endif
-}
-#endif
-
-#ifdef MANAGEMENT_PF
-bool
-pf_load_from_buffer_list (struct context *c, const struct buffer_list *config)
-{
-  struct pf_set *pfs = pf_init (config, "[SERVER-PF]", false);
-  if (pfs)
-    {
-      if (c->c2.pf.pfs)
-	pf_destroy (c->c2.pf.pfs);
-      c->c2.pf.pfs = pfs;
-      return true;
-    }
-  else
-    return false;
-}
-#endif
-
-void
-pf_init_context (struct context *c)
-{
-  struct gc_arena gc = gc_new ();
-#ifdef PLUGIN_PF
-  if (plugin_defined (c->plugins, OPENVPN_PLUGIN_ENABLE_PF))
-    {
-      const char *pf_file = create_temp_file (c->options.tmp_dir, "pf", &gc);
-      if( pf_file ) {
-        setenv_str (c->c2.es, "pf_file", pf_file);
-
-        if (plugin_call (c->plugins, OPENVPN_PLUGIN_ENABLE_PF, NULL, NULL, c->c2.es) == OPENVPN_PLUGIN_FUNC_SUCCESS)
-          {
-            event_timeout_init (&c->c2.pf.reload, 1, now);
-            c->c2.pf.filename = string_alloc (pf_file, NULL);
-            c->c2.pf.enabled = true;
-#ifdef ENABLE_DEBUG
-            if (check_debug_level (D_PF_DEBUG))
-              pf_context_print (&c->c2.pf, "pf_init_context#1", D_PF_DEBUG);
-#endif
-          }
-        else
-          {
-            msg (M_WARN, "WARNING: OPENVPN_PLUGIN_ENABLE_PF disabled");
-          }
-      }
-    }
-#endif
-#ifdef MANAGEMENT_PF
-  if (!c->c2.pf.enabled && management_enable_pf (management))
-    {
-      c->c2.pf.enabled = true;
-#ifdef ENABLE_DEBUG
-      if (check_debug_level (D_PF_DEBUG))
-	pf_context_print (&c->c2.pf, "pf_init_context#2", D_PF_DEBUG);
-#endif
-    }
-#endif
-  gc_free (&gc);
-}
-
-void
-pf_destroy_context (struct pf_context *pfc)
-{
-#ifdef PLUGIN_PF
-  if (pfc->filename)
-    {
-      delete_file (pfc->filename);
-      free (pfc->filename);
-    }
-#endif
-  if (pfc->pfs)
-    pf_destroy (pfc->pfs);
-}
-
-#ifdef ENABLE_DEBUG
-
-static void
-pf_subnet_set_print (const struct pf_subnet_set *s, const int lev)
-{
-  struct gc_arena gc = gc_new ();
-  if (s)
-    {
-      struct pf_subnet *e;
-
-      msg (lev, "  ----- struct pf_subnet_set -----");
-      msg (lev, "  default_allow=%s", drop_accept (s->default_allow));
-
-      for (e = s->list; e != NULL; e = e->next)
-	{
-	  msg (lev, "   %s/%s %s",
-	       print_in_addr_t (e->rule.network, 0, &gc),
-	       print_in_addr_t (e->rule.netmask, 0, &gc),
-	       drop_accept (!e->rule.exclude));
-	}
-    }
-  gc_free (&gc);
-}
-
-static void
-pf_cn_set_print (const struct pf_cn_set *s, const int lev)
-{
-  if (s)
-    {
-      struct hash_iterator hi;
-      struct hash_element *he;
-
-      msg (lev, "  ----- struct pf_cn_set -----");
-      msg (lev, "  default_allow=%s", drop_accept (s->default_allow));
-
-      if (s->hash_table)
-	{
-	  hash_iterator_init (s->hash_table, &hi);
-	  while ((he = hash_iterator_next (&hi)))
-	    {
-	      struct pf_cn *e = (struct pf_cn *)he->value;
-	      msg (lev, "   %s %s",
-		   e->cn,
-		   drop_accept (!e->exclude));
-	    }
-
-	  msg (lev, "  ----------");
-
-	  {
-	    struct pf_cn_elem *ce;
-	    for (ce = s->list; ce != NULL; ce = ce->next)
-	      {
-		struct pf_cn *e = lookup_cn_rule (s->hash_table, ce->rule.cn, cn_hash_function (ce->rule.cn, 0));
-		if (e)
-		  {
-		    msg (lev, "   %s %s",
-			 e->cn,
-			 drop_accept (!e->exclude));
-		  }
-		else
-		  {
-		    msg (lev, "   %s LOOKUP FAILED", ce->rule.cn);
-		  }
-	      }
-	  }
-	}
-    }
-}
-
-static void
-pf_set_print (const struct pf_set *pfs, const int lev)
-{
-  if (pfs)
-    {
-      msg (lev, " ----- struct pf_set -----");
-      msg (lev, " kill=%d", pfs->kill);
-      pf_subnet_set_print (&pfs->sns, lev);
-      pf_cn_set_print (&pfs->cns, lev);
-    }
-}
-
-void
-pf_context_print (const struct pf_context *pfc, const char *prefix, const int lev)
-{
-  msg (lev, "----- %s : struct pf_context -----", prefix);
-  if (pfc)
-    {
-      msg (lev, "enabled=%d", pfc->enabled);
-#ifdef PLUGIN_PF
-      msg (lev, "filename='%s'", np(pfc->filename));
-      msg (lev, "file_last_mod=%u", (unsigned int)pfc->file_last_mod);
-      msg (lev, "n_check_reload=%u", pfc->n_check_reload);
-      msg (lev, "reload=[%d,%u,%u]", pfc->reload.defined, pfc->reload.n, (unsigned int)pfc->reload.last);
-#endif
-      pf_set_print (pfc->pfs, lev);
-    }
-  msg (lev, "--------------------");
-}
-
-#endif
-
-#endif