diff --git a/libs/freetdm/Makefile b/libs/freetdm/Makefile
new file mode 100644
index 0000000000..a9a87dbd6d
--- /dev/null
+++ b/libs/freetdm/Makefile
@@ -0,0 +1,54 @@
+# Copyright (c) 2007, Anthony Minessale II
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# 
+# * Neither the name of the original author; nor the names of any contributors
+# may be used to endorse or promote products derived from this software
+# without specific prior written permission.
+# 
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+CC=gcc
+OBJS=hashtable.o hashtable_itr.o openzap.o zap_config.o
+CFLAGS=$(USER_CFLAGS) -Wall -Werror -Wextra -std=c99 -pedantic -ansi
+MYLIB=libopenzap.a
+
+CFLAGS +=-DZAP_WANPIPE_SUPPORT
+OBJS += zap_wanpipe.o
+
+#CFLAGS +=-DZAP_ZT_SUPPORT
+#OBJS += zap_zt.o
+
+
+$(MYLIB): $(OBJS)
+	ar rcs $(MYLIB) $(OBJS)
+	ranlib $(MYLIB)
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+all: $(MYLIB)
+
+clean:
+	rm -f *.o $(MYLIB) *~ \#*
+
diff --git a/libs/freetdm/hashtable.c b/libs/freetdm/hashtable.c
new file mode 100644
index 0000000000..763357edce
--- /dev/null
+++ b/libs/freetdm/hashtable.c
@@ -0,0 +1,274 @@
+/* Copyright (C) 2004 Christopher Clark <firstname.lastname@cl.cam.ac.uk> */
+
+#include "hashtable.h"
+#include "hashtable_private.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+
+/*
+Credit for primes table: Aaron Krowne
+ http://br.endernet.org/~akrowne/
+ http://planetmath.org/encyclopedia/GoodHashTablePrimes.html
+*/
+static const unsigned int primes[] = {
+53, 97, 193, 389,
+769, 1543, 3079, 6151,
+12289, 24593, 49157, 98317,
+196613, 393241, 786433, 1572869,
+3145739, 6291469, 12582917, 25165843,
+50331653, 100663319, 201326611, 402653189,
+805306457, 1610612741
+};
+const unsigned int prime_table_length = sizeof(primes)/sizeof(primes[0]);
+const float max_load_factor = 0.65;
+
+/*****************************************************************************/
+struct hashtable *
+create_hashtable(unsigned int minsize,
+                 unsigned int (*hashf) (void*),
+                 int (*eqf) (void*,void*))
+{
+    struct hashtable *h;
+    unsigned int pindex, size = primes[0];
+    /* Check requested hashtable isn't too large */
+    if (minsize > (1u << 30)) return NULL;
+    /* Enforce size as prime */
+    for (pindex=0; pindex < prime_table_length; pindex++) {
+        if (primes[pindex] > minsize) { size = primes[pindex]; break; }
+    }
+    h = (struct hashtable *)malloc(sizeof(struct hashtable));
+    if (NULL == h) return NULL; /*oom*/
+    h->table = (struct entry **)malloc(sizeof(struct entry*) * size);
+    if (NULL == h->table) { free(h); return NULL; } /*oom*/
+    memset(h->table, 0, size * sizeof(struct entry *));
+    h->tablelength  = size;
+    h->primeindex   = pindex;
+    h->entrycount   = 0;
+    h->hashfn       = hashf;
+    h->eqfn         = eqf;
+    h->loadlimit    = (unsigned int) ceil(size * max_load_factor);
+    return h;
+}
+
+/*****************************************************************************/
+unsigned int
+hash(struct hashtable *h, void *k)
+{
+    /* Aim to protect against poor hash functions by adding logic here
+     * - logic taken from java 1.4 hashtable source */
+    unsigned int i = h->hashfn(k);
+    i += ~(i << 9);
+    i ^=  ((i >> 14) | (i << 18)); /* >>> */
+    i +=  (i << 4);
+    i ^=  ((i >> 10) | (i << 22)); /* >>> */
+    return i;
+}
+
+/*****************************************************************************/
+static int
+hashtable_expand(struct hashtable *h)
+{
+    /* Double the size of the table to accomodate more entries */
+    struct entry **newtable;
+    struct entry *e;
+    struct entry **pE;
+    unsigned int newsize, i, index;
+    /* Check we're not hitting max capacity */
+    if (h->primeindex == (prime_table_length - 1)) return 0;
+    newsize = primes[++(h->primeindex)];
+
+    newtable = (struct entry **)malloc(sizeof(struct entry*) * newsize);
+    if (NULL != newtable)
+    {
+        memset(newtable, 0, newsize * sizeof(struct entry *));
+        /* This algorithm is not 'stable'. ie. it reverses the list
+         * when it transfers entries between the tables */
+        for (i = 0; i < h->tablelength; i++) {
+            while (NULL != (e = h->table[i])) {
+                h->table[i] = e->next;
+                index = indexFor(newsize,e->h);
+                e->next = newtable[index];
+                newtable[index] = e;
+            }
+        }
+        free(h->table);
+        h->table = newtable;
+    }
+    /* Plan B: realloc instead */
+    else 
+    {
+        newtable = (struct entry **)
+                   realloc(h->table, newsize * sizeof(struct entry *));
+        if (NULL == newtable) { (h->primeindex)--; return 0; }
+        h->table = newtable;
+        memset(newtable[h->tablelength], 0, newsize - h->tablelength);
+        for (i = 0; i < h->tablelength; i++) {
+            for (pE = &(newtable[i]), e = *pE; e != NULL; e = *pE) {
+                index = indexFor(newsize,e->h);
+                if (index == i)
+                {
+                    pE = &(e->next);
+                }
+                else
+                {
+                    *pE = e->next;
+                    e->next = newtable[index];
+                    newtable[index] = e;
+                }
+            }
+        }
+    }
+    h->tablelength = newsize;
+    h->loadlimit   = (unsigned int) ceil(newsize * max_load_factor);
+    return -1;
+}
+
+/*****************************************************************************/
+unsigned int
+hashtable_count(struct hashtable *h)
+{
+    return h->entrycount;
+}
+
+/*****************************************************************************/
+int
+hashtable_insert(struct hashtable *h, void *k, void *v)
+{
+    /* This method allows duplicate keys - but they shouldn't be used */
+    unsigned int index;
+    struct entry *e;
+    if (++(h->entrycount) > h->loadlimit)
+    {
+        /* Ignore the return value. If expand fails, we should
+         * still try cramming just this value into the existing table
+         * -- we may not have memory for a larger table, but one more
+         * element may be ok. Next time we insert, we'll try expanding again.*/
+        hashtable_expand(h);
+    }
+    e = (struct entry *)malloc(sizeof(struct entry));
+    if (NULL == e) { --(h->entrycount); return 0; } /*oom*/
+    e->h = hash(h,k);
+    index = indexFor(h->tablelength,e->h);
+    e->k = k;
+    e->v = v;
+    e->next = h->table[index];
+    h->table[index] = e;
+    return -1;
+}
+
+/*****************************************************************************/
+void * /* returns value associated with key */
+hashtable_search(struct hashtable *h, void *k)
+{
+    struct entry *e;
+    unsigned int hashvalue, index;
+    hashvalue = hash(h,k);
+    index = indexFor(h->tablelength,hashvalue);
+    e = h->table[index];
+    while (NULL != e)
+    {
+        /* Check hash value to short circuit heavier comparison */
+        if ((hashvalue == e->h) && (h->eqfn(k, e->k))) return e->v;
+        e = e->next;
+    }
+    return NULL;
+}
+
+/*****************************************************************************/
+void * /* returns value associated with key */
+hashtable_remove(struct hashtable *h, void *k)
+{
+    /* TODO: consider compacting the table when the load factor drops enough,
+     *       or provide a 'compact' method. */
+
+    struct entry *e;
+    struct entry **pE;
+    void *v;
+    unsigned int hashvalue, index;
+
+    hashvalue = hash(h,k);
+    index = indexFor(h->tablelength,hash(h,k));
+    pE = &(h->table[index]);
+    e = *pE;
+    while (NULL != e)
+    {
+        /* Check hash value to short circuit heavier comparison */
+        if ((hashvalue == e->h) && (h->eqfn(k, e->k)))
+        {
+            *pE = e->next;
+            h->entrycount--;
+            v = e->v;
+            freekey(e->k);
+            free(e);
+            return v;
+        }
+        pE = &(e->next);
+        e = e->next;
+    }
+    return NULL;
+}
+
+/*****************************************************************************/
+/* destroy */
+void
+hashtable_destroy(struct hashtable *h, int free_values)
+{
+    unsigned int i;
+    struct entry *e, *f;
+    struct entry **table = h->table;
+    if (free_values)
+    {
+        for (i = 0; i < h->tablelength; i++)
+        {
+            e = table[i];
+            while (NULL != e)
+            { f = e; e = e->next; freekey(f->k); free(f->v); free(f); }
+        }
+    }
+    else
+    {
+        for (i = 0; i < h->tablelength; i++)
+        {
+            e = table[i];
+            while (NULL != e)
+            { f = e; e = e->next; freekey(f->k); free(f); }
+        }
+    }
+    free(h->table);
+    free(h);
+}
+
+/*
+ * Copyright (c) 2002, Christopher Clark
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
diff --git a/libs/freetdm/hashtable.h b/libs/freetdm/hashtable.h
new file mode 100644
index 0000000000..b90781abd4
--- /dev/null
+++ b/libs/freetdm/hashtable.h
@@ -0,0 +1,199 @@
+/* Copyright (C) 2002 Christopher Clark <firstname.lastname@cl.cam.ac.uk> */
+
+#ifndef __HASHTABLE_CWC22_H__
+#define __HASHTABLE_CWC22_H__
+
+struct hashtable;
+
+/* Example of use:
+ *
+ *      struct hashtable  *h;
+ *      struct some_key   *k;
+ *      struct some_value *v;
+ *
+ *      static unsigned int         hash_from_key_fn( void *k );
+ *      static int                  keys_equal_fn ( void *key1, void *key2 );
+ *
+ *      h = create_hashtable(16, hash_from_key_fn, keys_equal_fn);
+ *      k = (struct some_key *)     malloc(sizeof(struct some_key));
+ *      v = (struct some_value *)   malloc(sizeof(struct some_value));
+ *
+ *      (initialise k and v to suitable values)
+ * 
+ *      if (! hashtable_insert(h,k,v) )
+ *      {     exit(-1);               }
+ *
+ *      if (NULL == (found = hashtable_search(h,k) ))
+ *      {    printf("not found!");                  }
+ *
+ *      if (NULL == (found = hashtable_remove(h,k) ))
+ *      {    printf("Not found\n");                 }
+ *
+ */
+
+/* Macros may be used to define type-safe(r) hashtable access functions, with
+ * methods specialized to take known key and value types as parameters.
+ * 
+ * Example:
+ *
+ * Insert this at the start of your file:
+ *
+ * DEFINE_HASHTABLE_INSERT(insert_some, struct some_key, struct some_value);
+ * DEFINE_HASHTABLE_SEARCH(search_some, struct some_key, struct some_value);
+ * DEFINE_HASHTABLE_REMOVE(remove_some, struct some_key, struct some_value);
+ *
+ * This defines the functions 'insert_some', 'search_some' and 'remove_some'.
+ * These operate just like hashtable_insert etc., with the same parameters,
+ * but their function signatures have 'struct some_key *' rather than
+ * 'void *', and hence can generate compile time errors if your program is
+ * supplying incorrect data as a key (and similarly for value).
+ *
+ * Note that the hash and key equality functions passed to create_hashtable
+ * still take 'void *' parameters instead of 'some key *'. This shouldn't be
+ * a difficult issue as they're only defined and passed once, and the other
+ * functions will ensure that only valid keys are supplied to them.
+ *
+ * The cost for this checking is increased code size and runtime overhead
+ * - if performance is important, it may be worth switching back to the
+ * unsafe methods once your program has been debugged with the safe methods.
+ * This just requires switching to some simple alternative defines - eg:
+ * #define insert_some hashtable_insert
+ *
+ */
+
+/*****************************************************************************
+ * create_hashtable
+   
+ * @name                    create_hashtable
+ * @param   minsize         minimum initial size of hashtable
+ * @param   hashfunction    function for hashing keys
+ * @param   key_eq_fn       function for determining key equality
+ * @return                  newly created hashtable or NULL on failure
+ */
+
+struct hashtable *
+create_hashtable(unsigned int minsize,
+                 unsigned int (*hashfunction) (void*),
+                 int (*key_eq_fn) (void*,void*));
+
+/*****************************************************************************
+ * hashtable_insert
+   
+ * @name        hashtable_insert
+ * @param   h   the hashtable to insert into
+ * @param   k   the key - hashtable claims ownership and will free on removal
+ * @param   v   the value - does not claim ownership
+ * @return      non-zero for successful insertion
+ *
+ * This function will cause the table to expand if the insertion would take
+ * the ratio of entries to table size over the maximum load factor.
+ *
+ * This function does not check for repeated insertions with a duplicate key.
+ * The value returned when using a duplicate key is undefined -- when
+ * the hashtable changes size, the order of retrieval of duplicate key
+ * entries is reversed.
+ * If in doubt, remove before insert.
+ */
+
+int 
+hashtable_insert(struct hashtable *h, void *k, void *v);
+
+#define DEFINE_HASHTABLE_INSERT(fnname, keytype, valuetype) \
+int fnname (struct hashtable *h, keytype *k, valuetype *v) \
+{ \
+    return hashtable_insert(h,k,v); \
+}
+
+/*****************************************************************************
+ * hashtable_search
+   
+ * @name        hashtable_search
+ * @param   h   the hashtable to search
+ * @param   k   the key to search for  - does not claim ownership
+ * @return      the value associated with the key, or NULL if none found
+ */
+
+void *
+hashtable_search(struct hashtable *h, void *k);
+
+#define DEFINE_HASHTABLE_SEARCH(fnname, keytype, valuetype) \
+valuetype * fnname (struct hashtable *h, keytype *k) \
+{ \
+    return (valuetype *) (hashtable_search(h,k)); \
+}
+
+/*****************************************************************************
+ * hashtable_remove
+   
+ * @name        hashtable_remove
+ * @param   h   the hashtable to remove the item from
+ * @param   k   the key to search for  - does not claim ownership
+ * @return      the value associated with the key, or NULL if none found
+ */
+
+void * /* returns value */
+hashtable_remove(struct hashtable *h, void *k);
+
+#define DEFINE_HASHTABLE_REMOVE(fnname, keytype, valuetype) \
+valuetype * fnname (struct hashtable *h, keytype *k) \
+{ \
+    return (valuetype *) (hashtable_remove(h,k)); \
+}
+
+
+/*****************************************************************************
+ * hashtable_count
+   
+ * @name        hashtable_count
+ * @param   h   the hashtable
+ * @return      the number of items stored in the hashtable
+ */
+unsigned int
+hashtable_count(struct hashtable *h);
+
+
+/*****************************************************************************
+ * hashtable_destroy
+   
+ * @name        hashtable_destroy
+ * @param   h   the hashtable
+ * @param       free_values     whether to call 'free' on the remaining values
+ */
+
+void
+hashtable_destroy(struct hashtable *h, int free_values);
+
+#endif /* __HASHTABLE_CWC22_H__ */
+
+/*
+ * Copyright (c) 2002, Christopher Clark
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
diff --git a/libs/freetdm/hashtable_itr.c b/libs/freetdm/hashtable_itr.c
new file mode 100644
index 0000000000..defac691f0
--- /dev/null
+++ b/libs/freetdm/hashtable_itr.c
@@ -0,0 +1,176 @@
+/* Copyright (C) 2002, 2004 Christopher Clark  <firstname.lastname@cl.cam.ac.uk> */
+
+#include "hashtable.h"
+#include "hashtable_private.h"
+#include "hashtable_itr.h"
+#include <stdlib.h> /* defines NULL */
+
+/*****************************************************************************/
+/* hashtable_iterator    - iterator constructor */
+
+struct hashtable_itr *
+hashtable_iterator(struct hashtable *h)
+{
+    unsigned int i, tablelength;
+    struct hashtable_itr *itr = (struct hashtable_itr *)
+        malloc(sizeof(struct hashtable_itr));
+    if (NULL == itr) return NULL;
+    itr->h = h;
+    itr->e = NULL;
+    itr->parent = NULL;
+    tablelength = h->tablelength;
+    itr->index = tablelength;
+    if (0 == h->entrycount) return itr;
+
+    for (i = 0; i < tablelength; i++)
+    {
+        if (NULL != h->table[i])
+        {
+            itr->e = h->table[i];
+            itr->index = i;
+            break;
+        }
+    }
+    return itr;
+}
+
+/*****************************************************************************/
+/* advance - advance the iterator to the next element
+ *           returns zero if advanced to end of table */
+
+int
+hashtable_iterator_advance(struct hashtable_itr *itr)
+{
+    unsigned int j,tablelength;
+    struct entry **table;
+    struct entry *next;
+    if (NULL == itr->e) return 0; /* stupidity check */
+
+    next = itr->e->next;
+    if (NULL != next)
+    {
+        itr->parent = itr->e;
+        itr->e = next;
+        return -1;
+    }
+    tablelength = itr->h->tablelength;
+    itr->parent = NULL;
+    if (tablelength <= (j = ++(itr->index)))
+    {
+        itr->e = NULL;
+        return 0;
+    }
+    table = itr->h->table;
+    while (NULL == (next = table[j]))
+    {
+        if (++j >= tablelength)
+        {
+            itr->index = tablelength;
+            itr->e = NULL;
+            return 0;
+        }
+    }
+    itr->index = j;
+    itr->e = next;
+    return -1;
+}
+
+/*****************************************************************************/
+/* remove - remove the entry at the current iterator position
+ *          and advance the iterator, if there is a successive
+ *          element.
+ *          If you want the value, read it before you remove:
+ *          beware memory leaks if you don't.
+ *          Returns zero if end of iteration. */
+
+int
+hashtable_iterator_remove(struct hashtable_itr *itr)
+{
+    struct entry *remember_e, *remember_parent;
+    int ret;
+
+    /* Do the removal */
+    if (NULL == (itr->parent))
+    {
+        /* element is head of a chain */
+        itr->h->table[itr->index] = itr->e->next;
+    } else {
+        /* element is mid-chain */
+        itr->parent->next = itr->e->next;
+    }
+    /* itr->e is now outside the hashtable */
+    remember_e = itr->e;
+    itr->h->entrycount--;
+    freekey(remember_e->k);
+
+    /* Advance the iterator, correcting the parent */
+    remember_parent = itr->parent;
+    ret = hashtable_iterator_advance(itr);
+    if (itr->parent == remember_e) { itr->parent = remember_parent; }
+    free(remember_e);
+    return ret;
+}
+
+/*****************************************************************************/
+int /* returns zero if not found */
+hashtable_iterator_search(struct hashtable_itr *itr,
+                          struct hashtable *h, void *k)
+{
+    struct entry *e, *parent;
+    unsigned int hashvalue, index;
+
+    hashvalue = hash(h,k);
+    index = indexFor(h->tablelength,hashvalue);
+
+    e = h->table[index];
+    parent = NULL;
+    while (NULL != e)
+    {
+        /* Check hash value to short circuit heavier comparison */
+        if ((hashvalue == e->h) && (h->eqfn(k, e->k)))
+        {
+            itr->index = index;
+            itr->e = e;
+            itr->parent = parent;
+            itr->h = h;
+            return -1;
+        }
+        parent = e;
+        e = e->next;
+    }
+    return 0;
+}
+
+
+/*
+ * Copyright (c) 2002, 2004, Christopher Clark
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
diff --git a/libs/freetdm/hashtable_itr.h b/libs/freetdm/hashtable_itr.h
new file mode 100644
index 0000000000..50ea10420a
--- /dev/null
+++ b/libs/freetdm/hashtable_itr.h
@@ -0,0 +1,104 @@
+/* Copyright (C) 2002, 2004 Christopher Clark <firstname.lastname@cl.cam.ac.uk> */
+
+#ifndef __HASHTABLE_ITR_CWC22__
+#define __HASHTABLE_ITR_CWC22__
+#include "hashtable.h"
+#include "hashtable_private.h" /* needed to enable inlining */
+
+/*****************************************************************************/
+/* This struct is only concrete here to allow the inlining of two of the
+ * accessor functions. */
+struct hashtable_itr
+{
+    struct hashtable *h;
+    struct entry *e;
+    struct entry *parent;
+    unsigned int index;
+};
+
+
+/*****************************************************************************/
+/* hashtable_iterator
+ */
+
+struct hashtable_itr *
+hashtable_iterator(struct hashtable *h);
+
+/*****************************************************************************/
+/* hashtable_iterator_key
+ * - return the value of the (key,value) pair at the current position */
+
+#define hashtable_iterator_key(i) (void *)i->e->k
+
+/*****************************************************************************/
+/* value - return the value of the (key,value) pair at the current position */
+
+#define hashtable_iterator_value (void *)i->e->v
+
+/*****************************************************************************/
+/* advance - advance the iterator to the next element
+ *           returns zero if advanced to end of table */
+
+int
+hashtable_iterator_advance(struct hashtable_itr *itr);
+
+/*****************************************************************************/
+/* remove - remove current element and advance the iterator to the next element
+ *          NB: if you need the value to free it, read it before
+ *          removing. ie: beware memory leaks!
+ *          returns zero if advanced to end of table */
+
+int
+hashtable_iterator_remove(struct hashtable_itr *itr);
+
+/*****************************************************************************/
+/* search - overwrite the supplied iterator, to point to the entry
+ *          matching the supplied key.
+            h points to the hashtable to be searched.
+ *          returns zero if not found. */
+int
+hashtable_iterator_search(struct hashtable_itr *itr,
+                          struct hashtable *h, void *k);
+
+#define DEFINE_HASHTABLE_ITERATOR_SEARCH(fnname, keytype) \
+int fnname (struct hashtable_itr *i, struct hashtable *h, keytype *k) \
+{ \
+    return (hashtable_iterator_search(i,h,k)); \
+}
+
+
+
+#endif /* __HASHTABLE_ITR_CWC22__*/
+
+/*
+ * Copyright (c) 2002, 2004, Christopher Clark
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
diff --git a/libs/freetdm/hashtable_private.h b/libs/freetdm/hashtable_private.h
new file mode 100644
index 0000000000..cb261e9af2
--- /dev/null
+++ b/libs/freetdm/hashtable_private.h
@@ -0,0 +1,82 @@
+/* Copyright (C) 2002, 2004 Christopher Clark <firstname.lastname@cl.cam.ac.uk> */
+
+#ifndef __HASHTABLE_PRIVATE_CWC22_H__
+#define __HASHTABLE_PRIVATE_CWC22_H__
+
+#include "hashtable.h"
+
+/*****************************************************************************/
+struct entry
+{
+    void *k, *v;
+    unsigned int h;
+    struct entry *next;
+};
+
+struct hashtable {
+    unsigned int tablelength;
+    struct entry **table;
+    unsigned int entrycount;
+    unsigned int loadlimit;
+    unsigned int primeindex;
+    unsigned int (*hashfn) (void *k);
+    int (*eqfn) (void *k1, void *k2);
+};
+
+/*****************************************************************************/
+unsigned int
+hash(struct hashtable *h, void *k);
+
+/*****************************************************************************/
+/* indexFor */
+#define indexFor(hashvalue, tablelength) (unsigned int)(hashvalue % tablelength)
+
+/* Only works if tablelength == 2^N */
+/*static inline unsigned int
+indexFor(unsigned int tablelength, unsigned int hashvalue)
+{
+    return (hashvalue & (tablelength - 1u));
+}
+*/
+
+/*****************************************************************************/
+#define freekey(X) free(X)
+/*define freekey(X) ; */
+
+
+/*****************************************************************************/
+
+#endif /* __HASHTABLE_PRIVATE_CWC22_H__*/
+
+/*
+ * Copyright (c) 2002, Christopher Clark
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
diff --git a/libs/freetdm/openzap.c b/libs/freetdm/openzap.c
new file mode 100644
index 0000000000..0ac20f533a
--- /dev/null
+++ b/libs/freetdm/openzap.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include "openzap.h"
+#ifdef ZAP_WANPIPE_SUPPORT
+#include "zap_wanpipe.h"
+#endif
+#ifdef ZAP_ZT_SUPPORT
+#include "zap_zt.h"
+#endif
+
+static struct {
+	zap_hash_t *interface_hash;
+} globals;
+
+
+static int equalkeys(void *k1, void *k2)
+{
+    return strcmp((char *) k1, (char *) k2) ? 0 : 1;
+}
+
+static unsigned hashfromstring(void *ky)
+{
+	unsigned char *str = (unsigned char *) ky;
+	unsigned hash = 0;
+    int c;
+
+	while ((c = *str++)) {
+        hash = c + (hash << 6) + (hash << 16) - hash;
+	}
+	
+    return hash;
+}
+
+zap_status_t zap_span_create(zap_software_interface_t *zint, zap_span_t **span)
+{
+	zap_span_t *new_span = NULL;
+
+	assert(zint != NULL);
+
+	if (zint->span_index < ZAP_MAX_SPANS_INTERFACE) {
+		new_span = &zint->spans[++zint->span_index];
+		memset(new_span, 0, sizeof(*new_span));
+		zap_set_flag(new_span, ZAP_SPAN_CONFIGURED);
+		new_span->span_id = zint->span_index;
+		new_span->zint = zint;
+		*span = new_span;
+		return ZAP_SUCCESS;
+	}
+	
+	return ZAP_FAIL;
+}
+
+zap_status_t zap_span_add_channel(zap_span_t *span, zap_socket_t sockfd, zap_chan_type_t type, zap_channel_t **chan)
+{
+	if (span->chan_count < ZAP_MAX_CHANNELS_SPAN) {
+		zap_channel_t *new_chan;
+		new_chan = &span->channels[++span->chan_count];
+		new_chan->type = type;
+		new_chan->sockfd = sockfd;
+		new_chan->zint = span->zint;
+		zap_set_flag(new_chan, ZAP_CHANNEL_CONFIGURED | ZAP_CHANNEL_READY);
+		*chan = new_chan;
+		return ZAP_SUCCESS;
+	}
+
+	return ZAP_FAIL;
+}
+
+zap_status_t zap_span_destroy(zap_span_t **span);
+
+zap_status_t zap_channel_open(const char *name, unsigned span_id, unsigned chan_id, zap_channel_t **zchan)
+{
+	zap_software_interface_t *zint;
+
+	if (span_id < ZAP_MAX_SPANS_INTERFACE && chan_id < ZAP_MAX_CHANNELS_SPAN && 
+		(zint = (zap_software_interface_t *) hashtable_search(globals.interface_hash, (void *)name))) {
+		zap_channel_t *check;
+		check = &zint->spans[span_id].channels[chan_id];
+		if (zap_test_flag(check, ZAP_CHANNEL_READY) && ! zap_test_flag(check, ZAP_CHANNEL_OPEN)) {
+			zap_set_flag(check, ZAP_CHANNEL_OPEN);
+			*zchan = check;
+			return ZAP_SUCCESS;
+		}
+	}
+
+	return ZAP_FAIL;
+}
+
+zap_status_t zap_channel_close(zap_channel_t **zchan)
+{
+	zap_channel_t *check;
+	*zchan = NULL;
+	
+	assert(zchan != NULL);
+	check = *zchan;
+	assert(check != NULL);
+	
+	if (zap_test_flag(check, ZAP_CHANNEL_OPEN)) {
+		zap_clear_flag(check, ZAP_CHANNEL_OPEN);
+		return ZAP_SUCCESS;
+	}
+	
+	return ZAP_FAIL;
+}
+
+
+zap_status_t zap_channel_set_codec(zap_channel_t *zchan, zap_codec_t codec)
+{
+	assert(zchan != NULL);
+
+	if (!zap_test_flag(zchan, ZAP_CHANNEL_OPEN)) {
+		return ZAP_FAIL;
+	}
+
+	return zchan->zint->set_codec(zchan, codec);
+	
+}
+
+zap_status_t zap_channel_set_interval(zap_channel_t *zchan, unsigned ms)
+{
+	assert(zchan != NULL);
+
+    if (!zap_test_flag(zchan, ZAP_CHANNEL_OPEN)) {
+        return ZAP_FAIL;
+    }
+
+    return zchan->zint->set_interval(zchan, ms);
+
+}
+
+zap_status_t zap_channel_wait(zap_channel_t *zchan, zap_wait_flag_t flags)
+{
+	assert(zchan != NULL);
+
+    if (!zap_test_flag(zchan, ZAP_CHANNEL_OPEN)) {
+        return ZAP_FAIL;
+    }
+
+    return zchan->zint->wait(zchan, flags);
+
+}
+
+
+zap_status_t zap_channel_read(zap_channel_t *zchan, void *data, zap_size_t *datalen)
+{
+	assert(zchan != NULL);
+
+    if (!zap_test_flag(zchan, ZAP_CHANNEL_OPEN)) {
+        return ZAP_FAIL;
+    }
+
+    return zchan->zint->read(zchan, data, datalen);
+	
+}
+
+
+zap_status_t zap_channel_write(zap_channel_t *zchan, void *data, zap_size_t *datalen)
+{
+	assert(zchan != NULL);
+
+    if (!zap_test_flag(zchan, ZAP_CHANNEL_OPEN)) {
+        return ZAP_FAIL;
+    }
+
+    return zchan->zint->write(zchan, data, datalen);
+	
+}
+
+zap_status_t zap_global_init(void)
+{
+	zap_config_t cfg;
+	char *var, *val;
+	unsigned configured = 0;
+	zap_software_interface_t *zint;
+	
+	assert(zint = NULL);
+	
+	globals.interface_hash = create_hashtable(16, hashfromstring, equalkeys);
+
+#ifdef ZAP_WANPIPE_SUPPORT
+	if (wanpipe_init(&zint) == ZAP_SUCCESS) {
+		hashtable_insert(globals.interface_hash, (void *)zint->name, zint);
+	}
+#endif
+#ifdef ZAP_ZT_SUPPORT
+	if (zt_init(&zint) == ZAP_SUCCESS) {
+		hashtable_insert(globals.interface_hash, (void *)zint->name, zint);
+	}
+#endif
+
+	
+	if (!zap_config_open_file(&cfg, "openzap.conf")) {
+		return ZAP_FAIL;
+	}
+
+	while (zap_config_next_pair(&cfg, &var, &val)) {
+		if (!strcasecmp(cfg.category, "openzap")) {
+			if (!strcmp(var, "load")) {
+				zap_software_interface_t *zint;
+				
+				if ((zint = (zap_software_interface_t *) hashtable_search(globals.interface_hash, val))) {
+					if (zint->configure(zint) == ZAP_SUCCESS) {
+						configured++;
+					}
+				}
+			}
+		}
+	}
+
+	return configured ? ZAP_SUCCESS : ZAP_FAIL;
+}
+
+zap_status_t zap_global_destroy(void)
+{
+	hashtable_destroy(globals.interface_hash, 1);
+
+#ifdef ZAP_ZT_SUPPORT
+	zt_destroy();
+#endif
+#ifdef ZAP_WANPIPE_SUPPORT
+	wanpipe_destroy();
+#endif
+	return ZAP_SUCCESS;
+}
diff --git a/libs/freetdm/openzap.h b/libs/freetdm/openzap.h
new file mode 100644
index 0000000000..dcb43ef14f
--- /dev/null
+++ b/libs/freetdm/openzap.h
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef OPENZAP_H
+#define OPENZAP_H
+
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifndef _MSC_VER
+#include <strings.h>
+#endif
+#include <assert.h>
+#include "hashtable.h"
+#include "zap_config.h"
+
+#define ZAP_MAX_CHANNELS_SPAN 513
+#define ZAP_MAX_SPANS_INTERFACE 33
+
+typedef int zap_socket_t;
+typedef size_t zap_size_t;
+struct zap_software_interface;
+
+#define zap_copy_string(x,y,z) strncpy(x, y, z - 1) 
+
+/*!
+  \brief Test for the existance of a flag on an arbitary object
+  \param obj the object to test
+  \param flag the or'd list of flags to test
+  \return true value if the object has the flags defined
+*/
+#define zap_test_flag(obj, flag) ((obj)->flags & flag)
+
+/*!
+  \brief Set a flag on an arbitrary object
+  \param obj the object to set the flags on
+  \param flag the or'd list of flags to set
+*/
+#define zap_set_flag(obj, flag) (obj)->flags |= (flag)
+
+/*!
+  \brief Clear a flag on an arbitrary object while locked
+  \param obj the object to test
+  \param flag the or'd list of flags to clear
+*/
+#define zap_clear_flag(obj, flag) (obj)->flags &= ~(flag)
+
+/*!
+  \brief Copy flags from one arbitrary object to another
+  \param dest the object to copy the flags to
+  \param src the object to copy the flags from
+  \param flags the flags to copy
+*/
+#define zap_copy_flags(dest, src, flags) (dest)->flags &= ~(flags);	(dest)->flags |= ((src)->flags & (flags))
+
+
+/*!
+  \brief Free a pointer and set it to NULL unless it already is NULL
+  \param it the pointer
+*/
+#define zap_safe_free(it) if (it) {free(it);it=NULL;}
+
+typedef enum {
+	ZAP_SUCCESS,
+	ZAP_FAIL
+} zap_status_t;
+
+typedef enum {
+	ZAP_READ =  (1 <<  0),
+	ZAP_WRITE = (1 <<  1),
+	ZAP_ERROR = (1 <<  2),
+	ZAP_EVENT = (1 <<  3)
+} zap_wait_flag_t;
+
+typedef enum {
+	ZAP_CODEC_ULAW = 0,
+	ZAP_CODEC_ALAW = 8,
+	ZAP_CODEC_SLIN = 10
+} zap_codec_t;
+
+typedef enum {
+	ZAP_SPAN_CONFIGURED = (1 << 0),
+	ZAP_SPAN_READY = (1 << 1)
+} zap_span_flag_t;
+
+typedef enum {
+	ZAP_CHAN_TYPE_B,
+	ZAP_CHAN_TYPE_DQ921,
+	ZAP_CHAN_TYPE_DQ931,
+	ZAP_CHAN_TYPE_FXS,
+	ZAP_CHAN_TYPE_FXO
+} zap_chan_type_t;
+
+typedef enum {
+	ZAP_CHANNEL_CONFIGURED = (1 << 0),
+	ZAP_CHANNEL_READY = (1 << 1),
+	ZAP_CHANNEL_OPEN = (1 << 2)
+} zap_channel_flag_t;
+
+struct zap_channel {
+	unsigned span_id;
+	unsigned chan_id;
+	zap_chan_type_t type;
+	zap_socket_t sockfd;
+	zap_channel_flag_t flags;
+	struct zap_software_interface *zint;
+};
+typedef struct zap_channel zap_channel_t;
+
+struct zap_span {
+	unsigned span_id;
+	unsigned chan_count;
+	zap_span_flag_t flags;
+	struct zap_software_interface *zint;
+	zap_channel_t channels[ZAP_MAX_CHANNELS_SPAN];
+};
+typedef struct zap_span zap_span_t;
+
+typedef zap_status_t (*zint_configure_t)(struct zap_software_interface *zint);
+typedef zap_status_t (*zint_open_t)(unsigned span_id, unsigned chan_id, zap_channel_t **zchan);
+typedef zap_status_t (*zint_close_t)(zap_channel_t **zchan);
+typedef zap_status_t (*zint_set_codec_t)(zap_channel_t *zchan, zap_codec_t codec);
+typedef zap_status_t (*zint_set_interval_t)(zap_channel_t *zchan, unsigned ms);
+typedef zap_status_t (*zint_wait_t)(zap_channel_t *zchan, zap_wait_flag_t flags);
+typedef zap_status_t (*zint_read_t)(zap_channel_t *zchan, void *data, zap_size_t *datalen);
+typedef zap_status_t (*zint_write_t)(zap_channel_t *zchan, void *data, zap_size_t *datalen);
+
+struct zap_software_interface {
+	const char *name;
+	zint_configure_t configure;
+	zint_open_t open;
+	zint_close_t close;
+	zint_set_codec_t set_codec;
+	zint_set_interval_t set_interval;
+	zint_wait_t wait;
+	zint_read_t read;
+	zint_write_t write;
+	unsigned span_index;
+	struct zap_span spans[ZAP_MAX_SPANS_INTERFACE];
+};
+typedef struct zap_software_interface zap_software_interface_t;
+
+zap_status_t zap_span_create(zap_software_interface_t *zint, zap_span_t **span);
+zap_status_t zap_span_add_channel(zap_span_t *span, zap_socket_t sockfd, zap_chan_type_t type, zap_channel_t **chan);
+zap_status_t zap_span_destroy(zap_span_t **span);
+
+zap_status_t zap_channel_open(const char *name, unsigned span_id, unsigned chan_id, zap_channel_t **zchan);
+zap_status_t zap_channel_close(zap_channel_t **zchan);
+zap_status_t zap_channel_set_codec(zap_channel_t *zchan, zap_codec_t codec);
+zap_status_t zap_channel_set_interval(zap_channel_t *zchan, unsigned ms);
+zap_status_t zap_channel_wait(zap_channel_t *zchan, zap_wait_flag_t flags);
+zap_status_t zap_channel_read(zap_channel_t *zchan, void *data, zap_size_t *datalen);
+zap_status_t zap_channel_write(zap_channel_t *zchan, void *data, zap_size_t *datalen);
+zap_status_t zap_global_init(void);
+zap_status_t zap_global_destroy(void);
+
+typedef struct hashtable zap_hash_t;
+
+#endif
diff --git a/libs/freetdm/zap_config.c b/libs/freetdm/zap_config.c
new file mode 100644
index 0000000000..17fa4d0596
--- /dev/null
+++ b/libs/freetdm/zap_config.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "openzap.h"
+#include "zap_config.h"
+
+int zap_config_open_file(zap_config_t *cfg, char *file_path)
+{
+	FILE *f;
+	char *path = NULL;
+	char path_buf[1024];
+
+	if (file_path[0] == '/') {
+		path = file_path;
+	} else {
+		snprintf(path_buf, sizeof(path_buf), "%s%s%s", ZAP_CONFIG_DIR, ZAP_PATH_SEPARATOR, file_path);
+		path = path_buf;
+	}
+
+	if (!path) {
+		return 0;
+	}
+
+	memset(cfg, 0, sizeof(*cfg));
+	cfg->lockto = -1;
+
+	if (!(f = fopen(path, "r"))) {
+		if (file_path[0] != '/') {
+			int last = -1;
+			char *var, *val;
+
+			snprintf(path_buf, sizeof(path_buf), "%s%sopenzap.conf", ZAP_CONFIG_DIR, ZAP_PATH_SEPARATOR);
+			path = path_buf;
+
+			if ((f = fopen(path, "r")) == 0) {
+				return 0;
+			}
+
+			cfg->file = f;
+			cfg->path = path;
+
+			while (zap_config_next_pair(cfg, &var, &val)) {
+				if ((cfg->sectno != last) && !strcmp(cfg->section, file_path)) {
+					cfg->lockto = cfg->sectno;
+					return 1;
+				}
+			}
+
+			zap_config_close_file(cfg);
+			memset(cfg, 0, sizeof(*cfg));
+			return 0;
+		}
+
+		return 0;
+	} else {
+		cfg->file = f;
+		cfg->path = path;
+		return 1;
+	}
+}
+
+
+void zap_config_close_file(zap_config_t *cfg)
+{
+
+	if (cfg->file) {
+		fclose(cfg->file);
+	}
+
+	memset(cfg, 0, sizeof(*cfg));
+}
+
+
+
+int zap_config_next_pair(zap_config_t *cfg, char **var, char **val)
+{
+	int ret = 0;
+	char *p, *end;
+
+	*var = *val = NULL;
+
+	if (!cfg->path) {
+		return 0;
+	}
+
+	for (;;) {
+		cfg->lineno++;
+
+		if (!fgets(cfg->buf, sizeof(cfg->buf), cfg->file)) {
+			ret = 0;
+			break;
+		}
+		*var = cfg->buf;
+
+		if (**var == '[' && (end = strchr(*var, ']')) != 0) {
+			*end = '\0';
+			(*var)++;
+			if (**var == '+') {
+				(*var)++;
+				zap_copy_string(cfg->section, *var, sizeof(cfg->section));
+				cfg->sectno++;
+
+				if (cfg->lockto > -1 && cfg->sectno != cfg->lockto) {
+					break;
+				}
+				cfg->catno = 0;
+				cfg->lineno = 0;
+				*var = "";
+				*val = "";
+				return 1;
+			} else {
+				zap_copy_string(cfg->category, *var, sizeof(cfg->category));
+				cfg->catno++;
+			}
+			continue;
+		}
+
+
+
+		if (**var == '#' || **var == ';' || **var == '\n' || **var == '\r') {
+			continue;
+		}
+
+		if (!strncmp(*var, "__END__", 7)) {
+			break;
+		}
+
+
+		if ((end = strchr(*var, '#')) != 0 || (end = strchr(*var, ';')) != 0) {
+			*end = '\0';
+			end--;
+		} else if ((end = strchr(*var, '\n')) != 0) {
+			if (*(end - 1) == '\r') {
+				end--;
+			}
+			*end = '\0';
+		}
+
+		p = *var;
+		while ((*p == ' ' || *p == '\t') && p != end) {
+			*p = '\0';
+			p++;
+		}
+		*var = p;
+
+
+		if ((*val = strchr(*var, '=')) == 0) {
+			ret = -1;
+			/* log_printf(0, server.log, "Invalid syntax on %s: line %d\n", cfg->path, cfg->lineno); */
+			continue;
+		} else {
+			p = *val - 1;
+			*(*val) = '\0';
+			(*val)++;
+			if (*(*val) == '>') {
+				*(*val) = '\0';
+				(*val)++;
+			}
+
+			while ((*p == ' ' || *p == '\t') && p != *var) {
+				*p = '\0';
+				p--;
+			}
+
+			p = *val;
+			while ((*p == ' ' || *p == '\t') && p != end) {
+				*p = '\0';
+				p++;
+			}
+			*val = p;
+			ret = 1;
+			break;
+		}
+	}
+
+
+	return ret;
+
+}
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
+ */
diff --git a/libs/freetdm/zap_config.h b/libs/freetdm/zap_config.h
new file mode 100644
index 0000000000..61aa93c177
--- /dev/null
+++ b/libs/freetdm/zap_config.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @defgroup config Config File Parser
+ * @ingroup config
+ * This module implements a basic interface and file format parser
+ * 
+ * <pre>
+ *
+ * EXAMPLE 
+ * 
+ * [category1]
+ * var1 => val1
+ * var2 => val2
+ * \# lines that begin with \# are comments
+ * \#var3 => val3
+ * </pre>
+ * @{
+ */
+
+#ifndef ZAP_CONFIG_H
+#define ZAP_CONFIG_H
+
+#include "openzap.h"
+#define ZAP_URL_SEPARATOR "://"
+
+
+#ifdef WIN32
+#define ZAP_PATH_SEPARATOR "\\"
+#ifndef ZAP_CONFIG_DIR
+#define ZAP_CONFIG_DIR "c:\\openzap"
+#endif
+#define zap_is_file_path(file) (*(file +1) == ':' || *file == '/' || strstr(file, SWITCH_URL_SEPARATOR))
+#else
+#define ZAP_PATH_SEPARATOR "/"
+#ifndef ZAP_CONFIG_DIR
+#define ZAP_CONFIG_DIR "/etc/openzap"
+#endif
+#define zap_is_file_path(file) ((*file == '/') || strstr(file, SWITCH_URL_SEPARATOR))
+#endif
+
+typedef struct zap_config zap_config_t;
+
+/*! \brief A simple file handle representing an open configuration file **/
+struct zap_config {
+	/*! FILE stream buffer to the opened file */
+	FILE *file;
+	/*! path to the file */
+	char *path;
+	/*! current category */
+	char category[256];
+	/*! current section */
+	char section[256];
+	/*! buffer of current line being read */
+	char buf[1024];
+	/*! current line number in file */
+	int lineno;
+	/*! current category number in file */
+	int catno;
+	/*! current section number in file */
+	int sectno;
+
+	int lockto;
+};
+
+/*!
+  \brief Open a configuration file
+  \param cfg (zap_config_t *) config handle to use
+  \param file_path path to the file
+  \return 1 (true) on success 0 (false) on failure
+*/
+int zap_config_open_file(zap_config_t * cfg, char *file_path);
+
+/*!
+  \brief Close a previously opened configuration file
+  \param cfg (zap_config_t *) config handle to use
+*/
+void zap_config_close_file(zap_config_t * cfg);
+
+/*!
+  \brief Retrieve next name/value pair from configuration file
+  \param cfg (zap_config_t *) config handle to use
+  \param var pointer to aim at the new variable name
+  \param val pointer to aim at the new value
+*/
+int zap_config_next_pair(zap_config_t * cfg, char **var, char **val);
+
+
+/** @} */
+#endif
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
+ */
diff --git a/libs/freetdm/zap_skel.c b/libs/freetdm/zap_skel.c
new file mode 100644
index 0000000000..2cefd04603
--- /dev/null
+++ b/libs/freetdm/zap_skel.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include "openzap.h"
+#include "zap_skel.h"
+
+zap_status_t skel_init(zap_software_interface_t **zint)
+{
+	assert(zint != NULL);
+
+	return ZAP_FAIL;
+}
+
+zap_status_t skel_destroy(void)
+{
+	return ZAP_FAIL;
+}
diff --git a/libs/freetdm/zap_skel.h b/libs/freetdm/zap_skel.h
new file mode 100644
index 0000000000..9fdaadf7b5
--- /dev/null
+++ b/libs/freetdm/zap_skel.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ZAP_SKEL_H
+#define ZAP_SKEL_H
+#include "openzap.h"
+
+zap_status_t skel_init(zap_software_interface_t **zint);
+zap_status_t skel_destroy(void);
+
+#endif
diff --git a/libs/freetdm/zap_wanpipe.c b/libs/freetdm/zap_wanpipe.c
new file mode 100644
index 0000000000..7cce6d6783
--- /dev/null
+++ b/libs/freetdm/zap_wanpipe.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include "openzap.h"
+#include "zap_wanpipe.h"
+
+zap_status_t wanpipe_init(zap_software_interface_t **zint)
+{
+	assert(zint != NULL);
+
+	return ZAP_FAIL;
+}
+
+zap_status_t wanpipe_destroy(void)
+{
+	return ZAP_FAIL;
+}
diff --git a/libs/freetdm/zap_wanpipe.h b/libs/freetdm/zap_wanpipe.h
new file mode 100644
index 0000000000..90cd9a0997
--- /dev/null
+++ b/libs/freetdm/zap_wanpipe.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ZAP_WANPIPE_H
+#define ZAP_WANPIPE_H
+#include "openzap.h"
+
+zap_status_t wanpipe_init(zap_software_interface_t **zint);
+zap_status_t wanpipe_destroy(void);
+
+#endif
diff --git a/libs/freetdm/zap_zt.c b/libs/freetdm/zap_zt.c
new file mode 100644
index 0000000000..012abc76b7
--- /dev/null
+++ b/libs/freetdm/zap_zt.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include "openzap.h"
+#include "zap_zt.h"
+
+zap_status_t zt_init(zap_software_interface_t **zint)
+{
+	assert(zint != NULL);
+
+	return ZAP_FAIL;
+}
+
+zap_status_t zt_destroy(void)
+{
+	return ZAP_FAIL;
+}
diff --git a/libs/freetdm/zap_zt.h b/libs/freetdm/zap_zt.h
new file mode 100644
index 0000000000..f9c2f59e0a
--- /dev/null
+++ b/libs/freetdm/zap_zt.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2007, Anthony Minessale II
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * * Neither the name of the original author; nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ZAP_ZT_H
+#define ZAP_ZT_H
+#include "openzap.h"
+
+zap_status_t zt_init(zap_software_interface_t **zint);
+zap_status_t zt_destroy(void);
+
+#endif