diff --git a/src/sdp/session.c b/src/sdp/session.c
new file mode 100644
index 0000000..f74cfe0
--- /dev/null
+++ b/src/sdp/session.c
@@ -0,0 +1,301 @@
+/**
+ * @file sdp/session.c  SDP Session
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+#include <re_types.h>
+#include <re_fmt.h>
+#include <re_mem.h>
+#include <re_mbuf.h>
+#include <re_list.h>
+#include <re_tmr.h>
+#include <re_sa.h>
+#include <re_sdp.h>
+#include <re_sys.h>
+#include "sdp.h"
+
+
+static void destructor(void *arg)
+{
+	struct sdp_session *sess = arg;
+
+	list_flush(&sess->lmedial);
+	list_flush(&sess->medial);
+	list_flush(&sess->rattrl);
+	list_flush(&sess->lattrl);
+}
+
+
+/**
+ * Allocate a new SDP Session
+ *
+ * @param sessp Pointer to allocated SDP Session object
+ * @param laddr Local network address
+ *
+ * @return 0 if success, otherwise errorcode
+ */
+int sdp_session_alloc(struct sdp_session **sessp, const struct sa *laddr)
+{
+	struct sdp_session *sess;
+	int err = 0, i;
+
+	if (!sessp || !laddr)
+		return EINVAL;
+
+	sess = mem_zalloc(sizeof(*sess), destructor);
+	if (!sess)
+		return ENOMEM;
+
+	sess->laddr = *laddr;
+	sess->id    = rand_u32();
+	sess->ver   = rand_u32() & 0x7fffffff;
+	sess->rdir  = SDP_SENDRECV;
+
+	sa_init(&sess->raddr, AF_INET);
+
+	for (i=0; i<SDP_BANDWIDTH_MAX; i++) {
+		sess->lbwv[i] = -1;
+		sess->rbwv[i] = -1;
+	}
+
+	if (err)
+		mem_deref(sess);
+	else
+		*sessp = sess;
+
+	return err;
+}
+
+
+/**
+ * Reset the remote side of an SDP Session
+ *
+ * @param sess SDP Session
+ */
+void sdp_session_rreset(struct sdp_session *sess)
+{
+	int i;
+
+	if (!sess)
+		return;
+
+	sa_init(&sess->raddr, AF_INET);
+
+	list_flush(&sess->rattrl);
+
+	sess->rdir = SDP_SENDRECV;
+
+	for (i=0; i<SDP_BANDWIDTH_MAX; i++)
+		sess->rbwv[i] = -1;
+}
+
+
+/**
+ * Set the local network address of an SDP Session
+ *
+ * @param sess  SDP Session
+ * @param laddr Local network address
+ */
+void sdp_session_set_laddr(struct sdp_session *sess, const struct sa *laddr)
+{
+	if (!sess || !laddr)
+		return;
+
+	sess->laddr = *laddr;
+}
+
+
+/**
+ * Set the local bandwidth of an SDP Session
+ *
+ * @param sess SDP Session
+ * @param type Bandwidth type
+ * @param bw   Bandwidth value
+ */
+void sdp_session_set_lbandwidth(struct sdp_session *sess,
+				enum sdp_bandwidth type, int32_t bw)
+{
+	if (!sess || type >= SDP_BANDWIDTH_MAX)
+		return;
+
+	sess->lbwv[type] = bw;
+}
+
+
+/**
+ * Set a local attribute of an SDP Session
+ *
+ * @param sess    SDP Session
+ * @param replace True to replace any existing attributes, false to append
+ * @param name    Attribute name
+ * @param value   Formatted attribute value
+ *
+ * @return 0 if success, otherwise errorcode
+ */
+int sdp_session_set_lattr(struct sdp_session *sess, bool replace,
+			  const char *name, const char *value, ...)
+{
+	va_list ap;
+	int err;
+
+	if (!sess || !name)
+		return EINVAL;
+
+	if (replace)
+		sdp_attr_del(&sess->lattrl, name);
+
+	va_start(ap, value);
+	err = sdp_attr_addv(&sess->lattrl, name, value, ap);
+	va_end(ap);
+
+	return err;
+}
+
+
+/**
+ * Delete a local attribute of an SDP Session
+ *
+ * @param sess SDP Session
+ * @param name Attribute name
+ */
+void sdp_session_del_lattr(struct sdp_session *sess, const char *name)
+{
+	if (!sess || !name)
+		return;
+
+	sdp_attr_del(&sess->lattrl, name);
+}
+
+
+/**
+ * Get the local bandwidth of an SDP Session
+ *
+ * @param sess SDP Session
+ * @param type Bandwidth type
+ *
+ * @return Bandwidth value
+ */
+int32_t sdp_session_lbandwidth(const struct sdp_session *sess,
+			       enum sdp_bandwidth type)
+{
+	if (!sess || type >= SDP_BANDWIDTH_MAX)
+		return 0;
+
+	return sess->lbwv[type];
+}
+
+
+/**
+ * Get the remote bandwidth of an SDP Session
+ *
+ * @param sess SDP Session
+ * @param type Bandwidth type
+ *
+ * @return Bandwidth value
+ */
+int32_t sdp_session_rbandwidth(const struct sdp_session *sess,
+				enum sdp_bandwidth type)
+{
+	if (!sess || type >= SDP_BANDWIDTH_MAX)
+		return 0;
+
+	return sess->rbwv[type];
+}
+
+
+/**
+ * Get a remote attribute of an SDP Session
+ *
+ * @param sess SDP Session
+ * @param name Attribute name
+ *
+ * @return Attribute value if exist, NULL if not exist
+ */
+const char *sdp_session_rattr(const struct sdp_session *sess, const char *name)
+{
+	if (!sess || !name)
+		return NULL;
+
+	return sdp_attr_apply(&sess->rattrl, name, NULL, NULL);
+}
+
+
+/**
+ * Apply a function handler of all matching remote attributes
+ *
+ * @param sess  SDP Session
+ * @param name  Attribute name
+ * @param attrh Attribute handler
+ * @param arg   Handler argument
+ *
+ * @return Attribute value if match
+ */
+const char *sdp_session_rattr_apply(const struct sdp_session *sess,
+				    const char *name,
+				    sdp_attr_h *attrh, void *arg)
+{
+	if (!sess)
+		return NULL;
+
+	return sdp_attr_apply(&sess->rattrl, name, attrh, arg);
+}
+
+
+/**
+ * Get the list of media-lines from an SDP Session
+ *
+ * @param sess  SDP Session
+ * @param local True for local, False for remote
+ *
+ * @return List of media-lines
+ */
+const struct list *sdp_session_medial(const struct sdp_session *sess,
+				      bool local)
+{
+	if (!sess)
+		return NULL;
+
+	return local ? &sess->lmedial : &sess->medial;
+}
+
+
+/**
+ * Print SDP Session debug information
+ *
+ * @param pf   Print function for output
+ * @param sess SDP Session
+ *
+ * @return 0 if success, otherwise errorcode
+ */
+int sdp_session_debug(struct re_printf *pf, const struct sdp_session *sess)
+{
+	struct le *le;
+	int err;
+
+	if (!sess)
+		return 0;
+
+	err = re_hprintf(pf, "SDP session\n");
+
+	err |= re_hprintf(pf, "  local attributes:\n");
+
+	for (le=sess->lattrl.head; le; le=le->next)
+		err |= re_hprintf(pf, "    %H\n", sdp_attr_debug, le->data);
+
+	err |= re_hprintf(pf, "  remote attributes:\n");
+
+	for (le=sess->rattrl.head; le; le=le->next)
+		err |= re_hprintf(pf, "    %H\n", sdp_attr_debug, le->data);
+
+	err |= re_hprintf(pf, "session media:\n");
+
+	for (le=sess->medial.head; le; le=le->next)
+		err |= sdp_media_debug(pf, le->data);
+
+	err |= re_hprintf(pf, "local media:\n");
+
+	for (le=sess->lmedial.head; le; le=le->next)
+		err |= sdp_media_debug(pf, le->data);
+
+	return err;
+}