l4p: add ability to assign user-data to the stream

Add ability for the user to assign user provided data to the stream.
Right now this user provided 64-bit value is passed as a parameter
for lookup4/lookup6 callbacks.
Another change: change interpretation of lookup4()/lookup6() return value:
<  0: error code (existing behaviour).
== 0: success, TLDK will update L3 header src/dst addresses based on
      tldk dev values (existing behaviour).
>  0: success, TLDK will not update L3 header src/dst addresses, will
      rely on user provided values.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Change-Id: I32521422e0372d79c4b2781dd6fc9740e4ca93ab

4 files changed, 26 insertions, 17 deletions

diff --git a/lib/libtle_l4p/stream.h b/lib/libtle_l4p/stream.h
index ebefa6c..405f662 100644
--- a/lib/libtle_l4p/stream.h
+++ b/lib/libtle_l4p/stream.h
@@ -33,6 +33,8 @@ struct tle_stream {
 
 	uint8_t type;	       /* TLE_V4 or TLE_V6 */
 
+	uint64_t udata; /* user data associated wih the stream */
+
 	/* Stream address information. */
 	union l4_ports port;
 	union l4_ports pmsk;
@@ -137,10 +139,10 @@ stream_get_dest(struct tle_stream *s, const void *dst_addr,
 
 	if (s->type == TLE_V4) {
 		d4 = dst_addr;
-		rc = ctx->prm.lookup4(ctx->prm.lookup4_data, d4, dst);
+		rc = ctx->prm.lookup4(ctx->prm.lookup4_data, s->udata, d4, dst);
 	} else if (s->type == TLE_V6) {
 		d6 = dst_addr;
-		rc = ctx->prm.lookup6(ctx->prm.lookup6_data, d6, dst);
+		rc = ctx->prm.lookup6(ctx->prm.lookup6_data, s->udata, d6, dst);
 	} else
 		rc = -ENOENT;
 
@@ -150,17 +152,19 @@ stream_get_dest(struct tle_stream *s, const void *dst_addr,
 	dev = dst->dev;
 	dst->ol_flags = dev->tx.ol_flags[s->type];
 
-	if (s->type == TLE_V4) {
-		struct rte_ipv4_hdr *l3h;
-		l3h = (struct rte_ipv4_hdr *)(dst->hdr + dst->l2_len);
-		l3h->src_addr = dev->prm.local_addr4.s_addr;
-		l3h->dst_addr = d4->s_addr;
-	} else {
-		struct rte_ipv6_hdr *l3h;
-		l3h = (struct rte_ipv6_hdr *)(dst->hdr + dst->l2_len);
-		rte_memcpy(l3h->src_addr, &dev->prm.local_addr6,
-			sizeof(l3h->src_addr));
-		rte_memcpy(l3h->dst_addr, d6, sizeof(l3h->dst_addr));
+	if (rc == 0) {
+		if (s->type == TLE_V4) {
+			struct rte_ipv4_hdr *l3h;
+			l3h = (struct rte_ipv4_hdr *)(dst->hdr + dst->l2_len);
+			l3h->src_addr = dev->prm.local_addr4.s_addr;
+			l3h->dst_addr = d4->s_addr;
+		} else {
+			struct rte_ipv6_hdr *l3h;
+			l3h = (struct rte_ipv6_hdr *)(dst->hdr + dst->l2_len);
+			rte_memcpy(l3h->src_addr, &dev->prm.local_addr6,
+				sizeof(l3h->src_addr));
+			rte_memcpy(l3h->dst_addr, d6, sizeof(l3h->dst_addr));
+		}
 	}
 
 	return dev - ctx->dev;
diff --git a/lib/libtle_l4p/tcp_stream.c b/lib/libtle_l4p/tcp_stream.c
index c1a007a..dbed84e 100644
--- a/lib/libtle_l4p/tcp_stream.c
+++ b/lib/libtle_l4p/tcp_stream.c
@@ -381,6 +381,8 @@ tcp_stream_fill_cfg(struct tle_tcp_stream *s, const struct tle_ctx_param *cprm,
 				cprm->icw;
 	s->tcb.snd.rto_tw = (cprm->timewait == TLE_TCP_TIMEWAIT_DEFAULT) ?
 				TCP_RTO_2MSL : cprm->timewait;
+
+	s->s.udata = scfg->udata;
 }
 
 static int
@@ -717,6 +719,7 @@ stream_update_cfg(struct tle_stream *ts,struct tle_tcp_stream_cfg *prm)
 	/* store other params */
 	s->tcb.snd.nb_retm = (prm->nb_retries != 0) ? prm->nb_retries :
 		TLE_TCP_DEFAULT_RETRIES;
+	s->s.udata = prm->udata;
 
 	/* invoke async notifications, if any */
 	if (rte_ring_count(s->rx.q) != 0) {
diff --git a/lib/libtle_l4p/tle_ctx.h b/lib/libtle_l4p/tle_ctx.h
index 391cfe3..e730441 100644
--- a/lib/libtle_l4p/tle_ctx.h
+++ b/lib/libtle_l4p/tle_ctx.h
@@ -123,14 +123,14 @@ struct tle_ctx_param {
 	uint32_t send_bulk_size;   /**< expected # of packets per send call. */
 	uint32_t flags;            /**< specific flags */
 
-	int (*lookup4)(void *opaque, const struct in_addr *addr,
-		struct tle_dest *res);
+	int (*lookup4)(void *opaque, uint64_t stream_udata,
+		const struct in_addr *addr, struct tle_dest *res);
 	/**< will be called by send() to get IPv4 packet destination info. */
 	void *lookup4_data;
 	/**< opaque data pointer for lookup4() callback. */
 
-	int (*lookup6)(void *opaque, const struct in6_addr *addr,
-		struct tle_dest *res);
+	int (*lookup6)(void *opaque, uint64_t stream_udata,
+		const struct in6_addr *addr, struct tle_dest *res);
 	/**< will be called by send() to get IPv6 packet destination info. */
 	void *lookup6_data;
 	/**< opaque data pointer for lookup6() callback. */
diff --git a/lib/libtle_l4p/tle_tcp.h b/lib/libtle_l4p/tle_tcp.h
index 9947041..76f3476 100644
--- a/lib/libtle_l4p/tle_tcp.h
+++ b/lib/libtle_l4p/tle_tcp.h
@@ -35,6 +35,8 @@ struct tle_tcp_stream_addr {
 struct tle_tcp_stream_cfg {
 	uint8_t nb_retries;     /**< max number of retransmission attempts. */
 
+	uint64_t udata; /**< user data to be associated with the stream. */
+
 	/* _cb and _ev are mutually exclusive */
 	struct tle_event *err_ev;      /**< error event to use.  */
 	struct tle_stream_cb err_cb;   /**< error callback to use. */