summaryrefslogtreecommitdiffstats
path: root/lib/librte_gso/gso_tcp4.c
diff options
context:
space:
mode:
authorLuca Boccassi <luca.boccassi@gmail.com>2017-11-08 14:15:11 +0000
committerLuca Boccassi <luca.boccassi@gmail.com>2017-11-08 14:45:54 +0000
commit055c52583a2794da8ba1e85a48cce3832372b12f (patch)
tree8ceb1cb78fbb46a0f341f8ee24feb3c6b5540013 /lib/librte_gso/gso_tcp4.c
parentf239aed5e674965691846e8ce3f187dd47523689 (diff)
New upstream version 17.11-rc3
Change-Id: I6a5baa40612fe0c20f30b5fa773a6cbbac63a685 Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'lib/librte_gso/gso_tcp4.c')
-rw-r--r--lib/librte_gso/gso_tcp4.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/lib/librte_gso/gso_tcp4.c b/lib/librte_gso/gso_tcp4.c
new file mode 100644
index 00000000..0c628cb1
--- /dev/null
+++ b/lib/librte_gso/gso_tcp4.c
@@ -0,0 +1,102 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2017 Intel Corporation. All rights reserved.
+ * 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 Intel Corporation nor the names of its
+ * 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 "gso_common.h"
+#include "gso_tcp4.h"
+
+static void
+update_ipv4_tcp_headers(struct rte_mbuf *pkt, uint8_t ipid_delta,
+ struct rte_mbuf **segs, uint16_t nb_segs)
+{
+ struct ipv4_hdr *ipv4_hdr;
+ struct tcp_hdr *tcp_hdr;
+ uint32_t sent_seq;
+ uint16_t id, tail_idx, i;
+ uint16_t l3_offset = pkt->l2_len;
+ uint16_t l4_offset = l3_offset + pkt->l3_len;
+
+ ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char*) +
+ l3_offset);
+ tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
+ id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
+ sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
+ tail_idx = nb_segs - 1;
+
+ for (i = 0; i < nb_segs; i++) {
+ update_ipv4_header(segs[i], l3_offset, id);
+ update_tcp_header(segs[i], l4_offset, sent_seq, i < tail_idx);
+ id += ipid_delta;
+ sent_seq += (segs[i]->pkt_len - segs[i]->data_len);
+ }
+}
+
+int
+gso_tcp4_segment(struct rte_mbuf *pkt,
+ uint16_t gso_size,
+ uint8_t ipid_delta,
+ struct rte_mempool *direct_pool,
+ struct rte_mempool *indirect_pool,
+ struct rte_mbuf **pkts_out,
+ uint16_t nb_pkts_out)
+{
+ struct ipv4_hdr *ipv4_hdr;
+ uint16_t pyld_unit_size, hdr_offset;
+ uint16_t frag_off;
+ int ret;
+
+ /* Don't process the fragmented packet */
+ ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
+ pkt->l2_len);
+ frag_off = rte_be_to_cpu_16(ipv4_hdr->fragment_offset);
+ if (unlikely(IS_FRAGMENTED(frag_off))) {
+ pkts_out[0] = pkt;
+ return 1;
+ }
+
+ /* Don't process the packet without data */
+ hdr_offset = pkt->l2_len + pkt->l3_len + pkt->l4_len;
+ if (unlikely(hdr_offset >= pkt->pkt_len)) {
+ pkts_out[0] = pkt;
+ return 1;
+ }
+
+ pyld_unit_size = gso_size - hdr_offset;
+
+ /* Segment the payload */
+ ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool,
+ indirect_pool, pkts_out, nb_pkts_out);
+ if (ret > 1)
+ update_ipv4_tcp_headers(pkt, ipid_delta, pkts_out, ret);
+
+ return ret;
+}