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325 lines
11 KiB
C
325 lines
11 KiB
C
/*
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* Copyright (C) 2019 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief Tests 6LoWPAN fragmentation handling of gnrc stack.
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*
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* @author Martine S. Lenders <m.lenders@fu-berlin.de>
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*
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* @}
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*/
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#include "embUnit.h"
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#include "net/gnrc.h"
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#include "net/gnrc/netif/ieee802154.h"
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#include "net/gnrc/sixlowpan.h"
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#include "net/gnrc/sixlowpan/frag/rb.h"
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#include "net/gnrc/sixlowpan/frag/vrb.h"
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#include "net/gnrc/ipv6/nib.h"
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#include "net/netdev_test.h"
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#include "test_utils/expect.h"
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#include "thread.h"
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#include "xtimer.h"
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#define TEST_DST { 0x5a, 0x9d, 0x93, 0x86, 0x22, 0x08, 0x65, 0x79 }
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#define TEST_SRC { 0x2a, 0xab, 0xdc, 0x15, 0x54, 0x01, 0x64, 0x79 }
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#define TEST_6LO_PAYLOAD { \
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/* 6LoWPAN, Src: 2001:db8::1, Dest: 2001:db8::2
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* Fragmentation Header
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* 1100 0... = Pattern: First fragment (0x18)
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* Datagram size: 188
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* Datagram tag: 0x000f
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* IPHC Header
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* 011. .... = Pattern: IP header compression (0x03)
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* ...1 1... .... .... = Version, traffic class, and flow label compressed (0x3)
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* .... .0.. .... .... = Next header: Inline
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* .... ..10 .... .... = Hop limit: 64 (0x2)
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* .... .... 0... .... = Context identifier extension: False
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* .... .... .0.. .... = Source address compression: Stateless
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* .... .... ..00 .... = Source address mode: Inline (0x0000)
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* .... .... .... 0... = Multicast address compression: False
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* .... .... .... .0.. = Destination address compression: Stateless
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* .... .... .... ..00 = Destination address mode: Inline (0x0000)
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* Next header: ICMPv6 (0x3a)
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* Source: 2001:db8::1
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* Destination: 2001:db8::2 */ \
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0xc0, 0xbc, 0x00, 0x0f, \
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/* IPHC Header
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* 011. .... = Pattern: IP header compression (0x03)
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* ...1 1... .... .... = Version, traffic class, and flow label compressed (0x3)
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* .... .0.. .... .... = Next header: Inline
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* .... ..10 .... .... = Hop limit: 64 (0x2)
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* .... .... 0... .... = Context identifier extension: False
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* .... .... .0.. .... = Source address compression: Stateless
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* .... .... ..00 .... = Source address mode: Inline (0x0000)
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* .... .... .... 0... = Multicast address compression: False
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* .... .... .... .0.. = Destination address compression: Stateless
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* .... .... .... ..00 = Destination address mode: Inline (0x0000)
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* Next header: ICMPv6 (0x3a) */ \
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0x7a, 0x00, 0x3a, \
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/* Source: 2001:db8::1 */ \
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0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, \
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/* Destination: 2001:db8::2 */ \
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0x20, 0x01, 0x0d, 0xb8, 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, \
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/* Internet Control Message Protocol v6
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* Type: Echo (ping) request (128)
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* Code: 0
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* Checksum: 0x8ea0
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* Identifier: 0x238f
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* Sequence: 2
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* [No response seen]
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* Data (140 bytes)
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* Data: 9d4bb21c5353535353535353535353535353535353535353…
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*/ \
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0x80, 0x00, 0x8e, 0xa0, 0x23, 0x8f, 0x00, 0x02, \
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0x9d, 0x4b, 0xb2, 0x1c, 0x53, 0x53, 0x53, 0x53, \
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0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, \
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0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, \
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0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, \
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0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, \
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0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, 0x53, \
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}
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#define TEST_TAG (0x000f)
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#define TEST_TGT_IPV6 { 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
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0x48, 0x3d, 0x1d, 0x0c, 0x98, 0x31, 0x58, 0xae }
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const uint8_t _test_src[] = TEST_SRC;
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const uint8_t _test_dst[] = TEST_DST;
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const uint8_t _test_6lo_payload[] = TEST_6LO_PAYLOAD;
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const ipv6_addr_t _test_tgt_ipv6 = { .u8 = TEST_TGT_IPV6 };
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static char _mock_netif_stack[THREAD_STACKSIZE_DEFAULT];
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static netdev_test_t _mock_dev;
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static gnrc_netif_t _netif;
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static gnrc_netif_t *_mock_netif;
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void _set_up(void)
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{
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/* Add default route for the VRB entry created from */
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gnrc_ipv6_nib_ft_add(NULL, 0, &_test_tgt_ipv6, _mock_netif->pid, 0);
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}
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void _tear_down(void)
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{
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gnrc_ipv6_nib_ft_del(NULL, 0);
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gnrc_sixlowpan_frag_rb_reset();
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gnrc_sixlowpan_frag_vrb_reset();
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}
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gnrc_pktsnip_t *_create_fragment(void)
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{
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gnrc_pktsnip_t *res = gnrc_netif_hdr_build(_test_src, sizeof(_test_src),
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_test_dst, sizeof(_test_dst));
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if (res == NULL) {
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return NULL;
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}
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gnrc_netif_hdr_set_netif(res->data, _mock_netif);
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res = gnrc_pktbuf_add(res, _test_6lo_payload, sizeof(_test_6lo_payload),
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GNRC_NETTYPE_SIXLOWPAN);
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return res;
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}
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static unsigned _dispatch_to_6lowpan(gnrc_pktsnip_t *pkt)
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{
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unsigned res = gnrc_netapi_dispatch_receive(GNRC_NETTYPE_SIXLOWPAN,
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GNRC_NETREG_DEMUX_CTX_ALL,
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pkt);
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thread_yield_higher();
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return res;
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}
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static bool _rb_is_empty(void)
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{
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const gnrc_sixlowpan_frag_rb_t *rb = gnrc_sixlowpan_frag_rb_array();
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unsigned res = 0;
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for (unsigned i = 0; i < CONFIG_GNRC_SIXLOWPAN_FRAG_RBUF_SIZE; i++) {
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res += gnrc_sixlowpan_frag_rb_entry_empty(&rb[i]);
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}
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return res;
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}
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static void _test_no_vrbe_but_rbe_exists(void)
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{
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const gnrc_sixlowpan_frag_rb_t *rb = gnrc_sixlowpan_frag_rb_array();
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unsigned rbs = 0;
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/* VRB entry does not exist */
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TEST_ASSERT_NULL(gnrc_sixlowpan_frag_vrb_get(_test_src,
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sizeof(_test_src),
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TEST_TAG));
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/* and one reassembly buffer entry exists with the source and tag exists */
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for (unsigned i = 0; i < CONFIG_GNRC_SIXLOWPAN_FRAG_RBUF_SIZE; i++) {
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if (!gnrc_sixlowpan_frag_rb_entry_empty(&rb[i])) {
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rbs++;
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TEST_ASSERT_EQUAL_INT(sizeof(_test_src), rb[i].super.src_len);
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TEST_ASSERT_EQUAL_INT(0, memcmp(rb[i].super.src, _test_src,
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rb[i].super.src_len));
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TEST_ASSERT_EQUAL_INT(TEST_TAG, rb[i].super.tag);
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/* release packet for packet buffer check */
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gnrc_pktbuf_release(rb[i].pkt);
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}
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}
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TEST_ASSERT_EQUAL_INT(1, rbs);
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}
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static void test_recv__success(void)
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{
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gnrc_pktsnip_t *pkt = _create_fragment();
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TEST_ASSERT_NOT_NULL(pkt);
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TEST_ASSERT_EQUAL_INT(1, _dispatch_to_6lowpan(pkt));
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/* A VRB entry exists was created but deleted due to -ENOTSUP being
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* returned by gnrc_sixlowpan_iphc.c:_forward_frag()
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* but the reassembly buffer is empty */
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TEST_ASSERT(_rb_is_empty());
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TEST_ASSERT(gnrc_pktbuf_is_empty());
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}
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static void test_recv__no_route(void)
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{
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gnrc_pktsnip_t *pkt = _create_fragment();
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gnrc_ipv6_nib_ft_del(NULL, 0);
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TEST_ASSERT_NOT_NULL(pkt);
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TEST_ASSERT_EQUAL_INT(1, _dispatch_to_6lowpan(pkt));
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_test_no_vrbe_but_rbe_exists();
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TEST_ASSERT(gnrc_pktbuf_is_empty());
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}
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static void test_recv__vrb_full(void)
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{
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gnrc_pktsnip_t *pkt = _create_fragment();
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gnrc_sixlowpan_frag_rb_base_t base = {
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.src = TEST_SRC,
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.src_len = sizeof(_test_src),
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.tag = TEST_TAG,
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};
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TEST_ASSERT_NOT_NULL(pkt);
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/* Fill up VRB */
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for (unsigned i = 0; i < CONFIG_GNRC_SIXLOWPAN_FRAG_VRB_SIZE; i++) {
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base.tag++;
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base.arrival = xtimer_now_usec();
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TEST_ASSERT_NOT_NULL(gnrc_sixlowpan_frag_vrb_add(&base, _mock_netif,
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_test_dst,
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sizeof(_test_dst)));
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}
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TEST_ASSERT_EQUAL_INT(1, _dispatch_to_6lowpan(pkt));
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_test_no_vrbe_but_rbe_exists();
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TEST_ASSERT(gnrc_pktbuf_is_empty());
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}
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static void test_recv__pkt_held(void)
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{
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gnrc_pktsnip_t *pkt = _create_fragment();
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TEST_ASSERT_NOT_NULL(pkt);
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gnrc_pktbuf_hold(pkt, 1);
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TEST_ASSERT_EQUAL_INT(1, _dispatch_to_6lowpan(pkt));
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/* A VRB entry exists was created but deleted due to -ENOTSUP being
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* returned by gnrc_sixlowpan_iphc.c:_forward_frag()
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* but the reassembly buffer is empty */
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TEST_ASSERT(_rb_is_empty());
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gnrc_pktbuf_release(pkt);
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TEST_ASSERT(gnrc_pktbuf_is_empty());
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}
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static void run_unittests(void)
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{
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EMB_UNIT_TESTFIXTURES(fixtures) {
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new_TestFixture(test_recv__success),
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new_TestFixture(test_recv__no_route),
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new_TestFixture(test_recv__vrb_full),
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new_TestFixture(test_recv__pkt_held),
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};
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EMB_UNIT_TESTCALLER(sixlo_iphc_vrb_tests, _set_up, _tear_down, fixtures);
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TESTS_START();
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TESTS_RUN((Test *)&sixlo_iphc_vrb_tests);
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TESTS_END();
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}
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static int _get_netdev_device_type(netdev_t *netdev, void *value, size_t max_len)
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{
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expect(max_len == sizeof(uint16_t));
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(void)netdev;
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*((uint16_t *)value) = NETDEV_TYPE_IEEE802154;
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return sizeof(uint16_t);
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}
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static int _get_netdev_proto(netdev_t *netdev, void *value, size_t max_len)
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{
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expect(max_len == sizeof(gnrc_nettype_t));
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(void)netdev;
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*((gnrc_nettype_t *)value) = GNRC_NETTYPE_SIXLOWPAN;
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return sizeof(gnrc_nettype_t);
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}
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static int _get_netdev_max_pdu_size(netdev_t *netdev, void *value,
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size_t max_len)
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{
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expect(max_len == sizeof(uint16_t));
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(void)netdev;
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*((uint16_t *)value) = sizeof(_test_6lo_payload);
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return sizeof(uint16_t);
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}
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static int _get_netdev_src_len(netdev_t *netdev, void *value, size_t max_len)
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{
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(void)netdev;
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expect(max_len == sizeof(uint16_t));
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*((uint16_t *)value) = sizeof(_test_dst);
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return sizeof(uint16_t);
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}
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static int _get_netdev_addr_long(netdev_t *netdev, void *value, size_t max_len)
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{
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(void)netdev;
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expect(max_len >= sizeof(_test_dst));
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memcpy(value, _test_dst, sizeof(_test_dst));
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return sizeof(_test_dst);
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}
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static void _init_mock_netif(void)
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{
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netdev_test_setup(&_mock_dev, NULL);
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netdev_test_set_get_cb(&_mock_dev, NETOPT_DEVICE_TYPE,
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_get_netdev_device_type);
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netdev_test_set_get_cb(&_mock_dev, NETOPT_PROTO,
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_get_netdev_proto);
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netdev_test_set_get_cb(&_mock_dev, NETOPT_MAX_PDU_SIZE,
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_get_netdev_max_pdu_size);
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netdev_test_set_get_cb(&_mock_dev, NETOPT_SRC_LEN,
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_get_netdev_src_len);
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netdev_test_set_get_cb(&_mock_dev, NETOPT_ADDRESS_LONG,
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_get_netdev_addr_long);
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gnrc_netif_ieee802154_create(&_netif, _mock_netif_stack,
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THREAD_STACKSIZE_DEFAULT, GNRC_NETIF_PRIO,
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"mock_netif", &_mock_dev.netdev.netdev);
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_mock_netif = &_netif;
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thread_yield_higher();
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}
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int main(void)
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{
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_init_mock_netif();
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run_unittests();
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return 0;
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}
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