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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | // SPDX-License-Identifier: GPL-2.0-only /* * KUnit tests for element fragmentation * * Copyright (C) 2023-2024 Intel Corporation */ #include <linux/ieee80211.h> #include <net/cfg80211.h> #include <kunit/test.h> static void defragment_0(struct kunit *test) { ssize_t ret; static const u8 input[] = { [0] = WLAN_EID_EXTENSION, [1] = 254, [2] = WLAN_EID_EXT_EHT_MULTI_LINK, [27] = 27, [123] = 123, [254 + 2] = WLAN_EID_FRAGMENT, [254 + 3] = 7, [254 + 3 + 7] = 0, /* for size */ }; u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL); KUNIT_ASSERT_NOT_NULL(test, data); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), NULL, 0, WLAN_EID_FRAGMENT); KUNIT_EXPECT_EQ(test, ret, 253); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), data, ret, WLAN_EID_FRAGMENT); KUNIT_EXPECT_EQ(test, ret, 253); KUNIT_EXPECT_MEMEQ(test, data, input + 3, 253); } static void defragment_1(struct kunit *test) { ssize_t ret; static const u8 input[] = { [0] = WLAN_EID_EXTENSION, [1] = 255, [2] = WLAN_EID_EXT_EHT_MULTI_LINK, [27] = 27, [123] = 123, [255 + 2] = WLAN_EID_FRAGMENT, [255 + 3] = 7, [255 + 3 + 1] = 0xaa, [255 + 3 + 8] = WLAN_EID_FRAGMENT, /* not used */ [255 + 3 + 9] = 1, [255 + 3 + 10] = 0, /* for size */ }; u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL); const struct element *elem; int count = 0; KUNIT_ASSERT_NOT_NULL(test, data); for_each_element(elem, input, sizeof(input)) count++; /* check the elements are right */ KUNIT_ASSERT_EQ(test, count, 3); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), NULL, 0, WLAN_EID_FRAGMENT); KUNIT_EXPECT_EQ(test, ret, 254 + 7); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), data, ret, WLAN_EID_FRAGMENT); /* this means the last fragment was not used */ KUNIT_EXPECT_EQ(test, ret, 254 + 7); KUNIT_EXPECT_MEMEQ(test, data, input + 3, 254); KUNIT_EXPECT_MEMEQ(test, data + 254, input + 255 + 4, 7); } static void defragment_2(struct kunit *test) { ssize_t ret; static const u8 input[] = { [0] = WLAN_EID_EXTENSION, [1] = 255, [2] = WLAN_EID_EXT_EHT_MULTI_LINK, [27] = 27, [123] = 123, [257 + 0] = WLAN_EID_FRAGMENT, [257 + 1] = 255, [257 + 20] = 0xaa, [2 * 257 + 0] = WLAN_EID_FRAGMENT, [2 * 257 + 1] = 1, [2 * 257 + 2] = 0xcc, [2 * 257 + 3] = WLAN_EID_FRAGMENT, /* not used */ [2 * 257 + 4] = 1, [2 * 257 + 5] = 0, /* for size */ }; u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL); const struct element *elem; int count = 0; KUNIT_ASSERT_NOT_NULL(test, data); for_each_element(elem, input, sizeof(input)) count++; /* check the elements are right */ KUNIT_ASSERT_EQ(test, count, 4); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), NULL, 0, WLAN_EID_FRAGMENT); /* this means the last fragment was not used */ KUNIT_EXPECT_EQ(test, ret, 254 + 255 + 1); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), data, ret, WLAN_EID_FRAGMENT); KUNIT_EXPECT_EQ(test, ret, 254 + 255 + 1); KUNIT_EXPECT_MEMEQ(test, data, input + 3, 254); KUNIT_EXPECT_MEMEQ(test, data + 254, input + 257 + 2, 255); KUNIT_EXPECT_MEMEQ(test, data + 254 + 255, input + 2 * 257 + 2, 1); } static void defragment_at_end(struct kunit *test) { ssize_t ret; static const u8 input[] = { [0] = WLAN_EID_EXTENSION, [1] = 255, [2] = WLAN_EID_EXT_EHT_MULTI_LINK, [27] = 27, [123] = 123, [255 + 2] = WLAN_EID_FRAGMENT, [255 + 3] = 7, [255 + 3 + 7] = 0, /* for size */ }; u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL); KUNIT_ASSERT_NOT_NULL(test, data); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), NULL, 0, WLAN_EID_FRAGMENT); KUNIT_EXPECT_EQ(test, ret, 254 + 7); ret = cfg80211_defragment_element((void *)input, input, sizeof(input), data, ret, WLAN_EID_FRAGMENT); KUNIT_EXPECT_EQ(test, ret, 254 + 7); KUNIT_EXPECT_MEMEQ(test, data, input + 3, 254); KUNIT_EXPECT_MEMEQ(test, data + 254, input + 255 + 4, 7); } static struct kunit_case element_fragmentation_test_cases[] = { KUNIT_CASE(defragment_0), KUNIT_CASE(defragment_1), KUNIT_CASE(defragment_2), KUNIT_CASE(defragment_at_end), {} }; static struct kunit_suite element_fragmentation = { .name = "cfg80211-element-defragmentation", .test_cases = element_fragmentation_test_cases, }; kunit_test_suite(element_fragmentation); |