#include <assert.h>
#include <stdlib.h>
#include <inttypes.h>
#include <darwintest.h>
T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true));
extern uint32_t os_cpu_in_cksum(const void *, uint32_t, uint32_t);
static void
log_hexdump(const void *inp, size_t len)
{
unsigned i, off = 0;
char buf[9 + 16 * 3 + 1];
for (i = 0; i < len; i++) {
if (i % 16 == 0) {
off = (unsigned)snprintf(buf, sizeof(buf), "%08x:", i);
}
off += (unsigned)snprintf(buf + off, sizeof(buf) - off, " %02x", (((const uint8_t *)inp)[i]) & 0xff);
if (i % 16 == 15) {
T_LOG("%s", buf);
}
}
if (len % 16) {
T_LOG("%s", buf);
}
}
static uint16_t
dumb_in_cksum(const uint8_t *buf, size_t len)
{
uint32_t partial = 0;
while (len > 1) {
uint16_t val = buf[1];
val <<= 8;
val |= buf[0];
len -= 2;
buf += 2;
partial += val;
while ((val = partial >> 16)) {
partial &= 0xffff;
partial += val;
}
}
if (len) {
uint16_t val = buf[0];
partial += val;
while ((val = partial >> 16)) {
partial &= 0xffff;
partial += val;
}
}
return ~partial & 0xffff;
}
static uint16_t
split_in_cksum(const uint8_t *buf, int nsegs, const uint32_t *seglens, const uint8_t *aligns, uint8_t *tmpbuf)
{
uint32_t partial = 0;
for (int i = 0; i < nsegs; i++) {
assert((i + 1 == nsegs) || seglens[i] % 2 == 0);
memcpy(tmpbuf + aligns[i], buf, seglens[i]);
partial = os_cpu_in_cksum(tmpbuf + aligns[i], seglens[i], partial);
buf += seglens[i];
}
return ~partial & 0xffff;
}
static void
test_checksum(const uint8_t *data, uint32_t len)
{
uint16_t dsum = dumb_in_cksum(data, len);
const uint8_t MAXALIGN = 8;
uint8_t tmpbuf[len + MAXALIGN];
uint32_t seglens[2];
uint8_t aligns[2];
for (uint16_t split = 0; split < len; split += 2) {
seglens[0] = split;
seglens[1] = len - split;
for (aligns[0] = 0; aligns[0] < MAXALIGN; aligns[0]++) {
for (aligns[1] = 0; aligns[1] < MAXALIGN; aligns[1]++) {
uint16_t osum = split_in_cksum(data, 2, seglens, aligns, tmpbuf);
if (osum != dsum) {
log_hexdump(data, len);
T_LOG("len %d seg[0] %d seg[1] %d align[0] %d align[1] %d\n", len, seglens[0], seglens[1], aligns[0], aligns[1]);
}
T_QUIET; T_ASSERT_EQ(osum, dsum, "checksum mismatch got 0x%04x expecting 0x%04x", htons(osum), htons(dsum));
}
}
}
T_PASS("OK len %d", len);
}
static void
test_one_random_packet(uint32_t maxlen)
{
uint32_t len = arc4random_uniform(maxlen);
uint8_t data[len];
arc4random_buf(data, len);
test_checksum(data, len);
}
static uint8_t pkt49479689[] = {
0xc0, 0xa8, 0x01, 0x06, 0xc0, 0xa8, 0x01, 0x07, 0x00, 0x06, 0x05, 0xc8, 0xcb, 0xf1, 0xc0, 0x24, 0x2d, 0x23, 0x48, 0xd6, 0x3b, 0x44, 0x96, 0x7f, 0x80, 0x10, 0x20, 0x86, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x0c, 0xc4, 0x69, 0x3a, 0x31, 0x63, 0xb3, 0x37, 0x55, 0xe1, 0x62, 0x48, 0xa4, 0xff, 0xff, 0xa0, 0xc5, 0xd9, 0x5d, 0xd2, 0x4d, 0xe4, 0xca, 0xd7, 0x83, 0x27, 0xcc, 0x90, 0x02, 0x26, 0x63, 0xd3, 0x02, 0x3c, 0xf1, 0x20, 0x15, 0xa6, 0x8b, 0xff, 0x98, 0x8d, 0x57, 0x2a, 0x06, 0x4b, 0x06, 0x49, 0x5d, 0x8a, 0x28, 0x66, 0xe6, 0x57, 0x71, 0xd9, 0x27, 0xd1, 0xb9, 0xd6, 0x20, 0x48, 0x13, 0x2e, 0xbf, 0x30, 0x8c, 0xce, 0x49, 0x99, 0x2a, 0xb7, 0x94, 0xa4, 0x3a, 0x8e, 0x35, 0xcc, 0x48, 0xb2, 0x7f, 0xe1, 0xca, 0x2f, 0x08, 0x49, 0x7f, 0x35, 0x61, 0xcf, 0x59, 0xa2, 0x3a, 0x5e, 0x10, 0x5a, 0x0a, 0xd7, 0xa2, 0x38, 0x64, 0xe1, 0x7c, 0x5d, 0xbd, 0x29, 0x65, 0x5a, 0xf2, 0x14, 0x30, 0x51, 0x9b, 0x56, 0xbb, 0xe2, 0x04, 0x48, 0x04, 0x23, 0x53, 0x30, 0x3a, 0x0a, 0x48, 0x5a, 0xdd, 0xe4, 0xd7, 0x5e, 0x5b, 0x5d, 0x90, 0x89, 0x7d, 0xf0, 0xad, 0x24, 0x1a, 0xa8, 0x81, 0xc1, 0x6b, 0x11, 0x97, 0x68, 0xc0, 0xbb, 0xe4, 0x5c, 0xba, 0x1a, 0xe8, 0x9c, 0xc9, 0x8b, 0xb8, 0x2b, 0x11, 0x85, 0x7f, 0xbf, 0x19, 0x81, 0xb0, 0xfc, 0xfd, 0x4a, 0xac, 0x7b, 0xd3, 0x60, 0x44, 0x1f, 0x5e, 0x8d, 0x05, 0x6e, 0xd7, 0xd1, 0xef, 0x11, 0x84, 0xd3, 0x0d, 0x63, 0xcf, 0x56, 0xf9, 0x27, 0xc4, 0xd0, 0x39, 0x0e, 0xac, 0x7e, 0xba, 0xb3, 0xb8, 0x9c, 0x21, 0x21, 0xc8, 0xa0, 0xbc, 0xd8, 0x82, 0x6f, 0x81, 0xa6, 0xc2, 0xf5, 0xe0, 0xdb, 0x41, 0xd0, 0xd4, 0x18, 0x2a, 0x5b, 0x93, 0x3d, 0x5a, 0x08, 0xe2, 0xac, 0x8d, 0xd3, 0x7d, 0xcc, 0x49, 0x33, 0xc9, 0xb8, 0x9e, 0x12, 0x86, 0x63, 0x38, 0x9c, 0xce, 0x4a, 0xb7, 0xcc, 0xe9, 0x4b, 0x5e, 0xb5, 0x24, 0x42, 0x47, 0x28, 0x1c, 0x09, 0xe8, 0x84, 0xa6, 0xf0, 0x5f, 0x03, 0x94, 0x6f, 0x6a, 0x18, 0x60, 0xc3, 0x12, 0x58, 0x6c, 0xbe, 0x13, 0x85, 0xa4, 0xdf, 0xe1, 0x8c, 0x3a, 0x04, 0xe9, 0x56, 0xa3, 0x09, 0x41, 0xf1, 0x70, 0xf5, 0xc4, 0x27, 0x8e, 0x18, 0x09, 0x56, 0x5f, 0x82, 0x08, 0xec, 0x84, 0x55, 0x3b, 0x58, 0x84, 0x7b, 0xc8, 0x63, 0x70, 0x6a, 0x83, 0x04, 0xc8, 0xff, 0xe7, 0x6a, 0xbc, 0xee, 0xc0, 0xfe, 0xef, 0x60, 0xb7, 0x04, 0xb5, 0x57, 0x53, 0x5b, 0xeb, 0x4d, 0xec, 0x22, 0xe8, 0x59, 0x22, 0x64, 0x20, 0x5a, 0x61, 0x7d, 0x92, 0x02, 0x80, 0xd0, 0x85, 0x56, 0x98, 0x75, 0xbe, 0x35, 0xaf, 0xe4, 0xc3, 0x06, 0xfa, 0xc2, 0x29, 0xce, 0x80, 0xe2, 0x68, 0xf3, 0xd8, 0x4b, 0x72, 0x46, 0x6e, 0xa3, 0x88, 0x57, 0xfb, 0x08, 0xec, 0x60, 0x2f, 0x3c, 0xa4, 0xaf, 0x08, 0x64, 0x45, 0x16, 0xba, 0x7b, 0xad, 0x24, 0x7a, 0x1f, 0x53, 0x46, 0x0c, 0xe6, 0xe9, 0x99, 0xd7, 0x2b, 0x9d, 0x62, 0xd9, 0x4a, 0x80, 0x2a, 0x43, 0xc2, 0x78, 0xa6, 0x6b, 0x38, 0x8e, 0xc8, 0x40, 0x6b, 0x03, 0xe2, 0x47, 0x04, 0xda, 0x08, 0x72, 0xf5, 0xbc, 0x66, 0x3f, 0x33, 0x4d, 0xb6, 0x26, 0xd0, 0x66, 0x8c, 0xa0, 0x70, 0x25, 0xbc, 0x68, 0xda, 0x02, 0x79, 0x89, 0xed, 0x0c, 0xfc, 0xe7, 0x3d, 0x15, 0xcf, 0x5e, 0xc9, 0x63, 0xe0, 0x64, 0xb1, 0xfb, 0x28, 0xf7, 0x29, 0x52, 0xcf, 0x7a, 0xe3, 0x6d, 0x46, 0xc5, 0x1a, 0x71, 0x24, 0x4e, 0x12, 0x56, 0x86, 0xc7, 0xf5, 0x98, 0x3e, 0xa9, 0xbc, 0x5d, 0xe9, 0x22, 0x88, 0x9b, 0x61, 0xc4, 0xa2, 0xcc, 0x27, 0x54, 0x07, 0x88, 0xeb, 0xe1, 0x4e, 0xaa, 0x0a, 0xd6, 0x94, 0x83, 0x32, 0xf8, 0x1d, 0xff, 0x67, 0xe5, 0x63, 0x78, 0x04, 0x11, 0x24, 0x25, 0xd7, 0x22, 0x54, 0x73, 0x87, 0xc9, 0x53, 0x72, 0x51, 0xda, 0x24, 0x33, 0xd7, 0x5c, 0x40, 0x86, 0x77, 0xf9, 0xc2, 0xeb, 0x7d, 0x4c, 0x72, 0xeb, 0xc9, 0x8b, 0xcc, 0x79, 0xcd, 0x4a, 0x5a, 0x9e, 0xe2, 0x83, 0x20, 0x19, 0x5b, 0x4b, 0xe6, 0x5c, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x7b, 0x80, 0x69, 0x29, 0x53, 0x97, 0xc2, 0xc9, 0x4c, 0x00, 0x00, 0x00, 0x00, 0x67, 0x75, 0x81, 0x80, 0x12, 0x6e, 0x50, 0x66, 0xe9, 0x0a, 0x28, 0x3b, 0x1a, 0xf1, 0xcb, 0x46, 0x72, 0xf7, 0xe9, 0x9f, 0x84, 0x29, 0xb9, 0x95, 0xf9, 0x6d, 0x5d, 0x04, 0x51, 0x7f, 0x0e, 0xf0, 0xe4, 0x3d, 0x4b, 0xd2, 0xb2, 0xb5, 0x51, 0xf0, 0x31, 0x8e, 0x55, 0x18, 0x54, 0xf7, 0xee, 0x03, 0x37, 0x07, 0x33, 0x43, 0x8b, 0x5a, 0x1d, 0x16, 0xe8, 0xc4, 0x8b, 0x2c, 0x8a, 0x01, 0x5c, 0x45, 0xc6, 0xd1, 0x9d, 0xa9, 0x0a, 0xe2, 0x15, 0x4b, 0x8b, 0x00, 0x84, 0xbf, 0x3d, 0xad, 0xed, 0x86, 0x8e, 0x5c, 0x76, 0xe9, 0xbe, 0x4b, 0xd5, 0xb5, 0xb0, 0x08, 0x7f, 0xd7, 0x71, 0x57, 0x44, 0x67, 0x31, 0x8b, 0x43, 0x7d, 0xf8, 0x5a, 0xcd, 0xe6, 0x4c, 0xec, 0x89, 0xa5, 0xd1, 0x03, 0x86, 0xfd, 0x01, 0x7d, 0x22, 0x32, 0xf0, 0xc3, 0x23, 0x99, 0x8e, 0x69, 0x14, 0x54, 0x54, 0x03, 0xec, 0x27, 0x6a, 0x7d, 0x13, 0xc7, 0xe2, 0x39, 0x2b, 0xc0, 0x1a, 0x70, 0x82, 0xe9, 0x80, 0x73, 0xf4, 0x27, 0x26, 0xca, 0x5c, 0xf6, 0x7f, 0x46, 0xf7, 0x00, 0x58, 0x3c, 0x3a, 0xcc, 0x1e, 0x9b, 0xd2, 0x22, 0x78, 0x04, 0x23, 0xc6, 0xfb, 0xdf, 0x8b, 0x36, 0xd6, 0xfa, 0xd8, 0x53, 0xbd, 0x0e, 0xaf, 0x1a, 0x04, 0xd1, 0x81, 0xd6, 0x1f, 0x1a, 0x74, 0x4d, 0xcf, 0xf6, 0xcf, 0x61, 0x6c, 0xd9, 0x7f, 0x1e, 0xb3, 0x1c, 0x2e, 0x74, 0x1a, 0x37, 0xfa, 0x2a, 0x24, 0x6d, 0xc2, 0x6d, 0x54, 0xfb, 0xd7, 0x9b, 0x34, 0x87, 0xeb, 0xac, 0x38, 0xc7, 0xe3, 0xc9, 0x6a, 0x98, 0x04, 0x2b, 0x33, 0x2d, 0x87, 0xf4, 0x25, 0xd6, 0x64, 0x14, 0xe8, 0xd0, 0x84, 0x18, 0xc0, 0x39, 0x4d, 0xb5, 0xe5, 0xe2, 0xdb, 0x74, 0x59, 0x52, 0xad, 0x91, 0x1a, 0x55, 0xae, 0xa3, 0xe1, 0x73, 0x4e, 0x76, 0x14, 0x94, 0xab, 0xec, 0x69, 0xb7, 0x0c, 0xa3, 0x71, 0x14, 0x04, 0xbf, 0xf9, 0x75, 0xca, 0x2b, 0x8a, 0xa4, 0x5b, 0xe6, 0xe8, 0x61, 0x8d, 0xad, 0x1a, 0x62, 0x97, 0xaa, 0xfa, 0x3f, 0x88, 0x75, 0xcd, 0xe7, 0x29, 0x66, 0xbd, 0xcf, 0x50, 0xfd, 0x10, 0x09, 0x45, 0x2e, 0x97, 0xd5, 0x7c, 0xb4, 0x12, 0x7a, 0x5f, 0xfc, 0x1c, 0x74, 0x02, 0xf0, 0xa7, 0x98, 0xd2, 0x03, 0x86, 0x19, 0x08, 0x54, 0x3d, 0x4d, 0x88, 0x13, 0x88, 0x87, 0x26, 0x61, 0x3e, 0x88, 0xf8, 0x18, 0xcc, 0xac, 0x6f, 0xec, 0x12, 0x57, 0xfe, 0x80, 0xa3, 0xbe, 0x04, 0x39, 0x52, 0xe0, 0xc3, 0xfa, 0xed, 0x4f, 0xf5, 0x07, 0x59, 0x7e, 0xfa, 0xb9, 0x35, 0x36, 0xf2, 0x55, 0x23, 0xab, 0x15, 0x65, 0x57, 0xb2, 0xce, 0xdb, 0x63, 0xe0, 0x1f, 0x1f, 0xa5, 0xfa, 0x70, 0x2e, 0x53, 0x76, 0x20, 0x5b, 0x54, 0xc2, 0x0f, 0xe9, 0xca, 0x2c, 0x82, 0xf1, 0x30, 0x61, 0xbb, 0x99, 0x1e, 0x2a, 0xa2, 0x71, 0x91, 0x39, 0x07, 0xda, 0xcd, 0x50, 0xbb, 0x73, 0x5b, 0xa4, 0x05, 0x26, 0xee, 0x9f, 0x5e, 0x88, 0x72, 0x92, 0xc9, 0x60, 0x2b, 0xd7, 0x6a, 0x91, 0x40, 0x52, 0x6b, 0xd1, 0xab, 0x00, 0xcc, 0x60, 0x53, 0x9b, 0x36, 0x40, 0x3b, 0x60, 0x18, 0x7f, 0x5f, 0xc2, 0x8c, 0x44, 0x08, 0xae, 0x95, 0xae, 0x8c, 0xd7, 0x8d, 0x68, 0x4a, 0x42, 0x64, 0x1d, 0xdf, 0xdc, 0x17, 0x1a, 0x28, 0xe0, 0x55, 0x35, 0x00, 0x65, 0xe4, 0xd4, 0xd7, 0x3e, 0x1c, 0x6a, 0xa1, 0xbf, 0xba, 0xd8, 0x29, 0xce, 0xa6, 0x1f, 0xf9, 0x06, 0xff, 0x70, 0x43, 0xc8, 0xa0, 0x49, 0x03, 0xcd, 0x19, 0xf2, 0x16, 0x01, 0x46, 0xf0, 0x29, 0xdb, 0xc2, 0x85, 0x89, 0x20, 0x37, 0x91, 0xd3, 0x74, 0x1c, 0x38, 0x08, 0xb3, 0xd5, 0xa3, 0x4c, 0x52, 0x6e, 0xb3, 0x24, 0xc0, 0xbc, 0xd6, 0xc6, 0x64, 0x0b, 0x40, 0x44, 0xc4, 0xb9, 0x11, 0x10, 0x2a, 0xcd, 0x43, 0x99, 0x47, 0xe9, 0xfb, 0xf0, 0xe0, 0x56, 0x13, 0x40, 0x41, 0x8a, 0x41, 0xcc, 0x92, 0x8d, 0xd5, 0xb9, 0x47, 0x05, 0xc7, 0x72, 0x76, 0x02, 0x09, 0x05, 0xd9, 0x12, 0xb6, 0xa8, 0x0a, 0x86, 0x28, 0x5c, 0x41, 0x7e, 0xf1, 0xbc, 0xa9, 0x93, 0xae, 0xdf, 0x0b, 0xa1, 0xfc, 0x47, 0xb5, 0xde, 0x1c, 0x25, 0xe9, 0x8b, 0xb2, 0x03, 0x3a, 0xa7, 0x36, 0x4e, 0xcb, 0xfa, 0xcd, 0xe6, 0x4f, 0x67, 0x3f, 0xe2, 0xa3, 0x3d, 0xdb, 0x61, 0x0d, 0x99, 0x05, 0x15, 0x96, 0x14, 0x4e, 0x89, 0xf7, 0x8b, 0xdd, 0x84, 0x48, 0x35, 0xa8, 0x5c, 0x73, 0x67, 0x5d, 0x55, 0x5d, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x82, 0x80, 0x69, 0x29, 0x54, 0x97, 0xc2, 0xcd, 0x4c, 0x00, 0x00, 0x00, 0x00, 0x44, 0x07, 0x64, 0xa1, 0x66, 0xe3, 0x3c, 0x6e, 0x51, 0x96, 0x6a, 0x06, 0x8c, 0x08, 0x92, 0x24, 0x03, 0xe1, 0xc2, 0xce, 0x80, 0x56, 0x75, 0x78, 0xd3, 0xc8, 0x1d, 0x52, 0xc6, 0x32, 0xbf, 0x89, 0x91, 0x1a, 0x81, 0x9f, 0x11, 0x69, 0xd6, 0x9b, 0x27, 0x20, 0x19, 0x59, 0x12, 0x2d, 0x85, 0x7e, 0x3a, 0xed, 0xa9, 0xd7, 0x92, 0xa4, 0x2d, 0xce, 0x2f, 0xf0, 0xd4, 0x0e, 0xec, 0xe4, 0xd8, 0x0c, 0xaf, 0x1c, 0x28, 0xe8, 0x47, 0xef, 0x04, 0x61, 0x2a, 0x38, 0x94, 0x40, 0x2f, 0x92, 0x3e, 0x8a, 0xcd, 0x24, 0xfc, 0xba, 0xa6, 0x68, 0xa7, 0x2c, 0xbb, 0xc1, 0x67, 0x5f, 0x0b, 0x85, 0x75, 0x70, 0xa5, 0x03, 0x0e, 0x25, 0xe2, 0x09, 0x34, 0x78, 0x66, 0x6f, 0xe0, 0xf6, 0xac, 0xaf, 0xc6, 0x4a, 0xbc, 0xda, 0xc5, 0x06, 0x9e, 0x53, 0xe8, 0x75, 0x0b, 0x50, 0xde, 0xf7, 0xc0, 0x7f, 0x78, 0x97, 0x13, 0x22, 0x76, 0x18, 0x88, 0xf9, 0x99, 0xa1, 0x05, 0x42, 0xee, 0x40, 0xf0, 0xb7, 0x00, 0x0e, 0xf5, 0xac, 0x7c, 0xe5, 0x8b, 0x1f, 0x05, 0xe3, 0xd1, 0x9d, 0x6b, 0xd4, 0x9c, 0x3d, 0x14, 0x08, 0x21, 0xce, 0x72, 0x8f, 0x91, 0x9c, 0xba, 0xdd, 0x46, 0xcd, 0xef, 0x6d, 0x7b, 0x0d, 0x7d, 0x59, 0x91, 0x05, 0xc2, 0xde, 0x6c, 0x8a, 0x65, 0xd0, 0x97, 0xb1, 0x93, 0x9f, 0x51, 0xec, 0x79, 0x30, 0x44, 0xbd, 0xe5, 0xdf, 0x94, 0xed, 0xad, 0x18, 0xd7, 0x24, 0x89, 0x36, 0x65, 0xc5, 0x88, 0xc0, 0x9a, 0xb7, 0xaa, 0x58, 0x60, 0xfe, 0x6c, 0xe8, 0xf3, 0x39, 0x6b, 0x45, 0xe6, 0x34, 0xbc, 0x61, 0x68, 0xa2, 0x70, 0x16, 0x49, 0x8b, 0x7d, 0x78, 0x09, 0x99, 0x21, 0x5a, 0xea, 0xfd, 0xbc, 0x69, 0x23, 0xd5, 0x15, 0xd1, 0x5c, 0x32, 0x8b, 0xc0, 0x7b, 0xb2, 0x1e, 0x56, 0xf1, 0x6b, 0xd0, };
T_DECL(in_cksum_49479689a, "tests os_cpu_in_cksum with known problem packet in various random segmentation and memory alignment")
{
uint16_t dsum = dumb_in_cksum(pkt49479689, sizeof(pkt49479689));
T_ASSERT_EQ(ntohs(dsum), (uint16_t)0xa32b, "verifying dumb chksum");
test_checksum(pkt49479689, sizeof(pkt49479689));
}
T_DECL(in_cksum_49479689b, "tests os_cpu_in_cksum with many random packets in various random segmentation and memory alignment")
{
for (int i = 0; i < 100; i++) {
test_one_random_packet(4096);
}
}