1 files changed, 291 insertions, 0 deletions
diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_conv.c b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_conv.c
new file mode 100644
index 0000000..3367217
--- /dev/null
+++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_conv.c
@@ -0,0 +1,291 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2017 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "ngtcp2_conv.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "ngtcp2_str.h"
+#include "ngtcp2_pkt.h"
+#include "ngtcp2_net.h"
+#include "ngtcp2_unreachable.h"
+
+const uint8_t *ngtcp2_get_uint64(uint64_t *dest, const uint8_t *p) {
+  uint64_t n;
+  memcpy(&n, p, sizeof(n));
+  *dest = ngtcp2_ntohl64(n);
+  return p + sizeof(n);
+}
+
+const uint8_t *ngtcp2_get_uint48(uint64_t *dest, const uint8_t *p) {
+  uint64_t n = 0;
+  memcpy(((uint8_t *)&n) + 2, p, 6);
+  *dest = ngtcp2_ntohl64(n);
+  return p + 6;
+}
+
+const uint8_t *ngtcp2_get_uint32(uint32_t *dest, const uint8_t *p) {
+  uint32_t n;
+  memcpy(&n, p, sizeof(n));
+  *dest = ngtcp2_ntohl(n);
+  return p + sizeof(n);
+}
+
+const uint8_t *ngtcp2_get_uint24(uint32_t *dest, const uint8_t *p) {
+  uint32_t n = 0;
+  memcpy(((uint8_t *)&n) + 1, p, 3);
+  *dest = ngtcp2_ntohl(n);
+  return p + 3;
+}
+
+const uint8_t *ngtcp2_get_uint16(uint16_t *dest, const uint8_t *p) {
+  uint16_t n;
+  memcpy(&n, p, sizeof(n));
+  *dest = ngtcp2_ntohs(n);
+  return p + sizeof(n);
+}
+
+const uint8_t *ngtcp2_get_uint16be(uint16_t *dest, const uint8_t *p) {
+  memcpy(dest, p, sizeof(*dest));
+  return p + sizeof(*dest);
+}
+
+static uint64_t get_uvarint(size_t *plen, const uint8_t *p) {
+  union {
+    uint8_t n8;
+    uint16_t n16;
+    uint32_t n32;
+    uint64_t n64;
+  } n;
+
+  *plen = (size_t)(1u << (*p >> 6));
+
+  switch (*plen) {
+  case 1:
+    return *p;
+  case 2:
+    memcpy(&n, p, 2);
+    n.n8 &= 0x3f;
+    return ngtcp2_ntohs(n.n16);
+  case 4:
+    memcpy(&n, p, 4);
+    n.n8 &= 0x3f;
+    return ngtcp2_ntohl(n.n32);
+  case 8:
+    memcpy(&n, p, 8);
+    n.n8 &= 0x3f;
+    return ngtcp2_ntohl64(n.n64);
+  default:
+    ngtcp2_unreachable();
+  }
+}
+
+const uint8_t *ngtcp2_get_uvarint(uint64_t *dest, const uint8_t *p) {
+  size_t len;
+
+  *dest = get_uvarint(&len, p);
+
+  return p + len;
+}
+
+const uint8_t *ngtcp2_get_varint(int64_t *dest, const uint8_t *p) {
+  size_t len;
+
+  *dest = (int64_t)get_uvarint(&len, p);
+
+  return p + len;
+}
+
+int64_t ngtcp2_get_pkt_num(const uint8_t *p, size_t pkt_numlen) {
+  uint32_t l;
+  uint16_t s;
+
+  switch (pkt_numlen) {
+  case 1:
+    return *p;
+  case 2:
+    ngtcp2_get_uint16(&s, p);
+    return (int64_t)s;
+  case 3:
+    ngtcp2_get_uint24(&l, p);
+    return (int64_t)l;
+  case 4:
+    ngtcp2_get_uint32(&l, p);
+    return (int64_t)l;
+  default:
+    ngtcp2_unreachable();
+  }
+}
+
+uint8_t *ngtcp2_put_uint64be(uint8_t *p, uint64_t n) {
+  n = ngtcp2_htonl64(n);
+  return ngtcp2_cpymem(p, (const uint8_t *)&n, sizeof(n));
+}
+
+uint8_t *ngtcp2_put_uint48be(uint8_t *p, uint64_t n) {
+  n = ngtcp2_htonl64(n);
+  return ngtcp2_cpymem(p, ((const uint8_t *)&n) + 2, 6);
+}
+
+uint8_t *ngtcp2_put_uint32be(uint8_t *p, uint32_t n) {
+  n = ngtcp2_htonl(n);
+  return ngtcp2_cpymem(p, (const uint8_t *)&n, sizeof(n));
+}
+
+uint8_t *ngtcp2_put_uint24be(uint8_t *p, uint32_t n) {
+  n = ngtcp2_htonl(n);
+  return ngtcp2_cpymem(p, ((const uint8_t *)&n) + 1, 3);
+}
+
+uint8_t *ngtcp2_put_uint16be(uint8_t *p, uint16_t n) {
+  n = ngtcp2_htons(n);
+  return ngtcp2_cpymem(p, (const uint8_t *)&n, sizeof(n));
+}
+
+uint8_t *ngtcp2_put_uint16(uint8_t *p, uint16_t n) {
+  return ngtcp2_cpymem(p, (const uint8_t *)&n, sizeof(n));
+}
+
+uint8_t *ngtcp2_put_uvarint(uint8_t *p, uint64_t n) {
+  uint8_t *rv;
+  if (n < 64) {
+    *p++ = (uint8_t)n;
+    return p;
+  }
+  if (n < 16384) {
+    rv = ngtcp2_put_uint16be(p, (uint16_t)n);
+    *p |= 0x40;
+    return rv;
+  }
+  if (n < 1073741824) {
+    rv = ngtcp2_put_uint32be(p, (uint32_t)n);
+    *p |= 0x80;
+    return rv;
+  }
+  assert(n < 4611686018427387904ULL);
+  rv = ngtcp2_put_uint64be(p, n);
+  *p |= 0xc0;
+  return rv;
+}
+
+uint8_t *ngtcp2_put_uvarint30(uint8_t *p, uint32_t n) {
+  uint8_t *rv;
+
+  assert(n < 1073741824);
+
+  rv = ngtcp2_put_uint32be(p, n);
+  *p |= 0x80;
+
+  return rv;
+}
+
+uint8_t *ngtcp2_put_pkt_num(uint8_t *p, int64_t pkt_num, size_t len) {
+  switch (len) {
+  case 1:
+    *p++ = (uint8_t)pkt_num;
+    return p;
+  case 2:
+    ngtcp2_put_uint16be(p, (uint16_t)pkt_num);
+    return p + 2;
+  case 3:
+    ngtcp2_put_uint24be(p, (uint32_t)pkt_num);
+    return p + 3;
+  case 4:
+    ngtcp2_put_uint32be(p, (uint32_t)pkt_num);
+    return p + 4;
+  default:
+    ngtcp2_unreachable();
+  }
+}
+
+size_t ngtcp2_get_uvarintlen(const uint8_t *p) {
+  return (size_t)(1u << (*p >> 6));
+}
+
+size_t ngtcp2_put_uvarintlen(uint64_t n) {
+  if (n < 64) {
+    return 1;
+  }
+  if (n < 16384) {
+    return 2;
+  }
+  if (n < 1073741824) {
+    return 4;
+  }
+  assert(n < 4611686018427387904ULL);
+  return 8;
+}
+
+int64_t ngtcp2_nth_server_bidi_id(uint64_t n) {
+  if (n == 0) {
+    return 0;
+  }
+
+  if ((NGTCP2_MAX_VARINT >> 2) < n - 1) {
+    return NGTCP2_MAX_SERVER_STREAM_ID_BIDI;
+  }
+
+  return (int64_t)(((n - 1) << 2) | 0x01);
+}
+
+int64_t ngtcp2_nth_client_bidi_id(uint64_t n) {
+  if (n == 0) {
+    return 0;
+  }
+
+  if ((NGTCP2_MAX_VARINT >> 2) < n - 1) {
+    return NGTCP2_MAX_CLIENT_STREAM_ID_BIDI;
+  }
+
+  return (int64_t)((n - 1) << 2);
+}
+
+int64_t ngtcp2_nth_server_uni_id(uint64_t n) {
+  if (n == 0) {
+    return 0;
+  }
+
+  if ((NGTCP2_MAX_VARINT >> 2) < n - 1) {
+    return NGTCP2_MAX_SERVER_STREAM_ID_UNI;
+  }
+
+  return (int64_t)(((n - 1) << 2) | 0x03);
+}
+
+int64_t ngtcp2_nth_client_uni_id(uint64_t n) {
+  if (n == 0) {
+    return 0;
+  }
+
+  if ((NGTCP2_MAX_VARINT >> 2) < n - 1) {
+    return NGTCP2_MAX_CLIENT_STREAM_ID_UNI;
+  }
+
+  return (int64_t)(((n - 1) << 2) | 0x02);
+}
+
+uint64_t ngtcp2_ord_stream_id(int64_t stream_id) {
+  return (uint64_t)(stream_id >> 2) + 1;
+}