1 files changed, 117 insertions, 0 deletions
diff --git a/lib/ngtcp2_addr.c b/lib/ngtcp2_addr.c
new file mode 100644
index 0000000..f389abe
--- /dev/null
+++ b/lib/ngtcp2_addr.c
@@ -0,0 +1,117 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2019 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_addr.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "ngtcp2_unreachable.h"
+
+ngtcp2_addr *ngtcp2_addr_init(ngtcp2_addr *dest, const ngtcp2_sockaddr *addr,
+                              ngtcp2_socklen addrlen) {
+  dest->addrlen = addrlen;
+  dest->addr = (ngtcp2_sockaddr *)addr;
+  return dest;
+}
+
+void ngtcp2_addr_copy(ngtcp2_addr *dest, const ngtcp2_addr *src) {
+  dest->addrlen = src->addrlen;
+  if (src->addrlen) {
+    memcpy(dest->addr, src->addr, (size_t)src->addrlen);
+  }
+}
+
+void ngtcp2_addr_copy_byte(ngtcp2_addr *dest, const ngtcp2_sockaddr *addr,
+                           ngtcp2_socklen addrlen) {
+  dest->addrlen = addrlen;
+  if (addrlen) {
+    memcpy(dest->addr, addr, (size_t)addrlen);
+  }
+}
+
+static int sockaddr_eq(const ngtcp2_sockaddr *a, const ngtcp2_sockaddr *b) {
+  assert(a->sa_family == b->sa_family);
+
+  switch (a->sa_family) {
+  case NGTCP2_AF_INET: {
+    const ngtcp2_sockaddr_in *ai = (const ngtcp2_sockaddr_in *)(void *)a,
+                             *bi = (const ngtcp2_sockaddr_in *)(void *)b;
+    return ai->sin_port == bi->sin_port &&
+           memcmp(&ai->sin_addr, &bi->sin_addr, sizeof(ai->sin_addr)) == 0;
+  }
+  case NGTCP2_AF_INET6: {
+    const ngtcp2_sockaddr_in6 *ai = (const ngtcp2_sockaddr_in6 *)(void *)a,
+                              *bi = (const ngtcp2_sockaddr_in6 *)(void *)b;
+    return ai->sin6_port == bi->sin6_port &&
+           memcmp(&ai->sin6_addr, &bi->sin6_addr, sizeof(ai->sin6_addr)) == 0;
+  }
+  default:
+    ngtcp2_unreachable();
+  }
+}
+
+int ngtcp2_addr_eq(const ngtcp2_addr *a, const ngtcp2_addr *b) {
+  return a->addr->sa_family == b->addr->sa_family &&
+         sockaddr_eq(a->addr, b->addr);
+}
+
+uint32_t ngtcp2_addr_compare(const ngtcp2_addr *aa, const ngtcp2_addr *bb) {
+  uint32_t flags = NGTCP2_ADDR_COMPARE_FLAG_NONE;
+  const ngtcp2_sockaddr *a = aa->addr;
+  const ngtcp2_sockaddr *b = bb->addr;
+
+  if (a->sa_family != b->sa_family) {
+    return NGTCP2_ADDR_COMPARE_FLAG_FAMILY;
+  }
+
+  switch (a->sa_family) {
+  case NGTCP2_AF_INET: {
+    const ngtcp2_sockaddr_in *ai = (const ngtcp2_sockaddr_in *)(void *)a,
+                             *bi = (const ngtcp2_sockaddr_in *)(void *)b;
+    if (memcmp(&ai->sin_addr, &bi->sin_addr, sizeof(ai->sin_addr))) {
+      flags |= NGTCP2_ADDR_COMPARE_FLAG_ADDR;
+    }
+    if (ai->sin_port != bi->sin_port) {
+      flags |= NGTCP2_ADDR_COMPARE_FLAG_PORT;
+    }
+    return flags;
+  }
+  case NGTCP2_AF_INET6: {
+    const ngtcp2_sockaddr_in6 *ai = (const ngtcp2_sockaddr_in6 *)(void *)a,
+                              *bi = (const ngtcp2_sockaddr_in6 *)(void *)b;
+    if (memcmp(&ai->sin6_addr, &bi->sin6_addr, sizeof(ai->sin6_addr))) {
+      flags |= NGTCP2_ADDR_COMPARE_FLAG_ADDR;
+    }
+    if (ai->sin6_port != bi->sin6_port) {
+      flags |= NGTCP2_ADDR_COMPARE_FLAG_PORT;
+    }
+    return flags;
+  }
+  default:
+    ngtcp2_unreachable();
+  }
+}
+
+int ngtcp2_addr_empty(const ngtcp2_addr *addr) { return addr->addrlen == 0; }