1 files changed, 91 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/include/h2o/hostinfo.h b/web/server/h2o/libh2o/include/h2o/hostinfo.h
new file mode 100644
index 00000000..14ac30c6
--- /dev/null
+++ b/web/server/h2o/libh2o/include/h2o/hostinfo.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2015 DeNA Co., Ltd., Kazuho Oku
+ *
+ * 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.
+ */
+#ifndef h2o__hostinfo_h
+#define h2o__hostinfo_h
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include "h2o/multithread.h"
+
+typedef struct st_h2o_hostinfo_getaddr_req_t h2o_hostinfo_getaddr_req_t;
+
+typedef void (*h2o_hostinfo_getaddr_cb)(h2o_hostinfo_getaddr_req_t *req, const char *errstr, struct addrinfo *res, void *cbdata);
+
+extern size_t h2o_hostinfo_max_threads;
+
+/**
+ * dispatches a (possibly) asynchronous hostname lookup
+ */
+h2o_hostinfo_getaddr_req_t *h2o_hostinfo_getaddr(h2o_multithread_receiver_t *receiver, h2o_iovec_t name, h2o_iovec_t serv,
+                                                 int family, int socktype, int protocol, int flags, h2o_hostinfo_getaddr_cb cb,
+                                                 void *cbdata);
+/**
+ *
+ */
+void h2o__hostinfo_getaddr_dispatch(h2o_hostinfo_getaddr_req_t *req);
+/**
+ * cancels the request
+ */
+void h2o_hostinfo_getaddr_cancel(h2o_hostinfo_getaddr_req_t *req);
+
+/**
+ * function that receives and dispatches the responses
+ */
+void h2o_hostinfo_getaddr_receiver(h2o_multithread_receiver_t *receiver, h2o_linklist_t *messages);
+
+/**
+ * select one entry at random from the response
+ */
+static struct addrinfo *h2o_hostinfo_select_one(struct addrinfo *res);
+
+/**
+ * equiv. to inet_pton(AF_INET4)
+ */
+int h2o_hostinfo_aton(h2o_iovec_t host, struct in_addr *addr);
+
+/* inline defs */
+
+inline struct addrinfo *h2o_hostinfo_select_one(struct addrinfo *res)
+{
+    if (res->ai_next == NULL)
+        return res;
+
+    /* count the number of candidates */
+    size_t i = 0;
+    struct addrinfo *ai = res;
+    do {
+        ++i;
+    } while ((ai = ai->ai_next) != NULL);
+
+    /* choose one, distributed by rand() :-p */
+    i = rand() % i;
+    for (ai = res; i != 0; ai = ai->ai_next, --i)
+        ;
+    return ai;
+}
+
+#endif