/usr/include/h2o/hostinfo.h is in libh2o-dev-common 2.2.4+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* 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
|