mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
58 lines
3.4 KiB
C
58 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ This is free and unencumbered software released into the public domain. │
|
|
│ │
|
|
│ Anyone is free to copy, modify, publish, use, compile, sell, or │
|
|
│ distribute this software, either in source code form or as a compiled │
|
|
│ binary, for any purpose, commercial or non-commercial, and by any │
|
|
│ means. │
|
|
│ │
|
|
│ In jurisdictions that recognize copyright laws, the author or authors │
|
|
│ of this software dedicate any and all copyright interest in the │
|
|
│ software to the public domain. We make this dedication for the benefit │
|
|
│ of the public at large and to the detriment of our heirs and │
|
|
│ successors. We intend this dedication to be an overt act of │
|
|
│ relinquishment in perpetuity of all present and future rights to this │
|
|
│ software under copyright law. │
|
|
│ │
|
|
│ 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 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 "libc/dns/ent.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/sysv/consts/af.h"
|
|
|
|
struct hostent *gethostbyaddr(const void *s_addr, uint32_t len, int type) {
|
|
static struct hostent *ptr1, he1;
|
|
static char h_name[DNS_NAME_MAX + 1];
|
|
static char *h_aliases[1];
|
|
static char *h_addr_list[2];
|
|
static char h_addr_list0[4];
|
|
struct sockaddr_in addr;
|
|
if (!ptr1) {
|
|
he1.h_name = h_name;
|
|
he1.h_aliases = h_aliases;
|
|
he1.h_aliases[0] = NULL;
|
|
he1.h_addrtype = AF_INET;
|
|
he1.h_length = 4;
|
|
he1.h_addr_list = h_addr_list;
|
|
he1.h_addr_list[0] = h_addr_list0;
|
|
he1.h_addr_list[1] = NULL;
|
|
ptr1 = &he1;
|
|
}
|
|
if (type != AF_INET || len != sizeof(uint32_t)) return NULL;
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = 0;
|
|
addr.sin_addr.s_addr = *(uint32_t *)(s_addr);
|
|
if (getnameinfo((struct sockaddr *)&addr, sizeof(addr), ptr1->h_name,
|
|
DNS_NAME_MAX, NULL, 0, 0))
|
|
return NULL;
|
|
*((uint32_t *)ptr1->h_addr_list[0]) = (addr.sin_addr.s_addr);
|
|
return ptr1;
|
|
}
|