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3fe7b95fd0
gethostbyname, gethostbyaddr follow simple implementations: they internally call getaddrinfo and getnameinfo respectively, and fill out the minimum details. remaining functions are stubs.
70 lines
3.7 KiB
C
70 lines
3.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ This is free and unencumbered software released into the public domain. │
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│ │
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│ Anyone is free to copy, modify, publish, use, compile, sell, or │
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│ distribute this software, either in source code form or as a compiled │
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│ binary, for any purpose, commercial or non-commercial, and by any │
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│ means. │
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│ │
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│ In jurisdictions that recognize copyright laws, the author or authors │
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│ of this software dedicate any and all copyright interest in the │
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│ software to the public domain. We make this dedication for the benefit │
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│ of the public at large and to the detriment of our heirs and │
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│ successors. We intend this dedication to be an overt act of │
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│ relinquishment in perpetuity of all present and future rights to this │
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│ software under copyright law. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
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│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
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│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
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│ OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dns/ent.h"
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#include "libc/mem/mem.h"
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#include "libc/sysv/consts/af.h"
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struct hostent *gethostbyaddr(const void *s_addr, socklen_t len, int type) {
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static struct hostent *ptr1, he1;
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struct sockaddr_in addr;
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char name[DNS_NAME_MAX + 1];
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if (!ptr1) {
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he1.h_name = NULL;
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he1.h_aliases = (char **)malloc(sizeof(char *) * 1);
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if (!he1.h_aliases) return NULL;
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he1.h_aliases[0] = NULL;
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he1.h_addrtype = AF_INET;
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he1.h_length = 4;
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he1.h_addr_list = (char **)malloc(sizeof(char *) * 2);
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if (!he1.h_addr_list) return NULL;
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he1.h_addr_list[0] = (char *)malloc(sizeof(uint32_t));
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if (!he1.h_addr_list[0]) return NULL;
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he1.h_addr_list[1] = NULL;
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ptr1 = &he1;
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}
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if (type != AF_INET || len != sizeof(uint32_t)) return NULL;
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addr.sin_family = AF_INET;
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addr.sin_port = 0;
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addr.sin_addr.s_addr = *(uint32_t *)(s_addr);
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if (getnameinfo((struct sockaddr *)&addr, sizeof(addr), name, sizeof(name),
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NULL, 0, 0))
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return NULL;
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if (ptr1->h_name) free(ptr1->h_name);
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ptr1->h_name = strdup(name);
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*((uint32_t *)ptr1->h_addr_list[0]) = (addr.sin_addr.s_addr);
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return ptr1;
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}
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