42 lines
2.6 KiB
C
42 lines
2.6 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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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dns/dns.h"
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#include "libc/macros.h"
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#include "libc/mem/mem.h"
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#include "libc/sock/sock.h"
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#include "libc/sysv/consts/af.h"
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struct addrinfo *newaddrinfo(uint16_t port) {
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void *mem;
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struct addrinfo *ai = NULL;
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/* shoehorning is ok since this'll never be realloc()'d */
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uint32_t size = ROUNDUP(sizeof(struct addrinfo), sizeof(void *));
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uint32_t addrlen = sizeof(struct sockaddr_in);
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if ((ai = mem = calloc(1, size + addrlen + DNS_NAME_MAX + 1))) {
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ai->ai_family = AF_INET;
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ai->ai_addrlen = addrlen;
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ai->ai_addr4 = (struct sockaddr_in *)((char *)mem + size);
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ai->ai_addr4->sin_family = AF_INET;
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ai->ai_addr4->sin_port = htons(port);
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ai->ai_canonname = (char *)mem + size + addrlen;
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}
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return ai;
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}
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