55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
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/*
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* $smu-mark$
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* $name: gethostname.c$
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* $author: Salvatore Sanfilippo <antirez@invece.org>$
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* $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
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* $license: This software is under GPL version 2 of license$
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* $date: Fri Nov 5 11:55:47 MET 1999$
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* $rev: 8$
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*/
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#include <stdio.h>
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#include <netdb.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "hping2.h"
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#include "globals.h"
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size_t strlcpy(char *dst, const char *src, size_t siz);
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char *get_hostname(const char* addr)
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{
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static char answer[1024];
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static char lastreq[1024] = {'\0'}; /* last request */
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struct hostent *he;
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struct in6_addr naddr6;
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static char *last_answerp = NULL;
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printf(" get hostname..."); fflush(stdout);
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printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
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" "
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"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
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if (!strcmp(addr, lastreq))
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return last_answerp;
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strlcpy(lastreq, addr, 1024);
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inet_pton(opt_af, addr, &naddr6);
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he = gethostbyaddr((char*)&naddr6, sizeof(naddr6), opt_af);
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if (he == NULL) {
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last_answerp = NULL;
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return NULL;
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}
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strlcpy(answer, he->h_name, 1024);
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last_answerp = answer;
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return answer;
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}
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