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Annotation of embedaddon/hping2/gethostname.c, revision 1.1

1.1     ! misho       1: /* 
        !             2:  * $smu-mark$ 
        !             3:  * $name: gethostname.c$ 
        !             4:  * $author: Salvatore Sanfilippo <antirez@invece.org>$ 
        !             5:  * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$ 
        !             6:  * $license: This software is under GPL version 2 of license$ 
        !             7:  * $date: Fri Nov  5 11:55:47 MET 1999$ 
        !             8:  * $rev: 8$ 
        !             9:  */ 
        !            10: 
        !            11: #include <stdio.h>
        !            12: #include <netdb.h>
        !            13: #include <sys/types.h>
        !            14: #include <sys/socket.h>
        !            15: #include <netinet/in.h>
        !            16: #include <arpa/inet.h>
        !            17: #include <string.h>
        !            18: 
        !            19: size_t strlcpy(char *dst, const char *src, size_t siz);
        !            20: 
        !            21: char *get_hostname(char* addr)
        !            22: {
        !            23:        static char answer[1024];
        !            24:        static char lastreq[1024] = {'\0'};     /* last request */
        !            25:        struct hostent *he;
        !            26:        struct in_addr naddr;
        !            27:        static char *last_answerp = NULL;
        !            28: 
        !            29:        printf(" get hostname..."); fflush(stdout);
        !            30:        printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
        !            31:                "               "
        !            32:                "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
        !            33: 
        !            34:        if (!strcmp(addr, lastreq))
        !            35:                return last_answerp;
        !            36: 
        !            37:        strlcpy(lastreq, addr, 1024);
        !            38:        inet_aton(addr, &naddr);
        !            39:        he = gethostbyaddr((char*)&naddr, 4, AF_INET);
        !            40: 
        !            41:        if (he == NULL) {
        !            42:                last_answerp = NULL;
        !            43:                return NULL;
        !            44:        }
        !            45: 
        !            46:        strlcpy(answer, he->h_name, 1024);
        !            47:        last_answerp = answer;
        !            48: 
        !            49:        return answer;
        !            50: }
        !            51: