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  • Committer: Bazaar Package Importer
  • Author(s): Matt Zimmerman
  • Date: 2004-10-11 16:10:27 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20041011161027-icyjbji8ujym633o
Tags: 1:4.2.0a-10ubuntu2
Use ntp.ubuntulinux.org instead of pool.ntp.org

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arlib/sample.c
 
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#include <stdio.h>
 
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#include <strings.h>
 
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#include <errno.h>
 
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#include <sys/types.h>
 
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#include <sys/time.h>
 
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#include <netinet/in.h>
 
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#include <netdb.h>
 
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#include "arlib.h"
 
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#ifndef lint
 
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static  char    sccsid[] = "@(#)sample.c        1.1 12/21/92 (C)1992 Darren Reed. ASYNC DNS";
 
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#endif
 
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char    line[512];
 
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int     lookup = 0, seq = 0;
 
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long    expire = 0;
 
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main()
 
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{
 
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        struct  in_addr adr;
 
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        struct  timeval tv2;
 
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        fd_set  rd;
 
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        long    now;
 
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        char    *s;
 
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        int     afd, nfd, pid = getpid(), del;
 
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        afd = ar_init(ARES_INITLIST|ARES_CALLINIT|ARES_INITSOCK);
 
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        (void)printf("afd = %d pid = %d\n",afd, pid);
 
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        while (1)
 
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        {
 
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                (void)printf("Host =>");
 
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                (void)fflush(stdout);
 
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                *line = '\0';
 
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                FD_ZERO(&rd);
 
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                FD_SET(0,&rd);
 
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                FD_SET(afd,&rd);
 
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                now = time(NULL);
 
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                if (expire >= now)
 
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                    {
 
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                        tv2.tv_usec = 0;
 
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                        tv2.tv_sec = expire - now;
 
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                        nfd = select(FD_SETSIZE, &rd, NULL, NULL, &tv2);
 
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                    }
 
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                else
 
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                        nfd = select(FD_SETSIZE, &rd, NULL, NULL, NULL);
 
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                if (FD_ISSET(0, &rd))
 
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                {
 
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                        if (!fgets(line, sizeof(line) - 1, stdin))
 
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                                exit(0);
 
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                        if (s = index(line, '\n'))
 
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                                *s = '\0';
 
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                }
 
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                if (isalpha(*line))
 
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                {
 
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                        (void)printf("Asking about [%s] #%d.\n",line, ++seq);
 
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                        (void)ar_gethostbyname(line, (char *)&seq,
 
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                                               sizeof(seq));
 
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                        lookup++;
 
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                }
 
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                else if (isdigit(*line))
 
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                {
 
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                        (void)printf("Asking about IP#[%s] #%d.\n",
 
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                                line, ++seq);
 
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                        adr.s_addr = inet_addr(line);
 
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                        (void)ar_gethostbyaddr(&adr, (char *)&seq,
 
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                                               sizeof(seq));
 
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                        lookup++;
 
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                }
 
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                if (lookup)
 
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                        (void)printf("Waiting for answer:\n");
 
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                if (FD_ISSET(afd, &rd))
 
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                        (void)waitonlookup(afd);
 
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                del = 0;
 
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                expire = ar_timeout(time(NULL), &del, sizeof(del));
 
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                if (del)
 
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                {
 
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                        (void)fprintf(stderr,"#%d failed\n", del);
 
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                        lookup--;
 
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                }
 
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        }
 
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}
 
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printhostent(hp)
 
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struct hostent *hp;
 
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{
 
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        struct in_addr ip;
 
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        int i;
 
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        (void)printf("hname = %s\n", hp->h_name);
 
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        for (i = 0; hp->h_aliases[i]; i++)
 
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                (void)printf("alias %d = %s\n", i+1, hp->h_aliases[i]);
 
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        for (i = 0; hp->h_addr_list[i]; i++)
 
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        {
 
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                bcopy(hp->h_addr_list[i], (char *)&ip, sizeof(ip));
 
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                (void)printf("IP# %d = %s\n", i+1, inet_ntoa(ip));
 
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        }
 
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}
 
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int     waitonlookup(afd)
 
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int     afd;
 
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{
 
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        struct  timeval delay;
 
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        struct  hostent *hp;
 
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        fd_set  rd;
 
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        long    now;
 
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        int     nfd, del;
 
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waitloop:
 
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        FD_ZERO(&rd);
 
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        now = time(NULL);
 
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        if (expire >= now)
 
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                delay.tv_sec = expire - now;
 
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        else
 
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                delay.tv_sec = 1;
 
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        delay.tv_usec = 0;
 
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        FD_SET(afd, &rd);
 
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        FD_SET(0, &rd);
 
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        nfd = select(FD_SETSIZE, &rd, 0, 0, &delay);
 
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        if (nfd == 0)
 
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                return 0;
 
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        else if (FD_ISSET(afd, &rd))
 
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        {
 
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                del = 0;
 
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                hp = ar_answer(&del, sizeof(del));
 
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                (void)printf("hp=%x seq=%d\n",hp,del);
 
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                if (hp)
 
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                    {
 
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                        (void)printhostent(hp);
 
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                        if (!--lookup)
 
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                                return 1;
 
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                    }
 
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        }
 
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        if (FD_ISSET(0, &rd))
 
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                return 2;
 
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        return 0;
 
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}