Thank you. That's did help me. -GHui
------------------ Original ------------------ From: "Yann Ylavic";<[email protected]>; Send time: Tuesday, Feb 3, 2015 5:18 PM To: "GHui"<[email protected]>; Cc: "dev"<[email protected]>; Subject: Re: apr_getnameinfo get localhost Hi GHui, as you can see, apr_getnameinfo() does not give a different answer than the system's one. Address 172.18.4.2 really resolves to localhost in your environment, whereas 172.18.4.3 is unknow. You will have to take a look at your DNS (172.18.0.1) configuration. Regards, Yann. On Tue, Feb 3, 2015 at 6:57 AM, GHui <[email protected]> wrote: > The following is the log when I execute the command. > ----------------------- > [root@myHOST ~]# nslookup 172.18.4.2 > Server: 172.18.0.1 > Address: 172.18.0.1#53 > > Non-authoritative answer: > 2.4.18.172.in-addr.arpa name = localhost. > > Authoritative answers can be found from: > > [root@myHOST ~]# nslookup 172.18.4.3 > Server: 172.18.0.1 > Address: 172.18.0.1#53 > > ** server can't find 3.4.18.172.in-addr.arpa.: NXDOMAIN > > [root@myHOST ~]# ./hostname 172.18.4.2 >>><<IP: 172.18.4.2 >>><<HOST: localhost > [root@myHOST ~]# ./hostname 172.18.4.3 >>><<IP: 172.18.4.3 >>><<HOST: (null) > [root@myHOST ~]# > > ------------------ Original ------------------ > From: "Yann Ylavic";<[email protected]>; > Send time: Monday, Feb 2, 2015 5:03 PM > To: "apr"<[email protected]>; > Subject: Re: apr_getnameinfo get localhost > > Oups, meant to send my reply to the list... > > On Mon, Feb 2, 2015 at 10:01 AM, Yann Ylavic <[email protected]> wrote: >> What does nslookup (or alike) output for these IPs ? >> >> On Mon, Feb 2, 2015 at 9:41 AM, GHui <[email protected]> wrote: >>> >>> There is some error, so I resend again. >>> >>> [root@myHOST ~]# ./hostname 172.18.4.49 >>>>><<IP: 172.18.4.49 >>>>><<HOST: (null) >>> [root@myHOST ~]# ./hostname 172.18.4.48 >>>>><<IP: 172.18.4.48 >>>>><<HOST: localhost >>> >>> Note: The 172.18.4.49 and 172.18.4.48 are not in /etc/hosts. >>> >>> >>> >>> ------------------ Original ------------------ >>> From: "Joshua Marantz";<[email protected]>; >>> Send time: Sunday, Feb 1, 2015 10:56 PM >>> To: "GHui"<[email protected]>; >>> Cc: "Jeff Trawick"<[email protected]>; "dev"<[email protected]>; >>> Subject: Re: apr_getnameinfo get localhost >>> >>> I am not an expert in this apr routine, but I think it might help if you >>> gave the command-line argument you used when testing your program. >>> >>> -Josh >>> >>> On Sun, Feb 1, 2015 at 7:17 AM, GHui <[email protected]> wrote: >>>> >>>> >>>> Is there any good news? Any help will be appreciated. >>>> >>>> --GHui >>>> >>>> >>>> ------------------ Original ------------------ >>>> From: "ugiwgh";<[email protected]>; >>>> Send time: Thursday, Jan 29, 2015 9:03 AM >>>> To: "Jeff Trawick"<[email protected]>; >>>> Cc: "dev"<[email protected]>; >>>> Subject: Re: apr_getnameinfo get localhost >>>> >>>> >>>> From: "Jeff Trawick";<[email protected]>; Send time: Wednesday, Jan 28, >>>> 2015 10:26 PM >>>> On Wed, Jan 28, 2015 at 2:26 AM, GHui <[email protected]> wrote: >>>>> >>>>> I used the function apr_getnameinfo to get remote hostname. But it >>>>> return "localhost". >>>>> I don't know why this happend. >>>>> Any help will be appreciated. >>>>> --GHui >>>> >>>> >>>> Please show code, such as where the second parameter to >>>> apr_getnameinfo() >>>> came from. >>>> -- >>>> Born in Roswell... married an alien... >>>> http://emptyhammock.com/ >>>> >>>> >>>> The code is following. >>>> --------------------------------------------- >>>> int main(int argc,char **argv) >>>> { >>>> if(2!=argc) >>>> { >>>> printf("Usage: %s <ip>\n",argv[0]); >>>> return 1; >>>> } >>>> char *remoteip=argv[1]; >>>> printf(">><<IP: %s\n",remoteip); >>>> apr_initialize(); >>>> apr_pool_t *mp; >>>> apr_pool_create(&mp,NULL); >>>> apr_sockaddr_t *sa; >>>> apr_sockaddr_info_get(&sa,remoteip,APR_INET,10089,0,mp); >>>> char *hostname=NULL; >>>> apr_getnameinfo(&hostname,sa,0); >>>> printf(">><<HOST: %s\n",hostname); >>>> >>>> apr_terminate(); >>>> return 0; >>>> } >>>> -------------------------------------------- >>> >>>
