summary: Test for bz676039 (Resolver fails to return all addresses of)
description: |
    Bug summary: Resolver fails to return all addresses of multi-homed hosts in /etc/hosts
    Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=676039

    Description:

    getaddrinfo does not return all ip addresses on first call when name resolution is done from /etc/hosts.

    This has been fixed by the following commits upstream:

    1f0398248c1c581a1203c0d294acde295b949fea
    1ce7d80ddc62d4bb3e8e4f89fbcb6fa21361733d

    1ce7d80ddc62d4bb3e8e4f89fbcb6fa21361733d is needed because nscd links in getaddrinfo. The side-effect is that a similar bug in nscd will also be fixed (upstream bug #4814).

    Private branch: private-spoyarek-ROS00401237
    Build: http://brewweb.devel.redhat.com/brew/taskinfo?taskID=3051905


    Customer has verified that the patch works

    This issue was first reported to Oracle as a problem with Java. The public link to the report can be found here:
    http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7007462

    Consider the following setup on RedHat Enterprise Linux 5.5 x64.
    1) Add the following lines to /etc/hosts:
    multihost 1.1.1.1
    multihost 2.2.2.2
    multihost 3.3.3.3

    2) Add the following line to /etc/host.conf:
    multi on

    3) Compile and execute the following program (provided by Oracle Java engineering team):

    /* This test code is to be used for demonstrating the
    * issue associated with SR 2-8229521.
    */
    #include <stdio.h>

    #include <errno.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netinet/in.h>
    #include <arpa/inet.h>
    #include <netdb.h>
    #include <string.h>
    #include <strings.h>
    #include <stdlib.h>
    #include <ctype.h>

    void dump_res(struct addrinfo * p_res){
    struct addrinfo *iter = p_res;
    while(iter != 0){
    struct sockaddr_in *addr1b;
    addr1b = (struct sockaddr_in *)iter->ai_addr;
    printf("getaddrinfo returns: %s %d %d\n", inet_ntoa(addr1b->sin_addr) , iter->ai_family, iter->ai_protocol );
    iter=iter->ai_next;
    }
    }

    int main(int argc, char *argv[]){
    if (argc != 2){
    printf("Usage prog hostname\n");
    exit(7);
    }

    struct addrinfo hints, *res;
    int error;

    bzero(&hints, sizeof(hints));
    hints.ai_flags = AI_CANONNAME;
    hints.ai_family = AF_UNSPEC;

    printf("======== RH BUG ===============\n");

    if ( (error = getaddrinfo(argv[1], NULL, &hints, &res) ) ){
    perror("getaddrinfo");
    exit(-1);
    }

    dump_res(res);
    freeaddrinfo(res);

    printf("======== WORKAROUND ===============\n");

    hints.ai_family = AF_INET;

    if ( (error = getaddrinfo(argv[1], NULL, &hints, &res) ) ){
    perror("getaddrinfo");
    exit(-1);
    }

    dump_res(res);
    freeaddrinfo(res);
    }

    4) You can see the following output from the above program:
    # ./a.out multihost
    ======== RH BUG ===============
    getaddrinfo returns: 1.1.1.1 2 6
    getaddrinfo returns: 1.1.1.1 2 17
    getaddrinfo returns: 1.1.1.1 2 0
    ======== WORKAROUND ===============
    getaddrinfo returns: 1.1.1.1 2 6
    getaddrinfo returns: 1.1.1.1 2 17
    getaddrinfo returns: 1.1.1.1 2 0
    getaddrinfo returns: 2.2.2.2 2 6
    getaddrinfo returns: 2.2.2.2 2 17
    getaddrinfo returns: 2.2.2.2 2 0
    getaddrinfo returns: 3.3.3.3 2 6
    getaddrinfo returns: 3.3.3.3 2 17
    getaddrinfo returns: 3.3.3.3 2 0


    Note that a similarly configured Ubuntu 10.10 Server (x64), provides the following - correct - output:
    $ ./a.out multihost
    ======== RH BUG ===============
    getaddrinfo returns: 1.1.1.1 2 6
    getaddrinfo returns: 1.1.1.1 2 17
    getaddrinfo returns: 1.1.1.1 2 0
    getaddrinfo returns: 2.2.2.2 2 6
    getaddrinfo returns: 2.2.2.2 2 17
    getaddrinfo returns: 2.2.2.2 2 0
    getaddrinfo returns: 3.3.3.3 2 6
    getaddrinfo returns: 3.3.3.3 2 17
    getaddrinfo returns: 3.3.3.3 2 0
    ======== WORKAROUND ===============
    getaddrinfo returns: 1.1.1.1 2 6
    getaddrinfo returns: 1.1.1.1 2 17
    getaddrinfo returns: 1.1.1.1 2 0
    getaddrinfo returns: 2.2.2.2 2 6
    getaddrinfo returns: 2.2.2.2 2 17
    getaddrinfo returns: 2.2.2.2 2 0
    getaddrinfo returns: 3.3.3.3 2 6
    getaddrinfo returns: 3.3.3.3 2 17
    getaddrinfo returns: 3.3.3.3 2 0

    In other words, hints.ai_family / hints.ai_flags for getaddrinfo are not working properly.

    According to the manual of getaddrinfo (excerpts): "AF_UNSPEC in ai_family specifies any protocol family (either IPv4 or IPv6, for example)."
contact: Miroslav Franc <mfranc@redhat.com>
component:
  - glibc
test: ./runtest.sh
framework: beakerlib
recommend:
  - glibc
  - glibc-common
  - gcc
duration: 15m
link:
  - relates: https://bugzilla.redhat.com/show_bug.cgi?id=676039
extra-summary: /tools/glibc/Regression/bz676039-Resolver-fails-to-return-all-addresses-of
extra-task: /tools/glibc/Regression/bz676039-Resolver-fails-to-return-all-addresses-of