// configure:16975: checking for getaddrinfo
// configure:17005: gcc -o conftest -O2 -I/usr/include -I/usr/pkg/include/db4 -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/db4 -I/usr/pkg/include -L/usr/src/HEAD/pkgsrc/wip_cl/python25/work/Python-2.5.2 -L/usr/lib -Wl,-R/usr/lib -L/usr/pkg/lib -Wl,-R/usr/pkg/lib conftest.c -lsocket -ldb4 >&5
// configure:17011: $? = 0
// configure:17018: result: yes
// configure:17020: checking getaddrinfo bug
// configure:17127: gcc -o conftest -O2 -I/usr/include -I/usr/pkg/include/db4 -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/db4 -I/usr/pkg/include -L/usr/src/HEAD/pkgsrc/wip_cl/python25/work/Python-2.5.2 -L/usr/lib -Wl,-R/usr/lib -L/usr/pkg/lib -Wl,-R/usr/pkg/lib conftest.c -lsocket -ldb4 >&5
// conftest.c: In function `main':
// conftest.c:185: error: storage size of `hints' isn't known
// conftest.c:191: error: `AI_PASSIVE' undeclared (first use in this function)
// conftest.c:191: error: (Each undeclared identifier is reported only once
// conftest.c:191: error: for each function it appears in.)
// conftest.c:194: warning: passing arg 4 of `getaddrinfo' from incompatible pointer type
// conftest.c:198: error: dereferencing pointer to incomplete type
// conftest.c:199: error: dereferencing pointer to incomplete type
// conftest.c:200: error: dereferencing pointer to incomplete type
// conftest.c:201: error: dereferencing pointer to incomplete type
// conftest.c:201: error: dereferencing pointer to incomplete type
// conftest.c:203: error: `NI_NUMERICHOST' undeclared (first use in this function)
// conftest.c:203: error: `NI_NUMERICSERV' undeclared (first use in this function)
// conftest.c:206: error: dereferencing pointer to incomplete type
// conftest.c:253: warning: passing arg 1 of `freeaddrinfo' from incompatible pointer type
// conftest.c:258: warning: passing arg 1 of `freeaddrinfo' from incompatible pointer type
// configure:17130: $? = 1
// configure: program exited with status 1
// configure: failed program was:
// | /* confdefs.h.  */
// | #define _GNU_SOURCE 1
// | #define _NETBSD_SOURCE 1
// | #define __BSD_VISIBLE 1
// | #define _BSD_TYPES 1
// | #define _XOPEN_SOURCE 600
// | #define _XOPEN_SOURCE_EXTENDED 1
// | #define _POSIX_C_SOURCE 200112L
// | #define Py_ENABLE_SHARED 1
// | #define STDC_HEADERS 1
// | #define HAVE_SYS_TYPES_H 1
// | #define HAVE_SYS_STAT_H 1
// | #define HAVE_STDLIB_H 1
// | #define HAVE_STRING_H 1
// | #define HAVE_MEMORY_H 1
// | #define HAVE_STRINGS_H 1
// | #define HAVE_INTTYPES_H 1
// | #define HAVE_STDINT_H 1
// | #define HAVE_UNISTD_H 1
// | #define HAVE_CURSES_H 1
// | #define HAVE_DLFCN_H 1
// | #define HAVE_ERRNO_H 1
// | #define HAVE_FCNTL_H 1
// | #define HAVE_GRP_H 1
// | #define HAVE_LIBINTL_H 1
// | #define HAVE_NCURSES_H 1
// | #define HAVE_POLL_H 1
// | #define HAVE_PROCESS_H 1
// | #define HAVE_PTHREAD_H 1
// | #define HAVE_SHADOW_H 1
// | #define HAVE_SIGNAL_H 1
// | #define HAVE_STDINT_H 1
// | #define HAVE_TERMIOS_H 1
// | #define HAVE_UNISTD_H 1
// | #define HAVE_UTIME_H 1
// | #define HAVE_SYS_FILE_H 1
// | #define HAVE_SYS_MODEM_H 1
// | #define HAVE_SYS_PARAM_H 1
// | #define HAVE_SYS_POLL_H 1
// | #define HAVE_SYS_SELECT_H 1
// | #define HAVE_SYS_SOCKET_H 1
// | #define HAVE_SYS_STATVFS_H 1
// | #define HAVE_SYS_STAT_H 1
// | #define HAVE_SYS_TIME_H 1
// | #define HAVE_SYS_TIMES_H 1
// | #define HAVE_SYS_TYPES_H 1
// | #define HAVE_SYS_UN_H 1
// | #define HAVE_SYS_UTSNAME_H 1
// | #define HAVE_SYS_WAIT_H 1
// | #define HAVE_SYS_RESOURCE_H 1
// | #define HAVE_DIRENT_H 1
// | #define _LARGEFILE_SOURCE 1
// | #define _FILE_OFFSET_BITS 64
// | #if defined(SCO_DS)
// | #undef _OFF_T
// | #endif
// | #define RETSIGTYPE void
// | #define HAVE_SSIZE_T 1
// | #define SIZEOF_INT 4
// | #define SIZEOF_LONG 4
// | #define SIZEOF_VOID_P 4
// | #define SIZEOF_SHORT 2
// | #define SIZEOF_FLOAT 4
// | #define SIZEOF_DOUBLE 8
// | #define SIZEOF_FPOS_T 16
// | #define SIZEOF_SIZE_T 4
// | #define HAVE_LONG_LONG 1
// | #define SIZEOF_LONG_LONG 8
// | #define HAVE_UINTPTR_T 1
// | #define SIZEOF_UINTPTR_T 4
// | #define SIZEOF_OFF_T 8
// | #define HAVE_LARGEFILE_SUPPORT 1
// | #define SIZEOF_TIME_T 4
// | #define SIZEOF_PTHREAD_T 4
// | #define SHLIB_EXT ".so"
// | #define WITH_LIBINTL 1
// | #define WITH_THREAD 1
// | #define _REENTRANT 1
// | #define PTHREAD_SYSTEM_SCHED_SUPPORTED 1
// | #define HAVE_PTHREAD_SIGMASK 1
// | #define WITH_DOC_STRINGS 1
// | #define WITH_PYMALLOC 1
// | #define HAVE_DLOPEN 1
// | #define HAVE_DYNAMIC_LOADING 1
// | #define HAVE_ALARM 1
// | #define HAVE_CHOWN 1
// | #define HAVE_CLOCK 1
// | #define HAVE_CONFSTR 1
// | #define HAVE_CTERMID 1
// | #define HAVE_EXECV 1
// | #define HAVE_FORK 1
// | #define HAVE_FPATHCONF 1
// | #define HAVE_FTIME 1
// | #define HAVE_FTRUNCATE 1
// | #define HAVE_GAI_STRERROR 1
// | #define HAVE_GETGROUPS 1
// | #define HAVE_GETLOGIN 1
// | #define HAVE_GETPEERNAME 1
// | #define HAVE_GETPGID 1
// | #define HAVE_GETPID 1
// | #define HAVE_GETPRIORITY 1
// | #define HAVE_GETPWENT 1
// | #define HAVE_GETSPNAM 1
// | #define HAVE_GETSPENT 1
// | #define HAVE_GETSID 1
// | #define HAVE_GETWD 1
// | #define HAVE_KILL 1
// | #define HAVE_KILLPG 1
// | #define HAVE_LCHOWN 1
// | #define HAVE_LSTAT 1
// | #define HAVE_MKFIFO 1
// | #define HAVE_MKNOD 1
// | #define HAVE_MKTIME 1
// | #define HAVE_NICE 1
// | #define HAVE_PATHCONF 1
// | #define HAVE_PAUSE 1
// | #define HAVE_POLL 1
// | #define HAVE_PUTENV 1
// | #define HAVE_READLINK 1
// | #define HAVE_REALPATH 1
// | #define HAVE_SELECT 1
// | #define HAVE_SETEGID 1
// | #define HAVE_SETEUID 1
// | #define HAVE_SETGID 1
// | #define HAVE_SETLOCALE 1
// | #define HAVE_SETREGID 1
// | #define HAVE_SETREUID 1
// | #define HAVE_SETSID 1
// | #define HAVE_SETPGID 1
// | #define HAVE_SETPGRP 1
// | #define HAVE_SETUID 1
// | #define HAVE_SETVBUF 1
// | #define HAVE_SNPRINTF 1
// | #define HAVE_SIGACTION 1
// | #define HAVE_STRFTIME 1
// | #define HAVE_SYSCONF 1
// | #define HAVE_TCGETPGRP 1
// | #define HAVE_TCSETPGRP 1
// | #define HAVE_TEMPNAM 1
// | #define HAVE_TIMES 1
// | #define HAVE_TMPFILE 1
// | #define HAVE_TMPNAM 1
// | #define HAVE_TRUNCATE 1
// | #define HAVE_UNAME 1
// | #define HAVE_UNSETENV 1
// | #define HAVE_UTIMES 1
// | #define HAVE_WAITPID 1
// | #define HAVE_WAIT3 1
// | #define HAVE_WAIT4 1
// | #define HAVE_WCSCOLL 1
// | #define HAVE_CHROOT 1
// | #define HAVE_LINK 1
// | #define HAVE_SYMLINK 1
// | #define HAVE_FCHDIR 1
// | #define HAVE_FSYNC 1
// | #define HAVE_FDATASYNC 1
// | #define HAVE_FLOCK 1
// | #define HAVE_ZLIB_COPY 1
// | #define HAVE_INET_PTON 1
// | #define HAVE_OPENPTY 1
// | #define HAVE_FORKPTY 1
// | #define HAVE_FSEEKO 1
// | #define HAVE_FSTATVFS 1
// | #define HAVE_FTELLO 1
// | #define HAVE_STATVFS 1
// | #define HAVE_DUP2 1
// | #define HAVE_GETCWD 1
// | #define HAVE_STRDUP 1
// | #define HAVE_STRERROR 1
// | #define HAVE_MEMMOVE 1
// | #define HAVE_GETPGRP 1
// | #define HAVE_SETPGRP 1
// | #define HAVE_GETTIMEOFDAY 1
// | /* end confdefs.h.  */
// | 
// | #include <sys/types.h>
// | #include <netdb.h>
// | #include <string.h>
// | #include <sys/socket.h>
// | #include <netinet/in.h>
// | 
// | main()
// | {
// |   int passive, gaierr, inet4 = 0, inet6 = 0;
// |   struct addrinfo hints, *ai, *aitop;
// |   char straddr[INET6_ADDRSTRLEN], strport[16];
// | 
// |   for (passive = 0; passive <= 1; passive++) {
// |     memset(&hints, 0, sizeof(hints));
// |     hints.ai_family = AF_UNSPEC;
// |     hints.ai_flags = passive ? AI_PASSIVE : 0;
// |     hints.ai_socktype = SOCK_STREAM;
// |     hints.ai_protocol = IPPROTO_TCP;
// |     if ((gaierr = getaddrinfo(NULL, "54321", &hints, &aitop)) != 0) {
// |       (void)gai_strerror(gaierr);
// |       goto bad;
// |     }
// |     for (ai = aitop; ai; ai = ai->ai_next) {
// |       if (ai->ai_addr == NULL ||
// |           ai->ai_addrlen == 0 ||
// |           getnameinfo(ai->ai_addr, ai->ai_addrlen,
// |                       straddr, sizeof(straddr), strport, sizeof(strport),
// |                       NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
// |         goto bad;
// |       }
// |       switch (ai->ai_family) {
// |       case AF_INET:
// |         if (strcmp(strport, "54321") != 0) {
// |           goto bad;
// |         }
// |         if (passive) {
// |           if (strcmp(straddr, "0.0.0.0") != 0) {
// |             goto bad;
// |           }
// |         } else {
// |           if (strcmp(straddr, "127.0.0.1") != 0) {
// |             goto bad;
// |           }
// |         }
// |         inet4++;
// |         break;
// |       case AF_INET6:
// |         if (strcmp(strport, "54321") != 0) {
// |           goto bad;
// |         }
// |         if (passive) {
// |           if (strcmp(straddr, "::") != 0) {
// |             goto bad;
// |           }
// |         } else {
// |           if (strcmp(straddr, "::1") != 0) {
// |             goto bad;
// |           }
// |         }
// |         inet6++;
// |         break;
// |       case AF_UNSPEC:
// |         goto bad;
// |         break;
// |       default:
// |         /* another family support? */
// |         break;
// |       }
// |     }
// |   }
// | 
// |   if (!(inet4 == 0 || inet4 == 2))
// |     goto bad;
// |   if (!(inet6 == 0 || inet6 == 2))
// |     goto bad;
// | 
// |   if (aitop)
// |     freeaddrinfo(aitop);
// |   exit(0);
// | 
// |  bad:
// |   if (aitop)
// |     freeaddrinfo(aitop);
// |   exit(1);
// | }
// | 
// configure:17150: result: buggy

// $ gcc -o conftest -O2  conftest.c -lsocket
// conftest.c: In function `main':
// conftest.c:304: error: storage size of `hints' isn't known
// conftest.c:310: error: `AI_PASSIVE' undeclared (first use in this function)
// conftest.c:310: error: (Each undeclared identifier is reported only once
// conftest.c:310: error: for each function it appears in.)
// conftest.c:313: warning: passing arg 4 of `getaddrinfo' from incompatible pointer type
// conftest.c:317: error: dereferencing pointer to incomplete type
// conftest.c:318: error: dereferencing pointer to incomplete type
// conftest.c:319: error: dereferencing pointer to incomplete type
// conftest.c:320: error: dereferencing pointer to incomplete type
// conftest.c:320: error: dereferencing pointer to incomplete type
// conftest.c:322: error: `NI_NUMERICHOST' undeclared (first use in this function)
// conftest.c:322: error: `NI_NUMERICSERV' undeclared (first use in this function)
// conftest.c:325: error: dereferencing pointer to incomplete type
// conftest.c:372: warning: passing arg 1 of `freeaddrinfo' from incompatible pointer type
// conftest.c:377: warning: passing arg 1 of `freeaddrinfo' from incompatible pointer type

// gcc -o conftest -O2  conftest.c -lsocket
#define _XOPEN_SOURCE 600
#define _XOPEN_SOURCE_EXTENDED 1
#define _POSIX_C_SOURCE 200112L

#include <sys/types.h>
#include <netdb.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>

main()
{
  int passive, gaierr, inet4 = 0, inet6 = 0;
  struct addrinfo hints, *ai, *aitop;
  char straddr[INET6_ADDRSTRLEN], strport[16];

  for (passive = 0; passive <= 1; passive++) {
    memset(&hints, 0, sizeof(hints));
    hints.ai_family = AF_UNSPEC;
    hints.ai_flags = passive ? AI_PASSIVE : 0;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    if ((gaierr = getaddrinfo(NULL, "54321", &hints, &aitop)) != 0) {
      (void)gai_strerror(gaierr);
      goto bad;
    }
    for (ai = aitop; ai; ai = ai->ai_next) {
      if (ai->ai_addr == NULL ||
          ai->ai_addrlen == 0 ||
          getnameinfo(ai->ai_addr, ai->ai_addrlen,
                      straddr, sizeof(straddr), strport, sizeof(strport),
                      NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
        goto bad;
      }
      switch (ai->ai_family) {
      case AF_INET:
        if (strcmp(strport, "54321") != 0) {
          goto bad;
        }
        if (passive) {
          if (strcmp(straddr, "0.0.0.0") != 0) {
            goto bad;
          }
        } else {
          if (strcmp(straddr, "127.0.0.1") != 0) {
            goto bad;
          }
        }
        inet4++;
        break;
      case AF_INET6:
        if (strcmp(strport, "54321") != 0) {
          goto bad;
        }
        if (passive) {
          if (strcmp(straddr, "::") != 0) {
            goto bad;
          }
        } else {
          if (strcmp(straddr, "::1") != 0) {
            goto bad;
          }
        }
        inet6++;
        break;
      case AF_UNSPEC:
        goto bad;
        break;
      default:
        /* another family support? */
        break;
      }
    }
  }

  if (!(inet4 == 0 || inet4 == 2))
    goto bad;
  if (!(inet6 == 0 || inet6 == 2))
    goto bad;

  if (aitop)
    freeaddrinfo(aitop);
  exit(0);

 bad:
  if (aitop)
    freeaddrinfo(aitop);
  exit(1);
}