userapps/opensource/ipsec-tools/acracoon.m4

   1 dnl RACOON_PATH_LIBS(FUNCTION, LIB, SEARCH-PATHS [, ACTION-IF-FOUND
   2 dnl            [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
   3 dnl Search for a library defining FUNC, if it's not already available.
   4
   5 AC_DEFUN([RACOON_PATH_LIBS],
   6 [AC_PREREQ([2.13])
   7 AC_CACHE_CHECK([for $2 containing $1], [ac_cv_search_$1],
   8 [ac_func_search_save_LIBS="$LIBS"
   9 ac_cv_search_$1="no"
  10 AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="none required"],
  11         [LIBS="-l$2 $LIBS"
  12         AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="-l$2"], [])])
  13 LIBS="$ac_func_search_save_LIBS"
  14 ifelse("x$3", "x", , [ test "$ac_cv_search_$1" = "no" && for i in $3; do
  15   LIBS="-L$i -l$2 $ac_func_search_save_LIBS"
  16   AC_TRY_LINK_FUNC([$1],
  17   [ac_cv_search_$1="-L$i -l$2"
  18   break])
  19   done
  20 LIBS="$ac_func_search_save_LIBS" ]) ])
  21 if test "$ac_cv_search_$1" != "no"; then
  22   test "$ac_cv_search_$1" = "none required" || LIBS="$ac_cv_search_$1 $LIBS"
  23   $4
  24 else :
  25   $5
  26 fi])
  27
  28 dnl  Check if either va_copy() or __va_copy() is available. On linux systems
  29 dnl  at least one of these should be present.
  30 AC_DEFUN([RACOON_CHECK_VA_COPY], [
  31         saved_CFLAGS=$CFLAGS
  32         CFLAGS="-Wall -O2"
  33         AC_CACHE_CHECK([for an implementation of va_copy()],
  34                 ac_cv_va_copy,[
  35                 AC_TRY_RUN([#include <stdarg.h>
  36                 void func (int i, ...) {
  37                         va_list args1, args2;
  38                         va_start (args1, i);
  39                         va_copy (args2, args1);
  40                         if (va_arg (args1, int) != 1 || va_arg (args2, int) != 1)
  41                                 exit (1);
  42                         va_end (args1);
  43                         va_end (args2);
  44                 }
  45                 int main() {
  46                         func (0, 1);
  47                         return 0;
  48                 }],
  49                 [ac_cv_va_copy=yes],
  50                 [ac_cv_va_copy=no],
  51                 [])
  52         ])
  53         if test x$ac_cv_va_copy != xyes; then
  54                 AC_CACHE_CHECK([for an implementation of __va_copy()],
  55                         ac_cv___va_copy,[
  56                         AC_TRY_RUN([#include <stdarg.h>
  57                         void func (int i, ...) {
  58                                 va_list args1, args2;
  59                                 va_start (args1, i);
  60                                 __va_copy (args2, args1);
  61                                 if (va_arg (args1, int) != 1 || va_arg (args2, int) != 1)
  62                                         exit (1);
  63                                 va_end (args1);
  64                                 va_end (args2);
  65                         }
  66                         int main() {
  67                                 func (0, 1);
  68                                 return 0;
  69                         }],
  70                         [ac_cv___va_copy=yes],
  71                         [ac_cv___va_copy=no],
  72                         [])
  73                 ])
  74         fi
  75
  76         if test "x$ac_cv_va_copy" = "xyes"; then
  77                 va_copy_func=va_copy
  78         elif test "x$ac_cv___va_copy" = "xyes"; then
  79                 va_copy_func=__va_copy
  80         fi
  81
  82         if test -n "$va_copy_func"; then
  83                 AC_DEFINE_UNQUOTED(VA_COPY,$va_copy_func,
  84                         [A 'va_copy' style function])
  85         else
  86                 AC_MSG_WARN([Hmm, neither va_copy() nor __va_copy() found.])
  87                 AC_MSG_WARN([Using a generic fallback.])
  88         fi
  89         CFLAGS=$saved_CFLAGS
  90         unset saved_CFLAGS
  91 ])
  92
  93 AC_DEFUN([RACOON_CHECK_BUGGY_GETADDRINFO], [
  94         AC_MSG_CHECKING(getaddrinfo bug)
  95         saved_CFLAGS=$CFLAGS
  96         CFLAGS="-Wall -O2"
  97         AC_TRY_RUN([
  98         #include <sys/types.h>
  99         #include <sys/socket.h>
 100         #include <netdb.h>
 101         #include <stdlib.h>
 102         #include <string.h>
 103         #include <netinet/in.h>
 104
 105         int main()
 106         {
 107           int passive, gaierr, inet4 = 0, inet6 = 0;
 108           struct addrinfo hints, *ai, *aitop;
 109           char straddr[INET6_ADDRSTRLEN], strport[16];
 110
 111           for (passive = 0; passive <= 1; passive++) {
 112             memset(&hints, 0, sizeof(hints));
 113             hints.ai_family = AF_UNSPEC;
 114             hints.ai_flags = passive ? AI_PASSIVE : 0;
 115             hints.ai_protocol = IPPROTO_TCP;
 116             hints.ai_socktype = SOCK_STREAM;
 117             if ((gaierr = getaddrinfo(NULL, "54321", &hints, &aitop)) != 0) {
 118               (void)gai_strerror(gaierr);
 119               goto bad;
 120             }
 121             for (ai = aitop; ai; ai = ai->ai_next) {
 122               if (ai->ai_addr == NULL ||
 123                   ai->ai_addrlen == 0 ||
 124                   getnameinfo(ai->ai_addr, ai->ai_addrlen,
 125                               straddr, sizeof(straddr), strport, sizeof(strport),
 126                               NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
 127                 goto bad;
 128               }
 129               switch (ai->ai_family) {
 130               case AF_INET:
 131                 if (strcmp(strport, "54321") != 0) {
 132                   goto bad;
 133                 }
 134                 if (passive) {
 135                   if (strcmp(straddr, "0.0.0.0") != 0) {
 136                     goto bad;
 137                   }
 138                 } else {
 139                   if (strcmp(straddr, "127.0.0.1") != 0) {
 140                     goto bad;
 141                   }
 142                 }
 143                 inet4++;
 144                 break;
 145               case AF_INET6:
 146                 if (strcmp(strport, "54321") != 0) {
 147                   goto bad;
 148                 }
 149                 if (passive) {
 150                   if (strcmp(straddr, "::") != 0) {
 151                     goto bad;
 152                   }
 153                 } else {
 154                   if (strcmp(straddr, "::1") != 0) {
 155                     goto bad;
 156                   }
 157                 }
 158                 inet6++;
 159                 break;
 160               case AF_UNSPEC:
 161                 goto bad;
 162                 break;
 163               default:
 164                 /* another family support? */
 165                 break;
 166               }
 167             }
 168           }
 169
 170           if (!(inet4 == 0 || inet4 == 2))
 171             goto bad;
 172           if (!(inet6 == 0 || inet6 == 2))
 173             goto bad;
 174
 175           if (aitop)
 176             freeaddrinfo(aitop);
 177           exit(0);
 178
 179          bad:
 180           if (aitop)
 181             freeaddrinfo(aitop);
 182           exit(1);
 183         }
 184         ],
 185         AC_MSG_RESULT(good)
 186         buggygetaddrinfo=no,
 187         AC_MSG_RESULT(buggy)
 188         buggygetaddrinfo=yes,
 189         AC_MSG_RESULT(buggy)
 190         buggygetaddrinfo=yes)
 191         CFLAGS=$saved_CFLAGS
 192         unset saved_CFLAGS
 193 ])