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authorTomas Abrahamsson <[email protected]>2012-05-29 21:46:32 +0200
committerTomas Abrahamsson <[email protected]>2012-08-16 01:48:04 +0200
commit2e3852b6942d4bf4eab909b501b7085d5ccd0e68 (patch)
tree9a8b240fe2da18460b3b8b4af0147b3c76bc20ae /erts
parent9d3bb79a1bec07706de46a67a001269dbbada293 (diff)
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Add checks for in6addr_any and in6addr_loopback
These variables are normally declared by <netinet/in.h>, but for instance not on Windows 7, SDK 7.1. Work around that by using IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT if present, fallback to using :: and ::1.
Diffstat (limited to 'erts')
-rw-r--r--erts/configure.in58
-rw-r--r--erts/emulator/drivers/common/inet_drv.c21
2 files changed, 79 insertions, 0 deletions
diff --git a/erts/configure.in b/erts/configure.in
index cb1b00b8b1..e9736ab6fe 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1949,6 +1949,64 @@ AC_CHECK_FUNCS([openpty])
AC_CHECK_HEADERS(net/if_dl.h ifaddrs.h netpacket/packet.h)
AC_CHECK_FUNCS([getifaddrs])
+dnl Checks for variables in6addr_any and in6addr_loopback,
+dnl
+dnl They normally declared by netinet/in.h, according to POSIX,
+dnl but not on Windows 7 (Windows SDK 7.1). I would have liked
+dnl to just write AC_CHECK_DECL([in6addr_any], ...) but if doing so,
+dnl the configure check fails erroneously on Linux with the error
+dnl "cannot convert to a pointer type", on a line looking like
+dnl "char *p = (char *) in6addr_any;", so work around that
+dnl with some more code.
+AC_CACHE_CHECK(
+ [whether in6addr_any is declared],
+ [erts_cv_have_in6addr_any],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ ]],
+ [[printf("%d", in6addr_any.s6_addr[16]);]]
+ )],
+ [erts_cv_have_in6addr_any=yes],
+ [erts_cv_have_in6addr_any=no]
+ )]
+)
+
+case "$erts_cv_have_in6addr_any" in
+ yes)
+ AC_DEFINE([HAVE_IN6ADDR_ANY], [1],
+ [Define to 1 if you have the variable in6addr_any declared.])
+esac
+
+AC_CACHE_CHECK(
+ [whether in6addr_loopback is declared],
+ [erts_cv_have_in6addr_loopback],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ ]],
+ [[printf("%d", in6addr_loopback.s6_addr[16]);]]
+ )],
+ [erts_cv_have_in6addr_loopback=yes],
+ [erts_cv_have_in6addr_loopback=no]
+ )]
+)
+
+case "$erts_cv_have_in6addr_loopback" in
+ yes)
+ AC_DEFINE([HAVE_IN6ADDR_LOOPBACK], [1],
+ [Define to 1 if you have the variable in6addr_loopback declared.])
+esac
+
+AC_CHECK_DECLS([IN6ADDR_ANY_INIT, IN6ADDR_LOOPBACK_INIT], [], [],
+ [#include <netinet/in.h>])
+
dnl ----------------------------------------------------------------------
dnl Checks for features/quirks in the system that affects Erlang.
dnl ----------------------------------------------------------------------
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 9f84329dd8..7f3b3323f5 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -1228,6 +1228,27 @@ struct erl_drv_entry inet_driver_entry =
NULL,
};
+#if HAVE_IN6
+# if ! defined(HAVE_IN6ADDR_ANY) || ! HAVE_IN6ADDR_ANY
+# if HAVE_DECL_IN6ADDR_ANY_INIT
+static const struct in6_addr in6addr_any = { { IN6ADDR_ANY_INIT } };
+# else
+static const struct in6_addr in6addr_any =
+ { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } };
+# endif /* HAVE_IN6ADDR_ANY_INIT */
+# endif /* ! HAVE_DECL_IN6ADDR_ANY */
+
+# if ! defined(HAVE_IN6ADDR_LOOPBACK) || ! HAVE_IN6ADDR_LOOPBACK
+# if HAVE_DECL_IN6ADDR_LOOPBACK_INIT
+static const struct in6_addr in6addr_loopback =
+ { { IN6ADDR_LOOPBACK_INIT } };
+# else
+static const struct in6_addr in6addr_loopback =
+ { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } };
+# endif /* HAVE_IN6ADDR_LOOPBACk_INIT */
+# endif /* ! HAVE_DECL_IN6ADDR_LOOPBACK */
+#endif /* HAVE_IN6 */
+
/* XXX: is this a driver interface function ??? */
void erl_exit(int n, char*, ...);