Merge branch 'raimo/inet-getifaddrs/OTP-8926' into dev

* raimo/inet-getifaddrs/OTP-8926:
  Write documentation
  Delete decommented code
  Add testcase
  Implement inet:getifaddrs/0 on Windows
  Implement basic inet:getifaddrs/0
  Fix building error of SCTP in FreeBSD 7.1 and later

8 files changed, 961 insertions, 140 deletions

diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
index 3b1edd7605..0d7914fbb8 100644
--- a/erts/aclocal.m4
+++ b/erts/aclocal.m4
@@ -386,14 +386,24 @@ AC_DEFUN(LM_SYS_IPV6,
 AC_CACHE_VAL(ac_cv_sys_ipv6_support,
 [ok_so_far=yes
  AC_TRY_COMPILE([#include <sys/types.h>
-#include <netinet/in.h>],
+#ifdef __WIN32__
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <netinet/in.h>
+#endif],
    [struct in6_addr a6; struct sockaddr_in6 s6;], ok_so_far=yes, ok_so_far=no)
 
 if test $ok_so_far = yes; then
   ac_cv_sys_ipv6_support=yes
 else
   AC_TRY_COMPILE([#include <sys/types.h>
-#include <netinet/in.h>],
+#ifdef __WIN32__
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <netinet/in.h>
+#endif],
     [struct in_addr6 a6; struct sockaddr_in6 s6;],
     ac_cv_sys_ipv6_support=in_addr6, ac_cv_sys_ipv6_support=no)
 fi
diff --git a/erts/autoconf/win32.config.cache.static b/erts/autoconf/win32.config.cache.static
index 31dfe510cd..cc33fc09b3 100755
--- a/erts/autoconf/win32.config.cache.static
+++ b/erts/autoconf/win32.config.cache.static
@@ -212,7 +212,6 @@ ac_cv_sizeof_void_p=${ac_cv_sizeof_void_p=4}
 ac_cv_struct_exception=${ac_cv_struct_exception=no}
 ac_cv_struct_sockaddr_sa_len=${ac_cv_struct_sockaddr_sa_len=no}
 ac_cv_struct_tm=${ac_cv_struct_tm=time.h}
-ac_cv_sys_ipv6_support=${ac_cv_sys_ipv6_support=no}
 ac_cv_sys_multicast_support=${ac_cv_sys_multicast_support=no}
 ac_cv_type_char=${ac_cv_type_char=yes}
 ac_cv_type_int=${ac_cv_type_int=yes}
diff --git a/erts/configure.in b/erts/configure.in
index 8c6f2ac076..c279161a29 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1788,7 +1788,7 @@ AC_CHECK_FUNCS([fdatasync])
 dnl Find which C libraries are required to use fdatasync
 AC_SEARCH_LIBS(fdatasync, [rt])
 
-AC_CHECK_HEADERS(net/if_dl.h ifaddrs.h)
+AC_CHECK_HEADERS(net/if_dl.h ifaddrs.h netpacket/packet.h)
 AC_CHECK_FUNCS([getifaddrs])
 
 dnl ----------------------------------------------------------------------
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 3de48194fb..f07e4793d2 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -54,6 +54,9 @@
 #ifdef HAVE_IFADDRS_H
 #include <ifaddrs.h>
 #endif
+#ifdef HAVE_NETPACKET_PACKET_H
+#include <netpacket/packet.h>
+#endif
 
 /* All platforms fail on malloc errors. */
 #define FATAL_MALLOC
@@ -85,6 +88,7 @@
 #include <winsock2.h>
 #endif
 #include <windows.h>
+#include <iphlpapi.h>
 
 #include <Ws2tcpip.h>   /* NEED VC 6.0 !!! */
 
@@ -467,6 +471,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
 #define INET_REQ_IFGET         22
 #define INET_REQ_IFSET         23
 #define INET_REQ_SUBSCRIBE     24
+#define INET_REQ_GETIFADDRS    25
 /* TCP requests */
 #define TCP_REQ_ACCEPT         40
 #define TCP_REQ_LISTEN         41
@@ -3824,39 +3829,81 @@ do { if ((end)-(ptr) < (n)) goto error; } while(0)
 static char* sockaddr_to_buf(struct sockaddr* addr, char* ptr, char* end)
 {
     if (addr->sa_family == AF_INET || addr->sa_family == 0) {
-	struct in_addr a;
-	buf_check(ptr,end,sizeof(struct in_addr));
-	a = ((struct sockaddr_in*) addr)->sin_addr;
-	sys_memcpy(ptr, (char*)&a, sizeof(struct in_addr));
-	return ptr + sizeof(struct in_addr);
+	struct in_addr *p = &(((struct sockaddr_in*) addr)->sin_addr);
+	buf_check(ptr, end, 1 + sizeof(struct in_addr));
+	*ptr = INET_AF_INET;
+	sys_memcpy(ptr+1, (char*)p, sizeof(struct in_addr));
+	return ptr + 1 + sizeof(struct in_addr);
     }
 #if defined(HAVE_IN6) && defined(AF_INET6)
     else if (addr->sa_family == AF_INET6) {
-	struct in6_addr a;
-	buf_check(ptr,end,sizeof(struct in6_addr));
-	a = ((struct sockaddr_in6*) addr)->sin6_addr;
-	sys_memcpy(ptr, (char*)&a, sizeof(struct in6_addr));
-	return ptr + sizeof(struct in6_addr);
+	struct in6_addr *p = &(((struct sockaddr_in6*) addr)->sin6_addr);
+	buf_check(ptr, end, 1 + sizeof(struct in6_addr));
+	*ptr = INET_AF_INET6;
+	sys_memcpy(ptr+1, (char*)p, sizeof(struct in6_addr));
+	return ptr + 1 + sizeof(struct in6_addr);
+    }
+#endif
+#if defined(AF_LINK)
+    else if (addr->sa_family == AF_LINK) {
+	struct sockaddr_dl *sdl_p = (struct sockaddr_dl*) addr;
+	buf_check(ptr, end, 2 + sdl_p->sdl_alen);
+	put_int16(sdl_p->sdl_alen, ptr); ptr += 2;
+	sys_memcpy(ptr, sdl_p->sdl_data + sdl_p->sdl_nlen, sdl_p->sdl_alen);
+	return ptr + sdl_p->sdl_alen;
+    }
+#endif
+#if defined(AF_PACKET) && defined(HAVE_NETPACKET_PACKET_H)
+    else if(addr->sa_family == AF_PACKET) {
+	struct sockaddr_ll *sll_p = (struct sockaddr_ll*) addr;
+	buf_check(ptr, end, 2 + sll_p->sll_halen);
+	put_int16(sll_p->sll_halen, ptr); ptr += 2;
+	sys_memcpy(ptr, sll_p->sll_addr, sll_p->sll_halen);
+	return ptr + sll_p->sll_halen;
     }
 #endif
+    return ptr;
  error:
     return NULL;
-
 }
 
 static char* buf_to_sockaddr(char* ptr, char* end, struct sockaddr* addr)
 {
-    buf_check(ptr,end,sizeof(struct in_addr));
-    sys_memcpy((char*) &((struct sockaddr_in*)addr)->sin_addr, ptr,
-	       sizeof(struct in_addr));
-    addr->sa_family = AF_INET;
-    return ptr +  sizeof(struct in_addr);
-
+    buf_check(ptr,end,1);
+    switch (*ptr++) {
+    case INET_AF_INET: {
+	struct in_addr *p = &((struct sockaddr_in*)addr)->sin_addr;
+	buf_check(ptr,end,sizeof(struct in_addr));
+	sys_memcpy((char*) p, ptr, sizeof(struct in_addr));
+	addr->sa_family = AF_INET;
+	return ptr + sizeof(struct in_addr);
+    }
+    case INET_AF_INET6: {
+	struct in6_addr *p = &((struct sockaddr_in6*)addr)->sin6_addr;
+	buf_check(ptr,end,sizeof(struct in6_addr));
+	sys_memcpy((char*) p, ptr, sizeof(struct in6_addr));
+	addr->sa_family = AF_INET6;
+	return ptr + sizeof(struct in6_addr);
+    }
+    }
  error:
     return NULL;
 }
 
 
+#if defined (IFF_POINTOPOINT)
+#define IFGET_FLAGS(cflags) IFGET_FLAGS_P2P(cflags, IFF_POINTOPOINT)
+#elif defined IFF_POINTTOPOINT
+#define IFGET_FLAGS(cflags) IFGET_FLAGS_P2P(cflags, IFF_POINTTOPOINT)
+#endif
+
+#define IFGET_FLAGS_P2P(cflags, iff_ptp)				\
+    ((((cflags) & IFF_UP) ? INET_IFF_UP : 0) |				\
+     (((cflags) & IFF_BROADCAST) ? INET_IFF_BROADCAST : 0) |		\
+     (((cflags) & IFF_LOOPBACK) ? INET_IFF_LOOPBACK : 0) |		\
+     (((cflags) & iff_ptp) ? INET_IFF_POINTTOPOINT : 0) |		\
+     (((cflags) & IFF_UP) ? INET_IFF_RUNNING : 0) |  /* emulate running ? */ \
+     (((cflags) & IFF_MULTICAST) ? INET_IFF_MULTICAST : 0))
 
 #if defined(__WIN32__) && defined(SIO_GET_INTERFACE_LIST)
 
@@ -3894,7 +3941,6 @@ static int inet_ctl_getiflist(inet_descriptor* desc, char** rbuf, int rsize)
     return ctl_reply(INET_REP_OK, sbuf, sptr - sbuf, rbuf, rsize);
 }
 
-
 /* input is an ip-address in string format i.e A.B.C.D 
 ** scan the INTERFACE_LIST to get the options 
 */
@@ -3980,27 +4026,12 @@ static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
 	    break;
 
 	case INET_IFOPT_FLAGS: {
-	    long eflags = 0;
 	    int flags = ifp->iiFlags;
 	    /* just enumerate the interfaces (no names) */
 
-	    /* translate flags */
-	    if (flags & IFF_UP)
-		eflags |= INET_IFF_UP;
-	    if (flags & IFF_BROADCAST)
-		eflags |= INET_IFF_BROADCAST;
-	    if (flags & IFF_LOOPBACK)
-		eflags |= INET_IFF_LOOPBACK;
-	    if (flags & IFF_POINTTOPOINT)
-		eflags |= INET_IFF_POINTTOPOINT;
-	    if (flags & IFF_UP) /* emulate runnign ? */
-		eflags |= INET_IFF_RUNNING;
-	    if (flags & IFF_MULTICAST)
-		eflags |= INET_IFF_MULTICAST;
-
 	    buf_check(sptr, s_end, 5);
 	    *sptr++ = INET_IFOPT_FLAGS;
-	    put_int32(eflags, sptr);
+	    put_int32(IFGET_FLAGS(flags), sptr);
 	    sptr += 4;
 	    break;
 	}
@@ -4021,7 +4052,6 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
     return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize);
 }
 
-
 #elif defined(SIOCGIFCONF) && defined(SIOCSIFFLAGS)
 /* cygwin has SIOCGIFCONF but not SIOCSIFFLAGS (Nov 2002) */
 
@@ -4032,69 +4062,77 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
 #define SIZEA(p) (sizeof (p))
 #endif
 
-
-static int inet_ctl_getiflist(inet_descriptor* desc, char** rbuf, int rsize)
-{
-    struct ifconf ifc;
-    struct ifreq *ifr;
-    char *buf;
-    int buflen, ifc_len, i;
-    char *sbuf, *sp;
-    
-    /* Courtesy of Per Bergqvist and W. Richard Stevens */
-    
-    ifc_len = 0;
-    buflen = 100 * sizeof(struct ifreq);
-    buf = ALLOC(buflen);
+static int get_ifconf(SOCKET s, struct ifconf *ifcp) {
+    int ifc_len = 0;
+    int buflen = 100 * sizeof(struct ifreq);
+    char *buf = ALLOC(buflen);
 
     for (;;) {
-	ifc.ifc_len = buflen;
-	ifc.ifc_buf = buf;
-	if (ioctl(desc->s, SIOCGIFCONF, (char *)&ifc) < 0) {
+	ifcp->ifc_len = buflen;
+	ifcp->ifc_buf = buf;
+	if (ioctl(s, SIOCGIFCONF, (char *)ifcp) < 0) {
 	    int res = sock_errno();
 	    if (res != EINVAL || ifc_len) {
 		FREE(buf);
-		return ctl_error(res, rbuf, rsize);
+		return -1;
 	    }
 	} else {
-	    if (ifc.ifc_len == ifc_len) break; /* buf large enough */
-	    ifc_len = ifc.ifc_len;
+	    if (ifcp->ifc_len == ifc_len) break; /* buf large enough */
+	    ifc_len = ifcp->ifc_len;
 	}
 	buflen += 10 * sizeof(struct ifreq);
 	buf = (char *)REALLOC(buf, buflen);
     }
-    
-    sp = sbuf = ALLOC(ifc_len+1);
+    return 0;
+}
+
+static void free_ifconf(struct ifconf *ifcp) {
+    FREE(ifcp->ifc_buf);
+}
+
+static int inet_ctl_getiflist(inet_descriptor* desc, char** rbuf, int rsize)
+{
+    struct ifconf ifc;
+    struct ifreq *ifrp;
+    char *sbuf, *sp;
+    int i;
+
+    /* Courtesy of Per Bergqvist and W. Richard Stevens */
+
+    if (get_ifconf(desc->s, &ifc) < 0) {
+	return ctl_error(sock_errno(), rbuf, rsize);
+    }
+
+    sp = sbuf = ALLOC(ifc.ifc_len+1);
     *sp++ = INET_REP_OK;
     i = 0;
     for (;;) {
 	int n;
-	
-	ifr = (struct ifreq *) VOIDP(buf + i);
-	n = sizeof(ifr->ifr_name) + SIZEA(ifr->ifr_addr);
-	if (n < sizeof(*ifr)) n = sizeof(*ifr);
-	if (i+n > ifc_len) break;
+
+	ifrp = (struct ifreq *) VOIDP(ifc.ifc_buf + i);
+	n = sizeof(ifrp->ifr_name) + SIZEA(ifrp->ifr_addr);
+	if (n < sizeof(*ifrp)) n = sizeof(*ifrp);
+	if (i+n > ifc.ifc_len) break;
 	i += n;
-	
-	switch (ifr->ifr_addr.sa_family) {
+
+	switch (ifrp->ifr_addr.sa_family) {
 #if defined(HAVE_IN6) && defined(AF_INET6)
 	case AF_INET6:
 #endif
 	case AF_INET:
-	    ASSERT(sp+IFNAMSIZ+1 < sbuf+buflen+1)
-	    strncpy(sp, ifr->ifr_name, IFNAMSIZ);
+	    ASSERT(sp+IFNAMSIZ+1 < sbuf+ifc.ifc_len+1)
+	    strncpy(sp, ifrp->ifr_name, IFNAMSIZ);
 	    sp[IFNAMSIZ] = '\0';
 	    sp += strlen(sp), ++sp;
 	}
-	
-	if (i >= ifc_len) break;
+
+	if (i >= ifc.ifc_len) break;
     }
-    FREE(buf);
+    free_ifconf(&ifc);
     *rbuf = sbuf;
     return sp - sbuf;
 }
 
-
 /* FIXME: temporary hack */
 #ifndef IFHWADDRLEN
 #define IFHWADDRLEN 6
@@ -4133,37 +4171,52 @@ static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
 #ifdef SIOCGIFHWADDR
 	    if (ioctl(desc->s, SIOCGIFHWADDR, (char *)&ifreq) < 0)
 		break;
-	    buf_check(sptr, s_end, 1+IFHWADDRLEN);
+	    buf_check(sptr, s_end, 1+2+IFHWADDRLEN);
 	    *sptr++ = INET_IFOPT_HWADDR;
+	    put_int16(IFHWADDRLEN, sptr); sptr += 2;
 	    /* raw memcpy (fix include autoconf later) */
 	    sys_memcpy(sptr, (char*)(&ifreq.ifr_hwaddr.sa_data), IFHWADDRLEN);
 	    sptr += IFHWADDRLEN;
-#elif defined(HAVE_GETIFADDRS)
-        struct ifaddrs *ifa, *ifp;
-        int found = 0;
-
-        if (getifaddrs(&ifa) == -1)
-        goto error;
+#elif defined(SIOCGENADDR)
+	    if (ioctl(desc->s, SIOCGENADDR, (char *)&ifreq) < 0)
+		break;
+	    buf_check(sptr, s_end, 1+2+sizeof(ifreq.ifr_enaddr));
+	    *sptr++ = INET_IFOPT_HWADDR;
+	    put_int16(sizeof(ifreq.ifr_enaddr), sptr); sptr += 2;
+	    /* raw memcpy (fix include autoconf later) */
+	    sys_memcpy(sptr, (char*)(&ifreq.ifr_enaddr),
+		       sizeof(ifreq.ifr_enaddr));
+	    sptr += sizeof(ifreq.ifr_enaddr);
+#elif defined(HAVE_GETIFADDRS) && defined(AF_LINK)
+	    struct ifaddrs *ifa, *ifp;
+	    struct sockaddr_dl *sdlp;
+	    int found = 0;
+
+	    if (getifaddrs(&ifa) == -1)
+		goto error;
 
-        for (ifp = ifa; ifp; ifp = ifp->ifa_next) {
-        if ((ifp->ifa_addr->sa_family == AF_LINK) &&
-        (sys_strcmp(ifp->ifa_name, ifreq.ifr_name) == 0)) {
-            found = 1;
-            break;
-        }
-        }
+	    for (ifp = ifa; ifp; ifp = ifp->ifa_next) {
+		if ((ifp->ifa_addr->sa_family == AF_LINK) &&
+		    (sys_strcmp(ifp->ifa_name, ifreq.ifr_name) == 0)) {
+		    found = 1;
+		    break;
+		}
+	    }
 
-        if (found == 0) {
-            freeifaddrs(ifa);
-            break;
-        }
+	    if (found == 0) {
+		freeifaddrs(ifa);
+		break;
+	    }
+	    sdlp = (struct sockaddr_dl *)ifp->ifa_addr;
 
-        buf_check(sptr, s_end, 1+IFHWADDRLEN);
-        *sptr++ = INET_IFOPT_HWADDR;
-        sys_memcpy(sptr, ((struct sockaddr_dl *)ifp->ifa_addr)->sdl_data +
-            ((struct sockaddr_dl *)ifp->ifa_addr)->sdl_nlen, IFHWADDRLEN);
-        freeifaddrs(ifa);
-        sptr += IFHWADDRLEN;
+	    buf_check(sptr, s_end, 1+2+sdlp->sdl_alen);
+	    *sptr++ = INET_IFOPT_HWADDR;
+	    put_int16(sdlp->sdl_alen, sptr); sptr += 2;
+	    sys_memcpy(sptr,
+		       sdlp->sdl_data + sdlp->sdl_nlen,
+		       sdlp->sdl_alen);
+	    freeifaddrs(ifa);
+	    sptr += sdlp->sdl_alen;
 #endif
 	    break;
 	}
@@ -4240,29 +4293,15 @@ static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
 
 	case INET_IFOPT_FLAGS: {
 	    int flags;
-	    int eflags = 0;
 
 	    if (ioctl(desc->s, SIOCGIFFLAGS, (char*)&ifreq) < 0)
 		flags = 0;
 	    else
 		flags = ifreq.ifr_flags;
-	    /* translate flags */
-	    if (flags & IFF_UP)
-		eflags |= INET_IFF_UP;
-	    if (flags & IFF_BROADCAST)
-		eflags |= INET_IFF_BROADCAST;
-	    if (flags & IFF_LOOPBACK)
-		eflags |= INET_IFF_LOOPBACK;	
-	    if (flags & IFF_POINTOPOINT)
-		eflags |= INET_IFF_POINTTOPOINT;
-	    if (flags & IFF_RUNNING)
-		eflags |= INET_IFF_RUNNING;
-	    if (flags & IFF_MULTICAST)
-		eflags |= INET_IFF_MULTICAST;
 
 	    buf_check(sptr, s_end, 5);
 	    *sptr++ = INET_IFOPT_FLAGS;
-	    put_int32(eflags, sptr);
+	    put_int32(IFGET_FLAGS(flags), sptr);
 	    sptr += 4;
 	    break;
 	}
@@ -4300,17 +4339,22 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
 	    (void) ioctl(desc->s, SIOCSIFADDR, (char*)&ifreq);
 	    break;
 
-	case INET_IFOPT_HWADDR: 
-	    buf_check(buf, b_end, IFHWADDRLEN);
+	case INET_IFOPT_HWADDR: {
+	    unsigned int len;
+	    buf_check(buf, b_end, 2);
+	    len = get_int16(buf); buf += 2;
+	    buf_check(buf, b_end, len);
 #ifdef SIOCSIFHWADDR
 	    /* raw memcpy (fix include autoconf later) */
-	    sys_memcpy((char*)(&ifreq.ifr_hwaddr.sa_data), buf, IFHWADDRLEN);
+	    sys_memset((char*)(&ifreq.ifr_hwaddr.sa_data),
+		       '\0', sizeof(ifreq.ifr_hwaddr.sa_data));
+	    sys_memcpy((char*)(&ifreq.ifr_hwaddr.sa_data), buf, len);
 
 	    (void) ioctl(desc->s, SIOCSIFHWADDR, (char *)&ifreq);
 #endif
-	    buf += IFHWADDRLEN;
+	    buf += len;
 	    break;
-
+	}
 
 	case INET_IFOPT_BROADADDR:
 #ifdef SIOCSIFBRDADDR
@@ -4415,6 +4459,551 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
 
 #endif
 
+
+
+/* Latin-1 to utf8 */
+
+static int utf8_len(const char *c, int m) {
+    int l;
+    for (l = 0;  m;  c++, l++, m--) {
+	if (*c == '\0') break;
+	if ((*c & 0x7f) != *c) l++;
+    }
+    return l;
+}
+
+static void utf8_encode(const char *c, int m, char *p) {
+    for (;  m;  c++, m--) {
+	if (*c == '\0') break;
+	if ((*c & 0x7f) != *c) {
+	    *p++ = (char) (0xC0 | (0x03 & (*c >> 6)));
+	    *p++ = (char) (0x80 | (0x3F & *c));
+	} else {
+	    *p++ = (char) *c;
+	}
+    }
+}
+
+#if defined(__WIN32__)
+
+static void set_netmask_bytes(char *c, int len, int pref_len) {
+    int i, m;
+    for (i = 0, m = pref_len >> 3;  i < m && i < len;  i++) c[i] = '\xFF';
+    if (i < len) c[i++] = 0xFF << (8 - (pref_len & 7));
+    for (;  i < len;  i++) c[i] = '\0';
+}
+
+
+int eq_masked_bytes(char *a, char *b, int pref_len) {
+    int i, m;
+    for (i = 0, m = pref_len >> 3;  i < m;  i++) {
+	if (a[i] != b[i]) return 0;
+    }
+    m = pref_len & 7;
+    if (m) {
+	m = 0xFF & (0xFF << (8 - m));
+	if ((a[i] & m) != (b[i] & m)) return 0;
+    }
+    return !0;
+}
+
+static int inet_ctl_getifaddrs(inet_descriptor* desc_p,
+			       char **rbuf_pp, int rsize)
+{
+    int i;
+    DWORD ret, n;
+    IP_INTERFACE_INFO *info_p;
+    MIB_IPADDRTABLE *ip_addrs_p;
+    IP_ADAPTER_ADDRESSES *ip_adaddrs_p, *ia_p;
+
+    char *buf_p;
+    char *buf_alloc_p;
+    int buf_size =512;
+#   define BUF_ENSURE(Size)						\
+    do {								\
+	int NEED_, GOT_ = buf_p - buf_alloc_p;				\
+	NEED_ = GOT_ + (Size);						\
+	if (NEED_ > buf_size) {						\
+	    buf_size = NEED_ + 512;					\
+	    buf_alloc_p = REALLOC(buf_alloc_p, buf_size);		\
+	    buf_p = buf_alloc_p + GOT_;					\
+	}								\
+    } while(0)
+#   define SOCKADDR_TO_BUF(opt, sa)					\
+    do {								\
+	if (sa) {							\
+	    char *P_;							\
+	    *buf_p++ = (opt);						\
+	    while (! (P_ = sockaddr_to_buf((sa), buf_p,			\
+					   buf_alloc_p+buf_size))) {    \
+		int GOT_ = buf_p - buf_alloc_p;				\
+		buf_size += 512;					\
+		buf_alloc_p = REALLOC(buf_alloc_p, buf_size);		\
+		buf_p = buf_alloc_p + GOT_;				\
+	    }								\
+	    if (P_ == buf_p) {						\
+		buf_p--;						\
+	    } else {							\
+		buf_p = P_;						\
+	    }								\
+	}								\
+    } while (0)
+
+    {
+	/* Try GetAdaptersAddresses, if it is available */
+	unsigned long ip_adaddrs_size = 16 * 1024;
+	ULONG family = AF_UNSPEC;
+	ULONG flags =
+	    GAA_FLAG_INCLUDE_PREFIX | GAA_FLAG_SKIP_ANYCAST |
+	    GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME |
+	    GAA_FLAG_SKIP_MULTICAST;
+	ULONG (WINAPI *fpGetAdaptersAddresses)
+	    (ULONG, ULONG, PVOID, PIP_ADAPTER_ADDRESSES, PULONG);
+	HMODULE iphlpapi = GetModuleHandle("iphlpapi");
+	fpGetAdaptersAddresses = (void *)
+	    (iphlpapi ?
+		GetProcAddress(iphlpapi, "GetAdaptersAddresses") :
+		NULL);
+	if (fpGetAdaptersAddresses) {
+	    ip_adaddrs_p = ALLOC(ip_adaddrs_size);
+	    for (i = 17;  i;  i--) {
+		ret = fpGetAdaptersAddresses(
+		    family, flags, NULL, ip_adaddrs_p, &ip_adaddrs_size);
+		ip_adaddrs_p = REALLOC(ip_adaddrs_p, ip_adaddrs_size);
+		if (ret == NO_ERROR) break;
+		if (ret == ERROR_BUFFER_OVERFLOW) continue;
+		i = 0;
+	    }
+	    if (! i) {
+		FREE(ip_adaddrs_p);
+		ip_adaddrs_p = NULL;
+	    }
+	} else ip_adaddrs_p = NULL;
+    }
+
+    {
+	/* Load the IP_INTERFACE_INFO table (only IPv4 interfaces),
+	 * reliable source of interface names on XP
+	 */
+	unsigned long info_size = 4 * 1024;
+	info_p = ALLOC(info_size);
+	for (i = 17;  i;  i--) {
+	    ret = GetInterfaceInfo(info_p, &info_size);
+	    info_p = REALLOC(info_p, info_size);
+	    if (ret == NO_ERROR) break;
+	    if (ret == ERROR_INSUFFICIENT_BUFFER) continue;
+	    i = 0;
+	}
+	if (! i) {
+	    FREE(info_p);
+	    info_p = NULL;
+	}
+    }
+
+    if (! ip_adaddrs_p) {
+	/* If GetAdaptersAddresses gave nothing we fall back to
+	 * MIB_IPADDRTABLE (only IPv4 interfaces)
+	 */
+	unsigned long ip_addrs_size = 16 * sizeof(*ip_addrs_p);
+	ip_addrs_p = ALLOC(ip_addrs_size);
+	for (i = 17;  i;  i--) {
+	    ret = GetIpAddrTable(ip_addrs_p, &ip_addrs_size, FALSE);
+	    ip_addrs_p = REALLOC(ip_addrs_p, ip_addrs_size);
+	    if (ret == NO_ERROR) break;
+	    if (ret == ERROR_INSUFFICIENT_BUFFER) continue;
+	    i = 0;
+	}
+	if (! i) {
+	    if (info_p) FREE(info_p);
+	    FREE(ip_addrs_p);
+	    return ctl_reply(INET_REP_OK, NULL, 0, rbuf_pp, rsize);
+	}
+    } else ip_addrs_p = NULL;
+
+    buf_p = buf_alloc_p = ALLOC(buf_size);
+    *buf_p++ = INET_REP_OK;
+
+    /* Iterate over MIB_IPADDRTABLE or IP_ADAPTER_ADDRESSES */
+    for (ia_p = NULL, ip_addrs_p ? ((void *)(i = 0)) : (ia_p = ip_adaddrs_p);
+	 ip_addrs_p ? (i < ip_addrs_p->dwNumEntries) : (ia_p != NULL);
+	 ip_addrs_p ? ((void *)(i++)) : (ia_p = ia_p->Next)) {
+	MIB_IPADDRROW *ipaddrrow_p = NULL;
+	DWORD flags = INET_IFF_MULTICAST;
+	DWORD index = 0;
+	WCHAR *wname_p = NULL;
+	MIB_IFROW ifrow;
+
+	if (ip_addrs_p) {
+	    ipaddrrow_p = ip_addrs_p->table + i;
+	    index = ipaddrrow_p->dwIndex;
+	} else {
+	    index = ia_p->IfIndex;
+	    if (ia_p->Flags & IP_ADAPTER_NO_MULTICAST) {
+		flags &= ~INET_IFF_MULTICAST;
+	    }
+	}
+index:
+	if (! index) goto done;
+	sys_memzero(&ifrow, sizeof(ifrow));
+	ifrow.dwIndex = index;
+	if (GetIfEntry(&ifrow) != NO_ERROR) break;
+	/* Find the interface name - first try MIB_IFROW.wzname */
+	if (ifrow.wszName[0] != 0) {
+	    wname_p = ifrow.wszName;
+	} else {
+	    /* Then try IP_ADAPTER_INDEX_MAP.Name (only IPv4 adapters) */
+	    int j;
+	    for (j = 0;  j < info_p->NumAdapters;  j++) {
+		if (info_p->Adapter[j].Index == (ULONG) ifrow.dwIndex) {
+		    if (info_p->Adapter[j].Name[0] != 0) {
+			wname_p = info_p->Adapter[j].Name;
+		    }
+		    break;
+		}
+	    }
+	}
+	if (wname_p) {
+	    int len;
+	    /* Convert interface name to UTF-8 */
+	    len =
+		WideCharToMultiByte(
+		    CP_UTF8, 0, wname_p, -1, NULL, 0, NULL, NULL);
+	    if (! len) break;
+	    BUF_ENSURE(len);
+	    WideCharToMultiByte(
+		CP_UTF8, 0, wname_p, -1, buf_p, len, NULL, NULL);
+	    buf_p += len;
+	} else {
+	    /* Found no name -
+	    * use "MIB_IFROW.dwIndex: MIB_IFROW.bDescr" as name instead */
+	    int l;
+	    l = utf8_len(ifrow.bDescr, ifrow.dwDescrLen);
+	    BUF_ENSURE(9 + l+1);
+	    buf_p +=
+		erts_sprintf(
+		    buf_p, "%lu: ", (unsigned long) ifrow.dwIndex);
+	    utf8_encode(ifrow.bDescr, ifrow.dwDescrLen, buf_p);
+	    buf_p += l;
+	    *buf_p++ = '\0';
+	}
+	/* Interface flags, often make up broadcast and multicast flags */
+	switch (ifrow.dwType) {
+	case IF_TYPE_ETHERNET_CSMACD:
+	    flags |= INET_IFF_BROADCAST;
+	    break;
+	case IF_TYPE_SOFTWARE_LOOPBACK:
+	    flags |= INET_IFF_LOOPBACK;
+	    flags &= ~INET_IFF_MULTICAST;
+	    break;
+	default:
+	    flags &= ~INET_IFF_MULTICAST;
+	    break;
+	}
+	if (ifrow.dwAdminStatus) {
+	    flags |= INET_IFF_UP;
+	    switch (ifrow.dwOperStatus) {
+	    case IF_OPER_STATUS_CONNECTING:
+		flags |= INET_IFF_POINTTOPOINT;
+		break;
+	    case IF_OPER_STATUS_CONNECTED:
+		flags |= INET_IFF_RUNNING | INET_IFF_POINTTOPOINT;
+		break;
+	    case IF_OPER_STATUS_OPERATIONAL:
+		flags |= INET_IFF_RUNNING;
+		break;
+	    }
+	}
+	BUF_ENSURE(1 + 4);
+	*buf_p++ = INET_IFOPT_FLAGS;
+	put_int32(flags, buf_p); buf_p += 4;
+	if (ipaddrrow_p) {
+	    /* Legacy implementation through GetIpAddrTable */
+	    struct sockaddr_in sin;
+	    /* IP Address */
+	    sys_memzero(&sin, sizeof(sin));
+	    sin.sin_family = AF_INET;
+	    sin.sin_addr.s_addr = ipaddrrow_p->dwAddr;
+	    BUF_ENSURE(1);
+	    /* Netmask */
+	    SOCKADDR_TO_BUF(INET_IFOPT_ADDR, (struct sockaddr *) &sin);
+	    sin.sin_addr.s_addr = ipaddrrow_p->dwMask;
+	    BUF_ENSURE(1);
+	    SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, (struct sockaddr *) &sin);
+	    if (flags & INET_IFF_BROADCAST) {
+		/* Broadcast address - fake it*/
+		sin.sin_addr.s_addr = ipaddrrow_p->dwAddr;
+		sin.sin_addr.s_addr |= ~ipaddrrow_p->dwMask;
+		BUF_ENSURE(1);
+		SOCKADDR_TO_BUF(
+		    INET_IFOPT_BROADADDR, (struct sockaddr *) &sin);
+	    }
+	} else {
+	    IP_ADAPTER_UNICAST_ADDRESS *p;
+	    /* IP Address(es) */
+	    for (p = ia_p->FirstUnicastAddress;
+		p;
+		p = p->Next)
+	    {
+		IP_ADAPTER_PREFIX *q;
+		ULONG shortest_length;
+		struct sockaddr *shortest_p, *sa_p = p->Address.lpSockaddr;
+		BUF_ENSURE(1);
+		SOCKADDR_TO_BUF(INET_IFOPT_ADDR, sa_p);
+		shortest_p = NULL;
+		shortest_length = 0;
+		for (q = ia_p->FirstPrefix;
+		     q;
+		     q = q->Next) {
+		    struct sockaddr *sp_p = q->Address.lpSockaddr;
+		    if (sa_p->sa_family != sp_p->sa_family) continue;
+		    switch (sa_p->sa_family) {
+		    case AF_INET: {
+			struct sockaddr_in sin;
+			DWORD sa, sp, mask;
+			sa = ntohl((DWORD)
+				   ((struct sockaddr_in *)
+				    sa_p)->sin_addr.s_addr);
+			sp = ntohl((DWORD)
+				   ((struct sockaddr_in *)
+				    sp_p)->sin_addr.s_addr);
+			mask = 0xFFFFFFFF << (32 - q->PrefixLength);
+			if ((sa & mask) != (sp & mask)) continue;
+			if ((! shortest_p)
+			    || q->PrefixLength < shortest_length) {
+			    shortest_p = sp_p;
+			    shortest_length = q->PrefixLength;
+			}
+		    }   break;
+		    case AF_INET6: {
+			struct sockaddr_in6 sin6;
+			if (!eq_masked_bytes((char *)
+					     &((struct sockaddr_in6 *)
+					       sa_p)->sin6_addr,
+					     (char *)
+					     &((struct sockaddr_in6 *)
+					       sp_p)->sin6_addr,
+					     q->PrefixLength)) {
+			    continue;
+			}
+			if ((! shortest_p)
+			    || q->PrefixLength < shortest_length) {
+			    shortest_p = sp_p;
+			    shortest_length = q->PrefixLength;
+			}
+		    }   break;
+		    }
+		}
+		if (! shortest_p) {
+		    /* Found no shortest prefix */
+		    shortest_p = sa_p;
+		    switch (shortest_p->sa_family) {
+		    case AF_INET: {
+			/* Fall back to old classfull network addresses */
+			DWORD addr = ntohl(((struct sockaddr_in *)shortest_p)
+					   ->sin_addr.s_addr);
+			if (! (addr & 0x800000)) {
+			    /* Class A */
+			    shortest_length = 8;
+			} else if (! (addr & 0x400000)) {
+			    /* Class B */
+			    shortest_length = 16;
+			} else if (! (addr & 0x200000)) {
+			    /* Class C */
+			    shortest_length = 24;
+			} else {
+			    shortest_length = 32;
+			}
+		    }   break;
+		    case AF_INET6: {
+			/* Just play it safe */
+			shortest_length = 128;
+		    }   break;
+		    }
+		}
+		switch (shortest_p->sa_family) {
+		case AF_INET: {
+		    struct sockaddr_in sin;
+		    DWORD mask = 0xFFFFFFFF << (32 - shortest_length);
+		    sys_memzero(&sin, sizeof(sin));
+		    sin.sin_family = shortest_p->sa_family;
+		    sin.sin_addr.s_addr = htonl(mask);
+		    BUF_ENSURE(1);
+		    SOCKADDR_TO_BUF(INET_IFOPT_NETMASK,
+				    (struct sockaddr *) &sin);
+		    if (flags & INET_IFF_BROADCAST) {
+			DWORD sp =
+			    ntohl((DWORD)
+				  ((struct sockaddr_in *)shortest_p)
+				  -> sin_addr.s_addr);
+			sin.sin_addr.s_addr = htonl(sp | ~mask);
+			BUF_ENSURE(1);
+			SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR,
+					(struct sockaddr *) &sin);
+		    }
+		}   break;
+		case AF_INET6: {
+		    struct sockaddr_in6 sin6;
+		    sys_memzero(&sin6, sizeof(sin6));
+		    sin6.sin6_family = shortest_p->sa_family;
+		    set_netmask_bytes((char *) &sin6.sin6_addr,
+				      16,
+				      shortest_length);
+		    BUF_ENSURE(1);
+		    SOCKADDR_TO_BUF(INET_IFOPT_NETMASK,
+				    (struct sockaddr *) &sin6);
+		}   break;
+		}
+	    }
+	}
+	if (ifrow.dwPhysAddrLen) {
+	    /* Hardware Address */
+	    BUF_ENSURE(1 + 2 + ifrow.dwPhysAddrLen);
+	    *buf_p++ = INET_IFOPT_HWADDR;
+	    put_int16(ifrow.dwPhysAddrLen, buf_p); buf_p += 2;
+	    sys_memcpy(buf_p, ifrow.bPhysAddr, ifrow.dwPhysAddrLen);
+	    buf_p += ifrow.dwPhysAddrLen;
+	}
+
+done:
+	/* That is all for this interface */
+	BUF_ENSURE(1);
+	*buf_p++ = '\0';
+	if (ia_p &&
+	    ia_p->Ipv6IfIndex &&
+	    ia_p->Ipv6IfIndex != index)
+	{
+	    /* Oops, there was an other interface for IPv6. Possible? XXX */
+	    index = ia_p->Ipv6IfIndex;
+	    goto index;
+	}
+    }
+
+    if (ip_adaddrs_p) FREE(ip_adaddrs_p);
+    if (info_p) FREE(info_p);
+    if (ip_addrs_p) FREE(ip_addrs_p);
+
+    buf_size = buf_p - buf_alloc_p;
+    buf_alloc_p = REALLOC(buf_alloc_p, buf_size);
+    /* buf_p is now unreliable */
+    *rbuf_pp = buf_alloc_p;
+    return buf_size;
+#   undef BUF_ENSURE
+}
+
+#elif defined(HAVE_GETIFADDRS)
+
+static int inet_ctl_getifaddrs(inet_descriptor* desc_p,
+			       char **rbuf_pp, int rsize)
+{
+    struct ifaddrs *ifa_p, *ifa_free_p;
+
+    int buf_size;
+    char *buf_p;
+    char *buf_alloc_p;
+
+    buf_size = 512;
+    buf_alloc_p = ALLOC(buf_size);
+    buf_p = buf_alloc_p;
+#   define BUF_ENSURE(Size)						\
+    do {								\
+	int NEED_, GOT_ = buf_p - buf_alloc_p;				\
+	NEED_ = GOT_ + (Size);						\
+	if (NEED_ > buf_size) {						\
+	    buf_size = NEED_ + 512;					\
+	    buf_alloc_p = REALLOC(buf_alloc_p, buf_size);		\
+	    buf_p = buf_alloc_p + GOT_;					\
+	}								\
+    } while (0)
+#   define SOCKADDR_TO_BUF(opt, sa)				        \
+    do {    						                \
+	if (sa) {                                                       \
+	    char *P_;							\
+	    *buf_p++ = (opt);						\
+	    while (! (P_ = sockaddr_to_buf((sa), buf_p,			\
+					   buf_alloc_p+buf_size))) {	\
+		int GOT_ = buf_p - buf_alloc_p;				\
+		buf_size += 512;					\
+		buf_alloc_p = REALLOC(buf_alloc_p, buf_size);		\
+		buf_p = buf_alloc_p + GOT_;				\
+	    }								\
+	    if (P_ == buf_p) {						\
+		buf_p--;						\
+	    } else {							\
+		buf_p = P_;						\
+	    }								\
+	}                                                               \
+    } while (0)
+
+    if (getifaddrs(&ifa_p) < 0) {
+	return ctl_error(sock_errno(), rbuf_pp, rsize);
+    }
+    ifa_free_p = ifa_p;
+    *buf_p++ = INET_REP_OK;
+    for (;  ifa_p;  ifa_p = ifa_p->ifa_next) {
+	int len = utf8_len(ifa_p->ifa_name, -1);
+	BUF_ENSURE(len+1 + 1+4 + 1);
+	utf8_encode(ifa_p->ifa_name, -1, buf_p);
+	buf_p += len;
+	*buf_p++ = '\0';
+	*buf_p++ = INET_IFOPT_FLAGS;
+	put_int32(IFGET_FLAGS(ifa_p->ifa_flags), buf_p); buf_p += 4;
+	if (ifa_p->ifa_addr->sa_family == AF_INET
+#if defined(AF_INET6)
+	    || ifa_p->ifa_addr->sa_family == AF_INET6
+#endif
+	    ) {
+	    SOCKADDR_TO_BUF(INET_IFOPT_ADDR, ifa_p->ifa_addr);
+	    BUF_ENSURE(1);
+	    SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, ifa_p->ifa_netmask);
+	    if (ifa_p->ifa_flags & IFF_POINTOPOINT) {
+		BUF_ENSURE(1);
+		SOCKADDR_TO_BUF(INET_IFOPT_DSTADDR, ifa_p->ifa_dstaddr);
+	    } else if (ifa_p->ifa_flags & IFF_BROADCAST) {
+		BUF_ENSURE(1);
+		SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR, ifa_p->ifa_broadaddr);
+	    }
+	}
+#if defined(AF_LINK) || defined(AF_PACKET)
+	else if (
+#if defined(AF_LINK)
+		 ifa_p->ifa_addr->sa_family == AF_LINK
+#else
+		 0
+#endif
+#if defined(AF_PACKET)
+		 || ifa_p->ifa_addr->sa_family == AF_PACKET
+#endif
+		 ) {
+	    char *bp = buf_p;
+	    BUF_ENSURE(1);
+	    SOCKADDR_TO_BUF(INET_IFOPT_HWADDR, ifa_p->ifa_addr);
+	    if (buf_p - bp < 4) buf_p = bp; /* Empty hwaddr */
+	}
+#endif
+	BUF_ENSURE(1);
+	*buf_p++ = '\0';
+    }
+    buf_size = buf_p - buf_alloc_p;
+    buf_alloc_p = REALLOC(buf_alloc_p, buf_size);
+    /* buf_p is now unreliable */
+    freeifaddrs(ifa_free_p);
+    *rbuf_pp = buf_alloc_p;
+    return buf_size;
+#   undef BUF_ENSURE
+}
+
+#else
+
+static int inet_ctl_getifaddrs(inet_descriptor* desc_p,
+			       char **rbuf_pp, int rsize)
+{
+    return ctl_error(ENOTSUP, rbuf_pp, rsize);
+}
+
+#endif
+
+
+
 #ifdef VXWORKS
 /*
 ** THIS is a terrible creature, a bug in the TCP part
@@ -5293,12 +5882,15 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len)
 	    if (pmtud_enable)			cflags |= SPP_PMTUD_ENABLE;
 	    if (pmtud_disable)			cflags |= SPP_PMTUD_DISABLE;
 
+#	    ifdef HAVE_STRUCT_SCTP_PADDRPARAMS_SPP_SACKDELAY
+	    /* The followings are missing in FreeBSD 7.1 */
 	    sackdelay_enable =eflags& SCTP_FLAG_SACDELAY_ENABLE;
 	    sackdelay_disable=eflags& SCTP_FLAG_SACDELAY_DISABLE;
 	    if (sackdelay_enable && sackdelay_disable)
 		return -1;
 	    if (sackdelay_enable)		cflags |= SPP_SACKDELAY_ENABLE;
 	    if (sackdelay_disable)		cflags |= SPP_SACKDELAY_DISABLE;
+#           endif
 
 	    arg.pap.spp_flags  = cflags;
 #	    endif
@@ -6199,13 +6791,15 @@ static int sctp_fill_opts(inet_descriptor* desc, char* buf, int buflen,
 	    
 	    if (ap.spp_flags & SPP_PMTUD_DISABLE)
 		{ i = LOAD_ATOM (spec, i, am_pmtud_disable);         n++; }
-	    
+#	    ifdef HAVE_STRUCT_SCTP_PADDRPARAMS_SPP_SACKDELAY
+	    /* SPP_SACKDELAY_* not in FreeBSD 7.1 */
 	    if (ap.spp_flags & SPP_SACKDELAY_ENABLE)
 		{ i = LOAD_ATOM (spec, i, am_sackdelay_enable);      n++; }
 	    
 	    if (ap.spp_flags & SPP_SACKDELAY_DISABLE)
 		{ i = LOAD_ATOM (spec, i, am_sackdelay_disable);     n++; }
 #	    endif
+#	    endif
 	    
 	    PLACE_FOR(spec, i,
 		      LOAD_NIL_CNT + LOAD_LIST_CNT + 2*LOAD_TUPLE_CNT);
@@ -6676,6 +7270,13 @@ static int inet_ctl(inet_descriptor* desc, int cmd, char* buf, int len,
 	return inet_ctl_getiflist(desc, rbuf, rsize);
     }
 
+    case INET_REQ_GETIFADDRS: {
+	DEBUGF(("inet_ctl(%ld): GETIFADDRS\r\n", (long)desc->port));
+	if (!IS_OPEN(desc))
+	    return ctl_xerror(EXBADPORT, rbuf, rsize);
+	return inet_ctl_getifaddrs(desc, rbuf, rsize);
+    }
+
     case INET_REQ_IFGET: {
 	DEBUGF(("inet_ctl(%ld): IFGET\r\n", (long)desc->port)); 	
 	if (!IS_OPEN(desc))
diff --git a/erts/etc/common/inet_gethost.c b/erts/etc/common/inet_gethost.c
index d3ff4874ac..e095836258 100644
--- a/erts/etc/common/inet_gethost.c
+++ b/erts/etc/common/inet_gethost.c
@@ -59,6 +59,7 @@
 #define WIN32_LEAN_AND_MEAN
 #include <winsock2.h>
 #include <windows.h>
+#include <ws2tcpip.h>
 #include <process.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/erts/etc/win32/cygwin_tools/vc/ld.sh b/erts/etc/win32/cygwin_tools/vc/ld.sh
index b04935ed9b..d3b53eb5bc 100755
--- a/erts/etc/win32/cygwin_tools/vc/ld.sh
+++ b/erts/etc/win32/cygwin_tools/vc/ld.sh
@@ -53,7 +53,7 @@ while test -n "$1" ; do
 	    STDLIB_FORCED=true;
 	    STDLIB=LIBCMTD.LIB;; 
 	-lsocket)
-	    DEFAULT_LIBRARIES="$DEFAULT_LIBRARIES WS2_32.LIB";;
+	    DEFAULT_LIBRARIES="$DEFAULT_LIBRARIES WS2_32.LIB IPHLPAPI.LIB";;
 	-l*)
 	    y=`echo $x | sed 's,^-l\(.*\),\1,g'`;
 	    MPATH=`cygpath -m $y`;
diff --git a/erts/preloaded/ebin/prim_inet.beam b/erts/preloaded/ebin/prim_inet.beam
index a777971b32..3f53f35273 100644
--- a/erts/preloaded/ebin/prim_inet.beam
+++ b/erts/preloaded/ebin/prim_inet.beam
diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl
index 91d39c6a73..446656e45f 100644
--- a/erts/preloaded/src/prim_inet.erl
+++ b/erts/preloaded/src/prim_inet.erl
@@ -37,7 +37,7 @@
 -export([setopt/3, setopts/2, getopt/2, getopts/2, is_sockopt_val/2]).
 -export([chgopt/3, chgopts/2]).
 -export([getstat/2, getfd/1, getindex/1, getstatus/1, gettype/1, 
-	 getiflist/1, ifget/3, ifset/3,
+	 getifaddrs/1, getiflist/1, ifget/3, ifset/3,
 	 gethostname/1]).
 -export([getservbyname/3, getservbyport/3]).
 -export([peername/1, setpeername/2]).
@@ -216,9 +216,10 @@ bindx(S, AddFlag, Addrs) ->
 	sctp ->
 	    %% Really multi-homed "bindx". Stringified args:
 	    %% [AddFlag, (Port, IP)+]:
-	    Args = ?int8(AddFlag) ++
-		lists:concat([?int16(Port)++ip_to_bytes(IP) ||
-				 {IP, Port} <- Addrs]),
+	    Args =
+		[?int8(AddFlag)|
+		 [[?int16(Port)|ip_to_bytes(IP)] ||
+		     {IP, Port} <- Addrs]],
 	    case ctl_cmd(S, ?SCTP_REQ_BINDX, Args) of
 		{ok,_} -> {ok, S};
 		Error  -> Error
@@ -623,7 +624,7 @@ chgopt(S, Opt, Value) when is_port(S) ->
     chgopts(S, [{Opt,Value}]).
 
 chgopts(S, Opts) when is_port(S), is_list(Opts) ->
-    case inet:getopts(S, need_template(Opts)) of
+    case getopts(S, need_template(Opts)) of
 	{ok,Templates} ->
 	    try merge_options(Opts, Templates) of
 		NewOpts ->
@@ -636,7 +637,94 @@ chgopts(S, Opts) when is_port(S), is_list(Opts) ->
     
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%
-%% IFLIST(insock()) -> {ok,IfNameList} | {error, Reason}
+%% getifaddrs(insock()) -> {ok,IfAddrsList} | {error, Reason}
+%%
+%%   IfAddrsList = [{Name,[Opts]}]
+%%   Name = string()
+%%   Opts = {flags,[Flag]} | {addr,Addr} | {netmask,Addr} | {broadaddr,Addr}
+%%        | {dstaddr,Addr} | {hwaddr,HwAddr} | {mtu,integer()}
+%%   Flag = up | broadcast | loopback | running | multicast
+%%   Addr = ipv4addr() | ipv6addr()
+%%   HwAddr = ethernet_addr()
+%%
+%% get interface name and addresses list
+%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+getifaddrs(S) when is_port(S) ->
+    case ctl_cmd(S, ?INET_REQ_GETIFADDRS, []) of
+	{ok, Data} ->
+	    {ok, comp_ifaddrs(build_ifaddrs(Data), ktree_empty())};
+	{error,enotsup} ->
+	    case getiflist(S) of
+		{ok, IFs} ->
+		    {ok, getifaddrs_ifget(S, IFs)};
+		Err1 -> Err1
+	    end;
+	Err2 -> Err2
+    end.
+
+%% Restructure interface properties per interface and remove duplicates
+
+comp_ifaddrs([{If,Opts}|IfOpts], T) ->
+    case ktree_is_defined(If, T) of
+	true ->
+	    OptSet = comp_ifaddrs_add(ktree_get(If, T), Opts),
+	    comp_ifaddrs(IfOpts, ktree_update(If, OptSet, T));
+	false ->
+	    OptSet = comp_ifaddrs_add(ktree_empty(), Opts),
+	    comp_ifaddrs(IfOpts, ktree_insert(If, OptSet, T))
+     end;
+comp_ifaddrs([], T) ->
+    [{If,ktree_keys(ktree_get(If, T))} || If <- ktree_keys(T)].
+
+comp_ifaddrs_add(OptSet, [Opt|Opts]) ->
+    case ktree_is_defined(Opt, OptSet) of
+	true
+	  when element(1, Opt) =:= flags;
+	       element(1, Opt) =:= hwaddr ->
+	    comp_ifaddrs_add(OptSet, Opts);
+	_ ->
+	    comp_ifaddrs_add(ktree_insert(Opt, undefined, OptSet), Opts)
+    end;
+comp_ifaddrs_add(OptSet, []) -> OptSet.
+
+%% Legacy emulation of getifaddrs
+
+getifaddrs_ifget(_, []) -> [];
+getifaddrs_ifget(S, [IF|IFs]) ->
+    case ifget(S, IF, [flags]) of
+	{ok,[{flags,Flags}]=FlagsVals} ->
+	    BroadOpts =
+		case member(broadcast, Flags) of
+		    true ->
+			[broadaddr,hwaddr];
+		    false ->
+			[hwaddr]
+		end,
+	    P2POpts =
+		case member(pointtopoint, Flags) of
+		    true ->
+			[dstaddr|BroadOpts];
+		    false ->
+			BroadOpts
+		end,
+	    getifaddrs_ifget(S, IFs, IF, FlagsVals, [addr,netmask|P2POpts]);
+	_ ->
+	    getifaddrs_ifget(S, IFs, IF, [], [addr,netmask,hwaddr])
+    end.
+
+getifaddrs_ifget(S, IFs, IF, FlagsVals, Opts) ->
+    OptVals =
+	case ifget(S, IF, Opts) of
+	    {ok,OVs} -> OVs;
+	    _ -> []
+	end,
+    [{IF,FlagsVals++OptVals}|getifaddrs_ifget(S, IFs)].
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%
+%% getiflist(insock()) -> {ok,IfNameList} | {error, Reason}
 %%
 %% get interface name list
 %%
@@ -1325,6 +1413,19 @@ type_value_2({enum,List}, Enum) ->
 	{value,_} 				    -> true;
 	false                                       -> false
     end;
+type_value_2(sockaddr, Addr) ->
+    case Addr of
+	any                                         -> true;
+	loopback                                    -> true;
+	{A,B,C,D} when ?ip(A,B,C,D)                 -> true;
+	{A,B,C,D,E,F,G,H} when ?ip6(A,B,C,D,E,F,G,H) -> true;
+	_                                           -> false
+    end;
+type_value_2(linkaddr, Addr) when is_list(Addr) ->
+    case len(Addr, 32768) of
+	undefined                                   -> false;
+	_                                           -> true
+    end;
 type_value_2({bitenumlist,List}, EnumList) -> 
     case enum_vals(EnumList, List) of
 	Ls when is_list(Ls)                         -> true;
@@ -1413,14 +1514,21 @@ enc_value_2(addr, {any,Port}) ->
     [?INET_AF_ANY|?int16(Port)];
 enc_value_2(addr, {loopback,Port}) ->
     [?INET_AF_LOOPBACK|?int16(Port)];
-enc_value_2(addr, {IP,Port}) ->
-    case tuple_size(IP) of
-	4 ->
-	    [?INET_AF_INET,?int16(Port)|ip4_to_bytes(IP)];
-	8 ->
-	    [?INET_AF_INET6,?int16(Port)|ip6_to_bytes(IP)]
-    end;
+enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 4 ->
+    [?INET_AF_INET,?int16(Port)|ip4_to_bytes(IP)];
+enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 8 ->
+    [?INET_AF_INET6,?int16(Port)|ip6_to_bytes(IP)];
 enc_value_2(ether, [X1,X2,X3,X4,X5,X6]) -> [X1,X2,X3,X4,X5,X6];
+enc_value_2(sockaddr, any) ->
+    [?INET_AF_ANY];
+enc_value_2(sockaddr, loopback) ->
+    [?INET_AF_LOOPBACK];
+enc_value_2(sockaddr, IP) when tuple_size(IP) =:= 4 ->
+    [?INET_AF_INET|ip4_to_bytes(IP)];
+enc_value_2(sockaddr, IP) when tuple_size(IP) =:= 8 ->
+    [?INET_AF_INET6|ip6_to_bytes(IP)];
+enc_value_2(linkaddr, Linkaddr) ->
+    [?int16(length(Linkaddr)),Linkaddr];
 enc_value_2(sctp_assoc_id, Val) -> ?int32(Val);
 %% enc_value_2(sctp_assoc_id, Bin) -> [byte_size(Bin),Bin];
 enc_value_2({enum,List}, Enum) ->
@@ -1465,6 +1573,10 @@ dec_value(time, [X3,X2,X1,X0|T]) ->
     end;
 dec_value(ip, [A,B,C,D|T])             -> {{A,B,C,D}, T};
 dec_value(ether,[X1,X2,X3,X4,X5,X6|T]) -> {[X1,X2,X3,X4,X5,X6],T};
+dec_value(sockaddr, [X|T]) ->
+    get_ip(X, T);
+dec_value(linkaddr, [X1,X0|T]) ->
+    split(?i16(X1,X0), T);
 dec_value({enum,List}, [X3,X2,X1,X0|T]) ->
     Val = ?i32(X3,X2,X1,X0),
     case enum_name(Val, List) of
@@ -1480,7 +1592,7 @@ dec_value({bitenumlist,List}, [X3,X2,X1,X0|T]) ->
 %%     {enum_names(Val, List), T};
 dec_value(binary,[L0,L1,L2,L3|List]) ->
     Len = ?i32(L0,L1,L2,L3),
-    {X,T}=lists:split(Len,List),
+    {X,T}=split(Len,List),
     {list_to_binary(X),T};
 dec_value(Types, List) when is_tuple(Types) ->
     {L,T} = dec_value_tuple(Types, List, 1, []),
@@ -1495,7 +1607,7 @@ dec_value_tuple(Types, List, N, Acc)
     {Term,Tail} = dec_value(element(N, Types), List),
     dec_value_tuple(Types, Tail, N+1, [Term|Acc]);
 dec_value_tuple(_, List, _, Acc) ->
-    {lists:reverse(Acc),List}.
+    {rev(Acc),List}.
 
 borlist([V|Vs], Value) ->
     borlist(Vs, V bor Value);
@@ -1702,11 +1814,11 @@ merge_fields(_, _, _) -> [].
 %%
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-type_ifopt(addr)      -> ip;
-type_ifopt(broadaddr) -> ip;
-type_ifopt(dstaddr)   -> ip;
+type_ifopt(addr)      -> sockaddr;
+type_ifopt(broadaddr) -> sockaddr;
+type_ifopt(dstaddr)   -> sockaddr;
 type_ifopt(mtu)       -> int;
-type_ifopt(netmask)   -> ip;
+type_ifopt(netmask)   -> sockaddr;
 type_ifopt(flags)     ->
     {bitenumlist,
      [{up, ?INET_IFF_UP},
@@ -1718,7 +1830,7 @@ type_ifopt(flags)     ->
       {no_pointtopoint, ?INET_IFF_NPOINTTOPOINT},
       {running, ?INET_IFF_RUNNING},
       {multicast, ?INET_IFF_MULTICAST}]};
-type_ifopt(hwaddr)    -> ether;
+type_ifopt(hwaddr)    -> linkaddr;
 type_ifopt(Opt) when is_atom(Opt) -> undefined.
 
 enc_ifopt(addr)      -> ?INET_IFOPT_ADDR;
@@ -1903,6 +2015,30 @@ encode_ifname(Name) ->
     if N > 255 -> {error, einval};
        true -> {ok,[N | Name]}
     end.
+
+build_ifaddrs(Cs) ->
+    build_ifaddrs(Cs, []).
+%%
+build_ifaddrs([], []) ->
+    [];
+build_ifaddrs([0|Cs], Acc) ->
+    Name = utf8_to_characters(rev(Acc)),
+    {Opts,Rest} = build_ifaddrs_opts(Cs, []),
+    [{Name,Opts}|build_ifaddrs(Rest)];
+build_ifaddrs([C|Cs], Acc) ->
+    build_ifaddrs(Cs, [C|Acc]).
+
+build_ifaddrs_opts([0|Cs], Acc) ->
+    {rev(Acc),Cs};
+build_ifaddrs_opts([C|Cs]=CCs, Acc) ->
+    case dec_ifopt(C) of
+	undefined ->
+	    erlang:error(badarg, [CCs,Acc]);
+	Opt ->
+	    Type = type_ifopt(Opt),
+	    {Val,Rest} = dec_value(Type, Cs),
+	    build_ifaddrs_opts(Rest, [{Opt,Val}|Acc])
+    end.
     
 build_iflist(Cs) ->
     build_iflist(Cs, [], []).
@@ -1927,6 +2063,80 @@ rev(L) -> rev(L,[]).
 rev([C|L],Acc) -> rev(L,[C|Acc]);
 rev([],Acc) -> Acc.
 
+split(N, L) -> split(N, L, []).
+split(0, L, R) when is_list(L) -> {rev(R),L};
+split(N, [H|T], R) when is_integer(N), N > 0 -> split(N-1, T, [H|R]).
+
+len(L, N) -> len(L, N, 0).
+len([], N, C) when is_integer(N), N >= 0 -> C;
+len(L, 0, _) when is_list(L) -> undefined;
+len([_|L], N, C) when is_integer(N), N >= 0 -> len(L, N-1, C+1).
+
+member(X, [X|_]) -> true;
+member(X, [_|Xs]) -> member(X, Xs);
+member(_, []) -> false.
+
+
+
+%% Lookup tree that keeps key insert order
+
+ktree_empty() -> {[],tree()}.
+ktree_is_defined(Key, {_,T}) -> tree(T, Key, is_defined).
+ktree_get(Key, {_,T}) -> tree(T, Key, get).
+ktree_insert(Key, V, {Keys,T}) -> {[Key|Keys],tree(T, Key, {insert,V})}.
+ktree_update(Key, V, {Keys,T}) -> {Keys,tree(T, Key, {update,V})}.
+ktree_keys({Keys,_}) -> rev(Keys).
+
+%% Simple lookup tree. Hash the key to get statistical balance.
+%% Key is matched equal, not compared equal.
+
+tree() -> nil.
+tree(T, Key, Op) -> tree(T, Key, Op, erlang:phash2(Key)).
+
+tree(nil, _, is_defined, _) -> false;
+tree(nil, K, {insert,V}, _) -> {K,V,nil,nil};
+tree({K,_,_,_}, K, is_defined, _) -> true;
+tree({K,V,_,_}, K, get, _) -> V;
+tree({K,_,L,R}, K, {update,V}, _) -> {K,V,L,R};
+tree({K0,V0,L,R}, K, Op, H) ->
+    H0 = erlang:phash2(K0),
+    if  H0 < H;  H0 =:= H, K0 < K ->
+	    if  is_tuple(Op) ->
+		    {K0,V0,tree(L, K, Op, H),R};
+		true ->
+		    tree(L, K, Op, H)
+	    end;
+	true ->
+	    if  is_tuple(Op) ->
+		    {K0,V0,L,tree(R, K, Op, H)};
+		true ->
+		    tree(R, K, Op, H)
+	    end
+    end.
+
+
+
+utf8_to_characters([]) -> [];
+utf8_to_characters([B|Bs]=Arg) when (B band 16#FF) =:= B ->
+    if  16#F8 =< B ->
+	    erlang:error(badarg, [Arg]);
+	16#F0 =< B ->
+	    utf8_to_characters(Bs, B band 16#07, 3);
+	16#E0 =< B ->
+	    utf8_to_characters(Bs, B band 16#0F, 2);
+	16#C0 =< B ->
+	    utf8_to_characters(Bs, B band 16#1F, 1);
+	16#80 =< B ->
+	    erlang:error(badarg, [Arg]);
+	true ->
+	    [B|utf8_to_characters(Bs)]
+    end.
+%%
+utf8_to_characters(Bs, U, 0) ->
+    [U|utf8_to_characters(Bs)];
+utf8_to_characters([B|Bs], U, N) when ((B band 16#3F) bor 16#80) =:= B ->
+    utf8_to_characters(Bs, (U bsl 6) bor (B band 16#3F), N-1).
+
 ip_to_bytes(IP) when tuple_size(IP) =:= 4 -> ip4_to_bytes(IP);
 ip_to_bytes(IP) when tuple_size(IP) =:= 8 -> ip6_to_bytes(IP).