Define SOLARIS_BPF_PCAP_CAPTURE for Solaris 11.

Solaris 11 uses BPF packet capture rather than DLPI, which requires
different handling in many cases. The new preprocessor symbol tells when
this is the case; it is additional granularity on top of SOLARIS.

configure

@@ -4718,6 +4718,13 @@ _ACEOF
 
 fi
 
+    ;;
+  *-solaris2.1[1-9]*)
+    $as_echo "#define SOLARIS 1" >>confdefs.h
+
+    # Solaris 11 and later use BPF packet capture rather than DLPI.
+    $as_echo "#define SOLARIS_BPF_PCAP_CAPTURE 1" >>confdefs.h
+
     ;;
   *-solaris2.0*)
     $as_echo "#define STUPID_SOLARIS_CHECKSUM_BUG 1" >>confdefs.h

configure.ac

@@ -123,6 +123,11 @@ case "$host" in
     AC_CHECK_LIB(cfg, _system_configuration)
     AC_CHECK_LIB(crypt, crypt_r)
     ;;
+  *-solaris2.1[[1-9]]*)
+    AC_DEFINE(SOLARIS)
+    # Solaris 11 and later use BPF packet capture rather than DLPI.
+    AC_DEFINE(SOLARIS_BPF_PCAP_CAPTURE)
+    ;;
   *-solaris2.0*)  
     AC_DEFINE(STUPID_SOLARIS_CHECKSUM_BUG)
     AC_DEFINE(SOLARIS)

libnetutil/netutil.cc

@@ -857,14 +857,10 @@ void set_ttl(int sd, int ttl) {
 #endif
 }
 
-/* This should additionally be true for Solaris version 11 (but not 10 or
-   earlier), but I haven't found a preprocessor symbol that allows easily
-   testing that. Solaris 10 used DLPI for packet capture, but what OS X,
-   FreeBSD, and Solaris 11 have in common is that they use BPF. We can get away
-   with not having Solaris 11 here because the pcap_selectable_fd_one_to_one
-   test is true for all Solaris and overrides this function everywhere it is
-   used. */
-#if defined(WIN32) || defined(MACOSX) || (defined(FREEBSD) && (__FreeBSD_version < 500000))
+/* Other than WIN32, what these systems have in common is that they use BPF for
+   packet capture. (Solaris 10 and earlier used DLPI and had valid selectable
+   fds.) */
+#if defined(WIN32) || defined(MACOSX) || (defined(FREEBSD) && (__FreeBSD_version < 500000) || defined(SOLARIS_BPF_PCAP_CAPTURE))
 /* Returns whether the system supports pcap_get_selectable_fd() properly */
 int pcap_selectable_fd_valid() {
   return 0;

nmap_config.h.in

@@ -158,6 +158,7 @@
 #undef HAVE_OPENSSL
 
 #undef STUPID_SOLARIS_CHECKSUM_BUG
+#undef SOLARIS_BPF_PCAP_CAPTURE
 
 #undef SPRINTF_RETURNS_STRING
 

nsock/include/nsock_config.h.in

@@ -70,6 +70,8 @@
 #undef NETBSD
 #undef MACOSX
 
+#undef SOLARIS_BPF_PCAP_CAPTURE
+
 #undef HAVE_NET_BPF_H
 #undef HAVE_SYS_IOCTL_H
 

nsock/src/configure

@@ -2216,6 +2216,13 @@ case "$host" in
   *-hpux*)
     $as_echo "#define HPUX 1" >>confdefs.h
 
+    ;;
+  *-solaris2.1[1-9]*)
+    $as_echo "#define SOLARIS 1" >>confdefs.h
+
+    # Solaris 11 and later use BPF packet capture rather than DLPI.
+    $as_echo "#define SOLARIS_BPF_PCAP_CAPTURE 1" >>confdefs.h
+
     ;;
   *-solaris2.0*)
     $as_echo "#define SOLARIS 1" >>confdefs.h

nsock/src/configure.ac

@@ -34,6 +34,11 @@ case "$host" in
   *-hpux*)
     AC_DEFINE(HPUX)
     ;;
+  *-solaris2.1[[1-9]]*)
+    AC_DEFINE(SOLARIS)
+    # Solaris 11 and later use BPF packet capture rather than DLPI.
+    AC_DEFINE(SOLARIS_BPF_PCAP_CAPTURE)
+    ;;
   *-solaris2.0*)  
     AC_DEFINE(SOLARIS)
     ;;

nsock/src/nsock_pcap.h

@@ -83,7 +83,7 @@
  */
 
 /* Returns whether the system supports pcap_get_selectable_fd() properly */
-#if !defined(WIN32) && !defined(SOLARIS)
+#if !defined(WIN32) && !defined(SOLARIS_BPF_PCAP_CAPTURE)
 #define PCAP_CAN_DO_SELECT 1
 #endif