Not all Windows pcaps have pcap_wsockinit().

WinPcap 4.1.3 has only wsockinit(); check for both, on Windows.

3 files changed, 22 insertions, 2 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 848626f5..7e2b9db5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -594,6 +594,17 @@ check_function_exists(pcap_open HAVE_PCAP_OPEN)
 check_function_exists(pcap_findalldevs_ex HAVE_PCAP_FINDALLDEVS_EX)
 
 #
+# On Windows, check for pcap_wsockinit(); if we don't have it, check for
+# wsockinit().
+#
+if(WIN32)
+    check_function_exists(pcap_wsockinit HAVE_PCAP_WSOCKINIT)
+    if(NOT HAVE_PCAP_WSOCKINIT)
+        check_function_exists(wsockinit HAVE_WSOCKINIT)
+    endif(NOT HAVE_PCAP_WSOCKINIT)
+endif(WIN32)
+
+#
 # Check for special debugging functions
 #
 check_function_exists(pcap_set_parser_debug HAVE_PCAP_SET_PARSER_DEBUG)
diff --git a/cmakeconfig.h.in b/cmakeconfig.h.in
index 039bc5f3..2d28585e 100644
--- a/cmakeconfig.h.in
+++ b/cmakeconfig.h.in
@@ -174,6 +174,9 @@
 /* define if libpcap has pcap_version */
 #cmakedefine HAVE_PCAP_VERSION 1
 
+/* Define to 1 if you have the `pcap_wsockinit' function. */
+#cmakedefine HAVE_PCAP_WSOCKINIT 1
+
 /* Define to 1 if you have the `pfopen' function. */
 #cmakedefine HAVE_PFOPEN 1
 
@@ -240,6 +243,9 @@
 /* Define to 1 if you have the `vsnprintf' function. */
 #cmakedefine HAVE_VSNPRINTF 1
 
+/* Define to 1 if you have the `wsockinit' function. */
+#cmakedefine HAVE_WSOCKINIT 1
+
 /* define if libpcap has yydebug */
 #cmakedefine HAVE_YYDEBUG 1
 
diff --git a/tcpdump.c b/tcpdump.c
index ddd5551d..b325b28c 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -1346,10 +1346,13 @@ main(int argc, char **argv)
 	else
 		ndo->program_name = program_name = argv[0];
 
-#ifdef _WIN32
+#if defined(HAVE_PCAP_WSOCKINIT)
 	if (pcap_wsockinit() != 0)
 		error("Attempting to initialize Winsock failed");
-#endif /* _WIN32 */
+#elif defined(HAVE_WSOCKINIT)
+	if (wsockinit() != 0)
+		error("Attempting to initialize Winsock failed");
+#endif
 
 	/*
 	 * On platforms where the CPU doesn't support unaligned loads,