fix: using incomplete struct sockaddr_in

Some platform SDKs don't `#include <netinet/in.h>` in `sys/socket.h`.

Author: sergio-nsk

CMakeLists.txt

@@ -258,6 +258,7 @@ endif()
 if(NOT WIN32)
     check_include_file("net/if_arp.h" HAVE_NET_IF_ARP_H)
     check_include_file("netdb.h" HAVE_NETDB_H)
+    check_include_file("netinet/in.h" HAVE_NETINET_IN_H)
 endif()
 
 configure_file(proxyres_config.h.in proxyres_config.h @ONLY NEWLINE_STYLE UNIX)

net_util.c

@@ -12,6 +12,10 @@
 #  include <netdb.h>
 #endif
 
+#if HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+
 #ifdef _WIN32
 #  include <winsock2.h>
 #  include <ws2tcpip.h>

proxyres_config.h.in

@@ -3,3 +3,6 @@
 
 // Define to 1 if you have the <netdb.h> header file.
 #cmakedefine HAVE_NETDB_H 1
+
+// Define to 1 if you have the <netinet/in.h> header file.
+#cmakedefine HAVE_NETINET_IN_H 1

wpad_dhcp_posix.c

@@ -13,6 +13,10 @@
 #  include <netdb.h>
 #endif
 
+#if HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+
 #ifdef _WIN32
 #  include <winsock2.h>
 #  include <ws2tcpip.h>