[package] uhttpd: add option to reject requests from RFC1918 IPs to public server...

[openwrt/svn-archive/archive.git] / package / uhttpd / src / uhttpd.c

diff --git a/package/uhttpd/src/uhttpd.c b/package/uhttpd/src/uhttpd.c
index 82729627e08ba0725e8bd3d179394d13deaceeee..be882470ad0b0988605a8e695c3e44488b3f1165 100644 (file)
--- a/package/uhttpd/src/uhttpd.c
+++ b/package/uhttpd/src/uhttpd.c
@@ -524,7 +524,7 @@ int main (int argc, char **argv)
 #endif
 
        while( (opt = getopt(argc, argv,
-               "fSDC:K:E:I:p:s:h:c:l:L:d:r:m:x:t:T:")) > 0
+               "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:x:t:T:")) > 0
        ) {
                switch(opt)
                {
@@ -648,6 +648,10 @@ int main (int argc, char **argv)
                                conf.no_dirlists = 1;
                                break;
 
+                       case 'R':
+                               conf.rfc1918_filter = 1;
+                               break;
+
 #ifdef HAVE_CGI
                        /* cgi prefix */
                        case 'x':
@@ -728,6 +732,7 @@ int main (int argc, char **argv)
                                        "       -I string       Use given filename as index page for directories\n"
                                        "       -S              Do not follow symbolic links outside of the docroot\n"
                                        "       -D              Do not allow directory listings, send 403 instead\n"
+                                       "       -R              Enable RFC1918 filter\n"
 #ifdef HAVE_LUA
                                        "       -l string       URL prefix for Lua handler, default is '/lua'\n"
                                        "       -L file         Lua handler script, omit to disable Lua\n"
@@ -932,6 +937,14 @@ int main (int argc, char **argv)
                                        /* parse message header */
                                        if( (req = uh_http_header_recv(cl)) != NULL )
                                        {
+                                               /* RFC1918 filtering required? */
+                                               if( conf.rfc1918_filter && sa_rfc1918(&cl->peeraddr) &&
+                                                   !sa_rfc1918(&cl->servaddr) )
+                                               {
+                                                       uh_http_sendhf(cl, 403, "Forbidden",
+                                                               "Rejected request from RFC1918 IP to public server address");
+                                               }
+                                               else
 #ifdef HAVE_LUA
                                                /* Lua request? */
                                                if( L && uh_path_match(conf.lua_prefix, req->url) )