Reject network sockets with file descriptor values >= FD_SETSIZE

.. on platforms where they can't be select()ed. The assumption
that they are only usable for mingw32 builds on Windows might be
wrong.

diff --git a/jbsockets.c b/jbsockets.c
index d650dba..5bdfcb1 100644 (file)
--- a/jbsockets.c
+++ b/jbsockets.c
@@ -1,4 +1,4 @@
-const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.119 2012/10/23 10:17:36 fabiankeil Exp $";
+const char jbsockets_rcs[] = "$Id: jbsockets.c,v 1.120 2013/01/01 22:11:08 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/jbsockets.c,v $
@@ -278,6 +278,17 @@ static jb_socket rfc2553_connect_to(const char *host, int portnum, struct client
          continue;
       }
 
+#ifndef _WIN32
+      if (fd >= FD_SETSIZE)
+      {
+         log_error(LOG_LEVEL_ERROR,
+            "Server socket number too high to use select(): %d >= %d",
+            fd, FD_SETSIZE);
+         close_socket(fd);
+         return JB_INVALID_SOCKET;
+      }
+#endif
+
 #ifdef TCP_NODELAY
       {  /* turn off TCP coalescence */
          int mi = 1;
@@ -460,6 +471,17 @@ static jb_socket no_rfc2553_connect_to(const char *host, int portnum, struct cli
       return(JB_INVALID_SOCKET);
    }
 
+#ifndef _WIN32
+   if (fd >= FD_SETSIZE)
+   {
+      log_error(LOG_LEVEL_ERROR,
+         "Server socket number too high to use select(): %d >= %d",
+         fd, FD_SETSIZE);
+      close_socket(fd);
+      return JB_INVALID_SOCKET;
+   }
+#endif
+
 #ifdef TCP_NODELAY
    {  /* turn off TCP coalescence */
       int mi = 1;
@@ -1286,6 +1308,17 @@ int accept_connection(struct client_state * csp, jb_socket fds[])
    }
 #endif
 
+#ifndef _WIN32
+   if (afd >= FD_SETSIZE)
+   {
+      log_error(LOG_LEVEL_ERROR,
+         "Client socket number too high to use select(): %d >= %d",
+         afd, FD_SETSIZE);
+      close_socket(afd);
+      return 0;
+   }
+#endif
+
    csp->cfd = afd;
 #ifdef HAVE_RFC2553
    csp->ip_addr_str = malloc(NI_MAXHOST);

diff --git a/jcc.c b/jcc.c
index 53de19a..8d3c79e 100644 (file)
--- a/jcc.c
+++ b/jcc.c
@@ -1,4 +1,4 @@
-const char jcc_rcs[] = "$Id: jcc.c,v 1.421 2012/12/07 12:50:37 fabiankeil Exp $";
+const char jcc_rcs[] = "$Id: jcc.c,v 1.423 2013/01/03 15:25:08 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/jcc.c,v $
@@ -3682,6 +3682,15 @@ static jb_socket bind_port_helper(const char *haddr, int hport)
       return JB_INVALID_SOCKET;
    }
 
+#ifndef _WIN32
+   if (bfd >= FD_SETSIZE)
+   {
+      log_error(LOG_LEVEL_FATAL,
+         "Bind socket number too high to use select(): %d >= %d",
+         bfd, FD_SETSIZE);
+   }
+#endif
+
    if (haddr == NULL)
    {
       log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",