net-setup: Add routing and old stack's configuration

This allows the old stack's configuration structures to be used
unchanged even though this code currently does not support all
of the options. It likely will never support all of the options
as some should eventually come through configuration files as
they would in a real FreeBSD system. Other configuration
parameters are likely configurable via "hints".

freebsd-userspace/Makefile

@@ -7,6 +7,7 @@ include $(PROJECT_ROOT)/make/leaf.cfg
 CFLAGS += -I $(INSTALL_BASE)/include
 #CFLAGS += -ffreestanding 
 CFLAGS += -I include 
+CFLAGS += -I rtems/include 
 CFLAGS += -I lib/libc/include 
 CFLAGS += -I sys
 CFLAGS += -I local 
@@ -108,6 +109,8 @@ install: $(LIB)
 	install -d $(INSTALL_BASE)/include
 	cd include; for i in `find . -name '*.h'` ; do \
 	  install -c -m 644 -D "$$i" "$(INSTALL_BASE)/include/$$i" ; done
+	cd rtems/include; for i in `find . -name '*.h'` ; do \
+	  install -c -m 644 -D "$$i" "$(INSTALL_BASE)/include/$$i" ; done
 	install -c -m 644 $(LIB) $(INSTALL_BASE)
 
 clean:

freebsd-userspace/rtems/rtems-net-setup.c

@@ -9,6 +9,8 @@
 #include <net/if.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
+#include <net/route.h>
+#include <rtems/rtems_bsdnet.h>
 
 static const struct sockaddr_in address_template = {
   sizeof(address_template),
@@ -18,6 +20,30 @@ static const struct sockaddr_in address_template = {
   { 0, 0, 0, 0, 0, 0, 0, 0 }
 };
 
+/*
+ * Manipulate routing tables
+ */
+int rtems_bsdnet_rtrequest(
+  int              req,
+  struct sockaddr *dst,
+  struct sockaddr *gateway,
+  struct sockaddr *netmask,
+  int              flags,
+  struct rtentry **net_nrt
+)
+{
+  int error;
+
+  // rtems_bsdnet_semaphore_obtain();
+  error = rtrequest(req, dst, gateway, netmask, flags, net_nrt);
+  // rtems_bsdnet_semaphore_release();
+  if (error) {
+    errno = error;
+    return -1;
+  }
+  return 0;
+}
+
 static void
 rtems_bsdnet_initialize_sockaddr_in(struct sockaddr_in *addr)
 {
@@ -235,6 +261,7 @@ static bool rtems_bsdnet_setup_interface(
 void rtems_initialize_interfaces(void)
 {
   bool                          any_if_configured;
+  struct rtems_bsdnet_ifconfig *ifp;
 
   any_if_configured = false;
 
@@ -244,7 +271,6 @@ void rtems_initialize_interfaces(void)
     "255.0.0.0"
   );
 
-#if 0
 
   for (ifp = rtems_bsdnet_config.ifconfig ; ifp ; ifp = ifp->next) {
     if (ifp->ip_address == NULL)
@@ -256,6 +282,30 @@ void rtems_initialize_interfaces(void)
       ifp->ip_netmask
     );
   }
-#endif
+  /*
+   * Set default route
+   */
+  if (rtems_bsdnet_config.gateway && any_if_configured) {
+    struct sockaddr_in address;
+    struct sockaddr_in netmask;
+    struct sockaddr_in gateway;
+
+    rtems_bsdnet_initialize_sockaddr_in(&address);
+    rtems_bsdnet_initialize_sockaddr_in(&netmask);
+    rtems_bsdnet_initialize_sockaddr_in(&gateway);
+
+    gateway.sin_addr.s_addr = inet_addr (rtems_bsdnet_config.gateway);
+
+    if (rtems_bsdnet_rtrequest (
+        RTM_ADD,
+        (struct sockaddr *)&address,
+        (struct sockaddr *)&gateway,
+        (struct sockaddr *)&netmask,
+        (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL) < 0) {
+      printf ("Can't set default route: %s\n", strerror (errno));
+      return -1;
+    }
+  }
+  return 0;
 
 }

rtemsbsd/freebsd/machine/rtems-bsd-config.h

@@ -88,7 +88,7 @@
 /* Networking */
 #define IPSEC 1
 #define INET  1
-#define INET6 1
+// #define INET6 1
 #define TCP_SIGNATURE 1
 
 /* Integer type definitions */