Add ability to get routes from multiple kernel tables.

babeld.c

@@ -226,8 +226,7 @@ main(int argc, char **argv)
                 goto usage;
             break;
         case 'T':
-            import_table = parse_nat(optarg);
-            if(import_table < 0 || import_table > 0xFFFF)
+            if(add_import_table(parse_nat(optarg)))
                 goto usage;
             break;
         case 'c':

babeld.man

@@ -115,7 +115,9 @@ Use the given kernel routing table for routes inserted by
 .BR babeld .
 .TP
 .BI \-T " table"
-Export routes from the given kernel routing table.
+Export routes from the given kernel routing table. This can be
+specified multiple times in order to export routes from more than one
+table.
 .TP
 .BI \-c " filename"
 Specify the name of the configuration file.  The default is

kernel.c

@@ -98,3 +98,11 @@ read_random_bytes(void *buf, size_t len)
     return rc;
 }
 
+int
+add_import_table(int table)
+{
+    if(table < 0 || table > 0xFFFF) return -1;
+    if(import_table_count > MAX_IMPORT_TABLES - 1) return -2;
+    import_tables[import_table_count++] = table;
+    return 0;
+}

kernel.h

@@ -42,7 +42,13 @@ struct kernel_route {
 #define CHANGE_ROUTE (1 << 1)
 #define CHANGE_ADDR  (1 << 2)
 
-extern int export_table, import_table;
+#ifndef MAX_IMPORT_TABLES
+#define MAX_IMPORT_TABLES 10
+#endif
+
+extern int export_table, import_tables[MAX_IMPORT_TABLES], import_table_count;
+
+int add_import_table(int table);
 
 int kernel_setup(int setup);
 int kernel_setup_socket(int setup);

kernel_netlink.c

@@ -51,7 +51,7 @@ THE SOFTWARE.
 #include "util.h"
 #include "interface.h"
 
-int export_table = -1, import_table = -1;
+int export_table = -1, import_tables[MAX_IMPORT_TABLES], import_table_count = 0;
 
 static int old_forwarding = -1;
 static int old_ipv4_forwarding = -1;
@@ -468,8 +468,8 @@ kernel_setup(int setup)
         if(export_table < 0)
             export_table = RT_TABLE_MAIN;
 
-        if(import_table < 0)
-            import_table = RT_TABLE_MAIN;
+        if(import_table_count < 1)
+            import_tables[import_table_count++] = RT_TABLE_MAIN;
 
         dgram_socket = socket(PF_INET, SOCK_DGRAM, 0);
         if(dgram_socket < 0)
@@ -1037,10 +1037,11 @@ parse_kernel_route_rta(struct rtmsg *rtm, int len, struct kernel_route *route)
     }
 #undef COPY_ADDR
 
-    if(table != import_table)
-        return -1;
-
+    int i;
+    for(i = 0; i < import_table_count; i++)
+        if(table == import_tables[i])
             return 0;
+    return -1;
 }
 
 static void

kernel_socket.c

@@ -57,7 +57,7 @@ static int get_sdl(struct sockaddr_dl *sdl, char *ifname);
 static const unsigned char v4prefix[16] =
     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 };
 
-int export_table = -1, import_table = -1;
+int export_table = -1, import_table_count = 0, import_tables[MAX_IMPORT_TABLES];
 
 int
 if_eui64(char *ifname, int ifindex, unsigned char *eui)
@@ -835,6 +835,8 @@ kernel_callback(int (*fn)(int, void*), void *closure)
 
 }
 
+int add_import_table(int table) { return 0; } // not used
+
 /* Local Variables:      */
 /* c-basic-offset: 4     */
 /* indent-tabs-mode: nil */