lib, irmd, irm: Add dif_config

This adds dif_config to the prototype, in which one is able to specify
the parameters a DIF should have. The bootstrap operation of an IPCP
takes this as parameter and is oblivious to whether it is a shim or a
normal IPCP. The dif_config struct is also correctly serialized and
deserialized and passed opaquely to the correct IPCP. This IPCP is in
charge of deserializing it correctly.

7 files changed, 81 insertions, 32 deletions

diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt
index 0b52a2bc..fb4884b7 100644
--- a/include/ouroboros/CMakeLists.txt
+++ b/include/ouroboros/CMakeLists.txt
@@ -8,6 +8,7 @@ set(HEADER_FILES
         common.h
         da.h
         dev.h
+        dif_config.h
         du_buff.h
         flow.h
         instance_name.h
diff --git a/include/ouroboros/common.h b/include/ouroboros/common.h
index 658c3618..971a382a 100644
--- a/include/ouroboros/common.h
+++ b/include/ouroboros/common.h
@@ -42,28 +42,4 @@ struct qos_spec {
         uint32_t jitter;
 };
 
-/* FIXME: What should be configurable in the DIF? */
-struct dif_config {
-        /* general data */
-        char * dif_name;
-
-        /* TODO: efficient policies */
-
-        /* dt field sizes in octets */
-        uint8_t addr_size;
-        uint8_t cep_id_size;
-        uint8_t pdu_length_size;
-        uint8_t qos_id_size;
-        uint8_t seqno_size;
-
-        /* constants for dup */
-        uint8_t ttl_size;
-        uint8_t chk_size;
-
-        /* values, octets */
-        uint32_t min_pdu_size;
-        uint32_t max_pdu_size;
-
-};
-
 #endif /* OUROBOROS_COMMON_H */
diff --git a/include/ouroboros/dif_config.h b/include/ouroboros/dif_config.h
new file mode 100644
index 00000000..5443085e
--- /dev/null
+++ b/include/ouroboros/dif_config.h
@@ -0,0 +1,61 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * DIF configurations for each IPCP type
+ *
+ *    Sander Vrijders <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/utils.h>
+
+#ifndef OUROBOROS_DIF_CONFIG_H
+#define OUROBOROS_DIF_CONFIG_H
+
+enum ipcp_type {
+        NORMAL_IPCP = 1,
+        SHIM_UDP_IPCP
+};
+
+struct dif_config {
+        char * dif_name;
+        enum ipcp_type type;
+
+        union {
+                /* Normal DIF */
+                struct {
+                        uint8_t addr_size;
+                        uint8_t cep_id_size;
+                        uint8_t pdu_length_size;
+                        uint8_t qos_id_size;
+                        uint8_t seqno_size;
+
+                        /* DUP constants */
+                        uint8_t ttl_size;
+                        uint8_t chk_size;
+
+                        uint32_t min_pdu_size;
+                        uint32_t max_pdu_size;
+                };
+                /* Shim UDP */
+                struct {
+                        uint32_t ip_addr;
+                };
+        };
+};
+
+
+#endif /* OUROBOROS_DIF_CONFIG_H */
diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index fdaf5c4a..3198a882 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -24,7 +24,9 @@
 #define OUROBOROS_IPCP_H
 
 #include <ouroboros/common.h>
+#include <ouroboros/dif_config.h>
 #include <ouroboros/instance_name.h>
+#include <ouroboros/sockets.h>
 
 #include <sys/types.h>
 
@@ -32,7 +34,8 @@ struct ipcp;
 
 /* Returns the process id */
 pid_t ipcp_create(instance_name_t * api,
-                  char *            ipcp_type);
+                  enum ipcp_type    ipcp_type);
+
 int   ipcp_destroy(pid_t pid);
 
 int   ipcp_reg(pid_t   pid,
@@ -42,12 +45,13 @@ int   ipcp_unreg(pid_t   pid,
                  char ** difs,
                  size_t  difs_size);
 
-int   ipcp_bootstrap(pid_t               pid,
-                     struct dif_config * conf);
 int   ipcp_enroll(pid_t  pid,
                   char * member_name,
                   char * n_1_dif);
 
+int   ipcp_bootstrap(pid_t pid,
+                     dif_config_msg_t * conf);
+
 /* Flow related ops, these go from IRMd to IPCP */
 
 int   ipcp_ap_reg(pid_t    pid,
diff --git a/include/ouroboros/irm.h b/include/ouroboros/irm.h
index 780bf77b..24bb2c42 100644
--- a/include/ouroboros/irm.h
+++ b/include/ouroboros/irm.h
@@ -23,18 +23,20 @@
 #ifndef OUROBOROS_IRM_H
 #define OUROBOROS_IRM_H
 
-#include "common.h"
-#include "instance_name.h"
+#include <ouroboros/instance_name.h>
+#include <ouroboros/dif_config.h>
 
 int irm_create_ipcp(instance_name_t * api,
-                    char *            ipcp_type);
+                    enum ipcp_type    ipcp_type);
+
 int irm_destroy_ipcp(instance_name_t * api);
 
-int irm_bootstrap_ipcp(instance_name_t *   api,
-                       struct dif_config * conf);
 int irm_enroll_ipcp(instance_name_t * api,
                     char *            dif_name);
 
+int irm_bootstrap_ipcp(instance_name_t *   api,
+                       struct dif_config * conf);
+
 int irm_reg_ipcp(instance_name_t * api,
                  char **           difs,
                  size_t            difs_size);
diff --git a/include/ouroboros/sockets.h b/include/ouroboros/sockets.h
index 0c517bd4..be5ae651 100644
--- a/include/ouroboros/sockets.h
+++ b/include/ouroboros/sockets.h
@@ -27,6 +27,9 @@
 
 #include <sys/types.h>
 
+#include "dif_config.pb-c.h"
+typedef DifConfigMsg dif_config_msg_t;
+
 #include "irmd_messages.pb-c.h"
 typedef IrmMsg irm_msg_t;
 
diff --git a/include/ouroboros/utils.h b/include/ouroboros/utils.h
index 2eaccae9..2e5a4944 100644
--- a/include/ouroboros/utils.h
+++ b/include/ouroboros/utils.h
@@ -20,6 +20,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#define MAX(a,b) (a > b ? a : b)
+
 /*
  * Returns the number of characters a uint would
  * need when represented as a string