irmd: Add configuration file support

This adds initial support for configuration files using the C99 TOML
parser (to be installed separately from https://github.com/cktan/tomlc99).

The default location for the IRMd configuration file is
/etc/ouroboros/irmd.conf. This is configurable at build time.
An example file will be installed in the configuration directory with
the name irmd.conf.example.

Config file support can be disabled using the DISABLE_CONFIGFILE build
option.

There were some refactors and changes to the configuration messages
and protobuf files. This works towards consolidation of protobuf C as
an option for more generic handling of serialization/deserialization
of various messages.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 67 insertions, 5 deletions

diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index 49deeffd..c4d596b2 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -28,6 +28,11 @@
 #include <stdbool.h>
 
 #define LAYER_NAME_SIZE 255
+#define DEV_NAME_SIZE   255
+
+/* Unicast IPCP components. */
+#define DT_COMP   "Data Transfer"
+#define MGMT_COMP "Management"
 
 /* NOTE: The IRMd uses this order to select an IPCP for flow allocation. */
 enum ipcp_type {
@@ -42,25 +47,29 @@ enum ipcp_type {
 
 /* Unicast IPCP policies */
 enum pol_addr_auth {
-        ADDR_AUTH_FLAT_RANDOM = 0
+        ADDR_AUTH_FLAT_RANDOM = 0,
+        ADDR_AUTH_INVALID
 };
 
 enum pol_routing {
         ROUTING_LINK_STATE = 0,
         ROUTING_LINK_STATE_LFA,
-        ROUTING_LINK_STATE_ECMP
+        ROUTING_LINK_STATE_ECMP,
+        ROUTING_INVALID
 };
 
 enum pol_cong_avoid {
         CA_NONE = 0,
-        CA_MB_ECN
+        CA_MB_ECN,
+        CA_INVALID
 };
 
 enum pol_dir_hash {
         DIR_HASH_SHA3_224,
         DIR_HASH_SHA3_256,
         DIR_HASH_SHA3_384,
-        DIR_HASH_SHA3_512
+        DIR_HASH_SHA3_512,
+        DIR_HASH_INVALID
 };
 
 struct dt_config {
@@ -78,7 +87,7 @@ struct uni_config {
 };
 
 struct eth_config {
-        char *   dev;
+        char     dev[DEV_NAME_SIZE + 1];
         uint16_t ethertype; /* DIX only*/
 };
 
@@ -106,4 +115,57 @@ struct ipcp_config {
         };
 };
 
+/* default configurations */
+static const struct ipcp_config local_default_conf = {
+        .type = IPCP_LOCAL,
+        .layer_info = {
+                .dir_hash_algo = DIR_HASH_SHA3_256
+        }
+};
+
+static const struct ipcp_config eth_dix_default_conf = {
+        .type = IPCP_ETH_DIX,
+        .layer_info = {
+                .dir_hash_algo = DIR_HASH_SHA3_256
+        },
+        .eth = {
+             .ethertype=0xA000,
+        }
+};
+
+static const struct ipcp_config eth_llc_default_conf = {
+        .type = IPCP_ETH_LLC,
+        .layer_info = {
+                .dir_hash_algo = DIR_HASH_SHA3_256
+        }
+};
+
+static const struct ipcp_config udp_default_conf = {
+        .type = IPCP_UDP,
+        .udp = {
+                .port = 3435
+        }
+};
+
+static const struct ipcp_config uni_default_conf = {
+        .type = IPCP_UNICAST,
+        .layer_info = {
+                .dir_hash_algo = DIR_HASH_SHA3_256
+        },
+        .unicast = {
+                .dt = {
+                        .addr_size    = 4,
+                        .eid_size     = 8,
+                        .max_ttl      = 6,
+                        .routing_type = ROUTING_LINK_STATE
+                },
+                .addr_auth_type = ADDR_AUTH_FLAT_RANDOM,
+                .cong_avoid     = CA_MB_ECN
+        }
+};
+
+static const struct ipcp_config bc_default_conf = {
+        .type = IPCP_BROADCAST
+};
+
 #endif /* OUROBOROS_IPCP_H */