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.

6 files changed, 82 insertions, 24 deletions

diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 1f7b0f55..c2d1bcc7 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -8,6 +8,8 @@ find_package(ProtobufC REQUIRED)
 include_directories(${PROTOBUF_INCLUDE_DIRS})
 protobuf_generate_c(IRM_PROTO_SRCS IRM_PROTO_HDRS irmd_messages.proto)
 protobuf_generate_c(IPCP_PROTO_SRCS IPCP_PROTO_HDRS ipcpd_messages.proto)
+protobuf_generate_c(DIF_CONFIG_PROTO_SRCS DIF_CONFIG_PROTO_HDRS
+                                          dif_config.proto)
 
 find_library(LIBRT_LIBRARIES rt)
 if(NOT LIBRT_LIBRARIES)
@@ -36,11 +38,11 @@ set(SOURCE_FILES
   utils.c
   )
 
-install(FILES ${IRM_PROTO_HDRS} ${IPCP_PROTO_HDRS}
+install(FILES ${IRM_PROTO_HDRS} ${IPCP_PROTO_HDRS} ${DIF_CONFIG_PROTO_HDRS}
   DESTINATION include/ouroboros)
 
 add_library(ouroboros SHARED ${SOURCE_FILES}
-  ${IRM_PROTO_SRCS} ${IPCP_PROTO_SRCS})
+  ${IRM_PROTO_SRCS} ${IPCP_PROTO_SRCS} ${DIF_CONFIG_PROTO_SRCS})
 
 target_link_libraries(ouroboros ${LIBRT_LIBRARIES}
   ${LIBPTHREAD_LIBRARIES} ${PROTOBUF_C_LIBRARY})
diff --git a/src/lib/dif_config.proto b/src/lib/dif_config.proto
new file mode 100644
index 00000000..87cb222f
--- /dev/null
+++ b/src/lib/dif_config.proto
@@ -0,0 +1,16 @@
+message dif_config_msg {
+        required string dif_name = 1;
+        required int32 ipcp_type = 2;
+        // Config for normal IPCP
+        optional uint32 addr_size = 3;
+        optional uint32 cep_id_size = 4;
+        optional uint32 pdu_length_size = 5;
+        optional uint32 qos_id_size = 6;
+        optional uint32 seqno_size = 7;
+        optional uint32 ttl_size = 8;
+        optional uint32 chk_size = 9;
+        optional uint32 min_pdu_size = 10;
+        optional uint32 max_pdu_size = 11;
+        // Config for shim UDP
+        optional uint32 ip_addr = 12;
+}
\ No newline at end of file
diff --git a/src/lib/ipcp.c b/src/lib/ipcp.c
index d61fcb50..a0febe4e 100644
--- a/src/lib/ipcp.c
+++ b/src/lib/ipcp.c
@@ -100,7 +100,7 @@ static ipcp_msg_t * send_recv_ipcp_msg(pid_t pid,
 }
 
 pid_t ipcp_create(instance_name_t * api,
-                  char *            ipcp_type)
+                  enum ipcp_type    ipcp_type)
 {
         pid_t pid = 0;
         char * api_id = NULL;
@@ -108,11 +108,6 @@ pid_t ipcp_create(instance_name_t * api,
         char * ipcp_dir = "bin/ipcpd";
         char * full_name = NULL;
 
-        if (ipcp_type == NULL)
-                return -1;
-
-        LOG_DBG("%lu", _POSIX_C_SOURCE);
-
         pid = fork();
         if (pid == -1) {
                 LOG_ERR("Failed to fork");
@@ -146,7 +141,7 @@ pid_t ipcp_create(instance_name_t * api,
 
         char * argv[] = {full_name,
                          api->name, api_id,
-                         ipcp_type, 0};
+                         0};
 
         char * envp[] = {0};
 
@@ -241,14 +236,19 @@ int ipcp_unreg(pid_t pid,
         return ret;
 }
 
+
 int ipcp_bootstrap(pid_t pid,
-                   struct dif_config * conf)
+                   dif_config_msg_t * conf)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
+        if (conf == NULL)
+                return -EINVAL;
+
         msg.code = IPCP_MSG_CODE__IPCP_BOOTSTRAP;
+        msg.conf = conf;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
diff --git a/src/lib/ipcpd_messages.proto b/src/lib/ipcpd_messages.proto
index bcdd54ae..b83c34c7 100644
--- a/src/lib/ipcpd_messages.proto
+++ b/src/lib/ipcpd_messages.proto
@@ -1,3 +1,5 @@
+import "dif_config.proto";
+
 enum ipcp_msg_code {
         IPCP_BOOTSTRAP = 1;
         IPCP_ENROLL = 2;
@@ -14,7 +16,7 @@ enum ipcp_msg_code {
 message ipcp_msg {
         required ipcp_msg_code code = 1;
         optional string ap_name = 2;
-        // Missing dif_config field here
+        optional dif_config_msg conf = 3;
         repeated string dif_name = 4;
         optional int32 result = 5;
         optional uint32 port_id = 6;
diff --git a/src/lib/irm.c b/src/lib/irm.c
index 7c187be1..3078e158 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -31,13 +31,13 @@
 #include <stdlib.h>
 
 int irm_create_ipcp(instance_name_t * api,
-                    char *            ipcp_type)
+                    enum ipcp_type    ipcp_type)
 {
         irm_msg_t msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (api == NULL || ipcp_type == NULL || api->name == NULL)
+        if (api == NULL || api->name == NULL)
                 return -EINVAL;
 
         msg.code = IRM_MSG_CODE__IRM_CREATE_IPCP;
@@ -94,6 +94,7 @@ int irm_bootstrap_ipcp(instance_name_t   * api,
                        struct dif_config * conf)
 {
         irm_msg_t msg = IRM_MSG__INIT;
+        dif_config_msg_t config = DIF_CONFIG_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
@@ -105,9 +106,45 @@ int irm_bootstrap_ipcp(instance_name_t   * api,
         msg.has_api_id = true;
         msg.api_id = api->id;
 
+        msg.conf = &config;
+        config.dif_name = conf->dif_name;
+        config.ipcp_type = conf->type;
+
+        switch (conf->type) {
+        case NORMAL_IPCP:
+                config.has_addr_size = true;
+                config.has_cep_id_size = true;
+                config.has_pdu_length_size = true;
+                config.has_qos_id_size = true;
+                config.has_seqno_size = true;
+                config.has_ttl_size = true;
+                config.has_chk_size = true;
+                config.has_min_pdu_size = true;
+                config.has_max_pdu_size = true;
+
+                config.addr_size = conf->addr_size;
+                config.cep_id_size = conf->cep_id_size;
+                config.pdu_length_size = conf->pdu_length_size;
+                config.qos_id_size = conf->qos_id_size;
+                config.seqno_size = conf->seqno_size;
+                config.ttl_size = conf->ttl_size;
+                config.chk_size = conf->chk_size;
+                config.min_pdu_size = conf->min_pdu_size;
+                config.max_pdu_size = conf->max_pdu_size;
+                break;
+        case SHIM_UDP_IPCP:
+                config.has_ip_addr = true;
+
+                config.ip_addr = conf->ip_addr;
+                break;
+        default:
+                return -1;
+        }
+
         recv_msg = send_recv_irm_msg(&msg);
-        if (recv_msg == NULL)
+        if (recv_msg == NULL) {
                 return -1;
+        }
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
diff --git a/src/lib/irmd_messages.proto b/src/lib/irmd_messages.proto
index 44070755..3a2432f3 100644
--- a/src/lib/irmd_messages.proto
+++ b/src/lib/irmd_messages.proto
@@ -1,3 +1,5 @@
+import "dif_config.proto";
+
 enum irm_msg_code {
         IRM_CREATE_IPCP = 1;
         IRM_DESTROY_IPCP = 2;
@@ -26,14 +28,13 @@ message irm_msg {
         optional string ap_name = 2;
         optional uint32 api_id = 3;
         optional string ae_name = 4;
-        optional string ipcp_type = 5;
-        // Missing dif_config field here
-        repeated string dif_name = 7;
-        optional int32 fd = 8;
-        optional int32 result = 9;
-        // Missing qos_spec here
-        optional int32 oflags = 10;
-        optional string dst_ap_name = 11;
-        optional uint32 port_id = 12;
-        optional int32 pid = 13;
+        optional uint32 ipcp_type = 5;
+        repeated string dif_name = 6;
+        optional int32 fd = 7;
+        optional int32 result = 8;
+        optional int32 oflags = 9;
+        optional string dst_ap_name = 10;
+        optional uint32 port_id = 11;
+        optional int32 pid = 12;
+        optional dif_config_msg conf = 13;
 };