ipcpd: Configure PFF from routing policy

The Packet Forwarding Function (PFF) was user-configurable using the
irm tool. However, this isn't really wanted since the PFF is dictated
by the routing algorithm. This moves the responsability for selecting
the correct PFF from the network admin to the unicast IPCP
implementation. Each routing policy now has to specify which PFF it
will use.

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

7 files changed, 19 insertions, 9 deletions

diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index f826379d..8f9fcd7d 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -241,7 +241,6 @@ static void * mainloop(void * o)
                                 conf.max_ttl        = conf_msg->max_ttl;
                                 conf.addr_auth_type = conf_msg->addr_auth_type;
                                 conf.routing_type   = conf_msg->routing_type;
-                                conf.pff_type       = conf_msg->pff_type;
                                 break;
                         case IPCP_ETH_DIX:
                                 conf.ethertype = conf_msg->ethertype;
diff --git a/src/ipcpd/unicast/dt.c b/src/ipcpd/unicast/dt.c
index cabc159d..ee14d28e 100644
--- a/src/ipcpd/unicast/dt.c
+++ b/src/ipcpd/unicast/dt.c
@@ -621,7 +621,6 @@ static void * dt_conn_handle(void * o)
 }
 
 int dt_init(enum pol_routing pr,
-            enum pol_pff     pp,
             uint8_t          addr_size,
             uint8_t          eid_size,
             uint8_t          max_ttl)
@@ -629,6 +628,7 @@ int dt_init(enum pol_routing pr,
         int              i;
         int              j;
         char             dtstr[256];
+        enum pol_pff     pp;
         struct conn_info info;
 
         memset(&info, 0, sizeof(info));
@@ -659,7 +659,8 @@ int dt_init(enum pol_routing pr,
                 goto fail_connmgr_comp_init;
         }
 
-        if (routing_init(pr)) {
+        pp = routing_init(pr);
+        if (pp < 0) {
                 log_err("Failed to init routing.");
                 goto fail_routing;
         }
diff --git a/src/ipcpd/unicast/dt.h b/src/ipcpd/unicast/dt.h
index 15a7b660..73b71a92 100644
--- a/src/ipcpd/unicast/dt.h
+++ b/src/ipcpd/unicast/dt.h
@@ -32,7 +32,6 @@
 #define INVALID_ADDR 0
 
 int  dt_init(enum pol_routing pr,
-             enum pol_pff     pp,
              uint8_t          addr_size,
              uint8_t          eid_size,
              uint8_t          max_ttl
diff --git a/src/ipcpd/unicast/enroll.c b/src/ipcpd/unicast/enroll.c
index 582e808f..6a612ff3 100644
--- a/src/ipcpd/unicast/enroll.c
+++ b/src/ipcpd/unicast/enroll.c
@@ -136,7 +136,6 @@ static int send_rcv_enroll_msg(int fd)
         enroll.conf.max_ttl        = reply->conf->max_ttl;
         enroll.conf.addr_auth_type = reply->conf->addr_auth_type;
         enroll.conf.routing_type   = reply->conf->routing_type;
-        enroll.conf.pff_type       = reply->conf->pff_type;
         enroll.conf.layer_info.dir_hash_algo
                 = reply->conf->layer_info->dir_hash_algo;
 
@@ -173,8 +172,6 @@ static ssize_t enroll_pack(uint8_t ** buf)
         config.addr_auth_type     = enroll.conf.addr_auth_type;
         config.has_routing_type   = true;
         config.routing_type       = enroll.conf.routing_type;
-        config.has_pff_type       = true;
-        config.pff_type           = enroll.conf.pff_type;
         config.layer_info         = &layer_info;
 
         layer_info.layer_name     = (char *) enroll.conf.layer_info.layer_name;
diff --git a/src/ipcpd/unicast/main.c b/src/ipcpd/unicast/main.c
index 33295e29..43052209 100644
--- a/src/ipcpd/unicast/main.c
+++ b/src/ipcpd/unicast/main.c
@@ -82,7 +82,6 @@ static int initialize_components(const struct ipcp_config * conf)
         log_dbg("IPCP got address %" PRIu64 ".", ipcpi.dt_addr);
 
         if (dt_init(conf->routing_type,
-                    conf->pff_type,
                     conf->addr_size,
                     conf->eid_size,
                     conf->max_ttl)) {
diff --git a/src/ipcpd/unicast/pff.h b/src/ipcpd/unicast/pff.h
index d88ffa7f..a7b618dc 100644
--- a/src/ipcpd/unicast/pff.h
+++ b/src/ipcpd/unicast/pff.h
@@ -29,6 +29,11 @@
 #include <stdlib.h>
 #include <stdbool.h>
 
+enum pol_pff {
+        PFF_SIMPLE = 0,
+        PFF_ALTERNATE
+};
+
 struct pff * pff_create(enum pol_pff pol);
 
 void         pff_destroy(struct pff * pff);
diff --git a/src/ipcpd/unicast/routing.c b/src/ipcpd/unicast/routing.c
index 1d660cde..0794555e 100644
--- a/src/ipcpd/unicast/routing.c
+++ b/src/ipcpd/unicast/routing.c
@@ -24,6 +24,7 @@
 
 #include <ouroboros/errno.h>
 
+#include "pff.h"
 #include "routing.h"
 #include "pol/link_state.h"
 
@@ -31,16 +32,25 @@ struct pol_routing_ops * r_ops;
 
 int routing_init(enum pol_routing pr)
 {
+        enum pol_pff pff_type;
+
         switch (pr) {
         case ROUTING_LINK_STATE:
+                pff_type = PFF_SIMPLE;
+                r_ops = &link_state_ops;
+                break;
         case ROUTING_LINK_STATE_LFA:
+                pff_type = PFF_ALTERNATE;
                 r_ops = &link_state_ops;
                 break;
         default:
                 return -ENOTSUP;
         }
 
-        return r_ops->init(pr);
+        if (r_ops->init(pr))
+                return -1;
+
+        return pff_type;
 }
 
 struct routing_i * routing_i_create(struct pff * pff)