ipcpd: normal: Make PFF policy-based

This turns the PDU Forwarding Function of the IPCP into a policy. For
now only the simple PFF policy is available.

5 files changed, 249 insertions, 6 deletions

diff --git a/src/ipcpd/normal/pol/flat.c b/src/ipcpd/normal/pol/flat.c
index 0c4648c5..c52ebe38 100644
--- a/src/ipcpd/normal/pol/flat.c
+++ b/src/ipcpd/normal/pol/flat.c
@@ -30,6 +30,7 @@
 #include <ouroboros/utils.h>
 
 #include "ipcp.h"
+#include "flat.h"
 
 #include <time.h>
 #include <stdlib.h>
@@ -46,6 +47,12 @@ struct {
 
 #define INVALID_ADDRESS 0
 
+struct pol_addr_auth_ops flat_ops = {
+        .init    = flat_init,
+        .fini    = flat_fini,
+        .address = flat_address
+};
+
 int flat_init(const void * info)
 {
         flat.addr_size = *((uint8_t *) info);
diff --git a/src/ipcpd/normal/pol/flat.h b/src/ipcpd/normal/pol/flat.h
index 57af591e..fdd06d68 100644
--- a/src/ipcpd/normal/pol/flat.h
+++ b/src/ipcpd/normal/pol/flat.h
@@ -31,10 +31,6 @@ int      flat_fini(void);
 
 uint64_t flat_address(void);
 
-struct pol_addr_auth_ops flat_ops = {
-        .init    = flat_init,
-        .fini    = flat_fini,
-        .address = flat_address
-};
+struct pol_addr_auth_ops flat_ops;
 
 #endif /* OUROBOROS_IPCPD_NORMAL_FLAT_H */
diff --git a/src/ipcpd/normal/pol/link_state.c b/src/ipcpd/normal/pol/link_state.c
index 2823f28e..26370682 100644
--- a/src/ipcpd/normal/pol/link_state.c
+++ b/src/ipcpd/normal/pol/link_state.c
@@ -404,7 +404,7 @@ static void * calculate_pff(void * o)
                         if (fd == -1)
                                 continue;
 
-                        pff_add(instance->pff, table[i]->dst, fd);
+                        pff_add(instance->pff, table[i]->dst, &fd, 1);
                 }
 
                 pff_unlock(instance->pff);
diff --git a/src/ipcpd/normal/pol/simple_pff.c b/src/ipcpd/normal/pol/simple_pff.c
new file mode 100644
index 00000000..28f7aa2e
--- /dev/null
+++ b/src/ipcpd/normal/pol/simple_pff.c
@@ -0,0 +1,183 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Simple PDU Forwarding Function
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., http://www.fsf.org/about/contact/.
+ */
+
+#define _POSIX_C_SOURCE 200112L
+
+#include "config.h"
+
+#include <ouroboros/hashtable.h>
+#include <ouroboros/errno.h>
+
+#include <assert.h>
+#include <pthread.h>
+
+#include "simple_pff.h"
+
+struct pff_i {
+        struct htable *  table;
+        pthread_rwlock_t lock;
+};
+
+struct pol_pff_ops simple_pff_ops = {
+        .create            = simple_pff_create,
+        .destroy           = simple_pff_destroy,
+        .lock              = simple_pff_lock,
+        .unlock            = simple_pff_unlock,
+        .add               = simple_pff_add,
+        .update            = simple_pff_update,
+        .del               = simple_pff_del,
+        .flush             = simple_pff_flush,
+        .nhop              = simple_pff_nhop,
+        .flow_state_change = NULL
+};
+
+struct pff_i * simple_pff_create(void)
+{
+        struct pff_i * tmp;
+
+        tmp = malloc(sizeof(*tmp));
+        if (tmp == NULL)
+                return NULL;
+
+        if (pthread_rwlock_init(&tmp->lock, NULL)) {
+                free(tmp);
+                return NULL;
+        }
+
+        tmp->table = htable_create(PFT_SIZE, false);
+        if (tmp->table == NULL) {
+                pthread_rwlock_destroy(&tmp->lock);
+                free(tmp);
+                return NULL;
+        }
+
+        return tmp;
+}
+
+void simple_pff_destroy(struct pff_i * pff_i)
+{
+        assert(pff_i);
+
+        htable_destroy(pff_i->table);
+
+        pthread_rwlock_destroy(&pff_i->lock);
+        free(pff_i);
+}
+
+void simple_pff_lock(struct pff_i * pff_i)
+{
+        pthread_rwlock_wrlock(&pff_i->lock);
+}
+
+void simple_pff_unlock(struct pff_i * pff_i)
+{
+        pthread_rwlock_unlock(&pff_i->lock);
+}
+
+int simple_pff_add(struct pff_i * pff_i,
+                   uint64_t       addr,
+                   int *          fd,
+                   size_t         len)
+{
+        int * val;
+
+        assert(pff_i);
+        assert(len > 0);
+
+        val = malloc(sizeof(*val));
+        if (val == NULL)
+                return -ENOMEM;
+
+        *val = fd[0];
+
+        if (htable_insert(pff_i->table, addr, val)) {
+                free(val);
+                return -1;
+        }
+
+        return 0;
+}
+
+int simple_pff_update(struct pff_i * pff_i,
+                      uint64_t       addr,
+                      int *          fd,
+                      size_t         len)
+{
+        int * val;
+
+        assert(pff_i);
+        assert(len > 0);
+
+        val = malloc(sizeof(*val));
+        if (val == NULL)
+                return -ENOMEM;
+        *val = fd[0];
+
+        if (htable_delete(pff_i->table, addr)) {
+                free(val);
+                return -1;
+        }
+
+        if (htable_insert(pff_i->table, addr, val)) {
+                free(val);
+                return -1;
+        }
+
+        return 0;
+}
+
+int simple_pff_del(struct pff_i * pff_i,
+                   uint64_t       addr)
+{
+        assert(pff_i);
+
+        if (htable_delete(pff_i->table, addr))
+                return -1;
+
+        return 0;
+}
+
+void simple_pff_flush(struct pff_i * pff_i)
+{
+        assert(pff_i);
+
+        htable_flush(pff_i->table);
+}
+
+int simple_pff_nhop(struct pff_i * pff_i,
+                    uint64_t       addr)
+{
+        int * j;
+        int   fd = -1;
+
+        assert(pff_i);
+
+        pthread_rwlock_rdlock(&pff_i->lock);
+
+        j = (int *) htable_lookup(pff_i->table, addr);
+        if (j != NULL)
+                fd = *j;
+
+        pthread_rwlock_unlock(&pff_i->lock);
+
+        return fd;
+}
diff --git a/src/ipcpd/normal/pol/simple_pff.h b/src/ipcpd/normal/pol/simple_pff.h
new file mode 100644
index 00000000..ef34dfee
--- /dev/null
+++ b/src/ipcpd/normal/pol/simple_pff.h
@@ -0,0 +1,57 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Simple policy for PFF
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., http://www.fsf.org/about/contact/.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_SIMPLE_PFF_H
+#define OUROBOROS_IPCPD_NORMAL_SIMPLE_PFF_H
+
+#include "pol-pff-ops.h"
+
+struct pff_i * simple_pff_create(void);
+
+void           simple_pff_destroy(struct pff_i * pff_i);
+
+void           simple_pff_lock(struct pff_i * pff_i);
+
+void           simple_pff_unlock(struct pff_i * pff_i);
+
+int            simple_pff_add(struct pff_i * pff_i,
+                              uint64_t       addr,
+                              int *          fd,
+                              size_t         len);
+
+int            simple_pff_update(struct pff_i * pff_i,
+                                 uint64_t       addr,
+                                 int *          fd,
+                                 size_t         len);
+
+int            simple_pff_del(struct pff_i * pff_i,
+                              uint64_t       addr);
+
+void           simple_pff_flush(struct pff_i * pff_i);
+
+/* Returns fd towards next hop */
+int            simple_pff_nhop(struct pff_i * pff_i,
+                               uint64_t       addr);
+
+struct pol_pff_ops simple_pff_ops;
+
+#endif /* OUROBOROS_IPCPD_NORMAL_SIMPLE_PFF_H */