From 5cdaf24f9368f49f32547a6852b46dd2bfec4c21 Mon Sep 17 00:00:00 2001
From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
Date: Tue, 24 Nov 2020 16:14:54 -0600
Subject: ifupdown-ng NMSA: Add *UNTESTED* SLAAC logic

---
 ncserver/module/nms_ifupdownng.py | 94 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)

diff --git a/ncserver/module/nms_ifupdownng.py b/ncserver/module/nms_ifupdownng.py
index 268a1fa..ab6a4c3 100644
--- a/ncserver/module/nms_ifupdownng.py
+++ b/ncserver/module/nms_ifupdownng.py
@@ -230,6 +230,8 @@ _SYSCTL_MAPPING = {
     'ipv6_forwarding': 'net.ipv6.conf.{_if}.forwarding',
     'ipv6_mtu': 'net.ipv6.conf.{_if}.mtu',
     'ipv6_dad_xmit': 'net.ipv6.conf.{_if}.dad_transmits',
+    'ipv6_slaac_enabled': 'net.ipv6.conf.{_if}.autoconf',
+    'ipv6_slaac_type': 'net.ipv6.conf.{_if}.use_tempaddr',
     'ipv6_slaac_validlft': 'net.ipv6.conf.{_if}.temp_valid_lft',
     'ipv6_slaac_preflft': 'net.ipv6.conf.{_if}.temp_prefered_lft'
 }
@@ -273,6 +275,18 @@ def get_ipv6en(iface: str, parameter: str):
     return not get_sysctl_bool(iface, parameter)
 
 
+def get_slaac(iface: str, parameter: str):
+    """Retrieve SLAAC configuration for the specified interface."""
+    enabled = get_sysctl_bool(iface, 'ipv6_slaac_enabled')
+    if not enabled:
+        return False
+
+    value = get_sysctl_int(iface, 'ipv6_slaac_type')
+    if parameter == 'ipv6_slaac_globaladdr':
+        return value in ('0', '1')
+    return value in ('1', '2')
+
+
 def live_sysctl(iface: str, parameter: str):
     """Retrieve the live value of a parameter from /proc/sys."""
     key = _SYSCTL_MAPPING[parameter].format(_if=iface)
@@ -332,6 +346,18 @@ def live_ipv4_mtu(iface: str, _):
     return 1500
 
 
+def live_slaac(iface: str, parameter: str):
+    """Determine live SLAAC configuration for the specified interface."""
+    enabled = live_sysctl_bool(iface, 'ipv6_slaac_enabled')
+    if not enabled:
+        return False
+
+    value = live_sysctl_int(iface, 'ipv6_slaac_type')
+    if parameter == 'ipv6_slaac_globaladdr':
+        return value in ('0', '1')
+    return value in ('1', '2')
+
+
 # # # # Setters # # # #
 
 def set_sysctl(iface: str, parameter: str, value):
@@ -375,6 +401,48 @@ def set_ipv4_mtu(iface: str, _, value: int):
     _replace_one(iface, 'mtu', str(value))
 
 
+def set_slaac(iface: str, parameter: str, value: bool):
+    """Set SLAAC parameters for the specified interface."""
+    curr_global = get_slaac(iface, 'ipv6_slaac_globaladdr')
+    curr_temp = get_slaac(iface, 'ipv6_slaac_tempaddr')
+
+    if parameter == 'ipv6_slaac_globaladdr':
+        if not value and not curr_temp:
+            set_sysctl_bool(iface, 'ipv6_slaac_enabled', False)
+            set_sysctl_int(iface, 'ipv6_slaac_type', '0')
+            return
+        # all further types enable SLAAC in some way.
+        set_sysctl_bool(iface, 'ipv6_slaac_enabled', True)
+        if not value and curr_temp:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '2')
+            return
+        if value and not curr_temp:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '0')
+            return
+        if value and curr_temp:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '1')
+            return
+
+    if parameter == 'ipv6_slaac_tempaddr':
+        if not value and not curr_global:
+            set_sysctl_bool(iface, 'ipv6_slaac_enabled', False)
+            set_sysctl_int(iface, 'ipv6_slaac_type', '0')
+            return
+        # all further types enable SLAAC in some way.
+        set_sysctl_bool(iface, 'ipv6_slaac_enabled', True)
+        if not value and curr_global:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '0')
+            return
+        if value and not curr_global:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '2')
+            return
+        if value and curr_global:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '1')
+            return
+
+    LOGGER.error(_("unknown SLAAC parameter %s"), parameter)
+
+
 # # # # Unsetters # # # #
 
 def unset_one_eni(iface: str, parameter: str):
@@ -389,6 +457,30 @@ def unset_sysctl(iface: str, parameter: str):
     _sysctl_save()
 
 
+def unset_slaac(iface: str, parameter: str):
+    """Set SLAAC parameters for the specified interface."""
+    curr_global = get_slaac(iface, 'ipv6_slaac_globaladdr')
+    curr_temp = get_slaac(iface, 'ipv6_slaac_tempaddr')
+
+    if parameter == 'ipv6_slaac_globaladdr':
+        # unset => default true
+        set_sysctl_bool(iface, 'ipv6_slaac_enabled', True)
+        if curr_temp:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '1')
+        else:
+            set_sysctl_int(iface, 'ipv6_slaac_type', '0')
+        return
+
+    if parameter == 'ipv6_slaac_tempaddr':
+        # unset => default false
+        set_sysctl_int(iface, 'ipv6_slaac_type', '0')
+        if not curr_global:
+            set_sysctl_bool(iface, 'ipv6_slaac_enabled', False)
+        return
+
+    LOGGER.error(_("unknown SLAAC parameter %s"), parameter)
+
+
 _PARAMETERS = {
     # "name": (getter, live getter, setter, unsetter)
     'description':         (get_one_eni, get_one_eni, set_desc, unset_one_eni),
@@ -406,6 +498,8 @@ _PARAMETERS = {
                             set_sysctl_int, unset_sysctl),
     'ipv6_dad_xmit':       (get_sysctl_int, live_sysctl_int,
                             set_sysctl_int, unset_sysctl),
+    'ipv6_slaac_globaladdr': (get_slaac, live_slaac, set_slaac, unset_slaac),
+    'ipv6_slaac_tempaddr': (get_slaac, live_slaac, set_slaac, unset_slaac),
     'ipv6_slaac_validlft': (get_sysctl_int, live_sysctl_int,
                             set_sysctl_int, unset_sysctl),
     'ipv6_slaac_preflft':  (get_sysctl_int, live_sysctl_int,
-- 
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