ISIS: T3156: Adding segment routing for ISIS

In this commit we add the segment routing portion for ISIS.
There's also an additional check that is added so that the
global block label ranges are properly configured. Also
added traffic engineering configurations as well.

1 files changed, 31 insertions, 2 deletions

diff --git a/src/conf_mode/protocols_isis.py b/src/conf_mode/protocols_isis.py
index 97ab79583..b7afad473 100755
--- a/src/conf_mode/protocols_isis.py
+++ b/src/conf_mode/protocols_isis.py
@@ -22,6 +22,7 @@ from vyos.config import Config
 from vyos.configdict import node_changed
 from vyos import ConfigError
 from vyos.util import call
+from vyos.util import dict_search
 from vyos.template import render
 from vyos.template import render_to_string
 from vyos import frr
@@ -48,7 +49,7 @@ def verify(isis):
         # If more then one isis process is defined (Frr only supports one)
         # http://docs.frrouting.org/en/latest/isisd.html#isis-router
         if len(isis) > 1:
-            raise ConfigError('Only one isis process can be definded')
+            raise ConfigError('Only one isis process can be defined')
 
         # If network entity title (net) not defined
         if 'net' not in isis_config:
@@ -63,7 +64,7 @@ def verify(isis):
             if {'md5', 'plaintext_password'} <= set(isis_config['encryption']):
                 raise ConfigError('Can not use both md5 and plaintext-password for ISIS area-password!')
 
-        # If one param from deley set, but not set others
+        # If one param from delay set, but not set others
         if 'spf_delay_ietf' in isis_config:
             required_timers = ['holddown', 'init_delay', 'long_delay', 'short_delay', 'time_to_learn']
             exist_timers = []
@@ -85,6 +86,34 @@ def verify(isis):
                 if proc_level and proc_level != 'level_1_2' and proc_level != redistribute_level:
                     raise ConfigError('\"protocols isis {0} redistribute ipv4 {2} {3}\" cannot be used with \"protocols isis {0} level {1}\"'.format(process, proc_level, proto, redistribute_level))
 
+        # Segment routing checks
+        if dict_search('segment_routing', isis_config):
+            if dict_search('segment_routing.global_block', isis_config):
+                high_label_value = dict_search('segment_routing.global_block.high_label_value', isis_config)
+                low_label_value = dict_search('segment_routing.global_block.low_label_value', isis_config)
+                # If segment routing global block high value is blank, throw error
+                if low_label_value and not high_label_value:
+                    raise ConfigError('Segment routing global block high value must not be left blank')
+                # If segment routing global block low value is blank, throw error
+                if high_label_value and not low_label_value:
+                    raise ConfigError('Segment routing global block low value must not be left blank')
+                # If segment routing global block low value is higher than the high value, throw error
+                if int(low_label_value) > int(high_label_value):
+                    raise ConfigError('Segment routing global block low value must be lower than high value')
+                
+            if dict_search('segment_routing.local_block', isis_config):
+                high_label_value = dict_search('segment_routing.local_block.high_label_value', isis_config)
+                low_label_value = dict_search('segment_routing.local_block.low_label_value', isis_config)
+                # If segment routing local block high value is blank, throw error
+                if low_label_value and not high_label_value:
+                    raise ConfigError('Segment routing local block high value must not be left blank')
+                # If segment routing local block low value is blank, throw error
+                if high_label_value and not low_label_value:
+                    raise ConfigError('Segment routing local block low value must not be left blank')
+                # If segment routing local block low value is higher than the high value, throw error
+                if int(low_label_value) > int(high_label_value):
+                    raise ConfigError('Segment routing local block low value must be lower than high value')
+
     return None
 
 def generate(isis):