From 65f0c6bf68f4f903d8011d0083385aa0f3c280ce Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Thu, 19 Mar 2020 20:04:53 +0100
Subject: wwan: T1988: support interface disable

---
 src/conf_mode/interfaces-wirelessmodem.py | 45 ++++++++++++++++++++++++++-----
 1 file changed, 38 insertions(+), 7 deletions(-)

(limited to 'src/conf_mode')

diff --git a/src/conf_mode/interfaces-wirelessmodem.py b/src/conf_mode/interfaces-wirelessmodem.py
index 93f60d038..adb8bdc2d 100755
--- a/src/conf_mode/interfaces-wirelessmodem.py
+++ b/src/conf_mode/interfaces-wirelessmodem.py
@@ -36,6 +36,8 @@ config_wwan_tmpl = """### Autogenerated by interfaces-wirelessmodem.py ###
 /dev/{{ device }}
 
 ipparam {{ intf }} {{ metric }}
+ifname {{ intf }}
+linkname {{ intf }}
 {% if on_demand -%}
 demand
 {%- endif %}
@@ -43,7 +45,7 @@ demand
 usepeerdns
 {%- endif %}
 logfile {{ logfile }}
-linkname {{ intf }}
+
 lcp-echo-failure 0
 115200
 debug
@@ -56,11 +58,24 @@ crtscts
 lock
 persist
 
+connect '/usr/sbin/chat -v -t6 -f /etc/ppp/peers/{{ intf }}.chat'
+
+"""
+
+# Please be careful if you edit the template.
+chat_wwan_tmpl = """
+ABORT 'NO DIAL TONE' ABORT 'NO ANSWER' ABORT 'NO CARRIER' ABORT DELAYED
+'' AT
+OK ATZ
+OK 'AT+CGDCONT=1,"IP","{{ apn }}"'
+OK ATD*99#
+CONNECT ''
 
 """
 
 default_config_data = {
     'address': [],
+    'apn': '',
     'deleted': False,
     'description': '',
     'device': 'ttyUSB0',
@@ -71,7 +86,6 @@ default_config_data = {
     'metric': '10',
     'mtu': '1500',
     'name_server': True,
-    'network': 'att',
     'intf': ''
 }
 
@@ -105,6 +119,10 @@ def get_config():
     # set new configuration level
     conf.set_level('interfaces wirelessmodem ' + wwan['intf'])
 
+    # get metrick for backup default route
+    if conf.exists(['apn']):
+        wwan['apn'] = conf.return_value(['apn'])
+
     # get metrick for backup default route
     if conf.exists(['backup', 'distance']):
         wwan['metric'] = conf.return_value(['backup', 'distance'])
@@ -117,6 +135,10 @@ def get_config():
     if conf.exists(['device']):
         wwan['device'] = conf.return_value(['device'])
 
+    # disable interface
+    if conf.exists('disable'):
+        wwan['disable'] = True
+
     # ignore link state changes
     if conf.exists('disable-link-detect'):
         wwan['disable_link_detect'] = 2
@@ -126,11 +148,7 @@ def get_config():
         wwan['mtu'] = conf.return_value(['mtu'])
 
     # Do not use DNS servers provided by the peer
-    if conf.exists(['network']):
-        wwan['network'] = conf.return_value(['network'])
-
-    # Do not use DNS servers provided by the peer
-    if conf.exists(['no-dns']):
+    if conf.exists(['no-peer-dns']):
         wwan['name_server'] = False
 
     # Access concentrator name (only connect to this concentrator)
@@ -143,6 +161,9 @@ def verify(wwan):
     if wwan['deleted']:
         return None
 
+    if not wwan['apn']:
+        raise ConfigError(f"APN for {wwan['intf']} not configured")
+
     # we can not use isfile() here as Linux device files are no regular files
     # thus the check will return False
     if not os.path.exists(f"/dev/{wwan['device']}"):
@@ -152,6 +173,7 @@ def verify(wwan):
 
 def generate(wwan):
     config_file_wwan = f"/etc/ppp/peers/{wwan['intf']}"
+    chat_file_wwan = f"/etc/ppp/peers/{wwan['intf']}.chat"
 
     # Always hang-up WWAN connection prior generating new configuration file
     cmd = f"systemctl stop ppp@{wwan['intf']}.service"
@@ -161,6 +183,8 @@ def generate(wwan):
         # Delete PPP configuration files
         if os.path.exists(config_file_wwan):
             os.unlink(config_file_wwan)
+        if os.path.exists(chat_file_wwan):
+            os.unlink(chat_file_wwan)
 
     else:
         # Create PPP configuration files
@@ -169,6 +193,13 @@ def generate(wwan):
         with open(config_file_wwan, 'w') as f:
             f.write(config_text)
 
+
+        # Create PPP chat script
+        tmpl = Template(chat_wwan_tmpl)
+        config_text = tmpl.render(wwan)
+        with open(chat_file_wwan, 'w') as f:
+            f.write(config_text)
+
     return None
 
 def apply(wwan):
-- 
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