Add Netbsd support (#62)

Add support for the NetBSD Operating System.                                    
                                                                                
Features in this branch:                                                        
* Add BSD distro parent class from which NetBSD and FreeBSD can                 
  specialize                                                                    
* Add *bsd util functions to cloudinit.net and cloudinit.net.bsd_utils          
* subclass cloudinit.distro.freebsd.Distro from bsd.Distro                      
* Add new cloudinit.distro.netbsd and cloudinit.net.renderer for                
  netbsd                                                                        
* Add lru_cached util.is_NetBSD functions                                       
* Add NetBSD detection for ConfigDrive and NoCloud datasources                  
                                                                                
This branch has been tested with:                                               
                                                                                
- NoCloud and OpenStack (with and without config-drive)                         
- NetBSD 8.1. and 9.0                                                           
- FreeBSD 11.2 and 12.1                                                         
- Python 3.7 only, because of the dependency oncrypt.METHOD_BLOWFISH.           
  This version is available in NetBSD 7, 8 and 9 anyway

1 files changed, 51 insertions, 1 deletions

diff --git a/cloudinit/netinfo.py b/cloudinit/netinfo.py
index 6ba21f4d..1001f149 100644
--- a/cloudinit/netinfo.py
+++ b/cloudinit/netinfo.py
@@ -91,6 +91,53 @@ def _netdev_info_iproute(ipaddr_out):
     return devs
 
 
+def _netdev_info_ifconfig_netbsd(ifconfig_data):
+    # fields that need to be returned in devs for each dev
+    devs = {}
+    for line in ifconfig_data.splitlines():
+        if len(line) == 0:
+            continue
+        if line[0] not in ("\t", " "):
+            curdev = line.split()[0]
+            # current ifconfig pops a ':' on the end of the device
+            if curdev.endswith(':'):
+                curdev = curdev[:-1]
+            if curdev not in devs:
+                devs[curdev] = deepcopy(DEFAULT_NETDEV_INFO)
+        toks = line.lower().strip().split()
+        if len(toks) > 1:
+            if re.search(r"flags=[x\d]+<up.*>", toks[1]):
+                devs[curdev]['up'] = True
+
+        for i in range(len(toks)):
+            if toks[i] == "inet":  # Create new ipv4 addr entry
+                network, net_bits = toks[i + 1].split('/')
+                devs[curdev]['ipv4'].append(
+                    {'ip': network, 'mask': net_prefix_to_ipv4_mask(net_bits)})
+            elif toks[i] == "broadcast":
+                devs[curdev]['ipv4'][-1]['bcast'] = toks[i + 1]
+            elif toks[i] == "address:":
+                devs[curdev]['hwaddr'] = toks[i + 1]
+            elif toks[i] == "inet6":
+                if toks[i + 1] == "addr:":
+                    devs[curdev]['ipv6'].append({'ip': toks[i + 2]})
+                else:
+                    devs[curdev]['ipv6'].append({'ip': toks[i + 1]})
+            elif toks[i] == "prefixlen":  # Add prefix to current ipv6 value
+                addr6 = devs[curdev]['ipv6'][-1]['ip'] + "/" + toks[i + 1]
+                devs[curdev]['ipv6'][-1]['ip'] = addr6
+            elif toks[i].startswith("scope:"):
+                devs[curdev]['ipv6'][-1]['scope6'] = toks[i].lstrip("scope:")
+            elif toks[i] == "scopeid":
+                res = re.match(r'.*<(\S+)>', toks[i + 1])
+                if res:
+                    devs[curdev]['ipv6'][-1]['scope6'] = res.group(1)
+                else:
+                    devs[curdev]['ipv6'][-1]['scope6'] = toks[i + 1]
+
+    return devs
+
+
 def _netdev_info_ifconfig(ifconfig_data):
     # fields that need to be returned in devs for each dev
     devs = {}
@@ -149,7 +196,10 @@ def _netdev_info_ifconfig(ifconfig_data):
 
 def netdev_info(empty=""):
     devs = {}
-    if util.which('ip'):
+    if util.is_NetBSD():
+        (ifcfg_out, _err) = util.subp(["ifconfig", "-a"], rcs=[0, 1])
+        devs = _netdev_info_ifconfig_netbsd(ifcfg_out)
+    elif util.which('ip'):
         # Try iproute first of all
         (ipaddr_out, _err) = util.subp(["ip", "addr", "show"])
         devs = _netdev_info_iproute(ipaddr_out)