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//usr/lib/python2.6/site-packages/cloudinit/netinfo.py
# vi: ts=4 expandtab # # Copyright (C) 2012 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # Copyright (C) 2012 Yahoo! Inc. # # Author: Scott Moser <scott.moser@canonical.com> # Author: Juerg Haefliger <juerg.haefliger@hp.com> # Author: Joshua Harlow <harlowja@yahoo-inc.com> # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License version 3, 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, see <http://www.gnu.org/licenses/>. import cloudinit.util as util import re from prettytable import PrettyTable def netdev_info(empty=""): fields = ("hwaddr", "addr", "bcast", "mask") (ifcfg_out, _err) = util.subp(["ifconfig", "-a"]) devs = {} for line in str(ifcfg_out).splitlines(): if len(line) == 0: continue if line[0] not in ("\t", " "): curdev = line.split()[0] devs[curdev] = {"up": False} for field in fields: devs[curdev][field] = "" toks = line.lower().strip().split() if toks[0] == "up": devs[curdev]['up'] = True # If the output of ifconfig doesn't contain the required info in the # obvious place, use a regex filter to be sure. elif len(toks) > 1: if re.search(r"flags=\d+<up,", toks[1]): devs[curdev]['up'] = True fieldpost = "" if toks[0] == "inet6": fieldpost = "6" for i in range(len(toks)): # older net-tools (ubuntu) show 'inet addr:xx.yy', # newer (freebsd and fedora) show 'inet xx.yy' # just skip this 'inet' entry. (LP: #1285185) try: if (toks[i] in ("inet", "inet6") and toks[i + 1].startswith("addr:")): continue except IndexError: pass # Couple the different items we're interested in with the correct # field since FreeBSD/CentOS/Fedora differ in the output. ifconfigfields = { "addr:": "addr", "inet": "addr", "bcast:": "bcast", "broadcast": "bcast", "mask:": "mask", "netmask": "mask", "hwaddr": "hwaddr", "ether": "hwaddr", } for origfield, field in ifconfigfields.items(): target = "%s%s" % (field, fieldpost) if devs[curdev].get(target, ""): continue if toks[i] == "%s" % origfield: try: devs[curdev][target] = toks[i + 1] except IndexError: pass elif toks[i].startswith("%s" % origfield): devs[curdev][target] = toks[i][len(field) + 1:] if empty != "": for (_devname, dev) in devs.iteritems(): for field in dev: if dev[field] == "": dev[field] = empty return devs def route_info(): (route_out, _err) = util.subp(["netstat", "-rn"]) routes = [] entries = route_out.splitlines()[1:] for line in entries: if not line: continue toks = line.split() # FreeBSD shows 6 items in the routing table: # Destination Gateway Flags Refs Use Netif Expire # default 10.65.0.1 UGS 0 34920 vtnet0 # # Linux netstat shows 2 more: # Destination Gateway Genmask Flags MSS Window irtt Iface # 0.0.0.0 10.65.0.1 0.0.0.0 UG 0 0 0 eth0 if (len(toks) < 6 or toks[0] == "Kernel" or toks[0] == "Destination" or toks[0] == "Internet" or toks[0] == "Internet6" or toks[0] == "Routing"): continue if len(toks) < 8: toks.append("-") toks.append("-") toks[7] = toks[5] toks[5] = "-" entry = { 'destination': toks[0], 'gateway': toks[1], 'genmask': toks[2], 'flags': toks[3], 'metric': toks[4], 'ref': toks[5], 'use': toks[6], 'iface': toks[7], } routes.append(entry) return routes def getgateway(): routes = [] try: routes = route_info() except: pass for r in routes: if r['flags'].find("G") >= 0: return "%s[%s]" % (r['gateway'], r['iface']) return None def netdev_pformat(): lines = [] try: netdev = netdev_info(empty=".") except Exception: lines.append(util.center("Net device info failed", '!', 80)) netdev = None if netdev is not None: fields = ['Device', 'Up', 'Address', 'Mask', 'Hw-Address'] tbl = PrettyTable(fields) for (dev, d) in netdev.iteritems(): tbl.add_row([dev, d["up"], d["addr"], d["mask"], d["hwaddr"]]) netdev_s = tbl.get_string() max_len = len(max(netdev_s.splitlines(), key=len)) header = util.center("Net device info", "+", max_len) lines.extend([header, netdev_s]) return "\n".join(lines) def route_pformat(): lines = [] try: routes = route_info() except Exception: lines.append(util.center('Route info failed', '!', 80)) routes = None if routes is not None: fields = ['Route', 'Destination', 'Gateway', 'Genmask', 'Interface', 'Flags'] tbl = PrettyTable(fields) for (n, r) in enumerate(routes): route_id = str(n) tbl.add_row([route_id, r['destination'], r['gateway'], r['genmask'], r['iface'], r['flags']]) route_s = tbl.get_string() max_len = len(max(route_s.splitlines(), key=len)) header = util.center("Route info", "+", max_len) lines.extend([header, route_s]) return "\n".join(lines) def debug_info(prefix='ci-info: '): lines = [] netdev_lines = netdev_pformat().splitlines() if prefix: for line in netdev_lines: lines.append("%s%s" % (prefix, line)) else: lines.extend(netdev_lines) route_lines = route_pformat().splitlines() if prefix: for line in route_lines: lines.append("%s%s" % (prefix, line)) else: lines.extend(route_lines) return "\n".join(lines)
