def _get_if_list():
"""
Function to read the interfaces from /proc/net/dev
"""
try:
f = open("/proc/net/dev", "rb")
except IOError:
try:
f.close()
except Exception:
pass
log_loading.critical("Can't open /proc/net/dev !")
return []
lst = []
f.readline()
f.readline()
for line in f:
line = plain_str(line)
lst.append(line.split(":")[0].strip())
f.close()
return lst
def read_routes():
try:
f = open("/proc/net/route", "rb")
except IOError:
log_loading.critical("Can't open /proc/net/route !")
return []
routes = []
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
ifreq = ioctl(s, SIOCGIFADDR, struct.pack("16s16x", conf.loopback_name.encode("utf8"))) # noqa: E501
addrfamily = struct.unpack("h", ifreq[16:18])[0]
if addrfamily == socket.AF_INET:
ifreq2 = ioctl(s, SIOCGIFNETMASK, struct.pack("16s16x", conf.loopback_name.encode("utf8"))) # noqa: E501
msk = socket.ntohl(struct.unpack("I", ifreq2[20:24])[0])
dst = socket.ntohl(struct.unpack("I", ifreq[20:24])[0]) & msk
ifaddr = scapy.utils.inet_ntoa(ifreq[20:24])
routes.append((dst, msk, "0.0.0.0", conf.loopback_name, ifaddr, 1)) # noqa: E501
else:
warning("Interface %s: unknown address family (%i)" % (conf.loopback_name, addrfamily)) # noqa: E501
except IOError as err:
if err.errno == 99:
warning("Interface %s: no address assigned" % conf.loopback_name) # noqa: E501
else:
warning("Interface %s: failed to get address config (%s)" % (conf.loopback_name, str(err))) # noqa: E501
for line in f.readlines()[1:]:
line = plain_str(line)
iff, dst, gw, flags, _, _, metric, msk, _, _, _ = line.split()
flags = int(flags, 16)
if flags & RTF_UP == 0:
continue
if flags & RTF_REJECT:
continue
try:
ifreq = ioctl(s, SIOCGIFADDR, struct.pack("16s16x", iff.encode("utf8"))) # noqa: E501
except IOError: # interface is present in routing tables but does not have any assigned IP # noqa: E501
ifaddr = "0.0.0.0"
ifaddr_int = 0
else:
addrfamily = struct.unpack("h", ifreq[16:18])[0]
if addrfamily == socket.AF_INET:
ifaddr = scapy.utils.inet_ntoa(ifreq[20:24])
ifaddr_int = struct.unpack("!I", ifreq[20:24])[0]
else:
warning("Interface %s: unknown address family (%i)", iff, addrfamily) # noqa: E501
continue
# Attempt to detect an interface alias based on addresses inconsistencies # noqa: E501
dst_int = socket.htonl(int(dst, 16)) & 0xffffffff
msk_int = socket.htonl(int(msk, 16)) & 0xffffffff
gw_str = scapy.utils.inet_ntoa(struct.pack("I", int(gw, 16)))
metric = int(metric)
route = [dst_int, msk_int, gw_str, iff, ifaddr, metric]
if ifaddr_int & msk_int != dst_int:
tmp_route = get_alias_address(iff, dst_int, gw_str, metric)
if tmp_route:
route = tmp_route
routes.append(tuple(route))
f.close()
s.close()
return routes
ips.append(addr)
a = a.contents.next
flags = FlagValue(flags, _pcap_if_flags)
if_list[name] = (description, ips, flags, mac)
p = p.contents.next
conf.cache_pcapiflist = if_list
except Exception:
raise
finally:
pcap_freealldevs(devs)
except OSError:
conf.use_pcap = False
if WINDOWS:
if conf.interactive:
log_loading.critical(
"Npcap/Winpcap is not installed ! See "
"https://scapy.readthedocs.io/en/latest/installation.html#windows" # noqa: E501
)
else:
if conf.interactive:
log_loading.critical("Libpcap is not installed!")
else:
if WINDOWS:
# Detect Pcap version: check for Npcap
version = pcap_lib_version()
if b"winpcap" in version.lower():
if os.path.exists(NPCAP_PATH + "\\wpcap.dll"):
warning("Winpcap is installed over Npcap. "
"Will use Winpcap (see 'Winpcap/Npcap conflicts' "
"in Scapy's docs)")
elif platform.release() != "XP":
warning("WinPcap is now deprecated (not maintained). "
