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import subprocess
import re
from client import unspice_channels
def parse_connect(line):
"""'{sa_family=AF_INET, sin_port=htons(5926), sin_addr=inet_addr("127.0.0.1")}, 16) = 0\n'"""
m = re.match('\s+\{sa_family=(?P<family>[A-Z_]+),\s+sin_port=htons\((?P<port>[0-9]+)\),\s+sin_addr=inet_addr\("(?P<host>[0-9.]+)"\)\},\s+([0-9]+)\)\s+=\s+(?P<ret>[0-9])+\n', line)
if not m: return m
return m.groupdict()
def from_quoted(s):
return ''.join(chr(int(s[i+2:i+4], 16)) for i in
xrange(0, len(s), 4))
def match_message_container(line, rexp):
m = re.match(rexp, line)
if not m: return m
d = m.groupdict()
d['msg'] = from_quoted(d['msg'])
d['size'] = int(d['size'])
if 'ret' in d:
d['ret'] = int(d['ret'])
assert(len(d['msg']) == d['ret'])
d['type'] = 'sendto'
return d
def parse_sendto(line):
""""\x14\x00\x00\x00\x16\x00\x01\x03\x06\x83\x59\x4c\x00\x00\x00\x00\x00\x00\x00\x00", 20, 0, {sa_family=AF_NETLINK, pid=0, groups=00000000}, 12) = 20"""
if 'unfinished' in line:
return match_message_container(line, '\s+"(?P<msg>[x0-9a-f\\\\]+)"\.?\.?\.?,\s+(?P<size>[0-9]+),\s+([0-9]+),\s+.+,\s+([0-9]+) <unfinished ...>\n')
return match_message_container(line, '\s+"(?P<msg>[x0-9a-f\\\\]+)"\.?\.?\.?,\s+(?P<size>[0-9]+),\s+([0-9]+),\s+.+,\s+([0-9]+)\)\s+=\s+(?P<ret>[0-9]+)\n')
def parse_recvfrom(line):
""""\x00\x00\x00\x00\xd2\x01\x00\x00\x1d\x01\x00\x00\x80\x02\x00\x00\x30\x02\x00\x00\x00\xba\x02\x00\x00\xb6\x01\x00\x00", 29, 0, NULL, NULL) = 29"""
return match_message_container(line, '\s+"(?P<msg>[x0-9a-f\\\\]+)"\.?\.?\.?,\s+(?P<size>[0-9]+),\s+([0-9]+),.+,.+\)\s+=\s+(?P<ret>[0-9]+)\n')
def parse_recvmsg(line):
print "TODO - parse_recvmsg"
return
def parse_sendmsg(line):
print "TODO - parse_sendmsg"
return
def parse_start(line):
# really lame parsing, won't deal with nested first arguments - but
# works for all the system calls we are interested in. Actually just
# adding nesting level to each char would solve this.
m = re.search('\[pid\s+([0-9]+)\]\s+([a-zA-Z0-9]+)\(([^,]+),', line)
return m
class StracerNetwork(object):
_unhandled_syscalls = set(['socket', 'bind', 'getsockname', 'setsockopt',
# later
'getpeername', 'getsockopt', 'shutdown'])
def __init__(self, cmd, on_message = lambda x: None):
self.max_bytes_per_message = max_bytes = 2**20
self._p = subprocess.Popen(
('strace -qvxx -e trace=network -s %s -Cf %s' % (max_bytes, cmd)).split(),
stderr=subprocess.PIPE)
self.connections = []
self.sockets = {}
self._message_count = 0
self._lines = []
self.on_message = on_message
def total_length(self, n):
if n not in self.sockets:
return 0
return sum([len(d['msg']) for m, d in self.sockets[n] if d is not None and 'msg' in d])
def terse(self, count=10):
while sum([len(v) for v in self.sockets.values()]) < count:
print sum(map(len, self.sockets.items()))
self.handle_line()
sorted_keys = list(sorted(self.sockets.keys()))
return sorted_keys, [self.terse_key(k) for k in sorted_keys]
def terse_key(self, key):
return [(dict(recvfrom='R',sendto='S').get(tag), d['msg'])
for ((tag, line), d) in self.sockets[key] if d is not None]
def conversations(self, count=10):
keys, terses = self.terse(count=count)
return keys, [[''.join([msg for t,msg in terse if t==k]) for k in 'SR']
for terse in terses]
def spiced(self, count=10):
keys, collecteds = self.conversations(count)
return unspice_channels(keys, collecteds)
def lines(self):
for line in self._p.stderr:
print line if len(line) < 100 else line[:100] + '...'
self._lines.append(line)
yield line
def wait_for_connect(self, host):
while not self.host_connected(host):
self.handle_line()
def host_connected(self, host):
return any([d['host'] == host for d in self.connections])
def add_to_socket(self, sock, tag, line, parser):
if sock not in self.sockets:
print "did I miss a connect?? at %s" % len(self._lines)
self.add_socket(sock)
parsed = parser(line)
self.sockets[sock].append(((tag, line), parsed))
self._message_count += 1
if parsed:
self.on_message(parsed['msg'])
def add_socket(self, sock, d={}):
d['sock'] = sock
if 'host' not in d:
d['host'] = 'unknown'
self.connections.append(d)
self.sockets[sock] = []
def handle_line(self):
line = self.lines().next()
m = parse_start(line)
if not m: return
line = line[m.end():]
pid, syscall, firstarg = m.groups()
if 'connect' in syscall:
d = parse_connect(line)
if not d: return
self.add_socket(int(firstarg), d)
elif 'sendto' in syscall:
self.add_to_socket(int(firstarg), 'sendto', line, parse_sendto)
elif 'recvmsg' in syscall:
self.add_to_socket(int(firstarg), 'recvmsg', line, parse_recvmsg)
elif 'recvfrom' in syscall:
self.add_to_socket(int(firstarg), 'recvfrom', line, parse_recvfrom)
elif 'sendmsg' in syscall:
self.add_to_socket(int(firstarg), 'sendmsg', line, parse_sendmsg)
elif syscall in self._unhandled_syscalls:
pass
else:
print "unhandled %s" % syscall
import pdb; pdb.set_trace()
def wait_for(self, num):
ret = []
start_count = self._message_count
while True:
self.handle_line()
if self._message_count - start_count >= num:
return
def trace_spicec(host, port):
s = StracerNetwork('/store/upstream/bin/spicec -h %s -p %s' % (host, port))
sock = s.wait_for_connect(host)
return s.filter(sock, 10)
if __name__ == '__main__':
trace_spicec('127.0.0.1', 5926)
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