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|
# $Id$
#
from socket import *
import re
import random
import time
import sys
import inc_cfg as cfg
from select import *
# SIP request template
req_templ = \
"""$METHOD $TARGET_URI SIP/2.0\r
Via: SIP/2.0/UDP $LOCAL_IP:$LOCAL_PORT;rport;branch=z9hG4bK$BRANCH\r
Max-Forwards: 70\r
From: <sip:caller@pjsip.org>$FROM_TAG\r
To: <$TARGET_URI>$TO_TAG\r
Contact: <sip:$LOCAL_IP:$LOCAL_PORT;transport=udp>\r
Call-ID: $CALL_ID@pjsip.org\r
CSeq: $CSEQ $METHOD\r
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, REFER\r
Supported: replaces, 100rel, norefersub\r
User-Agent: pjsip.org Python tester\r
Content-Length: $CONTENT_LENGTH\r
$SIP_HEADERS"""
def is_request(msg):
return msg.split(" ", 1)[0] != "SIP/2.0"
def is_response(msg):
return msg.split(" ", 1)[0] == "SIP/2.0"
def get_code(msg):
if msg=="":
return 0
return int(msg.split(" ", 2)[1])
def get_tag(msg, hdr="To"):
pat = "^" + hdr + ":.*"
result = re.search(pat, msg, re.M | re.I)
if result==None:
return ""
line = result.group()
#print "line=", line
tags = line.split(";tag=")
if len(tags)>1:
return tags[1]
return ""
#return re.split("[;& ]", s)
class Dialog:
sock = None
dst_addr = ""
dst_port = 5060
local_ip = ""
local_port = 0
tcp = False
call_id = str(random.random())
cseq = 0
local_tag = ";tag=" + str(random.random())
rem_tag = ""
last_resp_code = 0
inv_branch = ""
trace_enabled = True
last_request = ""
def __init__(self, dst_addr, dst_port=5060, tcp=False, trace=True):
self.dst_addr = dst_addr
self.dst_port = dst_port
self.tcp = tcp
self.trace_enabled = trace
if tcp==True:
self.sock = socket(AF_INET, SOCK_STREAM)
self.sock.connect(dst_addr, dst_port)
else:
self.sock = socket(AF_INET, SOCK_DGRAM)
self.sock.bind(("127.0.0.1", 0))
self.local_ip, self.local_port = self.sock.getsockname()
self.trace("Dialog socket bound to " + self.local_ip + ":" + str(self.local_port))
def trace(self, txt):
if self.trace_enabled:
print str(time.strftime("%H:%M:%S ")) + txt
def create_req(self, method, sdp, branch="", extra_headers=""):
if branch=="":
self.cseq = self.cseq + 1
msg = req_templ
msg = msg.replace("$METHOD", method)
if self.tcp:
transport_param = ";transport=tcp"
else:
transport_param = ""
msg = msg.replace("$TARGET_URI", "sip:"+self.dst_addr+":"+str(self.dst_port) + transport_param)
msg = msg.replace("$LOCAL_IP", self.local_ip)
msg = msg.replace("$LOCAL_PORT", str(self.local_port))
if branch=="":
branch=str(random.random())
msg = msg.replace("$BRANCH", branch)
msg = msg.replace("$FROM_TAG", self.local_tag)
msg = msg.replace("$TO_TAG", self.rem_tag)
msg = msg.replace("$CALL_ID", self.call_id)
msg = msg.replace("$CSEQ", str(self.cseq))
msg = msg.replace("$SIP_HEADERS", extra_headers)
if sdp!="":
msg = msg.replace("$CONTENT_LENGTH", str(len(sdp)))
msg = msg + "Content-Type: application/sdp\r\n"
else:
msg = msg.replace("$CONTENT_LENGTH", "0")
msg = msg + "\r\n"
msg = msg + sdp
return msg
def create_invite(self, sdp, extra_headers=""):
self.inv_branch = str(random.random())
return self.create_req("INVITE", sdp, branch=self.inv_branch, extra_headers=extra_headers)
def create_ack(self, sdp="", extra_headers=""):
return self.create_req("ACK", sdp, extra_headers=extra_headers, branch=self.inv_branch)
def create_bye(self, extra_headers=""):
return self.create_req("BYE", "", extra_headers)
def send_msg(self, msg):
if (is_request(msg)):
self.last_request = msg.split(" ", 1)[0]
self.trace("============== TX MSG ============= \n" + msg)
self.sock.sendto(msg, 0, (self.dst_addr, self.dst_port))
def wait_msg(self, timeout):
endtime = time.time() + timeout
msg = ""
while time.time() < endtime:
readset = select([self.sock], [], [], timeout)
if len(readset) < 1 or not self.sock in readset[0]:
if len(readset) < 1:
print "select() returns " + str(len(readset))
elif not self.sock in readset[0]:
print "select() alien socket"
else:
print "select other error"
continue
try:
msg = self.sock.recv(2048)
except:
print "recv() exception: ", sys.exc_info()[0]
continue
if msg=="":
return ""
if self.last_request=="INVITE" and self.rem_tag=="":
self.rem_tag = get_tag(msg, "To")
self.rem_tag = self.rem_tag.rstrip("\r\n;")
if self.rem_tag != "":
self.rem_tag = ";tag=" + self.rem_tag
self.trace("=== rem_tag:" + self.rem_tag)
self.trace("=========== RX MSG ===========\n" + msg)
return msg
# Send request and wait for final response
def send_request_wait(self, msg, timeout):
t1 = 1.0
endtime = time.time() + timeout
resp = ""
code = 0
for i in range(0,5):
self.send_msg(msg)
resp = self.wait_msg(t1)
if resp!="" and is_response(resp):
code = get_code(resp)
break
last_resp = resp
while code < 200 and time.time() < endtime:
resp = self.wait_msg(endtime - time.time())
if resp != "" and is_response(resp):
code = get_code(resp)
last_resp = resp
elif resp=="":
break
return last_resp
def hangup(self, last_code=0):
self.trace("====== hangup =====")
if last_code!=0:
self.last_resp_code = last_code
if self.last_resp_code>0 and self.last_resp_code<200:
msg = self.create_req("CANCEL", "", branch=self.inv_branch, extra_headers="")
self.send_request_wait(msg, 5)
msg = self.create_ack()
self.send_msg(msg)
elif self.last_resp_code>=200 and self.last_resp_code<300:
msg = self.create_ack()
self.send_msg(msg)
msg = self.create_bye()
self.send_request_wait(msg, 5)
else:
msg = self.create_ack()
self.send_msg(msg)
class SendtoCfg:
# Test name
name = ""
# pjsua InstanceParam
inst_param = None
# Initial SDP
sdp = ""
# Extra headers to add to request
extra_headers = ""
# Expected code
resp_code = 0
# Use TCP?
use_tcp = False
# List of RE patterns that must exist in response
resp_include = []
# List of RE patterns that must NOT exist in response
resp_exclude = []
# Constructor
def __init__(self, name, pjsua_args, sdp, resp_code,
resp_inc=[], resp_exc=[], use_tcp=False,
extra_headers=""):
self.sdp = sdp
self.resp_code = resp_code
self.resp_include = resp_inc
self.resp_exclude = resp_exc
self.use_tcp = use_tcp
self.extra_headers = extra_headers
self.inst_param = cfg.InstanceParam("pjsua", pjsua_args)
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