[spp] [PATCH 1/2] controller: fix checking invalid server address

[ogawa.yasufumi@lab.ntt.co.jp]

From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>

For value of `--bind-addr` or `-b` option, SPP CLI checks if it matches
to `*.*.*.*` for IPv4 address, but it is inadeaute because no checkings
for the range of values. This update is to add methods for the
validation.

Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
---
 src/controller/shell_lib/common.py | 22 ++++++++++++++++++++++
 src/controller/spp.py              |  8 ++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/controller/shell_lib/common.py b/src/controller/shell_lib/common.py
index 360d601..3c59cca 100644
--- a/src/controller/shell_lib/common.py
+++ b/src/controller/shell_lib/common.py
@@ -100,3 +100,25 @@ def is_comment_line(line):
             return True
         else:
             return False
+
+
+def is_valid_ipv4_addr(ipaddr):
+    ip_nums = ipaddr.split('.')
+
+    if len(ip_nums) != 4:
+        return False
+
+    for num in ip_nums:
+        num = int(num)
+        if (num < 0) or (num > 255):
+            return False
+
+    return True
+
+
+def is_valid_port(port_num):
+    num = int(port_num)
+    if (num < 1023) or (num > 65535):
+        return False
+
+    return True
diff --git a/src/controller/spp.py b/src/controller/spp.py
index 7b7316c..a74209b 100644
--- a/src/controller/spp.py
+++ b/src/controller/spp.py
@@ -7,6 +7,7 @@ from __future__ import absolute_import
 import argparse
 import re
 from .shell import Shell
+from .shell_lib import common
 from . import spp_ctl_client
 import sys
 
@@ -30,11 +31,14 @@ def main(argv):
     for addr in args.bind_addr:
         if ':' in addr:
             api_ipaddr, api_port = addr.split(':')
+            if common.is_valid_port(api_port) is False:
+                print('Error: Invalid port in "{}"'.format(addr))
+                exit()
         else:
             api_ipaddr = addr
 
-        if not re.match(r'\d*\.\d*\.\d*\.\d*', addr):
-            print('Invalid address "%s"' % args.bind_addr)
+        if common.is_valid_ipv4_addr(api_ipaddr) is False:
+            print('Error: Invalid address "{}"'.format(addr))
             exit()
 
         spp_ctl_cli = spp_ctl_client.SppCtlClient(api_ipaddr, int(api_port))
-- 
2.7.4