FilesExpand file tree

 master

/

cloud-web-ipallocator.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

executable file

·

159 lines (129 loc) · 4.52 KB

 master

/

cloud-web-ipallocator.py

Copy path

Top

File metadata and controls

• Code
• Blame

executable file

·

159 lines (129 loc) · 4.52 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

#! /usr/bin/python3

# Licensed to the Apache Software Foundation (ASF) under one

# or more contributor license agreements. See the NOTICE file

# distributed with this work for additional information

# regarding copyright ownership. The ASF licenses this file

# to you under the Apache License, Version 2.0 (the

# "License"); you may not use this file except in compliance

# with the License. You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing,

# software distributed under the License is distributed on an

# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

# KIND, either express or implied. See the License for the

# specific language governing permissions and limitations

# under the License.

import web

import socket, struct

import cloud_utils

from cloud_utils import Command

urls = ("/ipallocator", "ipallocator")

app = web.application(urls, globals())

augtool = Command("augtool")

service = Command("service")

class dhcp:

_instance = None

def __init__(self):

self.availIP=[]

self.router=None

self.netmask=None

self.initialized=False

options = augtool.match("/files/etc/dnsmasq.conf/dhcp-option").stdout.decode('utf-8').strip()

for option in options.splitlines():

if option.find("option:router") != -1:

self.router = option.split("=")[1].strip().split(",")[1]

print(self.router)

dhcp_range = augtool.get("/files/etc/dnsmasq.conf/dhcp-range").stdout.decode('utf-8').strip()

dhcp_start = dhcp_range.split("=")[1].strip().split(",")[0]

dhcp_end = dhcp_range.split("=")[1].strip().split(",")[1]

self.netmask = dhcp_range.split("=")[1].strip().split(",")[2]

print(dhcp_start, dhcp_end, self.netmask)

start_ip_num = self.ipToNum(dhcp_start);

end_ip_num = self.ipToNum(dhcp_end)

print(start_ip_num, end_ip_num)

for ip in range(start_ip_num, end_ip_num + 1):

self.availIP.append(ip)

print(self.availIP[0], self.availIP[len(self.availIP) - 1])

#load the ip already allocated

self.reloadAllocatedIP()

def ipToNum(self, ip):

return struct.unpack("!I", socket.inet_aton(ip))[0]

def numToIp(self, num):

return socket.inet_ntoa(struct.pack('!I', num))

def getFreeIP(self):

if len(self.availIP) > 0:

ip = self.numToIp(self.availIP[0])

self.availIP.remove(self.availIP[0])

return ip

else:

return None

def getNetmask(self):

return self.netmask

def getRouter(self):

return self.router

def getInstance():

if not dhcp._instance:

dhcp._instance = dhcp()

return dhcp._instance

getInstance = staticmethod(getInstance)

def reloadAllocatedIP(self):

dhcp_hosts = augtool.match("/files/etc/dnsmasq.conf/dhcp-host").stdout.decode('utf-8').strip().splitlines()

for host in dhcp_hosts:

if host.find("dhcp-host") != -1:

allocatedIP = self.ipToNum(host.split("=")[1].strip().split(",")[1])

if allocatedIP in self.availIP:

self.availIP.remove(allocatedIP)

def allocateIP(self, mac):

newIP = self.getFreeIP()

dhcp_host = augtool.match("/files/etc/dnsmasq.conf/dhcp-host").stdout.decode('utf-8').strip()

cnt = len(dhcp_host.splitlines()) + 1

script = """set %s %s

save"""%("/files/etc/dnsmasq.conf/dhcp-host[" + str(cnt) + "]", str(mac) + "," + newIP)

augtool < script

#reset dnsmasq

service("dnsmasq", "restart", stdout=None, stderr=None)

return newIP

def releaseIP(self, ip):

dhcp_host = augtool.match("/files/etc/dnsmasq.conf/dhcp-host").stdout.decode('utf-8').strip()

path = None

for host in dhcp_host.splitlines():

if host.find(ip) != -1:

path = host.split("=")[0].strip()

if path == None:

print("Can't find " + str(ip) + " in conf file")

return None

print(path)

script = """rm %s

save"""%(path)

augtool < script

self.availIP.remove(ip)

#reset dnsmasq

service("dnsmasq", "restart", stdout=None, stderr=None)

class ipallocator:

def GET(self):

try:

user_data = web.input()

command = user_data.command

print("Processing: " + command)

dhcpInit = dhcp.getInstance()

if command == "getIpAddr":

mac = user_data.mac

zone_id = user_data.dc

pod_id = user_data.pod

print(mac, zone_id, pod_id)

freeIP = dhcpInit.allocateIP(mac)

if not freeIP:

return "0,0,0"

print("Find an available IP: " + freeIP)

return freeIP + "," + dhcpInit.getNetmask() + "," + dhcpInit.getRouter()

elif command == "releaseIpAddr":

ip = user_data.ip

zone_id = user_data.dc

pod_id = user_data.pod

dhcpInit.releaseIP(ip)

except:

return None

if __name__ == "__main__":

app.run()