Manual:API: Difference between revisions
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Revision as of 07:35, 7 March 2007
This document describes the operation of MikroTik RouterOS API for RouterOS3. The API (application programming interface) is a way to create your own versions of Winbox. This guide will help you make simplified, or translated conrol applications for RouterOS v3.
Enabling and Connecting
- Default API port is 8728. By default API is disabled
- Enable API
/ip service enable api
- Now you can initiate TCP connection to the API port of the router
Protocol
- Protocol stream is formatted as a sequence of words.
- Each word is encoded as lenght, followed by that many bytes of content.
- Words are grouped into sentences. End of sentence is terminated by zero length word.
- Lenght is encoded as follows:
| Value of length | Number of bytes | Encoding |
|---|---|---|
| 0 <= len <= 0x7F | 1 | len, lowest byte |
| 0x80 <= len <= 0x3FFF | 2 | len | 0x8000, two lower bytes |
| 0x4000 <= len <= 0x1FFFFF | 3 | len | 0xC00000, three lower bytes |
| 0x200000 <= len <= 0xFFFFFFF | 4 | len | 0xE0000000 |
| len >= 0x10000000 | 5 | 0xF0 and len as four bytes |
- Although this scheme allows encoding of length up to 0x7FFFFFFFF, only four byte length is supported.
- Bytes of len are sent most significant first (network order).
- If first byte of word is >= 0xF8, then it is a reserved control byte. After receiving unknown control byte API client cannot proceed, because it cannot know how to interpret following bytes.
- Currently control bytes are not used.
Short description of API sentences
- Empty sentences are ignored.
- Sentences are processed after receiving terminating zero length word.
- There is a limit on number and size of sentences client can send before it has logged in.
- Commands
- First word is name of command. Examples:
/login /ip/address/getall /user/active/listen /interface/vlan/remove /system/reboot
- Names of commands closely follow console, with spaces replaced by '/'. There are commands that are specific to API, like getall or login.
- Name of command should begin with '/'.
- Next, command arguments can be specified. Examples:
=address=10.0.0.1 =name=iu=c3Eeg =disable-running-check=yes
- Command argument should begin with '=' followed by name of argument, followed by another '=', followed by value of argument.
- Agrument value can be empty and can contain '='.
- First word of reply begins with '!'.
- Each command generates at least one reply (if connection does not get terminated).
- Last reply for every command is reply that has first word !done.
- Errors and exceptional conditions begin with !trap.
- Data replies begin with !re
Initial login
- First, clients sends /login command.
- Note that each command and response ends with an empty word.
- Reply contains =ret=challenge argument.
- Client sends second /login command, with =name=username and =response=response.
- In case of error, reply contains =ret=error message.
- In case of successful login client can start to issue commands.
Command examples
/system/package/getall
- Note that replies contain =.id=Item internal number property, that is not available in console. Names of properties that are API specific begin with dot.
- getall command is avaliable where console print command is available
Template:Bapi Template:Apic Template:Apic Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis |- | ... more !re sentences ... |- Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Eapi
/user/active/listen
- listen command is avaliable where console print command is available, but it does not have expected effect everywhere (i.e. may not work)
- !re sentences are generated as something changes in particular item list
- this command does not terminate
Template:Bapi Template:Apic Template:Apic Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis Template:Apis |- | ... more !re sentences ... |- Template:Eapi
Example client
- this is simple API client in Python
- usage: api.py ip-address username password
- after that type words from keyboard, terminating them with newline
#!/usr/bin/python
import sys, posix, time, md5, binascii, socket
class ApiRos:
"Routeros api"
def __init__(self, sk):
self.sk = sk
def login(self, username, pwd):
for repl, attrs in self.say(["/login"]):
chal = binascii.unhexlify(attrs['=ret'])
md = md5.new()
md.update('\x00')
md.update(pwd)
md.update(chal)
None in self.say(["/login", "=name=" + username, "=response=00" + binascii.hexlify(md.digest())])
def say(self, words):
if self.writeWords(words) == 0: return
while 1:
i = self.readWords()
repl = i.next()
attrs = {}
for w in i:
j = w.find('=', 1)
if (j == -1):
attrs[w] = ''
else:
attrs[w[:j]] = w[j+1:]
yield (repl, attrs)
if repl == '!done': return
def writeWords(self, words):
ret = 0
for w in words:
self.writeWord(w)
ret += 1
self.writeWord('')
return ret
def readWords(self):
while 1:
w = self.readWord()
if (w != ''): break
while 1:
yield w
w = self.readWord()
if w == '': return
def writeWord(self, w):
print "<<< " + w
self.writeLen(len(w))
self.writeStr(w)
def readWord(self):
ret = self.readStr(self.readLen())
print ">>> " + ret
return ret
def writeLen(self, l):
if l < 0x80:
self.writeStr(chr(l))
elif l < 0x4000:
l |= 0x8000
self.writeStr(chr((l >> 8) & 0xFF))
self.writeStr(chr(l & 0xFF))
elif l < 0x200000:
l |= 0xC00000
self.writeStr(chr((l >> 16) & 0xFF))
self.writeStr(chr((l >> 8) & 0xFF))
self.writeStr(chr(l & 0xFF))
elif l < 0x10000000:
l |= 0xE0000000
self.writeStr(chr((l >> 24) & 0xFF))
self.writeStr(chr((l >> 16) & 0xFF))
self.writeStr(chr((l >> 8) & 0xFF))
self.writeStr(chr(l & 0xFF))
else:
self.writeStr(chr(0xF0))
self.writeStr(chr((l >> 24) & 0xFF))
self.writeStr(chr((l >> 16) & 0xFF))
self.writeStr(chr((l >> 8) & 0xFF))
self.writeStr(chr(l & 0xFF))
def readLen(self):
c = ord(self.readStr(1))
if (c & 0x80) == 0x00:
pass
elif (c & 0xC0) == 0x80:
c &= ~0xC0
c <<= 8
c += ord(self.readStr(1))
elif (c & 0xE0) == 0xC0:
c &= ~0xE0
c <<= 8
c += ord(self.readStr(1))
c <<= 8
c += ord(self.readStr(1))
elif (c & 0xF0) == 0xE0:
c &= ~0xF0
c <<= 8
c += ord(self.readStr(1))
c <<= 8
c += ord(self.readStr(1))
c <<= 8
c += ord(self.readStr(1))
elif (c & 0xF8) == 0xF0:
c = ord(self.readStr(1))
c <<= 8
c += ord(self.readStr(1))
c <<= 8
c += ord(self.readStr(1))
c <<= 8
c += ord(self.readStr(1))
return c
def writeStr(self, str):
n = 0;
while n < len(str):
r = self.sk.send(str[n:])
if r == 0: raise RuntimeError, "connection closed by remote end"
n += r
def readStr(self, length):
ret = ''
while len(ret) < length:
s = self.sk.recv(length - len(ret))
if s == '': raise RuntimeError, "connection closed by remote end"
ret += s
return ret
def getParagraph():
for l in iter(sys.stdin.readline, '\n'):
yield l[:-1]
def main():
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((sys.argv[1], 8728))
apiros = ApiRos(s);
apiros.login(sys.argv[2], sys.argv[3]);
while 1:
for repl, attrs in apiros.say(getParagraph()):
print repl
print attrs
print ''
if __name__ == '__main__':
main()