scottk/wlan-lanforge-scripts
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openwrt-ctl: Support bringing up reverse ssh tunnel.

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This will let us log in on serial port to bring up a reverse
ssh tunnel so that we can then connect in via ssh from a jumphost,
regardless of how far behind NAT firewalls is the AP...

Signed-off-by: Ben Greear <greearb@candelatech.com>
This commit is contained in:
Ben Greear
2021-02-01 07:49:35 -08:00
parent edb9c693c3
commit 5b9b389bf8
1 changed files with 22 additions and 3 deletions
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25
openwrt_ctl.py
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@@ -8,6 +8,11 @@ You might need to install pexpect-serial using pip:
$ pip3 install pexpect-serial
./openwrt_ctl.py -l stdout -u root -p TIP -s serial --tty ttyUSB0
# Set up reverse ssh tunnel
./openwrt_ctl.py --tty /dev/ttyAP1 --action ssh-tunnel \
--value "ssh -y -y -f -N -T -M -R 9999:localhost:22 lanforge@10.28.3.100" \
--value2 password-for-10.28.3.100 --log stdout --scheme serial --prompt root@Open
'''
@@ -48,9 +53,9 @@ def usage():
print("--prompt Prompt to look for when commands are done (default: root@OpenWrt)")
print("-s|--scheme (serial|telnet|ssh): connect via serial, ssh or telnet")
print("-l|--log file log messages here")
print("--action (logread | journalctl | lurk | sysupgrade | download | upload | reboot | cmd")
print("--action (logread | journalctl | lurk | sysupgrade | download | upload | reboot | cmd | ssh-tunnel")
print("--value (option to help complete the action")
print("--value2 (option to help complete the action, dest filename for download")
print("--value2 (option to help complete the action, dest filename for download, passwd for ssh-tunnel")
print("-h|--help")
# see https://stackoverflow.com/a/13306095/11014343
@@ -78,7 +83,7 @@ def main():
parser.add_argument("-t", "--tty", type=str, help="tty serial device")
parser.add_argument("-l", "--log", type=str, help="logfile for messages, stdout means output to console")
parser.add_argument("--action", type=str, help="perform action",
choices=["logread", "journalctl", "lurk", "sysupgrade", "sysupgrade-n", "download", "upload", "reboot", "cmd" ])
choices=["logread", "journalctl", "lurk", "sysupgrade", "sysupgrade-n", "download", "upload", "reboot", "cmd", "ssh-tunnel" ])
parser.add_argument("--value", type=str, help="set value")
parser.add_argument("--value2", type=str, help="set value2")
tty = None
@@ -247,6 +252,20 @@ def main():
TO=1
wait_forever = True
if (args.action == "ssh-tunnel"):
command = "%s"%(args.value)
passwd = "%s"%(args.value2)
logg.info("Command[%s]"%command)
egg.sendline(command);
i = egg.expect(["password:", "Do you want to continue connecting"], timeout=5)
if i == 1:
egg.sendline("y")
egg.expect("password:", timeout=5)
egg.sendline(passwd)
egg.expect(CCPROMPT, timeout=20)
return
if ((args.action == "sysupgrade") or (args.action == "sysupgrade-n")):
command = "scp %s /tmp/new_img.bin"%(args.value)
logg.info("Command[%s]"%command)