I'm attempting to determine if the Auto Proxy URL on a Mac as been configured.
First, I want to get the port number
port=$(route get example.com | grep interface | sed 's/.*\(...\)/\1/')
Then use the port number to obtain the active network service
service=$(networksetup -listnetworkserviceorder | grep $port | sed 's/,.*$//; s/^.*: //')
And finally, I use the active network service to obtain the auto proxy info
autoproxy=$(networksetup -getautoproxyurl \"$service\")
I'm running into a problem with any network service that includes spaces. For example Wi-Fi works fine, but Apple USB Ethernet Adapter does not.
I thought the solution would be to escape the quotes (\"$service\")
The odd thing is that if I echo $service (where $service is Apple USB Ethernet Adapter) it returns a properly quoted result of "Apple USB Ethernet Adapter" If I then copy and paste this exact result as a replacement for the variable $service, I get the result I was expecting (URL: (null) Enabled: No)
However, running the command as it was originally written returns a parameter error (Error: The parameters were not valid).
This is the result of running the script as is:
autoproxy=$(networksetup -getautoproxyurl "$service")
echo $autoproxy
Error: The parameters were not valid.
However, if I copy and paste the output of $service, then it returns the result I was expecting.
service=$(networksetup -listnetworkserviceorder | grep $port | sed 's/,.*$//; s/^.*: //')
echo \"$service\"
"Apple USB Ethernet Adapter"
autoproxy=$(networksetup -getautoproxyurl "Apple USB Ethernet Adapter")
echo $autoproxy
URL: (null) Enabled: No
You are using "" for service variable in autoproxy expression.
Related
I have a small BASH backup script that uses Rsync to grab a handful of computers on my LAN. It works very well for static devices using an Ethernet cable - trouble comes in for my even smaller number of Laptop users that have docks. Every once in a while they do not connect to the Dock & Ethernet cable/statically assigned address and end up on the WiFi with a DHCP assigned address. I already have a list of known statically assigned targets in a file that is parsed through to actually backed up. So I keep thinking I should fairly easily be able to create a second file with an nmap scan before each backup run with other code I found - something like:
sudo nmap -n -sP 192.168.2.0/24 | awk '/Nmap scan report for/{printf $5;}/MAC Address:/{print " => "$3;}' | sort
which gives me a list of 192.168.2.101 => B4:FB:E4:FE:C6:6F for all found devices in the LAN. I just removed the | sort and send it to a file > found.devices instead.
So Now I have a list of found devices IP and MAC address - and I'd like to compare the two files and create a new target list with any changed IP addresses found (for those Laptop users that forgot to connect to the Dock and are now using DHCP). But I still want to keep my original targets file clean for the times that they do remember and also continue to get those other devices that are wired all the time while ignoring everything else on the LAN.
found.devices
192.168.2.190 => D4:XB:E4:FE:C6:6F
192.168.2.102 => B4:QB:Y4:FE:C6:6F
192.168.2.200 => B4:FB:P4:ZE:C6:6F
192.168.2.104 => B4:FB:E4:BE:P6:6F
known.targets
192.168.2.101 D4:XB:E4:FE:C6:6F domain source destination
192.168.2.102 B4:QB:Y4:FE:C6:6F domain source destination
192.168.2.103 B4:FB:P4:ZE:C6:6F domain source destination
192.168.2.104 B4:FB:E4:BE:P6:6F domain source destination
Should get a list or a file for the current back run to use of:
192.168.2.190 domain source destination
192.168.2.102 domain source destination
192.168.2.200 domain source destination
192.168.2.104 domain source destination
Currently my bash script just reads the file of known.targets one line at a time:
cat /known.targets | while read ip hostname source destination
do
this mounts and backs up the data I want ...
I really like the current system, and have found it to be very reliable for my simple needs, just need to find some way to get those users that intermittently forget to dock. I expect its series of nested loops, but I cannot get my head to wrap around it - been away from actual coding for too long - Any suggestions would be greatly appreciated. I'd also really like to get rid of the => and just use comma or space separated data but every time I mess with that awk statement - I end up shifting the data and getting an oddly placed CR somewhere I cannot figure it either!
Try this pure Bash code:
declare -A found_mac2ip
while read -r ip _ mac; do
[[ -n $mac ]] && found_mac2ip[$mac]=$ip
done <'found.devices'
while read -r ip mac domain source destination; do
ip=${found_mac2ip[$mac]-$ip}
# ... DO BACKUP FOR $ip ...
done <'known.targets'
It first sets up a Bash associative array mapping found mac address to ip addresses.
It then loops through the known.targets file and for each mac address it uses the ip address from the known.targets file if the mac address is listed in it. Otherwise it uses the ip address read from the known.targets file.
It's also possible to extract the "found" MAC and IP address information by getting it directly from the nmap output instead of from a `found.devices' file. This alternative version of the code does that:
declare -A found_mac2ip
nmap_output=$(sudo nmap -n -sP 192.168.2.0/24)
while IFS=$' \t\n()' read -r f1 f2 f3 f4 f5 _; do
[[ "$f1 $f2 $f3 $f4" == 'Nmap scan report for' ]] && ip=$f5
[[ "$f1 $f2" == 'MAC Address:' ]] && found_mac2ip[$f3]=$ip
done <<<"$nmap_output"
while read -r ip mac domain source destination; do
ip=${found_mac2ip[$mac]-$ip}
# ... DO BACKUP FOR $ip ...
done <'known.targets'
UPDATE: per comment from OP, dropping assumption (and associated code) about keeping an IP address that shows up in found.devices but without a match in known.targets (ie, this cannot happen)
Assumptions:
start with a list of IP/MAC addresses from known.targets
if a MAC address also shows up in found.devices then the IP address from found.devices takes precendence
Adding a standalone entry to both files:
$ cat known.targets
192.168.2.101 D4:XB:E4:FE:C6:6F domain source destination
192.168.2.102 B4:QB:Y4:FE:C6:6F domain source destination
192.168.2.103 B4:FB:P4:ZE:C6:6F domain source destination
192.168.2.104 B4:FB:E4:BE:P6:6F domain source destination
111.111.111.111 AA:BB:CC:DD:EE:FF domain source destination
$ cat found.devices
192.168.2.190 => D4:XB:E4:FE:C6:6F
192.168.2.102 => B4:QB:Y4:FE:C6:6F
192.168.2.200 => B4:FB:P4:ZE:C6:6F
192.168.2.104 => B4:FB:E4:BE:P6:6F
222.222.222.222 => FF:EE:CC:BB:AA:11
One awk idea:
$ cat ip.awk
FNR==NR { ip[$2]=$1; dsd[$2]=$3 FS $4 FS $5; next }
$3 in ip { ip[$3]=$1 }
END { for (mac in ip) print ip[mac],dsd[mac] }
Running against our files:
$ awk -f ip.awk known.targets found.devices
192.168.2.200 domain source destination
192.168.2.190 domain source destination
192.168.2.104 domain source destination
111.111.111.111 domain source destination
192.168.2.102 domain source destination
Feeding this to a while loop:
while read ip hostname source destination
do
echo "${ip} : ${hostname} : ${source} : ${destination}"
done < <(awk -f ip.awk known.targets found.devices)
This generates:
192.168.2.200 : domain : source : destination
192.168.2.190 : domain : source : destination
192.168.2.104 : domain : source : destination
111.111.111.111 : domain : source : destination
192.168.2.102 : domain : source : destination
I'm writing a bash script, which sets a fixed IP for an interface. I'd set the chosen IP with sudo ip addr change dev eth0 192.168.3.14/24.
For this I'll need to validate the user given CIDR IP and came across this perl command: perl -MNet::CIDR=cidrvalidate -e 'printf("%s\n", cidrvalidate($ARGV[0]) ? "valid" : "invalid")' -- 1.2.3.0/24
Now this would be a great one-liner for the bash script, but it only checks if it is a valid network, not if it's valid client IP on the network.
Bash-only solutions become rather extensive quickly, so I'd be fine to use perl or python for this.
I could not identify the appropriate perl command to check if the user entered a valid client IP (CIDR).
I started implementing a regex check in bash, but that became rather extensive quickly.
This perl command almost does the job perfectly, except it states client IPs on the network are "invalid".
perl -MNet::CIDR=cidrvalidate -e 'printf("%s\n", cidrvalidate($ARGV[0]) ? "valid" : "invalid")' -- 1.2.3.0/24
I'd expect the function to identify valid CIDR client IPs. For example:
127.0.0.1/32 = True
What perl/python/bash function can I use to check if a user define IP (CIDR) is a valid client IP?
edit: I've resorted to using ipcalc:
while true; do
read -p "Enter IP: " ip
ipcalc=`ipcalc ${ip}`
if [[ ${ipcalc} =~ "INVALID" ]]; then
echo "Invalid."
else
break
fi
done
See find in Net::CIDR::Lite.
perl -mNet::CIDR::Lite -E'
my $c = Net::CIDR::Lite->new;
$c->add("209.152.214.112/30");
$c->add("209.152.214.116/31");
$c->add("209.152.214.118/31");
for (qw(209.152.214.111 209.152.214.112)) {
say $c->find($_) ? "$_ valid" : "$_ invalid";
}
'
output
209.152.214.111 invalid
209.152.214.112 valid
I am trying to execute the following code in Haxe.
class File_Operations
{
public static function main()
{
Sys.command("ipconfig",[">","C:\\Users\\ila5\\Desktop\\Temp.txt"]);
}
}
However, I get the following error
Error: unrecognized or incomplete command line.
USAGE:
ipconfig [/allcompartments] [/? | /all |
/renew [adapter] | /release [adapter] |
/renew6 [adapter] | /release6 [adapter] |
/flushdns | /displaydns | /registerdns |
/showclassid adapter |
/setclassid adapter [classid] |
/showclassid6 adapter |
/setclassid6 adapter [classid] ]
where
adapter Connection name
(wildcard characters * and ? allowed, see examples)
Options:
/? Display this help message
/all Display full configuration information.
/release Release the IPv4 address for the specified adapter.
/release6 Release the IPv6 address for the specified adapter.
/renew Renew the IPv4 address for the specified adapter.
/renew6 Renew the IPv6 address for the specified adapter.
/flushdns Purges the DNS Resolver cache.
/registerdns Refreshes all DHCP leases and re-registers DNS names
/displaydns Display the contents of the DNS Resolver Cache.
/showclassid Displays all the dhcp class IDs allowed for adapter.
/setclassid Modifies the dhcp class id.
/showclassid6 Displays all the IPv6 DHCP class IDs allowed for adapter.
/setclassid6 Modifies the IPv6 DHCP class id.
The default is to display only the IP address, subnet mask and
default gateway for each adapter bound to TCP/IP.
For Release and Renew, if no adapter name is specified, then the IP address
leases for all adapters bound to TCP/IP will be released or renewed.
For Setclassid and Setclassid6, if no ClassId is specified, then the ClassId is removed.
Examples:
> ipconfig ... Show information
> ipconfig /all ... Show detailed information
> ipconfig /renew ... renew all adapters
> ipconfig /renew EL* ... renew any connection that has its
name starting with EL
> ipconfig /release *Con* ... release all matching connections,
eg. "Wired Ethernet Connection 1" or
"Wired Ethernet Connection 2"
> ipconfig /allcompartments ... Show information about all
compartments
> ipconfig /allcompartments /all ... Show detailed information about all
compartments
When I run the above command directly in cmd, it works well.
I would like to know how to redirect the output to a text file using Sys.command() in Haxe. Any ideas?
I think that ">" operator will be interpreted as an argument here (not as stdout redirection), but with Sys.command you can't avoid it.
What you can do is to read stdout of "ipconfig" command directly in haxe and save it as a file.
This sample code should work for you
var p = new Process("ipconfig", []);
var out:String = p.stdout.readAll().toString();
p.close();
File.saveContent("ipconfig.txt", out);
The goal was to frequently change default outgoing source ip on a machine with multiple interfaces and live ips.
I used ip route replace default as per its documentation and let a script run in loop for some interval. It changes source ip fine for a while but then all internet access to the machine is lost. It has to be remotely rebooted from a web interface to have any thing working
Is there any thing that could possibly prevent this from working stably. I have tried this on more than one servers?
Following is a minimum example
# extract all currently active source ips except loopback
IPs="$(ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 |
awk '{ print $1}')"
read -a ip_arr <<<$IPs
# extract all currently active mac / ethernet addresses
Int="$(ifconfig | grep 'eth'| grep -v 'lo' | awk '{print $1}')"
read -a eth_arr <<<$Int
ip_len=${#ip_arr[#]}
eth_len=${#eth_arr[#]}
i=0;
e=0;
while(true); do
#ip route replace 0.0.0.0 dev eth0:1 src 192.168.1.18
route_cmd="ip route replace 0.0.0.0 dev ${eth_arr[e]} src ${ip_arr[i]}"
echo $route_cmd
eval $route_cmd
sleep 300
(i++)
(e++)
if [ $i -eq $ip_len ]; then
i=0;
e=0;
echo "all ips exhausted - starting from first again"
# break;
fi
done
I wanted to comment, but as I'm not having enough points, it won't let me.
Consider:
Does varying the delay time before its run again change the number of iterations before it fails?
Exporting the ifconfig & routes every time you change it, to see if something is meaningfully different over time. Maybe some basic tests to it (ping, nslookup, etc) Basically, find what is exactly going wrong with it. Also exporting the commands you send to a logfile (text file per change?) to see changes in them to see if some is different after x iterations.
What connectivity is lost? Incoming? Outgoing? Specific applications?
You say you use/do this on other servers without problems?
Are the IP's: Static (/etc/network/interfaces), bootp/DHCP, semi-static (bootp/DHCP server serving, based on MAC address), and if served by bootp/DHCP, what is the lease duration?
On the last remark:
bootp/dhcp will give IP's for x duration. say its 60 minutes. After half that time it will "check" with the bootp/dhcp server if it can keep the IP, and extend the lease to 60 minutes again, this can mean a small reconfig on the ifconfig (maybe even at the same time of your script?).
hth
I would like to send trap and specify clientaddress
As I search there is two ways:
edit /etc/snmp/snmp.conf and set: clientaddr [IP_OF_DEVICE]
specify IP as parameter: --clientAddr="[IP_OF_DEVICE]"
When i try to issue command:
snmptrap -v 3 -l noAuthNoPriv -u SomeUser -n "" AGENT_IP .1.3.6.1.4.1.161.5.2 .1.3.6.1.4.1.161.1.2.3.4 5
It gives an error
getaddrinfo(AGENT_IP, NULL, ...): Address family for hostname not supported
When I not specify clientadress it works as expected but it use IP of the machine where I issed a command as a client IP
To get rid of this I have to:
Define virtual interface for ip of device which you want to simulate
Specify protocol of agent ( by default when I set clientaddr in /etc/snmp/snmp.conf it looks like it tried to use IPv6 for agent )
snmptrap -v 3 -l noAuthNoPriv -u SomeUser -n "" udp:AGENT_IP ...