From 53bcd4b1ab73770b2cd1a5fe27aa2dd3314794bc Mon Sep 17 00:00:00 2001 From: Fabian Homborg Date: Wed, 5 Aug 2015 17:41:14 +0200 Subject: [PATCH] Add iptables completion This is far from perfect, but I need to gather more feedback. --- share/completions/iptables.fish | 151 ++++++++++++++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 share/completions/iptables.fish diff --git a/share/completions/iptables.fish b/share/completions/iptables.fish new file mode 100644 index 000000000..1e6bdabf3 --- /dev/null +++ b/share/completions/iptables.fish @@ -0,0 +1,151 @@ +set -l __fish_iptables_tables filter nat mangle raw security + +function __fish_iptables_current_table + set -l next_is_table 1 + for token in (commandline -oc) + switch $token + case "--table=*" + set -l IFS "=" + echo $token | while read a b + echo $b + end + return 0 + case "--table" + set next_is_table 0 + case "-*t*" + set next_is_table 0 + case "*" + if [ $next_is_table -eq 0 ] + echo $token + return 0 + end + end + end + return 1 +end + +function __fish_iptables_user_chains + # There can be user-defined chains so we need iptables' help + set -l tablearg + set -l table (__fish_iptables_current_table) + if __fish_iptables_current_table + set tablearg "--table=$table" + end + # This only works as root, so ignore errors + iptables $tablearg -L ^/dev/null | grep Chain | while read a b c + echo $b + end +end + + +function __fish_iptables_chains + set -l table (__fish_iptables_current_table) + [ -z $table ]; and set -l table "*" + set -l prerouting "PREROUTING For packets that are coming in" + set -l input "INPUT For packets destined to local sockets" + set -l output "OUTPUT For locally-generated packets" + set -l forward "FORWARD For packets being routed through" + set -l postrouting "POSTROUTING For packets that are about to go out" + switch $table + case "filter" + echo $input + echo $forward + echo $output + case "nat" + echo $prerouting + echo $output + echo $postrouting + case "mangle" + echo $prerouting + echo $input + echo $output + echo $forward + echo $postrouting + case "raw" + echo $prerouting + echo $output + case "security" + echo $input + echo $output + echo $forward + case '*' + echo $prerouting + echo $input + echo $output + echo $forward + echo $postrouting + end + __fish_iptables_user_chains +end + +function __fish_iptables_has_chain + # Remove descriptions + set -l IFS " " + set -l chains (__fish_iptables_chains | while read a b; echo $a; end) + set -e IFS + set -l cmdline (commandline -op) + for c in $chains + if contains -- $c $cmdline + return 0 + end + end + return 1 +end + +# A target is a user-defined chain, one of "ACCEPT DROP RETURN" or an extension (TODO) +function __fish_iptables_targets + echo "ACCEPT" + echo "DROP" + echo "RETURN" + __fish_iptables_chains +end + +### Commands +complete -c iptables -s A -l append --description 'Append rules to the end of a chain' -a '(__fish_iptables_chains)' -f +complete -c iptables -s C -l check --description 'Check whether a matching rule exists in a chain' -a '(__fish_iptables_chains)' -f +complete -c iptables -s D -l delete --description 'Delete rules from a chain' -a '(__fish_iptables_chains)' -f +# Rulespec is match (can't complete that) and then a target +# TODO: This is only valid for some options, as others need a rulenum first or no rulespec at all +complete -c iptables -n '__fish_contains_opt -s A -s C -s D append check delete; and __fish_iptables_has_chain' -s j -l jump --description 'Specify the target of a rule' -f -a\ +'(__fish_iptables_targets)' + +complete -c iptables -n '__fish_contains_opt -s A -s C -s D append check delete; and __fish_iptables_has_chain' -s m -l match --description 'Specify a match to use' -f +complete -c iptables -n '__fish_iptables_has_chain' -a 'ACCEPT DROP RETURN' -f +complete -c iptables -n '__fish_iptables_has_chain' -a '( __fish_iptables_user_chains)' -f +complete -c iptables -s I -l insert --description 'Insert rules in the beginning of a chain' -a '(__fish_iptables_chains)' -f +complete -c iptables -s R -l replace --description 'Replace a rule in a chain' -a '(__fish_iptables_chains)' -f +complete -c iptables -s L -l list --description 'List all rules in a chain' -a '(__fish_iptables_chains)' -f +complete -c iptables -s S -l list-rules --description 'Print all rules in a chain.' -a '(__fish_iptables_chains)' -f +complete -c iptables -s F -l flush --description 'Delete ALL rules in a chain' -a '(__fish_iptables_chains)' -f +complete -c iptables -s Z -l zero --description 'Zero the packet and byte counters in chains' -a '(__fish_iptables_chains)' -f +complete -c iptables -s N -l new-chain --description 'Create a new user-defined chain by the given name' -a '(__fish_iptables_chains)' -f +complete -c iptables -s X -l delete-chain --description 'Delete the optional user-defined chain specified' -a '(__fish_iptables_chains)' -f +complete -c iptables -s P -l policy --description 'Set the policy for the chain to the given target' -a '(__fish_iptables_chains)' -f +complete -c iptables -s E -l rename-chain --description 'Rename the user specified chain to the user supplied name' -a '(__fish_iptables_chains)' -f +complete -c iptables -s h --description 'Help' -f + +complete -c iptables -s p -l protocol --description 'The protocol of the rule or of the packet to check' -f +complete -c iptables -s s -l source --description 'Source specification' -f +complete -c iptables -s d -l destination --description 'Destination specification' -f +complete -c iptables -s j -l jump --description 'Specify the target of a rule' -f +complete -c iptables -s i -l in-interface --description 'Interface via which a packet was received' -f +complete -c iptables -s o -l out-interface --description 'Interface via which packet is to be sent' -f +complete -c iptables -s f -l fragment --description 'Rule only refers to second and further ipv4 fragments' -f +complete -c iptables -s c -l set-counters --description 'Initialize packet and byte counters of a rule' -f +complete -c iptables -s v -l verbose --description 'Verbose output' -f +complete -c iptables -s w -l wait --description 'Wait for the xtables lock' -f +complete -c iptables -s n -l numeric --description 'Numeric output' -f +complete -c iptables -s x -l exact --description 'Expand numbers' -f +complete -c iptables -l line-numbers --description 'When listing rules, add line numbers' -f +complete -c iptables -s t -l table --description 'The table to operate on' -a "$__fish_iptables_tables" -f + +# Options that take files +complete -c iptables -l modprobe --description 'Use this command to load modules' -r + +# I don't get these +# complete -c iptables -s 4 -l ipv4 --description 'This option has no effect in iptables and iptables-restore.' -f +# complete -c iptables -s 6 -l ipv6 --description 'If a rule using the -6 option is inserted with … [See Man Page]' -f +# complete -c iptables -s g -l goto --description '' -f + +# Should aliased options be in the completion? +# complete -c iptables -l dst --description 'Alias for -d' -f