src: add support for base hook dumping

Example output:
$ nft list hook ip input
family ip hook input {
        +0000000000 nft_do_chain_inet [nf_tables]       # nft table ip filter chain input
        +0000000010 nft_do_chain_inet [nf_tables]       # nft table ip firewalld chain filter_INPUT
        +0000000100 nf_nat_ipv4_local_in [nf_nat]
        +2147483647 ipv4_confirm [nf_conntrack]
}

$ nft list hooks netdev type ingress device lo
family netdev hook ingress device lo {
        +0000000000 nft_do_chain_netdev [nf_tables]
}

$ nft list hooks inet
family ip hook prerouting {
        -0000000400 ipv4_conntrack_defrag [nf_defrag_ipv4]
        -0000000300 iptable_raw_hook [iptable_raw]
        -0000000290 nft_do_chain_inet [nf_tables]       # nft table ip firewalld chain raw_PREROUTING
        -0000000200 ipv4_conntrack_in [nf_conntrack]
        -0000000140 nft_do_chain_inet [nf_tables]       # nft table ip firewalld chain mangle_PREROUTING
        -0000000100 nf_nat_ipv4_pre_routing [nf_nat]
}
...

'nft list hooks' will display everyting except the netdev family
via successive dump request for all family:hook combinations.

Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/scanner.l b/src/scanner.l
index c1bc21aa..6dc1be89 100644
--- a/src/scanner.l
+++ b/src/scanner.l
@@ -354,6 +354,7 @@ addrstring	({macaddr}|{ip4addr}|{ip6addr})
 	"limits"		{ return LIMITS; }
 	"secmarks"		{ return SECMARKS; }
 	"synproxys"		{ return SYNPROXYS; }
+	"hooks"			{ return HOOKS; }
 }
 
 "counter"		{ scanner_push_start_cond(yyscanner, SCANSTATE_COUNTER); return COUNTER; }