diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-04-24 21:56:51 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-04-28 17:32:35 +0200 |
| commit | 35a6b10c1bc488ca195e9c641563c29251f725f3 (patch) | |
| tree | 60e24b067eb7658e3b7f355eb268b0732f80af22 /src | |
| parent | c2da6d7774aa9c2629d168f6d27be7797970d7a2 (diff) | |
src: add netmap support
This patch allows you to specify an interval of IP address in maps.
table ip x {
chain y {
type nat hook postrouting priority srcnat; policy accept;
snat ip prefix to ip saddr map { 10.141.11.0/24 : 192.168.2.0/24 }
}
}
The example above performs SNAT to packets that comes from
10.141.11.0/24 using the prefix 192.168.2.0/24, e.g. 10.141.11.4 is
mangled to 192.168.2.4.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/netlink_delinearize.c | 4 | ||||
| -rw-r--r-- | src/parser_bison.y | 17 | ||||
| -rw-r--r-- | src/statement.c | 2 |
3 files changed, 23 insertions, 0 deletions
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c index f41223a8..b039a1e3 100644 --- a/src/netlink_delinearize.c +++ b/src/netlink_delinearize.c @@ -15,6 +15,7 @@ #include <limits.h> #include <linux/netfilter/nf_tables.h> #include <arpa/inet.h> +#include <linux/netfilter/nf_nat.h> #include <linux/netfilter.h> #include <net/ethernet.h> #include <netlink.h> @@ -1060,6 +1061,9 @@ static void netlink_parse_nat(struct netlink_parse_ctx *ctx, if (nftnl_expr_is_set(nle, NFTNL_EXPR_NAT_FLAGS)) stmt->nat.flags = nftnl_expr_get_u32(nle, NFTNL_EXPR_NAT_FLAGS); + if (stmt->nat.flags & NF_NAT_RANGE_NETMAP) + stmt->nat.type_flags |= STMT_NAT_F_PREFIX; + addr = NULL; reg1 = netlink_parse_register(nle, NFTNL_EXPR_NAT_REG_ADDR_MIN); if (reg1) { diff --git a/src/parser_bison.y b/src/parser_bison.y index 731a5b3e..3b470cc6 100644 --- a/src/parser_bison.y +++ b/src/parser_bison.y @@ -3205,6 +3205,23 @@ nat_stmt_args : stmt_expr $<stmt>0->nat.addr = $3; $<stmt>0->nat.type_flags = STMT_NAT_F_INTERVAL; } + | nf_key_proto PREFIX TO stmt_expr + { + $<stmt>0->nat.family = $1; + $<stmt>0->nat.addr = $4; + $<stmt>0->nat.type_flags = + STMT_NAT_F_PREFIX | + STMT_NAT_F_INTERVAL; + $<stmt>0->nat.flags |= NF_NAT_RANGE_NETMAP; + } + | PREFIX TO stmt_expr + { + $<stmt>0->nat.addr = $3; + $<stmt>0->nat.type_flags = + STMT_NAT_F_PREFIX | + STMT_NAT_F_INTERVAL; + $<stmt>0->nat.flags |= NF_NAT_RANGE_NETMAP; + } ; masq_stmt : masq_stmt_alloc masq_stmt_args diff --git a/src/statement.c b/src/statement.c index 5bbc0540..8a1cd6e0 100644 --- a/src/statement.c +++ b/src/statement.c @@ -609,6 +609,8 @@ static void nat_stmt_print(const struct stmt *stmt, struct output_ctx *octx) if (stmt->nat.ipportmap) nft_print(octx, " addr . port"); + else if (stmt->nat.type_flags & STMT_NAT_F_PREFIX) + nft_print(octx, " prefix"); else if (stmt->nat.type_flags & STMT_NAT_F_INTERVAL) nft_print(octx, " interval"); |