| Message ID | 20160302095749.GA6686@gmail.com |
|---|---|
| State | Accepted |
| Delegated to: | Pablo Neira |
| Headers | show |
On Wed, Mar 02, 2016 at 03:27:49PM +0530, Shivani Bhardwaj wrote: > Add translation for masquerade to nftables. > > Examples: > > $ sudo iptables-translate -t nat -A POSTROUTING -j MASQUERADE > nft add rule ip nat POSTROUTING counter masquerade > > $ sudo iptables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --to-ports 10 > nft add rule ip nat POSTROUTING ip protocol tcp counter masquerade to :10 > > $ sudo iptables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --to-ports 10-20 --random > nft add rule ip nat POSTROUTING ip protocol tcp counter masquerade to :10-20 random Applied, thanks Shivani. > > Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com> > --- > Changes in v2: > Add code for masquerade port range selection > > extensions/libipt_MASQUERADE.c | 24 ++++++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/extensions/libipt_MASQUERADE.c b/extensions/libipt_MASQUERADE.c > index ea07445..d1393c1 100644 > --- a/extensions/libipt_MASQUERADE.c > +++ b/extensions/libipt_MASQUERADE.c > @@ -134,6 +134,29 @@ MASQUERADE_save(const void *ip, const struct xt_entry_target *target) > printf(" --random"); > } > > +static int > +MASQUERADE_xlate(const struct xt_entry_target *target, > + struct xt_xlate *xl, int numeric) > +{ > + const struct nf_nat_ipv4_multi_range_compat *mr = > + (const void *)target->data; > + const struct nf_nat_ipv4_range *r = &mr->range[0]; > + > + xt_xlate_add(xl, "masquerade"); > + > + if (r->flags & NF_NAT_RANGE_PROTO_SPECIFIED) { > + xt_xlate_add(xl, " to :%hu", ntohs(r->min.tcp.port)); > + if (r->max.tcp.port != r->min.tcp.port) > + xt_xlate_add(xl, "-%hu", ntohs(r->max.tcp.port)); > + } ^^^ I have fixed this minor glitch here. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/extensions/libipt_MASQUERADE.c b/extensions/libipt_MASQUERADE.c index ea07445..d1393c1 100644 --- a/extensions/libipt_MASQUERADE.c +++ b/extensions/libipt_MASQUERADE.c @@ -134,6 +134,29 @@ MASQUERADE_save(const void *ip, const struct xt_entry_target *target) printf(" --random"); } +static int +MASQUERADE_xlate(const struct xt_entry_target *target, + struct xt_xlate *xl, int numeric) +{ + const struct nf_nat_ipv4_multi_range_compat *mr = + (const void *)target->data; + const struct nf_nat_ipv4_range *r = &mr->range[0]; + + xt_xlate_add(xl, "masquerade"); + + if (r->flags & NF_NAT_RANGE_PROTO_SPECIFIED) { + xt_xlate_add(xl, " to :%hu", ntohs(r->min.tcp.port)); + if (r->max.tcp.port != r->min.tcp.port) + xt_xlate_add(xl, "-%hu", ntohs(r->max.tcp.port)); + } + + xt_xlate_add(xl, " "); + if (r->flags & NF_NAT_RANGE_PROTO_RANDOM) + xt_xlate_add(xl, "random "); + + return 1; +} + static struct xtables_target masquerade_tg_reg = { .name = "MASQUERADE", .version = XTABLES_VERSION, @@ -146,6 +169,7 @@ static struct xtables_target masquerade_tg_reg = { .print = MASQUERADE_print, .save = MASQUERADE_save, .x6_options = MASQUERADE_opts, + .xlate = MASQUERADE_xlate, }; void _init(void)
Add translation for masquerade to nftables. Examples: $ sudo iptables-translate -t nat -A POSTROUTING -j MASQUERADE nft add rule ip nat POSTROUTING counter masquerade $ sudo iptables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --to-ports 10 nft add rule ip nat POSTROUTING ip protocol tcp counter masquerade to :10 $ sudo iptables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --to-ports 10-20 --random nft add rule ip nat POSTROUTING ip protocol tcp counter masquerade to :10-20 random Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com> --- Changes in v2: Add code for masquerade port range selection extensions/libipt_MASQUERADE.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)