diff options
Diffstat (limited to 'extensions/libxt_udp.c')
-rw-r--r-- | extensions/libxt_udp.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/extensions/libxt_udp.c b/extensions/libxt_udp.c index b9f39ee4..0c7a4bc2 100644 --- a/extensions/libxt_udp.c +++ b/extensions/libxt_udp.c @@ -152,6 +152,44 @@ static void udp_save(const void *ip, const struct xt_entry_match *match) } } +static int udp_xlate(struct xt_xlate *xl, + const struct xt_xlate_mt_params *params) +{ + const struct xt_udp *udpinfo = (struct xt_udp *)params->match->data; + char *space= ""; + + if (udpinfo->spts[0] != 0 || udpinfo->spts[1] != 0xFFFF) { + if (udpinfo->spts[0] != udpinfo->spts[1]) { + xt_xlate_add(xl,"udp sport %s%u-%u", + udpinfo->invflags & XT_UDP_INV_SRCPT ? + "!= ": "", + udpinfo->spts[0], udpinfo->spts[1]); + } else { + xt_xlate_add(xl, "udp sport %s%u", + udpinfo->invflags & XT_UDP_INV_SRCPT ? + "!= ": "", + udpinfo->spts[0]); + } + space = " "; + } + + if (udpinfo->dpts[0] != 0 || udpinfo->dpts[1] != 0xFFFF) { + if (udpinfo->dpts[0] != udpinfo->dpts[1]) { + xt_xlate_add(xl,"%sudp dport %s%u-%u", space, + udpinfo->invflags & XT_UDP_INV_SRCPT ? + "!= ": "", + udpinfo->dpts[0], udpinfo->dpts[1]); + } else { + xt_xlate_add(xl,"%sudp dport %s%u", space, + udpinfo->invflags & XT_UDP_INV_SRCPT ? + "!= ": "", + udpinfo->dpts[0]); + } + } + + return 1; +} + static struct xtables_match udp_match = { .family = NFPROTO_UNSPEC, .name = "udp", @@ -164,6 +202,7 @@ static struct xtables_match udp_match = { .save = udp_save, .x6_parse = udp_parse, .x6_options = udp_opts, + .xlate = udp_xlate, }; void |