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@@ -19,100 +19,11 @@
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
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-MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>");
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+MODULE_AUTHOR("Jan Engelhardt <jengelh@medozas.de>");
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MODULE_DESCRIPTION("Xtables: connection tracking state match");
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MODULE_ALIAS("ipt_conntrack");
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MODULE_ALIAS("ip6t_conntrack");
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-static bool
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-conntrack_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
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-{
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- const struct xt_conntrack_info *sinfo = par->matchinfo;
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- const struct nf_conn *ct;
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- enum ip_conntrack_info ctinfo;
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- unsigned int statebit;
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-
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- ct = nf_ct_get(skb, &ctinfo);
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-
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-#define FWINV(bool, invflg) ((bool) ^ !!(sinfo->invflags & (invflg)))
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-
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- if (ct == &nf_conntrack_untracked)
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- statebit = XT_CONNTRACK_STATE_UNTRACKED;
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- else if (ct)
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- statebit = XT_CONNTRACK_STATE_BIT(ctinfo);
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- else
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- statebit = XT_CONNTRACK_STATE_INVALID;
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-
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- if (sinfo->flags & XT_CONNTRACK_STATE) {
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- if (ct) {
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- if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
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- statebit |= XT_CONNTRACK_STATE_SNAT;
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- if (test_bit(IPS_DST_NAT_BIT, &ct->status))
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- statebit |= XT_CONNTRACK_STATE_DNAT;
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- }
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- if (FWINV((statebit & sinfo->statemask) == 0,
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- XT_CONNTRACK_STATE))
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- return false;
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- }
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-
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- if (ct == NULL) {
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- if (sinfo->flags & ~XT_CONNTRACK_STATE)
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- return false;
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- return true;
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- }
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-
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- if (sinfo->flags & XT_CONNTRACK_PROTO &&
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- FWINV(nf_ct_protonum(ct) !=
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- sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
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- XT_CONNTRACK_PROTO))
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- return false;
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-
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- if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
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- FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip &
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- sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
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- sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
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- XT_CONNTRACK_ORIGSRC))
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- return false;
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-
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- if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
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- FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip &
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- sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
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- sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
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- XT_CONNTRACK_ORIGDST))
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- return false;
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-
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- if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
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- FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip &
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- sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
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- sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
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- XT_CONNTRACK_REPLSRC))
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- return false;
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-
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- if (sinfo->flags & XT_CONNTRACK_REPLDST &&
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- FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip &
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- sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
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- sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
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- XT_CONNTRACK_REPLDST))
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- return false;
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-
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- if (sinfo->flags & XT_CONNTRACK_STATUS &&
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- FWINV((ct->status & sinfo->statusmask) == 0,
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- XT_CONNTRACK_STATUS))
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- return false;
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-
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- if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
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- unsigned long expires = timer_pending(&ct->timeout) ?
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- (ct->timeout.expires - jiffies)/HZ : 0;
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-
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- if (FWINV(!(expires >= sinfo->expires_min &&
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- expires <= sinfo->expires_max),
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- XT_CONNTRACK_EXPIRES))
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- return false;
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- }
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- return true;
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-#undef FWINV
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-}
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-
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static bool
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conntrack_addrcmp(const union nf_inet_addr *kaddr,
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const union nf_inet_addr *uaddr,
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@@ -337,71 +248,7 @@ static void conntrack_mt_destroy_v1(const struct xt_mtdtor_param *par)
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conntrack_mt_destroy(par);
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}
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-#ifdef CONFIG_COMPAT
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-struct compat_xt_conntrack_info
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-{
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- compat_uint_t statemask;
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- compat_uint_t statusmask;
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- struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
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- struct in_addr sipmsk[IP_CT_DIR_MAX];
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- struct in_addr dipmsk[IP_CT_DIR_MAX];
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- compat_ulong_t expires_min;
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- compat_ulong_t expires_max;
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- u_int8_t flags;
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- u_int8_t invflags;
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-};
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-
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-static void conntrack_mt_compat_from_user_v0(void *dst, void *src)
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-{
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- const struct compat_xt_conntrack_info *cm = src;
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- struct xt_conntrack_info m = {
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- .statemask = cm->statemask,
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- .statusmask = cm->statusmask,
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- .expires_min = cm->expires_min,
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- .expires_max = cm->expires_max,
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- .flags = cm->flags,
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- .invflags = cm->invflags,
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- };
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- memcpy(m.tuple, cm->tuple, sizeof(m.tuple));
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- memcpy(m.sipmsk, cm->sipmsk, sizeof(m.sipmsk));
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- memcpy(m.dipmsk, cm->dipmsk, sizeof(m.dipmsk));
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- memcpy(dst, &m, sizeof(m));
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-}
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-
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-static int conntrack_mt_compat_to_user_v0(void __user *dst, void *src)
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-{
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- const struct xt_conntrack_info *m = src;
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- struct compat_xt_conntrack_info cm = {
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- .statemask = m->statemask,
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- .statusmask = m->statusmask,
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- .expires_min = m->expires_min,
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- .expires_max = m->expires_max,
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- .flags = m->flags,
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- .invflags = m->invflags,
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- };
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- memcpy(cm.tuple, m->tuple, sizeof(cm.tuple));
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- memcpy(cm.sipmsk, m->sipmsk, sizeof(cm.sipmsk));
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- memcpy(cm.dipmsk, m->dipmsk, sizeof(cm.dipmsk));
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- return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
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-}
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-#endif
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-
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static struct xt_match conntrack_mt_reg[] __read_mostly = {
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- {
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- .name = "conntrack",
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- .revision = 0,
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- .family = NFPROTO_IPV4,
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- .match = conntrack_mt_v0,
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- .checkentry = conntrack_mt_check,
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- .destroy = conntrack_mt_destroy,
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- .matchsize = sizeof(struct xt_conntrack_info),
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- .me = THIS_MODULE,
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-#ifdef CONFIG_COMPAT
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- .compatsize = sizeof(struct compat_xt_conntrack_info),
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- .compat_from_user = conntrack_mt_compat_from_user_v0,
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- .compat_to_user = conntrack_mt_compat_to_user_v0,
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-#endif
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- },
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{
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.name = "conntrack",
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.revision = 1,
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