@@ -48,6 +48,12 @@ struct ct_endpoint {
* hashing in ct_endpoint_hash_add(). */
BUILD_ASSERT_DECL(sizeof(struct ct_endpoint) == sizeof(union ct_addr) + 4);
+enum key_dir {
+ CT_DIR_FWD = 0,
+ CT_DIR_REV,
+ CT_DIRS,
+};
+
/* Changes to this structure need to be reflected in conn_key_hash()
* and conn_key_cmp(). */
struct conn_key {
@@ -86,21 +92,19 @@ struct alg_exp_node {
bool nat_rpl_dst;
};
-enum OVS_PACKED_ENUM ct_conn_type {
- CT_CONN_TYPE_DEFAULT,
- CT_CONN_TYPE_UN_NAT,
+struct conn_key_node {
+ enum key_dir dir;
+ struct conn_key key;
+ struct cmap_node cm_node;
};
struct conn {
/* Immutable data. */
- struct conn_key key;
- struct conn_key rev_key;
+ struct conn_key_node key_node[CT_DIRS];
struct conn_key parent_key; /* Only used for orig_tuple support. */
struct ovs_list exp_node;
- struct cmap_node cm_node;
uint16_t nat_action;
char *alg;
- struct conn *nat_conn; /* The NAT 'conn' context, if there is one. */
/* Mutable data. */
struct ovs_mutex lock; /* Guards all mutable fields. */
@@ -120,7 +124,6 @@ struct conn {
/* Immutable data. */
bool alg_related; /* True if alg data connection. */
- enum ct_conn_type conn_type;
uint32_t tp_id; /* Timeout policy ID. */
};
@@ -276,7 +276,8 @@ conn_update_expiration(struct conntrack *ct, struct conn *conn,
ovs_mutex_lock(&conn->lock);
VLOG_DBG_RL(&rl, "Update timeout %s zone=%u with policy id=%d "
"val=%u sec.",
- ct_timeout_str[tm], conn->key.zone, conn->tp_id, val);
+ ct_timeout_str[tm], conn->key_node[CT_DIR_FWD].key.zone,
+ conn->tp_id, val);
conn_update_expiration__(ct, conn, tm, now, val);
}
@@ -307,7 +308,8 @@ conn_init_expiration(struct conntrack *ct, struct conn *conn,
}
VLOG_DBG_RL(&rl, "Init timeout %s zone=%u with policy id=%d val=%u sec.",
- ct_timeout_str[tm], conn->key.zone, conn->tp_id, val);
+ ct_timeout_str[tm], conn->key_node[CT_DIR_FWD].key.zone,
+ conn->tp_id, val);
conn_init_expiration__(ct, conn, tm, now, val);
}
@@ -96,12 +96,11 @@ static struct conn *new_conn(struct conntrack *ct, struct dp_packet *pkt,
uint32_t tp_id);
static void delete_conn__(struct conn *);
static void delete_conn(struct conn *);
-static void delete_conn_one(struct conn *conn);
static enum ct_update_res conn_update(struct conntrack *ct, struct conn *conn,
struct dp_packet *pkt,
struct conn_lookup_ctx *ctx,
long long now);
-static bool conn_expired(struct conn *, long long now);
+static bool conn_expired(const struct conn *, long long now);
static void set_mark(struct dp_packet *, struct conn *,
uint32_t val, uint32_t mask);
static void set_label(struct dp_packet *, struct conn *,
@@ -110,8 +109,7 @@ static void set_label(struct dp_packet *, struct conn *,
static void *clean_thread_main(void *f_);
static bool
-nat_get_unique_tuple(struct conntrack *ct, const struct conn *conn,
- struct conn *nat_conn,
+nat_get_unique_tuple(struct conntrack *ct, struct conn *conn,
const struct nat_action_info_t *nat_info);
static uint8_t
@@ -205,7 +203,7 @@ static alg_helper alg_helpers[] = {
#define ALG_WC_SRC_PORT 0
/* If the total number of connections goes above this value, no new connections
- * are accepted; this is for CT_CONN_TYPE_DEFAULT connections. */
+ * are accepted. */
#define DEFAULT_N_CONN_LIMIT 3000000
/* Does a member by member comparison of two conn_keys; this
@@ -231,61 +229,6 @@ conn_key_cmp(const struct conn_key *key1, const struct conn_key *key2)
return 1;
}
-static void
-ct_print_conn_info(const struct conn *c, const char *log_msg,
- enum vlog_level vll, bool force, bool rl_on)
-{
-#define CT_VLOG(RL_ON, LEVEL, ...) \
- do { \
- if (RL_ON) { \
- static struct vlog_rate_limit rl_ = VLOG_RATE_LIMIT_INIT(5, 5); \
- vlog_rate_limit(&this_module, LEVEL, &rl_, __VA_ARGS__); \
- } else { \
- vlog(&this_module, LEVEL, __VA_ARGS__); \
- } \
- } while (0)
-
- if (OVS_UNLIKELY(force || vlog_is_enabled(&this_module, vll))) {
- if (c->key.dl_type == htons(ETH_TYPE_IP)) {
- CT_VLOG(rl_on, vll, "%s: src ip "IP_FMT" dst ip "IP_FMT" rev src "
- "ip "IP_FMT" rev dst ip "IP_FMT" src/dst ports "
- "%"PRIu16"/%"PRIu16" rev src/dst ports "
- "%"PRIu16"/%"PRIu16" zone/rev zone "
- "%"PRIu16"/%"PRIu16" nw_proto/rev nw_proto "
- "%"PRIu8"/%"PRIu8, log_msg,
- IP_ARGS(c->key.src.addr.ipv4),
- IP_ARGS(c->key.dst.addr.ipv4),
- IP_ARGS(c->rev_key.src.addr.ipv4),
- IP_ARGS(c->rev_key.dst.addr.ipv4),
- ntohs(c->key.src.port), ntohs(c->key.dst.port),
- ntohs(c->rev_key.src.port), ntohs(c->rev_key.dst.port),
- c->key.zone, c->rev_key.zone, c->key.nw_proto,
- c->rev_key.nw_proto);
- } else {
- char ip6_s[INET6_ADDRSTRLEN];
- inet_ntop(AF_INET6, &c->key.src.addr.ipv6, ip6_s, sizeof ip6_s);
- char ip6_d[INET6_ADDRSTRLEN];
- inet_ntop(AF_INET6, &c->key.dst.addr.ipv6, ip6_d, sizeof ip6_d);
- char ip6_rs[INET6_ADDRSTRLEN];
- inet_ntop(AF_INET6, &c->rev_key.src.addr.ipv6, ip6_rs,
- sizeof ip6_rs);
- char ip6_rd[INET6_ADDRSTRLEN];
- inet_ntop(AF_INET6, &c->rev_key.dst.addr.ipv6, ip6_rd,
- sizeof ip6_rd);
-
- CT_VLOG(rl_on, vll, "%s: src ip %s dst ip %s rev src ip %s"
- " rev dst ip %s src/dst ports %"PRIu16"/%"PRIu16
- " rev src/dst ports %"PRIu16"/%"PRIu16" zone/rev zone "
- "%"PRIu16"/%"PRIu16" nw_proto/rev nw_proto "
- "%"PRIu8"/%"PRIu8, log_msg, ip6_s, ip6_d, ip6_rs,
- ip6_rd, ntohs(c->key.src.port), ntohs(c->key.dst.port),
- ntohs(c->rev_key.src.port), ntohs(c->rev_key.dst.port),
- c->key.zone, c->rev_key.zone, c->key.nw_proto,
- c->rev_key.nw_proto);
- }
- }
-}
-
/* Initializes the connection tracker 'ct'. The caller is responsible for
* calling 'conntrack_destroy()', when the instance is not needed anymore */
struct conntrack *
@@ -447,23 +390,24 @@ static void
conn_clean(struct conntrack *ct, struct conn *conn)
OVS_REQUIRES(ct->ct_lock)
{
- ovs_assert(conn->conn_type == CT_CONN_TYPE_DEFAULT);
+ uint32_t hash;
if (conn->alg) {
- expectation_clean(ct, &conn->key);
+ expectation_clean(ct, &conn->key_node[CT_DIR_FWD].key);
}
- uint32_t hash = conn_key_hash(&conn->key, ct->hash_basis);
- cmap_remove(&ct->conns, &conn->cm_node, hash);
+ hash = conn_key_hash(&conn->key_node[CT_DIR_FWD].key, ct->hash_basis);
+ cmap_remove(&ct->conns, &conn->key_node[CT_DIR_FWD].cm_node, hash);
struct zone_limit *zl = zone_limit_lookup(ct, conn->admit_zone);
if (zl && zl->czl.zone_limit_seq == conn->zone_limit_seq) {
zl->czl.count--;
}
- if (conn->nat_conn) {
- hash = conn_key_hash(&conn->nat_conn->key, ct->hash_basis);
- cmap_remove(&ct->conns, &conn->nat_conn->cm_node, hash);
+ if (conn->nat_action) {
+ hash = conn_key_hash(&conn->key_node[CT_DIR_REV].key,
+ ct->hash_basis);
+ cmap_remove(&ct->conns, &conn->key_node[CT_DIR_REV].cm_node, hash);
}
ovs_list_remove(&conn->exp_node);
conn->cleaned = true;
@@ -477,15 +421,18 @@ conn_clean(struct conntrack *ct, struct conn *conn)
void
conntrack_destroy(struct conntrack *ct)
{
+ struct conn_key_node *keyn;
struct conn *conn;
latch_set(&ct->clean_thread_exit);
pthread_join(ct->clean_thread, NULL);
latch_destroy(&ct->clean_thread_exit);
ovs_mutex_lock(&ct->ct_lock);
- CMAP_FOR_EACH (conn, cm_node, &ct->conns) {
- if (conn->conn_type != CT_CONN_TYPE_DEFAULT) {
- continue;
+ CMAP_FOR_EACH (keyn, cm_node, &ct->conns) {
+ if (keyn->dir == CT_DIR_FWD) {
+ conn = CONTAINER_OF(keyn, struct conn, key_node[CT_DIR_FWD]);
+ } else {
+ conn = CONTAINER_OF(keyn, struct conn, key_node[CT_DIR_REV]);
}
conn_clean(ct, conn);
@@ -527,31 +474,39 @@ conn_key_lookup(struct conntrack *ct, const struct conn_key *key,
uint32_t hash, long long now, struct conn **conn_out,
bool *reply)
{
- struct conn *conn;
+ struct conn_key_node *keyn;
+ struct conn *conn = NULL;
bool found = false;
- CMAP_FOR_EACH_WITH_HASH (conn, cm_node, hash, &ct->conns) {
- if (!conn_key_cmp(&conn->key, key) && !conn_expired(conn, now)) {
- found = true;
- if (reply) {
- *reply = false;
- }
- break;
+ CMAP_FOR_EACH_WITH_HASH (keyn, cm_node, hash, &ct->conns) {
+ if (keyn->dir == CT_DIR_FWD) {
+ conn = CONTAINER_OF(keyn, struct conn, key_node[CT_DIR_FWD]);
+ } else {
+ conn = CONTAINER_OF(keyn, struct conn, key_node[CT_DIR_REV]);
+ }
+
+ if (conn_expired(conn, now)) {
+ continue;
}
- if (!conn_key_cmp(&conn->rev_key, key) && !conn_expired(conn, now)) {
- found = true;
- if (reply) {
- *reply = true;
+
+ for (int i = CT_DIR_FWD; i < CT_DIRS; i++) {
+ if (!conn_key_cmp(&conn->key_node[i].key, key)) {
+ found = true;
+ if (reply) {
+ *reply = (i == CT_DIR_REV);
+ }
+ goto out_found;
}
- break;
}
}
+out_found:
if (found && conn_out) {
*conn_out = conn;
} else if (conn_out) {
*conn_out = NULL;
}
+
return found;
}
@@ -585,7 +540,7 @@ write_ct_md(struct dp_packet *pkt, uint16_t zone, const struct conn *conn,
if (conn->alg_related) {
key = &conn->parent_key;
} else {
- key = &conn->key;
+ key = &conn->key_node[CT_DIR_FWD].key;
}
} else if (alg_exp) {
pkt->md.ct_mark = alg_exp->parent_mark;
@@ -814,7 +769,8 @@ nat_inner_packet(struct dp_packet *pkt, struct conn_key *key,
static void
nat_packet(struct dp_packet *pkt, struct conn *conn, bool reply, bool related)
{
- struct conn_key *key = reply ? &conn->key : &conn->rev_key;
+ enum key_dir dir = reply ? CT_DIR_FWD : CT_DIR_REV;
+ struct conn_key *key = &conn->key_node[dir].key;
uint16_t nat_action = reply ? nat_action_reverse(conn->nat_action)
: conn->nat_action;
@@ -849,7 +805,7 @@ conn_seq_skew_set(struct conntrack *ct, const struct conn *conn_in,
{
struct conn *conn;
ovs_mutex_unlock(&conn_in->lock);
- conn_lookup(ct, &conn_in->key, now, &conn, NULL);
+ conn_lookup(ct, &conn_in->key_node[CT_DIR_FWD].key, now, &conn, NULL);
ovs_mutex_lock(&conn_in->lock);
if (conn && seq_skew) {
@@ -887,7 +843,6 @@ conn_not_found(struct conntrack *ct, struct dp_packet *pkt,
OVS_REQUIRES(ct->ct_lock)
{
struct conn *nc = NULL;
- struct conn *nat_conn = NULL;
if (!valid_new(pkt, &ctx->key)) {
pkt->md.ct_state = CS_INVALID;
@@ -901,6 +856,7 @@ conn_not_found(struct conntrack *ct, struct dp_packet *pkt,
}
if (commit) {
+ struct conn_key_node *fwd_key_node, *rev_key_node;
struct zone_limit *zl = zone_limit_lookup_or_default(ct,
ctx->key.zone);
if (zl && zl->czl.count >= zl->czl.limit) {
@@ -915,9 +871,12 @@ conn_not_found(struct conntrack *ct, struct dp_packet *pkt,
}
nc = new_conn(ct, pkt, &ctx->key, now, tp_id);
- memcpy(&nc->key, &ctx->key, sizeof nc->key);
- memcpy(&nc->rev_key, &nc->key, sizeof nc->rev_key);
- conn_key_reverse(&nc->rev_key);
+ fwd_key_node = &nc->key_node[CT_DIR_FWD];
+ rev_key_node = &nc->key_node[CT_DIR_REV];
+ memcpy(&fwd_key_node->key, &ctx->key, sizeof fwd_key_node->key);
+ memcpy(&rev_key_node->key, &fwd_key_node->key,
+ sizeof rev_key_node->key);
+ conn_key_reverse(&rev_key_node->key);
if (ct_verify_helper(helper, ct_alg_ctl)) {
nc->alg = nullable_xstrdup(helper);
@@ -932,45 +891,33 @@ conn_not_found(struct conntrack *ct, struct dp_packet *pkt,
if (nat_action_info) {
nc->nat_action = nat_action_info->nat_action;
- nat_conn = xzalloc(sizeof *nat_conn);
if (alg_exp) {
if (alg_exp->nat_rpl_dst) {
- nc->rev_key.dst.addr = alg_exp->alg_nat_repl_addr;
+ rev_key_node->key.dst.addr = alg_exp->alg_nat_repl_addr;
nc->nat_action = NAT_ACTION_SRC;
} else {
- nc->rev_key.src.addr = alg_exp->alg_nat_repl_addr;
+ rev_key_node->key.src.addr = alg_exp->alg_nat_repl_addr;
nc->nat_action = NAT_ACTION_DST;
}
} else {
- memcpy(nat_conn, nc, sizeof *nat_conn);
- bool nat_res = nat_get_unique_tuple(ct, nc, nat_conn,
- nat_action_info);
+ bool nat_res = nat_get_unique_tuple(ct, nc, nat_action_info);
if (!nat_res) {
goto nat_res_exhaustion;
}
-
- /* Update nc with nat adjustments made to nat_conn by
- * nat_get_unique_tuple(). */
- memcpy(nc, nat_conn, sizeof *nc);
}
nat_packet(pkt, nc, false, ctx->icmp_related);
- memcpy(&nat_conn->key, &nc->rev_key, sizeof nat_conn->key);
- memcpy(&nat_conn->rev_key, &nc->key, sizeof nat_conn->rev_key);
- nat_conn->conn_type = CT_CONN_TYPE_UN_NAT;
- nat_conn->nat_action = 0;
- nat_conn->alg = NULL;
- nat_conn->nat_conn = NULL;
- uint32_t nat_hash = conn_key_hash(&nat_conn->key, ct->hash_basis);
- cmap_insert(&ct->conns, &nat_conn->cm_node, nat_hash);
+ uint32_t rev_hash = conn_key_hash(&rev_key_node->key,
+ ct->hash_basis);
+ cmap_insert(&ct->conns, &rev_key_node->cm_node, rev_hash);
}
- nc->nat_conn = nat_conn;
ovs_mutex_init_adaptive(&nc->lock);
- nc->conn_type = CT_CONN_TYPE_DEFAULT;
- cmap_insert(&ct->conns, &nc->cm_node, ctx->hash);
+ fwd_key_node->dir = CT_DIR_FWD;
+ rev_key_node->dir = CT_DIR_REV;
+ cmap_insert(&ct->conns, &fwd_key_node->cm_node, ctx->hash);
atomic_count_inc(&ct->n_conn);
ctx->conn = nc; /* For completeness. */
if (zl) {
@@ -990,7 +937,6 @@ conn_not_found(struct conntrack *ct, struct dp_packet *pkt,
* firewall rules or a separate firewall. Also using zone partitioning
* can limit DoS impact. */
nat_res_exhaustion:
- free(nat_conn);
ovs_list_remove(&nc->exp_node);
delete_conn__(nc);
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
@@ -1004,7 +950,6 @@ conn_update_state(struct conntrack *ct, struct dp_packet *pkt,
struct conn_lookup_ctx *ctx, struct conn *conn,
long long now)
{
- ovs_assert(conn->conn_type == CT_CONN_TYPE_DEFAULT);
bool create_new_conn = false;
if (ctx->icmp_related) {
@@ -1032,7 +977,8 @@ conn_update_state(struct conntrack *ct, struct dp_packet *pkt,
break;
case CT_UPDATE_NEW:
ovs_mutex_lock(&ct->ct_lock);
- if (conn_lookup(ct, &conn->key, now, NULL, NULL)) {
+ if (conn_lookup(ct, &conn->key_node[CT_DIR_FWD].key,
+ now, NULL, NULL)) {
conn_clean(ct, conn);
}
ovs_mutex_unlock(&ct->ct_lock);
@@ -1209,8 +1155,10 @@ initial_conn_lookup(struct conntrack *ct, struct conn_lookup_ctx *ctx,
if (natted) {
if (OVS_LIKELY(ctx->conn)) {
+ enum key_dir dir;
ctx->reply = !ctx->reply;
- ctx->key = ctx->reply ? ctx->conn->rev_key : ctx->conn->key;
+ dir = ctx->reply ? CT_DIR_REV : CT_DIR_FWD;
+ ctx->key = ctx->conn->key_node[dir].key;
ctx->hash = conn_key_hash(&ctx->key, ct->hash_basis);
} else {
/* A lookup failure does not necessarily imply that an
@@ -1244,32 +1192,14 @@ process_one(struct conntrack *ct, struct dp_packet *pkt,
/* Delete found entry if in wrong direction. 'force' implies commit. */
if (OVS_UNLIKELY(force && ctx->reply && conn)) {
ovs_mutex_lock(&ct->ct_lock);
- if (conn_lookup(ct, &conn->key, now, NULL, NULL)) {
+ if (conn_lookup(ct, &conn->key_node[CT_DIR_FWD].key,
+ now, NULL, NULL)) {
conn_clean(ct, conn);
}
ovs_mutex_unlock(&ct->ct_lock);
conn = NULL;
}
- if (OVS_LIKELY(conn)) {
- if (conn->conn_type == CT_CONN_TYPE_UN_NAT) {
-
- ctx->reply = true;
- struct conn *rev_conn = conn; /* Save for debugging. */
- uint32_t hash = conn_key_hash(&conn->rev_key, ct->hash_basis);
- conn_key_lookup(ct, &ctx->key, hash, now, &conn, &ctx->reply);
-
- if (!conn) {
- pkt->md.ct_state |= CS_INVALID;
- write_ct_md(pkt, zone, NULL, NULL, NULL);
- char *log_msg = xasprintf("Missing parent conn %p", rev_conn);
- ct_print_conn_info(rev_conn, log_msg, VLL_INFO, true, true);
- free(log_msg);
- return;
- }
- }
- }
-
enum ct_alg_ctl_type ct_alg_ctl = get_alg_ctl_type(pkt, tp_src, tp_dst,
helper);
@@ -1362,8 +1292,9 @@ conntrack_execute(struct conntrack *ct, struct dp_packet_batch *pkt_batch,
struct conn *conn = packet->md.conn;
if (OVS_UNLIKELY(packet->md.ct_state == CS_INVALID)) {
write_ct_md(packet, zone, NULL, NULL, NULL);
- } else if (conn && conn->key.zone == zone && !force
- && !get_alg_ctl_type(packet, tp_src, tp_dst, helper)) {
+ } else if (conn &&
+ conn->key_node[CT_DIR_FWD].key.zone == zone && !force &&
+ !get_alg_ctl_type(packet, tp_src, tp_dst, helper)) {
process_one_fast(zone, setmark, setlabel, nat_action_info,
conn, packet);
} else if (OVS_UNLIKELY(!conn_key_extract(ct, packet, dl_type, &ctx,
@@ -2143,7 +2074,7 @@ nat_ipv6_addr_increment(struct in6_addr *ipv6, uint32_t increment)
}
static uint32_t
-nat_range_hash(const struct conn *conn, uint32_t basis,
+nat_range_hash(const struct conn_key *key, uint32_t basis,
const struct nat_action_info_t *nat_info)
{
uint32_t hash = basis;
@@ -2153,11 +2084,11 @@ nat_range_hash(const struct conn *conn, uint32_t basis,
hash = hash_add(hash,
((uint32_t) nat_info->max_port << 16)
| nat_info->min_port);
- hash = ct_endpoint_hash_add(hash, &conn->key.src);
- hash = ct_endpoint_hash_add(hash, &conn->key.dst);
- hash = hash_add(hash, (OVS_FORCE uint32_t) conn->key.dl_type);
- hash = hash_add(hash, conn->key.nw_proto);
- hash = hash_add(hash, conn->key.zone);
+ hash = ct_endpoint_hash_add(hash, &key->src);
+ hash = ct_endpoint_hash_add(hash, &key->dst);
+ hash = hash_add(hash, (OVS_FORCE uint32_t) key->dl_type);
+ hash = hash_add(hash, key->nw_proto);
+ hash = hash_add(hash, key->zone);
/* The purpose of the second parameter is to distinguish hashes of data of
* different length; our data always has the same length so there is no
@@ -2231,7 +2162,7 @@ get_addr_in_range(union ct_addr *min, union ct_addr *max,
}
static void
-get_initial_addr(const struct conn *conn, union ct_addr *min,
+get_initial_addr(const struct conn_key *key, union ct_addr *min,
union ct_addr *max, union ct_addr *curr,
uint32_t hash, bool ipv4,
const struct nat_action_info_t *nat_info)
@@ -2241,9 +2172,9 @@ get_initial_addr(const struct conn *conn, union ct_addr *min,
/* All-zero case. */
if (!memcmp(min, &zero_ip, sizeof *min)) {
if (nat_info->nat_action & NAT_ACTION_SRC) {
- *curr = conn->key.src.addr;
+ *curr = key->src.addr;
} else if (nat_info->nat_action & NAT_ACTION_DST) {
- *curr = conn->key.dst.addr;
+ *curr = key->dst.addr;
}
} else {
get_addr_in_range(min, max, curr, hash, ipv4);
@@ -2307,7 +2238,7 @@ next_addr_in_range_guarded(union ct_addr *curr, union ct_addr *min,
}
static bool
-nat_get_unique_l4(struct conntrack *ct, struct conn *nat_conn,
+nat_get_unique_l4(struct conntrack *ct, struct conn_key *rev_key,
ovs_be16 *port, uint16_t curr, uint16_t min,
uint16_t max)
{
@@ -2315,8 +2246,7 @@ nat_get_unique_l4(struct conntrack *ct, struct conn *nat_conn,
FOR_EACH_PORT_IN_RANGE (curr, min, max) {
*port = htons(curr);
- if (!conn_lookup(ct, &nat_conn->rev_key,
- time_msec(), NULL, NULL)) {
+ if (!conn_lookup(ct, rev_key, time_msec(), NULL, NULL)) {
return true;
}
}
@@ -2348,45 +2278,45 @@ nat_get_unique_l4(struct conntrack *ct, struct conn *nat_conn,
*
* If none can be found, return exhaustion to the caller. */
static bool
-nat_get_unique_tuple(struct conntrack *ct, const struct conn *conn,
- struct conn *nat_conn,
+nat_get_unique_tuple(struct conntrack *ct, struct conn *conn,
const struct nat_action_info_t *nat_info)
{
+ struct conn_key *fwd_key = &conn->key_node[CT_DIR_FWD].key;
+ struct conn_key *rev_key = &conn->key_node[CT_DIR_REV].key;
union ct_addr min_addr = {0}, max_addr = {0}, curr_addr = {0},
guard_addr = {0};
- uint32_t hash = nat_range_hash(conn, ct->hash_basis, nat_info);
- bool pat_proto = conn->key.nw_proto == IPPROTO_TCP ||
- conn->key.nw_proto == IPPROTO_UDP;
+ bool pat_proto = fwd_key->nw_proto == IPPROTO_TCP ||
+ fwd_key->nw_proto == IPPROTO_UDP;
uint16_t min_dport, max_dport, curr_dport;
uint16_t min_sport, max_sport, curr_sport;
+ uint32_t hash;
+ hash = nat_range_hash(fwd_key, ct->hash_basis, nat_info);
min_addr = nat_info->min_addr;
max_addr = nat_info->max_addr;
- get_initial_addr(conn, &min_addr, &max_addr, &curr_addr, hash,
- (conn->key.dl_type == htons(ETH_TYPE_IP)), nat_info);
+ get_initial_addr(fwd_key, &min_addr, &max_addr, &curr_addr, hash,
+ (fwd_key->dl_type == htons(ETH_TYPE_IP)), nat_info);
/* Save the address we started from so that
* we can stop once we reach it. */
guard_addr = curr_addr;
- set_sport_range(nat_info, &conn->key, hash, &curr_sport,
+ set_sport_range(nat_info, fwd_key, hash, &curr_sport,
&min_sport, &max_sport);
- set_dport_range(nat_info, &conn->key, hash, &curr_dport,
+ set_dport_range(nat_info, fwd_key, hash, &curr_dport,
&min_dport, &max_dport);
if (pat_proto) {
- nat_conn->rev_key.src.port = htons(curr_dport);
- nat_conn->rev_key.dst.port = htons(curr_sport);
+ rev_key->src.port = htons(curr_dport);
+ rev_key->dst.port = htons(curr_sport);
}
another_round:
- store_addr_to_key(&curr_addr, &nat_conn->rev_key,
- nat_info->nat_action);
+ store_addr_to_key(&curr_addr, rev_key, nat_info->nat_action);
if (!pat_proto) {
- if (!conn_lookup(ct, &nat_conn->rev_key,
- time_msec(), NULL, NULL)) {
+ if (!conn_lookup(ct, rev_key, time_msec(), NULL, NULL)) {
return true;
}
@@ -2395,12 +2325,12 @@ another_round:
bool found = false;
if (nat_info->nat_action & NAT_ACTION_DST_PORT) {
- found = nat_get_unique_l4(ct, nat_conn, &nat_conn->rev_key.src.port,
+ found = nat_get_unique_l4(ct, rev_key, &rev_key->src.port,
curr_dport, min_dport, max_dport);
}
if (!found) {
- found = nat_get_unique_l4(ct, nat_conn, &nat_conn->rev_key.dst.port,
+ found = nat_get_unique_l4(ct, rev_key, &rev_key->dst.port,
curr_sport, min_sport, max_sport);
}
@@ -2413,7 +2343,7 @@ another_round:
next_addr:
if (next_addr_in_range_guarded(&curr_addr, &min_addr,
&max_addr, &guard_addr,
- conn->key.dl_type == htons(ETH_TYPE_IP))) {
+ fwd_key->dl_type == htons(ETH_TYPE_IP))) {
return false;
}
@@ -2425,23 +2355,20 @@ conn_update(struct conntrack *ct, struct conn *conn, struct dp_packet *pkt,
struct conn_lookup_ctx *ctx, long long now)
{
ovs_mutex_lock(&conn->lock);
+ uint8_t nw_proto = conn->key_node[CT_DIR_FWD].key.nw_proto;
enum ct_update_res update_res =
- l4_protos[conn->key.nw_proto]->conn_update(ct, conn, pkt, ctx->reply,
- now);
+ l4_protos[nw_proto]->conn_update(ct, conn, pkt, ctx->reply, now);
ovs_mutex_unlock(&conn->lock);
return update_res;
}
static bool
-conn_expired(struct conn *conn, long long now)
+conn_expired(const struct conn *conn, long long now)
{
- if (conn->conn_type == CT_CONN_TYPE_DEFAULT) {
- ovs_mutex_lock(&conn->lock);
- bool expired = now >= conn->expiration ? true : false;
- ovs_mutex_unlock(&conn->lock);
- return expired;
- }
- return false;
+ ovs_mutex_lock(&conn->lock);
+ bool expired = now >= conn->expiration ? true : false;
+ ovs_mutex_unlock(&conn->lock);
+ return expired;
}
static bool
@@ -2467,9 +2394,7 @@ delete_conn__(struct conn *conn)
static void
delete_conn(struct conn *conn)
{
- ovs_assert(conn->conn_type == CT_CONN_TYPE_DEFAULT);
ovs_mutex_destroy(&conn->lock);
- free(conn->nat_conn);
delete_conn__(conn);
}
@@ -2561,11 +2486,14 @@ static void
conn_to_ct_dpif_entry(const struct conn *conn, struct ct_dpif_entry *entry,
long long now)
{
+ const struct conn_key *rev_key = &conn->key_node[CT_DIR_REV].key;
+ const struct conn_key *key = &conn->key_node[CT_DIR_FWD].key;
+
memset(entry, 0, sizeof *entry);
- conn_key_to_tuple(&conn->key, &entry->tuple_orig);
- conn_key_to_tuple(&conn->rev_key, &entry->tuple_reply);
+ conn_key_to_tuple(key, &entry->tuple_orig);
+ conn_key_to_tuple(rev_key, &entry->tuple_reply);
- entry->zone = conn->key.zone;
+ entry->zone = key->zone;
ovs_mutex_lock(&conn->lock);
entry->mark = conn->mark;
@@ -2573,7 +2501,7 @@ conn_to_ct_dpif_entry(const struct conn *conn, struct ct_dpif_entry *entry,
long long expiration = conn->expiration - now;
- struct ct_l4_proto *class = l4_protos[conn->key.nw_proto];
+ struct ct_l4_proto *class = l4_protos[key->nw_proto];
if (class->conn_get_protoinfo) {
class->conn_get_protoinfo(conn, &entry->protoinfo);
}
@@ -2621,10 +2549,21 @@ conntrack_dump_next(struct conntrack_dump *dump, struct ct_dpif_entry *entry)
if (!cm_node) {
break;
}
+ struct conn_key_node *keyn;
struct conn *conn;
- INIT_CONTAINER(conn, cm_node, cm_node);
- if ((!dump->filter_zone || conn->key.zone == dump->zone) &&
- (conn->conn_type != CT_CONN_TYPE_UN_NAT)) {
+
+ INIT_CONTAINER(keyn, cm_node, cm_node);
+
+ if (keyn->dir != CT_DIR_FWD) {
+ continue;
+ }
+
+ conn = CONTAINER_OF(keyn, struct conn, key_node[CT_DIR_FWD]);
+ if (conn_expired(conn, now)) {
+ continue;
+ }
+
+ if ((!dump->filter_zone || keyn->key.zone == dump->zone)) {
conn_to_ct_dpif_entry(conn, entry, now);
return 0;
}
@@ -2642,15 +2581,17 @@ conntrack_dump_done(struct conntrack_dump *dump OVS_UNUSED)
int
conntrack_flush(struct conntrack *ct, const uint16_t *zone)
{
+ struct conn_key_node *keyn;
struct conn *conn;
ovs_mutex_lock(&ct->ct_lock);
- CMAP_FOR_EACH (conn, cm_node, &ct->conns) {
- if (conn->conn_type != CT_CONN_TYPE_DEFAULT) {
+ CMAP_FOR_EACH (keyn, cm_node, &ct->conns) {
+ if (keyn->dir != CT_DIR_FWD) {
continue;
}
- if (!zone || *zone == conn->key.zone) {
+ conn = CONTAINER_OF(keyn, struct conn, key_node[CT_DIR_FWD]);
+ if (!zone || *zone == keyn->key.zone) {
conn_clean(ct, conn);
}
}
@@ -2663,19 +2604,19 @@ int
conntrack_flush_tuple(struct conntrack *ct, const struct ct_dpif_tuple *tuple,
uint16_t zone)
{
- int error = 0;
struct conn_key key;
struct conn *conn;
+ int error = 0;
memset(&key, 0, sizeof(key));
tuple_to_conn_key(tuple, zone, &key);
ovs_mutex_lock(&ct->ct_lock);
conn_lookup(ct, &key, time_msec(), &conn, NULL);
- if (conn && conn->conn_type == CT_CONN_TYPE_DEFAULT) {
+ if (conn) {
conn_clean(ct, conn);
} else {
- VLOG_WARN("Must flush tuple using the original pre-NATed tuple");
+ VLOG_WARN("Tuple not found");
error = ENOENT;
}
@@ -2819,50 +2760,54 @@ expectation_create(struct conntrack *ct, ovs_be16 dst_port,
const struct conn *parent_conn, bool reply, bool src_ip_wc,
bool skip_nat)
{
+ const struct conn_key *pconn_key, *pconn_rev_key;
union ct_addr src_addr;
union ct_addr dst_addr;
union ct_addr alg_nat_repl_addr;
struct alg_exp_node *alg_exp_node = xzalloc(sizeof *alg_exp_node);
+ pconn_key = &parent_conn->key_node[CT_DIR_FWD].key;
+ pconn_rev_key = &parent_conn->key_node[CT_DIR_REV].key;
+
if (reply) {
- src_addr = parent_conn->key.src.addr;
- dst_addr = parent_conn->key.dst.addr;
+ src_addr = pconn_key->src.addr;
+ dst_addr = pconn_key->dst.addr;
alg_exp_node->nat_rpl_dst = true;
if (skip_nat) {
alg_nat_repl_addr = dst_addr;
} else if (parent_conn->nat_action & NAT_ACTION_DST) {
- alg_nat_repl_addr = parent_conn->rev_key.src.addr;
+ alg_nat_repl_addr = pconn_rev_key->src.addr;
alg_exp_node->nat_rpl_dst = false;
} else {
- alg_nat_repl_addr = parent_conn->rev_key.dst.addr;
+ alg_nat_repl_addr = pconn_rev_key->dst.addr;
}
} else {
- src_addr = parent_conn->rev_key.src.addr;
- dst_addr = parent_conn->rev_key.dst.addr;
+ src_addr = pconn_rev_key->src.addr;
+ dst_addr = pconn_rev_key->dst.addr;
alg_exp_node->nat_rpl_dst = false;
if (skip_nat) {
alg_nat_repl_addr = src_addr;
} else if (parent_conn->nat_action & NAT_ACTION_DST) {
- alg_nat_repl_addr = parent_conn->key.dst.addr;
+ alg_nat_repl_addr = pconn_key->dst.addr;
alg_exp_node->nat_rpl_dst = true;
} else {
- alg_nat_repl_addr = parent_conn->key.src.addr;
+ alg_nat_repl_addr = pconn_key->src.addr;
}
}
if (src_ip_wc) {
memset(&src_addr, 0, sizeof src_addr);
}
- alg_exp_node->key.dl_type = parent_conn->key.dl_type;
- alg_exp_node->key.nw_proto = parent_conn->key.nw_proto;
- alg_exp_node->key.zone = parent_conn->key.zone;
+ alg_exp_node->key.dl_type = pconn_key->dl_type;
+ alg_exp_node->key.nw_proto = pconn_key->nw_proto;
+ alg_exp_node->key.zone = pconn_key->zone;
alg_exp_node->key.src.addr = src_addr;
alg_exp_node->key.dst.addr = dst_addr;
alg_exp_node->key.src.port = ALG_WC_SRC_PORT;
alg_exp_node->key.dst.port = dst_port;
alg_exp_node->parent_mark = parent_conn->mark;
alg_exp_node->parent_label = parent_conn->label;
- memcpy(&alg_exp_node->parent_key, &parent_conn->key,
+ memcpy(&alg_exp_node->parent_key, pconn_key,
sizeof alg_exp_node->parent_key);
/* Take the write lock here because it is almost 100%
* likely that the lookup will fail and
@@ -3114,12 +3059,16 @@ process_ftp_ctl_v4(struct conntrack *ct,
switch (mode) {
case CT_FTP_MODE_ACTIVE:
- *v4_addr_rep = conn_for_expectation->rev_key.dst.addr.ipv4;
- conn_ipv4_addr = conn_for_expectation->key.src.addr.ipv4;
+ *v4_addr_rep =
+ conn_for_expectation->key_node[CT_DIR_REV].key.dst.addr.ipv4;
+ conn_ipv4_addr =
+ conn_for_expectation->key_node[CT_DIR_FWD].key.src.addr.ipv4;
break;
case CT_FTP_MODE_PASSIVE:
- *v4_addr_rep = conn_for_expectation->key.dst.addr.ipv4;
- conn_ipv4_addr = conn_for_expectation->rev_key.src.addr.ipv4;
+ *v4_addr_rep =
+ conn_for_expectation->key_node[CT_DIR_FWD].key.dst.addr.ipv4;
+ conn_ipv4_addr =
+ conn_for_expectation->key_node[CT_DIR_REV].key.src.addr.ipv4;
break;
case CT_TFTP_MODE:
default:
@@ -3151,7 +3100,7 @@ skip_ipv6_digits(char *str)
static enum ftp_ctl_pkt
process_ftp_ctl_v6(struct conntrack *ct,
struct dp_packet *pkt,
- const struct conn *conn_for_expectation,
+ const struct conn *conn_for_exp,
union ct_addr *v6_addr_rep, char **ftp_data_start,
size_t *addr_offset_from_ftp_data_start,
size_t *addr_size, enum ct_alg_mode *mode)
@@ -3219,24 +3168,25 @@ process_ftp_ctl_v6(struct conntrack *ct,
switch (*mode) {
case CT_FTP_MODE_ACTIVE:
- *v6_addr_rep = conn_for_expectation->rev_key.dst.addr;
+ *v6_addr_rep = conn_for_exp->key_node[CT_DIR_REV].key.dst.addr;
/* Although most servers will block this exploit, there may be some
* less well managed. */
if (memcmp(&ip6_addr, &v6_addr_rep->ipv6, sizeof ip6_addr) &&
- memcmp(&ip6_addr, &conn_for_expectation->key.src.addr.ipv6,
+ memcmp(&ip6_addr,
+ &conn_for_exp->key_node[CT_DIR_FWD].key.src.addr.ipv6,
sizeof ip6_addr)) {
return CT_FTP_CTL_INVALID;
}
break;
case CT_FTP_MODE_PASSIVE:
- *v6_addr_rep = conn_for_expectation->key.dst.addr;
+ *v6_addr_rep = conn_for_exp->key_node[CT_DIR_FWD].key.dst.addr;
break;
case CT_TFTP_MODE:
default:
OVS_NOT_REACHED();
}
- expectation_create(ct, port, conn_for_expectation,
+ expectation_create(ct, port, conn_for_exp,
!!(pkt->md.ct_state & CS_REPLY_DIR), false, false);
return CT_FTP_CTL_INTEREST;
}
@@ -3390,7 +3340,8 @@ handle_tftp_ctl(struct conntrack *ct,
long long now OVS_UNUSED, enum ftp_ctl_pkt ftp_ctl OVS_UNUSED,
bool nat OVS_UNUSED)
{
- expectation_create(ct, conn_for_expectation->key.src.port,
+ expectation_create(ct,
+ conn_for_expectation->key_node[CT_DIR_FWD].key.src.port,
conn_for_expectation,
!!(pkt->md.ct_state & CS_REPLY_DIR), false, false);
}