cnat_node_ctx_t * ctx, int rv,
cnat_session_t * session);
+static_always_inline u8
+icmp_type_is_error_message (u8 icmp_type)
+{
+ switch (icmp_type)
+ {
+ case ICMP4_destination_unreachable:
+ case ICMP4_time_exceeded:
+ case ICMP4_parameter_problem:
+ case ICMP4_source_quench:
+ case ICMP4_redirect:
+ case ICMP4_alternate_host_address:
+ return 1;
+ }
+ return 0;
+}
+
+static_always_inline u8
+icmp6_type_is_error_message (u8 icmp_type)
+{
+ switch (icmp_type)
+ {
+ case ICMP6_destination_unreachable:
+ case ICMP6_time_exceeded:
+ case ICMP6_parameter_problem:
+ return 1;
+ }
+ return 0;
+}
+
+static_always_inline u8
+cmp_ip6_address (const ip6_address_t * a1, const ip6_address_t * a2)
+{
+ return ((a1->as_u64[0] == a2->as_u64[0])
+ && (a1->as_u64[1] == a2->as_u64[1]));
+}
+
/**
* Inline translation functions
*/
static_always_inline void
cnat_ip4_translate_l4 (ip4_header_t * ip4, udp_header_t * udp,
- u16 * checksum,
+ ip_csum_t * sum,
ip4_address_t new_addr[VLIB_N_DIR],
u16 new_port[VLIB_N_DIR])
{
u16 old_port[VLIB_N_DIR];
ip4_address_t old_addr[VLIB_N_DIR];
- ip_csum_t sum;
+
+ /* Fastpath no checksum */
+ if (PREDICT_TRUE (0 == *sum))
+ {
+ udp->dst_port = new_port[VLIB_TX];
+ udp->src_port = new_port[VLIB_RX];
+ return;
+ }
old_port[VLIB_TX] = udp->dst_port;
old_port[VLIB_RX] = udp->src_port;
old_addr[VLIB_TX] = ip4->dst_address;
old_addr[VLIB_RX] = ip4->src_address;
- sum = *checksum;
if (new_addr[VLIB_TX].as_u32)
- sum =
- ip_csum_update (sum, old_addr[VLIB_TX].as_u32, new_addr[VLIB_TX].as_u32,
- ip4_header_t, dst_address);
+ {
+ *sum =
+ ip_csum_update (*sum, old_addr[VLIB_TX].as_u32,
+ new_addr[VLIB_TX].as_u32, ip4_header_t, dst_address);
+ }
if (new_port[VLIB_TX])
{
udp->dst_port = new_port[VLIB_TX];
- sum = ip_csum_update (sum, old_port[VLIB_TX], new_port[VLIB_TX],
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
+ *sum = ip_csum_update (*sum, old_port[VLIB_TX], new_port[VLIB_TX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
}
if (new_addr[VLIB_RX].as_u32)
- sum =
- ip_csum_update (sum, old_addr[VLIB_RX].as_u32, new_addr[VLIB_RX].as_u32,
- ip4_header_t, src_address);
-
+ {
+ *sum =
+ ip_csum_update (*sum, old_addr[VLIB_RX].as_u32,
+ new_addr[VLIB_RX].as_u32, ip4_header_t, src_address);
+ }
if (new_port[VLIB_RX])
{
udp->src_port = new_port[VLIB_RX];
- sum = ip_csum_update (sum, old_port[VLIB_RX], new_port[VLIB_RX],
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
+ *sum = ip_csum_update (*sum, old_port[VLIB_RX], new_port[VLIB_RX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
}
- *checksum = ip_csum_fold (sum);
}
static_always_inline void
}
}
+static_always_inline void
+cnat_translation_icmp4 (ip4_header_t * outer_ip4, udp_header_t * outer_udp,
+ ip4_address_t outer_new_addr[VLIB_N_DIR],
+ u16 outer_new_port[VLIB_N_DIR], u8 snat_outer_ip)
+{
+ icmp46_header_t *icmp = (icmp46_header_t *) outer_udp;
+ ip4_address_t new_addr[VLIB_N_DIR];
+ ip4_address_t old_addr[VLIB_N_DIR];
+ u16 new_port[VLIB_N_DIR];
+ u16 old_port[VLIB_N_DIR];
+ ip_csum_t sum, old_ip_sum, inner_l4_sum, inner_l4_old_sum;
+
+ if (!icmp_type_is_error_message (icmp->type))
+ return;
+
+ ip4_header_t *ip4 = (ip4_header_t *) (icmp + 2);
+ udp_header_t *udp = (udp_header_t *) (ip4 + 1);
+ tcp_header_t *tcp = (tcp_header_t *) udp;
+
+ /* Swap inner ports */
+ new_addr[VLIB_TX] = outer_new_addr[VLIB_RX];
+ new_addr[VLIB_RX] = outer_new_addr[VLIB_TX];
+ new_port[VLIB_TX] = outer_new_port[VLIB_RX];
+ new_port[VLIB_RX] = outer_new_port[VLIB_TX];
+
+ old_addr[VLIB_TX] = ip4->dst_address;
+ old_addr[VLIB_RX] = ip4->src_address;
+ old_port[VLIB_RX] = udp->src_port;
+ old_port[VLIB_TX] = udp->dst_port;
+
+ sum = icmp->checksum;
+ old_ip_sum = ip4->checksum;
+
+ /* translate outer ip. */
+ if (!snat_outer_ip)
+ outer_new_addr[VLIB_RX] = outer_ip4->src_address;
+ cnat_ip4_translate_l3 (outer_ip4, outer_new_addr);
+
+ if (ip4->protocol == IP_PROTOCOL_TCP)
+ {
+ inner_l4_old_sum = inner_l4_sum = tcp->checksum;
+ cnat_ip4_translate_l4 (ip4, udp, &inner_l4_sum, new_addr, new_port);
+ tcp->checksum = ip_csum_fold (inner_l4_sum);
+ }
+ else if (ip4->protocol == IP_PROTOCOL_UDP)
+ {
+ inner_l4_old_sum = inner_l4_sum = udp->checksum;
+ cnat_ip4_translate_l4 (ip4, udp, &inner_l4_sum, new_addr, new_port);
+ udp->checksum = ip_csum_fold (inner_l4_sum);
+ }
+ else
+ return;
+
+ /* UDP/TCP checksum changed */
+ sum = ip_csum_update (sum, inner_l4_old_sum, inner_l4_sum,
+ ip4_header_t, checksum);
+
+ /* UDP/TCP Ports changed */
+ if (old_port[VLIB_TX] && new_port[VLIB_TX])
+ sum = ip_csum_update (sum, old_port[VLIB_TX], new_port[VLIB_TX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+
+ if (old_port[VLIB_RX] && new_port[VLIB_RX])
+ sum = ip_csum_update (sum, old_port[VLIB_RX], new_port[VLIB_RX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+
+
+ cnat_ip4_translate_l3 (ip4, new_addr);
+ ip_csum_t new_ip_sum = ip4->checksum;
+ /* IP checksum changed */
+ sum = ip_csum_update (sum, old_ip_sum, new_ip_sum, ip4_header_t, checksum);
+
+ /* IP src/dst addr changed */
+ if (new_addr[VLIB_TX].as_u32)
+ sum =
+ ip_csum_update (sum, old_addr[VLIB_TX].as_u32, new_addr[VLIB_TX].as_u32,
+ ip4_header_t, dst_address);
+
+ if (new_addr[VLIB_RX].as_u32)
+ sum =
+ ip_csum_update (sum, old_addr[VLIB_RX].as_u32, new_addr[VLIB_RX].as_u32,
+ ip4_header_t, src_address);
+
+ icmp->checksum = ip_csum_fold (sum);
+}
+
static_always_inline void
cnat_translation_ip4 (const cnat_session_t * session,
ip4_header_t * ip4, udp_header_t * udp)
if (ip4->protocol == IP_PROTOCOL_TCP)
{
- if (PREDICT_FALSE (tcp->checksum))
- cnat_ip4_translate_l4 (ip4, udp, &tcp->checksum, new_addr, new_port);
- else
- {
- udp->dst_port = new_port[VLIB_TX];
- udp->src_port = new_port[VLIB_RX];
- }
+ ip_csum_t sum = tcp->checksum;
+ cnat_ip4_translate_l4 (ip4, udp, &sum, new_addr, new_port);
+ tcp->checksum = ip_csum_fold (sum);
+ cnat_ip4_translate_l3 (ip4, new_addr);
cnat_tcp_update_session_lifetime (tcp, session->value.cs_ts_index);
}
else if (ip4->protocol == IP_PROTOCOL_UDP)
{
- if (PREDICT_FALSE (udp->checksum))
- cnat_ip4_translate_l4 (ip4, udp, &udp->checksum, new_addr, new_port);
- else
- {
- udp->dst_port = new_port[VLIB_TX];
- udp->src_port = new_port[VLIB_RX];
- }
+ ip_csum_t sum = udp->checksum;
+ cnat_ip4_translate_l4 (ip4, udp, &sum, new_addr, new_port);
+ udp->checksum = ip_csum_fold (sum);
+ cnat_ip4_translate_l3 (ip4, new_addr);
+ }
+ else if (ip4->protocol == IP_PROTOCOL_ICMP)
+ {
+ /* SNAT only if src_addr was translated */
+ u8 snat_outer_ip =
+ (ip4->src_address.as_u32 == session->key.cs_ip[VLIB_RX].ip4.as_u32);
+ cnat_translation_icmp4 (ip4, udp, new_addr, new_port, snat_outer_ip);
}
-
- cnat_ip4_translate_l3 (ip4, new_addr);
}
static_always_inline void
static_always_inline void
cnat_ip6_translate_l4 (ip6_header_t * ip6, udp_header_t * udp,
- u16 * checksum,
+ ip_csum_t * sum,
ip6_address_t new_addr[VLIB_N_DIR],
u16 new_port[VLIB_N_DIR])
{
u16 old_port[VLIB_N_DIR];
ip6_address_t old_addr[VLIB_N_DIR];
- ip_csum_t sum;
+
+ /* Fastpath no checksum */
+ if (PREDICT_TRUE (0 == *sum))
+ {
+ udp->dst_port = new_port[VLIB_TX];
+ udp->src_port = new_port[VLIB_RX];
+ return;
+ }
old_port[VLIB_TX] = udp->dst_port;
old_port[VLIB_RX] = udp->src_port;
ip6_address_copy (&old_addr[VLIB_TX], &ip6->dst_address);
ip6_address_copy (&old_addr[VLIB_RX], &ip6->src_address);
- sum = *checksum;
if (has_ip6_address (&new_addr[VLIB_TX]))
{
- sum = ip_csum_add_even (sum, new_addr[VLIB_TX].as_u64[0]);
- sum = ip_csum_add_even (sum, new_addr[VLIB_TX].as_u64[1]);
- sum = ip_csum_sub_even (sum, old_addr[VLIB_TX].as_u64[0]);
- sum = ip_csum_sub_even (sum, old_addr[VLIB_TX].as_u64[1]);
+ *sum = ip_csum_add_even (*sum, new_addr[VLIB_TX].as_u64[0]);
+ *sum = ip_csum_add_even (*sum, new_addr[VLIB_TX].as_u64[1]);
+ *sum = ip_csum_sub_even (*sum, old_addr[VLIB_TX].as_u64[0]);
+ *sum = ip_csum_sub_even (*sum, old_addr[VLIB_TX].as_u64[1]);
}
if (new_port[VLIB_TX])
{
udp->dst_port = new_port[VLIB_TX];
- sum = ip_csum_update (sum, old_port[VLIB_TX], new_port[VLIB_TX],
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
+ *sum = ip_csum_update (*sum, old_port[VLIB_TX], new_port[VLIB_TX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
}
if (has_ip6_address (&new_addr[VLIB_RX]))
{
- sum = ip_csum_add_even (sum, new_addr[VLIB_RX].as_u64[0]);
- sum = ip_csum_add_even (sum, new_addr[VLIB_RX].as_u64[1]);
- sum = ip_csum_sub_even (sum, old_addr[VLIB_RX].as_u64[0]);
- sum = ip_csum_sub_even (sum, old_addr[VLIB_RX].as_u64[1]);
+ *sum = ip_csum_add_even (*sum, new_addr[VLIB_RX].as_u64[0]);
+ *sum = ip_csum_add_even (*sum, new_addr[VLIB_RX].as_u64[1]);
+ *sum = ip_csum_sub_even (*sum, old_addr[VLIB_RX].as_u64[0]);
+ *sum = ip_csum_sub_even (*sum, old_addr[VLIB_RX].as_u64[1]);
}
if (new_port[VLIB_RX])
{
udp->src_port = new_port[VLIB_RX];
- sum = ip_csum_update (sum, old_port[VLIB_RX], new_port[VLIB_RX],
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
+ *sum = ip_csum_update (*sum, old_port[VLIB_RX], new_port[VLIB_RX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
}
- *checksum = ip_csum_fold (sum);
+}
+
+static_always_inline void
+cnat_translation_icmp6 (ip6_header_t * outer_ip6, udp_header_t * outer_udp,
+ ip6_address_t outer_new_addr[VLIB_N_DIR],
+ u16 outer_new_port[VLIB_N_DIR], u8 snat_outer_ip)
+{
+ icmp46_header_t *icmp = (icmp46_header_t *) outer_udp;
+ ip6_address_t new_addr[VLIB_N_DIR];
+ ip6_address_t old_addr[VLIB_N_DIR];
+ ip6_address_t outer_old_addr[VLIB_N_DIR];
+ u16 new_port[VLIB_N_DIR];
+ u16 old_port[VLIB_N_DIR];
+ ip_csum_t sum, inner_l4_sum, inner_l4_old_sum;
+
+ if (!icmp6_type_is_error_message (icmp->type))
+ return;
+
+ ip6_header_t *ip6 = (ip6_header_t *) (icmp + 2);
+ udp_header_t *udp = (udp_header_t *) (ip6 + 1);
+ tcp_header_t *tcp = (tcp_header_t *) udp;
+
+ /* Swap inner ports */
+ ip6_address_copy (&new_addr[VLIB_RX], &outer_new_addr[VLIB_TX]);
+ ip6_address_copy (&new_addr[VLIB_TX], &outer_new_addr[VLIB_RX]);
+ new_port[VLIB_TX] = outer_new_port[VLIB_RX];
+ new_port[VLIB_RX] = outer_new_port[VLIB_TX];
+
+ ip6_address_copy (&old_addr[VLIB_TX], &ip6->dst_address);
+ ip6_address_copy (&old_addr[VLIB_RX], &ip6->src_address);
+ old_port[VLIB_RX] = udp->src_port;
+ old_port[VLIB_TX] = udp->dst_port;
+
+ sum = icmp->checksum;
+ /* Translate outer ip */
+ ip6_address_copy (&outer_old_addr[VLIB_TX], &outer_ip6->dst_address);
+ ip6_address_copy (&outer_old_addr[VLIB_RX], &outer_ip6->src_address);
+ if (!snat_outer_ip)
+ ip6_address_copy (&outer_new_addr[VLIB_RX], &outer_ip6->src_address);
+ cnat_ip6_translate_l3 (outer_ip6, outer_new_addr);
+ if (has_ip6_address (&outer_new_addr[VLIB_TX]))
+ {
+ sum = ip_csum_add_even (sum, outer_new_addr[VLIB_TX].as_u64[0]);
+ sum = ip_csum_add_even (sum, outer_new_addr[VLIB_TX].as_u64[1]);
+ sum = ip_csum_sub_even (sum, outer_old_addr[VLIB_TX].as_u64[0]);
+ sum = ip_csum_sub_even (sum, outer_old_addr[VLIB_TX].as_u64[1]);
+ }
+
+ if (has_ip6_address (&outer_new_addr[VLIB_RX]))
+ {
+ sum = ip_csum_add_even (sum, outer_new_addr[VLIB_RX].as_u64[0]);
+ sum = ip_csum_add_even (sum, outer_new_addr[VLIB_RX].as_u64[1]);
+ sum = ip_csum_sub_even (sum, outer_old_addr[VLIB_RX].as_u64[0]);
+ sum = ip_csum_sub_even (sum, outer_old_addr[VLIB_RX].as_u64[1]);
+ }
+
+ if (ip6->protocol == IP_PROTOCOL_TCP)
+ {
+ inner_l4_old_sum = inner_l4_sum = tcp->checksum;
+ cnat_ip6_translate_l4 (ip6, udp, &inner_l4_sum, new_addr, new_port);
+ tcp->checksum = ip_csum_fold (inner_l4_sum);
+ }
+ else if (ip6->protocol == IP_PROTOCOL_UDP)
+ {
+ inner_l4_old_sum = inner_l4_sum = udp->checksum;
+ cnat_ip6_translate_l4 (ip6, udp, &inner_l4_sum, new_addr, new_port);
+ udp->checksum = ip_csum_fold (inner_l4_sum);
+ }
+ else
+ return;
+
+ /* UDP/TCP checksum changed */
+ sum = ip_csum_update (sum, inner_l4_old_sum, inner_l4_sum,
+ ip4_header_t /* cheat */ ,
+ checksum);
+
+ /* UDP/TCP Ports changed */
+ if (old_port[VLIB_TX] && new_port[VLIB_TX])
+ sum = ip_csum_update (sum, old_port[VLIB_TX], new_port[VLIB_TX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+
+ if (old_port[VLIB_RX] && new_port[VLIB_RX])
+ sum = ip_csum_update (sum, old_port[VLIB_RX], new_port[VLIB_RX],
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+
+
+ cnat_ip6_translate_l3 (ip6, new_addr);
+ /* IP src/dst addr changed */
+ if (has_ip6_address (&new_addr[VLIB_TX]))
+ {
+ sum = ip_csum_add_even (sum, new_addr[VLIB_TX].as_u64[0]);
+ sum = ip_csum_add_even (sum, new_addr[VLIB_TX].as_u64[1]);
+ sum = ip_csum_sub_even (sum, old_addr[VLIB_TX].as_u64[0]);
+ sum = ip_csum_sub_even (sum, old_addr[VLIB_TX].as_u64[1]);
+ }
+
+ if (has_ip6_address (&new_addr[VLIB_RX]))
+ {
+ sum = ip_csum_add_even (sum, new_addr[VLIB_RX].as_u64[0]);
+ sum = ip_csum_add_even (sum, new_addr[VLIB_RX].as_u64[1]);
+ sum = ip_csum_sub_even (sum, old_addr[VLIB_RX].as_u64[0]);
+ sum = ip_csum_sub_even (sum, old_addr[VLIB_RX].as_u64[1]);
+ }
+
+ icmp->checksum = ip_csum_fold (sum);
}
static_always_inline void
if (ip6->protocol == IP_PROTOCOL_TCP)
{
- if (PREDICT_FALSE (tcp->checksum))
- cnat_ip6_translate_l4 (ip6, udp, &tcp->checksum, new_addr, new_port);
- else
- {
- udp->dst_port = new_port[VLIB_TX];
- udp->src_port = new_port[VLIB_RX];
- }
+ ip_csum_t sum = tcp->checksum;
+ cnat_ip6_translate_l4 (ip6, udp, &sum, new_addr, new_port);
+ tcp->checksum = ip_csum_fold (sum);
+ cnat_ip6_translate_l3 (ip6, new_addr);
cnat_tcp_update_session_lifetime (tcp, session->value.cs_ts_index);
}
else if (ip6->protocol == IP_PROTOCOL_UDP)
{
- if (PREDICT_FALSE (udp->checksum))
- cnat_ip6_translate_l4 (ip6, udp, &udp->checksum, new_addr, new_port);
- else
- {
- udp->dst_port = new_port[VLIB_TX];
- udp->src_port = new_port[VLIB_RX];
- }
+ ip_csum_t sum = udp->checksum;
+ cnat_ip6_translate_l4 (ip6, udp, &sum, new_addr, new_port);
+ udp->checksum = ip_csum_fold (sum);
+ cnat_ip6_translate_l3 (ip6, new_addr);
+ }
+ else if (ip6->protocol == IP_PROTOCOL_ICMP6)
+ {
+ /* SNAT only if src_addr was translated */
+ u8 snat_outer_ip = cmp_ip6_address (&ip6->src_address,
+ &session->key.cs_ip[VLIB_RX].ip6);
+ cnat_translation_icmp6 (ip6, udp, new_addr, new_port, snat_outer_ip);
}
-
- cnat_ip6_translate_l3 (ip6, new_addr);
}
static_always_inline void
{
udp_header_t *udp;
cnat_session_t *session = (cnat_session_t *) bkey;
+ session->key.cs_af = af;
+ session->key.__cs_pad[0] = 0;
+ session->key.__cs_pad[1] = 0;
if (AF_IP4 == af)
{
ip4_header_t *ip4;
ip4 = vlib_buffer_get_current (b);
- udp = (udp_header_t *) (ip4 + 1);
- session->key.cs_af = AF_IP4;
- session->key.__cs_pad[0] = 0;
- session->key.__cs_pad[1] = 0;
+ if (PREDICT_FALSE (ip4->protocol == IP_PROTOCOL_ICMP))
+ {
+ icmp46_header_t *icmp = (icmp46_header_t *) (ip4 + 1);
+ if (!icmp_type_is_error_message (icmp->type))
+ goto error;
+ ip4 = (ip4_header_t *) (icmp + 2); /* Use inner packet */
+ udp = (udp_header_t *) (ip4 + 1);
+ /* Swap dst & src for search as ICMP payload is reversed */
+ ip46_address_set_ip4 (&session->key.cs_ip[VLIB_RX],
+ &ip4->dst_address);
+ ip46_address_set_ip4 (&session->key.cs_ip[VLIB_TX],
+ &ip4->src_address);
+ session->key.cs_proto = ip4->protocol;
+ session->key.cs_port[VLIB_TX] = udp->src_port;
+ session->key.cs_port[VLIB_RX] = udp->dst_port;
+ }
+ else
+ {
+ udp = (udp_header_t *) (ip4 + 1);
+ ip46_address_set_ip4 (&session->key.cs_ip[VLIB_TX],
+ &ip4->dst_address);
+ ip46_address_set_ip4 (&session->key.cs_ip[VLIB_RX],
+ &ip4->src_address);
+ session->key.cs_proto = ip4->protocol;
+ session->key.cs_port[VLIB_RX] = udp->src_port;
+ session->key.cs_port[VLIB_TX] = udp->dst_port;
+ }
- ip46_address_set_ip4 (&session->key.cs_ip[VLIB_TX], &ip4->dst_address);
- ip46_address_set_ip4 (&session->key.cs_ip[VLIB_RX], &ip4->src_address);
- session->key.cs_port[VLIB_RX] = udp->src_port;
- session->key.cs_port[VLIB_TX] = udp->dst_port;
- session->key.cs_proto = ip4->protocol;
}
else
{
ip6_header_t *ip6;
ip6 = vlib_buffer_get_current (b);
- udp = (udp_header_t *) (ip6 + 1);
- session->key.cs_af = AF_IP6;
- session->key.__cs_pad[0] = 0;
- session->key.__cs_pad[1] = 0;
-
- ip46_address_set_ip6 (&session->key.cs_ip[VLIB_TX], &ip6->dst_address);
- ip46_address_set_ip6 (&session->key.cs_ip[VLIB_RX], &ip6->src_address);
- session->key.cs_port[VLIB_RX] = udp->src_port;
- session->key.cs_port[VLIB_TX] = udp->dst_port;
- session->key.cs_proto = ip6->protocol;
+ if (PREDICT_FALSE (ip6->protocol == IP_PROTOCOL_ICMP6))
+ {
+ icmp46_header_t *icmp = (icmp46_header_t *) (ip6 + 1);
+ if (!icmp6_type_is_error_message (icmp->type))
+ goto error;
+ ip6 = (ip6_header_t *) (icmp + 2); /* Use inner packet */
+ udp = (udp_header_t *) (ip6 + 1);
+ /* Swap dst & src for search as ICMP payload is reversed */
+ ip46_address_set_ip6 (&session->key.cs_ip[VLIB_RX],
+ &ip6->dst_address);
+ ip46_address_set_ip6 (&session->key.cs_ip[VLIB_TX],
+ &ip6->src_address);
+ session->key.cs_proto = ip6->protocol;
+ session->key.cs_port[VLIB_TX] = udp->src_port;
+ session->key.cs_port[VLIB_RX] = udp->dst_port;
+ }
+ else
+ {
+ udp = (udp_header_t *) (ip6 + 1);
+ ip46_address_set_ip6 (&session->key.cs_ip[VLIB_TX],
+ &ip6->dst_address);
+ ip46_address_set_ip6 (&session->key.cs_ip[VLIB_RX],
+ &ip6->src_address);
+ session->key.cs_port[VLIB_RX] = udp->src_port;
+ session->key.cs_port[VLIB_TX] = udp->dst_port;
+ session->key.cs_proto = ip6->protocol;
+ }
}
+ return;
+
+error:
+ /* Ensure we dont find anything */
+ session->key.cs_proto = 0;
+ return;
}
/**
clib_bihash_kv_40_48_t rvalue;
int rv;
- /* create the reverse flow key */
- ip46_address_copy (&rsession->key.cs_ip[VLIB_RX],
- &session->value.cs_ip[VLIB_TX]);
- ip46_address_copy (&rsession->key.cs_ip[VLIB_TX],
- &session->value.cs_ip[VLIB_RX]);
- rsession->key.cs_proto = session->key.cs_proto;
- rsession->key.__cs_pad[0] = 0;
- rsession->key.__cs_pad[1] = 0;
- rsession->key.cs_af = ctx->af;
- rsession->key.cs_port[VLIB_RX] = session->value.cs_port[VLIB_TX];
- rsession->key.cs_port[VLIB_TX] = session->value.cs_port[VLIB_RX];
-
- /* First search for existing reverse session */
- rv = clib_bihash_search_inline_2_40_48 (&cnat_session_db, &rkey, &rvalue);
- if (!rv)
- {
- /* Reverse session already exists
- corresponding client should also exist
- we only need to refcnt the timestamp */
- cnat_session_t *found_rsession = (cnat_session_t *) & rvalue;
- session->value.cs_ts_index = found_rsession->value.cs_ts_index;
- cnat_timestamp_inc_refcnt (session->value.cs_ts_index);
- clib_bihash_add_del_40_48 (&cnat_session_db, bkey, 1 /* is_add */ );
- goto create_rsession;
- }
-
session->value.cs_ts_index = cnat_timestamp_new (ctx->now);
clib_bihash_add_del_40_48 (&cnat_session_db, bkey, 1);
}
else
{
+ /* Refcount reverse session */
cnat_client_cnt_session (cc);
}
-create_rsession:
+ /* create the reverse flow key */
+ ip46_address_copy (&rsession->key.cs_ip[VLIB_RX],
+ &session->value.cs_ip[VLIB_TX]);
+ ip46_address_copy (&rsession->key.cs_ip[VLIB_TX],
+ &session->value.cs_ip[VLIB_RX]);
+ rsession->key.cs_proto = session->key.cs_proto;
+ rsession->key.__cs_pad[0] = 0;
+ rsession->key.__cs_pad[1] = 0;
+ rsession->key.cs_af = ctx->af;
+ rsession->key.cs_port[VLIB_RX] = session->value.cs_port[VLIB_TX];
+ rsession->key.cs_port[VLIB_TX] = session->value.cs_port[VLIB_RX];
+
+ /* First search for existing reverse session */
+ rv = clib_bihash_search_inline_2_40_48 (&cnat_session_db, &rkey, &rvalue);
+ if (!rv)
+ {
+ /* Reverse session already exists
+ cleanup before creating for refcnts */
+ cnat_session_t *found_rsession = (cnat_session_t *) & rvalue;
+ cnat_session_free (found_rsession);
+ }
/* add the reverse flow */
ip46_address_copy (&rsession->value.cs_ip[VLIB_RX],
&session->key.cs_ip[VLIB_TX]);
Code Review / vpp.git / blobdiff