return -1; /* success */
}
+static_always_inline int
+icmp_get_ed_key(ip4_header_t *ip0, nat_ed_ses_key_t *p_key0)
+{
+ icmp46_header_t *icmp0;
+ nat_ed_ses_key_t key0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *)(icmp0+1);
+
+ if (!icmp_is_error_message (icmp0))
+ {
+ key0.proto = IP_PROTOCOL_ICMP;
+ key0.l_addr = ip0->dst_address;
+ key0.r_addr = ip0->src_address;
+ key0.l_port = key0.r_port = echo0->identifier;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *)(echo0+1);
+ l4_header = ip4_next_header (inner_ip0);
+ key0.proto = inner_ip0->protocol;
+ key0.l_addr = inner_ip0->src_address;
+ key0.r_addr = inner_ip0->dst_address;
+ switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t*)l4_header;
+ inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
+ key0.l_port = key0.r_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.l_port = ((tcp_udp_header_t*)l4_header)->src_port;
+ key0.r_port = ((tcp_udp_header_t*)l4_header)->dst_port;
+ break;
+ default:
+ return -1;
+ }
+ }
+ *p_key0 = key0;
+ return 0;
+}
+
+static void
+create_bypass_for_fwd(snat_main_t * sm, ip4_header_t * ip)
+{
+ nat_ed_ses_key_t key;
+ clib_bihash_kv_16_8_t kv;
+ udp_header_t *udp;
+
+ if (ip->protocol == IP_PROTOCOL_ICMP)
+ {
+ if (icmp_get_ed_key (ip, &key))
+ return;
+ }
+ else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
+ {
+ udp = ip4_next_header(ip);
+ key.r_addr = ip->src_address;
+ key.l_addr = ip->dst_address;
+ key.proto = ip->protocol;
+ key.l_port = udp->dst_port;
+ key.r_port = udp->src_port;
+ }
+ else
+ {
+ key.r_addr = ip->src_address;
+ key.l_addr = ip->dst_address;
+ key.proto = ip->protocol;
+ key.l_port = key.r_port = 0;
+ }
+ key.fib_index = 0;
+ kv.key[0] = key.as_u64[0];
+ kv.key[1] = key.as_u64[1];
+ kv.value = ~0ULL;
+
+ if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &kv, 1))
+ clib_warning ("in2out_ed key add failed");
+}
+
/**
* Get address and port values to be used for ICMP packet translation
* and create session if needed
}
else
{
+ create_bypass_for_fwd(sm, ip0);
dont_translate = 1;
goto out;
}
goto out;
}
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ if (PREDICT_FALSE (value0.value == ~0ULL))
+ {
+ nat_ed_ses_key_t key;
+ clib_bihash_kv_16_8_t s_kv, s_value;
+
+ key.as_u64[0] = 0;
+ key.as_u64[1] = 0;
+ if (icmp_get_ed_key (ip0, &key))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ key.fib_index = rx_fib_index0;
+ s_kv.key[0] = key.as_u64[0];
+ s_kv.key[1] = key.as_u64[1];
+ if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ s_value.value);
+ else
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ }
+ else
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
}
out:
* Send DHCP packets to the ipv4 stack, or we won't
* be able to use dhcp client on the outside interface
*/
- if (proto0 != SNAT_PROTOCOL_UDP
+ if (PREDICT_TRUE (proto0 != SNAT_PROTOCOL_UDP
|| (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
+ != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
next0 = SNAT_OUT2IN_NEXT_DROP;
+ else
+ vnet_feature_next
+ (vnet_buffer (b0)->sw_if_index[VLIB_RX],
+ &next0, b0);
goto trace0;
}
else
- goto trace0;
+ {
+ create_bypass_for_fwd(sm, ip0);
+ goto trace0;
+ }
}
/* Create session initiated by host from external network */
* Send DHCP packets to the ipv4 stack, or we won't
* be able to use dhcp client on the outside interface
*/
- if (proto1 != SNAT_PROTOCOL_UDP
+ if (PREDICT_TRUE (proto1 != SNAT_PROTOCOL_UDP
|| (udp1->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
+ != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
next1 = SNAT_OUT2IN_NEXT_DROP;
+ else
+ vnet_feature_next
+ (vnet_buffer (b1)->sw_if_index[VLIB_RX],
+ &next1, b1);
goto trace1;
}
else
- goto trace1;
+ {
+ create_bypass_for_fwd(sm, ip1);
+ goto trace1;
+ }
}
/* Create session initiated by host from external network */
* Send DHCP packets to the ipv4 stack, or we won't
* be able to use dhcp client on the outside interface
*/
- if (proto0 != SNAT_PROTOCOL_UDP
+ if (PREDICT_TRUE (proto0 != SNAT_PROTOCOL_UDP
|| (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
+ != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
next0 = SNAT_OUT2IN_NEXT_DROP;
+ else
+ vnet_feature_next
+ (vnet_buffer (b0)->sw_if_index[VLIB_RX],
+ &next0, b0);
goto trace00;
}
else
- goto trace00;
+ {
+ create_bypass_for_fwd(sm, ip0);
+ goto trace00;
+ }
}
/* Create session initiated by host from external network */
* Send DHCP packets to the ipv4 stack, or we won't
* be able to use dhcp client on the outside interface
*/
- if (proto0 != SNAT_PROTOCOL_UDP
+ if (PREDICT_TRUE (proto0 != SNAT_PROTOCOL_UDP
|| (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
+ != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
next0 = SNAT_OUT2IN_NEXT_DROP;
+ else
+ vnet_feature_next
+ (vnet_buffer (b0)->sw_if_index[VLIB_RX],
+ &next0, b0);
goto trace0;
}
else
- goto trace0;
+ {
+ create_bypass_for_fwd(sm, ip0);
+ goto trace0;
+ }
}
/* Create session initiated by host from external network */
Code Review / vpp.git / blobdiff