/*
- * Copyright (c) 2016-2019 Cisco and/or its affiliates.
+ * Copyright (c) 2016-2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
* limitations under the License.
*/
-/** @file
- udp state machine, etc.
-*/
-
#include <vnet/udp/udp.h>
#include <vnet/session/session.h>
#include <vnet/dpo/load_balance.h>
udp_connection_cleanup (uc);
}
-u32
+static u8
+udp_connection_port_used_extern (u16 lcl_port, u8 is_ip4)
+{
+ udp_main_t *um = vnet_get_udp_main ();
+ udp_dst_port_info_t *pi;
+
+ pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
+ return (pi && !pi->n_connections
+ && udp_is_valid_dst_port (lcl_port, is_ip4));
+}
+
+static u16
+udp_default_mtu (udp_main_t * um, u8 is_ip4)
+{
+ u16 ip_hlen = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
+ return (um->default_mtu - sizeof (udp_header_t) - ip_hlen);
+}
+
+static u32
udp_session_bind (u32 session_index, transport_endpoint_t * lcl)
{
udp_main_t *um = vnet_get_udp_main ();
vlib_main_t *vm = vlib_get_main ();
transport_endpoint_cfg_t *lcl_ext;
udp_connection_t *listener;
- udp_dst_port_info_t *pi;
u16 lcl_port_ho;
void *iface_ip;
lcl_port_ho = clib_net_to_host_u16 (lcl->port);
- pi = udp_get_dst_port_info (um, lcl_port_ho, lcl->is_ip4);
- if (pi && !pi->n_connections
- && udp_is_valid_dst_port (lcl_port_ho, lcl->is_ip4))
+ if (udp_connection_port_used_extern (lcl_port_ho, lcl->is_ip4))
{
clib_warning ("port already used");
- return -1;
+ return SESSION_E_PORTINUSE;
}
pool_get (um->listener_pool, listener);
listener->c_proto = TRANSPORT_PROTO_UDP;
listener->c_s_index = session_index;
listener->c_fib_index = lcl->fib_index;
+ listener->mss = udp_default_mtu (um, listener->c_is_ip4);
listener->flags |= UDP_CONN_F_OWNS_PORT | UDP_CONN_F_LISTEN;
lcl_ext = (transport_endpoint_cfg_t *) lcl;
if (lcl_ext->transport_flags & TRANSPORT_CFG_F_CONNECTED)
return listener->c_c_index;
}
-u32
+static u32
udp_session_unbind (u32 listener_index)
{
udp_main_t *um = &udp_main;
return 0;
}
-transport_connection_t *
+static transport_connection_t *
udp_session_get_listener (u32 listener_index)
{
udp_connection_t *us;
return &us->connection;
}
-u32
+static u32
udp_push_header (transport_connection_t * tc, vlib_buffer_t * b)
{
udp_connection_t *uc;
vlib_main_t *vm = vlib_get_main ();
- uc = udp_get_connection_from_transport (tc);
+ uc = udp_connection_from_transport (tc);
vlib_buffer_push_udp (b, uc->c_lcl_port, uc->c_rmt_port, 1);
if (tc->is_ip4)
- vlib_buffer_push_ip4 (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
- IP_PROTOCOL_UDP, 1);
+ vlib_buffer_push_ip4_custom (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
+ IP_PROTOCOL_UDP, 1 /* csum offload */ ,
+ 0 /* is_df */ );
else
- {
- ip6_header_t *ih;
- ih = vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
- IP_PROTOCOL_UDP);
- vnet_buffer (b)->l3_hdr_offset = (u8 *) ih - b->data;
- }
+ vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
+ IP_PROTOCOL_UDP);
vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
vnet_buffer (b)->sw_if_index[VLIB_TX] = uc->c_fib_index;
b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
return 0;
}
-transport_connection_t *
+static transport_connection_t *
udp_session_get (u32 connection_index, u32 thread_index)
{
udp_connection_t *uc;
return 0;
}
-void
+static void
udp_session_close (u32 connection_index, u32 thread_index)
{
udp_connection_t *uc;
uc->flags |= UDP_CONN_F_CLOSING;
}
-void
+static void
udp_session_cleanup (u32 connection_index, u32 thread_index)
{
udp_connection_t *uc;
udp_connection_cleanup (uc);
}
-u8 *
-format_udp_connection_id (u8 * s, va_list * args)
-{
- udp_connection_t *uc = va_arg (*args, udp_connection_t *);
- if (!uc)
- return s;
- if (uc->c_is_ip4)
- s = format (s, "[%u:%u][%s] %U:%d->%U:%d", uc->c_thread_index,
- uc->c_s_index, "U", format_ip4_address, &uc->c_lcl_ip4,
- clib_net_to_host_u16 (uc->c_lcl_port), format_ip4_address,
- &uc->c_rmt_ip4, clib_net_to_host_u16 (uc->c_rmt_port));
- else
- s = format (s, "[%u:%u][%s] %U:%d->%U:%d", uc->c_thread_index,
- uc->c_s_index, "U", format_ip6_address, &uc->c_lcl_ip6,
- clib_net_to_host_u16 (uc->c_lcl_port), format_ip6_address,
- &uc->c_rmt_ip6, clib_net_to_host_u16 (uc->c_rmt_port));
- return s;
-}
-
-const char *udp_connection_flags_str[] = {
-#define _(sym, str) str,
- foreach_udp_connection_flag
-#undef _
-};
-
-static u8 *
-format_udp_connection_flags (u8 * s, va_list * args)
-{
- udp_connection_t *uc = va_arg (*args, udp_connection_t *);
- int i, last = -1;
-
- for (i = 0; i < UDP_CONN_N_FLAGS; i++)
- if (uc->flags & (1 << i))
- last = i;
- for (i = 0; i < last; i++)
- {
- if (uc->flags & (1 << i))
- s = format (s, "%s, ", udp_connection_flags_str[i]);
- }
- if (last >= 0)
- s = format (s, "%s", udp_connection_flags_str[last]);
- return s;
-}
-
-static u8 *
-format_udp_vars (u8 * s, va_list * args)
-{
- udp_connection_t *uc = va_arg (*args, udp_connection_t *);
- s = format (s, " index %u flags: %U", uc->c_c_index,
- format_udp_connection_flags, uc);
-
- if (!(uc->flags & UDP_CONN_F_LISTEN))
- s = format (s, "\n");
- return s;
-}
-
-u8 *
-format_udp_connection (u8 * s, va_list * args)
-{
- udp_connection_t *uc = va_arg (*args, udp_connection_t *);
- u32 verbose = va_arg (*args, u32);
- if (!uc)
- return s;
- s = format (s, "%-50U", format_udp_connection_id, uc);
- if (verbose)
- {
- s = format (s, "%-15s",
- (uc->flags & UDP_CONN_F_LISTEN) ? "LISTEN" : "OPENED", uc);
- if (verbose > 1)
- s = format (s, "\n%U", format_udp_vars, uc);
- }
- return s;
-}
-
-u8 *
-format_udp_session (u8 * s, va_list * args)
-{
- u32 uci = va_arg (*args, u32);
- u32 thread_index = va_arg (*args, u32);
- u32 verbose = va_arg (*args, u32);
- udp_connection_t *uc;
-
- uc = udp_connection_get (uci, thread_index);
- return format (s, "%U", format_udp_connection, uc, verbose);
-}
-
-u8 *
-format_udp_half_open_session (u8 * s, va_list * args)
-{
- u32 __clib_unused tci = va_arg (*args, u32);
- u32 __clib_unused thread_index = va_arg (*args, u32);
- clib_warning ("BUG");
- return 0;
-}
-
-u8 *
-format_udp_listener_session (u8 * s, va_list * args)
-{
- u32 tci = va_arg (*args, u32);
- u32 __clib_unused thread_index = va_arg (*args, u32);
- u32 verbose = va_arg (*args, u32);
- udp_connection_t *uc = udp_listener_get (tci);
- return format (s, "%U", format_udp_connection, uc, verbose);
-}
-
static int
udp_session_send_params (transport_connection_t * tconn,
transport_send_params_t * sp)
{
+ udp_connection_t *uc;
+
+ uc = udp_connection_from_transport (tconn);
+
/* No constraint on TX window */
sp->snd_space = ~0;
/* TODO figure out MTU of output interface */
- sp->snd_mss = 1460;
+ sp->snd_mss = uc->mss;
sp->tx_offset = 0;
sp->flags = 0;
return 0;
}
-int
+static int
udp_open_connection (transport_endpoint_cfg_t * rmt)
{
vlib_main_t *vm = vlib_get_main ();
u32 thread_index = vm->thread_index;
- udp_connection_t *uc;
+ udp_main_t *um = &udp_main;
ip46_address_t lcl_addr;
+ udp_connection_t *uc;
u16 lcl_port;
+ int rv;
- if (transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
- &lcl_port))
- return -1;
+ rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
+ &lcl_port);
+ if (rv)
+ {
+ if (rv != SESSION_E_PORTINUSE)
+ return rv;
+
+ if (udp_connection_port_used_extern (lcl_port, rmt->is_ip4))
+ return SESSION_E_PORTINUSE;
+
+ /* If port in use, check if 5-tuple is also in use */
+ if (session_lookup_connection (rmt->fib_index, &lcl_addr, &rmt->ip,
+ lcl_port, rmt->port, TRANSPORT_PROTO_UDP,
+ rmt->is_ip4))
+ return SESSION_E_PORTINUSE;
+
+ /* 5-tuple is available so increase lcl endpoint refcount and proceed
+ * with connection allocation */
+ transport_share_local_endpoint (TRANSPORT_PROTO_UDP, &lcl_addr,
+ lcl_port);
+ goto conn_alloc;
+ }
if (udp_is_valid_dst_port (lcl_port, rmt->is_ip4))
{
/* If specific source port was requested abort */
if (rmt->peer.port)
- return -1;
+ return SESSION_E_PORTINUSE;
/* Try to find a port that's not used */
while (udp_is_valid_dst_port (lcl_port, rmt->is_ip4))
lcl_port = transport_alloc_local_port (TRANSPORT_PROTO_UDP,
&lcl_addr);
if (lcl_port < 1)
- {
- clib_warning ("Failed to allocate src port");
- return -1;
- }
+ return SESSION_E_PORTINUSE;
}
}
+conn_alloc:
+
udp_connection_register_port (vm, lcl_port, rmt->is_ip4);
/* We don't poll main thread if we have workers */
uc->c_is_ip4 = rmt->is_ip4;
uc->c_proto = TRANSPORT_PROTO_UDP;
uc->c_fib_index = rmt->fib_index;
+ uc->mss = rmt->mss ? rmt->mss : udp_default_mtu (um, uc->c_is_ip4);
uc->flags |= UDP_CONN_F_OWNS_PORT;
if (rmt->transport_flags & TRANSPORT_CFG_F_CONNECTED)
uc->flags |= UDP_CONN_F_CONNECTED;
return uc->c_c_index;
}
-transport_connection_t *
+static transport_connection_t *
udp_session_get_half_open (u32 conn_index)
{
udp_connection_t *uc;
return &uc->connection;
}
-/* *INDENT-OFF* */
-static const transport_proto_vft_t udp_proto = {
- .start_listen = udp_session_bind,
- .connect = udp_open_connection,
- .stop_listen = udp_session_unbind,
- .push_header = udp_push_header,
- .get_connection = udp_session_get,
- .get_listener = udp_session_get_listener,
- .get_half_open = udp_session_get_half_open,
- .close = udp_session_close,
- .cleanup = udp_session_cleanup,
- .send_params = udp_session_send_params,
- .format_connection = format_udp_session,
- .format_half_open = format_udp_half_open_session,
- .format_listener = format_udp_listener_session,
- .transport_options = {
- .name = "udp",
- .short_name = "U",
- .tx_type = TRANSPORT_TX_DGRAM,
- .service_type = TRANSPORT_SERVICE_CL,
- },
-};
-/* *INDENT-ON* */
+static u8 *
+format_udp_session (u8 * s, va_list * args)
+{
+ u32 uci = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ udp_connection_t *uc;
+ uc = udp_connection_get (uci, thread_index);
+ return format (s, "%U", format_udp_connection, uc, verbose);
+}
-int
-udpc_connection_open (transport_endpoint_cfg_t * rmt)
+static u8 *
+format_udp_half_open_session (u8 * s, va_list * args)
{
- udp_connection_t *uc;
- /* Reproduce the logic of udp_open_connection to find the correct thread */
- u32 thread_index = vlib_num_workers ()? 1 : vlib_get_main ()->thread_index;
- u32 uc_index;
- uc_index = udp_open_connection (rmt);
- if (uc_index == (u32) ~ 0)
- return -1;
- uc = udp_connection_get (uc_index, thread_index);
- uc->flags |= UDP_CONN_F_CONNECTED;
- return uc_index;
+ u32 __clib_unused tci = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
+ clib_warning ("BUG");
+ return 0;
}
-u32
-udpc_connection_listen (u32 session_index, transport_endpoint_t * lcl)
+static u8 *
+format_udp_listener_session (u8 * s, va_list * args)
{
- udp_connection_t *listener;
- u32 li_index;
- li_index = udp_session_bind (session_index, lcl);
- if (li_index == (u32) ~ 0)
- return -1;
- listener = udp_listener_get (li_index);
- listener->flags |= UDP_CONN_F_CONNECTED;
- /* Fake udp listener, i.e., make sure session layer adds a udp instead of
- * udpc listener to the lookup table */
- ((session_endpoint_cfg_t *) lcl)->transport_proto = TRANSPORT_PROTO_UDP;
- return li_index;
+ u32 tci = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ udp_connection_t *uc = udp_listener_get (tci);
+ return format (s, "%U", format_udp_connection, uc, verbose);
}
/* *INDENT-OFF* */
-static const transport_proto_vft_t udpc_proto = {
- .start_listen = udpc_connection_listen,
+static const transport_proto_vft_t udp_proto = {
+ .start_listen = udp_session_bind,
+ .connect = udp_open_connection,
.stop_listen = udp_session_unbind,
- .connect = udpc_connection_open,
.push_header = udp_push_header,
.get_connection = udp_session_get,
.get_listener = udp_session_get_listener,
.format_half_open = format_udp_half_open_session,
.format_listener = format_udp_listener_session,
.transport_options = {
- .name = "udpc",
+ .name = "udp",
.short_name = "U",
.tx_type = TRANSPORT_TX_DGRAM,
- .service_type = TRANSPORT_SERVICE_VC,
- .half_open_has_fifos = 1
+ .service_type = TRANSPORT_SERVICE_CL,
},
};
/* *INDENT-ON* */
FIB_PROTOCOL_IP4, ip4_lookup_node.index);
transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
FIB_PROTOCOL_IP6, ip6_lookup_node.index);
- transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
- FIB_PROTOCOL_IP4, ip4_lookup_node.index);
- transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
- FIB_PROTOCOL_IP6, ip6_lookup_node.index);
/*
* Initialize data structures
vlib_node_add_next (vm, udp4_local_node.index, udp4_input_node.index);
um->local_to_input_edge[UDP_IP6] =
vlib_node_add_next (vm, udp6_local_node.index, udp6_input_node.index);
+
+ um->default_mtu = 1500;
return 0;
}
};
/* *INDENT-ON* */
-
-static clib_error_t *
-show_udp_punt_fn (vlib_main_t * vm, unformat_input_t * input,
- vlib_cli_command_t * cmd_arg)
-{
- udp_main_t *um = vnet_get_udp_main ();
-
- clib_error_t *error = NULL;
-
- if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- return clib_error_return (0, "unknown input `%U'", format_unformat_error,
- input);
-
- udp_dst_port_info_t *port_info;
- if (um->punt_unknown4)
- {
- vlib_cli_output (vm, "IPv4 UDP punt: enabled");
- }
- else
- {
- u8 *s = NULL;
- vec_foreach (port_info, um->dst_port_infos[UDP_IP4])
- {
- if (udp_is_valid_dst_port (port_info->dst_port, 1))
- {
- s = format (s, (!s) ? "%d" : ", %d", port_info->dst_port);
- }
- }
- s = format (s, "%c", 0);
- vlib_cli_output (vm, "IPV4 UDP ports punt : %s", s);
- }
-
- if (um->punt_unknown6)
- {
- vlib_cli_output (vm, "IPv6 UDP punt: enabled");
- }
- else
- {
- u8 *s = NULL;
- vec_foreach (port_info, um->dst_port_infos[UDP_IP6])
- {
- if (udp_is_valid_dst_port (port_info->dst_port, 01))
- {
- s = format (s, (!s) ? "%d" : ", %d", port_info->dst_port);
- }
- }
- s = format (s, "%c", 0);
- vlib_cli_output (vm, "IPV6 UDP ports punt : %s", s);
- }
-
- return (error);
-}
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (show_tcp_punt_command, static) =
-{
- .path = "show udp punt",
- .short_help = "show udp punt [ipv4|ipv6]",
- .function = show_udp_punt_fn,
-};
-/* *INDENT-ON* */
-
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff