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uplink_thread.c
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/*
* BSD LICENSE
*
* Copyright(c) 2007-2017 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* version: RWPA_VNF.L.18.02.0-42
*/
#include <unistd.h>
#include <rte_common.h>
#include <rte_malloc.h>
#include <rte_cycles.h>
#include <rte_timer.h>
#include <rte_hash.h>
#include <rte_log.h>
#include <rte_rwlock.h>
#include <rte_ip.h>
#include <rte_string_fns.h>
#include "app.h"
#include "parser.h"
#include "thread.h"
#include "ring.h"
#include "poll_wrr.h"
#include "r-wpa_global_vars.h"
#include "key.h"
#include "ccmp_sa.h"
#include "station.h"
#include "vap.h"
#include "store.h"
#include "meta.h"
#include "wpapt_cdi.h"
#include "wpapt_cdi_helper.h"
#include "classifier.h"
#include "arp.h"
#include "gre.h"
#include "udp.h"
#include "vap_hdrs.h"
#include "ieee80211.h"
#include "ieee80211_utils.h"
#include "crypto.h"
#include "ccmp.h"
#include "convert.h"
#include "tls_socket.h"
#include "vap_frag.h"
#include "cycle_capture.h"
#ifdef RWPA_STATS_CAPTURE
#include "statistics_capture.h"
#endif
#include "uplink_macros.h"
#include "uplink_thread.h"
#define UL_NUM_SRC_PORTS 1
#define UL_NUM_DST_PORTS 2
#define UL_NUM_PORTS UL_NUM_SRC_PORTS + \
UL_NUM_DST_PORTS
#define UL_SRC_PORT 0
#define UL_DST_PORT_WAG 0
#define UL_DST_PORT_AP 1
#define UL_TP_TLS_MEMPOOL_ID "tls_mempool_id"
extern volatile int force_quit;
struct app_params *g_app;
static struct app_thread_params *tp_uplink;
static struct app_addr_params *addr_params;
struct ether_addr *vnfd_eth_addr_to_ap;
struct ether_addr *vnfd_eth_addr_to_wag;
static struct src_port_params src_ports[UL_NUM_SRC_PORTS];
static struct dst_port_params dst_ports[UL_NUM_DST_PORTS];
#ifndef RWPA_UL_NO_TLS_POLLING
static struct tls_socket *tls;
static uint32_t tls_mempool_id;
static struct poll_wrr_elem *wrr_elements[MAX_UL_WRR_ELEMS];
static void tls_dequeue(uint64_t cur_tsc);
#endif
static void pmd_dequeue(uint64_t cur_tsc);
static void *
thread_uplink_init(struct app_thread_params *p, void *arg)
{
unsigned lcore_id, socket_id;
g_app = (struct app_params *)arg;
tp_uplink = p;
addr_params = &g_app->addr_params;
lcore_id = rte_lcore_id();
socket_id = rte_socket_id();
unsigned n_ports_in = tp_uplink->n_ports_in;
unsigned n_ports_out = tp_uplink->n_ports_out;
if (n_ports_in > UL_NUM_SRC_PORTS || n_ports_out > UL_NUM_DST_PORTS)
rte_exit(EXIT_FAILURE,
"More than %d src or %d dst port assigned to uplink\n",
UL_NUM_SRC_PORTS, UL_NUM_DST_PORTS);
else if ((n_ports_in + n_ports_out) != UL_NUM_PORTS)
rte_exit(EXIT_FAILURE,
"Must be exactly %d ports assigned to uplink\n",
UL_NUM_PORTS);
/* get src port info */
src_ports[UL_SRC_PORT].port_id =
thread_port_in_get_id(&tp_uplink->port_in[UL_SRC_PORT]);
/* get WAG dest port info */
dst_ports[UL_DST_PORT_WAG].port_id =
thread_port_out_get_id(&tp_uplink->port_out[UL_DST_PORT_WAG]);
dst_ports[UL_DST_PORT_WAG].queue_id =
thread_port_out_get_queue_id(&tp_uplink->port_out[UL_DST_PORT_WAG]);
dst_ports[UL_DST_PORT_WAG].tx_buffer =
thread_port_out_get_tx_buffer(&tp_uplink->port_out[UL_DST_PORT_WAG]);
/* get AP dest port info */
dst_ports[UL_DST_PORT_AP].port_id =
thread_port_out_get_id(&tp_uplink->port_out[UL_DST_PORT_AP]);
dst_ports[UL_DST_PORT_AP].queue_id =
thread_port_out_get_queue_id(&tp_uplink->port_out[UL_DST_PORT_AP]);
dst_ports[UL_DST_PORT_AP].tx_buffer =
thread_port_out_get_tx_buffer(&tp_uplink->port_out[UL_DST_PORT_AP]);
/* save vnfd ethernet addresses from link parameters */
vnfd_eth_addr_to_ap = &g_app->link_params[dst_ports[UL_DST_PORT_AP].port_id].mac_addr;
vnfd_eth_addr_to_wag = &g_app->link_params[dst_ports[UL_DST_PORT_WAG].port_id].mac_addr;
#ifndef RWPA_UL_NO_TLS_POLLING
/* initialise wrr elements from config file */
struct poll_wrr_elem *wrr_elem_pmd = NULL;
wrr_elem_pmd = malloc(sizeof(struct poll_wrr_elem));
RWPA_CHECK_NOT_NULL(wrr_elem_pmd);
wrr_elem_pmd->allocated_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * g_app->misc_params.uplink_pmd_us;
wrr_elem_pmd->p_func = pmd_dequeue;
wrr_elements[0] = wrr_elem_pmd;
struct poll_wrr_elem *wrr_elem_tls = malloc(sizeof(struct poll_wrr_elem));
RWPA_CHECK_NOT_NULL(wrr_elem_tls);
wrr_elem_tls->allocated_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * g_app->misc_params.uplink_tls_us;
wrr_elem_tls->p_func = tls_dequeue;
wrr_elements[1] = wrr_elem_tls;
/* find the tls mempool id */
int tls_mempool_id_rd_sts = -1;
for (uint32_t i = 0; i < tp_uplink->n_args; i++) {
if (strcmp(tp_uplink->args_name[i], UL_TP_TLS_MEMPOOL_ID) == 0) {
tls_mempool_id_rd_sts = parser_read_uint32(&tls_mempool_id,
tp_uplink->args_value[i]);
}
}
if (tls_mempool_id_rd_sts != 0)
rte_exit(EXIT_FAILURE,
"Could not find valid %s thread param for %s\n",
UL_TP_TLS_MEMPOOL_ID,
tp_uplink->name);
/* initialise tls socket */
tls = malloc(sizeof(struct tls_socket));
RWPA_CHECK_NOT_NULL(tls);
tls_socket_init(tls, tls_handlers, g_app->mempool[tls_mempool_id],
addr_params->vnfc_tls_ss_ip, addr_params->vnfc_tls_ss_port,
&g_app->misc_params);
#endif
RTE_LOG(INFO, RWPA_UL,
"%s (%s): Initializing on lcore %u (socket %u)\n",
tp_uplink->name, tp_uplink->type, lcore_id, socket_id);
return NULL;
}
#ifndef RWPA_UL_NO_TLS_POLLING
static void
eapols_process(struct pkt_buffer *eapols_in)
{
unsigned i, j, k;
int wep_save;
struct rte_mbuf *m;
struct rwpa_meta meta[MAX_PKT_BURST] = {0};
struct ether_addr *sta_addrs[MAX_PKT_BURST];
uint32_t nb_sta_addrs = 0;
int32_t found[MAX_PKT_BURST];
struct pkt_buffer eapols_crypto_in __rte_cache_aligned;
struct rwpa_meta *meta_crypto_in[MAX_PKT_BURST] = {0};
#ifndef RWPA_NO_CRYPTO
struct pkt_buffer eapols_crypto_out __rte_cache_aligned;
uint16_t nb_crypto_enq, nb_crypto_deq;
uint16_t nb_crypto_deq_success, nb_crypto_deq_success_acc;
uint8_t crypto_enq_success[MAX_PKT_BURST] = {0};
uint8_t crypto_deq_success[MAX_PKT_BURST] = {0};
eapols_crypto_out.len = 0;
#else
UNUSED(k);
UNUSED(meta_crypto_in);
#endif
eapols_crypto_in.len = 0;
for (i = 0; i < eapols_in->len; i++) {
m = eapols_in->buffer[i];
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
/*
* 802.11 HEADER PARSE
*/
ieee80211_packet_parse(eapols_in->buffer[i], &meta[i]);
/*
* 802.11 PACKET CLASSIFY
* - for group handshake EAPOLs received from HostAPD, the
* wep flag seems to be set in the 802.11 header,
* even though the packet isn't encrypted. This throws the
* ieee80211_packet_classify() function off as it expects
* a CCMP header to be present if the wep bit is set
* - the flag is cleared in the meta info so as to keep the
* classify happy. The correct value of the flag is set
* back then later
*/
wep_save = meta[i].wep;
meta[i].wep = FALSE;
enum ieee80211_pkt_type pkt_type =
ieee80211_packet_classify(m, &meta[i]);
if (pkt_type == IEEE80211_PKT_TYPE_EAPOL) {
/*
* get the destination station address for the
* store lookup and reset the wep flag
* in the meta info
*/
sta_addrs[nb_sta_addrs++] = meta[i].p_sta_addr;
meta[i].wep = wep_save;
} else {
CTRL_LOG_AND_DROP(eapols_in->buffer[i], ERR, RWPA_UL,
"Non-EAPOL 802.11 frame received over TLS, dropping\n",
STATS_CTRL_DROPS_TYPE_UNEXPECTED_PACKET_TYPE);
}
}
/*
* STORE LOOKUP
* - search the store for each of the stations
*/
store_sta_bulk_lookup(sta_addrs, nb_sta_addrs, found);
for (i = 0, j = 0; i < eapols_in->len; i++) {
m = eapols_in->buffer[i];
if (likely(m != NULL && j < nb_sta_addrs)) {
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
if (found[j] >= 0) {
/*
* STATION FOUND
*/
/* get the station and lock it */
meta[i].sta = store_sta_get(found[j]);
sta_read_lock(meta[i].sta);
/* get the PTK SA, PTK's encrypt counter and vAP */
sta_encrypt_data_get(meta[i].sta, &(meta[i].sa),
&(meta[i].counter), &(meta[i].vap));
/*
* check is there a key for this station
* - i.e. has it been authorized
*/
if (meta[i].sa != NULL &&
meta[i].sa->tk_len > 0) {
/*
* CCMP ENCAP
* - add the CCMP header and space for the MIC
*/
if (unlikely(ccmp_encap(m, &meta[i]) != RWPA_STS_OK)) {
sta_read_unlock(meta[i].sta);
CTRL_LOG_AND_DROP(eapols_in->buffer[i], ERR, RWPA_UL,
"Error adding CCMP header to EAPOL packet, dropping\n",
STATS_CTRL_DROPS_TYPE_PACKET_ENCAP_ERROR);
} else {
/* setup the array of packets to be encrypted */
eapols_crypto_in.buffer[eapols_crypto_in.len] = m;
meta_crypto_in[eapols_crypto_in.len] = &meta[i];
eapols_crypto_in.len++;
}
} else {
sta_read_unlock(meta[i].sta);
}
} else {
/*
* STATION NOT FOUND
* - drop the packet
*/
CTRL_LOG_AND_DROP(eapols_in->buffer[i], ERR, RWPA_UL,
"Station not found, dropping\n",
STATS_CTRL_DROPS_TYPE_STATION_NOT_FOUND);
}
j++;
}
}
#ifndef RWPA_NO_CRYPTO
/*
* CCMP ENCRYPTION
* - enqueue packets for encryption
*/
nb_crypto_enq = ccmp_burst_enqueue(eapols_crypto_in.buffer, eapols_crypto_in.len,
meta_crypto_in, CCMP_OP_ENCRYPT,
tp_uplink->crypto_qp, crypto_enq_success);
/*
* dequeue packets from crypto devices
* - the same number of packets that were enqueued must be dequeued
* This loop will continue until all crypto ops are dequeued.
*/
nb_crypto_deq_success_acc = 0;
do {
nb_crypto_deq_success = 0;
nb_crypto_deq = ccmp_burst_dequeue((eapols_crypto_out.buffer + eapols_crypto_out.len),
(nb_crypto_enq - eapols_crypto_out.len),
tp_uplink->crypto_qp, &nb_crypto_deq_success,
(crypto_deq_success + eapols_crypto_out.len));
eapols_crypto_out.len += nb_crypto_deq;
nb_crypto_deq_success_acc += nb_crypto_deq_success;
} while ((!force_quit) && (eapols_crypto_out.len < nb_crypto_enq));
/*
* CRYPTO TIDYUP
*/
/* log error for any failed crypto ops */
if (unlikely(nb_crypto_deq_success_acc < eapols_crypto_in.len)) {
UL_CTRL_DROP_STAT_INC(STATS_CTRL_DROPS_TYPE_ENCRYPTION_ERROR,
(eapols_crypto_in.len - nb_crypto_deq_success_acc));
#ifdef RWPA_EXTRA_DEBUG
RTE_LOG(ERR, RWPA_UL,
"CCMP encryption failed for %d out of %d "
"EAPOL packets, dropping\n",
(eapols_crypto_in.len - nb_crypto_deq_success_acc),
eapols_crypto_in.len);
#endif
}
#endif
/* unlock station and free mbuf for any failed crypto ops */
for (i = 0, j = 0, k = 0; i < eapols_in->len; i++) {
if (eapols_in->buffer[i] != NULL &&
meta[i].sa != NULL &&
meta[i].sa->tk_len > 0) {
sta_read_unlock(meta[i].sta);
#ifndef RWPA_NO_CRYPTO
if (unlikely(j < eapols_crypto_in.len &&
crypto_enq_success[j++] == FALSE)) {
DROP(eapols_in->buffer[i]);
} else if (unlikely(k < nb_crypto_enq &&
crypto_deq_success[k++] == FALSE)) {
DROP(eapols_in->buffer[i]);
}
#endif
}
}
/*
* POST CRYPTO PROCESSING
*/
for (i = 0; i < eapols_in->len; i++) {
m = eapols_in->buffer[i];
if (likely(m != NULL)) {
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
/*
* VAP TLV ENCAP
* - add the vAP TLV
*/
if (unlikely(vap_tlv_encap(m) != RWPA_STS_OK)) {
CTRL_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding vAP TLV, dropping\n",
STATS_CTRL_DROPS_TYPE_PACKET_ENCAP_ERROR);
/*
* VAP HEADER ENCAP
* - add the inner Ethernet and vAP headers
*/
} else if (unlikely(vap_hdr_encap(m,
FALSE, FALSE, 0,
vnfd_eth_addr_to_ap,
meta[i].p_sta_addr) != RWPA_STS_OK)) {
CTRL_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding vAP headers, dropping\n",
STATS_CTRL_DROPS_TYPE_PACKET_ENCAP_ERROR);
/*
* AP TUNNEL ENCAP
* - add the outer Ethernet, IP and UDP/GRE headers
* - NOTE: not locking the vap element before accessing the
* tunnel addresses, as these addresses should hardly ever
* change
* - even if the vap element is being/has been reset and
* garbage addresses are used, it's not a big deal as
* that vap is no longer live and the packet won't be
* delivered through it anyways
*/
#ifndef RWPA_AP_TUNNELLING_GRE
} else if (unlikely(meta[i].vap == NULL ||
meta[i].vap->tun_port == addr_params->vap_tun_def_port ||
udp_encap(m, addr_params->vnfd_port_to_ap,
addr_params->vnfd_ip_to_ap,
vnfd_eth_addr_to_ap,
meta[i].vap->tun_port,
meta[i].vap->tun_ip,
&(meta[i].vap->tun_mac)) != RWPA_STS_OK)) {
if (meta[i].vap != NULL &&
meta[i].vap->tun_port == addr_params->vap_tun_def_port) {
CTRL_LOG_AND_DROP(m, DEBUG, RWPA_UL,
"No tunnel port set for AP, dropping\n",
STATS_CTRL_DROPS_TYPE_NO_AP_TUNNEL_PORT);
} else {
CTRL_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding AP tunnel headers, dropping\n",
STATS_CTRL_DROPS_TYPE_PACKET_ENCAP_ERROR);
}
#else
} else if (unlikely(meta[i].vap == NULL ||
gre_encap(m, addr_params->vnfd_ip_to_ap,
vnfd_eth_addr_to_ap,
meta[i].vap->tun_ip,
&(meta[i].vap->tun_mac), 0, 0) != RWPA_STS_OK)) {
CTRL_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding AP tunnel headers, dropping\n",
STATS_CTRL_DROPS_TYPE_PACKET_ENCAP_ERROR);
#endif
/*
* WRITE TO TX BUFFER
*/
} else {
rte_eth_tx_buffer(dst_ports[UL_DST_PORT_AP].port_id,
dst_ports[UL_DST_PORT_AP].queue_id,
dst_ports[UL_DST_PORT_AP].tx_buffer, m);
}
}
}
}
static void
tls_dequeue(uint64_t cur_tsc)
{
unsigned i, j;
struct rte_mbuf *m;
struct pkt_buffer pkts_in __rte_cache_aligned;
struct pkt_buffer eapols __rte_cache_aligned;
UNUSED(cur_tsc);
pkts_in.len = poll_sock(tls, pkts_in.buffer, MAX_PKT_BURST);
eapols.len = 0;
for (i = 0; i < pkts_in.len; i++) {
RWPA_CHECK_ARRAY_OFFSET(i, MAX_PKT_BURST - 1);
m = pkts_in.buffer[i];
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
struct wpapt_cdi_msg_header *data = rte_pktmbuf_mtod(m, struct wpapt_cdi_msg_header *);
uint16_t type = data->message_id;
for (j = 0; tls->ctx[j].type != EOL; j++) {
if (tls->ctx[j].cmd == type) {
if (wpapt_cdi_hdr_decap(m) == RWPA_STS_OK) {
unsigned action = tls->ctx[j].handler(m);
switch (action) {
case TLS_HANDLER_ACTION_PROCESS:
eapols.buffer[eapols.len++] = m;
break;
case TLS_HANDLER_ACTION_TLS_TX:
tls_socket_write(tls, m);
break;
case TLS_HANDLER_ACTION_ERROR:
CTRL_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error handling WPAPT message, dropping\n",
STATS_CTRL_DROPS_TYPE_MSG_HANDLING_ERROR);
break;
case TLS_HANDLER_ACTION_NONE:
default:
rte_pktmbuf_free(m);
break;
}
} else {
CTRL_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error removing WPAPT header, dropping\n",
STATS_CTRL_DROPS_TYPE_PACKET_DECAP_ERROR);
}
break;
}
}
if (tls->ctx[j].type == EOL) {
#ifdef RWPA_EXTRA_DEBUG
RTE_LOG(ERR, RWPA_UL,
"Unknown WPAPT message type [%d] received, dropping\n",
type);
#endif
UL_CTRL_DROP_STAT_INC(STATS_UL_DROPS_TYPE_UNEXPECTED_PACKET_TYPE, 1);
DROP(m);
}
}
/*
* process the EAPOL packets
*/
eapols_process(&eapols);
}
#endif
static void
ap_tunnel_packets_process(struct pkt_buffer *pkts_in, uint64_t cur_tsc)
{
unsigned i, j, k;
struct rte_mbuf *m;
struct rwpa_meta meta[MAX_PKT_BURST] = {0};
struct ether_addr *sta_addrs[MAX_PKT_BURST];
uint32_t nb_sta_addrs = 0;
int32_t found[MAX_PKT_BURST];
#ifndef RWPA_NO_CRYPTO
struct pkt_buffer pkts_crypto_in __rte_cache_aligned;
struct pkt_buffer pkts_crypto_out __rte_cache_aligned;
struct rwpa_meta *meta_crypto_in[MAX_PKT_BURST] = {0};
uint16_t nb_crypto_enq, nb_crypto_deq;
uint16_t nb_crypto_deq_success, nb_crypto_deq_success_acc;
uint8_t crypto_enq_success[MAX_PKT_BURST] = {0};
uint8_t crypto_deq_success[MAX_PKT_BURST] = {0};
pkts_crypto_in.len = 0;
pkts_crypto_out.len = 0;
#else
UNUSED(k);
#endif
/*
* RX HEADERS DECAPSULATION
*/
for (i = 0; i < pkts_in->len; i++) {
m = pkts_in->buffer[i];
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
/*
* AP TUNNEL DECAP
* - remove the AP tunnelling headers
* i.e. outer Ethernet, IP and UDP/GRE headers
*/
if (unlikely(AP_TUNNEL_DECAP(m, &meta[i]) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"Error removing AP tunnelling headers, dropping\n",
STATS_UL_DROPS_TYPE_PACKET_DECAP_ERROR);
/*
* VAP HEADERS PARSE
* - parse the inner Ethernet and vAP headers
*/
} else if (unlikely(VAP_HDR_PARSE(m, &meta[i]) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"Error parsing vAP headers, dropping\n",
STATS_UL_DROPS_TYPE_PACKET_DECAP_ERROR);
} else {
/* check is the packet fragmented */
if (unlikely(meta[i].fragment)) {
/*
* REASSEMBLE
*
* the packet is fragmented
* - need to reassemble the fragments of the packet
* before continuing
* - there should only be at most 2 fragments in
* a fragmented packet
* - fragments of the same packet are identified by
* the Source MAC Address and vAP Sequence Number
*/
UL_VAP_PAYLOAD_REASSEMBLE_CYCLE_CAPTURE_START;
if (unlikely(vap_payload_reassemble(
m, &m, cur_tsc, &meta[i]) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error reassembling packet, dropping\n",
STATS_UL_DROPS_TYPE_REASSEMBLY_ERROR);
/* has the packet been fully reassembled? */
} else if (m != NULL) {
/*
* LINEARIZE CHAINED FRAGMENTS
* - this is required for the crypto operation
* - if the MIC is split across 2 mbufs, then
* decryption is going to fail
*/
if (unlikely(rte_pktmbuf_linearize(m) != 0)) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error linearizing chained fragments, dropping\n",
STATS_UL_DROPS_TYPE_REASSEMBLY_ERROR);
}
}
pkts_in->buffer[i] = m;
UL_VAP_PAYLOAD_REASSEMBLE_CYCLE_CAPTURE_STOP;
}
/* have we still got an mbuf? */
if (likely(m != NULL)) {
/*
* VAP HEADERS DECAP
* - remove the inner Ethernet and vAP headers
*/
if (unlikely(VAP_HDR_DECAP(m) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"Error removing vAP headers, dropping\n",
STATS_UL_DROPS_TYPE_PACKET_DECAP_ERROR);
/*
* VAP TLV DECAP
* - remove the vAP TLV
*/
} else if (unlikely(VAP_TLV_DECAP(m) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"Error removing vAP TLV, dropping\n",
STATS_UL_DROPS_TYPE_PACKET_DECAP_ERROR);
} else {
/*
* 802.11 HEADER PARSE
*/
IEEE80211_PACKET_PARSE(m, &meta[i]);
/* get the source station address for the store lookup */
sta_addrs[nb_sta_addrs++] = meta[i].p_sta_addr;
}
}
}
}
/*
* STORE LOOKUP
* - search the store for each of the stations
*/
STORE_STA_BULK_LOOKUP(sta_addrs, nb_sta_addrs, found);
for (i = 0, j = 0; i < pkts_in->len; i++) {
m = pkts_in->buffer[i];
if (likely(m != NULL && j < nb_sta_addrs)) {
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
if (found[j] >= 0) {
/*
* STATION FOUND
*/
uint8_t tid = (meta[i].has_qc ? meta[i].p_qc->le.tid : 0);
/* get the station and lock it */
meta[i].sta = store_sta_get(found[j]);
STA_READ_LOCK(meta[i].sta);
/* get the PTK SA, PTK's decrypt counter and parent vAP */
STA_DECRYPT_DATA_GET(meta[i].sta, tid, &(meta[i].sa),
&(meta[i].counter), &(meta[i].vap));
#ifndef RWPA_DYNAMIC_AP_CONF_UPDATE_OFF
/* save the vAP's tunnel mac, ip and port */
vap_tun_mac_set(meta[i].vap, &(meta[i].vap_tun_mac));
vap_tun_ip_set(meta[i].vap, meta[i].vap_tun_ip);
#ifndef RWPA_AP_TUNNELLING_GRE
vap_tun_port_set(meta[i].vap, meta[i].vap_tun_port);
#endif
#endif
/* check is the packet encrypted */
if (likely(meta[i].wep)) {
/*
* ENCRYPTED
* - check is there a key for this station
* i.e. has it been authorized
*/
if (likely(meta[i].sa != NULL &&
meta[i].sa->tk_len > 0)) {
/*
* REPLAY DETECTION
*/
struct ccmp_hdr *ccmp_hdr =
rte_pktmbuf_mtod_offset(m,
struct ccmp_hdr *,
meta[i].wifi_hdr_sz);
if (unlikely(CCMP_REPLAY_DETECT(
ccmp_hdr, &(meta[i].counter)) == RWPA_STS_ERR)) {
STA_READ_UNLOCK(meta[i].sta);
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"Replay detected, dropping\n",
STATS_UL_DROPS_TYPE_REPLAY_DETECTED);
} else {
/*
* save the CCMP header PN to the store for next
* replay check
* NOTE: this function writes to the ptk_decrypt_ctr of
* the station, but the read lock has only been taken
* - this is ok as this is the only 'read' thread which
* will be touching this counter
*/
STA_PTK_DECRYPT_COUNTER_SET(meta[i].sta, tid, meta[i].counter);
#ifndef RWPA_NO_CRYPTO
/*
* setup the packets which have been successfully processed
* so far and are ready to be decrypted
*/
pkts_crypto_in.buffer[pkts_crypto_in.len] = m;
meta_crypto_in[pkts_crypto_in.len] = &meta[i];
pkts_crypto_in.len++;
#endif
}
} else {
/*
* NO KEY
* - drop the packet
*/
STA_READ_UNLOCK(meta[i].sta);
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"No key set for station, dropping\n",
STATS_UL_DROPS_TYPE_NO_STATION_KEY);
}
} else {
/*
* NOT ENCRYPTED
* - just unlock the station
*/
STA_READ_UNLOCK(meta[i].sta);
}
} else {
/*
* STATION NOT FOUND
* - drop the packet
*/
DATA_LOG_AND_DROP(pkts_in->buffer[i], ERR, RWPA_UL,
"Station not found, dropping\n",
STATS_UL_DROPS_TYPE_STATION_NOT_FOUND);
}
j++;
}
}
#ifndef RWPA_NO_CRYPTO
/*
* CCMP DECRYPTION
* - enqueue packets for decryption
*/
nb_crypto_enq = CCMP_BURST_ENQUEUE(pkts_crypto_in.buffer, pkts_crypto_in.len,
meta_crypto_in, CCMP_OP_DECRYPT,
tp_uplink->crypto_qp, crypto_enq_success);
/*
* dequeue packets from crypto devices
* - the same number of packets that were enqueued must be dequeued
*/
nb_crypto_deq_success_acc = 0;
do {
nb_crypto_deq_success = 0;
nb_crypto_deq = CCMP_BURST_DEQUEUE((pkts_crypto_out.buffer + pkts_crypto_out.len),
(nb_crypto_enq - pkts_crypto_out.len),
tp_uplink->crypto_qp, &nb_crypto_deq_success,
(crypto_deq_success + pkts_crypto_out.len));
pkts_crypto_out.len += nb_crypto_deq;
nb_crypto_deq_success_acc += nb_crypto_deq_success;
} while ((!force_quit) && (pkts_crypto_out.len < nb_crypto_enq));
CCMP_BURST_DEQUEUE_STATS(nb_crypto_enq, nb_crypto_deq_success_acc);
/*
* CRYPTO TIDYUP
*/
/* log error for any failed crypto ops */
if (unlikely(nb_crypto_deq_success_acc < pkts_crypto_in.len)) {
UL_DATA_DROP_STAT_INC(STATS_UL_DROPS_TYPE_DECRYPTION_ERROR,
(pkts_crypto_in.len - nb_crypto_deq_success_acc));
#ifdef RWPA_EXTRA_DEBUG
RTE_LOG(ERR, RWPA_UL,
"CCMP decryption failed for %d out of %d "
"packets, dropping\n",
(pkts_crypto_in.len - nb_crypto_deq_success_acc),
pkts_crypto_in.len);
#endif
}
#endif
/* unlock station and free mbuf for any failed crypto ops */
for (i = 0, j = 0, k = 0; i < pkts_in->len; i++) {
if (likely(pkts_in->buffer[i] != NULL &&
meta[i].wep)) {
STA_READ_UNLOCK(meta[i].sta);
#ifndef RWPA_NO_CRYPTO
if (unlikely(j < pkts_crypto_in.len &&
crypto_enq_success[j++] == FALSE)) {
DROP(pkts_in->buffer[i]);
} else if (unlikely(k < nb_crypto_enq &&
crypto_deq_success[k++] == FALSE)) {
DROP(pkts_in->buffer[i]);
}
#endif
}
}
/*
* POST CRYPTO PROCESSING
*/
for (i = 0, j = 0; i < pkts_in->len; i++) {
m = pkts_in->buffer[i];
if (likely(m != NULL)) {
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
/*
* 802.11 PACKET CLASSIFICATION
*/
enum ieee80211_pkt_type pkt_type =
IEEE80211_PACKET_CLASSIFY(m, &meta[i]);
if (likely(pkt_type == IEEE80211_PKT_TYPE_DATA)) {
/* DATA */
/*
* IEEE802.11 -> ETHERNET CONVERSION
* - handles CCMP decap
*/
if (unlikely(IEEE80211_TO_ETHER_CONVERT(
m, &meta[i]) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error converting packet to Ethernet, dropping\n",
STATS_UL_DROPS_TYPE_ETH_CONVERT_ERROR);
/*
* GRE ENCAP
* - add the outer Ethernet, IP and GRE headers
* - only if sending to a WAG
*/
} else if (unlikely(g_app->misc_params.no_wag == FALSE &&
GRE_ENCAP(m, addr_params->vnfd_ip_to_wag,
vnfd_eth_addr_to_wag,
addr_params->wag_tun_ip,
&(addr_params->wag_tun_mac)) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding GRE headers, dropping\n",
STATS_UL_DROPS_TYPE_DATA_PACKET_ENCAP_ERROR);
/*
* WRITE TO TX BUFFER
*/
} else {
RTE_ETH_TX_BUFFER(dst_ports[UL_DST_PORT_WAG].port_id,
dst_ports[UL_DST_PORT_WAG].queue_id,
dst_ports[UL_DST_PORT_WAG].tx_buffer, m);
}
} else if (pkt_type == IEEE80211_PKT_TYPE_EAPOL) {
/* EAPOL */
/*
* CCMP DECAP
* - remove the CCMP header and MIC
*/
if (meta[i].wep &&
CCMP_DECAP(m, &meta[i]) == RWPA_STS_ERR) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error removing CCMP header, dropping\n",
STATS_UL_DROPS_TYPE_PACKET_DECAP_ERROR);
/*
* WPAPT_CDI_MSG_FRAME ENCAP
* - add the wpapt_cdi_msg_frame encapsulation
*/
} else if (unlikely(WPAPT_CDI_FRAME_ENCAP(
m, &meta[i], m->data_len) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding TLS message frame, dropping\n",
STATS_UL_DROPS_TYPE_CTRL_PACKET_ENCAP_ERROR);
/*
* WPAPT_CDI_MSG_HEADER ENCAP
* -add the wpapt_cdi_msg_header
*/
} else if (unlikely(WPAPT_CDI_HDR_ENCAP(
m, WPAPT_CDI_MSG_FRAME, m->data_len) != RWPA_STS_OK)) {
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Error adding TLS message header, dropping\n",
STATS_UL_DROPS_TYPE_CTRL_PACKET_ENCAP_ERROR);
/*
* WRITE TO TLS SOCKET
*/
} else {
#ifndef RWPA_UL_NO_TLS_POLLING
TLS_SOCKET_WRITE(tls, m);
#endif
}
} else {
/* Something Else */
DATA_LOG_AND_DROP(m, ERR, RWPA_UL,
"Could not classify 802.11 packet, dropping\n",
STATS_UL_DROPS_TYPE_UNEXPECTED_PACKET_TYPE);
}
}
}
}
static void
uplink_pmd_packets_process(struct pkt_buffer *pkts_in, uint64_t cur_tsc)
{
unsigned i;
struct rte_mbuf *m;
struct pkt_buffer pkts_ap_tunnel __rte_cache_aligned;
pkts_ap_tunnel.len = 0;
for (i = 0; i < pkts_in->len; i++) {
m = pkts_in->buffer[i];
rte_prefetch0(rte_pktmbuf_mtod(m, void *));
enum outer_pkt_type type = INITIAL_PACKET_CLASSIFY(m);
switch (type) {
/*
* ARP
*/
case OUTER_PKT_TYPE_ARP:
if (arp_reply(m, dst_ports[UL_DST_PORT_AP].port_id, addr_params->vnfd_ip_to_ap))
rte_eth_tx_buffer(dst_ports[UL_DST_PORT_AP].port_id,
dst_ports[UL_DST_PORT_AP].queue_id,
dst_ports[UL_DST_PORT_AP].tx_buffer, m);
break;
/*
* ICMP
*/
case OUTER_PKT_TYPE_ICMP:
rte_pktmbuf_free(m);
break;
#ifndef RWPA_AP_TUNNELLING_GRE
/*
* UDP
*/
case OUTER_PKT_TYPE_UDP:
#else
/*
* GRE
*/
case OUTER_PKT_TYPE_GRE:
#endif
pkts_ap_tunnel.buffer[pkts_ap_tunnel.len++] = m;
break;