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-rw-r--r--src/ipcpd/unicast/pol/ca-mb-ecn.c216
-rw-r--r--src/ipcpd/unicast/pol/ca-mb-ecn.h50
-rw-r--r--src/ipcpd/unicast/pol/ca-nop.c93
-rw-r--r--src/ipcpd/unicast/pol/ca-nop.h50
-rw-r--r--src/ipcpd/unicast/pol/link_state.c6
5 files changed, 414 insertions, 1 deletions
diff --git a/src/ipcpd/unicast/pol/ca-mb-ecn.c b/src/ipcpd/unicast/pol/ca-mb-ecn.c
new file mode 100644
index 00000000..2de8f8e7
--- /dev/null
+++ b/src/ipcpd/unicast/pol/ca-mb-ecn.c
@@ -0,0 +1,216 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2020
+ *
+ * Multi-bit ECN Congestion Avoidance
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200809L
+#endif
+
+#include "config.h"
+
+#include <ouroboros/ipcp-dev.h>
+#include <ouroboros/time_utils.h>
+
+#include "ca-mb-ecn.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+/* congestion avoidance constants */
+#define CA_SHFT 5
+#define CA_WND (1 << CA_SHFT)
+#define CA_UPD (1 << (CA_SHFT - 3))
+#define CA_SLOT 18
+#define CA_AI 20000
+#define ECN_Q_SHFT 5
+#define ts_to_ns(ts) (ts.tv_sec * BILLION + ts.tv_nsec)
+
+struct mb_ecn_ctx {
+ uint16_t rx_ece; /* level of congestion (upstream) */
+ size_t rx_ctr; /* receiver side packet counter */
+
+ uint16_t tx_ece; /* level of congestion (downstream) */
+ size_t tx_ctr; /* sender side packet counter */
+ size_t tx_aps; /* average packet size */
+ time_t tx_wnd; /* tgt time to send packets (ns) */
+ bool tx_cav; /* Congestion avoidance */
+ size_t tx_slot;
+
+ struct timespec t_sent; /* last sent packet */
+};
+
+struct pol_ca_ops mb_ecn_ca_ops = {
+ .ctx_create = mb_ecn_ctx_create,
+ .ctx_destroy = mb_ecn_ctx_destroy,
+ .ctx_update_snd = mb_ecn_ctx_update_snd,
+ .ctx_update_rcv = mb_ecn_ctx_update_rcv,
+ .ctx_update_ece = mb_ecn_ctx_update_ece,
+ .wnd_wait = mb_ecn_wnd_wait,
+ .calc_ecn = mb_ecn_calc_ecn
+};
+
+void * mb_ecn_ctx_create(void)
+{
+
+ struct mb_ecn_ctx * ctx;
+
+ ctx = malloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return NULL;
+
+ memset(ctx, 0, sizeof(*ctx));
+
+ return (void *) ctx;
+}
+
+void mb_ecn_ctx_destroy(void * ctx)
+{
+ free(ctx);
+}
+
+ca_wnd_t mb_ecn_ctx_update_snd(void * _ctx,
+ size_t len)
+{
+ struct timespec now;
+ size_t slot;
+ time_t gap;
+ ca_wnd_t wnd;
+
+ struct mb_ecn_ctx * ctx = _ctx;
+
+ clock_gettime(PTHREAD_COND_CLOCK, &now);
+
+ if (ctx->tx_wnd == 0) { /* 10 ms initial window estimate */
+ ctx->tx_wnd = 10 * MILLION;
+ gap = ctx->tx_wnd >> CA_SHFT;
+ ctx->tx_aps = len >> CA_SHFT;
+ ctx->tx_slot = ts_to_ns(now) >> CA_SLOT;
+ } else {
+ gap = ts_diff_ns(&ctx->t_sent, &now);
+ ctx->tx_aps -= ctx->tx_aps >> CA_SHFT;
+ ctx->tx_aps += len;
+ }
+
+ ctx->t_sent = now;
+
+ slot = ts_to_ns(now) >> CA_SLOT;
+
+ ctx->tx_ctr++;
+
+ if (slot - ctx->tx_slot > 0) {
+ ctx->tx_slot = slot;
+
+ if (ctx->tx_ctr > CA_WND)
+ ctx->tx_ece = 0;
+
+ /* Slow start */
+ if (!ctx->tx_cav) {
+ ctx->tx_wnd >>= 1;
+ /* Multiplicative Decrease */
+ } else if (ctx->tx_ece) { /* MD */
+ ctx->tx_wnd += (ctx->tx_wnd * ctx->tx_ece)
+ >> (CA_SHFT + 8);
+ /* Additive Increase */
+ } else {
+ size_t bw = ctx->tx_aps * BILLION / ctx->tx_wnd;
+ bw += CA_AI;
+ ctx->tx_wnd = ctx->tx_aps * BILLION / bw;
+ }
+ }
+
+ wnd.wait = (ctx->tx_wnd >> CA_SHFT) - gap;
+
+ return wnd;
+}
+
+void mb_ecn_wnd_wait(ca_wnd_t wnd)
+{
+ if (wnd.wait > 0) {
+ struct timespec s = {0, 0};
+ if (wnd.wait > BILLION) /* Don't care throttling < 1pps */
+ s.tv_sec = 1;
+ else
+ s.tv_nsec = wnd.wait;
+
+ nanosleep(&s, NULL);
+ }
+}
+
+bool mb_ecn_ctx_update_rcv(void * _ctx,
+ size_t len,
+ uint8_t ecn,
+ uint16_t * ece)
+{
+ struct mb_ecn_ctx* ctx = _ctx;
+ bool update;
+
+ (void) len;
+
+ if ((ctx->rx_ece | ecn) == 0)
+ return false;
+
+ if (ecn == 0) {
+ /* end of congestion */
+ ctx->rx_ece >>= 2;
+ update = ctx->rx_ece == 0;
+ } else {
+ if (ctx->rx_ece == 0) {
+ /* start of congestion */
+ ctx->rx_ece = ecn;
+ ctx->rx_ctr = 0;
+ update = true;
+ } else {
+ /* congestion update */
+ ctx->rx_ece -= ctx->rx_ece >> CA_SHFT;
+ ctx->rx_ece += ecn;
+ update = (ctx->rx_ctr++ & (CA_UPD - 1)) == true;
+ }
+ }
+
+ *ece = ctx->rx_ece;
+
+ return update;
+}
+
+
+void mb_ecn_ctx_update_ece(void * _ctx,
+ uint16_t ece)
+{
+ struct mb_ecn_ctx* ctx = _ctx;
+
+ ctx->tx_ece = ece;
+ ctx->tx_ctr = 0;
+ ctx->tx_cav = true;
+}
+
+uint8_t mb_ecn_calc_ecn(int fd,
+ size_t len)
+{
+ size_t q;
+
+ (void) len;
+
+ q = ipcp_flow_queued(fd);
+
+ return (uint8_t) (q >> ECN_Q_SHFT);
+}
diff --git a/src/ipcpd/unicast/pol/ca-mb-ecn.h b/src/ipcpd/unicast/pol/ca-mb-ecn.h
new file mode 100644
index 00000000..456b9b13
--- /dev/null
+++ b/src/ipcpd/unicast/pol/ca-mb-ecn.h
@@ -0,0 +1,50 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2020
+ *
+ * Multi-bit ECN Congestion Avoidance
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#ifndef OUROBOROS_IPCPD_UNICAST_CA_MB_ECN_H
+#define OUROBOROS_IPCPD_UNICAST_CA_MB_ECN_H
+
+#include "pol-ca-ops.h"
+
+void * mb_ecn_ctx_create(void);
+
+void mb_ecn_ctx_destroy(void * ctx);
+
+ca_wnd_t mb_ecn_ctx_update_snd(void * ctx,
+ size_t len);
+
+bool mb_ecn_ctx_update_rcv(void * ctx,
+ size_t len,
+ uint8_t ecn,
+ uint16_t * ece);
+
+void mb_ecn_ctx_update_ece(void * ctx,
+ uint16_t ece);
+
+void mb_ecn_wnd_wait(ca_wnd_t wnd);
+
+uint8_t mb_ecn_calc_ecn(int fd,
+ size_t len);
+
+extern struct pol_ca_ops mb_ecn_ca_ops;
+
+#endif /* OUROBOROS_IPCPD_UNICAST_CA_MB_ECN_H */
diff --git a/src/ipcpd/unicast/pol/ca-nop.c b/src/ipcpd/unicast/pol/ca-nop.c
new file mode 100644
index 00000000..d0d89a2e
--- /dev/null
+++ b/src/ipcpd/unicast/pol/ca-nop.c
@@ -0,0 +1,93 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2020
+ *
+ * Dummy Congestion Avoidance
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#include "ca-nop.h"
+
+#include <string.h>
+
+struct pol_ca_ops nop_ca_ops = {
+ .ctx_create = nop_ctx_create,
+ .ctx_destroy = nop_ctx_destroy,
+ .ctx_update_snd = nop_ctx_update_snd,
+ .ctx_update_rcv = nop_ctx_update_rcv,
+ .ctx_update_ece = nop_ctx_update_ece,
+ .wnd_wait = nop_wnd_wait,
+ .calc_ecn = nop_calc_ecn
+};
+
+void * nop_ctx_create(void)
+{
+ return (void *) 1;
+}
+
+void nop_ctx_destroy(void * ctx)
+{
+ (void) ctx;
+}
+
+ca_wnd_t nop_ctx_update_snd(void * ctx,
+ size_t len)
+{
+ ca_wnd_t wnd;
+
+ (void) ctx;
+ (void) len;
+
+ memset(&wnd, 0, sizeof(wnd));
+
+ return wnd;
+}
+
+void nop_wnd_wait(ca_wnd_t wnd)
+{
+ (void) wnd;
+}
+
+bool nop_ctx_update_rcv(void * ctx,
+ size_t len,
+ uint8_t ecn,
+ uint16_t * ece)
+{
+ (void) ctx;
+ (void) len;
+ (void) ecn;
+ (void) ece;
+
+ return false;
+}
+
+void nop_ctx_update_ece(void * ctx,
+ uint16_t ece)
+{
+ (void) ctx;
+ (void) ece;
+}
+
+
+uint8_t nop_calc_ecn(int fd,
+ size_t len)
+{
+ (void) fd;
+ (void) len;
+
+ return 0;
+}
diff --git a/src/ipcpd/unicast/pol/ca-nop.h b/src/ipcpd/unicast/pol/ca-nop.h
new file mode 100644
index 00000000..baf649d8
--- /dev/null
+++ b/src/ipcpd/unicast/pol/ca-nop.h
@@ -0,0 +1,50 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2020
+ *
+ * Dummy Congestion Avoidance
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#ifndef OUROBOROS_IPCPD_UNICAST_CA_NOP_H
+#define OUROBOROS_IPCPD_UNICAST_CA_NOP_H
+
+#include "pol-ca-ops.h"
+
+void * nop_ctx_create(void);
+
+void nop_ctx_destroy(void * ctx);
+
+ca_wnd_t nop_ctx_update_snd(void * ctx,
+ size_t len);
+
+bool nop_ctx_update_rcv(void * ctx,
+ size_t len,
+ uint8_t ecn,
+ uint16_t * ece);
+
+void nop_ctx_update_ece(void * ctx,
+ uint16_t ece);
+
+void nop_wnd_wait(ca_wnd_t wnd);
+
+uint8_t nop_calc_ecn(int fd,
+ size_t len);
+
+extern struct pol_ca_ops nop_ca_ops;
+
+#endif /* OUROBOROS_IPCPD_UNICAST_CA_NOP_H */
diff --git a/src/ipcpd/unicast/pol/link_state.c b/src/ipcpd/unicast/pol/link_state.c
index d9482876..ca8a7c50 100644
--- a/src/ipcpd/unicast/pol/link_state.c
+++ b/src/ipcpd/unicast/pol/link_state.c
@@ -812,8 +812,12 @@ static void handle_event(void * self,
switch (event) {
case NOTIFY_DT_CONN_ADD:
pthread_rwlock_rdlock(&ls.db_lock);
+
+ pthread_cleanup_push((void (*) (void *)) pthread_rwlock_unlock,
+ (void *) &ls.db_lock);
+
send_lsm(ipcpi.dt_addr, c->conn_info.addr, 0);
- pthread_rwlock_unlock(&ls.db_lock);
+ pthread_cleanup_pop(true);
if (lsdb_add_nb(c->conn_info.addr, c->flow_info.fd, NB_DT))
log_dbg("Failed to add neighbor to LSDB.");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 06:22:01 +0000