Merged in dstaesse/ouroboros/be-dealloc (pull request #293)

operf tool, bugfixing and small improvements

10 files changed, 663 insertions, 18 deletions

diff --git a/src/irmd/main.c b/src/irmd/main.c
index 2bb933c4..6e3f952f 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -974,7 +974,7 @@ static struct irm_flow * flow_accept(pid_t api, char ** dst_ae_name)
                 pthread_rwlock_rdlock(&irmd->state_lock);
                 if (irmd->state != IRMD_RUNNING) {
                         pthread_rwlock_unlock(&irmd->state_lock);
-                        break;
+                        return NULL;
                 }
                 pthread_rwlock_unlock(&irmd->state_lock);
         }
diff --git a/src/lib/dev.c b/src/lib/dev.c
index ec1cd696..4b97428e 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -1002,12 +1002,16 @@ int flow_event_wait(struct flow_set *       set,
         assert(!fq->next);
 
         ret = shm_flow_set_wait(ai.fqset, set->idx, fq->fqueue, timeout);
-        if (ret == -ETIMEDOUT)
+        if (ret == -ETIMEDOUT) {
+                fq->fqsize = 0;
                 return -ETIMEDOUT;
+        }
 
         fq->fqsize = ret;
 
-        return 0;
+        assert(ret);
+
+        return ret;
 }
 
 /* ipcp-dev functions */
@@ -1295,6 +1299,12 @@ int ipcp_flow_write(int fd, struct shm_du_buff * sdb)
         pthread_rwlock_rdlock(&ai.data_lock);
         pthread_rwlock_rdlock(&ai.flows_lock);
 
+        if (ai.flows[fd].port_id < 0) {
+                pthread_rwlock_unlock(&ai.flows_lock);
+                pthread_rwlock_unlock(&ai.data_lock);
+                return -ENOTALLOC;
+        }
+
         if ((ai.flows[fd].oflags & FLOW_O_ACCMODE) == FLOW_O_RDONLY) {
                 pthread_rwlock_unlock(&ai.flows_lock);
                 pthread_rwlock_unlock(&ai.data_lock);
@@ -1356,7 +1366,11 @@ int local_flow_write(int fd, size_t idx)
         pthread_rwlock_rdlock(&ai.data_lock);
         pthread_rwlock_rdlock(&ai.flows_lock);
 
-        assert(ai.flows[fd].tx_rb);
+        if (ai.flows[fd].port_id < 0) {
+                pthread_rwlock_unlock(&ai.flows_lock);
+                pthread_rwlock_unlock(&ai.data_lock);
+                return -ENOTALLOC;
+        }
 
         shm_rbuff_write(ai.flows[fd].tx_rb, idx);
 
diff --git a/src/lib/shm_flow_set.c b/src/lib/shm_flow_set.c
index 3b1af83f..6cc94573 100644
--- a/src/lib/shm_flow_set.c
+++ b/src/lib/shm_flow_set.c
@@ -376,22 +376,20 @@ ssize_t shm_flow_set_wait(const struct shm_flow_set * shm_set,
 
         while (shm_set->heads[idx] == 0 && ret != -ETIMEDOUT) {
                 if (timeout != NULL)
-                        ret = pthread_cond_timedwait(shm_set->conds + idx,
-                                                     shm_set->lock,
-                                                     &abstime);
+                        ret = -pthread_cond_timedwait(shm_set->conds + idx,
+                                                      shm_set->lock,
+                                                      &abstime);
                 else
-                        ret = pthread_cond_wait(shm_set->conds + idx,
-                                                shm_set->lock);
+                        ret = -pthread_cond_wait(shm_set->conds + idx,
+                                                 shm_set->lock);
 #ifndef __APPLE__
-                if (ret == EOWNERDEAD) {
+                if (ret == -EOWNERDEAD) {
                         LOG_DBG("Recovering dead mutex.");
                         pthread_mutex_consistent(shm_set->lock);
                 }
 #endif
-                if (ret == ETIMEDOUT) {
-                        ret = -ETIMEDOUT;
+                if (ret == -ETIMEDOUT)
                         break;
-                }
         }
 
         if (ret != -ETIMEDOUT) {
@@ -404,5 +402,7 @@ ssize_t shm_flow_set_wait(const struct shm_flow_set * shm_set,
 
         pthread_cleanup_pop(true);
 
+        assert(ret);
+
         return ret;
 }
diff --git a/src/tools/CMakeLists.txt b/src/tools/CMakeLists.txt
index e8c24557..e8181d5f 100644
--- a/src/tools/CMakeLists.txt
+++ b/src/tools/CMakeLists.txt
@@ -2,3 +2,4 @@ add_subdirectory(irm)
 add_subdirectory(echo)
 add_subdirectory(cbr)
 add_subdirectory(oping)
+add_subdirectory(operf)
diff --git a/src/tools/irm/irm_ipcp_bootstrap.c b/src/tools/irm/irm_ipcp_bootstrap.c
index 7d72eb15..98efe16d 100644
--- a/src/tools/irm/irm_ipcp_bootstrap.c
+++ b/src/tools/irm/irm_ipcp_bootstrap.c
@@ -196,8 +196,10 @@ int do_bootstrap_ipcp(int argc, char ** argv)
         }
 
         for (i = 0; i < len; i++)
-                if (irm_bootstrap_ipcp(apis[i], &conf))
+                if (irm_bootstrap_ipcp(apis[i], &conf)) {
+                        free(apis);
                         return -1;
+                }
 
         if (apis != NULL)
                 free(apis);
diff --git a/src/tools/operf/CMakeLists.txt b/src/tools/operf/CMakeLists.txt
new file mode 100644
index 00000000..b63d24ee
--- /dev/null
+++ b/src/tools/operf/CMakeLists.txt
@@ -0,0 +1,21 @@
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+find_library(LIBM_LIBRARIES m)
+if(NOT LIBM_LIBRARIES)
+  message(FATAL_ERROR "libm not found")
+endif()
+
+set(SOURCE_FILES
+        # Add source files here
+        operf.c
+)
+
+add_executable(operf ${SOURCE_FILES})
+
+target_link_libraries(operf LINK_PUBLIC ${LIBM_LIBRARIES} ouroboros)
+
+install(TARGETS operf RUNTIME DESTINATION usr/bin)
diff --git a/src/tools/operf/operf.c b/src/tools/operf/operf.c
new file mode 100644
index 00000000..b52109cf
--- /dev/null
+++ b/src/tools/operf/operf.c
@@ -0,0 +1,179 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Ouroboros perf application
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define _POSIX_C_SOURCE 199506L
+
+#include <ouroboros/fqueue.h>
+#include <ouroboros/dev.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define OPERF_BUF_SIZE (1024 * 1024)
+
+#define OPERF_MAX_FLOWS 256
+
+struct c {
+        char * s_apn;
+        int    size;
+        long   rate;
+        bool   flood;
+        int    duration;
+
+        size_t sent;
+        size_t rcvd;
+
+        flow_set_t * flows;
+        fqueue_t *   fq;
+
+        pthread_t reader_pt;
+        pthread_t writer_pt;
+} client;
+
+struct s {
+        struct timespec  times[OPERF_MAX_FLOWS];
+        flow_set_t *     flows;
+        fqueue_t *       fq;
+        pthread_mutex_t  lock;
+
+        uint8_t          buffer[OPERF_BUF_SIZE];
+        ssize_t          timeout;
+
+        pthread_t cleaner_pt;
+        pthread_t accept_pt;
+        pthread_t server_pt;
+} server;
+
+#include "operf_client.c"
+#include "operf_server.c"
+
+static void usage(void)
+{
+        printf("Usage: operf [OPTION]...\n"
+               "Measures bandwidth between a client and a server\n"
+               "  -l, --listen              Run in server mode\n"
+               "\n"
+               "  -n, --server-apn          Name of the operf server\n"
+               "  -d, --duration            Test duration (s, default 60)\n"
+               "  -r, --rate                Rate (b/s)\n"
+               "  -s, --size                Payload size (B, default 1500)\n"
+               "  -f, --flood               Send SDUs as fast as possible\n"
+               "      --help                Display this help text and exit\n");
+}
+
+int main(int argc, char ** argv)
+{
+        int ret = -1;
+        char * rem = NULL;
+        bool serv = false;
+        char ** argv_dup = argv;
+
+        argc--;
+        argv++;
+
+        client.s_apn = NULL;
+        client.size = 1500;
+        client.duration = 60000;
+        server.timeout = 1000; /* ms */
+        client.rate = 1000000;
+        client.flood = false;
+
+        while (argc > 0) {
+                if (strcmp(*argv, "-n") == 0 ||
+                           strcmp(*argv, "--server_apn") == 0) {
+                        client.s_apn = *(++argv);
+                        --argc;
+                } else if (strcmp(*argv, "-s") == 0 ||
+                           strcmp(*argv, "--size") == 0) {
+                        client.size = strtol(*(++argv), &rem, 10);
+                        --argc;
+                } else if (strcmp(*argv, "-d") == 0 ||
+                           strcmp(*argv, "--duration") == 0) {
+                        client.duration = strtol(*(++argv), &rem, 10) * 1000;
+                        --argc;
+                } else if (strcmp(*argv, "-r") == 0 ||
+                           strcmp(*argv, "--rate") == 0) {
+                        client.rate = strtol(*(++argv), &rem, 10);
+                        if (*rem == 'k')
+                                client.rate *= 1000;
+                        if (*rem == 'M')
+                                client.rate *= MILLION;
+                        if (*rem == 'G')
+                                client.rate *= BILLION;
+                        --argc;
+                } else if (strcmp(*argv, "-f") == 0 ||
+                           strcmp(*argv, "--flood") == 0) {
+                        client.flood = true;
+                } else if (strcmp(*argv, "-l") == 0 ||
+                           strcmp(*argv, "--listen") == 0) {
+                        serv = true;
+                } else {
+                        usage();
+                        exit(EXIT_SUCCESS);
+                }
+                argc--;
+                argv++;
+        }
+
+        if (serv) {
+                if (ap_init(argv_dup[0])) {
+                        printf("Failed to init AP.\n");
+                        exit(EXIT_FAILURE);
+                }
+
+                ret = server_main();
+        } else {
+                if (ap_init(NULL)) {
+                        printf("Failed to init AP.\n");
+                        exit(EXIT_FAILURE);
+                }
+
+                if (client.s_apn == NULL) {
+                        printf("No server specified.\n");
+                        usage();
+                        exit(EXIT_SUCCESS);
+                }
+                if (client.size > OPERF_BUF_SIZE) {
+                        printf("Packet size truncated to %d bytes.\n",
+                               OPERF_BUF_SIZE);
+                        client.size = OPERF_BUF_SIZE;
+                }
+
+                if (client.size < 64) {
+                        printf("Packet size set to 64 bytes.\n");
+                        client.size = 64;
+                }
+
+                ret = client_main();
+        }
+
+        ap_fini();
+
+        if (ret < 0)
+                exit(EXIT_FAILURE);
+
+        exit(EXIT_SUCCESS);
+}
diff --git a/src/tools/operf/operf_client.c b/src/tools/operf/operf_client.c
new file mode 100644
index 00000000..1f6226d4
--- /dev/null
+++ b/src/tools/operf/operf_client.c
@@ -0,0 +1,248 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Ouroboros ping application
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/dev.h>
+#include <ouroboros/time_utils.h>
+
+#ifdef __FreeBSD__
+#define __XSI_VISIBLE 500
+#endif
+
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <arpa/inet.h>
+#include <math.h>
+#include <errno.h>
+#include <float.h>
+
+void shutdown_client(int signo, siginfo_t * info, void * c)
+{
+        (void) info;
+        (void) c;
+
+        switch(signo) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                pthread_cancel(client.reader_pt);
+                pthread_cancel(client.writer_pt);
+        default:
+                return;
+        }
+}
+
+void * reader(void * o)
+{
+        struct timespec timeout = {2, 0};
+
+        char buf[OPERF_BUF_SIZE];
+        int fd = 0;
+        int msg_len = 0;
+
+        (void) o;
+
+        /* FIXME: use flow timeout option once we have it */
+        while (flow_event_wait(client.flows, client.fq, &timeout) != -ETIMEDOUT)
+                while ((fd = fqueue_next(client.fq)) >= 0) {
+                        msg_len = flow_read(fd, buf, OPERF_BUF_SIZE);
+                        if (msg_len != client.size) {
+                                printf("Invalid message on fd %d.\n", fd);
+                                continue;
+                        }
+
+                        ++client.rcvd;
+                }
+
+        return (void *) 0;
+}
+
+void * writer(void * o)
+{
+        int * fdp = (int *) o;
+        long gap = client.size * 8.0 * (BILLION / (double) client.rate);
+
+        struct timespec now;
+        struct timespec start;
+        struct timespec intv = {(gap / BILLION), gap % BILLION};
+
+        char * buf = malloc(client.size);
+        if (buf == NULL)
+                return (void *) -ENOMEM;
+
+        if (fdp == NULL)
+                return (void *) -EINVAL;
+
+        memset(buf, 0, client.size);
+
+        if (client.flood)
+                printf("Flooding %s with %d byte SDUs for %d seconds.\n\n",
+                       client.s_apn, client.size, client.duration / 1000);
+        else
+                printf("Sending %d byte SDUs for %d s to %s at %.3lf Mb/s.\n\n",
+                       client.size, client.duration / 1000, client.s_apn,
+                       client.rate / (double) MILLION);
+
+        clock_gettime(CLOCK_REALTIME, &start);
+        clock_gettime(CLOCK_REALTIME, &now);
+
+        pthread_cleanup_push((void (*) (void *)) free, buf);
+
+        if (client.flood) {
+                while (ts_diff_ms(&start, &now) < client.duration) {
+                        if (flow_write(*fdp, buf, client.size) == -1) {
+                                printf("Failed to send SDU.\n");
+                                flow_dealloc(*fdp);
+                                free(buf);
+                                return (void *) -1;
+                        }
+
+                        ++client.sent;
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+                }
+        } else {
+                while (ts_diff_ms(&start, &now) < client.duration) {
+                        if (flow_write(*fdp, buf, client.size) == -1) {
+                                printf("Failed to send SDU.\n");
+                                flow_dealloc(*fdp);
+                                free(buf);
+                                return (void *) -1;
+                        }
+
+                        ++client.sent;
+
+                        nanosleep(&intv, NULL);
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+                }
+        }
+
+        pthread_cleanup_pop(true);
+
+        printf("Test finished.\n");
+
+        return (void *) 0;
+}
+
+static int client_init(void)
+{
+        client.flows = flow_set_create();
+        if (client.flows == NULL)
+                return -ENOMEM;
+
+        client.fq = fqueue_create();
+        if (client.fq == NULL) {
+                flow_set_destroy(client.flows);
+                return -ENOMEM;
+        }
+
+        client.sent = 0;
+        client.rcvd = 0;
+
+        return 0;
+}
+
+void client_fini(void)
+{
+        if (client.flows != NULL)
+                flow_set_destroy(client.flows);
+
+        if (client.fq != NULL)
+                fqueue_destroy(client.fq);
+}
+
+int client_main(void)
+{
+        struct sigaction sig_act;
+
+        struct timespec tic;
+        struct timespec toc;
+
+        int fd;
+
+        memset(&sig_act, 0, sizeof sig_act);
+        sig_act.sa_sigaction = &shutdown_client;
+        sig_act.sa_flags = 0;
+
+        if (sigaction(SIGINT,  &sig_act, NULL) ||
+            sigaction(SIGTERM, &sig_act, NULL) ||
+            sigaction(SIGHUP,  &sig_act, NULL) ||
+            sigaction(SIGPIPE, &sig_act, NULL)) {
+                printf("Failed to install sighandler.\n");
+                return -1;
+        }
+
+        if (client_init()) {
+                printf("Failed to initialize client.\n");
+                return -1;
+        }
+
+        fd = flow_alloc(client.s_apn, NULL, NULL);
+        if (fd < 0) {
+                flow_set_destroy(client.flows);
+                fqueue_destroy(client.fq);
+                printf("Failed to allocate flow.\n");
+                return -1;
+        }
+
+        flow_set_add(client.flows, fd);
+
+        if (flow_alloc_res(fd)) {
+                printf("Flow allocation refused.\n");
+                flow_set_del(client.flows, fd);
+                flow_dealloc(fd);
+                client_fini();
+                return -1;
+        }
+
+        clock_gettime(CLOCK_REALTIME, &tic);
+
+        pthread_create(&client.reader_pt, NULL, reader, NULL);
+        pthread_create(&client.writer_pt, NULL, writer, &fd);
+
+        pthread_join(client.writer_pt, NULL);
+
+        clock_gettime(CLOCK_REALTIME, &toc);
+
+        pthread_join(client.reader_pt, NULL);
+
+        printf("\n");
+        printf("--- %s perf statistics ---\n", client.s_apn);
+        printf("%ld SDUs transmitted, ", client.sent);
+        printf("%ld received, ", client.rcvd);
+        printf("%ld%% packet loss, ", client.sent == 0 ? 0 :
+               100 - ((100 * client.rcvd) / client.sent));
+        printf("time: %.3f ms, ", ts_diff_us(&tic, &toc) / 1000.0);
+        printf("bandwidth: %.3lf Mb/s.\n",
+               (client.rcvd * client.size * 8)
+               / (double) ts_diff_us(&tic, &toc));
+
+        flow_set_del(client.flows, fd);
+
+        flow_dealloc(fd);
+
+        client_fini();
+
+        return 0;
+}
diff --git a/src/tools/operf/operf_server.c b/src/tools/operf/operf_server.c
new file mode 100644
index 00000000..4eb93879
--- /dev/null
+++ b/src/tools/operf/operf_server.c
@@ -0,0 +1,179 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Ouroboros perf application
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifdef __FreeBSD__
+#define __XSI_VISIBLE 500
+#endif
+
+#include <stdlib.h>
+#include <signal.h>
+#include <arpa/inet.h>
+
+void shutdown_server(int signo, siginfo_t * info, void * c)
+{
+        (void) info;
+        (void) c;
+
+        switch(signo) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                pthread_cancel(server.accept_pt);
+        default:
+                return;
+        }
+}
+
+void * cleaner_thread(void * o)
+{
+        int i = 0;
+        struct timespec now = {0, 0};
+
+        (void) o;
+
+        while (true) {
+                clock_gettime(CLOCK_REALTIME, &now);
+                pthread_mutex_lock(&server.lock);
+                for (i = 0; i < OPERF_MAX_FLOWS; ++i)
+                        if (flow_set_has(server.flows, i) &&
+                            ts_diff_ms(&server.times[i], &now)
+                            > server.timeout) {
+                                printf("Flow %d timed out.\n", i);
+                                flow_set_del(server.flows, i);
+                                flow_dealloc(i);
+                        }
+
+                pthread_mutex_unlock(&server.lock);
+                sleep(1);
+        }
+}
+
+void * server_thread(void *o)
+{
+        int msg_len = 0;
+        struct timespec timeout = {0, 100 * MILLION};
+        struct timespec now = {0, 0};
+        int fd;
+
+        (void) o;
+
+        while (flow_event_wait(server.flows, server.fq, &timeout))
+                while ((fd = fqueue_next(server.fq)) >= 0) {
+                        msg_len = flow_read(fd, server.buffer, OPERF_BUF_SIZE);
+                        if (msg_len < 0)
+                                continue;
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+
+                        pthread_mutex_lock(&server.lock);
+                        server.times[fd] = now;
+                        pthread_mutex_unlock(&server.lock);
+
+                        if (flow_write(fd, server.buffer, msg_len) < 0) {
+                                printf("Error writing to flow (fd %d).\n", fd);
+                                flow_dealloc(fd);
+                        }
+                }
+
+        return (void *) 0;
+}
+
+void * accept_thread(void * o)
+{
+        int fd = 0;
+        struct timespec now = {0, 0};
+        struct qos_spec qs;
+
+        (void) o;
+
+        printf("Ouroboros perf server started.\n");
+
+        while (true) {
+                fd = flow_accept(NULL, &qs);
+                if (fd < 0) {
+                        printf("Failed to accept flow.\n");
+                        break;
+                }
+
+                printf("New flow %d.\n", fd);
+
+                if (flow_alloc_resp(fd, 0)) {
+                        printf("Failed to give an allocate response.\n");
+                        flow_dealloc(fd);
+                        continue;
+                }
+
+                clock_gettime(CLOCK_REALTIME, &now);
+
+                pthread_mutex_lock(&server.lock);
+                flow_set_add(server.flows, fd);
+                server.times[fd] = now;
+                pthread_mutex_unlock(&server.lock);
+        }
+
+        return (void *) 0;
+}
+
+int server_main(void)
+{
+        struct sigaction sig_act;
+
+        memset(&sig_act, 0, sizeof sig_act);
+        sig_act.sa_sigaction = &shutdown_server;
+        sig_act.sa_flags = 0;
+
+        if (sigaction(SIGINT,  &sig_act, NULL) ||
+            sigaction(SIGTERM, &sig_act, NULL) ||
+            sigaction(SIGHUP,  &sig_act, NULL) ||
+            sigaction(SIGPIPE, &sig_act, NULL)) {
+                printf("Failed to install sighandler.\n");
+                return -1;
+        }
+
+        server.flows = flow_set_create();
+        if (server.flows == NULL)
+                return 0;
+
+        server.fq = fqueue_create();
+        if (server.fq == NULL) {
+                flow_set_destroy(server.flows);
+                return -1;
+        }
+
+        pthread_create(&server.cleaner_pt, NULL, cleaner_thread, NULL);
+        pthread_create(&server.accept_pt, NULL, accept_thread, NULL);
+        pthread_create(&server.server_pt, NULL, server_thread, NULL);
+
+        pthread_join(server.accept_pt, NULL);
+
+        pthread_cancel(server.server_pt);
+        pthread_cancel(server.cleaner_pt);
+
+        flow_set_destroy(server.flows);
+        fqueue_destroy(server.fq);
+
+        pthread_join(server.server_pt, NULL);
+        pthread_join(server.cleaner_pt, NULL);
+
+        return 0;
+}
diff --git a/src/tools/oping/oping.c b/src/tools/oping/oping.c
index 801f79b5..8bb01daf 100644
--- a/src/tools/oping/oping.c
+++ b/src/tools/oping/oping.c
@@ -94,7 +94,7 @@ static void usage(void)
                "  -c, --count               Number of packets (default 1000)\n"
                "  -i, --interval            Interval (ms, default 1000)\n"
                "  -n, --server-apn          Name of the oping server\n"
-               "  -s, --size                Payload size (b, default 64)\n"
+               "  -s, --size                Payload size (B, default 64)\n"
                "      --help                Display this help text and exit\n");
 }
 
@@ -164,11 +164,12 @@ int main(int argc, char ** argv)
                         client.interval = 10000;
                 }
                 if (client.size > OPING_BUF_SIZE) {
-                        printf("Packet size truncated to 1500 bytes.\n");
-                        client.size = 1500;
+                        printf("Packet size truncated to %d bytes.\n",
+                               OPING_BUF_SIZE);
+                        client.size = OPING_BUF_SIZE;
                 }
 
-                if (client.size < 2) {
+                if (client.size < 64) {
                         printf("Packet size set to 64 bytes.\n");
                         client.size = 64;
                 }