tools: Add a ping application

Ouoroboros ping application mimics the GNU ping application.
do "oping --help" for options.

4 files changed, 593 insertions, 0 deletions

diff --git a/src/tools/oping/CMakeLists.txt b/src/tools/oping/CMakeLists.txt
new file mode 100644
index 00000000..a8fc7d86
--- /dev/null
+++ b/src/tools/oping/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
+        oping.c
+)
+
+add_executable(oping ${SOURCE_FILES})
+
+target_link_libraries(oping LINK_PUBLIC ${LIBM_LIBRARIES} ouroboros)
+
+install(TARGETS oping RUNTIME DESTINATION usr/bin)
diff --git a/src/tools/oping/oping.c b/src/tools/oping/oping.c
new file mode 100644
index 00000000..cf8dc485
--- /dev/null
+++ b/src/tools/oping/oping.c
@@ -0,0 +1,176 @@
+/*
+ * 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.
+ */
+
+#define _POSIX_C_SOURCE 199506L
+
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define OPING_BUF_SIZE 1500
+
+#define ECHO_REQUEST 0
+#define ECHO_REPLY 1
+
+#define OPING_MAX_FLOWS 256
+
+struct c {
+        char * s_apn;
+        int    interval;
+        int    count;
+        int    size;
+
+        /* stats */
+        int    sent;
+        int    rcvd;
+        float  rtt_min;
+        float  rtt_max;
+        float  rtt_avg;
+        float  rtt_m2;
+
+        /* needs locking */
+        struct timespec * times;
+        pthread_mutex_t lock;
+
+        pthread_t reader_pt;
+        pthread_t writer_pt;
+} client;
+
+struct s {
+        struct timespec times[OPING_MAX_FLOWS];
+        pthread_mutex_t lock;
+
+        pthread_t cleaner_pt;
+        pthread_t accept_pt;
+        pthread_t server_pt;
+} server;
+
+struct oping_msg {
+        uint32_t type;
+        uint32_t id;
+};
+
+
+#include "oping_client.c"
+#include "oping_server.c"
+
+static void usage()
+{
+        printf("Usage: oping [OPTION]...\n"
+               "Checks liveness between a client and a server\n"
+               "and reports the Round Trip Time (RTT)\n\n"
+               "  -l, --listen              Run in server mode\n"
+               "\n"
+               "  -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"
+               "      --help                Display this help text and exit\n");
+}
+
+int main(int argc, char ** argv)
+{
+        int ret = -1;
+        char * rem = NULL;
+        bool serv = false;
+
+        if (ap_init(argv[0])) {
+                printf("Failed to init AP.\n");
+                exit(EXIT_FAILURE);
+        }
+
+        argc--;
+        argv++;
+
+        client.s_apn = NULL;
+        client.interval = 1000;
+        client.size = 64;
+        client.count = 1000;
+
+        while (argc > 0) {
+                if (strcmp(*argv, "-i") == 0 ||
+                    strcmp(*argv, "--interval") == 0) {
+                        client.interval = strtol(*(++argv), &rem, 10);
+                        --argc;
+                } else if (strcmp(*argv, "-n") == 0 ||
+                           strcmp(*argv, "--server_apn") == 0) {
+                        client.s_apn = *(++argv);
+                        --argc;
+                } else if (strcmp(*argv, "-c") == 0 ||
+                           strcmp(*argv, "--count") == 0) {
+                        client.count = strtol(*(++argv), &rem, 10);
+                        --argc;
+                } else if (strcmp(*argv, "-s") == 0 ||
+                           strcmp(*argv, "--size") == 0) {
+                        client.size = strtol(*(++argv), &rem, 10);
+                        --argc;
+                } else if (strcmp(*argv, "-l") == 0 ||
+                           strcmp(*argv, "--listen") == 0) {
+                        serv = true;
+                } else {
+                        usage();
+                        exit(EXIT_SUCCESS);
+                }
+                argc--;
+                argv++;
+        }
+
+        if (serv) {
+                ret = server_main();
+        } else {
+                if (client.s_apn == NULL) {
+                        printf("No server specified.\n");
+                        usage();
+                        exit(EXIT_SUCCESS);
+                }
+                if (client.interval > 10000) {
+                        printf("Ping interval truncated to 10s.\n");
+                        client.interval = 10000;
+                }
+                if (client.size > OPING_BUF_SIZE) {
+                        printf("Packet size truncated to 1500 bytes.\n");
+                        client.size = 1500;
+                }
+
+                if (client.size < 2) {
+                        printf("Packet size set to 64 bytes.\n");
+                        client.size = 64;
+                }
+
+                if (client.count > 1000000) {
+                        printf("Count truncated to 1 million SDUs.\n");
+                        client.count = 1000000;
+                }
+
+                ret = client_main();
+        }
+
+        ap_fini();
+
+        if (ret < 0)
+                exit(EXIT_FAILURE);
+
+        exit(EXIT_SUCCESS);
+}
diff --git a/src/tools/oping/oping_client.c b/src/tools/oping/oping_client.c
new file mode 100644
index 00000000..23a57549
--- /dev/null
+++ b/src/tools/oping/oping_client.c
@@ -0,0 +1,234 @@
+/*
+ * 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/errno.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 <float.h>
+
+void shutdown_client(int signo, siginfo_t * 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};
+        struct timespec now = {0, 0};
+
+        struct oping_msg * msg;
+        char buf[OPING_BUF_SIZE];
+        int fd = 0;
+        int msg_len = 0;
+        float ms = 0;
+        float d = 0;
+
+        msg = (struct oping_msg *) buf;
+
+        /* FIXME: use flow timeout option once we have it */
+        while(client.rcvd != client.count &&
+              (fd = flow_select(&timeout)) != -ETIMEDOUT) {
+                flow_cntl(fd, FLOW_F_SETFL, FLOW_O_NONBLOCK);
+                while (!((msg_len = flow_read(fd, buf, OPING_BUF_SIZE)) < 0)) {
+                        if (msg_len < 0)
+                                continue;
+
+                        if (ntohl(msg->type) != ECHO_REPLY) {
+                                printf("Invalid message received (%d).\n",
+                                       msg->type);
+                                continue;
+                        }
+
+                        if (ntohl(msg->id) >= client.count) {
+                                printf("Invalid id.\n");
+                                continue;
+                        }
+
+                        ++client.rcvd;
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+
+                        pthread_mutex_lock(&client.lock);
+                        ms = ts_diff_us(&client.times[ntohl(msg->id)], &now)
+                                /1000.0;
+                        pthread_mutex_unlock(&client.lock);
+
+                        printf("%d bytes from %s: seq=%d time=%.3f ms\n",
+                               msg_len,
+                               client.s_apn,
+                               ntohl(msg->id),
+                               ms);
+
+                        if (ms < client.rtt_min)
+                                client.rtt_min = ms;
+                        if (ms > client.rtt_max)
+                                client.rtt_max = ms;
+
+                        d = (ms - client.rtt_avg);
+                        client.rtt_avg += d  / (float) client.rcvd;
+                        client.rtt_m2 += d * (ms - client.rtt_avg);
+                }
+        }
+
+        return (void *) 0;
+}
+
+void * writer(void * o)
+{
+        int * fdp = (int *) o;
+        struct timespec now;
+        struct timespec wait = {client.interval / 1000, client.interval % 1000};
+        struct oping_msg * msg;
+        char * buf = malloc(client.size);
+
+        if (buf == NULL)
+                return (void *) -ENOMEM;
+
+        if (fdp == NULL)
+                return (void *) -EINVAL;
+
+        memset(buf, 0, client.size);
+
+        msg = (struct oping_msg *) buf;
+
+        printf("Pinging %s with %d bytes of data:\n\n",
+               client.s_apn, client.size);
+
+        while (client.sent < client.count) {
+                nanosleep(&wait, NULL);
+                msg->id = htonl(client.sent);
+                if (flow_write(*fdp, buf, client.size) == -1) {
+                        printf("Failed to send SDU.\n");
+                        flow_dealloc(*fdp);
+                        return (void *) -1;
+                }
+
+                clock_gettime(CLOCK_REALTIME, &now);
+
+                pthread_mutex_lock(&client.lock);
+                client.times[client.sent++] = now;
+                pthread_mutex_unlock(&client.lock);
+        }
+
+        return (void *) 0;
+}
+
+int client_main()
+{
+        struct sigaction sig_act;
+
+        struct timespec tic;
+        struct timespec toc;
+
+        int fd = flow_alloc(client.s_apn, NULL, NULL);
+        if (fd < 0) {
+                printf("Failed to allocate flow.\n");
+                return -1;
+        }
+
+        if (flow_alloc_res(fd)) {
+                printf("Flow allocation refused.\n");
+                flow_dealloc(fd);
+                return -1;
+        }
+
+        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;
+        }
+
+        pthread_mutex_init(&client.lock, NULL);
+        pthread_mutex_lock(&client.lock);
+        client.sent = 0;
+        client.rcvd = 0;
+        client.rtt_min = FLT_MAX;
+        client.rtt_max = 0;
+        client.rtt_avg = 0;
+        client.rtt_m2 = 0;
+        client.times = malloc(sizeof(struct timespec) * client.count);
+        if (client.times == NULL) {
+                pthread_mutex_unlock(&client.lock);
+                return -ENOMEM;
+        }
+
+        pthread_mutex_unlock(&client.lock);
+
+        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);
+        pthread_join(client.reader_pt, NULL);
+
+        clock_gettime(CLOCK_REALTIME, &toc);
+
+        printf("\n");
+        printf("--- %s ping statistics ---\n", client.s_apn);
+        printf("%d SDU's transmitted, ", client.sent);
+        printf("%d received, ", client.rcvd);
+        printf("%d%% packet loss, ", 100 - ((100 * client.rcvd) / client.sent));
+        printf("time: %.3f ms\n", ts_diff_us(&tic, &toc) / 1000.0);
+        printf("rtt min/avg/max/mdev = %.3f/%.3f/%.3f/",
+               client.rtt_min,
+               client.rtt_avg,
+               client.rtt_max);
+        client.rcvd > 1 ?
+                printf("%.3f ms\n",
+                       sqrt(client.rtt_m2 / (float) (client.rcvd - 1))) :
+                printf("Nan ms\n");
+
+        pthread_mutex_lock(&client.lock);
+        free(client.times);
+        pthread_mutex_unlock(&client.lock);
+        pthread_mutex_destroy(&client.lock);
+
+        flow_dealloc(fd);
+
+        return 0;
+}
diff --git a/src/tools/oping/oping_server.c b/src/tools/oping/oping_server.c
new file mode 100644
index 00000000..eb0b511b
--- /dev/null
+++ b/src/tools/oping/oping_server.c
@@ -0,0 +1,162 @@
+/*
+ * 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>
+
+#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)
+{
+        switch(signo) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                pthread_cancel(server.server_pt);
+                pthread_cancel(server.accept_pt);
+                pthread_cancel(server.cleaner_pt);
+        default:
+                return;
+        }
+}
+
+void * cleaner_thread(void * o)
+{
+        int i = 0;
+        struct timespec now = {0, 0};
+        int deadline_ms = 10000;
+
+        while (true) {
+                clock_gettime(CLOCK_REALTIME, &now);
+                pthread_mutex_lock(&server.lock);
+                for (i = 0; i < OPING_MAX_FLOWS; ++i)
+                        if (ts_diff_ms(&server.times[i], &now) > deadline_ms)
+                                flow_dealloc(i);
+
+                pthread_mutex_unlock(&server.lock);
+                sleep(1);
+        }
+}
+
+void * server_thread(void *o)
+{
+        char buf[OPING_BUF_SIZE];
+        int msg_len = 0;
+        struct oping_msg * msg = (struct oping_msg *) buf;
+        struct timespec now = {0, 0};
+
+        while (true) {
+
+                int fd = flow_select(NULL);
+                while (!((msg_len = flow_read(fd, buf, OPING_BUF_SIZE)) < 0)) {
+                        if (msg_len < 0)
+                                continue;
+
+                        if (ntohl(msg->type) != ECHO_REQUEST) {
+                                printf("Invalid message received.\n");
+                                continue;
+                        }
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+
+                        pthread_mutex_lock(&server.lock);
+                        server.times[fd] = now;
+                        pthread_mutex_unlock(&server.lock);
+
+                        msg->type = htonl((uint32_t) ECHO_REPLY);
+
+                        if (flow_write(fd, buf, 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};
+
+        printf("Ouroboros ping server started.\n");
+
+        while (true) {
+                fd = flow_accept(NULL);
+                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);
+                server.times[fd] = now;
+                pthread_mutex_unlock(&server.lock);
+
+                flow_cntl(fd, FLOW_F_SETFL, FLOW_O_NONBLOCK);
+        }
+
+        return (void *) 0;
+}
+
+int server_main()
+{
+        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;
+        }
+
+        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.server_pt, NULL);
+        pthread_join(server.accept_pt, NULL);
+        pthread_join(server.cleaner_pt, NULL);
+
+        return 0;
+}