graph export timer for manynodes example

[meshlink] / examples / manynodes.c

diff --git a/examples/manynodes.c b/examples/manynodes.c
index 96aa5f0f9843db84bb7c4bc7481a285965fa6491..3215cfccd1f7fbf97f3d656225e20455036da895 100644 (file)
--- a/examples/manynodes.c
+++ b/examples/manynodes.c
@@ -7,6 +7,14 @@
 #include <linux/limits.h>
 
 #include "../src/meshlink.h"
+#include "../src/devtools.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include <sys/time.h>
+#include <signal.h>
 
 static int n = 10;
 static meshlink_handle_t **mesh;
@@ -62,6 +70,107 @@ static void linkmesh() {
        }
 }
 
+static bool exportmeshgraph(const char* path)
+{
+       struct stat ps;
+       int psr = stat(path, &ps);
+
+       if(psr == 0 || errno != ENOENT)
+       {
+               if(psr == -1)
+                       { perror("stat"); }
+               else
+                       { fprintf(stderr, "%s exists already\n", path); }
+
+               return false;
+       }
+
+       FILE* stream = fopen(path, "w");
+
+       if(!stream)
+       {
+               perror("stream");
+               return false;
+       }
+
+       if(!devtool_export_json_all_edges_state(mesh[0], stream))
+       {
+               fclose(stream);
+               fprintf(stderr, "could not export graph\n");
+               return false;
+       }
+
+       fclose(stream);
+       return true;
+}
+
+
+void exportmeshgraph_timer(int signum)
+{
+       struct timeval ts;
+       gettimeofday(&ts, NULL);
+
+       char name[1024];
+       snprintf(name, sizeof(name), "graph_%ld_%ld.json", ts.tv_sec, ts.tv_usec/1000);
+
+       exportmeshgraph(name);
+}
+
+static bool exportmeshgraph_started = false;
+
+static bool exportmeshgraph_end(const char* none)
+{
+       if(!exportmeshgraph_started)
+               { return false; }
+
+       struct itimerval zero_timer = { 0 };
+       setitimer (ITIMER_REAL, &zero_timer, NULL);
+
+       exportmeshgraph_started = false;
+
+       return true;
+}
+
+static bool exportmeshgraph_begin(const char* timeout_str)
+{
+       if(!timeout_str)
+               return false;
+
+       if(exportmeshgraph_started)
+       {
+               if(!exportmeshgraph_end(NULL))
+                       return false;
+       }
+
+       // get timeout
+       int timeout = atoi(timeout_str);
+
+       if(timeout < 100)
+               { timeout = 100; }
+
+       int timeout_sec = timeout / 1000;
+       int timeout_msec = timeout % 1000;
+
+       /* Install timer_handler as the signal handler for SIGALRM. */
+       signal(SIGALRM, exportmeshgraph_timer);
+
+       /* Configure the timer to expire after X msec... */
+       struct itimerval timer;
+       timer.it_value.tv_sec = timeout_sec;
+       timer.it_value.tv_usec = timeout_msec * 1000;
+
+       /* ... and every X msec after that. */
+       timer.it_interval.tv_sec = timeout_sec;
+       timer.it_interval.tv_usec = timeout_msec * 1000;
+
+       /* Start a real timer. */
+       setitimer (ITIMER_REAL, &timer, NULL);
+
+       exportmeshgraph_started = true;
+
+       return true;
+}
+
 static void parse_command(char *buf) {
        char *arg = strchr(buf, ' ');
        if(arg)
@@ -131,6 +240,12 @@ static void parse_command(char *buf) {
                }
        } else if(!strcasecmp(buf, "link")) {
                linkmesh();
+       } else if(!strcasecmp(buf, "eg")) {
+               exportmeshgraph(arg);
+       } else if(!strcasecmp(buf, "egb")) {
+               exportmeshgraph_begin(arg);
+       } else if(!strcasecmp(buf, "ege")) {
+               exportmeshgraph_end(NULL);
        } else if(!strcasecmp(buf, "test")) {
                testmesh();
        } else if(!strcasecmp(buf, "quit")) {
@@ -145,6 +260,7 @@ static void parse_command(char *buf) {
                        "/kick <name>          Blacklist the given node.\n"
                        "/who [<name>]         List all nodes or show information about the given node.\n"
                        "/link                 Link all nodes together.\n"
+                       "/eg <path>            Export graph as json file.\n"
                        "/test                 Test functionality sending some data to all nodes\n"
                        "/quit                 Exit this program.\n"
                        );
@@ -232,7 +348,7 @@ int main(int argc, char *argv[]) {
 
        mesh = calloc(n, sizeof *mesh);
 
-       meshlink_set_log_cb(NULL, MESHLINK_INFO, log_message);
+       meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_message);
        mkdir(basebase, 0750);
 
        char filename[PATH_MAX];
@@ -241,8 +357,8 @@ int main(int argc, char *argv[]) {
                snprintf(nodename, sizeof nodename, "%snode%d", namesprefix,i);
                snprintf(filename, sizeof filename, "%s/%s", basebase, nodename);
                bool itsnew = access(filename, R_OK);
-               mesh[i] = meshlink_open(filename, nodename, "manynodes", STATIONARY);
-               meshlink_set_log_cb(mesh[i], MESHLINK_INFO, log_message);
+               mesh[i] = meshlink_open(filename, nodename, "manynodes", i%_DEV_CLASS_MAX);
+               meshlink_set_log_cb(mesh[i], MESHLINK_WARNING, log_message);
                if(itsnew)
                        meshlink_add_address(mesh[i], "localhost");
                if(!mesh[i]) {
@@ -268,6 +384,7 @@ int main(int argc, char *argv[]) {
 
        printf("%d nodes started.\nType /help for a list of commands.\n", started);
 
+       // handle input
        while(fgets(buf, sizeof buf, stdin))
                parse_input(buf);