C webapp

1 files changed, 105 insertions, 0 deletions

diff --git a/monitor.c b/monitor.c
new file mode 100644
index 0000000..c9903ce
--- /dev/null
+++ b/monitor.c
@@ -0,0 +1,105 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "monitor.h"
+
+typedef enum {
+    TYPE_REACH,
+    TYPE_DNS,
+    TYPE_WEB
+} type_t;
+
+const char *type_str[] = { "reach", "dns", "web" };
+
+typedef enum {
+    STATUS_DOWN,
+    STATUS_UP
+} status_t;
+
+typedef struct {
+    type_t type;
+    char *target;
+    status_t status;
+} target_t;
+
+static target_t targets[256];
+static size_t target_n = 0;
+
+int
+monitor_init(const char *cfg_file) {
+    FILE *cfgf = fopen(cfg_file, "r");
+    if (!cfgf) {
+        fprintf(stderr, "Error opening config: %s\n", strerror(errno));
+        return -1;
+    }
+
+    printf("monitor targets:\n");
+    
+    char line[256];
+    while (fgets(line, sizeof(line), cfgf)) {
+        if (*line == '#' || *line == '\n')
+            continue;
+
+        char *type = line;
+        char *target = strchr(line, '=');
+        if (!target) {
+            fprintf(stderr, "malformed config line: %s\n", line);
+            continue;
+        }
+
+
+        *target = '\0';
+        target++;
+
+        if (strcmp(type, "reach") == 0)
+            targets[target_n].type = TYPE_REACH;
+        else if (strcmp(type, "dns") == 0)
+            targets[target_n].type = TYPE_DNS;
+        else if (strcmp(type, "web") == 0)
+            targets[target_n].type = TYPE_WEB;
+
+        targets[target_n].target = strdup(target);
+        targets[target_n].status = STATUS_DOWN;
+
+        printf("\t%s: %s", type_str[targets[target_n].type],
+            targets[target_n].target);
+        
+        target_n++;
+    } 
+
+    fclose(cfgf);
+
+    return 0;
+}
+
+const char *
+monitor_generate_status_html()
+{
+    static char buff[65535];
+
+    static char *status_html[] = {
+        "down",
+        "up"
+    };
+   
+    char *pos = buff;
+
+    for (size_t i = 0; i < target_n; i++) {
+        pos += snprintf(pos, 65535,
+            "<tr><td>%s</td><td>%s</td><td>%s</td></tr>\n",
+            type_str[targets[i].type],
+            targets[i].target,
+            status_html[targets[i].status]);
+    }
+
+    return buff;  
+}
+
+void
+monitor_check()
+{
+
+}
+