openvpn: Changes after review, clang-formatting

diff --git a/src/openvpn.c b/src/openvpn.c
index f6d5b99f4814e460598ec64c268b3f4212bc098b..a98649b6de3fbb9c76917464735e3e7555e72e8c 100644 (file)
--- a/src/openvpn.c
+++ b/src/openvpn.c
@@ -68,8 +68,8 @@
  **/
 
 #define TITLE_SINGLE "OpenVPN STATISTICS\n"
-#define TITLE_V1     "OpenVPN CLIENT LIST\n"
-#define TITLE_V2     "TITLE"
+#define TITLE_V1 "OpenVPN CLIENT LIST\n"
+#define TITLE_V2 "TITLE"
 
 #define V1HEADER                                                               \
   "Common Name,Real Address,Bytes Received,Bytes Sent,Connected Since\n"
@@ -94,13 +94,10 @@ static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
 /* Helper function
  * copy-n-pasted from common.c - changed delim to ",\t"  */
 static int openvpn_strsplit(char *string, char **fields, size_t size) {
-  size_t i;
-  char *ptr;
-  char *saveptr;
+  size_t i = 0;
+  char *ptr = string;
+  char *saveptr = NULL;
 
-  i = 0;
-  ptr = string;
-  saveptr = NULL;
   while ((fields[i] = strtok_r(ptr, ",\t", &saveptr)) != NULL) {
     ptr = NULL;
     i++;
@@ -114,7 +111,7 @@ static int openvpn_strsplit(char *string, char **fields, size_t size) {
 
 static void openvpn_free(void *arg) {
   vpn_status_t *st = arg;
-  
+
   sfree(st->file);
   sfree(st);
 } /* void openvpn_free */
@@ -187,25 +184,14 @@ static int single_read(const char *name, FILE *fh) {
   char buffer[1024];
   char *fields[4];
   const int max_fields = STATIC_ARRAY_SIZE(fields);
-  int fields_num;
-
-  derive_t link_rx, link_tx;
-  derive_t tun_rx, tun_tx;
-  derive_t pre_compress, post_compress;
-  derive_t pre_decompress, post_decompress;
-  derive_t overhead_rx, overhead_tx;
-
-  link_rx = 0;
-  link_tx = 0;
-  tun_rx = 0;
-  tun_tx = 0;
-  pre_compress = 0;
-  post_compress = 0;
-  pre_decompress = 0;
-  post_decompress = 0;
+
+  derive_t link_rx = 0, link_tx = 0;
+  derive_t tun_rx = 0, tun_tx = 0;
+  derive_t pre_compress = 0, post_compress = 0;
+  derive_t pre_decompress = 0, post_decompress = 0;
 
   while (fgets(buffer, sizeof(buffer), fh) != NULL) {
-    fields_num = openvpn_strsplit(buffer, fields, max_fields);
+    int fields_num = openvpn_strsplit(buffer, fields, max_fields);
 
     /* status file is generated by openvpn/sig.c:print_status()
      * http://svn.openvpn.net/projects/openvpn/trunk/openvpn/sig.c
@@ -241,8 +227,9 @@ static int single_read(const char *name, FILE *fh) {
   iostats_submit(name, "traffic", link_rx, link_tx);
 
   /* we need to force this order to avoid negative values with these unsigned */
-  overhead_rx = (((link_rx - pre_decompress) + post_decompress) - tun_rx);
-  overhead_tx = (((link_tx - post_compress) + pre_compress) - tun_tx);
+  derive_t overhead_rx =
+      (((link_rx - pre_decompress) + post_decompress) - tun_rx);
+  derive_t overhead_tx = (((link_tx - post_compress) + pre_compress) - tun_tx);
 
   iostats_submit(name, "overhead", overhead_rx, overhead_tx);
 
@@ -258,8 +245,9 @@ static int single_read(const char *name, FILE *fh) {
 static int multi1_read(const char *name, FILE *fh) {
   char buffer[1024];
   char *fields[10];
-  int fields_num, found_header = 0;
+  const int max_fields = STATIC_ARRAY_SIZE(fields);
   long long sum_users = 0;
+  _Bool found_header = 0;
 
   /* read the file until the "ROUTING TABLE" line is found (no more info after)
    */
@@ -277,7 +265,7 @@ static int multi1_read(const char *name, FILE *fh) {
       /* we can't start reading data until this string is found */
       continue;
 
-    fields_num = openvpn_strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
+    int fields_num = openvpn_strsplit(buffer, fields, max_fields);
     if (fields_num < 4)
       continue;
 
@@ -330,17 +318,16 @@ static int multi2_read(const char *name, FILE *fh) {
    */
   char *fields[20];
   const int max_fields = STATIC_ARRAY_SIZE(fields);
-  int fields_num;
   long long sum_users = 0;
-  
-  int found_header = 0;
+
+  _Bool found_header = 0;
   int idx_cname = 0;
   int idx_bytes_recv = 0;
   int idx_bytes_sent = 0;
   int columns = 0;
 
   while (fgets(buffer, sizeof(buffer), fh) != NULL) {
-    fields_num = openvpn_strsplit(buffer, fields, max_fields);
+    int fields_num = openvpn_strsplit(buffer, fields, max_fields);
 
     /* Try to find section header */
     if (found_header == 0) {
@@ -354,11 +341,9 @@ static int multi2_read(const char *name, FILE *fh) {
       for (int i = 2; i < fields_num; i++) {
         if (strcmp(fields[i], "Common Name") == 0) {
           idx_cname = i - 1;
-        }
-        else if (strcmp(fields[i], "Bytes Received") == 0) {
+        } else if (strcmp(fields[i], "Bytes Received") == 0) {
           idx_bytes_recv = i - 1;
-        }
-        else if (strcmp(fields[i], "Bytes Sent") == 0) {
+        } else if (strcmp(fields[i], "Bytes Sent") == 0) {
           idx_bytes_sent = i - 1;
         }
       }
@@ -387,7 +372,8 @@ static int multi2_read(const char *name, FILE *fh) {
     /* Check if the data line fields count matches header line. */
     if (fields_num != columns) {
       ERROR("openvpn plugin: File format error in instance %s: Fields count "
-            "mismatch.", name);
+            "mismatch.",
+            name);
       return -1;
     }
 
@@ -407,7 +393,7 @@ static int multi2_read(const char *name, FILE *fh) {
                        atoll(fields[idx_bytes_sent])); /* "Bytes Sent"     */
       } else {
         /* plugin inst = fields[idx_cname], type inst = "" */
-        iostats_submit(fields[idx_cname],              /* "Common Name"    */
+        iostats_submit(fields[idx_cname], /*              "Common Name"    */
                        NULL,              /* unused when in multimode      */
                        atoll(fields[idx_bytes_recv]),  /* "Bytes Received" */
                        atoll(fields[idx_bytes_sent])); /* "Bytes Sent"     */
@@ -436,14 +422,12 @@ static int multi2_read(const char *name, FILE *fh) {
 
 /* read callback */
 static int openvpn_read(user_data_t *user_data) {
-  FILE *fh;
   char buffer[1024];
   int read = 0;
 
-  vpn_status_t *st;
-  st = user_data->data;
+  vpn_status_t *st = user_data->data;
 
-  fh = fopen(st->file, "r");
+  FILE *fh = fopen(st->file, "r");
   if (fh == NULL) {
     char errbuf[1024];
     WARNING("openvpn plugin: fopen(%s) failed: %s", st->file,
@@ -452,31 +436,28 @@ static int openvpn_read(user_data_t *user_data) {
     return -1;
   }
 
-  //Try to detect file format by its first line
+  // Try to detect file format by its first line
   if ((fgets(buffer, sizeof(buffer), fh)) == NULL) {
     WARNING("openvpn plugin: failed to get data from: %s", st->file);
     fclose(fh);
     return -1;
   }
 
-  if (strcmp(buffer, TITLE_SINGLE) == 0) { //OpenVPN STATISTICS
+  if (strcmp(buffer, TITLE_SINGLE) == 0) { // OpenVPN STATISTICS
     DEBUG("openvpn plugin: found status file SINGLE");
     read = single_read(st->name, fh);
-  }
-  else if (strcmp(buffer, TITLE_V1) == 0) { //OpenVPN CLIENT LIST
+  } else if (strcmp(buffer, TITLE_V1) == 0) { // OpenVPN CLIENT LIST
     DEBUG("openvpn plugin: found status file MULTI version 1");
     read = multi1_read(st->name, fh);
-  }
-  else if (strncmp(buffer, TITLE_V2, strlen(TITLE_V2)) == 0) { //TITLE
+  } else if (strncmp(buffer, TITLE_V2, strlen(TITLE_V2)) == 0) { // TITLE
     DEBUG("openvpn plugin: found status file MULTI version 2/3");
     read = multi2_read(st->name, fh);
-  }
-  else {
+  } else {
     NOTICE("openvpn plugin: %s: Unknown file format, please "
            "report this as bug. Make sure to include "
            "your status file, so the plugin can "
-           "be adapted. BUF %s",
-           st->file, buffer);
+           "be adapted.",
+           st->file);
     read = -1;
   }
   fclose(fh);
@@ -486,20 +467,19 @@ static int openvpn_read(user_data_t *user_data) {
 static int openvpn_config(const char *key, const char *value) {
   if (strcasecmp("StatusFile", key) == 0) {
     char callback_name[3 * DATA_MAX_NAME_LEN];
-    char *status_file, *status_name, *filename;
-    vpn_status_t *instance;
+    char *status_name;
 
-    status_file = sstrdup(value);
+    char *status_file = strdup(value);
     if (status_file == NULL) {
       char errbuf[1024];
-      ERROR("openvpn plugin: sstrdup failed: %s",
+      ERROR("openvpn plugin: strdup failed: %s",
             sstrerror(errno, errbuf, sizeof(errbuf)));
       return 1;
     }
 
     /* it determines the file name as string starting at location filename + 1
      */
-    filename = strrchr(status_file, (int)'/');
+    char *filename = strrchr(status_file, (int)'/');
     if (filename == NULL) {
       /* status_file is already the file name only */
       status_name = status_file;
@@ -509,7 +489,7 @@ static int openvpn_config(const char *key, const char *value) {
     }
 
     /* create a new vpn element */
-    instance = malloc(sizeof(*instance));
+    vpn_status_t *instance = calloc(1, sizeof(*instance));
     if (instance == NULL) {
       char errbuf[1024];
       ERROR("openvpn plugin: malloc failed: %s",
@@ -520,17 +500,16 @@ static int openvpn_config(const char *key, const char *value) {
     instance->file = status_file;
     instance->name = status_name;
 
-    int status;
-
-    ssnprintf(callback_name, sizeof(callback_name), "openvpn/%s", status_name);
+    snprintf(callback_name, sizeof(callback_name), "openvpn/%s", status_name);
 
-    status = plugin_register_complex_read(
-      /* group = */ "openvpn",
-      /* name      = */ callback_name,
-      /* callback  = */ openvpn_read,
-      /* interval  = */ 0, &(user_data_t){
-                               .data = instance, .free_func = openvpn_free,
-                           });
+    int status = plugin_register_complex_read(
+        /* group = */ "openvpn",
+        /* name      = */ callback_name,
+        /* callback  = */ openvpn_read,
+        /* interval  = */ 0,
+        &(user_data_t){
+            .data = instance, .free_func = openvpn_free,
+        });
 
     if (status == EINVAL) {
       WARNING("openvpn plugin: status filename \"%s\" "